/* FCB.ai × SICTOM — pitch v2. Editorial "dossier" aesthetic, airline-format logic.
   Skeleton (shell/rail/gate/dark/count-up) mirrors the FCB airlines deck,
   re-skinned to the SICTOM green palette. Dark chapters use a deep-green theme. */

:root{
  /* Paper-light (Ch 1-4) */
  --paper: #F6F3EA;
  --paper-2: #FFFFFF;
  --paper-line: #EAE3D5;
  --ink: #16211C;
  --ink-90: rgba(22,33,28,.90);
  --ink-70: rgba(22,33,28,.70);
  --ink-55: rgba(22,33,28,.55);
  --ink-40: rgba(22,33,28,.40);
  --ink-25: rgba(22,33,28,.25);
  --ink-10: rgba(22,33,28,.10);
  --ink-05: rgba(22,33,28,.05);
  --line: rgba(22,33,28,.10);

  /* primary = SICTOM vert (plays the airline "teal" role) */
  --teal: #2F7D54;
  --teal-deep: #1E5E3D;
  --teal-tint: #E7F1EA;
  /* accent = warm ocre (plays the airline "amber" role) */
  --amber: #C28A2A;
  --amber-soft: #DDA94B;
  --amber-tint: #F4E8CE;
  --coral: #C2425F;
  --coral-tint: #FCE7EF;
  --sky: #1C4E86;
  --sky-tint: #E7EEF8;
  --grass: #1E7B45;
  --grass-tint: #E4F2E9;

  /* Dark chapters (Ch 5-6) — names kept as --fcb-* so the airline .dark rules
     work unchanged; values re-skinned to deep green. */
  --fcb-bg: #0C2018;
  --fcb-surface: #102A1F;
  --fcb-panel: #163828;
  --fcb-text: #EAF3EC;
  --fcb-muted: #9DBCA8;
  --fcb-line: rgba(234,243,236,.10);
  --fcb-line-strong: rgba(234,243,236,.18);
  --fcb-violet: #3E9E68;     /* dark-mode accent → green */
  --fcb-violet-soft: #6FC593;
  --fcb-blue: #3D7FB0;
  --fcb-pink: #C9912E;
  --fcb-gold: #E0AE4E;
  --fcb-gradient: linear-gradient(90deg, #6FC593 0%, #2F7D54 35%, #3D7FB0 70%, #E0AE4E 100%);

  --rail-w: 296px;
  --shell-pad-x: clamp(28px, 5vw, 80px);

  /* WhatsApp demo */
  --wa-head:#075E54; --wa-accent:#25D366; --wa-bg:#ECE5DD; --wa-out:#DCF8C6; --wa-in:#fff;
}

*{box-sizing:border-box}
html, body, #root{height:100%}
html, body{
  margin:0; background: var(--paper); color: var(--ink);
  font-family: 'Inter','Helvetica Neue', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased; letter-spacing: -.005em;
}
::selection{background: var(--amber-soft); color: var(--ink)}

.font-display-it{ font-family: 'Newsreader','Times New Roman', serif; font-style: italic; font-weight: 500; }
.eyebrow{ font-family:'JetBrains Mono',monospace; font-size:11px; letter-spacing:.22em; text-transform:uppercase; font-weight:600; color:var(--teal); }
.page-fade{ opacity: 1; }
.tabular{ font-variant-numeric: tabular-nums; }

/* ---- App shell ---- */
.app{ min-height:100vh; background:var(--paper); padding-left:var(--rail-w); }
@media (max-width: 900px){ .app{ padding-left:0; padding-top:56px; } :root{ --shell-pad-x:22px; } }
.canvas{ height:100vh; overflow-y:auto; scroll-behavior:smooth; }
.canvas::-webkit-scrollbar{ width:10px; }
.canvas::-webkit-scrollbar-thumb{ background:var(--ink-10); border-radius:999px; }
.canvas::-webkit-scrollbar-track{ background:transparent; }
.canvas.dark::-webkit-scrollbar-thumb{ background:rgba(234,243,236,.16); }
.canvas.dark{ background:var(--fcb-bg); }

