:root {
  --bg-base: #f4f7fb;
  --bg-panel: rgba(255, 255, 255, 0.82);
  --text-strong: #0f1d3a;
  --text-soft: #4e5e7e;
  --line: rgba(17, 34, 64, 0.12);
  --line-soft: rgba(17, 34, 64, 0.08);
  --brand: #ff7a18;
  --brand-deep: #d94d00;
  --brand-cool: #0b7285;
  --shadow-xl: 0 22px 50px rgba(14, 33, 63, 0.16);
  --shadow-lg: 0 12px 28px rgba(14, 33, 63, 0.13);
  --radius-lg: 24px;
  --radius-md: 16px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg-base: #0b1220;
  --bg-panel: rgba(13, 20, 36, 0.86);
  --text-strong: #edf3ff;
  --text-soft: #a9b6d0;
  --line: rgba(173, 190, 221, 0.16);
  --line-soft: rgba(173, 190, 221, 0.1);
  --brand: #ff9d4d;
  --brand-deep: #ff6a00;
  --brand-cool: #73d0e6;
  --shadow-xl: 0 24px 54px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 14px 28px rgba(0, 0, 0, 0.26);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Plus Jakarta Sans", sans-serif;
  color: var(--text-strong);
  background:
    radial-gradient(1200px 450px at -5% -5%, rgba(255, 122, 24, 0.2), transparent 65%),
    radial-gradient(920px 420px at 110% -8%, rgba(11, 114, 133, 0.2), transparent 65%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg-base) 100%);
}

html[data-theme="dark"] body {
  background:
    radial-gradient(900px 380px at -8% -4%, rgba(255, 157, 77, 0.18), transparent 60%),
    radial-gradient(760px 340px at 108% 2%, rgba(115, 208, 230, 0.16), transparent 58%),
    linear-gradient(180deg, #10192a 0%, var(--bg-base) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(15, 29, 58, 0.02) 1px, transparent 1px),
    linear-gradient(rgba(15, 29, 58, 0.02) 1px, transparent 1px);
  background-size: 42px 42px;
  z-index: -1;
}

.page-wrap {
  width: min(1180px, 92vw);
  margin: 0 auto;
  padding: 2rem 0 3.2rem;
}

.hero,
.student-hero,
.form-card {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
}

.hero {
  padding: clamp(1.1rem, 2.2vw, 2rem);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  width: 180px;
  aspect-ratio: 1;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255, 122, 24, 0.22), rgba(11, 114, 133, 0.18));
  right: -35px;
  top: -40px;
  filter: blur(1px);
}

.eyebrow {
  margin: 0;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-cool);
  font-weight: 800;
}

.hero-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.topbar-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.sheet-status {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.38rem 0.68rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-soft);
}

.sheet-dot {
  width: 0.52rem;
  height: 0.52rem;
  border-radius: 50%;
  background: #d94d00;
}

.sheet-status.connected .sheet-dot {
  background: #16a34a;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.48rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.78rem;
  background: var(--bg-panel);
  color: var(--text-strong);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.theme-logo {
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 50%;
  background: conic-gradient(from 220deg, var(--brand), var(--brand-cool), var(--brand));
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.55);
}

.theme-toggle[data-mode="dark"] .theme-logo {
  background: radial-gradient(circle at 34% 36%, #f8d06b 0 26%, #1e2a45 29% 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.theme-toggle[data-mode="light"] .theme-logo {
  background: radial-gradient(circle at 50% 50%, #ffd166 0 45%, #ff9f1c 50% 100%);
}

.theme-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(255, 122, 24, 0.18);
}

html[data-theme="dark"] .theme-toggle,
html[data-theme="dark"] .search-input,
html[data-theme="dark"] .suggest-form input,
html[data-theme="dark"] .song-card {
  background: rgba(10, 17, 30, 0.92);
}

html[data-theme="dark"] .song-card,
html[data-theme="dark"] .student-card,
html[data-theme="dark"] .hero,
html[data-theme="dark"] .student-hero,
html[data-theme="dark"] .form-card {
  border-color: rgba(173, 190, 221, 0.14);
}

html[data-theme="dark"] .student-card {
  background: linear-gradient(160deg, rgba(18, 30, 52, 0.96), rgba(11, 20, 36, 0.94));
}

html[data-theme="dark"] .student-card h3 {
  color: #edf3ff;
}

html[data-theme="dark"] .student-card .roll {
  color: #ffb57a;
}

html[data-theme="dark"] .search-input::placeholder,
html[data-theme="dark"] .suggest-form input::placeholder {
  color: rgba(169, 182, 208, 0.72);
}

html[data-theme="dark"] .download-btn {
  border-color: rgba(173, 190, 221, 0.18);
  color: #ffb57a;
}

html[data-theme="dark"] .download-btn:hover,
html[data-theme="dark"] .download-btn:focus-visible {
  background: rgba(255, 157, 77, 0.12);
}

html[data-theme="dark"] .form-error {
  background: rgba(59, 17, 17, 0.9);
  border-color: rgba(248, 113, 113, 0.3);
  color: #fecaca;
}

html[data-theme="dark"] .play-btn {
  box-shadow: none;
}

h1 {
  margin: 0.6rem 0 0.65rem;
  font-family: "Sora", sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.45rem);
  line-height: 1.2;
}

