/* Northwind Tutoring: a Nebulm Meet integration demo. Warm, calm, phone-friendly. */
:root {
  --bg: #fbf6ee;
  --bg-2: #f5ede0;
  --surface: #ffffff;
  --ink: #1d2a29;
  --muted: #5d6b68;
  --faint: #8b9794;
  --line: #ebe2d4;
  --brand: #1f6f5c;
  --brand-ink: #13493d;
  --brand-soft: #e2f1eb;
  --accent: #ee7a4f;
  --accent-ink: #b44c26;
  --accent-soft: #fde8dd;
  --sun: #f4b942;
  --danger: #c8443a;
  --danger-soft: #fbe5e2;
  --code-bg: #172120;
  --code-ink: #e9efe9;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 1px 2px rgba(40, 30, 10, .05), 0 8px 28px -12px rgba(40, 30, 10, .18);
  --shadow-lg: 0 2px 4px rgba(40, 30, 10, .04), 0 24px 60px -24px rgba(40, 30, 10, .32);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 var(--sans); -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-underline-offset: 3px; }
a:hover { color: var(--brand-ink); }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; letter-spacing: -.01em; line-height: 1.15; margin: 0; }
p { margin: 0; }
code, pre { font-family: var(--mono); font-variant-ligatures: none; font-feature-settings: "calt" 0, "liga" 0; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--brand) 45%, transparent); outline-offset: 2px; border-radius: 8px; }
[hidden] { display: none !important; }

/* ---- Top bar ---------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.topbar-inner { max-width: 1200px; margin: 0 auto; padding: 12px 20px; display: flex; align-items: center; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-family: var(--serif); font-weight: 700; font-size: 19px; }
.brand:hover { color: var(--ink); }
.brand-mark { width: 32px; height: 32px; flex: none; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a { text-decoration: none; color: var(--muted); font-weight: 500; font-size: 15px; padding: 8px 12px; border-radius: 999px; }
.nav a:hover { color: var(--ink); background: var(--bg-2); }
.nav a.btn-primary, .nav a.btn-primary:hover { color: #fff; background: var(--brand); }
.nav a.btn-primary:hover { background: var(--brand-ink); }
.demo-tag {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; letter-spacing: .02em;
  color: var(--brand-ink); background: var(--brand-soft); border-radius: 999px; padding: 4px 10px; white-space: nowrap;
}
.demo-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }

/* ---- Buttons + inputs ---------------------------------------------------------- */
.btn {
  appearance: none; border: 0; cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 15px/1 var(--sans); padding: 13px 20px; border-radius: 999px; min-height: 46px;
  transition: transform .12s ease, background-color .15s ease, box-shadow .15s ease, opacity .15s;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px -8px color-mix(in srgb, var(--brand) 80%, transparent); }
.btn-primary:hover:not([disabled]) { background: var(--brand-ink); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 6px 18px -8px color-mix(in srgb, var(--accent) 90%, transparent); }
.btn-accent:hover:not([disabled]) { background: var(--accent-ink); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line); }
.btn-ghost:hover:not([disabled]) { background: var(--surface); color: var(--ink); }
.btn-danger { background: var(--danger-soft); color: var(--danger); }
.btn-danger:hover:not([disabled]) { background: var(--danger); color: #fff; }
.btn-sm { min-height: 36px; padding: 9px 14px; font-size: 14px; }
.btn-block { width: 100%; }

.field { display: grid; gap: 6px; }
.field label, .label { font-size: 13.5px; font-weight: 600; color: var(--muted); }
.input {
  width: 100%; font: 16px/1.3 var(--sans); color: var(--ink); background: var(--surface);
  border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px; min-height: 48px;
  transition: border-color .15s, box-shadow .15s;
}
.input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 14%, transparent); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.chip span {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 14px; border-radius: 999px; font-size: 14.5px; font-weight: 500;
  background: var(--surface); border: 1.5px solid var(--line); color: var(--ink); cursor: pointer; transition: all .15s;
}
.chip input:checked + span { background: var(--brand-soft); border-color: var(--brand); color: var(--brand-ink); font-weight: 600; }
.chip input:focus-visible + span { box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 18%, transparent); }

