:root {
  --bg: #faf8f4;
  --surface: #ffffff;
  --surface-hover: #f5f0e8;
  --border: #e0d8c8;
  --border-light: #ccc4b0;
  --primary: #8a6520;
  --primary-light: #7a5518;
  --primary-dark: #6a4510;
  --btn-primary-text: #fff;
  --text: #1a1510;
  --text-muted: #5c4535;
  --accent: #6b4c3b;
  --accent-light: #8b6c5b;
  --danger: #c44;
  --success: #4a8;
  --font-heading: "Playfair Display", Georgia, serif;
  --font-body: "Inter", -apple-system, sans-serif;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --hover-bg: rgba(0, 0, 0, 0.04);
  --transition: 0.3s ease;
}
html[data-theme="dark"] {
  --bg: #111009;
  --surface: #1c1a14;
  --surface-hover: #252318;
  --border: #2e2b1f;
  --border-light: #3a3628;
  --primary: #c9a84c;
  --primary-light: #d4b460;
  --primary-dark: #a88a3a;
  --btn-primary-text: #1a1510;
  --text: #f0ebe0;
  --text-muted: #9a8f78;
  --accent: #c9a84c;
  --accent-light: #d4b460;
  --danger: #e05555;
  --success: #5bc48a;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --hover-bg: rgba(255, 255, 255, 0.06);
}
*,
*:before,
*:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
/* Allow text selection in form fields */
input, textarea, select, [contenteditable] {
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-light);
}
img {
  max-width: 100%;
  height: auto;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  flex-shrink: 0;
}
.logo:hover {
  color: var(--primary);
}
.logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}
.logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--text);
  background: var(--hover-bg);
}
.nav-link.active {
  color: var(--primary);
  background: #c9a84c1a;
}
.nav-dropdown {
  position: relative;
}
.nav-dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
}
.nav-dropdown-btn svg {
  transition: transform var(--transition);
}
.nav-dropdown.open .nav-dropdown-btn svg {
  transform: rotate(180deg);
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 0;
  min-width: 180px;
  box-shadow: var(--shadow);
  z-index: 110;
}
.nav-dropdown.open .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-link {
  display: block;
  padding: 10px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.nav-dropdown-link:hover {
  color: var(--text);
  background: var(--hover-bg);
}
.nav-dropdown-link.active {
  color: var(--primary);
}
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.theme-toggle:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--surface-hover);
}
.theme-icon-moon { display: none; }
html[data-theme="dark"] .theme-icon-sun { display: none; }
html[data-theme="dark"] .theme-icon-moon { display: block; }
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  z-index: 120;
}
.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
  border-radius: 2px;
}
.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 8px 16px 16px;
  gap: 2px;
}
.mobile-nav.open {
  display: flex;
}
.mobile-nav-link {
  display: block;
  padding: 12px 16px;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.mobile-nav-link:hover {
  color: var(--text);
  background: var(--hover-bg);
}
.mobile-nav-link.active {
  color: var(--primary);
  background: #c9a84c1a;
}
body.nav-open {
  overflow: hidden;
}
.piano-decoration {
  display: flex;
  height: 3px;
  overflow: hidden;
}
.piano-key-deco {
  flex: 1;
  background: var(--primary-dark);
  opacity: 0.3;
}
.piano-key-deco.black {
  background: var(--bg);
  opacity: 0.6;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: var(--btn-primary-text);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #1a1510;
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-outline:hover {
  background: #c9a84c1a;
  color: var(--primary-light);
}
.btn-full {
  width: 100%;
}
.hero {
  position: relative;
  overflow: hidden;
  padding: 100px 0 80px;
  background:
    radial-gradient(
      ellipse at 20% 50%,
      rgba(201, 168, 76, 0.07) 0%,
      transparent 60%
    ),
    radial-gradient(
      ellipse at 80% 50%,
      rgba(107, 76, 59, 0.07) 0%,
      transparent 60%
    );
}
.hero-bg-characters {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center bottom;
  opacity: 0.5;
  pointer-events: none;
  user-select: none;
}
.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  position: relative;
  z-index: 1;
}
.hero-content {
  max-width: 600px;
}
.hero-title {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 16px;
}
.gold {
  color: var(--primary);
}
.hero-subtitle {
  font-size: 1.25rem;
  color: var(--primary-dark);
  margin-bottom: 12px;
  font-weight: 300;
}
.hero-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.treble-clef {
  font-size: 12rem;
  color: var(--primary);
  opacity: 0.25;
  line-height: 1;
  user-select: none;
}
.section {
  padding: 60px 0;
}
.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 16px;
}
.page-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 600;
  margin-bottom: 24px;
}
.staff-divider {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 16px auto 40px;
  max-width: 200px;
}
.staff-divider .staff-line {
  height: 1px;
  background: var(--border);
}
.grades-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 20px;
}
.grade-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  transition: all var(--transition);
  display: block;
  color: var(--text);
}
.grade-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.grade-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}
.grade-label {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.topic-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  display: block;
  color: var(--text);
}
.topic-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.topic-card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 8px;
}
.topic-card-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.lesson-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
  display: block;
  color: var(--text);
  position: relative;
  overflow: hidden;
}
.lesson-card:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.lesson-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.lesson-card:hover:before {
  opacity: 1;
}
.lesson-type-badge {
  display: inline-block;
  background: #c9a84c26;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 99px;
  margin-bottom: 12px;
}
.lesson-card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.lesson-card-meta {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 8px;
}
.lesson-card-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.lessons-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.lesson-list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  color: var(--text);
  transition: all var(--transition);
}
.lesson-list-item:hover {
  border-color: var(--primary);
  background: var(--surface-hover);
