/* CodeShaala SI: shared portal styles. Builds on /styles.css tokens (dark indigo brand). */
:root {
  --si-a: #a855f7; --si-b: #22d3ee; --si-c: #f59e0b; --si-good: #34d399; --si-bad: #f87171; --si-warm: #fb7185;
  --si-grad: linear-gradient(120deg, #f59e0b, #a855f7 50%, #22d3ee);
  --panel: #121a3a; --panel2: #0f1733; --line: rgba(255,255,255,.11); --txt: #e8ecf8; --mut: #9aa6c8;
  --radius: 18px; --tap: 44px;
}
body.si-band-1-2 { --tap: 56px; }
body.si-band-3-5 { --tap: 48px; }
body.si-band-1-2 .si-step, body.si-band-3-5 .si-step, body.si-band-1-2 .si-btn-sm, body.si-band-3-5 .si-btn-sm { min-height: 46px; padding-left: 14px; padding-right: 14px; font-size: 14px; }
body.si-dyslexia { font-family: 'Lexend', 'Comic Sans MS', 'Inter', sans-serif; letter-spacing: .02em; word-spacing: .06em; }
body.si-dyslexia .si-main { line-height: 1.75; }
html[lang="hi"] body { font-family: 'Inter', 'Noto Sans Devanagari', 'Mangal', sans-serif; }

.si-main { max-width: 1160px; margin: 0 auto; padding: 18px 16px 70px; min-height: 70vh; }
.si-main:focus { outline: none; }
.si-hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- top strip: SI truth line + toolbar ---------- */
.si-strip { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: space-between;
  border-bottom: 1px solid var(--line); padding: 8px 16px; background: rgba(15,23,51,.65); font-size: 13px; }
.si-truth { color: #fde68a; display: flex; gap: 8px; align-items: center; }
.si-truth b { color: #fff; }
.si-tools { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.si-crumbs { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; color: var(--mut); font-size: 14px; margin: 4px 0 14px; }
.si-crumbs a { color: #c4b5fd; text-decoration: underline; text-underline-offset: 3px; }

/* ---------- buttons, chips ---------- */
.si-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: var(--tap); padding: 10px 18px;
  border-radius: 13px; border: 0; background: linear-gradient(120deg, #a855f7, #6366f1); color: #fff; font: inherit; font-weight: 800;
  font-size: 15px; cursor: pointer; text-decoration: none; transition: transform .12s, box-shadow .15s, opacity .15s; }
.si-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px -12px rgba(168,85,247,.9); }
.si-btn:disabled, .si-btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.si-btn-ghost { background: rgba(255,255,255,.06); border: 1px solid var(--line); color: var(--txt); }
.si-btn-ghost:hover { border-color: var(--si-a); box-shadow: none; }
.si-btn-sm { min-height: 36px; padding: 6px 12px; font-size: 13px; border-radius: 10px; }
.si-btn-big { min-height: 56px; padding: 12px 22px; font-size: 18px; border-radius: 16px; }
.si-btn-good { background: linear-gradient(120deg, #10b981, #0891b2); }
.si-chip { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 6px 13px; border-radius: 999px; border: 1px solid var(--line);
  background: rgba(255,255,255,.04); color: #c4cdee; font: inherit; font-size: 13.5px; font-weight: 700; cursor: pointer; }
.si-chip.on, .si-chip[aria-pressed="true"] { background: var(--si-grad); color: #160f2a; border-color: transparent; }
:where(.si-btn, .si-chip, .si-door, .si-node, a, button, input, select, textarea, [tabindex]):focus-visible { outline: 3px solid #fde68a; outline-offset: 2px; }