/* ---- Banner (demo not configured) ----------------------------------------------- */
.banner {
  max-width: 1200px; margin: 16px auto 0; padding: 14px 18px; border-radius: var(--radius-sm);
  background: var(--accent-soft); color: var(--accent-ink); display: flex; gap: 12px; align-items: flex-start; font-size: 15px;
}
.banner strong { color: #8a3816; }
.banner code { background: rgba(255, 255, 255, .6); padding: 1px 6px; border-radius: 6px; font-size: 13.5px; }
.banner-wrap { padding: 0 20px; }

/* ---- Landing ------------------------------------------------------------------------ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.hero { padding: 72px 0 48px; display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-ink); }
.hero h1 { font-size: clamp(38px, 5.4vw, 62px); margin: 14px 0 18px; }
.hero h1 em { font-style: italic; color: var(--brand); }
.lede { font-size: 19px; color: var(--muted); max-width: 34em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.status-line { margin-top: 22px; display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--faint); flex: none; }
.dot.ok { background: #2fa36f; box-shadow: 0 0 0 4px rgba(47, 163, 111, .15); }
.dot.warn { background: var(--accent); box-shadow: 0 0 0 4px rgba(238, 122, 79, .16); }

/* The mock lesson in the hero */
.mock { position: relative; }
.mock-window { background: var(--surface); border-radius: 24px; box-shadow: var(--shadow-lg); overflow: hidden; border: 1px solid var(--line); }
.mock-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); display: block; }
.mock-url { margin-left: 8px; background: var(--bg); border-radius: 999px; padding: 4px 12px; font-family: var(--mono); font-size: 12px; }
.mock-body { display: grid; grid-template-columns: 1fr 150px; gap: 14px; padding: 16px; }
.mock-frame { background: #1c2322; border-radius: 16px; padding: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; aspect-ratio: 4 / 3; position: relative; }
.tile { border-radius: 10px; position: relative; display: grid; place-items: center; overflow: hidden; }
.tile:nth-child(1) { background: linear-gradient(140deg, #2f6d5e, #1d4a40); }
.tile:nth-child(2) { background: linear-gradient(140deg, #c86a46, #8d3f22); }
.tile:nth-child(3) { background: linear-gradient(140deg, #4b5f8a, #2c3a5c); }
.tile:nth-child(4) { background: linear-gradient(140deg, #8a6d2d, #5b471c); }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: rgba(255, 255, 255, .92); color: var(--ink); display: grid; place-items: center; font-weight: 700; font-size: 15px; }
.tile-name { position: absolute; left: 8px; top: 6px; font-size: 11px; color: #fff; background: rgba(0, 0, 0, .35); padding: 2px 7px; border-radius: 6px; }
.mock-controls { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 6px; background: rgba(0, 0, 0, .45); padding: 6px; border-radius: 999px; }
.mock-controls b { width: 22px; height: 22px; border-radius: 50%; background: rgba(255, 255, 255, .85); display: block; }
.mock-controls b:last-child { background: #e0574a; }
.mock-side { display: grid; gap: 8px; align-content: start; }
.mock-event { font-size: 11.5px; background: var(--bg); border-radius: 10px; padding: 8px 10px; color: var(--muted); }
.mock-event b { display: block; color: var(--ink); font-family: var(--mono); font-size: 11.5px; }
.mock-badge { position: absolute; top: -14px; right: -10px; background: var(--sun); color: #3d2b00; font-weight: 700; font-size: 13px; padding: 8px 14px; border-radius: 999px; box-shadow: var(--shadow); transform: rotate(4deg); }

.section { padding: 64px 0; }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(30px, 3.6vw, 40px); margin: 10px 0 12px; }
.section-head p { color: var(--muted); font-size: 17.5px; }

