/* Landing page (index.html): colour bands, one per idea. The hero and the closing call sit on the chalkboard
   green; the main buttons are highlighter yellow; each subject has its own colour. */
:root {
  --band-dark: #141a33;          /* lecture-hall navy */
  --band-dark-ink: #f4f1e8;
  --band-dark-dim: #b9bbd2;
  --board: #0c1028;              /* the lesson board inside the hero */
  --board-ink: #f4f1e8;
  --board-dim: #a6a8be;
  --board-rule: rgb(244 241 232 / 0.13);
  --accent: #e0b45a;             /* brass */
  --mark-soft: #fcefc7;          /* gold band */
  --students: #e2f3ea;           /* mint */
  --parents: #e3eafc;            /* sky */
  --glow-1: #3b5bdb;             /* hero colour accents */
  --glow-2: #e0b45a;

}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --band-dark: #10142b; --board: #090c20; --mark-soft: #3a3013; --students: #13332a; --parents: #1a2550; }
}
:root[data-theme="dark"] { --band-dark: #10142b; --board: #090c20; --mark-soft: #3a3013; --students: #13332a; --parents: #1a2550; }



/* ---------- Bands ---------- */
.landing { max-width: var(--page); margin: 0 auto; padding: 16px 16px 40px; display: grid; gap: 20px; }
.band { border-radius: 18px; padding: 28px 22px; }
@media (min-width: 760px) { .band { padding: 40px 40px; } }
.band-hero { background: radial-gradient(60rem 26rem at 105% -10%, rgb(59 91 219 / 0.38), transparent 60%), radial-gradient(40rem 22rem at -10% 110%, rgb(224 180 90 / 0.22), transparent 60%), var(--band-dark); color: var(--band-dark-ink); position: relative; overflow: hidden; }
.band-hero h1, .band-hero h2 { color: var(--band-dark-ink); }
.band-sheet { background: var(--sheet); border: 1px solid var(--rule); }
.band-mark { background: var(--mark-soft); padding-top: 22px; padding-bottom: 22px; }

/* Buttons on the dark bands */
.btn-accent { background: var(--mark); color: #141a33; border-color: var(--mark); }
.btn-accent:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; color: var(--band-dark-ink); border-color: rgb(244 241 232 / 0.45); }
.btn-ghost:hover { border-color: var(--band-dark-ink); filter: none; }
.btn.lg { min-height: 48px; padding: 10px 20px; font-size: 1.0625rem; }

/* ---------- Hero ---------- */
.hero2 { display: grid; gap: 28px; align-items: center; }
@media (min-width: 960px) { .hero2 { grid-template-columns: 1fr 1fr; gap: 40px; } }
.hero2 h1 { font-size: clamp(2.3rem, 6vw, 3.5rem); line-height: 1.04; letter-spacing: -0.022em; font-weight: 600; max-width: 13ch; margin: 0 0 16px; }
.hero2 .lede { font-size: 1.1875rem; line-height: 1.5; max-width: 34ch; margin: 0; color: var(--band-dark-dim); }
.hero2 .actions { display: flex; flex-wrap: wrap; gap: 10px 12px; margin: 26px 0 10px; }
.hero-note { color: var(--band-dark-dim); margin: 0; }