/* ---------- generic blocks used by labs ---------- */
.si-card { background: linear-gradient(165deg, #121a3a, #0d1430); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.si-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.si-col { display: flex; flex-direction: column; gap: 10px; }
.si-lab { padding: 4px 0; display: flex; flex-direction: column; gap: 12px; }
.si-lab-title { font-weight: 800; font-size: 17px; margin: 0; }
.si-lab-help { color: var(--mut); font-size: 13.5px; margin: 0; }
.si-stage { display: flex; justify-content: center; align-items: center; width: 100%; }
.si-svg { width: 100%; height: auto; max-width: 100%; display: block; }
.si-slider { display: grid; grid-template-columns: minmax(90px, auto) 1fr 52px; align-items: center; gap: 10px; font-size: 14px; }
.si-slider input[type=range] { width: 100%; min-height: 32px; accent-color: var(--si-a); }
.si-slider output, .si-slider .v { font-variant-numeric: tabular-nums; text-align: right; font-weight: 700; }
.si-table { border-collapse: collapse; width: 100%; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.si-table th, .si-table td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; }
.si-table th { background: rgba(255,255,255,.05); font-weight: 700; color: #dfe5ff; }
.si-tablewrap { overflow-x: auto; max-width: 100%; }
.si-kv { display: inline-flex; flex-direction: column; padding: 8px 12px; border-radius: 12px; background: rgba(255,255,255,.05); border: 1px solid var(--line); min-width: 90px; }
.si-kv b { font-size: 20px; font-variant-numeric: tabular-nums; }
.si-kv span { font-size: 12px; color: var(--mut); }
.si-notice { padding: 10px 14px; border-radius: 12px; background: rgba(34,211,238,.1); border: 1px solid rgba(34,211,238,.35); font-size: 14px; }
.si-notice-warn { background: rgba(245,158,11,.12); border-color: rgba(245,158,11,.45); color: #fde68a; }
.si-notice-good { background: rgba(52,211,153,.12); border-color: rgba(52,211,153,.45); color: #bbf7d0; }
.si-axis { stroke: rgba(255,255,255,.3); stroke-width: 1; }
.si-line { fill: none; stroke: var(--si-b); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.si-chart-label { fill: var(--mut); font-size: 11px; }
.si-cell { stroke: rgba(255,255,255,.18); stroke-width: 1; }
.si-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
pre.si-mono, textarea.si-mono { background: #070b18; border: 1px solid var(--line); border-radius: 12px; padding: 12px; color: #dbe4ff; overflow-x: auto; white-space: pre; }
textarea.si-mono { width: 100%; min-height: 180px; resize: vertical; white-space: pre; }
.si-input, .si-main textarea, .si-main select { font: inherit; color: var(--txt); background: rgba(255,255,255,.05); border: 1px solid var(--line); border-radius: 11px; padding: 10px 12px; min-height: var(--tap); }
.si-main textarea { width: 100%; min-height: 110px; resize: vertical; line-height: 1.5; }
.si-train { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.si-train-bar { flex: 1 1 180px; height: 10px; border-radius: 99px; background: rgba(255,255,255,.1); overflow: hidden; }
.si-train-bar i { display: block; height: 100%; width: 0; background: var(--si-grad); transition: width .15s; }
.si-train-txt { font-size: 13px; color: var(--mut); font-variant-numeric: tabular-nums; }

