/* =============================================================================
   SCORM Central UI - design tokens and layout, transcribed from the approved
   Course Builder mockup (docs/design/course-builder-mockup.html).
   ============================================================================= */
:root {
  --ink: #0C1618;          /* darkest, top bar */
  --ink-2: #132325;
  --ink-3: #182527;
  --ink-4: #1B2A2C;
  --ink-line: #2B3739;
  --ink-muted: #3A4749;
  --ink-text: #6E7A7B;
  --ink-text-2: #9BA5A6;
  --ink-text-3: #5D696B;
  --teal: #2DD4BF;         /* accent */
  --teal-deep: #0E7C74;
  --teal-pill-bg: #0F2124;
  --teal-pill-line: #1B3A38;
  --teal-tint: #F4FBFA;
  --teal-tint-line: #DCEDEB;
  --teal-hover-line: #C8D6D4;
  --paper: #FAFAF9;        /* panels */
  --paper-2: #F7F6F4;
  --canvas: #F0EFEC;       /* workspace */
  --line: #E0DFDB;
  --line-2: #EFEEEB;
  --line-3: #E5E4E0;
  --line-dashed: #DDDCD8;
  --text: #0C1618;
  --text-2: #4B5457;
  --text-3: #6B7476;
  --text-4: #8A8F90;
  --text-5: #A3A7A8;
  --text-6: #B4B8B9;
  --text-7: #C0C4C5;
  --warn-bg: #FDF6E7;
  --warn-line: #F0E3C4;
  --danger: #C2410C;
  --font: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body { font-family: var(--font); font-size: 14px; color: var(--text); background: var(--canvas); -webkit-font-smoothing: antialiased; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
a { color: var(--teal-deep); text-decoration: none; }
[hidden] { display: none !important; }
.mono { font-family: var(--mono); }
.label { font-size: 11px; letter-spacing: .07em; text-transform: uppercase; color: var(--text-5); }
.muted { color: var(--text-4); }

/* ---------- auth pages ---------- */
.auth { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--ink); padding: 24px; }
.auth-card { width: 100%; max-width: 420px; background: var(--ink-2); border: 1px solid var(--ink-line); border-radius: 16px; padding: 36px 36px 30px; }
.auth-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 26px; }
.brand-mark { width: 24px; height: 24px; border-radius: 6px; background: var(--ink-4); display: grid; place-items: center; }
.brand-mark i { width: 8px; height: 8px; border-radius: 2px; background: var(--teal); display: block; }
.auth-brand span { color: var(--paper); font-weight: 500; font-size: 14px; }
.auth h1 { color: var(--paper); font-size: 22px; font-weight: 600; letter-spacing: -.02em; margin-bottom: 6px; }
.auth p.sub { color: var(--ink-text); font-size: 13px; margin-bottom: 24px; line-height: 1.5; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 11.5px; color: var(--ink-text-2); margin-bottom: 6px; }
.field input { width: 100%; background: var(--ink); border: 1px solid var(--ink-line); border-radius: 8px; padding: 10px 12px; color: var(--paper); font-size: 14px; outline: none; }
.field input:focus { border-color: var(--teal); }
.btn-primary { display: inline-flex; align-items: center; justify-content: center; width: 100%; background: var(--teal); color: var(--ink); font-weight: 500; font-size: 13.5px; border-radius: 8px; padding: 10px 15px; margin-top: 6px; }
.btn-primary:hover { background: var(--paper); }
.auth .alt { margin-top: 18px; font-size: 12.5px; color: var(--ink-text); }
.auth .alt a { color: var(--teal); }
.alert { border-radius: 8px; padding: 10px 12px; font-size: 12.5px; margin-bottom: 16px; line-height: 1.45; }
.alert-error { background: #2A1417; border: 1px solid #5A2429; color: #F5B8B8; }
.alert-ok { background: var(--teal-pill-bg); border: 1px solid var(--teal-pill-line); color: var(--teal); }