.steps { display: grid; gap: 22px; }
.step { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 28px; background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 28px; box-shadow: var(--shadow); align-items: start; }
.step-num { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-weight: 800; font-family: var(--serif); font-size: 20px; color: #fff; background: var(--brand); margin-bottom: 16px; }
.step:nth-child(2) .step-num { background: var(--accent); }
.step:nth-child(3) .step-num { background: var(--sun); color: #3d2b00; }
.step h3 { font-size: 24px; margin-bottom: 10px; }
.step p { color: var(--muted); }
.step ul { margin: 14px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.step li { margin: 4px 0; }
.step code, .prose code { font-size: 13.5px; background: var(--bg-2); padding: 1px 6px; border-radius: 6px; color: var(--ink); }

.code { position: relative; background: var(--code-bg); color: var(--code-ink); border-radius: 16px; overflow: hidden; min-width: 0; }
.code-head { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; font-size: 12.5px; color: #9fb2ad; border-bottom: 1px solid rgba(255, 255, 255, .07); font-family: var(--mono); }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; font-size: 13px; line-height: 1.65; tab-size: 2; }
.code .copy { background: rgba(255, 255, 255, .08); color: #dfe8e5; border: 0; border-radius: 8px; padding: 5px 10px; font: 600 12px var(--sans); cursor: pointer; }
.code .copy:hover { background: rgba(255, 255, 255, .16); }
.k { color: #f6a77f; } .s { color: #b5e0a3; } .c { color: #7f938e; font-style: italic; } .f { color: #8cc8f5; } .t { color: #f6a77f; } .a { color: #f4cf7a; } .n { color: #d8b4fe; }

.events-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.event-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.event-card code { font-weight: 700; font-size: 14px; color: var(--brand-ink); background: var(--brand-soft); padding: 3px 9px; border-radius: 8px; }
.event-card p { margin-top: 10px; color: var(--muted); font-size: 15px; }

.checklist { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.check { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.check h3 { font-family: var(--sans); font-size: 16.5px; margin-bottom: 8px; letter-spacing: 0; }
.check p { color: var(--muted); font-size: 15px; }
.check code { font-size: 13px; background: var(--bg-2); padding: 1px 6px; border-radius: 6px; }

.cta-band { margin: 24px 0 72px; background: var(--brand); color: #fff; border-radius: 28px; padding: 44px; display: flex; gap: 24px; align-items: center; justify-content: space-between; flex-wrap: wrap; position: relative; overflow: hidden; }
.cta-band::after { content: ""; position: absolute; width: 320px; height: 320px; border-radius: 50%; background: rgba(255, 255, 255, .07); right: -80px; top: -120px; }
.cta-band h2 { font-size: clamp(26px, 3vw, 34px); }
.cta-band p { opacity: .85; margin-top: 6px; }
.cta-band .btn { background: #fff; color: var(--brand-ink); position: relative; z-index: 1; }

.footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--faint); font-size: 14px; }
.footer .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---- App pages (session / join) --------------------------------------------------------- */
.app { max-width: 1440px; margin: 0 auto; padding: 20px; display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 20px; align-items: start; }
.stage { background: #1b2221; border-radius: 24px; overflow: hidden; min-height: min(78vh, 760px); position: relative; box-shadow: var(--shadow-lg); display: grid; }
.stage iframe { width: 100%; height: 100%; min-height: min(78vh, 760px); border: 0; display: block; background: #1b2221; }
.stage-empty { display: grid; place-items: center; padding: 32px 20px; background:
  radial-gradient(1200px 500px at 10% -10%, rgba(238, 122, 79, .22), transparent 60%),
  radial-gradient(900px 500px at 110% 110%, rgba(31, 111, 92, .5), transparent 60%), #1b2221; }
.setup { width: 100%; max-width: 440px; background: var(--surface); border-radius: 22px; padding: 28px; box-shadow: var(--shadow-lg); display: grid; gap: 18px; }
.setup h1 { font-size: 28px; }
.setup .sub { color: var(--muted); font-size: 15.5px; margin-top: 6px; }
.setup .fine { font-size: 13px; color: var(--faint); text-align: center; }
.setup .fine code { font-size: 12px; }
.error-box { background: var(--danger-soft); color: var(--danger); border-radius: var(--radius-sm); padding: 12px 14px; font-size: 14.5px; }
.note-box { background: var(--brand-soft); color: var(--brand-ink); border-radius: var(--radius-sm); padding: 12px 14px; font-size: 14.5px; }