/* The lesson board */
.board { margin: 0; background: var(--board); color: var(--board-ink); border-radius: 14px; padding: 18px 20px 20px; min-height: 330px; display: flex; flex-direction: column; border: 1px solid var(--board-rule); box-shadow: 0 18px 40px -22px rgb(0 0 0 / 0.5); }
.board-top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 12px; border-bottom: 1px solid var(--board-rule); margin-bottom: 14px; }
.board-title { font-family: var(--serif); font-size: 1rem; color: var(--board-dim); }
.board-live { display: inline-flex; align-items: center; gap: 8px; font-size: var(--s-1); color: var(--board-dim); }
.bars { display: inline-flex; gap: 2px; align-items: flex-end; height: 14px; }
.bars i { width: 3px; height: 40%; background: var(--accent); border-radius: 2px; animation: bar 1.1s ease-in-out infinite; }
.bars i:nth-child(2) { animation-delay: -0.3s; } .bars i:nth-child(3) { animation-delay: -0.6s; } .bars i:nth-child(4) { animation-delay: -0.15s; }
@keyframes bar { 0%, 100% { height: 30%; } 50% { height: 100%; } }
.board-lines { list-style: none; margin: 0; padding: 0; font-family: var(--serif); font-size: clamp(1.25rem, 2.6vw, 1.6rem); line-height: 1.45; font-variant-numeric: tabular-nums; flex: 1; }
.board-lines li { opacity: 0; transform: translateY(4px); transition: opacity 0.5s ease, transform 0.5s ease; }
.board-lines li.in { opacity: 1; transform: none; }
.board-lines .mark { color: #141a33; }
.board-talk { margin-top: 14px; min-height: 92px; display: grid; gap: 8px; align-content: end; }
.say { margin: 0; font-size: 0.9875rem; line-height: 1.45; max-width: 46ch; }
.say-neel { color: var(--board-ink); }
.say-neel:not(:empty)::before { content: "Neel  "; font-weight: 700; color: var(--accent); }
.say-student { justify-self: end; background: var(--mark); color: #141a33; padding: 8px 12px; border-radius: 12px 12px 2px 12px; font-weight: 500; }
@media (prefers-reduced-motion: reduce) { .bars i { animation: none; height: 60%; } .board-lines li { transition: none; } }

/* Course tiles: big names, a stripe in the subject's colour */
.course-tiles { margin-top: 32px; padding-top: 24px; border-top: 1px solid rgb(224 180 90 / 0.35); }
.course-tiles h2 { font-family: var(--sans); font-size: 0.9375rem; font-weight: 600; color: var(--band-dark-dim); margin: 0 0 12px; letter-spacing: 0; }
.course-tiles ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 150px), 1fr)); }
@media (min-width: 760px) { .course-tiles ul { grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); } }
@media (max-width: 480px) { .ct-name { font-size: 1.0625rem; } .course-tile { padding: 12px 12px 12px 14px; } }
.course-tile { display: flex; flex-direction: column; gap: 2px; padding: 14px 16px 14px 18px; border-radius: 12px; background: var(--sheet); color: var(--ink); text-decoration: none; border-left: 6px solid var(--subj, var(--teal)); height: 100%; }
.course-tile:hover { text-decoration: none; box-shadow: 0 0 0 2px var(--mark); }
.course-tile:focus-visible { outline: 3px solid var(--mark); outline-offset: 2px; }
.ct-name { font-family: var(--serif); font-size: 1.25rem; font-weight: 600; line-height: 1.2; }
.ct-level { font-size: 0.875rem; color: var(--ink-2); }
.course-tile.soon { background: transparent; color: var(--band-dark-ink); border: 1px dashed rgb(244 241 232 / 0.45); border-left-width: 1px; }
.course-tile.soon .ct-level { color: var(--band-dark-dim); }

/* Subject tabs above the course tiles: one subject's courses at a time */
.subj-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 14px; }
.subj-tab { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 6px 14px 6px 12px; border-radius: 999px; border: 1px solid rgb(244 241 232 / 0.32); background: transparent; color: var(--band-dark-ink); font: inherit; font-weight: 600; cursor: pointer; }
.subj-tab::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--subj, var(--accent)); }
.subj-tab .n { font-size: 0.8125rem; font-weight: 600; padding: 1px 7px; border-radius: 999px; background: rgb(244 241 232 / 0.14); color: var(--band-dark-dim); }
.subj-tab:hover { border-color: var(--band-dark-ink); }
.subj-tab[aria-selected="true"] { background: var(--band-dark-ink); color: #141a33; border-color: var(--band-dark-ink); }
.subj-tab[aria-selected="true"] .n { background: color-mix(in srgb, var(--subj, var(--accent)) 22%, transparent); color: #141a33; }
.subj-tab:focus-visible { outline: 3px solid var(--mark); outline-offset: 2px; }
.more-subj { margin: 14px 0 0; color: var(--band-dark-dim); font-size: 0.9375rem; }
.more-subj a { color: var(--band-dark-ink); }

