/* Theme layer for /mon pages: mint default + neon override */

:root {
  --mon-mint-bg: #f2fffb;
  --mon-mint-hero-top: #eefef9;
  --mon-mint-hero-bottom: #ddf8f0;
  --mon-mint-surface: #ffffff;
  --mon-mint-surface-soft: #f7fcfd;
  --mon-mint-border: rgba(15, 118, 110, 0.14);
  --mon-mint-border-strong: rgba(15, 118, 110, 0.24);
  --mon-mint-ink: #0f172a;
  --mon-mint-ink-soft: #334155;
  --mon-mint-accent: #0f766e;
  --mon-mint-accent-2: #16b8a6;
  --mon-mint-glow: 0 18px 44px rgba(13, 118, 110, 0.12);

  --mon-neon-bg-1: #030914;
  --mon-neon-bg-2: #07182a;
  --mon-neon-surface: rgba(7, 18, 31, 0.97);
  --mon-neon-surface-soft: rgba(10, 25, 40, 0.99);
  --mon-neon-border: rgba(64, 255, 233, 0.24);
  --mon-neon-border-strong: rgba(124, 255, 244, 0.58);
  --mon-neon-ink: #f5fffe;
  --mon-neon-ink-soft: #cceefe;
  --mon-neon-accent: #52fff0;
  --mon-neon-accent-2: #7ca0ff;
  --mon-neon-shadow: 0 24px 62px rgba(0, 0, 0, 0.34);
}

body {
  background:
    radial-gradient(circle at top, rgba(34, 197, 94, 0.06), transparent 26%),
    linear-gradient(180deg, var(--mon-mint-bg) 0%, #f7fbfd 100%);
}

.hero-band--mint {
  background:
    radial-gradient(circle at top, rgba(34, 197, 94, 0.12), transparent 28%),
    linear-gradient(180deg, var(--mon-mint-hero-top) 0%, var(--mon-mint-hero-bottom) 100%);
}

.hero-band--mint .hero-band__text h1,
.hero-band--mint .hero-band__text p,
.ktpl-hero-line h1,
.ktpl-hero-line p {
  color: var(--mon-mint-ink);
}

.hero-band--mint .hero-band__text p,
.ktpl-hero-line p {
  color: var(--mon-mint-accent);
  opacity: 0.96;
  font-weight: 700;
}

.hero-band__back,
.hero-back-btn {
  background: rgba(255, 255, 255, 0.94);
  color: var(--mon-mint-accent);
  border: 2px solid rgba(15, 118, 110, 0.26);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.hero-band__back:hover,
.hero-back-btn:hover {
  background: #ffffff;
  border-color: rgba(15, 118, 110, 0.42);
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.12);
}

.lesson-title--pill {
  color: var(--mon-mint-ink);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(240, 255, 250, 0.72));
  border-color: rgba(15, 118, 110, 0.16);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

.subject-card {
  background: linear-gradient(180deg, var(--mon-mint-surface) 0%, var(--mon-mint-surface-soft) 100%);
  border: 1px solid var(--mon-mint-border);
  box-shadow: var(--mon-mint-glow);
  color: var(--mon-mint-ink);
}

.subject-card h2,
.subject-card h3,
.subject-card p,
.subject-card small,
.subject-subtitle,
.subject-meta {
  color: var(--mon-mint-ink);
}

.subject-meta {
  color: var(--mon-mint-ink-soft);
}

.subject-card .btn {
  color: #ffffff;
  background: linear-gradient(180deg, #16948b, #0f766e);
  box-shadow: 0 12px 26px rgba(15, 118, 110, 0.22);
}

.subject-card .btn:hover {
  filter: brightness(1.03);
}

.btn-ghost-sm {
  color: var(--mon-mint-accent);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(15, 118, 110, 0.24);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.06);
}

.btn-ghost-sm:hover {
  background: #ffffff;
  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.08);
}