  color: var(--text);
}
.lesson-icon {
  color: var(--primary);
  flex-shrink: 0;
}
.lesson-info {
  flex: 1;
}
.lesson-list-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 4px;
}
.lesson-list-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.lesson-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}
.lesson-type-tag {
  font-size: 0.75rem;
  background: #c9a84c26;
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 99px;
}
.lesson-media-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.lesson-description {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.lesson-content {
  margin-top: 32px;
  line-height: 1.8;
}
.lesson-content h2,
.lesson-content h3 {
  font-family: var(--font-heading);
  margin: 24px 0 12px;
}
.lesson-content p {
  margin-bottom: 16px;
}
.lesson-content img {
  border-radius: var(--radius);
  margin: 16px 0;
}
.audio-player {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 24px 0;
}
.player-disc {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    #1a1a1a,
    #2a2a2a,
    #1a1a1a,
    #2a2a2a,
    #1a1a1a
  );
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px #00000080;
  transition: transform 2s linear;
}
.player-disc.spinning {
  animation: spin 3s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.disc-inner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.disc-label {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
}
.player-track-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}
.player-track-name {
  font-weight: 500;
  font-size: 0.9rem;
}
.player-track-time {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}
.player-progress {
  margin-bottom: 16px;
}
.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  width: 0%;
  transition: width 0.1s linear;
}
.progress-handle {
  width: 14px;
  height: 14px;
  background: var(--primary);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity var(--transition);
}
.progress-bar:hover .progress-handle {
  opacity: 1;
}
.player-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.player-btn {
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.player-btn:hover {
  color: var(--primary);
  background: var(--hover-bg);
}
.btn-play {
  width: 52px;
  height: 52px;
  background: var(--primary);
  color: var(--bg);
}
.btn-play:hover {
  background: var(--primary-light);
  color: var(--bg);
}
.player-playlist {
  margin-top: 20px;
}
.playlist-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.playlist-items {
  list-style: none;
}
.playlist-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.9rem;
}
.playlist-item:hover {
  background: var(--hover-bg);
}
.playlist-item.active {
  background: #c9a84c1a;
  color: var(--primary);
}
.playlist-num {
  color: var(--text-muted);
  font-size: 0.8rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}
.playlist-name {
  flex: 1;
}
.video-player-wrapper {
  position: relative;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 24px 0;
}
.video-player {
  width: 100%;
  display: block;
  max-height: 70vh;
}
.video-loading {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  background: #000000b3;
  color: var(--text-muted);
}
.video-loading.active {
  display: flex;
}
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.video-section {
  margin: 24px 0;
}
.video-section h3 {
  font-family: var(--font-heading);
  margin-bottom: 12px;
}
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.blog-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: block;
  color: var(--text);
}
.blog-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.blog-card-image {
  height: 200px;
  background-size: cover;
  background-position: center;
  background-color: var(--border);
}
.blog-card-body {
  padding: 20px;
}
.blog-card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin-bottom: 8px;
}
.blog-card-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  display: block;
  margin-bottom: 8px;
}
.blog-card-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.blog-post {
  max-width: 800px;
}
.post-date {
  display: block;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.post-cover {
  width: 100%;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}
.post-content {
  line-height: 1.8;
}
.post-content p {
  margin-bottom: 16px;
}
.post-media-section {
  margin-top: 32px;
}
.post-video {
  margin-bottom: 24px;
}
.post-video h3 {
  font-family: var(--font-heading);
  margin-bottom: 12px;
}
.post-video-player {
  width: 100%;
  max-height: 500px;
  border-radius: var(--radius-lg);
  background: #000;
}
.post-audio-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.post-audio-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
}
.post-audio-name {
  flex: 1;
  font-size: 0.95rem;
}
.post-audio-item audio {
  height: 36px;
}
.about-block {
  margin-bottom: 48px;
}
.about-block h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 16px;
  color: var(--primary);
}
.about-block p {
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 700px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.feature-icon {
  margin-bottom: 16px;
}
.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.feature-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.about-preview {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.about-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}
.about-content p {
  color: var(--text-muted);
  margin: 16px 0 24px;
}
.contact-grid {
  max-width: 600px;
  margin: 0 auto;
}
.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
}
.contact-card h3 {
  font-family: var(--font-heading);
  margin-bottom: 8px;
  color: var(--primary);
}
.contact-card p {
  color: var(--text-muted);
}
.contact-link {
  font-size: 1.1rem;
  font-weight: 500;
}
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb-link {
  color: var(--text-muted);
}
.breadcrumb-link:hover {
  color: var(--primary);
}
.breadcrumb-sep {
  color: var(--border-light);
}
.breadcrumb-current {
  color: var(--text);
}
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  margin-top: 60px;
}
.staff-decoration {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 0;
}
.staff-decoration .staff-line {
  height: 1px;
  background: var(--border);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding: 48px 0 32px;
}
.footer-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 12px;
}
.footer-subtitle {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 12px;
}
.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 4px;
}
.footer-link {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.footer-link:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.empty-message {
  color: var(--text-muted);
  text-align: center;
  padding: 40px 20px;
