/* VIDIKSHA learning portal and control panel. Same tokens and type as vidiksha.in. */
@import url('https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,400;6..72,500&family=Instrument+Sans:wght@400;500;600&display=swap');
:root {
  --bg: #fafaf9; --surface: #ffffff; --text: #0f0e0d; --muted: #6f6c66; --line: #e4e2dd; --accent: #1d4a39; --accent-soft: #e6efe9;
  --danger: #a33a2e; --warn: #8a5a00; --font-display: 'Newsreader', 'Times New Roman', serif; --font-body: 'Instrument Sans', Helvetica, Arial, sans-serif;
  --sidebar: 240px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: var(--font-body); font-size: 15px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 400; margin: 0 0 0.5rem; letter-spacing: -0.01em; }
h1 { font-size: 2rem; line-height: 1.15; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.eyebrow { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); font-weight: 500; margin: 0 0 0.5rem; }
[hidden] { display: none !important; }

/* shell */
.shell { display: grid; grid-template-columns: var(--sidebar) 1fr; min-height: 100vh; }
.sidebar { background: var(--text); color: #cfcbc3; padding: 1.5rem 1.25rem; display: flex; flex-direction: column; gap: 1.5rem; position: sticky; top: 0; height: 100vh; }
.brand { font-family: var(--font-display); color: #fafaf9; font-size: 1.15rem; letter-spacing: 0.22em; text-decoration: none; }
.brand small { display: block; font-family: var(--font-body); letter-spacing: 0.12em; font-size: 0.62rem; color: #8f8b84; margin-top: 0.35rem; text-transform: uppercase; }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav a { color: #cfcbc3; padding: 0.55rem 0.75rem; border-left: 2px solid transparent; font-size: 0.93rem; }
.nav a:hover { color: #fff; text-decoration: none; background: rgba(255,255,255,0.04); }
.nav a.is-active { color: #fff; border-left-color: #fafaf9; background: rgba(255,255,255,0.06); }
.nav .badge { float: right; background: #fafaf9; color: var(--text); font-size: 0.7rem; padding: 0 0.4rem; border-radius: 999px; line-height: 1.4rem; }
.nav-sep { height: 1px; background: rgba(255,255,255,0.1); margin: 0.5rem 0; }
.user-chip { margin-top: auto; display: flex; gap: 0.7rem; align-items: center; font-size: 0.85rem; color: #cfcbc3; }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 600; font-size: 0.8rem; flex: none; }
.user-chip b { color: #fff; display: block; font-weight: 500; }
.user-chip button { background: none; border: 0; color: #8f8b84; cursor: pointer; padding: 0; font: inherit; font-size: 0.8rem; }
.user-chip button:hover { color: #fff; }
main { padding: 2.25rem 2.5rem 4rem; max-width: 1180px; width: 100%; }
.topbar { display: none; }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; padding: 0.9rem 1rem; }
  .nav { flex-direction: row; flex-wrap: wrap; gap: 0; }
  .nav a { border-left: 0; border-bottom: 2px solid transparent; padding: 0.4rem 0.6rem; }
  .nav a.is-active { border-bottom-color: #fafaf9; }
  .nav-sep, .user-chip b { display: none; }
  .user-chip { margin-left: auto; }
  main { padding: 1.25rem 1rem 3rem; }
}

/* page head */
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; margin-bottom: 1.75rem; flex-wrap: wrap; }
.page-head p { margin: 0.25rem 0 0; color: var(--muted); }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

/* cards & grids */
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); padding: 1.25rem 1.4rem; }
.card h3 { margin-bottom: 0.35rem; }
.card.is-link { display: block; color: inherit; }
.card.is-link:hover { text-decoration: none; border-color: var(--text); }
.stat { padding: 1.1rem 1.3rem; }
.stat .n { font-family: var(--font-display); font-size: 2rem; line-height: 1; }
.stat .l { color: var(--muted); font-size: 0.82rem; margin-top: 0.4rem; }
.section { margin-top: 2.25rem; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; border-bottom: 1px solid var(--line); padding-bottom: 0.6rem; margin-bottom: 1rem; }
.section-head h2 { margin: 0; }
.progress { height: 4px; background: var(--line); margin-top: 0.75rem; }
.progress i { display: block; height: 100%; background: var(--accent); }