.lesson-content {
  background: linear-gradient(180deg, var(--mon-mint-surface) 0%, #fbfdff 100%);
  border: 1px solid var(--mon-mint-border);
  box-shadow: 0 24px 54px rgba(15, 23, 42, 0.08);
  color: var(--mon-mint-ink);
}

.lesson-content h2,
.lesson-content h3,
.lesson-content h4 {
  color: var(--mon-mint-ink);
}

.lesson-content h2::before {
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.14), rgba(34, 197, 94, 0.22));
  color: var(--mon-mint-accent);
  border: 1px solid rgba(15, 118, 110, 0.18);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.lesson-content h3::before {
  background: rgba(15, 118, 110, 0.08);
  color: var(--mon-mint-accent);
  border: 1px solid rgba(15, 118, 110, 0.15);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.lesson-content p,
.lesson-content li,
.lesson-content td,
.lesson-content th,
.lesson-content small,
.lesson-content span {
  color: var(--mon-mint-ink-soft);
}

.lesson-content li::marker {
  color: var(--mon-mint-accent-2);
}

.lesson-content a,
.term,
.lesson-content strong {
  color: var(--mon-mint-accent);
}

.lesson-content em {
  color: var(--mon-mint-ink);
}

.note,
.warning,
.tip,
.definition,
.example,
blockquote,
.de-bai {
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.06);
}

.definition,
.example,
blockquote {
  background: rgba(249, 251, 252, 0.98);
  border-color: rgba(226, 232, 240, 0.96);
}

.note {
  background: linear-gradient(180deg, #ecfdf5, #e7fff6);
  border-color: rgba(74, 222, 128, 0.24);
}

.tip {
  background: linear-gradient(180deg, #eef6ff, #eaf2ff);
  border-color: rgba(96, 165, 250, 0.22);
}

.warning {
  background: linear-gradient(180deg, #fff7ed, #fff0dd);
  border-color: rgba(245, 158, 11, 0.26);
}

.de-bai {
  background: linear-gradient(180deg, #f2fffb, #ebfffa);
  border-color: rgba(15, 118, 110, 0.18);
}

.de-bai__title {
  color: var(--mon-mint-accent);
}

.lesson-content table,
.lesson-content .ktpl-data-table {
  background: linear-gradient(180deg, #ffffff 0%, #f8fcff 100%);
  border: 1px solid var(--mon-mint-border);
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.08);
}

.lesson-content thead th {
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.12), rgba(15, 118, 110, 0.18));
  color: var(--mon-mint-ink);
  border-bottom: 1px solid rgba(15, 118, 110, 0.16);
}

.lesson-content td {
  color: #1f2937;
  background: #ffffff;
  border-top: 1px solid rgba(226, 232, 240, 0.95);
}

.lesson-content tbody tr:nth-child(even) td {
  background: #f8fafc;
}

.lesson-content tbody tr:hover td {
  background: rgba(236, 253, 245, 0.9);
}

.caption {
  color: var(--mon-mint-ink-soft);
}

pre {
  background: #071423;
  color: #eff8ff;
}

body.theme-neon {
  color-scheme: dark;
  background:
    radial-gradient(circle at 12% 0%, rgba(82, 255, 240, 0.08), transparent 24%),
    radial-gradient(circle at 88% 12%, rgba(124, 160, 255, 0.1), transparent 22%),
    linear-gradient(180deg, var(--mon-neon-bg-1) 0%, var(--mon-neon-bg-2) 100%);
}

body.theme-neon .hero-band--mint {
  background:
    radial-gradient(circle at 16% 20%, rgba(82, 255, 240, 0.18), transparent 20%),
    radial-gradient(circle at 84% 18%, rgba(124, 160, 255, 0.18), transparent 22%),
    radial-gradient(circle at 50% 66%, rgba(255, 84, 214, 0.08), transparent 26%),
    linear-gradient(180deg, var(--mon-neon-bg-1) 0%, var(--mon-neon-bg-2) 100%);
}