/* ---------- top bar ---------- */
.topbar { height: 52px; flex: none; min-width: 1180px; background: var(--ink); display: flex; align-items: center; padding: 0 16px; gap: 16px; }
.crumbs { display: flex; align-items: center; gap: 10px; }
.crumbs .brand-mark { width: 20px; height: 20px; border-radius: 5px; }
.crumbs .brand-mark i { width: 7px; height: 7px; }
.crumbs a, .crumbs span { font-size: 13px; color: var(--ink-text); }
.crumbs .sep { color: var(--ink-muted); }
.crumbs .current { color: var(--paper); font-weight: 500; }
.crumbs .current[contenteditable] { outline: none; border-bottom: 1px dashed transparent; }
.crumbs .current[contenteditable]:hover, .crumbs .current[contenteditable]:focus { border-bottom-color: var(--ink-text); }
.pill-std { font-family: var(--mono); font-size: 10.5px; color: var(--teal-deep); background: var(--teal-pill-bg); border: 1px solid var(--teal-pill-line); border-radius: 5px; padding: 3px 8px; }
.saved { font-size: 12px; color: var(--ink-text-3); }
.topbar .right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.seg { display: flex; background: var(--ink-3); border-radius: 8px; padding: 3px; }
.seg button { font-size: 12px; color: var(--ink-text-2); border-radius: 6px; padding: 5px 10px; }
.seg button.on { background: var(--ink); color: var(--paper); }
.btn-ghost { font-size: 13px; color: var(--ink-text-2); border: 1px solid var(--ink-line); border-radius: 8px; padding: 7px 14px; }
.btn-ghost:hover { border-color: var(--ink-text-2); color: var(--paper); }
.btn-accent { font-size: 13px; font-weight: 500; color: var(--ink); background: var(--teal); border-radius: 8px; padding: 8px 15px; }
.btn-accent:hover { background: var(--paper); }
.btn-accent[disabled] { opacity: .5; cursor: default; }
.user-chip { font-size: 12px; color: var(--ink-text-2); }
.user-chip form { display: inline; }
.user-chip button { color: var(--ink-text); font-size: 12px; margin-left: 8px; }
.user-chip button:hover { color: var(--paper); }

/* ---------- library ---------- */
.shell { height: 100vh; display: flex; flex-direction: column; overflow-x: auto; overflow-y: hidden; }
.library { flex: 1; overflow-y: auto; padding: 36px; min-width: 1180px; }
.library-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.library-head h1 { font-size: 24px; font-weight: 600; letter-spacing: -.03em; }
.library-head .count { font-family: var(--mono); font-size: 11px; color: var(--text-6); }
.library-head .btn-accent { margin-left: auto; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 18px; display: flex; flex-direction: column; gap: 10px; cursor: pointer; }
.card:hover { border-color: var(--teal-deep); }
.card h3 { font-size: 15px; font-weight: 500; letter-spacing: -.01em; line-height: 1.3; }
.card .desc { font-size: 12.5px; color: var(--text-3); line-height: 1.5; min-height: 18px; }
.card .meta { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 10.5px; color: var(--text-6); margin-top: auto; }
.status { font-family: var(--mono); font-size: 10px; letter-spacing: .06em; border-radius: 5px; padding: 2px 7px; }
.status-DRAFT { background: var(--line-2); color: var(--text-3); }
.status-PUBLISHED { background: var(--teal-tint); color: var(--teal-deep); border: 1px solid var(--teal-tint-line); }
.status-ARCHIVED { background: #F3F3F1; color: var(--text-6); }
.empty { border: 1px dashed var(--line-dashed); border-radius: 12px; padding: 48px; text-align: center; color: var(--text-4); font-size: 13px; }