  font-style: italic;
}
.back-link {
  margin-top: 24px;
}
.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
  max-width: 600px;
}
.levels-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}
.level-chip {
  display: inline-block;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
}
.level-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.dictation-level {
  margin-bottom: 48px;
}
.level-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.level-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #c9a84c26;
  color: var(--primary);
  font-size: 1.25rem;
  font-weight: 700;
}
.dictation-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.dictation-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.dictation-item:hover {
  background: var(--hover-bg);
}
.dictation-item.playing {
  background: #c9a84c14;
}
.dictation-num {
  color: var(--text-muted);
  font-size: 0.85rem;
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}
.dictation-info {
  flex: 1;
}
.dictation-title {
  font-size: 0.95rem;
  font-weight: 500;
}
.dictation-key {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
  display: inline-block;
}
.dictation-play-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--primary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.dictation-play-btn:hover {
  background: var(--primary);
  color: var(--bg);
  border-color: var(--primary);
}
.library-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  min-height: 400px;
}
.library-sidebar {
  border-right: 1px solid var(--border);
  padding-right: 24px;
}
.sidebar-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar-group {
  margin-bottom: 4px;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: all var(--transition);
}
.sidebar-link:hover {
  background: var(--hover-bg);
  color: var(--text);
}
.sidebar-link.active {
  background: #c9a84c1a;
  color: var(--primary);
}
.sidebar-children {
  padding-left: 24px;
}
.sidebar-child {
  font-size: 0.8rem;
}
.folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.folder-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  transition: all var(--transition);
  text-align: center;
}
.folder-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  color: var(--text);
}
.folder-name {
  font-size: 0.85rem;
}
.file-list {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.file-list-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.file-col-num {
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}
.file-col-name {
  flex: 1;
}
.file-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.file-item:last-child {
  border-bottom: none;
}
.file-item:hover {
  background: var(--hover-bg);
}
.file-item.playing {
  background: #c9a84c14;
}
.file-num {
  color: var(--text-muted);
  font-size: 0.8rem;
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}
.file-name {
  flex: 1;
  font-size: 0.9rem;
}
.file-play-btn {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.file-play-btn:hover {
  background: #c9a84c26;
}
.library-login-wrapper {
  display: flex;
  justify-content: center;
  padding: 60px 0;
}
.library-login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 400px;
  width: 100%;
  text-align: center;
}
.login-icon {
  margin-bottom: 20px;
}
.login-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  margin-bottom: 12px;
}
.login-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}
.login-error {
  background: #cc444426;
  color: var(--danger);
  padding: 10px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.login-input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font-body);
  text-align: center;
}
.login-input:focus {
  outline: none;
  border-color: var(--primary);
}
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: block;
  color: var(--text);
}
.video-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.video-thumb {
  background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
  height: 180px;
  position: relative;
  overflow: hidden;
}
.video-thumb-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}
.video-thumb-overlay {
  position: absolute;
  inset: 0;
  background: #00000059;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.video-card:hover .video-thumb-overlay {
  background: #0003;
}
.video-thumb-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #c9a84ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
  padding-left: 4px;
}
.video-card:hover .video-thumb-icon {
  transform: scale(1.1);
}
.video-card-body {
  padding: 16px;
}
.video-card-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 4px;
}
.video-card-size {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.video-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}
.messenger-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.messenger-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 1rem;
  font-weight: 500;
  transition: color var(--transition);
}
.messenger-link:hover {
  color: var(--primary-light);
}
@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .container {
    padding: 0 16px;
  }
}
@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .hero .container {
    flex-direction: column;
    text-align: center;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-visual {
    display: none;
  }
  .container {
    padding: 0 12px;
  }
  .section {
    padding: 32px 0;
  }
  .page-title {
    font-size: 1.6rem;
  }
  .section-desc {
    font-size: 0.9rem;
  }
  .grades-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }
  .lessons-grid,
  .features-grid,
  .blog-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }
  .lesson-list-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .lesson-meta {
    flex-direction: row;
    align-items: center;
  }
  .library-layout {
    grid-template-columns: 1fr;
  }
  .library-sidebar {
    display: none;
  }
  .folder-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  }
  .file-list-header {
    display: none;
  }
  .file-item {
    padding: 10px 12px;
  }
  .file-num {
    display: none;
  }
  .file-name {
    font-size: 0.85rem;
  }
  .levels-nav {
    gap: 6px;
  }
  .level-chip {
    padding: 6px 14px;
    font-size: 0.8rem;
  }
  .level-title {
    font-size: 1.2rem;
  }
  .dictation-item {
    padding: 10px 12px;
  }
  .dictation-name {
    font-size: 0.85rem;
  }
  .video-thumb {
    height: 200px;
  }
  .video-card-body {
    padding: 12px;
  }
  .pdf-iframe {
    height: 60vh;
  }
  .messenger-links {
    gap: 12px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}
.pdf-embed {
  margin-top: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.pdf-iframe {
  width: 100%;
  height: 85vh;
  border: none;
  display: block;
}
.pdf-download {
  margin-top: 16px;
  text-align: center;
}