/* ---- Rail ---- */
.rail{ position:fixed; left:0; top:0; bottom:0; width:var(--rail-w);
  display:flex; flex-direction:column; border-right:1px solid var(--line);
  background:var(--paper-2); z-index:50;
  transition:background .35s ease, border-color .35s ease, color .35s ease; }
.rail.dark{ background:var(--fcb-surface); border-right-color:var(--fcb-line); color:var(--fcb-text); }
.rail-head{ display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
  padding:22px 22px 18px; border-bottom:1px solid var(--line); }
.rail.dark .rail-head{ border-bottom-color:var(--fcb-line); }
.rail-brand{ display:flex; flex-direction:row; align-items:center; gap:10px; min-width:0; }
.rail-brand-img{ display:block; height:30px; width:auto; margin:-2px 0 -2px -2px; }
.rail.dark .rail-brand-img{ filter:brightness(0) invert(1) opacity(.92); }
.rail-brand .tag{ font-size:10.5px; color:var(--ink-55); line-height:1.3; max-width:220px; }
.rail.dark .rail-brand .tag{ color:var(--fcb-muted); }
.rail-x{ font-size:12px; font-weight:600; color:var(--ink-40); letter-spacing:.02em; }
.rail.dark .rail-x{ color:var(--fcb-muted); }
.rail-x b{ color:var(--teal); font-weight:700; }
.rail.dark .rail-x b{ color:var(--fcb-violet-soft); }

.rail-nav{ flex:1; padding:14px 10px; overflow-y:auto; display:flex; flex-direction:column; gap:2px; }
.rail-btn{ text-align:left; border:0; background:transparent; cursor:pointer; display:flex; align-items:center; gap:12px;
  padding:10px 12px; border-radius:10px; color:var(--ink-55); transition:background .18s ease, color .18s ease; }
.rail-btn:hover{ background:var(--ink-05); color:var(--ink); }
.rail.dark .rail-btn:hover{ background:rgba(234,243,236,.05); color:var(--fcb-text); }
.rail-btn .num{ width:28px; height:28px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-family:'JetBrains Mono',monospace; font-size:11px; font-weight:700; background:var(--ink-05); color:var(--ink-55);
  flex-shrink:0; border:1px solid transparent; transition:all .18s ease; }
.rail.dark .rail-btn .num{ background:rgba(234,243,236,.05); color:var(--fcb-muted); }
.rail-btn .body{ flex:1; min-width:0; }
.rail-btn .kicker{ font-family:'JetBrains Mono',monospace; font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-40); }
.rail.dark .rail-btn .kicker{ color:var(--fcb-muted); opacity:.7; }
.rail-btn .label{ font-weight:600; font-size:14px; letter-spacing:-.01em; margin-top:2px; line-height:1.25; }
.rail-btn.past{ color:var(--ink-70); }
.rail-btn.past .num{ background:transparent; border-color:var(--ink-10); color:var(--ink-70); }
.rail.dark .rail-btn.past{ color:rgba(234,243,236,.82); }
.rail.dark .rail-btn.past .num{ border-color:var(--fcb-line); color:var(--fcb-muted); }
.rail-btn.active{ background:var(--ink); color:var(--paper-2); }
.rail.dark .rail-btn.active{ background:rgba(62,158,104,.18); color:var(--fcb-text); border:1px solid rgba(62,158,104,.35); }
.rail-btn.active .num{ background:var(--amber); color:var(--ink); border-color:transparent; }
.rail.dark .rail-btn.active .num{ background:var(--fcb-violet); color:var(--fcb-text); }
.rail-btn.active .kicker{ color:rgba(255,255,255,.55); }
.rail.dark .rail-btn.active .kicker{ color:var(--fcb-muted); }
.rail-btn .pulse{ width:6px; height:6px; border-radius:50%; background:var(--amber-soft); animation:pulse 1.8s ease-in-out infinite; }
.rail.dark .rail-btn .pulse{ background:var(--fcb-violet-soft); }
@keyframes pulse{ 0%,100%{ opacity:1; transform:scale(1) } 50%{ opacity:.4; transform:scale(.6) } }