/* ---------- hub ---------- */
.si-hero { display: grid; grid-template-columns: 1.25fr 1fr; gap: 26px; align-items: center; padding: 18px 0 8px; }
.si-hero h1 { font-size: clamp(30px, 5vw, 52px); letter-spacing: -.03em; line-height: 1.05; margin: 0 0 12px; }
.si-hero h1 em { font-style: normal; background: var(--si-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.si-hero p { color: #c4cdee; font-size: clamp(15px, 1.8vw, 18px); margin: 0 0 16px; max-width: 58ch; }
.si-kicker { font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--si-c); margin-bottom: 8px; }
.si-hero-art { width: 100%; max-width: 420px; justify-self: center; }
.si-trackcard { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border-radius: 16px; border: 1px solid var(--line); background: rgba(255,255,255,.04); margin-bottom: 12px; }
.si-trackcard .badge { font-size: 12px; font-weight: 800; padding: 4px 10px; border-radius: 999px; background: var(--si-grad); color: #160f2a; white-space: nowrap; }
.si-bands { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 10px; }
.si-doors { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 14px 0 26px; }
.si-door { position: relative; display: flex; flex-direction: column; gap: 6px; text-align: left; padding: 20px 18px 18px; border-radius: 20px; border: 1px solid var(--line);
  background: linear-gradient(165deg, #131c40, #0c1330); color: var(--txt); font: inherit; cursor: pointer; text-decoration: none; min-height: 190px;
  transition: transform .14s, border-color .14s, box-shadow .18s; overflow: hidden; }
.si-door:hover { transform: translateY(-4px); border-color: var(--si-a); box-shadow: 0 22px 40px -24px rgba(168,85,247,.9); }
.si-door .ic { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; font-size: 28px; margin-bottom: 6px; }
.si-door h3 { margin: 0; font-size: 19px; }
.si-door p { margin: 0; color: #b8c2e6; font-size: 14px; flex: 1; }
.si-door .go { font-weight: 800; font-size: 14px; }
.si-door.lab .ic { background: rgba(34,211,238,.16); }
.si-door.dojo .ic { background: rgba(245,158,11,.16); }
.si-door.arena .ic { background: rgba(251,113,133,.16); }
.si-door.desk .ic { background: rgba(168,85,247,.18); }
.si-door.locked { cursor: default; opacity: .7; border-style: dashed; }
.si-door.locked:hover { transform: none; box-shadow: none; border-color: var(--line); }
.si-door .lock { position: absolute; top: 14px; right: 14px; font-size: 12px; font-weight: 800; color: var(--mut); border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px; }
.si-section-h { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 26px 0 12px; }
.si-section-h h2 { margin: 0; font-size: 22px; }
.si-section-h p { margin: 0; color: var(--mut); font-size: 14px; }
.si-gradegrid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.si-gradebtn { display: flex; flex-direction: column; gap: 2px; padding: 12px; border-radius: 14px; border: 1px solid var(--line); background: rgba(255,255,255,.035); color: var(--txt); text-decoration: none; min-height: 72px; }
.si-gradebtn b { font-size: 17px; }
.si-gradebtn span { font-size: 12px; color: var(--mut); }
.si-gradebtn .meter { height: 5px; border-radius: 99px; background: rgba(255,255,255,.08); overflow: hidden; margin-top: auto; }
.si-gradebtn .meter i { display: block; height: 100%; background: var(--si-grad); }
.si-gradebtn.mine { border-color: var(--si-c); background: rgba(245,158,11,.08); }
.si-gradebtn:hover { border-color: var(--si-a); }
.si-howknow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.si-howknow .si-card h4 { margin: 0 0 6px; font-size: 15px; }
.si-howknow .si-card p { margin: 0; color: #b8c2e6; font-size: 14px; }