/* ===== Quick Access Cards (Home) ===== */
.quick-access-section {
  padding-top: 0;
}
.quick-access-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}
.quick-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 36px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  text-align: center;
}
.quick-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  border-color: var(--primary);
}
.quick-card-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.quick-card-label {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}
.quick-card-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Coming Soon (Уроки) ===== */
.coming-soon-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 80px 24px;
  text-align: center;
  gap: 16px;
}
.coming-soon-icon {
  font-size: 5rem;
  opacity: 0.3;
  line-height: 1;
}
.coming-soon-text {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}
.coming-soon-sub {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ===== Piano Home Section ===== */
.piano-home-section {
  background: var(--surface);
}

/* ===== About Home Section ===== */
.about-home-content {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.about-home-content p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
}

/* ===== Contacts Home Section ===== */
.contacts-home-section {
  background: var(--surface);
}

/* ===== Textbooks ===== */
.textbook-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.textbook-set {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition);
}
.textbook-set:hover {
  border-color: var(--accent);
}
.textbook-cover {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--text);
  text-decoration: none;
}
.textbook-cover-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.textbook-cover-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.textbook-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}
.textbook-author {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.textbook-cover:hover .textbook-title {
  color: var(--accent);
}
.textbook-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 150px;
}
.textbook-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  position: relative;
}
.textbook-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(107, 76, 59, 0.07);
}
.textbook-btn--soon {
  opacity: 0.6;
  pointer-events: none;
}
.soon-badge {
  margin-left: auto;
  font-size: 0.7rem;
  background: var(--border);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 99px;
}
@media (max-width: 600px) {
  .textbook-set {
    grid-template-columns: 1fr;
  }
  .textbook-actions {
    flex-direction: row;
    flex-wrap: wrap;
    min-width: unset;
  }
  .textbook-btn {
    flex: 1;
    justify-content: center;
    min-width: 100px;
  }
}

/* ===== Textbook Video List ===== */
.textbook-video-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.textbook-video-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.textbook-video-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--text);
}

/* ===== Piano Video Hint ===== */
.piano-video-hint {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.piano-video-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin-bottom: 16px;
  color: var(--text-muted);
  text-align: center;
}
.piano-video-player {
  width: 100%;
  border-radius: var(--radius-lg);
  background: #000;
  display: block;
  max-height: 480px;
}

