:root {
  --canvas: #F6F8F8; --card: #FBFCFC; --tint: #F0F3F3;
  --teal: #3D8C84; --teal-d: #327369; --teal-soft: rgba(61,140,132,.10);
  --gold: #A0845C; --red: #C44B4B; --amber: #C4890A; --green: #3D8C6A; --purple: #624EA0;
  --t1: #1A1A1A; --t2: #6B6B6B; --t3: #9B9B9B;
  --ln: rgba(0,0,0,.06); --ln2: rgba(0,0,0,.10);
  --r: 14px; --clara-w: 392px; --top: 0px; --rail-w: 232px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font: 14px/1.6 Inter, system-ui, 'Segoe UI', sans-serif; color: var(--t1); background: var(--canvas); -webkit-font-smoothing: antialiased; }
h1, h2, h3 { font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 600; margin: 0; letter-spacing: -.01em; }
h1 { font-size: 40px; line-height: 1.1; } h2 { font-size: 28px; } h3 { font-size: 20px; }
button { font: inherit; cursor: pointer; }
a { color: var(--teal-d); }
.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }
.label { font-size: 11px; letter-spacing: .09em; text-transform: uppercase; color: var(--t3); }

/* top bar */
.chip { white-space: nowrap; }
.spacer { flex: 1; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; padding: 4px 10px; border-radius: 99px; border: 1px solid var(--ln2); background: var(--card); color: var(--t2); }
.chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--t3); }
.chip.live .dot { background: var(--green); } .chip.off .dot { background: var(--amber); }
.btn { border: 1px solid var(--ln2); background: var(--card); color: var(--t1); padding: 8px 16px; border-radius: 10px; font-size: 13px; transition: .15s; }
.btn:hover { border-color: var(--teal); color: var(--teal-d); }
.btn.primary { background: var(--teal); border-color: var(--teal); color: #fff; } .btn.primary:hover { background: var(--teal-d); color: #fff; }
.btn.ghost { border-color: transparent; background: transparent; color: var(--t2); } .btn.sm { padding: 5px 11px; font-size: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

main { padding: calc(var(--top) + 28px) 36px 80px; max-width: 1240px; margin: 0 auto; transition: margin .25s; }
@media (min-width: 1000px) { body.clara-open main { margin-right: var(--clara-w); margin-left: 0; max-width: none; } body.clara-open .view-learn { max-width: none; } }
.card { background: var(--card); border: 1px solid var(--ln); border-radius: var(--r); box-shadow: 0 2px 8px rgba(0,0,0,.03); }
.pad { padding: 22px; }
.row { display: flex; gap: 16px; align-items: center; } .wrap { flex-wrap: wrap; } .col { display: flex; flex-direction: column; gap: 12px; }
.grid { display: grid; gap: 16px; } .g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } .g5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid > *, .row > * { min-width: 0; }
.muted { color: var(--t2); } .small { font-size: 12px; }
.tag { font-size: 11px; padding: 3px 9px; border-radius: 99px; background: var(--teal-soft); color: var(--teal-d); }
.tag.gold { background: rgba(160,132,92,.12); color: var(--gold); } .tag.grey { background: var(--tint); color: var(--t2); }
.tag.red { background: rgba(196,75,75,.1); color: var(--red); } .tag.green { background: rgba(61,140,106,.12); color: var(--green); } .tag.amber { background: rgba(196,137,10,.12); color: var(--amber); }

/* home */
.hero { display: grid; grid-template-columns: 1fr 220px; gap: 32px; align-items: center; padding: 34px; background: radial-gradient(1200px 300px at 90% -20%, rgba(61,140,132,.14), transparent), radial-gradient(600px 200px at 0% 120%, rgba(160,132,92,.12), transparent), var(--card); }
.hero h1 em { color: var(--teal); font-style: italic; }
.ring { position: relative; width: 160px; height: 160px; margin: auto; }
.ring svg { transform: rotate(-90deg); } .ring .v { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; }
.ring .v b { font: 600 34px 'Cormorant Garamond', serif; display: block; line-height: 1; }
.pillar { padding: 16px; } .pillar b { display: block; font: 600 18px 'Cormorant Garamond', serif; color: var(--teal-d); }
.module { padding: 22px; } .module.soon { background: var(--tint); border-style: dashed; }
.module .n { font: 600 34px 'Cormorant Garamond', serif; color: var(--teal); width: 40px; }
.step { display: flex; align-items: center; gap: 14px; padding: 12px 14px; border: 1px solid var(--ln); border-radius: 12px; background: #fff; text-decoration: none; color: inherit; transition: .15s; }
.step:hover { border-color: var(--teal); transform: translateY(-1px); }
.step .k { width: 74px; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--gold); }
.step .st { margin-left: auto; }
.topics { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }

/* learn */
.player { position: relative; aspect-ratio: 16/9; background: #0f1b1c; border-radius: var(--r); overflow: hidden; }
.player #ytp, .player iframe { position: absolute; inset: 0; width: 100%; height: 100%; }
.sim { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 8% 10%; text-align: center; color: #e8f2f1; background: linear-gradient(135deg, #14282a, #0f1b1c); }
.sim .cap { font: 500 clamp(18px, 2.4vw, 30px)/1.4 'Cormorant Garamond', serif; min-height: 4.2em; }
.sim .note { position: absolute; top: 12px; left: 14px; font-size: 11px; letter-spacing: .06em; color: #8fb9b4; text-transform: uppercase; }
.sim .ctl { position: absolute; bottom: 14px; display: flex; gap: 10px; align-items: center; }
.sim .ctl button { background: rgba(255,255,255,.12); border: 0; color: #fff; padding: 8px 16px; border-radius: 99px; }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.ov-type { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.ov-type.prediction { color: var(--purple); } .ov-type.key_moment { color: var(--teal-d); } .ov-type.application { color: var(--gold); }
textarea { width: 100%; font: inherit; padding: 12px 14px; border: 1px solid var(--ln2); border-radius: 12px; background: #fff; resize: vertical; min-height: 84px; }
textarea:focus { outline: 2px solid var(--teal-soft); border-color: var(--teal); }
.jol { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 12px 0; }
.jol button { padding: 5px 12px; border-radius: 99px; border: 1px solid var(--ln2); background: #fff; font-size: 12px; color: var(--t2); }
.jol button.on { background: var(--teal); border-color: var(--teal); color: #fff; }
.result { margin-top: 12px; padding: 14px 16px; border-radius: 12px; background: #fff; border: 1px solid var(--ln); }
.score { font: 600 28px 'Cormorant Garamond', serif; }
.nudge { display: none; margin-top: 12px; padding: 12px 16px; border-radius: 12px; background: rgba(196,137,10,.09); border: 1px solid rgba(196,137,10,.3); align-items: center; gap: 14px; }
.nudge.on { display: flex; animation: rise .3s; }

.tl { padding: 16px 18px 12px; }
.ribbon { position: relative; height: 70px; margin-top: 8px; cursor: pointer; user-select: none; }
.bars { position: absolute; inset: 0; display: flex; align-items: flex-end; gap: 1px; }
.bars i { flex: 1; border-radius: 2px 2px 0 0; min-height: 3px; }
.b-beginner { background: #9FD0CA; } .b-intermediate { background: #E2B65A; } .b-dense { background: var(--red); opacity: .85; }
.chap-tick { position: absolute; top: 0; bottom: 0; width: 1px; background: rgba(0,0,0,.1); }
.pip { position: absolute; top: -9px; width: 14px; height: 14px; margin-left: -7px; border-radius: 50%; border: 2px solid #fff; box-shadow: 0 0 0 1px var(--ln2); z-index: 2; }
.pip.prediction { background: var(--purple); } .pip.key_moment { background: var(--teal); } .pip.application { background: var(--gold); }
.pip.done { box-shadow: 0 0 0 2px var(--green); } .pip:hover { transform: scale(1.25); }
.playhead { position: absolute; top: -6px; bottom: -4px; width: 2px; background: var(--t1); z-index: 3; pointer-events: none; }
.tip { position: absolute; bottom: 78px; transform: translateX(-50%); background: var(--t1); color: #fff; font-size: 11px; padding: 6px 9px; border-radius: 8px; pointer-events: none; white-space: nowrap; display: none; z-index: 6; }
.legend { display: flex; gap: 14px; font-size: 11px; color: var(--t2); margin-top: 8px; flex-wrap: wrap; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }
.gauge { height: 6px; background: var(--tint); border-radius: 99px; overflow: hidden; width: 120px; } .gauge i { display: block; height: 100%; background: var(--teal); transition: width .4s, background .4s; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--ln); padding: 0 12px; }
.tabs button { background: none; border: 0; padding: 12px 14px; color: var(--t2); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; border-bottom: 2px solid transparent; }
.tabs button.on { color: var(--teal-d); border-color: var(--teal); }
.tabbody { max-height: 360px; overflow: auto; padding: 8px; }
.item { display: flex; gap: 12px; padding: 9px 12px; border-radius: 10px; cursor: pointer; align-items: baseline; }
.item:hover { background: var(--tint); } .item.cur { background: var(--teal-soft); }
.item .tm { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--t3); width: 42px; flex: none; }
.loaddot { width: 8px; height: 8px; border-radius: 50%; flex: none; margin-top: 7px; }

