/* Blue Ocean Studio — application stylesheet (tokens from design/tokens-v1, 19 Oct 2026) */
:root{
  --paper:#F6F3EE; --surface:#FFFFFF; --navy:#0B2540; --navy-2:#123559;
  --ink:#15202B; --ink-2:#3C4A58; --muted:#56626F; --faint:#A7B0BA;
  --line:#E4DED4; --line-soft:#EFEAE2; --input:#D6CFC3;
  --blue:#1B5FA6; --blue-2:#154B84; --blue-tint:#EAF1F9; --on-navy:#C9D6E4; --on-navy-2:#8FA6BF;
  --red:#B23A3A; --red-tint:#F9ECEC; --red-text:#7F2A2A;
  --green:#1A6F43; --green-tint:#E6F4EC;
  --brass:#B8923E; --brass-tint:#F7F0E1; --brass-text:#6F5A25;
  --r-ctl:6px; --r-row:8px; --r-panel:10px;
  --sh-panel:0 1px 2px rgba(11,37,64,.05); --sh-card:0 8px 28px -12px rgba(11,37,64,.18),0 1px 2px rgba(11,37,64,.06);
  --sans:"Hanken Grotesk",system-ui,-apple-system,"Segoe UI",sans-serif; --serif:"Source Serif 4",Georgia,serif;
  --topbar:60px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.55 var(--sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;font-variant-numeric:tabular-nums}
a{color:var(--blue)}a:hover{color:var(--blue-2)}
::selection{background:var(--blue);color:#fff}
img{max-width:100%;height:auto}
h1,h2,h3{margin:0;line-height:1.2;color:var(--navy)}
.serif{font-family:var(--serif);font-weight:600;letter-spacing:-.01em}
h1.serif{font-size:34px;line-height:1.15}
.h-sub{font-size:14px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin:22px 0 8px}
.muted{color:var(--muted)}.small{font-size:13px}.tiny{font-size:12px}
p{margin:0 0 12px}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- top bar ---------- */
.topbar{background:var(--navy);color:#fff;height:var(--topbar);display:flex;align-items:center;justify-content:space-between;padding:0 40px;position:sticky;top:0;z-index:20;flex-wrap:wrap}
.topbar .wordmark{font-family:var(--serif);font-size:20px;font-weight:600;letter-spacing:-.01em;color:#fff;text-decoration:none}
.topbar nav{display:flex;gap:4px;font-size:14px;margin-left:36px}
.topbar nav a{color:var(--on-navy);text-decoration:none;padding:8px 12px;border-radius:var(--r-ctl)}
.topbar nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.topbar nav a.on{color:#fff;background:rgba(255,255,255,.10);font-weight:600}
.topbar .left{display:flex;align-items:center}
.topbar .right{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--on-navy)}
.topbar .host{font-size:12px;color:var(--on-navy-2)}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--blue);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:13px}
.avatar.staff{background:var(--brass)}
.banner{background:var(--brass);color:#fff;text-align:center;font-size:13px;font-weight:600;padding:6px 16px}

/* ---------- layout ---------- */
.container{max-width:1120px;width:100%;margin:0 auto;padding:40px 40px 64px}
.container.narrow{max-width:820px}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:28px}
.page-head p{margin:6px 0 0;color:var(--ink-2)}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-2.tight{gap:14px}
@media (max-width:760px){.grid-2{grid-template-columns:1fr}.container{padding:24px 16px 48px}
  .topbar{padding:8px 16px 6px;height:auto;min-height:var(--topbar);display:grid;grid-template-columns:1fr auto;align-items:center;row-gap:2px}
  .topbar .left{display:contents}
  .topbar .wordmark{grid-column:1;grid-row:1}
  .topbar nav{margin-left:-10px;grid-column:1/-1;grid-row:2;gap:0;font-size:13px;overflow-x:auto}
  .topbar nav a{padding:6px 10px;white-space:nowrap}
  .topbar .right{grid-column:2;grid-row:1;gap:10px}
  .topbar .right .host,.topbar .right > span:not(.avatar){display:none}}