/* ---------- unit map ---------- */
.si-map-head { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 8px; }
.si-map-head h1 { margin: 0; font-size: clamp(24px, 3.6vw, 34px); letter-spacing: -.02em; }
.si-map { position: relative; display: flex; flex-direction: column; gap: 0; margin: 14px 0; padding-left: 8px; }
.si-node { position: relative; display: grid; grid-template-columns: 64px 1fr auto; align-items: center; gap: 14px; padding: 14px 14px; margin-left: calc(var(--x, 0) * 1px);
  border-radius: 18px; border: 1px solid var(--line); background: linear-gradient(165deg, #121a3a, #0d1430); color: var(--txt); text-decoration: none; margin-bottom: 26px; max-width: 760px; }
.si-node:not(:last-child)::after { content: ""; position: absolute; left: 44px; bottom: -27px; height: 26px; border-left: 3px dashed rgba(255,255,255,.18); }
.si-node .bubble { width: 60px; height: 60px; border-radius: 50%; display: grid; place-items: center; font-size: 28px; background: rgba(255,255,255,.06); border: 2px solid var(--line); }
.si-node .meta { font-size: 12.5px; color: var(--mut); display: flex; gap: 8px; flex-wrap: wrap; }
.si-node h3 { margin: 2px 0 2px; font-size: 17px; }
.si-node .state { font-size: 12px; font-weight: 800; padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.si-node.done .bubble { border-color: var(--si-good); background: rgba(52,211,153,.14); }
.si-node.done .state { background: rgba(52,211,153,.18); color: #bbf7d0; }
.si-node.ready .bubble { border-color: var(--si-c); background: rgba(245,158,11,.14); animation: si-pulse 2.2s infinite; }
.si-node.ready .state { background: rgba(245,158,11,.2); color: #fde68a; }
.si-node.locked { opacity: .6; }
.si-node.locked .state { background: rgba(255,255,255,.06); color: var(--mut); }
.si-node:not(.locked):hover { border-color: var(--si-a); }
.si-tag { font-size: 11px; font-weight: 800; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); color: #c4cdee; }
@keyframes si-pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(245,158,11,.45); } 50% { box-shadow: 0 0 0 9px rgba(245,158,11,0); } }
@media (prefers-reduced-motion: reduce) { .si-node.ready .bubble { animation: none; } * { scroll-behavior: auto !important; } }
body.si-nomotion .si-node.ready .bubble { animation: none; }

/* ---------- lesson player ---------- */
.si-player { display: grid; grid-template-columns: minmax(300px, 400px) 1fr; gap: 18px; align-items: start; }
.si-player-head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; justify-content: space-between; margin-bottom: 12px; }
.si-player-head h1 { margin: 0; font-size: clamp(21px, 3vw, 30px); letter-spacing: -.02em; }
.si-steps { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.si-step { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 5px 11px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,.035);
  color: #c4cdee; font: inherit; font-size: 12.5px; font-weight: 700; cursor: pointer; }
.si-step .n { width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font-size: 11px; background: rgba(255,255,255,.1); }
.si-step.done .n { background: var(--si-good); color: #052e1a; }
.si-step.cur { background: var(--si-grad); color: #160f2a; border-color: transparent; }
.si-step.cur .n { background: rgba(0,0,0,.2); color: #fff; }
.si-step:disabled { opacity: .45; cursor: not-allowed; }
.si-stepcard { position: sticky; top: 12px; }
.si-stepcard h2 { margin: 0 0 6px; font-size: 20px; }
.si-stepcard .k { font-size: 11.5px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--si-c); }
.si-stepcard p { color: #dbe2ff; font-size: 15.5px; margin: 8px 0 12px; }
.si-options { display: flex; flex-direction: column; gap: 8px; margin: 8px 0 12px; }
.si-opt { text-align: left; min-height: var(--tap); padding: 10px 14px; border-radius: 13px; border: 1px solid var(--line); background: rgba(255,255,255,.04); color: var(--txt); font: inherit; font-size: 15px; cursor: pointer; }
.si-opt:hover { border-color: var(--si-a); }
.si-opt.on { border-color: var(--si-c); background: rgba(245,158,11,.12); }
.si-opt.right { border-color: var(--si-good); background: rgba(52,211,153,.14); }
.si-opt.try { border-color: rgba(251,113,133,.6); background: rgba(251,113,133,.08); }
.si-hint { padding: 10px 14px; border-radius: 12px; background: rgba(168,85,247,.12); border: 1px solid rgba(168,85,247,.35); font-size: 14.5px; margin: 6px 0; }
.si-hint b { color: #e9d5ff; }
.si-stepnav { display: flex; gap: 8px; justify-content: space-between; flex-wrap: wrap; margin-top: 12px; }
.si-labpanel { min-height: 320px; }
.si-labpanel .gate { display: grid; place-items: center; text-align: center; min-height: 300px; color: var(--mut); gap: 10px; padding: 20px; }
.si-labpanel .gate .big { font-size: 46px; }
.si-unplugged { border: 2px dashed rgba(245,158,11,.5); background: rgba(245,158,11,.06); }
.si-unplugged ol { margin: 8px 0 0; padding-left: 22px; }
.si-unplugged li { margin: 6px 0; }
.si-done-card { text-align: center; }
.si-sticker { font-size: 64px; line-height: 1; margin: 6px 0; }
.si-std { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- desk ---------- */
.si-desk-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.si-prompt { text-align: left; display: flex; flex-direction: column; gap: 8px; cursor: pointer; font: inherit; color: var(--txt); }
.si-prompt:hover { border-color: var(--si-a); }
.si-prompt h3 { margin: 0; font-size: 16px; }
.si-sides { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.si-claim { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: start; padding: 10px; border-radius: 12px; border: 1px solid var(--line); background: rgba(255,255,255,.03); margin-bottom: 8px; }
.si-labels { display: flex; flex-wrap: wrap; gap: 6px; }
.si-label-known { --c: #34d399; } .si-label-likely { --c: #22d3ee; } .si-label-uncertain { --c: #f59e0b; } .si-label-speculative { --c: #fb7185; }
.si-labels .si-chip.on { background: var(--c); color: #0b1020; }
.si-vote { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.si-vote .bar { height: 12px; border-radius: 99px; background: var(--si-b); }