/* ===== Quick Card Text wrapper ===== */
.quick-card-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .quick-access-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .quick-card {
    flex-direction: row;
    text-align: left;
    padding: 18px 20px;
    gap: 16px;
    align-items: center;
  }
  .quick-card-icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
  }
  .quick-card-text {
    justify-content: center;
  }
}

/* ===== Games / Quiz ===== */
.games-hero { padding: 60px 0 40px; }
.games-part {
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.games-part:last-child { border-bottom: none; }
.games-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.games-nav-link {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  transition: all 0.15s;
  white-space: nowrap;
}
.games-nav-link:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.games-nav-empty {
  opacity: 0.4;
  pointer-events: none;
}
.games-part-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.games-part-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  flex-shrink: 0;
}
.games-part-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.games-part-sub { font-size: 0.85rem; color: var(--text-muted); }
.games-empty { color: var(--text-muted); font-style: italic; padding: 8px 0; }
.games-submit-hint { display: flex; align-items: center; gap: 12px; margin-top: 14px; padding: 12px 16px; background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius-lg); color: var(--text-muted); font-size: 14px; flex-wrap: wrap; }
.games-part-students { margin-top: 48px; border-top: 2px dashed var(--border); padding-top: 32px; }
.games-nav-students { border-color: var(--primary); color: var(--primary); font-style: italic; }
.olympiad-actions { margin-bottom: 32px; }
.olympiad-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--surface);
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  color: var(--primary);
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.2s;
}
.olympiad-action-btn:hover {
  background: var(--primary);
  color: #fff;
}
.games-quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.games-quiz-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  text-decoration: none;
  transition: all var(--transition);
}
.games-quiz-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.games-quiz-icon { font-size: 2rem; flex-shrink: 0; }
.games-quiz-info { flex: 1; }
.games-quiz-title { font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
.games-quiz-desc { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 4px; }
.games-quiz-count { font-size: 0.8rem; color: var(--text-muted); }
.games-quiz-arrow { font-size: 1.2rem; color: var(--primary); flex-shrink: 0; }

/* Quiz shell */
.quiz-shell { max-width: 720px; margin: 0 auto; }
.quiz-header { margin-bottom: 28px; }
.quiz-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.quiz-progress-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
.quiz-progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  transition: width 0.5s ease;
  width: 0%;
}
.quiz-progress-label { font-size: 0.85rem; color: var(--text-muted); white-space: nowrap; }
.quiz-question-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  margin-bottom: 20px;
  text-align: center;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.quiz-question-text {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  line-height: 1.5;
  color: var(--text);
}
.quiz-question-image {
  max-width: 100%;
  max-height: 260px;
  border-radius: var(--radius);
  margin-top: 16px;
  object-fit: contain;
}
.quiz-answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.quiz-answer-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 18px 20px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  line-height: 1.4;
}
.quiz-answer-btn:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--surface-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.quiz-answer-btn.correct {
  border-color: #22c55e;
  background: #dcfce7;
  color: #166534;
  animation: quiz-pulse 0.4s ease;
}
.quiz-answer-btn.wrong {
  border-color: #ef4444;
  background: #fee2e2;
  color: #991b1b;
  animation: quiz-shake 0.4s ease;
}
html[data-theme="dark"] .quiz-answer-btn.correct {
  background: #14532d;
  color: #bbf7d0;
  border-color: #22c55e;
}
html[data-theme="dark"] .quiz-answer-btn.wrong {
  background: #450a0a;
  color: #fecaca;
  border-color: #ef4444;
}
.quiz-answer-btn.selected {
  border-color: var(--primary);
  background: var(--primary-alpha, rgba(99,102,241,0.12));
  color: var(--primary);
}
.quiz-multi-hint {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 8px 0 4px;
}
.quiz-check-btn {
  display: block;
  margin: 12px auto 0;
  padding: 12px 32px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}
.quiz-check-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.quiz-explanation {
  margin: 10px 0 4px;
  padding: 10px 14px;
  background: rgba(234, 179, 8, 0.12);
  border-left: 3px solid #eab308;
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.5;
}
html[data-theme="dark"] .quiz-explanation {
  background: rgba(234, 179, 8, 0.08);
}
.quiz-next-btn {
  display: inline-block;
  margin-top: 10px;
  padding: 9px 22px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.quiz-next-btn:hover { opacity: 0.85; }
.quiz-answer-img {
  max-width: 100%;
  max-height: 120px;
  border-radius: var(--radius);
  object-fit: contain;
}
@keyframes quiz-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}
@keyframes quiz-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}
.quiz-counter { text-align: center; color: var(--text-muted); font-size: 0.85rem; }
.quiz-slide-in { animation: quiz-slide 0.35s ease; }
@keyframes quiz-slide {
  from { transform: translateX(50px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* Results */
.quiz-results { text-align: center; padding: 60px 24px; }
.quiz-result-header { margin-bottom: 20px; }
.qr-part { display: block; font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
.qr-title { display: block; font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--text); }
.quiz-stars { font-size: 3rem; margin-bottom: 16px; }
.quiz-score {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.quiz-result-msg { font-size: 1.2rem; color: var(--text-muted); margin-bottom: 32px; }
.quiz-result-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.quiz-send-block { margin: 20px 0; padding: 16px 20px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.quiz-send-label { font-size: 14px; color: var(--text-muted); margin-bottom: 10px; }
.quiz-send-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.quiz-send-input { flex: 1; min-width: 160px; padding: 9px 14px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); color: var(--text); font-size: 14px; }
.quiz-send-input:focus { outline: none; border-color: var(--primary); }
.quiz-send-btn { white-space: nowrap; }
.quiz-sent-ok { color: #16a34a; font-weight: 600; font-size: 15px; }