.rail-progress{ height:2px; background:var(--ink-05); border-radius:999px; margin:8px 14px 0; overflow:hidden; }
.rail.dark .rail-progress{ background:rgba(234,243,236,.05); }
.rail-progress .fill{ height:100%; background:var(--amber); transition:width .25s ease; }
.rail.dark .rail-progress .fill{ background:var(--fcb-violet); }

.rail-foot{ padding:14px 22px 18px; border-top:1px solid var(--line); display:flex; flex-direction:column; gap:10px; }
.rail.dark .rail-foot{ border-top-color:var(--fcb-line); }
.rail-foot .label{ font-family:'JetBrains Mono',monospace; font-size:10px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-40); font-weight:600; }
.rail.dark .rail-foot .label{ color:var(--fcb-muted); opacity:.7; }
.rail-foot .body{ font-size:11.5px; color:var(--ink-55); line-height:1.45; }
.rail.dark .rail-foot .body{ color:var(--fcb-muted); }

/* Mobile rail */
.mobile-rail{ display:none; position:fixed; top:0; left:0; right:0; z-index:50;
  background:var(--paper-2); border-bottom:1px solid var(--line); padding:12px 18px; align-items:center; gap:12px; }
.mobile-rail.dark{ background:var(--fcb-surface); border-bottom-color:var(--fcb-line); color:var(--fcb-text); }
.mobile-rail-img{ display:block; height:24px; width:auto; }
.mobile-rail.dark .mobile-rail-img{ filter:brightness(0) invert(1) opacity(.92); }
@media (max-width: 900px){ .mobile-rail{ display:flex } .rail{ display:none } }
.mobile-rail .crumbs{ flex:1; display:flex; align-items:center; gap:6px; font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.1em; }
.mobile-rail .crumbs .dot{ width:8px; height:8px; border-radius:50%; background:var(--ink-10); }
.mobile-rail .crumbs .dot.done{ background:var(--ink-25); }
.mobile-rail .crumbs .dot.active{ background:var(--amber); width:16px; border-radius:999px; }
.mobile-rail.dark .crumbs .dot{ background:rgba(234,243,236,.10); }
.mobile-rail.dark .crumbs .dot.done{ background:rgba(234,243,236,.25); }
.mobile-rail.dark .crumbs .dot.active{ background:var(--fcb-violet); }

/* ---- Chapter shell ---- */
.chapter{ padding:64px var(--shell-pad-x) 96px; max-width:1280px; margin:0 auto; }
.chapter-num{ font-family:'JetBrains Mono',monospace; font-size:11px; letter-spacing:.18em; color:var(--ink-40); font-weight:600; margin-bottom:28px; }
.chapter.dark .chapter-num{ color:var(--fcb-muted); opacity:.7; }
.chapter-foot{ margin-top:72px; padding-top:28px; border-top:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap; }
.chapter.dark .chapter-foot{ border-top-color:var(--fcb-line); }
.next-btn{ display:inline-flex; align-items:center; gap:10px; padding:14px 22px; border-radius:999px; border:0; cursor:pointer;
  background:var(--ink); color:var(--paper-2); font:600 14px/1 'Inter',sans-serif; letter-spacing:-.005em;
  box-shadow:0 2px 0 rgba(0,0,0,.15), 0 14px 30px rgba(15,20,25,.18); transition:transform .15s ease, box-shadow .2s ease; }
.next-btn:hover{ transform:translateY(-1px); box-shadow:0 2px 0 rgba(0,0,0,.15), 0 18px 36px rgba(15,20,25,.24); }
.next-btn.teal{ background:var(--teal); }
.next-btn.fcb{ background:var(--fcb-violet); color:#06160F; box-shadow:0 2px 0 rgba(0,0,0,.25), 0 14px 36px rgba(62,158,104,.45); }
.next-btn .arrow{ display:inline-flex }
.foot-meta{ font-family:'JetBrains Mono',monospace; font-size:11px; letter-spacing:.12em; color:var(--ink-40); text-transform:uppercase; }
.chapter.dark .foot-meta{ color:var(--fcb-muted); opacity:.7; }