/* ---------- teacher ---------- */
.si-teacher-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0 16px; }
.si-plan { background: #fff; color: #0f172a; border-radius: 14px; padding: 22px; }
.si-plan h2, .si-plan h3 { color: #0f172a; margin: 10px 0 6px; }
.si-plan p, .si-plan li { color: #1e293b; font-size: 14px; }
.si-plan .si-table th, .si-plan .si-table td { border-color: #cbd5e1; color: #0f172a; }
.si-plan .si-table th { background: #f1f5f9; }
.si-pill-y { color: #fde68a; } .si-pill-w { color: #fff; } .si-pill-b { color: #a78bfa; }

/* ---------- settings / device ---------- */
.si-settings { display: grid; gap: 12px; max-width: 640px; }
.si-setting { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.si-checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.si-checks li { display: flex; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--line); background: rgba(255,255,255,.03); }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .si-doors { grid-template-columns: 1fr 1fr; }
  .si-player { grid-template-columns: 1fr; }
  .si-stepcard { position: static; }
  .si-gradegrid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 720px) {
  .si-hero { grid-template-columns: 1fr; }
  .si-hero-art { max-width: 150px; order: -1; }
  .si-howknow, .si-sides { grid-template-columns: 1fr; }
  .si-gradegrid { grid-template-columns: repeat(3, 1fr); }
  .si-node { grid-template-columns: 52px 1fr; margin-left: 0 !important; }
  .si-node .bubble { width: 50px; height: 50px; font-size: 24px; }
  .si-node:not(:last-child)::after { left: 38px; }
  .si-node .state { grid-column: 2; justify-self: start; }
  .si-claim { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .si-doors { grid-template-columns: 1fr; }
  .si-door { min-height: 0; }
  .si-truth { font-size: 12px; }
}

/* ---------- print (lesson plans, crosswalks, parent letters) ---------- */
@media print {
  body { background: #fff !important; color: #000 !important; }
  .tw-site-header, .si-strip, .si-crumbs, .si-teacher-tabs, .si-noprint, footer, #tw-legal-footer, .help-widget, [class*="help-"] { display: none !important; }
  .si-main { padding: 0; max-width: none; }
  .si-plan { border: 0; padding: 0; }
}

/* Devanagari breaks apart with wide tracking: keep small headings untracked in Hindi. */
html[lang="hi"] .si-kicker, html[lang="hi"] .si-stepcard .k { letter-spacing: 0; text-transform: none; }