/* ---------- cards / panels ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-panel);box-shadow:var(--sh-panel);padding:24px 28px}
.card.navy{background:var(--navy);color:#fff;border-color:var(--navy);box-shadow:0 10px 24px -14px rgba(0,0,0,.35)}
.card.navy .muted{color:var(--on-navy)}
.card + .card{margin-top:24px}
.card h2{font-size:17px;font-weight:600;margin-bottom:12px}
.card h2.serif{font-size:22px}
.rows{display:flex;flex-direction:column}
.row{display:flex;align-items:center;gap:14px;padding:12px 0;border-top:1px solid var(--line-soft);text-decoration:none;color:inherit}
.row:first-child{border-top:0}
.row .grow{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.row .t{font-size:15px;font-weight:600}
.row .s{font-size:13px;color:var(--muted)}

/* ---------- pills / badges ---------- */
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;border-radius:999px;padding:3px 10px;white-space:nowrap}
.pill.ok{background:var(--green-tint);color:var(--green)}
.pill.blue{background:var(--blue-tint);color:var(--blue-2)}
.pill.bad{background:var(--red-tint);color:var(--red-text)}
.pill.soft{background:var(--paper);color:var(--ink-2)}
.pill.line{border:1px solid var(--line);color:var(--muted);background:#fff;font-weight:500}
.pill.brass{background:var(--brass-tint);color:var(--brass-text)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:44px;padding:0 18px;border:1px solid transparent;border-radius:var(--r-ctl);font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;transition:background 160ms ease-out,border-color 160ms ease-out,color 160ms ease-out;white-space:nowrap}
.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-2);color:#fff}
.btn-navy{background:var(--navy);color:#fff}.btn-navy:hover{background:var(--navy-2);color:#fff}
.btn-outline{background:#fff;color:var(--ink-2);border-color:var(--input)}.btn-outline:hover{border-color:var(--muted);color:var(--ink)}
.btn-ghost{background:transparent;color:var(--blue);border-color:var(--on-navy)}.btn-ghost:hover{background:var(--blue-tint)}
.btn-white{background:#fff;color:var(--navy)}.btn-white:hover{background:var(--paper)}
.btn-sm{height:36px;padding:0 12px;font-size:13px}
.btn-block{width:100%}
.btn[disabled],.btn.disabled{background:var(--faint);border-color:var(--faint);color:#fff;cursor:not-allowed}
.link-danger{background:none;border:0;padding:0;color:var(--red);cursor:pointer;font-size:inherit}

/* ---------- forms ---------- */
label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin:14px 0 6px}
label .muted{font-weight:400}
label input,label select,label textarea{display:block;width:100%;margin-top:6px}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],input[type=search],input[type=date],select,textarea{
  height:46px;padding:0 14px;border:1px solid var(--input);border-radius:var(--r-ctl);background:#fff;color:var(--ink);font-size:15px;width:100%}
textarea{height:auto;min-height:120px;padding:12px 14px;resize:vertical}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2356626F' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:34px}
input:focus,select:focus,textarea:focus{outline:2px solid rgba(27,95,166,.35);outline-offset:0;border-color:var(--blue)}
input[type=checkbox],input[type=radio]{width:18px;height:18px;margin:0;accent-color:var(--blue);vertical-align:middle}
.check{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:400;color:var(--ink-2);margin:12px 0}
.form-actions{margin-top:22px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.help{font-size:12px;color:var(--muted);margin-top:6px}
.flash{padding:12px 16px;border-radius:var(--r-row);margin-bottom:18px;font-size:14px;line-height:1.5}
.flash-ok{background:var(--green-tint);color:var(--green)}
.flash-err{background:var(--red-tint);color:var(--red-text)}
.flash-info{background:var(--blue-tint);color:var(--blue-2)}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto}
table.data{width:100%;border-collapse:collapse;font-size:14px}
table.data th{text-align:left;font-size:12px;letter-spacing:.03em;text-transform:uppercase;color:var(--muted);font-weight:600;padding:10px 12px;border-bottom:1px solid var(--line-soft)}
table.data td{padding:12px;border-bottom:1px solid var(--line-soft);vertical-align:middle}
table.data tr:last-child td{border-bottom:0}
table.data td.num,table.data th.num{text-align:right}