/* Chips */
.chip{ display:inline-flex; align-items:center; gap:6px; padding:5px 11px; border-radius:999px;
  font-size:11.5px; font-weight:600; line-height:1; letter-spacing:-.005em; border:1px solid currentColor; }
.chip .dot{ width:5px; height:5px; border-radius:50%; background:currentColor; }
.chip.teal{ color:var(--teal); background:var(--teal-tint); border-color:transparent; }
.chip.amber{ color:#8a6300; background:var(--amber-tint); border-color:transparent; }
.chip.sky{ color:var(--sky); background:var(--sky-tint); border-color:transparent; }
.chip.live{ color:var(--grass); background:var(--paper-2); border-color:var(--grass); }
.chip.live .dot{ background:var(--grass); animation:pulse 1.4s ease-in-out infinite; }

/* Headings shared */
.h2{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.035em; font-size:clamp(34px,4.6vw,58px); line-height:1.04; margin:0; color:var(--ink-90); }
.chapter.dark .h2{ color:var(--fcb-text); }
.h2 .it{ font-family:'Newsreader',serif; font-style:italic; font-weight:400; color:var(--teal); letter-spacing:-.02em; }
.chapter.dark .h2 .it{ color:var(--fcb-violet-soft); }
.intro{ margin-top:24px; font-size:17px; color:var(--ink-70); line-height:1.6; max-width:660px; text-wrap:pretty; }
.chapter.dark .intro{ color:var(--fcb-muted); }

/* === Chapter 1 — hero === */
.ch1-grid{ display:grid; grid-template-columns:1.25fr 1fr; gap:56px; align-items:center; margin-top:8px; }
@media (max-width:1100px){ .ch1-grid{ grid-template-columns:1fr; gap:32px } }
.ch1-h1{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.045em; font-size:clamp(38px,5.2vw,82px);
  line-height:1.03; margin:0; color:var(--ink); overflow-wrap:break-word; text-wrap:balance; }
.ch1-h1 .it{ font-family:'Newsreader',serif; font-style:italic; font-weight:400; color:var(--teal); letter-spacing:-.02em; }
.ch1-sub{ margin-top:36px; font-size:19px; line-height:1.55; color:var(--ink-70); max-width:560px; text-wrap:pretty; }
.ch1-media{ border-radius:20px; overflow:hidden; border:1px solid var(--line); position:relative;
  box-shadow:0 1px 2px rgba(0,0,0,.03), 0 26px 60px -24px rgba(20,52,42,.35); }
.ch1-media img{ display:block; width:100%; height:100%; object-fit:cover; aspect-ratio:4/3; }
.ch1-media .cap{ position:absolute; left:0; right:0; bottom:0; padding:14px 16px;
  background:linear-gradient(0deg, rgba(8,20,14,.72), rgba(8,20,14,0)); color:#fff;
  font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.12em; text-transform:uppercase; }
.ch1-strip{ margin-top:52px; padding-top:26px; border-top:1px solid var(--line);
  display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
@media (max-width:800px){ .ch1-strip{ grid-template-columns:repeat(2,1fr); gap:16px } }
.ch1-strip .pair{ display:flex; flex-direction:column; gap:6px; }
.ch1-strip .pair .k{ font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-40); font-weight:600 }
.ch1-strip .pair .v{ font-weight:700; font-size:16px; letter-spacing:-.015em; color:var(--ink); }
.ch1-strip .pair .v.serif{ font-family:'Newsreader',serif; font-style:italic; font-weight:500; color:var(--teal); }