body.theme-neon .hero-band--mint .hero-band__text h1,
body.theme-neon .hero-band--mint .hero-band__text p,
body.theme-neon .ktpl-hero-line h1,
body.theme-neon .ktpl-hero-line p {
  color: var(--mon-neon-ink);
  text-shadow:
    0 2px 14px rgba(0, 0, 0, 0.45),
    0 0 18px rgba(82, 255, 240, 0.18);
}

body.theme-neon .hero-band__back,
body.theme-neon .hero-back-btn {
  background: rgba(8, 24, 38, 0.9);
  color: var(--mon-neon-accent);
  border-color: var(--mon-neon-border-strong);
  box-shadow:
    0 14px 28px rgba(0, 0, 0, 0.26),
    0 0 0 1px rgba(82, 255, 240, 0.12) inset;
}

body.theme-neon .lesson-title--pill {
  color: var(--mon-neon-ink);
  background: linear-gradient(180deg, rgba(8, 24, 38, 0.72), rgba(10, 28, 44, 0.54));
  border-color: rgba(82, 255, 240, 0.18);
  box-shadow:
    0 10px 26px rgba(0, 0, 0, 0.22),
    0 0 0 1px rgba(82, 255, 240, 0.1) inset;
}

body.theme-neon .subject-card {
  background: linear-gradient(180deg, rgba(9, 22, 36, 0.98) 0%, rgba(12, 30, 48, 0.98) 100%);
  border-color: rgba(64, 255, 233, 0.18);
  box-shadow:
    var(--mon-neon-shadow),
    0 0 0 1px rgba(64, 255, 233, 0.08) inset;
}

body.theme-neon .subject-card h2,
body.theme-neon .subject-card h3,
body.theme-neon .subject-card p,
body.theme-neon .subject-card small,
body.theme-neon .subject-subtitle,
body.theme-neon .subject-meta {
  color: var(--mon-neon-ink);
}

body.theme-neon .subject-meta {
  color: var(--mon-neon-ink-soft);
}

body.theme-neon .subject-card .btn {
  color: #041723;
  background: linear-gradient(180deg, #4ffff0, #5297ff);
  box-shadow:
    0 14px 28px rgba(82, 151, 255, 0.24),
    0 0 0 1px rgba(82, 255, 240, 0.16) inset;
}

body.theme-neon .btn-ghost-sm {
  color: var(--mon-neon-accent);
  background: rgba(8, 24, 38, 0.78);
  border-color: rgba(82, 255, 240, 0.22);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

body.theme-neon .lesson-content {
  background:
    radial-gradient(circle at top left, rgba(82, 255, 240, 0.06), transparent 30%),
    radial-gradient(circle at bottom right, rgba(124, 160, 255, 0.08), transparent 26%),
    linear-gradient(180deg, var(--mon-neon-surface) 0%, var(--mon-neon-surface-soft) 100%);
  color: var(--mon-neon-ink);
  border-color: var(--mon-neon-border);
  box-shadow: var(--mon-neon-shadow);
}

body.theme-neon .lesson-content h2,
body.theme-neon .lesson-content h3,
body.theme-neon .lesson-content h4 {
  color: #9ffdf7;
  text-shadow:
    0 0 20px rgba(82, 255, 240, 0.18),
    0 0 30px rgba(124, 160, 255, 0.08);
}

body.theme-neon .lesson-content h2::before {
  background: linear-gradient(135deg, rgba(110, 255, 244, 0.98), rgba(115, 187, 255, 0.86));
  color: #04161d;
  border: 1px solid rgba(210, 255, 251, 0.82);
  box-shadow:
    0 14px 30px rgba(0, 0, 0, 0.26),
    0 0 0 1px rgba(210, 255, 251, 0.42) inset,
    0 0 26px rgba(82, 255, 240, 0.24);
}