/* lists & tables */
.list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.list li { display: flex; gap: 1rem; align-items: center; padding: 0.85rem 0; border-bottom: 1px solid var(--line); }
.list li .grow { flex: 1; min-width: 0; }
.list li .t { font-weight: 500; }
.list li .s { color: var(--muted); font-size: 0.85rem; }
.list a.row { display: flex; gap: 1rem; align-items: center; color: inherit; width: 100%; }
.list a.row:hover { text-decoration: none; }
.list a.row:hover .t { text-decoration: underline; }
.num { font-family: var(--font-display); color: var(--muted); width: 2rem; flex: none; }
.tick { width: 20px; height: 20px; border: 1px solid var(--line); border-radius: 50%; flex: none; display: grid; place-items: center; font-size: 0.7rem; }
.tick.is-done { background: var(--accent); border-color: var(--accent); color: #fff; }
.table-wrap { overflow: visible; background: var(--surface); border: 1px solid var(--line); }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; table-layout: auto; }
th, td { text-align: left; padding: 0.65rem 0.85rem; border-bottom: 1px solid var(--line); vertical-align: top; white-space: normal; overflow-wrap: anywhere; }
td.nowrap, th.nowrap { white-space: nowrap; }
td .pill { white-space: nowrap; }
th { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); font-weight: 500; background: #f4f3f0; }
td .sub { display: block; color: var(--muted); font-size: 0.8rem; margin-top: 0.15rem; }
td .mono { font-family: Menlo, Consolas, monospace; font-size: 0.78rem; color: var(--muted); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: #faf9f7; }
.pill { display: inline-block; font-size: 0.72rem; padding: 0.1rem 0.5rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); white-space: nowrap; }
.pill.ok { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.pill.warn { background: #fbf1dc; color: var(--warn); border-color: transparent; }
.pill.bad { background: #f9e3df; color: var(--danger); border-color: transparent; }

/* forms */
.form { display: grid; gap: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }
.field { display: block; }
.field > span { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.3rem; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], input[type=datetime-local], input[type=url], input[type=search], select, textarea {
  width: 100%; font: inherit; font-size: 0.95rem; padding: 0.6rem 0.75rem; border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 0;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--text); outline-offset: -1px; }
textarea { min-height: 120px; resize: vertical; }
textarea.tall { min-height: 320px; font-family: Menlo, Consolas, monospace; font-size: 0.88rem; }
input[type=file] { font: inherit; font-size: 0.9rem; }
.check { display: flex; gap: 0.5rem; align-items: center; font-size: 0.95rem; }
.check input { width: 16px; height: 16px; }
.pw { position: relative; }
.pw input { padding-right: 3.6rem; }
.pw button { position: absolute; right: 0.5rem; top: 50%; transform: translateY(-50%); background: none; border: 0; color: var(--muted); font: inherit; font-size: 0.8rem; cursor: pointer; }
.btn { display: inline-block; font: inherit; font-size: 0.92rem; font-weight: 500; padding: 0.6rem 1.1rem; border: 1px solid var(--text); background: var(--text); color: #fafaf9; cursor: pointer; text-decoration: none; line-height: 1.2; }
.btn:hover { background: #2a2825; text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-ghost { background: transparent; color: var(--text); }
.btn-ghost:hover { background: #efede9; }
.btn-sm { padding: 0.38rem 0.75rem; font-size: 0.82rem; }
.btn-danger { border-color: var(--danger); color: var(--danger); background: transparent; }
.btn-danger:hover { background: #f9e3df; }
.status { font-size: 0.9rem; color: var(--muted); min-height: 1.3em; margin: 0; }
.status.is-error { color: var(--danger); }
.status.is-ok { color: var(--accent); }
.fine { font-size: 0.8rem; color: var(--muted); }

/* auth */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 2rem 1rem; }
.auth-card { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--line); padding: 2.25rem 2.25rem 2rem; }
.auth-card .brand { color: var(--text); font-size: 1.1rem; display: block; margin-bottom: 1.5rem; }
.auth-card .brand small { color: var(--muted); }
.auth-card h1 { font-size: 1.6rem; }
.auth-foot { margin-top: 1.25rem; font-size: 0.85rem; color: var(--muted); }

/* player */
.player { background: #000; aspect-ratio: 16 / 9; width: 100%; border: 1px solid var(--line); }
.player iframe, .player video { width: 100%; height: 100%; border: 0; display: block; }
.lecture-layout { display: grid; grid-template-columns: 1fr 320px; gap: 2rem; align-items: start; }
@media (max-width: 1000px) { .lecture-layout { grid-template-columns: 1fr; } }
.prose p { margin-bottom: 0.9rem; }
.prose { max-width: 70ch; }

/* notices */
.notice { border-left: 2px solid var(--accent); padding: 0.75rem 1rem; background: var(--surface); border-top: 1px solid var(--line); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-bottom: 0.75rem; }
.notice .meta { font-size: 0.78rem; color: var(--muted); margin-bottom: 0.25rem; }
.notice.is-pinned { border-left-color: var(--text); }
.msg { padding: 0.9rem 1.1rem; border: 1px solid var(--line); background: var(--surface); margin-bottom: 0.6rem; max-width: 70ch; }
.msg.is-mine { margin-left: auto; background: var(--accent-soft); border-color: transparent; }
.msg .meta { font-size: 0.75rem; color: var(--muted); margin-top: 0.4rem; }
.msg.is-unread { border-color: var(--text); }