/* ---------- builder layout ---------- */
.builder { height: 100vh; display: flex; flex-direction: column; background: var(--canvas); overflow-x: auto; overflow-y: hidden; }
.work { flex: 1; display: flex; min-height: 0; min-width: 1180px; }
.outline { width: 252px; flex: none; background: var(--paper); border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.outline-head { padding: 14px 16px 10px; display: flex; align-items: center; justify-content: space-between; }
.outline-head .stat { font-family: var(--mono); font-size: 10.5px; color: var(--text-6); }
.outline-body { flex: 1; overflow-y: auto; padding: 0 10px 10px; }
.lesson-head { display: flex; align-items: center; gap: 6px; padding: 10px 6px 4px; }
.lesson-head .name { flex: 1; font-size: 11.5px; font-weight: 500; color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; outline: none; }
.lesson-head .name:focus { color: var(--text); }
.lesson-head button { color: var(--text-7); font-size: 12px; padding: 0 3px; }
.lesson-head button:hover { color: var(--danger); }
.o-item { display: flex; align-items: center; gap: 8px; padding: 8px 8px; border-radius: 8px; font-size: 13px; color: var(--text-2); cursor: pointer; border: 1px solid transparent; }
.o-item:hover { background: var(--canvas); }
.o-item.on { background: #fff; border-color: var(--line); color: var(--text); }
.o-item .grip { color: #C6CACB; font-size: 11px; letter-spacing: -1px; flex: none; cursor: grab; }
.o-item .ico { font-family: var(--mono); font-size: 10px; color: var(--teal-deep); background: var(--teal-tint); border: 1px solid var(--teal-tint-line); border-radius: 4px; padding: 1px 5px; flex: none; }
.o-item .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.o-item .dot { width: 6px; height: 6px; border-radius: 6px; background: var(--line); flex: none; }
.o-item.on .dot { background: var(--teal); }
.add-dashed { margin-top: 8px; border: 1px dashed var(--line-dashed); border-radius: 8px; padding: 9px; text-align: center; font-size: 12px; color: var(--text-4); cursor: pointer; width: 100%; }
.add-dashed:hover { border-color: var(--teal-deep); color: var(--teal-deep); }
.outline-foot { border-top: 1px solid var(--line-2); padding: 14px 16px; }
.outline-foot .rule { font-size: 12.5px; color: var(--text-2); line-height: 1.55; margin-top: 10px; }
.outline-foot .rule .mono { color: var(--text); }
.bar { margin-top: 10px; display: flex; align-items: center; gap: 7px; }
.bar .track { flex: 1; height: 4px; border-radius: 4px; background: #EAE9E5; overflow: hidden; }
.bar .fill { height: 100%; background: var(--teal-deep); }
.bar .pct { font-family: var(--mono); font-size: 10.5px; color: var(--text-4); }

.center { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--canvas); }
.canvas-head { height: 44px; flex: none; border-bottom: 1px solid var(--line); background: var(--paper-2); display: flex; align-items: center; padding: 0 18px; gap: 10px; }
.type-pill { font-family: var(--mono); font-size: 10.5px; letter-spacing: .06em; color: var(--teal-deep); background: var(--teal-tint); border: 1px solid var(--teal-tint-line); border-radius: 5px; padding: 3px 8px; }
.canvas-head .title { font-size: 13px; font-weight: 500; }
.canvas-head .actions { margin-left: auto; display: flex; gap: 6px; }
.canvas-head .actions button { font-size: 12px; color: var(--text-3); border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: 5px 10px; }
.canvas-head .actions button:hover { border-color: var(--ink); color: var(--ink); }
.canvas-head .actions button.danger:hover { border-color: var(--danger); color: var(--danger); }
.canvas-scroll { flex: 1; overflow-y: auto; padding: 32px; display: flex; justify-content: center; }
.stage { width: 100%; max-width: 900px; background: #fff; border: 1px solid var(--line); border-radius: 14px; align-self: flex-start; transition: max-width .2s; }
.stage.tablet { max-width: 720px; }
.stage.mobile { max-width: 400px; }
.stage-empty { padding: 80px 40px; text-align: center; color: var(--text-4); font-size: 13.5px; line-height: 1.7; }