/* ---------- auth pages ---------- */
.auth-page{min-height:100vh;display:flex;flex-direction:column;background:var(--paper);position:relative;overflow:hidden}
.auth-page::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 900' preserveAspectRatio='none'%3E%3Cpolyline fill='none' stroke='%231B5FA6' stroke-opacity='.14' stroke-width='2' points='0,640 160,620 320,660 480,560 640,590 800,470 960,500 1120,380 1280,420 1440,300'/%3E%3Cpolyline fill='none' stroke='%23B23A3A' stroke-opacity='.10' stroke-width='2' stroke-dasharray='6 6' points='0,700 160,690 320,710 480,680 640,700 800,660 960,690 1120,650 1280,670 1440,640'/%3E%3C/svg%3E") center/100% 100% no-repeat}
.auth-wrap{position:relative;flex:1;display:flex;flex-direction:column;align-items:center;padding:28px 16px 48px}
.auth-brand{width:100%;max-width:1200px;display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:48px;flex-wrap:wrap}
.auth-brand .wordmark{font-family:var(--serif);font-size:22px;font-weight:600;color:var(--navy)}
.auth-card{width:100%;max-width:440px;padding:40px 40px 32px;box-shadow:var(--sh-card)}
.auth-card h1{font-size:30px;margin-bottom:6px}
.auth-card .lead{font-size:15px;color:var(--ink-2);margin-bottom:6px}
.auth-card label{margin-top:16px}
.auth-card .foot{margin-top:18px;font-size:13px;color:var(--muted);text-align:center}
.auth-footer{position:relative;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:0 48px 24px;font-size:12px;color:var(--muted)}
@media (max-width:560px){.auth-card{padding:28px 20px}.auth-footer{padding:0 16px 16px}}

/* ---------- progress curve (learner home) ---------- */
.curve svg{width:100%;height:auto;display:block}

/* ---------- learn: outline + lesson ---------- */
.learn{display:flex;flex-wrap:wrap;flex:1;min-height:calc(100vh - var(--topbar))}
.outline{width:300px;flex:1 1 300px;max-width:300px;background:#fff;border-right:1px solid var(--line);padding:24px 0;position:sticky;top:var(--topbar);align-self:flex-start;max-height:calc(100vh - var(--topbar));overflow-y:auto}
.outline .head{padding:0 24px 16px;border-bottom:1px solid var(--line-soft);display:flex;flex-direction:column;gap:8px}
.outline .head .title{font-family:var(--serif);font-size:17px;font-weight:600;color:var(--navy)}
.bar{height:4px;background:var(--line-soft);border-radius:999px;overflow:hidden}.bar i{display:block;height:100%;background:var(--blue)}
.bar.lg{height:6px}
.outline .mod{padding:14px 24px 6px;font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);display:flex;justify-content:space-between}
.outline .mod.on{color:var(--navy)}.outline .mod.on .n{color:var(--blue)}.outline .mod.locked{color:var(--faint)}
.outline .mod .n{font-weight:600}
.comp{display:flex;align-items:center;gap:12px;padding:9px 24px;font-size:14px;color:var(--ink);text-decoration:none;border-left:2px solid transparent}
.comp:hover{background:var(--blue-tint);color:var(--ink)}
.comp.on{background:var(--blue-tint);border-left-color:var(--blue);font-weight:600;color:var(--navy)}
.comp.locked{color:var(--faint);pointer-events:none}
.comp .ic{width:20px;height:20px;flex:0 0 20px;border-radius:50%;background:var(--line-soft);color:var(--muted);display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}
.comp.done .ic{background:var(--green);color:#fff}.comp.on .ic{background:var(--blue);color:#fff}
.comp .sub{font-size:12px;color:var(--muted);display:block;font-weight:400}
.lesson{flex:999 1 560px;min-width:0;padding:32px 48px 72px}
.lesson .inner{max-width:820px}
.stepper{display:flex;align-items:center;font-size:13px;flex-wrap:wrap;margin-bottom:28px}
.stepper span{display:flex;align-items:center;color:var(--muted)}
.stepper span::after{content:"";width:22px;height:1px;background:var(--input);margin:0 6px}
.stepper span:last-child::after{display:none}
.stepper span.done{color:var(--green);font-weight:600}.stepper span.done::after{background:var(--green)}
.stepper span.on{color:var(--blue);font-weight:700}
.kicker{font-size:13px;color:var(--muted);margin-bottom:8px}
.lesson h1.serif{margin-bottom:28px}
.prose{font-size:16px;line-height:1.65;color:var(--ink);max-width:72ch}
.prose p{margin:0 0 16px}.prose ol,.prose ul{padding-left:22px;margin:0 0 16px}.prose li{margin:0 0 8px}
.prose h3{font-size:17px;margin:20px 0 8px}
.prose img{border:1px solid var(--line-soft);border-radius:6px;display:block;margin:16px 0}
.video{position:relative;aspect-ratio:16/9;background:var(--navy);border-radius:var(--r-row);overflow:hidden;box-shadow:0 10px 28px -14px rgba(0,0,0,.35)}
.video iframe,.video video{position:absolute;inset:0;width:100%;height:100%;border:0}
.video.placeholder{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;color:var(--on-navy)}
.video.placeholder .play{width:76px;height:76px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(0,0,0,.25)}
.lesson-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:28px;padding-top:18px;border-top:1px solid var(--line-soft)}
.copyright{font-size:12px;color:var(--muted);margin-top:28px}
@media (max-width:900px){.outline{position:static;max-width:none;max-height:none;border-right:0;border-bottom:1px solid var(--line)}.lesson{padding:24px 16px 56px}}