.subtitle {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.6;
  max-width: 80ch;
}

.search-row {
  margin-top: 1.2rem;
}

.search-input,
.suggest-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--text-strong);
  padding: 0.82rem 0.95rem;
  font: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.search-input:focus,
.suggest-form input:focus {
  outline: none;
  border-color: rgba(255, 122, 24, 0.8);
  box-shadow: 0 0 0 4px rgba(255, 122, 24, 0.12);
  transform: translateY(-1px);
}

.result-count {
  margin: 1.1rem 0;
  color: var(--text-soft);
  font-weight: 700;
}

.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.student-card {
  padding: 1.05rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.98), rgba(245, 248, 255, 0.92));
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  animation: fadeSlideIn 0.4s ease both;
}

.student-card:hover,
.student-card:focus-visible {
  transform: translateY(-6px);
  border-color: rgba(255, 122, 24, 0.42);
  box-shadow: 0 20px 30px rgba(12, 28, 56, 0.18);
  outline: none;
}

.student-card h3 {
  margin: 0;
  font-size: 1.01rem;
  line-height: 1.35;
}

.student-card .roll {
  margin: 0.42rem 0 0;
  font-weight: 800;
  color: var(--brand-deep);
}

.detail-page {
  display: grid;
  gap: 1rem;
}

.back-link {
  width: fit-content;
  text-decoration: none;
  color: var(--brand-cool);
  font-weight: 800;
}

.back-link:hover {
  text-decoration: underline;
}

.student-hero,
.form-card {
  padding: clamp(1rem, 2.5vw, 1.4rem);
}

.roll-pill {
  width: fit-content;
  margin: 0;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand), var(--brand-deep));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 800;
}

.section-title,
.form-card h2 {
  margin: 0 0 0.85rem;
  font-family: "Sora", sans-serif;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
}

.suggest-form {
  display: grid;
  gap: 0.78rem;
}

.form-error {
  margin: 0 0 0.7rem;
  padding: 0.72rem 0.85rem;
  border-radius: 12px;
  border: 1px solid rgba(185, 28, 28, 0.28);
  background: rgba(254, 242, 242, 0.95);
  color: #b91c1c;
  font-weight: 700;
  line-height: 1.4;
}

.form-success {
  margin: 0 0 0.7rem;
  padding: 0.72rem 0.85rem;
  border-radius: 12px;
  border: 1px solid rgba(22, 163, 74, 0.24);
  background: rgba(240, 253, 244, 0.96);
  color: #166534;
  font-weight: 700;
  line-height: 1.4;
}

html[data-theme="dark"] .form-success {
  background: rgba(15, 46, 29, 0.94);
  border-color: rgba(74, 222, 128, 0.24);
  color: #bbf7d0;
}

.suggest-form label {
  display: grid;
  gap: 0.34rem;
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-soft);
}

.drop-zone {
  position: relative;
  border: 1px dashed rgba(255, 122, 24, 0.45);
  border-radius: 12px;
  background: rgba(255, 122, 24, 0.06);
  padding: 0.9rem;
  min-height: 96px;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.drop-zone-title {
  margin: 0;
  color: var(--text-strong);
  font-size: 0.9rem;
  font-weight: 700;
}

.drop-zone-file {
  margin: 0.32rem 0 0;
  color: var(--text-soft);
  font-size: 0.82rem;
  font-weight: 600;
}

.drop-zone.is-dragging {
  border-color: var(--brand-deep);
  background: rgba(255, 122, 24, 0.14);
  transform: translateY(-1px);
}

html[data-theme="dark"] .drop-zone {
  border-color: rgba(255, 181, 122, 0.38);
  background: rgba(255, 157, 77, 0.09);
}

html[data-theme="dark"] .drop-zone.is-dragging {
  border-color: #ffb57a;
  background: rgba(255, 157, 77, 0.18);
}

.suggest-form button {
  border: 0;
  border-radius: 13px;
  padding: 0.78rem 1rem;
  font: inherit;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(90deg, var(--brand), var(--brand-deep));
  box-shadow: 0 10px 18px rgba(217, 77, 0, 0.28);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.suggest-form button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 20px rgba(217, 77, 0, 0.34);
}