/* editable surfaces inside the stage */
.ed { border: 1px dashed transparent; border-radius: 6px; outline: none; }
.ed:hover, .ed:focus { border-color: var(--teal-hover-line); }
.ed:empty::before { content: attr(data-placeholder); color: var(--text-6); }
.sec-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; color: var(--teal-deep); margin-bottom: 14px; }
.blk-text { padding: 56px 60px; }
.blk-text .h { font-size: 34px; font-weight: 600; letter-spacing: -.03em; line-height: 1.15; margin-bottom: 20px; }
.blk-text .b { font-size: 16px; line-height: 1.7; color: var(--text-2); max-width: 640px; }
.blk-text .b p { margin-bottom: 1em; }
.drop-hint { margin-top: 36px; border: 1px dashed var(--line-dashed); border-radius: 10px; padding: 14px; text-align: center; font-size: 12.5px; color: var(--text-5); }

.blk-media { padding: 40px 44px; }
.media-frame { background: var(--ink); border-radius: 12px; aspect-ratio: 16/9; display: grid; place-items: center; color: var(--ink-text-2); overflow: hidden; }
.media-frame video, .media-frame img { width: 100%; height: 100%; object-fit: contain; display: block; }
.media-frame .ph { display: flex; flex-direction: column; align-items: center; gap: 10px; font-size: 13px; }
.media-frame .ph i { width: 56px; height: 56px; border-radius: 99px; border: 1.5px solid #465456; display: grid; place-items: center; font-style: normal; font-size: 15px; }
.form-row { margin-top: 18px; display: grid; grid-template-columns: 1fr; gap: 10px; }
.form-row label { font-size: 11.5px; color: var(--text-4); display: block; margin-bottom: 5px; }
.form-row input, .form-row textarea, .inspector input, .inspector select, .inspector textarea { width: 100%; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 9px 11px; font-size: 13px; outline: none; }
.form-row input:focus, .inspector input:focus, .inspector select:focus, .inspector textarea:focus { border-color: var(--teal-deep); }
.form-row textarea { min-height: 90px; resize: vertical; font-family: var(--mono); font-size: 12px; }

.blk-quiz { padding: 52px 60px; }
.blk-quiz .q { font-size: 26px; font-weight: 600; letter-spacing: -.025em; line-height: 1.25; margin-bottom: 28px; max-width: 560px; }
.opts { display: flex; flex-direction: column; gap: 10px; max-width: 560px; }
.opt { display: flex; align-items: center; gap: 12px; border: 1px solid var(--line-3); border-radius: 9px; padding: 11px 13px; }
.opt.correct { border-color: var(--teal-deep); background: var(--teal-tint); }
.opt .mark { width: 22px; height: 22px; border-radius: 22px; border: 1px solid var(--line); display: grid; place-items: center; font-family: var(--mono); font-size: 10.5px; color: var(--text-4); flex: none; cursor: pointer; }
.opt.correct .mark { background: var(--teal-deep); border-color: var(--teal-deep); color: #fff; }
.opt .t { font-size: 14.5px; flex: 1; }
.opt .hint { font-size: 11px; color: var(--text-6); }
.opt .x { color: var(--text-7); font-size: 12px; }
.opt .x:hover { color: var(--danger); }
.add-inline { border: 1px dashed var(--line-dashed); border-radius: 9px; padding: 11px; text-align: center; font-size: 12.5px; color: var(--text-5); cursor: pointer; width: 100%; }
.add-inline:hover { border-color: var(--teal-deep); color: var(--teal-deep); }
.feedback { margin-top: 30px; max-width: 560px; border-top: 1px solid var(--line-2); padding-top: 20px; }
.feedback .box { font-size: 14px; line-height: 1.6; color: var(--text-2); background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 9px; padding: 14px; margin-top: 10px; }