/* Admin quiz styles */
.quiz-admin-question {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}
.quiz-admin-q-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}
.quiz-admin-q-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: #1a1510;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.quiz-admin-q-text { flex: 1; font-weight: 500; }
.quiz-admin-thumb { height: 48px; border-radius: 4px; object-fit: cover; }
.quiz-admin-q-actions { display: flex; gap: 6px; flex-shrink: 0; }
.quiz-admin-answers { display: flex; flex-direction: column; gap: 6px; padding-left: 40px; }
.quiz-admin-answer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg);
  border-radius: var(--radius);
  font-size: 0.9rem;
}
.quiz-admin-answer-correct { font-weight: 700; width: 20px; flex-shrink: 0; }
.quiz-admin-answer-correct.yes { color: #22c55e; }
.quiz-admin-answer-correct.no  { color: #ef4444; }
.quiz-admin-answer-text { flex: 1; }
.quiz-admin-add-answer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 12px;
  padding-left: 40px;
  background: var(--bg);
  border-radius: var(--radius);
  margin-top: 8px;
}
.admin-inline-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  color: var(--text);
  font-size: 0.9rem;
  flex: 1;
  min-width: 180px;
}
.admin-inline-check {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  cursor: pointer;
}

/* Media display name edit */
.media-display-name-input {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 4px 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  width: 100%;
  transition: border-color 0.2s;
}
.media-display-name-input:hover,
.media-display-name-input:focus {
  border-color: var(--primary);
  background: var(--bg);
  outline: none;
}
.media-original-name {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  display: block;
}

@media (max-width: 768px) {
  .quiz-answers { grid-template-columns: 1fr; }
  .quiz-question-text { font-size: 1.1rem; }
  .games-quiz-grid { grid-template-columns: 1fr; }
  .quiz-admin-add-answer { padding-left: 12px; }
  .quiz-admin-answers { padding-left: 12px; }
}

/* ─── Timer ───────────────────────────────────────────────────── */
.quiz-timer {
  font-family: var(--font-body);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  min-width: 48px;
  text-align: right;
}
.quiz-result-time {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 4px 0 8px;
}
.quiz-points-earned {
  background: linear-gradient(135deg, #4a8, #3a7);
  color: #fff;
  border-radius: var(--radius);
  padding: 10px 18px;
  font-size: 1rem;
  font-weight: 600;
  margin: 12px 0;
  text-align: center;
}
.quiz-lb-check {
  margin: 8px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.badge-olympiad {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  border-radius: 4px;
  padding: 1px 5px;
  margin-left: 6px;
  vertical-align: middle;
}

/* ─── Auth / Account ─────────────────────────────────────────── */
.auth-card {
  max-width: 440px;
  margin: 40px auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow);
}
.auth-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  margin-bottom: 20px;
  text-align: center;
}
.auth-error {
  background: #fde8e8;
  border: 1px solid #e55;
  color: #c00;
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}
html[data-theme="dark"] .auth-error { background: #3a1515; border-color: #c44; color: #f88; }
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-field { display: flex; flex-direction: column; gap: 6px; }
.auth-field label { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }
.auth-hint { font-weight: 400; font-size: 0.8rem; }
.auth-field input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color var(--transition);
}
.auth-field input:focus { outline: none; border-color: var(--primary); }
.auth-submit { margin-top: 8px; width: 100%; }
.auth-alt { text-align: center; margin-top: 14px; font-size: 0.9rem; color: var(--text-muted); }
.auth-alt a { color: var(--primary); text-decoration: none; }
.auth-alt a:hover { text-decoration: underline; }
.auth-anonymous { font-size: 0.82rem; }
.nav-link-account { font-weight: 600; }