/* assessment */
.narrow { max-width: 780px; margin: 0 auto; }
.bar { height: 6px; background: var(--tint); border-radius: 99px; overflow: hidden; } .bar i { display: block; height: 100%; background: var(--teal); transition: width .3s; }
.opt { display: flex; gap: 12px; align-items: flex-start; width: 100%; text-align: left; padding: 13px 16px; margin-top: 10px; border: 1px solid var(--ln2); border-radius: 12px; background: #fff; transition: .12s; }
.opt:hover:not(:disabled) { border-color: var(--teal); } .opt.sel { border-color: var(--teal); background: var(--teal-soft); }
.opt.ok { border-color: var(--green); background: rgba(61,140,106,.1); } .opt.bad { border-color: var(--red); background: rgba(196,75,75,.08); }
.opt b { font-family: 'JetBrains Mono', monospace; color: var(--t3); font-weight: 500; }
.crit { display: grid; grid-template-columns: 170px 1fr 44px; gap: 12px; align-items: center; margin: 10px 0; }
table { width: 100%; border-collapse: collapse; font-size: 13px; } th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--ln); vertical-align: top; }
th { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--t3); font-weight: 500; }
.stage { display: flex; gap: 12px; align-items: center; padding: 12px 14px; border: 1px solid var(--ln); border-radius: 12px; background: #fff; }
.stage .ck { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--ln2); display: grid; place-items: center; font-size: 12px; color: #fff; flex: none; }
.stage.done .ck { background: var(--green); border-color: var(--green); } .stage.run .ck { border-color: var(--teal); animation: pulse 1s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 5px var(--teal-soft); } }
.stat b { font: 600 30px 'Cormorant Garamond', serif; color: var(--teal-d); display: block; line-height: 1; }
code, .code { background: var(--tint); padding: 1px 6px; border-radius: 5px; font-size: 12px; }
input[type=text] { font: inherit; padding: 9px 12px; border: 1px solid var(--ln2); border-radius: 10px; background: #fff; width: 100%; }

/* Clara dock */
#clara { position: fixed; top: var(--top); right: 0; bottom: 0; width: var(--clara-w); background: var(--card); border-left: 1px solid var(--ln); display: flex; flex-direction: column; transform: translateX(100%); transition: transform .25s; z-index: 20; box-shadow: -8px 0 30px rgba(0,0,0,.04); }
body.clara-open #clara { transform: none; }
#clara header { padding: 14px 18px; border-bottom: 1px solid var(--ln); display: flex; align-items: center; gap: 10px; }
.orb { width: 30px; height: 30px; border-radius: 50%; background: radial-gradient(circle at 30% 30%, #8fd0c8, var(--teal)); box-shadow: 0 0 0 4px var(--teal-soft); flex: none; }
#msgs { flex: 1; overflow: auto; padding: 16px 18px; display: flex; flex-direction: column; gap: 12px; }
.m { max-width: 92%; padding: 10px 13px; border-radius: 14px; font-size: 13px; line-height: 1.55; }
.m.u { align-self: flex-end; background: var(--teal); color: #fff; border-bottom-right-radius: 4px; }
.m.a { align-self: flex-start; background: #fff; border: 1px solid var(--ln); border-bottom-left-radius: 4px; }
.m.a p { margin: 0 0 6px; } .m.a ul { margin: 4px 0 6px 18px; padding: 0; }
.ts { font: 500 11px 'JetBrains Mono', monospace; background: var(--teal-soft); color: var(--teal-d); border: 0; border-radius: 6px; padding: 1px 6px; cursor: pointer; }
.srcs { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; } .srcs .lab { font-size: 10px; color: var(--t3); letter-spacing: .06em; text-transform: uppercase; align-self: center; }
.m.g { align-self: flex-start; background: rgba(196,137,10,.09); border: 1px solid rgba(196,137,10,.25); }
#chips { padding: 0 18px 8px; display: flex; gap: 6px; flex-wrap: wrap; }
#chips button { font-size: 12px; padding: 5px 11px; border-radius: 99px; border: 1px solid var(--ln2); background: #fff; color: var(--t2); } #chips button:hover { border-color: var(--teal); color: var(--teal-d); }
#cform { display: flex; gap: 8px; padding: 12px 18px 16px; border-top: 1px solid var(--ln); }
#cform input { flex: 1; min-width: 0; font: inherit; padding: 10px 14px; border: 1px solid var(--ln2); border-radius: 99px; background: #fff; } #cform input:focus { outline: 2px solid var(--teal-soft); border-color: var(--teal); }
#fab { position: fixed; right: 22px; bottom: 22px; z-index: 19; display: flex; gap: 10px; align-items: center; padding: 10px 18px 10px 12px; background: var(--card); border: 1px solid var(--ln2); border-radius: 99px; box-shadow: 0 6px 24px rgba(0,0,0,.08); }
body.clara-open #fab { display: none; }
.typing i { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--t3); margin-right: 3px; animation: bl 1s infinite; } .typing i:nth-child(2) { animation-delay: .15s; } .typing i:nth-child(3) { animation-delay: .3s; }
@keyframes bl { 50% { opacity: .2; } }
@media (max-width: 900px) { .g2, .g3, .g5, .hero { grid-template-columns: 1fr; } :root { --clara-w: 100vw; } }