.blk-branch { padding: 44px 48px; }
.blk-branch .q { font-size: 22px; font-weight: 600; letter-spacing: -.02em; line-height: 1.3; margin-bottom: 28px; max-width: 520px; }
.paths { display: grid; grid-template-columns: 200px 1fr; }
.path-node { border: 1px solid var(--line-3); border-radius: 8px; padding: 10px 12px; font-size: 13.5px; margin-bottom: 14px; background: var(--paper); }
.path-node.correct { border-color: var(--teal-deep); background: var(--teal-tint); }
.path-out { display: flex; align-items: center; gap: 14px; padding: 0 0 14px 22px; border-left: 1px solid var(--line-3); margin-left: -1px; }
.path-out .arrow { font-family: var(--mono); font-size: 10.5px; color: var(--text-6); }
.path-out .o { flex: 1; font-size: 13.5px; color: var(--text-2); }
.path-out .score { font-family: var(--mono); font-size: 10.5px; color: var(--text-4); width: 56px; border: 0; background: transparent; }
.path-out .x { color: var(--text-7); font-size: 12px; }

.blk-cert { padding: 48px 56px; }
.cert { border: 1px solid var(--line-3); border-radius: 12px; padding: 52px; text-align: center; background: #FCFCFB; }
.cert .k { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; color: var(--text-4); margin-bottom: 22px; }
.cert .n { font-size: 30px; font-weight: 600; letter-spacing: -.03em; margin-bottom: 10px; }
.cert .s { font-size: 14px; color: var(--text-2); margin-bottom: 30px; }
.cert .f { display: flex; justify-content: center; gap: 56px; font-size: 12px; color: var(--text-4); }
.cert .f b { display: block; color: var(--text); font-size: 13.5px; font-weight: 400; margin-bottom: 3px; }
.tokens { margin-top: 20px; display: flex; gap: 10px; flex-wrap: wrap; }
.tokens span { font-family: var(--mono); font-size: 11px; color: var(--text-2); background: var(--teal-tint); border: 1px solid var(--teal-tint-line); border-radius: 6px; padding: 5px 9px; }

.blk-quote { padding: 56px 60px; }
.blk-quote .q { font-size: 26px; font-weight: 500; letter-spacing: -.02em; line-height: 1.35; color: var(--text); border-left: 3px solid var(--teal); padding-left: 22px; }
.blk-quote .a { margin-top: 16px; font-size: 13px; color: var(--text-4); padding-left: 25px; }

.blk-generic { padding: 40px 44px; }
.blk-generic textarea { width: 100%; min-height: 320px; font-family: var(--mono); font-size: 12px; line-height: 1.6; border: 1px solid var(--line); border-radius: 10px; padding: 14px; outline: none; }
.blk-generic textarea:focus { border-color: var(--teal-deep); }
.blk-generic .err { color: var(--danger); font-size: 12px; margin-top: 8px; min-height: 16px; }

.palette { flex: none; border-top: 1px solid var(--line); background: var(--paper); padding: 11px 18px; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.palette .label { margin-right: 6px; }
.chip { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--text-2); border: 1px solid var(--line); background: #fff; border-radius: 7px; padding: 6px 11px; cursor: pointer; }
.chip:hover { border-color: var(--teal-deep); color: var(--teal-deep); }
.chip i { font-family: var(--mono); font-style: normal; font-size: 10px; color: var(--text-5); }
.palette select { font-size: 12.5px; color: var(--text-2); border: 1px solid var(--line); background: #fff; border-radius: 7px; padding: 6px 9px; }