/* === Big count-up stats (Ch2) === */
.bigstats{ display:flex; gap:48px; flex-wrap:wrap; margin:8px 0 4px; }
.bigstats .s .n{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.04em; font-size:clamp(40px,6vw,76px); line-height:.92; color:var(--teal); }
.bigstats .s .n small{ font-size:.32em; color:var(--ink-55); font-weight:700; letter-spacing:0; margin-left:4px; }
.bigstats .s.amber .n{ color:var(--amber); }
.bigstats .s.coral .n{ color:var(--coral); }
.bigstats .s .l{ font-size:14px; color:var(--ink-55); margin-top:10px; max-width:24ch; line-height:1.4; }

/* === Cards (generic) === */
.cards{ display:grid; gap:16px; }
.cards.c2{ grid-template-columns:repeat(2,1fr) } .cards.c3{ grid-template-columns:repeat(3,1fr) } .cards.c4{ grid-template-columns:repeat(4,1fr) }
@media (max-width:980px){ .cards.c4{ grid-template-columns:repeat(2,1fr) } }
@media (max-width:700px){ .cards.c2,.cards.c3,.cards.c4{ grid-template-columns:1fr } }
.card2{ background:var(--paper-2); border:1px solid var(--line); border-radius:16px; padding:20px 22px; }
.card2 .k{ font-family:'JetBrains Mono',monospace; font-size:10.5px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--teal); display:flex; gap:7px; align-items:center; }
.card2 h4{ margin:9px 0 6px; font-size:17px; color:var(--ink-90); letter-spacing:-.015em; }
.card2 p{ margin:0; font-size:13.5px; color:var(--ink-70); line-height:1.5; }
.card2 .ico{ color:var(--teal); display:inline-flex; }

/* === Editorial list (Ch3) === */
.list{ margin:0; padding:0; list-style:none; display:grid; gap:14px; max-width:60ch; }
.list li{ display:flex; gap:14px; align-items:flex-start; font-size:16px; color:var(--ink-90); line-height:1.45; }
.list li .i{ flex:none; width:28px; height:28px; border-radius:50%; background:var(--teal-tint); color:var(--teal-deep);
  font-size:13px; font-weight:800; display:grid; place-items:center; border:1px solid #cfe3d6; margin-top:1px; }
.list li b{ color:var(--ink); }
.chapter.dark .list li{ color:var(--fcb-text); }
.chapter.dark .list li .i{ background:rgba(62,158,104,.16); color:var(--fcb-violet-soft); border-color:transparent; }

/* split (text | media) */
.split{ display:grid; grid-template-columns:1.15fr .85fr; gap:52px; align-items:center; margin-top:8px; }
@media (max-width:980px){ .split{ grid-template-columns:1fr; gap:30px } }
.wa-shot{ width:100%; max-width:320px; height:auto; border-radius:20px; display:block; margin:0 auto;
  box-shadow:0 26px 55px -22px rgba(20,52,42,.5); }

/* === notebar === */
.notebar{ margin-top:26px; font-size:15px; color:var(--teal-deep); background:var(--teal-tint); border:1px solid #cfe3d6; border-radius:12px; padding:14px 18px; line-height:1.5; }
.notebar b{ font-weight:700 }
.notebar.coral{ color:#9c2c54; background:var(--coral-tint); border-color:#f3c2d4; }
.chapter.dark .notebar{ color:var(--fcb-text); background:rgba(62,158,104,.10); border-color:var(--fcb-line-strong); }