body.theme-neon .lesson-content h3::before {
  background: linear-gradient(135deg, rgba(82, 255, 240, 0.18), rgba(124, 160, 255, 0.24));
  color: #dffffb;
  border: 1px solid rgba(82, 255, 240, 0.28);
  box-shadow:
    0 10px 22px rgba(0, 0, 0, 0.2),
    0 0 18px rgba(82, 255, 240, 0.12);
}

body.theme-neon .lesson-content p,
body.theme-neon .lesson-content li,
body.theme-neon .lesson-content td,
body.theme-neon .lesson-content th,
body.theme-neon .lesson-content small,
body.theme-neon .lesson-content span {
  color: var(--mon-neon-ink-soft);
}

body.theme-neon .lesson-content li::marker {
  color: var(--mon-neon-accent);
}

body.theme-neon .lesson-content a,
body.theme-neon .term,
body.theme-neon .lesson-content strong {
  color: #dffffb;
}

body.theme-neon .lesson-content em {
  color: #f9fffe;
}

body.theme-neon .note,
body.theme-neon .warning,
body.theme-neon .tip,
body.theme-neon .definition,
body.theme-neon .example,
body.theme-neon blockquote,
body.theme-neon .de-bai {
  box-shadow:
    0 18px 36px rgba(0, 0, 0, 0.24),
    0 0 0 1px rgba(64, 255, 233, 0.08) inset;
}

body.theme-neon .definition,
body.theme-neon .example,
body.theme-neon blockquote {
  background: linear-gradient(180deg, rgba(11, 31, 48, 0.98), rgba(7, 20, 33, 0.96));
  border-color: rgba(98, 231, 255, 0.32);
}

body.theme-neon .note {
  background: linear-gradient(180deg, rgba(8, 35, 30, 0.96), rgba(5, 24, 20, 0.94));
  border-color: rgba(74, 222, 128, 0.28);
}

body.theme-neon .tip {
  background: linear-gradient(180deg, rgba(8, 28, 48, 0.96), rgba(6, 20, 35, 0.94));
  border-color: rgba(96, 165, 250, 0.3);
}

body.theme-neon .warning {
  background: linear-gradient(180deg, rgba(58, 28, 8, 0.96), rgba(37, 18, 5, 0.94));
  border-color: rgba(245, 158, 11, 0.32);
}

body.theme-neon .de-bai {
  background: linear-gradient(180deg, rgba(8, 30, 30, 0.96), rgba(6, 22, 25, 0.94));
  border-color: rgba(82, 255, 240, 0.22);
}

body.theme-neon .de-bai__title {
  color: var(--mon-neon-accent);
}

body.theme-neon .lesson-content table,
body.theme-neon .lesson-content .ktpl-data-table {
  background: linear-gradient(180deg, rgba(7, 21, 34, 0.99), rgba(8, 24, 38, 0.97));
  border-color: rgba(90, 230, 255, 0.26);
  box-shadow:
    0 20px 46px rgba(0, 0, 0, 0.32),
    0 0 0 1px rgba(82, 255, 240, 0.12) inset,
    0 0 20px rgba(82, 255, 240, 0.08);
}

body.theme-neon .lesson-content thead th {
  background: linear-gradient(180deg, rgba(82, 255, 240, 0.28), rgba(124, 160, 255, 0.24));
  color: #f8fffe;
  border-bottom-color: rgba(82, 255, 240, 0.18);
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.24);
}

body.theme-neon .lesson-content td {
  color: #eef9ff;
  background: rgba(9, 24, 38, 0.98);
  border-top-color: rgba(82, 255, 240, 0.16);
}

body.theme-neon .lesson-content tbody tr:nth-child(even) td {
  background: rgba(11, 29, 46, 1);
}

body.theme-neon .lesson-content tbody tr:hover td {
  background: rgba(15, 40, 62, 1);
}

body.theme-neon .caption {
  color: var(--mon-neon-ink-soft);
}

body.theme-neon pre {
  background: #020915;
  color: #f4fffe;
  border: 1px solid rgba(82, 255, 240, 0.18);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.24);
}