.inspector { width: 308px; flex: none; background: var(--paper); border-left: 1px solid var(--line); display: flex; flex-direction: column; }
.tabs { display: flex; padding: 10px 12px 0; gap: 2px; border-bottom: 1px solid var(--line); }
.tabs button { font-size: 12.5px; color: var(--text-4); padding: 8px 10px; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button.on { color: var(--text); border-bottom-color: var(--ink); }
.insp-body { flex: 1; overflow-y: auto; padding: 18px 16px; }
.insp-body .f { margin-bottom: 18px; }
.insp-body .f label { font-size: 11.5px; color: var(--text-4); display: block; margin-bottom: 6px; }
.swatches { display: flex; gap: 7px; }
.swatch { width: 26px; height: 26px; border-radius: 7px; cursor: pointer; border: 2px solid transparent; }
.swatch.on { border-color: var(--ink); }
.kv { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 12px; }
.kv .k { font-size: 12.5px; color: var(--text-2); }
.kv .v { font-family: var(--mono); font-size: 11px; background: var(--canvas); border-radius: 5px; padding: 3px 7px; }
.note { font-size: 12.5px; color: var(--text-2); line-height: 1.6; background: var(--teal-tint); border: 1px solid var(--teal-tint-line); border-radius: 9px; padding: 12px; margin-bottom: 16px; }
.code { font-family: var(--mono); font-size: 10.5px; line-height: 1.8; color: var(--text-2); background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 11px; white-space: pre-wrap; }
.rule-card { border: 1px solid var(--line); background: #fff; border-radius: 9px; padding: 12px 13px; font-size: 12.5px; line-height: 1.65; color: var(--text-2); margin-bottom: 10px; }
.rule-card .when { font-family: var(--mono); font-size: 11px; color: var(--teal-deep); }
.insp-foot { border-top: 1px solid var(--line-2); padding: 13px 16px; display: flex; align-items: center; gap: 9px; font-size: 12px; color: var(--text-2); }
.insp-foot i { width: 7px; height: 7px; border-radius: 9px; background: var(--teal-deep); flex: none; }

/* ---------- toast ---------- */
.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--paper); font-size: 12.5px; border-radius: 8px; padding: 9px 14px; opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 50; }
.toast.on { opacity: 1; }
.toast.err { background: #7F1D1D; }

/* ---------- preview ---------- */
.preview { max-width: 900px; margin: 40px auto; background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.preview .lesson-title { font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; color: var(--teal-deep); padding: 28px 60px 0; }
.preview .blk-text, .preview .blk-quiz, .preview .blk-branch, .preview .blk-cert, .preview .blk-quote, .preview .blk-media { border-bottom: 1px solid var(--line-2); }