.side { display: grid; gap: 16px; position: sticky; top: 80px; height: min(78vh, 760px); grid-template-rows: auto minmax(0, 1fr); grid-auto-rows: auto; }
.side:has(#attendance-card:not([hidden])) { grid-template-rows: auto minmax(0, 1fr) auto; }
.side > .card { overflow: auto; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); min-height: 0; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.card-title { font-family: var(--sans); font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.meeting-title { font-family: var(--serif); font-size: 21px; font-weight: 700; line-height: 1.2; }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: var(--bg-2); color: var(--muted); white-space: nowrap; }
.pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.pill[data-status="active"] { background: #e2f4ea; color: #1d7a4c; }
.pill[data-status="scheduled"] { background: var(--brand-soft); color: var(--brand-ink); }
.pill[data-status="ended"] { background: var(--bg-2); color: var(--muted); }
.share { margin-top: 14px; display: grid; gap: 8px; }
.share-row { display: flex; gap: 8px; }
.share-row .input { font-family: var(--mono); font-size: 13px; min-height: 40px; padding: 8px 12px; background: var(--bg); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

.log-card { display: flex; flex-direction: column; min-height: 220px; }
.log { list-style: none; margin: 0; padding: 0; overflow-y: auto; display: grid; gap: 8px; align-content: start; flex: 1; min-height: 0; }
.log-empty { color: var(--faint); font-size: 14px; padding: 18px 4px; text-align: center; }
.log li { display: grid; gap: 4px; padding: 10px 12px; border-radius: var(--radius-sm); background: var(--bg); animation: pop .25s ease; }
.log .what { font-size: 14px; font-weight: 600; display: flex; align-items: baseline; gap: 8px; }
.log .what .text { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.log time { font-family: var(--mono); font-size: 11px; color: var(--faint); font-weight: 400; white-space: nowrap; }
.log .detail { font-size: 12px; color: var(--muted); font-family: var(--mono); overflow-wrap: anywhere; }
.tag { font-size: 10.5px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; padding: 2px 7px; border-radius: 6px; }
.tag-iframe { background: var(--accent-soft); color: var(--accent-ink); }
.tag-api { background: var(--brand-soft); color: var(--brand-ink); }
.tag-demo { background: var(--bg-2); color: var(--muted); }
@keyframes pop { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.attendance { width: 100%; border-collapse: collapse; font-size: 14px; }
.attendance td { padding: 8px 4px; border-top: 1px solid var(--line); }
.attendance td:last-child { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.role { font-size: 11.5px; color: var(--faint); margin-left: 6px; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); opacity: 0; pointer-events: none; background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 999px; font-size: 14px; font-weight: 600; transition: all .2s ease; z-index: 50; }
.toast.show { opacity: 1; transform: translateX(-50%); }

/* ---- Responsive ---------------------------------------------------------------------------- */
@media (max-width: 1000px) {
  .hero { grid-template-columns: 1fr; padding-top: 44px; gap: 40px; }
  .step { grid-template-columns: 1fr; padding: 22px; gap: 18px; }
  .app { grid-template-columns: 1fr; }
  .side { position: static; height: auto; grid-template-rows: none !important; }
  .log { max-height: 340px; }
}
@media (max-width: 640px) {
  .nav a:not(.btn) { display: none; }
  .demo-tag { display: none; }
  .topbar-inner { padding: 10px 16px; }
  .hero { padding-top: 32px; }
  .lede { font-size: 17px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .mock-body { grid-template-columns: 1fr; }
  .mock-side { display: none; }
  .section { padding: 44px 0; }
  .cta-band { padding: 28px; }
  .app { padding: 10px; gap: 12px; }
  .stage { border-radius: 18px; min-height: calc(100dvh - 84px); }
  .stage iframe { min-height: calc(100dvh - 84px); }
  .setup { padding: 22px; }
  .code pre { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
.app-page .topbar-inner { max-width: 1440px; }