.song-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

#suggestedSongsSection {
  scroll-margin-top: 1rem;
}

.song-card {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: #fff;
  box-shadow: var(--shadow-lg);
}

.song-card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  display: block;
}

.song-meta {
  padding: 0.78rem;
  display: grid;
  gap: 0.58rem;
}

.song-title {
  font-weight: 800;
  line-height: 1.35;
}

.player-wrap {
  display: grid;
  gap: 0.5rem;
}

.media-player {
  width: 100%;
  max-height: 280px;
  border-radius: 14px;
  background: #000;
}

.media-embed {
  width: 100%;
  min-height: 232px;
  border: 0;
  border-radius: 14px;
  background: #000;
}

.song-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.play-btn {
  width: fit-content;
  border: 0;
  border-radius: 999px;
  padding: 0.42rem 0.86rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--brand-cool), #0a5a69);
  color: #fff;
  cursor: pointer;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.42rem 0.86rem;
  border: 1px solid rgba(255, 122, 24, 0.22);
  background: rgba(255, 122, 24, 0.08);
  color: var(--brand-deep);
  font-size: 0.85rem;
  font-weight: 800;
  text-decoration: none;
}

.download-btn:hover,
.download-btn:focus-visible {
  background: rgba(255, 122, 24, 0.08);
  outline: none;
}

audio {
  width: 100%;
  height: 34px;
}

video {
  width: 100%;
}

.no-song,
.no-results {
  margin: 0;
  color: var(--text-soft);
}

.success-popup {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(7, 12, 24, 0.62);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s ease, visibility 0.28s ease;
}

.success-popup.is-visible {
  opacity: 1;
  visibility: visible;
}

.success-popup-card {
  position: relative;
  width: min(92vw, 540px);
  overflow: hidden;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background:
    radial-gradient(circle at top right, rgba(255, 122, 24, 0.34), transparent 42%),
    radial-gradient(circle at bottom left, rgba(11, 114, 133, 0.24), transparent 36%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.98), rgba(246, 249, 255, 0.92));
  box-shadow: 0 28px 70px rgba(5, 14, 30, 0.38);
  padding: clamp(1.25rem, 3vw, 2rem);
  text-align: center;
  transform: translateY(18px) scale(0.94);
  animation: popupRise 0.62s cubic-bezier(0.2, 0.9, 0.2, 1) forwards;
  cursor: pointer;
}

.success-popup-card::before {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 22px;
  border: 1px solid rgba(255, 122, 24, 0.1);
  pointer-events: none;
}

.success-popup-card::after {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 24, 0.18) 0%, transparent 66%);
  top: -120px;
  right: -100px;
  animation: popupGlow 4.5s ease-in-out infinite;
  pointer-events: none;
}

.success-popup-eyebrow {
  position: relative;
  z-index: 1;
  margin: 0 0 0.7rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 900;
  color: var(--brand-cool);
}

.success-popup h2 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: "Sora", sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.15;
}

.success-popup-message {
  position: relative;
  z-index: 1;
  margin: 0.85rem 0 0;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.6;
}

.success-popup-note {
  position: relative;
  z-index: 1;
  margin: 1rem 0 0;
  font-weight: 800;
  color: var(--brand-deep);
}

html[data-theme="dark"] .success-popup {
  background: rgba(3, 8, 16, 0.74);
}

html[data-theme="dark"] .success-popup-card {
  border-color: rgba(173, 190, 221, 0.18);
  background:
    radial-gradient(circle at top right, rgba(255, 157, 77, 0.2), transparent 42%),
    radial-gradient(circle at bottom left, rgba(115, 208, 230, 0.18), transparent 36%),
    linear-gradient(160deg, rgba(18, 30, 52, 0.98), rgba(11, 20, 36, 0.96));
}

html[data-theme="dark"] .success-popup-message {
  color: #c7d5f2;
}

html[data-theme="dark"] .success-popup-note {
  color: #ffb57a;
}

@keyframes popupRise {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.9);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes popupGlow {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.55;
  }

  50% {
    transform: scale(1.1);
    opacity: 0.9;
  }
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .page-wrap {
    width: min(1180px, 94vw);
  }

  .song-card img {
    height: 170px;
  }
}

@media (max-width: 600px) {
  .page-wrap {
    padding: 1.1rem 0 2rem;
  }

  .hero,
  .student-hero,
  .form-card {
    border-radius: 18px;
  }

  .student-grid {
    grid-template-columns: 1fr;
  }

  .song-grid {
    grid-template-columns: 1fr;
  }

  .hero-topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
    justify-content: space-between;
  }

  .success-popup-card {
    width: min(92vw, 480px);
    border-radius: 24px;
  }
}