/* ---------- modal (import / export) ---------- */
.modal-back { position: fixed; inset: 0; background: rgba(12, 22, 24, .55); display: flex; align-items: center; justify-content: center; z-index: 40; }
.modal { width: 520px; max-width: calc(100vw - 32px); max-height: calc(100vh - 48px); overflow-y: auto; background: #fff; border-radius: 14px; border: 1px solid var(--line); box-shadow: 0 30px 80px rgba(0,0,0,.25); }
.modal-head { display: flex; align-items: center; padding: 18px 22px 0; }
.modal-head h2 { font-size: 17px; font-weight: 600; letter-spacing: -.02em; }
.modal-head .x { margin-left: auto; font-size: 18px; color: var(--text-4); padding: 4px 8px; border-radius: 6px; }
.modal-head .x:hover { background: var(--canvas); color: var(--text); }
.modal-body { padding: 16px 22px 22px; }
.modal-body .f { margin-bottom: 16px; }
.modal-body .f label { font-size: 11.5px; color: var(--text-4); display: block; margin-bottom: 6px; }
.modal-body input[type=text], .modal-body input[type=number], .modal-body select { width: 100%; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 9px 11px; font-size: 13px; outline: none; }
.modal-body input:focus, .modal-body select:focus { border-color: var(--teal-deep); }
.modal-foot { display: flex; align-items: center; gap: 10px; margin-top: 6px; }
.modal-foot .spacer { flex: 1; }
.modal .btn-dark { font-size: 13px; font-weight: 500; color: var(--paper); background: var(--ink); border-radius: 8px; padding: 9px 16px; }
.modal .btn-dark[disabled] { opacity: .45; cursor: default; }
.modal .btn-line { font-size: 13px; color: var(--text-2); border: 1px solid var(--line); border-radius: 8px; padding: 8px 14px; background: #fff; }
.modal .btn-line:hover { border-color: var(--text-4); color: var(--text); }
.file-drop { border: 1.5px dashed var(--line-dashed); border-radius: 12px; padding: 26px 18px; text-align: center; color: var(--text-4); font-size: 13px; cursor: pointer; background: var(--paper); }
.file-drop:hover, .file-drop.over { border-color: var(--teal-deep); background: var(--teal-tint); color: var(--teal-deep); }
.file-drop b { display: block; color: var(--text); font-weight: 500; font-size: 14px; margin-bottom: 4px; }
.file-drop input { display: none; }
.file-drop .picked { font-family: var(--mono); font-size: 12px; color: var(--teal-deep); margin-top: 6px; word-break: break-all; }
.choice { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.choice label { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; cursor: pointer; font-size: 13.5px; display: block; }
.choice label small { display: block; color: var(--text-4); font-size: 11.5px; margin-top: 3px; }
.choice input { margin-right: 8px; }
.choice label.on { border-color: var(--ink); background: var(--teal-tint); }
.prog { margin-top: 14px; }
.prog .track { height: 6px; background: var(--line-2); border-radius: 6px; overflow: hidden; }
.prog .fill { height: 100%; background: var(--teal-deep); width: 0; transition: width .4s; }
.prog .msg { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-4); margin-top: 6px; }
.prog.fail .fill { background: #B91C1C; }
.prog.fail .msg { color: #B91C1C; }
.findings { margin-top: 12px; font-size: 12.5px; }
.findings div { padding: 6px 10px; border-radius: 7px; margin-bottom: 5px; background: var(--paper); border: 1px solid var(--line-2); color: var(--text-2); }
.findings .ERROR { background: #FEF2F2; border-color: #FECACA; color: #991B1B; }
.findings .WARN { background: var(--warn-bg, #FDF6E7); border-color: #F0E3C4; color: #92400E; }
.versions { margin-top: 18px; border-top: 1px solid var(--line-2); padding-top: 14px; }
.versions h4 { font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; color: var(--text-4); margin-bottom: 10px; }
.versions .row { display: flex; align-items: center; gap: 10px; font-size: 13px; padding: 8px 0; border-bottom: 1px solid var(--line-2); }
.versions .row .v { font-family: var(--mono); font-size: 12px; color: var(--text-3); width: 34px; }
.versions .row .std { color: var(--text-2); flex: 1; }
.versions .row .sz { font-family: var(--mono); font-size: 11.5px; color: var(--text-4); }
.versions .row a { color: var(--teal-deep); font-weight: 500; text-decoration: none; }
.versions .row .st { font-family: var(--mono); font-size: 10.5px; letter-spacing: .05em; color: var(--text-4); }
.library-head .btn-ghost-dark { font-size: 13px; color: var(--text-2); border: 1px solid var(--line); border-radius: 8px; padding: 7px 14px; background: #fff; margin-left: auto; }
.library-head .btn-ghost-dark:hover { border-color: var(--text-4); color: var(--text); }
.library-head .btn-ghost-dark + .btn-accent { margin-left: 8px; }
.media-tools { display: flex; gap: 8px; align-items: center; margin-top: 10px; }
.media-tools .btn-up { font-size: 12.5px; color: var(--text-2); border: 1px solid var(--line); border-radius: 7px; padding: 6px 12px; background: #fff; cursor: pointer; }
.media-tools .btn-up:hover { border-color: var(--teal-deep); color: var(--teal-deep); }
.media-tools .btn-up input { display: none; }
.media-tools .hint { font-size: 11.5px; color: var(--text-4); }

/* ---------- demo workspace strip ---------- */
.demo-strip { display:flex; align-items:center; gap:12px; background:var(--teal); color:var(--ink); font-size:12.5px; padding:7px 18px; }
.demo-strip b { font-family:var(--mono); font-size:10.5px; letter-spacing:.12em; background:var(--ink); color:var(--teal); border-radius:4px; padding:2px 7px; }
.demo-strip .mono { font-family:var(--mono); }
.demo-strip a { margin-left:auto; color:var(--ink); font-weight:600; text-decoration:none; white-space:nowrap; }
.demo-strip a:hover { text-decoration:underline; }
.builder .demo-strip { grid-column: 1 / -1; }