/* ---------- quiz ---------- */
.quiz .q{font-size:16px;line-height:1.6;margin-bottom:16px}
.quiz .dots{display:flex;gap:6px;margin-bottom:16px}
.quiz .dots i{display:block;height:6px;border-radius:999px;flex:1;background:var(--line-soft)}
.quiz .dots i.done{background:var(--green)}.quiz .dots i.on{background:var(--blue)}
.opt{display:flex;align-items:flex-start;gap:14px;width:100%;text-align:left;padding:14px 16px;border:1px solid var(--input);border-radius:var(--r-row);background:#fff;color:var(--ink);font-size:15px;line-height:1.5;cursor:pointer;transition:border-color 160ms ease-out,background 160ms ease-out;margin-bottom:10px}
.opt .mark{flex:0 0 26px;width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;border:1px solid var(--input);color:var(--ink-2);background:#fff}
.opt .body{flex:1;display:flex;flex-direction:column;gap:6px}
.opt .note{font-size:14px;line-height:1.5;color:var(--ink-2)}
.opt:hover{border-color:var(--muted)}
.opt.right{border:1.5px solid var(--green);background:var(--green-tint)}.opt.right .mark{background:var(--green);border-color:var(--green);color:#fff}.opt.right .note{color:var(--green)}
.opt.wrong{border:1.5px solid var(--red);background:var(--red-tint)}.opt.wrong .mark{background:var(--red);border-color:var(--red);color:#fff}.opt.wrong .note{color:var(--red-text)}
.opt.dim{border-color:var(--line-soft);color:var(--muted);cursor:default}.opt.dim .mark{border-color:var(--line-soft);color:var(--muted)}
.opt.picked{border:1.5px solid var(--blue);background:var(--blue-tint)}.opt.picked .mark{background:var(--blue);border-color:var(--blue);color:#fff}
.quiz .status{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line-soft);padding-top:16px;min-height:28px;font-size:13px;color:var(--muted)}
.quiz .status.ok{color:var(--green);font-weight:600}.quiz .status.bad{color:var(--red-text);font-weight:600}
.quiz .done-panel{display:flex;flex-direction:column;gap:12px;padding:8px 0 4px}
.quiz .done-panel .big{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:600;color:var(--green)}

/* ---------- footer ---------- */
.site-footer{padding:24px 40px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}