/* misc */
.empty { padding: 2rem 1rem; text-align: center; color: var(--muted); border: 1px dashed var(--line); }
.spin { display: inline-block; width: 12px; height: 12px; border: 2px solid var(--line); border-top-color: var(--text); border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }
.toast { position: fixed; left: 50%; bottom: 1.5rem; transform: translate(-50%, 20px); background: var(--text); color: #fafaf9; padding: 0.7rem 1.1rem; font-size: 0.9rem; opacity: 0; pointer-events: none; transition: all 0.2s; z-index: 50; max-width: 90vw; }
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }
.toast.is-error { background: var(--danger); }
.toast.is-ok { background: var(--accent); }
.tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--line); margin-bottom: 1.25rem; flex-wrap: wrap; }
.tabs a { padding: 0.5rem 0.9rem; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a.is-active { color: var(--text); border-bottom-color: var(--text); }
.tabs a:hover { text-decoration: none; color: var(--text); }
.toolbar { display: flex; gap: 0.6rem; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; }
.toolbar input[type=search] { max-width: 320px; }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 0.35rem 1rem; font-size: 0.92rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.right { text-align: right; }
.inline-form { display: flex; gap: 0.5rem; align-items: flex-end; flex-wrap: wrap; }
.inline-form .field { flex: 1; min-width: 160px; }
dialog { border: 1px solid var(--line); padding: 0; max-width: 640px; width: calc(100% - 2rem); }
dialog::backdrop { background: rgba(15, 14, 13, 0.5); }
dialog .dlg { padding: 1.5rem 1.75rem; }
dialog h2 { margin-bottom: 1rem; }

/* course page: curriculum sessions */
.course-progress { margin: -0.75rem 0 1.5rem; max-width: 560px; }
.course-progress .progress { margin-top: 0.4rem; }
.course-card h3 a { color: inherit; }
.course-card h3 a:hover { text-decoration: underline; }
.sessions { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.session { display: grid; grid-template-columns: 3rem 1fr auto; gap: 1rem 1.25rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line); align-items: start; }
.session-num { font-family: var(--font-display); font-size: 1.5rem; color: var(--muted); line-height: 1.2; }
.session.is-done .session-num { color: var(--accent); }
.session-top { display: flex; gap: 0.75rem; align-items: baseline; flex-wrap: wrap; }
.session-top h3 { margin: 0; font-size: 1.2rem; }
.lessons { margin-top: 0.5rem; font-size: 0.9rem; }
.lessons summary { cursor: pointer; color: var(--accent); list-style: none; }
.lessons summary::-webkit-details-marker { display: none; }
.lessons summary::before { content: '+ '; }
.lessons[open] summary::before { content: '\2212  '; }
.lessons ul { margin: 0.5rem 0 0; padding-left: 1.1rem; color: #33312c; }
.lessons li { padding: 0.15rem 0; }
.session-action { align-self: center; }
.play { display: inline-flex; align-items: center; gap: 0.6rem; border: 1px solid var(--text); background: var(--text); color: #fafaf9; padding: 0.55rem 1rem 0.55rem 0.6rem; font-size: 0.9rem; font-weight: 500; white-space: nowrap; }
.play:hover { background: #2a2825; text-decoration: none; }
.play-icon { width: 28px; height: 28px; border-radius: 50%; background: #fafaf9; color: var(--text); display: grid; place-items: center; font-size: 0.7rem; padding-left: 2px; }
.play.is-off { background: transparent; color: var(--muted); border-color: var(--line); cursor: default; }
.play.is-off .play-icon { background: var(--line); color: var(--muted); }
.session.is-done .play { background: transparent; color: var(--text); }
.session.is-done .play .play-icon { background: var(--accent); color: #fff; }
.covers { margin: 0; padding-left: 1.1rem; font-size: 0.9rem; color: #33312c; }
.covers li { padding: 0.15rem 0; }
@media (max-width: 640px) { .session { grid-template-columns: 2.4rem 1fr; } .session-action { grid-column: 2; } }

/* toolbar controls keep their natural width */
.toolbar select { width: auto; min-width: 180px; }

/* control panel: curriculum editor */
.cur-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.cur-item { display: grid; grid-template-columns: 2.6rem 1fr auto; gap: 0.75rem 1rem; padding: 0.9rem 0; border-bottom: 1px solid var(--line); align-items: start; }
.cur-num { font-family: var(--font-display); font-size: 1.3rem; color: var(--muted); }
.cur-top { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.cur-lessons { margin: 0.35rem 0 0; padding-left: 1.1rem; font-size: 0.88rem; color: #33312c; }
.cur-lessons li { padding: 0.1rem 0; }
.cur-actions { display: flex; gap: 0.3rem; flex-wrap: wrap; justify-content: flex-end; }
@media (max-width: 760px) { .cur-item { grid-template-columns: 2.2rem 1fr; } .cur-actions { grid-column: 2; justify-content: flex-start; } }