/* ─── Profile ────────────────────────────────────────────────── */
.profile-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.profile-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.profile-name { font-family: var(--font-heading); font-size: 1.6rem; margin-bottom: 4px; }
.profile-meta { color: var(--text-muted); font-size: 0.9rem; }
.profile-stats-row {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.profile-stat-card {
  flex: 1;
  min-width: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.profile-stat-val {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-heading);
}
.profile-section { margin-bottom: 32px; }
.profile-section-title { font-family: var(--font-heading); font-size: 1.3rem; margin-bottom: 14px; }
.profile-empty { color: var(--text-muted); }
.profile-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.attempts-table-wrap { overflow-x: auto; }
.attempts-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.attempts-table th, .attempts-table td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.attempts-table th { font-weight: 600; color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.attempts-points { color: var(--success); font-weight: 600; }

/* ─── Leaderboard ────────────────────────────────────────────── */
.lb-header { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.lb-title { font-family: var(--font-heading); font-size: 1.8rem; }
.lb-table-wrap { overflow-x: auto; }
.lb-table { width: 100%; border-collapse: collapse; }
.lb-table th, .lb-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.lb-table th { color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.lb-rank { font-size: 1.3rem; width: 48px; }
.lb-name { font-weight: 600; }
.lb-gold { background: rgba(201, 168, 76, 0.08); }
.lb-silver { background: rgba(180, 180, 200, 0.08); }
.lb-bronze { background: rgba(180, 120, 60, 0.06); }

/* Home leaderboard block */
.home-leaderboard-section { padding: 40px 0; }
.home-lb-list { max-width: 480px; margin: 0 auto 16px; }
.home-lb-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}
.home-lb-item:last-child { border-bottom: none; }
.home-lb-rank { font-size: 1.2rem; width: 32px; }
.home-lb-name { flex: 1; font-weight: 500; }
.home-lb-pts { color: var(--primary); font-weight: 700; }

/* ─── Battles ────────────────────────────────────────────────── */
.battles-create-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
}
.battles-section { margin-bottom: 32px; }
.battles-section-title { font-family: var(--font-heading); font-size: 1.3rem; margin-bottom: 14px; }
.battles-create-form { margin-top: 16px; }
.battles-form-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.battles-form-group { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 200px; }
.battles-form-group label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.battles-select {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font-body);
}
.battles-list { display: flex; flex-direction: column; gap: 12px; }
.battle-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.battle-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.battle-quiz-name { font-weight: 600; color: var(--text); }
.battle-status-badge {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 20px;
  font-weight: 600;
}
.battle-badge-pending  { background: rgba(201, 168, 76, 0.15); color: var(--primary); }
.battle-badge-accepted { background: rgba(74, 136, 0, 0.12); color: var(--success); }
.battle-badge-completed { background: rgba(0, 0, 0, 0.08); color: var(--text-muted); }
.battle-badge-declined  { background: rgba(200, 60, 60, 0.1); color: var(--danger); }
.battle-card-players { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; font-size: 0.95rem; }
.battle-vs { color: var(--primary); font-weight: 700; font-size: 1.1rem; }
.battle-me { font-weight: 700; color: var(--primary); }
.battle-result { font-size: 0.85rem; color: var(--text-muted); display: flex; flex-direction: column; gap: 2px; margin-bottom: 8px; }
.battle-card-actions { margin-top: 10px; display: flex; gap: 8px; }
.games-nav-battles { background: rgba(201, 168, 76, 0.15); }

/* ─── Piano recording ────────────────────────────────────────── */
.piano-recording-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 14px 16px;
  margin-top: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.btn-record {
  background: #e03030;
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background var(--transition);
}
.btn-record:hover:not(:disabled) { background: #c02020; }
.btn-record:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-record-stop {
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background var(--transition);
}
.btn-record-stop:hover:not(:disabled) { opacity: 0.8; }
.btn-record-stop:disabled { opacity: 0.35; cursor: not-allowed; }
.piano-rec-indicator {
  color: #e03030;
  font-weight: 700;
  font-size: 0.9rem;
  animation: rec-blink 1s infinite;
}
@keyframes rec-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Admin stat card */
.admin-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  min-width: 100px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.admin-stat-card .stat-val {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-heading);
}