/* ---------- For students / for parents: two coloured tiles ---------- */
.who-grid { display: grid; gap: 20px; }
@media (min-width: 960px) { .who-grid { grid-template-columns: 1.2fr 1fr; } }
.aud { border-radius: 18px; padding: 26px 24px; min-width: 0; }
.aud-students { background: var(--students); }
.aud-parents { background: var(--parents); align-self: stretch; display: flex; flex-direction: column; gap: 16px; }
.aud-parents .btn { align-self: flex-start; margin-top: auto; }
.aud h3 { display: flex; align-items: center; gap: 10px; font-size: 1.5rem; margin: 0 0 16px; }
.aud h3 .i { width: 24px; height: 24px; color: var(--s-finance); }
.aud-parents h3 { margin-bottom: 0; }
.aud-parents h3 .i { color: var(--s-math); }
.aud h4 { font-family: var(--serif); font-size: 1.125rem; margin: 0 0 2px; }
.steps-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; counter-reset: step; }
.steps-list li { counter-increment: step; display: grid; grid-template-columns: 34px 1fr; column-gap: 12px; }
.steps-list li::before { content: counter(step); grid-row: span 2; width: 30px; height: 30px; border-radius: 50%; background: var(--s-finance); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 0.9375rem; }
.steps-list p { margin: 0; color: var(--ink-2); }
.aud-parents .icon-list { gap: 12px; font-size: 1.0rem; }
.aud-parents .icon-list li > .i { color: var(--s-math); }
.picker { margin-top: 22px; padding: 16px 18px; background: var(--sheet); border-radius: 12px; }
.picker h4 { margin: 0 0 10px; }
.picker-row { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: flex-end; }
.picker label { display: grid; gap: 4px; font-size: 0.875rem; color: var(--ink-2); font-weight: 500; }
.picker select { min-width: 12rem; }

/* ---------- Subjects ---------- */
.offer h2 { margin: 0 0 16px; font-size: clamp(1.6rem, 3.4vw, 2rem); }
.offer .subject-card { border-top: 6px solid var(--subj, var(--teal)); }
.offer .subject-card .tag.live { background: color-mix(in srgb, var(--subj, var(--teal)) 12%, transparent); color: var(--subj, var(--teal)); border-color: color-mix(in srgb, var(--subj, var(--teal)) 40%, transparent); }
.offer .subject-card .btn { background: var(--subj, var(--btn-bg)); border-color: var(--subj, var(--btn-bg)); color: #fff; }
.offer .subject-card .ico { background: color-mix(in srgb, var(--subj, var(--teal)) 14%, transparent); color: var(--subj, var(--teal)); }
.offer .subject-card h3 { font-size: 1.375rem; }
.coming { margin-top: 24px; }
.coming h3 { font-size: 1.0625rem; margin: 0 0 10px; }
.coming-list { list-style: none; margin: 0 0 10px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.coming-list li { display: inline-flex; align-items: center; gap: 7px; padding: 7px 13px 7px 11px; border: 1px dashed color-mix(in srgb, var(--subj, var(--rule)) 55%, transparent); background: color-mix(in srgb, var(--subj, transparent) 7%, var(--sheet)); border-radius: 999px; color: var(--ink); font-size: 0.9375rem; }
.coming-list .i { width: 17px; height: 17px; color: var(--subj, var(--ink-3)); }

/* ---------- Numbers on the highlighter band ---------- */
.stat-strip { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 40px; justify-content: space-between; }
.stat-strip li { display: flex; align-items: baseline; gap: 8px; }
.stat-strip .n { font-family: var(--serif); font-size: 1.75rem; font-weight: 600; font-variant-numeric: tabular-nums; color: #8a5a12; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .stat-strip .n { color: var(--mark); } }
:root[data-theme="dark"] .stat-strip .n { color: var(--mark); }
.stat-strip .l { color: var(--ink-2); }

/* ---------- Closing call ---------- */
.final h2 { font-size: clamp(1.7rem, 3.8vw, 2.4rem); margin: 0 0 6px; }
.final p { color: var(--band-dark-dim); margin: 0; }
.final .actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.landing .cta-band { padding: 0; }