/* ===== Form inputs (used in quiz-submit, events-submit, etc.) ===== */
.form-input,
.admin-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-sizing: border-box;
}
.form-input:focus,
.admin-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(201,168,76,0.15);
}
.form-input::placeholder,
.admin-input::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}
.form-label,
.admin-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

/* ===== Games Feature Cards ===== */
.games-feature-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}
.games-feature-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 20px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
  font-weight: 600;
}
.games-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}
.games-feature-events:hover   { border-color: #6366f1; background: rgba(99,102,241,0.06); }
.games-feature-students:hover { border-color: #c9a84c; background: rgba(201,168,76,0.06); }
.games-feature-battles:hover  { border-color: #e85d04; background: rgba(232,93,4,0.06); }
.games-feature-olympiad:hover { border-color: #16a34a; background: rgba(34,197,94,0.06); }
.games-feature-icon  { font-size: 2.4rem; flex-shrink: 0; }
.games-feature-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 4px; }
.games-feature-desc  { font-size: 0.82rem; color: var(--text-muted); font-weight: 400; }

@media (max-width: 768px) {
  .games-feature-cards { grid-template-columns: 1fr; gap: 12px; }
  .games-feature-card { padding: 16px; }
}

/* ===== Events (Sapphires) System ===== */
.events-hero { padding: 60px 0 40px; }
.events-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; margin-top: 24px; }
.event-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
}
.event-card:hover { border-color: #6366f1; transform: translateY(-2px); }
.event-card-status {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.event-status-active   { background: rgba(34,197,94,0.15); color: #16a34a; }
.event-status-upcoming { background: rgba(99,102,241,0.15); color: #4f46e5; }
.event-status-completed{ background: rgba(107,114,128,0.15); color: #6b7280; }
.event-card-title { font-size: 1.1rem; font-weight: 700; }
.event-card-dates { font-size: 0.82rem; color: var(--text-muted); }
.event-card-meta  { font-size: 0.85rem; color: var(--text-muted); }

.event-sapphire-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(99,102,241,0.12);
  color: #4f46e5;
  border-radius: 12px;
  padding: 3px 10px;
  font-size: 0.85rem;
  font-weight: 700;
}

.event-submissions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.event-sub-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text);
}
.event-sub-title { font-weight: 700; font-size: 1rem; }
.event-sub-author { font-size: 0.82rem; color: var(--text-muted); }
.event-sub-meta   { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 12px; flex-wrap: wrap; }
.event-sub-actions { display: flex; gap: 8px; margin-top: 4px; flex-wrap: wrap; }

.star-rating { display: flex; gap: 4px; }
.star-btn {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--border);
  transition: color var(--transition);
  padding: 0;
  line-height: 1;
}
.star-btn.active, .star-btn:hover { color: #f59e0b; }

/* ===== Notifications ===== */
.notif-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  background: #e85d04;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0 4px;
  vertical-align: middle;
  margin-left: 4px;
}
.notif-list { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.notif-item {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  background: var(--surface);
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.notif-item.unread { border-color: var(--primary); background: rgba(201,168,76,0.06); }
.notif-item-body { flex: 1; }
.notif-item-title { font-weight: 700; font-size: 0.9rem; margin-bottom: 3px; }
.notif-item-text  { font-size: 0.82rem; color: var(--text-muted); }
.notif-item-date  { font-size: 0.75rem; color: var(--text-muted); flex-shrink: 0; margin-top: 2px; }

/* ===== Instructions page ===== */
.instructions-content {
  max-width: 780px;
  margin: 0 auto;
}
.instructions-content h2 { margin-top: 36px; margin-bottom: 12px; }
.instructions-content h3 { margin-top: 24px; margin-bottom: 8px; color: var(--primary); }
.instructions-content p  { margin-bottom: 12px; line-height: 1.7; }
.instructions-content ul { padding-left: 24px; margin-bottom: 12px; }
.instructions-content ul li { margin-bottom: 6px; line-height: 1.6; }

/* ===== License note in footer ===== */
.footer-license {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}
.footer-license a { color: var(--text-muted); text-decoration: underline; }

@media (max-width: 600px) {
  .profile-stats-row { flex-direction: column; }
  .battles-form-row { flex-direction: column; }
  .profile-header { flex-direction: column; text-align: center; }
  .piano-recording-bar { flex-direction: column; align-items: flex-start; }
}