/* === Dark chapter helpers === */
.blob{ position:absolute; border-radius:50%; pointer-events:none; }
.dk-card{ background:rgba(234,243,236,.025); border:1px solid var(--fcb-line); border-radius:16px; padding:22px 24px; }
.dk-card .k{ font-family:'JetBrains Mono',monospace; font-size:10.5px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--fcb-violet-soft); }
.dk-card h4{ margin:9px 0 6px; font-size:17px; color:var(--fcb-text); letter-spacing:-.015em; }
.dk-card p{ margin:0; font-size:13.5px; color:var(--fcb-muted); line-height:1.5; }
.dk-card.step1{ background:rgba(62,158,104,.10); border-color:rgba(62,158,104,.30); }
.dk-card.step2{ background:rgba(61,127,176,.10); border-color:rgba(61,127,176,.30); }
.dk-card.step2 .k{ color:var(--fcb-blue); }
.section-label{ font-family:'JetBrains Mono',monospace; font-size:11px; letter-spacing:.18em; text-transform:uppercase; font-weight:600; color:var(--teal); margin:0 0 14px; }
.close-line{ font-family:'Newsreader',serif; font-style:italic; font-weight:500; font-size:clamp(20px,2.4vw,30px); line-height:1.3; color:var(--ink-90); margin-top:34px; max-width:32ch; }
.close-line b{ font-style:normal; font-weight:700; color:var(--teal); }

/* ============ WhatsApp interactive demo (Ch 4) ============ */
.demo-stage{ display:grid; grid-template-columns:340px 1fr; gap:28px; align-items:start;
  margin-top:18px; padding:24px; background:var(--paper-2); border:1px solid var(--line); border-radius:20px; }
@media (max-width:860px){ .demo-stage{ grid-template-columns:1fr; gap:22px } }
.phone{ width:330px; max-width:100%; margin:0 auto; background:#0b0f0d; border-radius:38px; padding:10px; box-shadow:0 24px 50px -20px rgba(20,52,42,.45); }
.screen{ background:var(--wa-bg); border-radius:30px; overflow:hidden; height:560px; display:flex; flex-direction:column; }
.wa-head{ background:var(--wa-head); color:#fff; display:flex; align-items:center; gap:10px; padding:14px 14px 12px; }
.wa-head .av{ width:34px; height:34px; border-radius:50%; background:var(--wa-accent); display:grid; place-items:center; font-weight:800; color:#073; font-size:14px; }
.wa-head .nm{ font-weight:600; font-size:14px; line-height:1.1 }
.wa-head .st{ font-size:11px; opacity:.82 }
.wa-head .chev{ opacity:.8; margin-left:auto; font-size:18px }
.chat{ flex:1; overflow-y:auto; padding:14px 12px 16px; display:flex; flex-direction:column;
  background-image:radial-gradient(rgba(0,0,0,.03) 1px,transparent 1px); background-size:18px 18px; }
.day{ align-self:center; background:#fff; color:#5a6b62; font-size:11px; font-weight:600; padding:4px 11px; border-radius:8px; margin:2px auto 12px; box-shadow:0 1px 1px rgba(0,0,0,.06); }
.msg{ max-width:84%; margin:3px 0; padding:7px 10px 6px; border-radius:10px; font-size:13.5px; position:relative; animation:pop .22s ease; box-shadow:0 1px .5px rgba(0,0,0,.13); white-space:pre-wrap; word-wrap:break-word; }
.msg.bot{ background:var(--wa-in); align-self:flex-start; border-top-left-radius:3px; }
.msg.user{ background:var(--wa-out); align-self:flex-end; border-top-right-radius:3px; }
.msg .t{ font-size:10px; color:#8a948e; float:right; margin:6px 0 -2px 8px; }
.msg.user .t{ color:#5a7a52 }
.msg .tick{ color:#34b7f1; font-weight:700 }
@keyframes pop{ from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:none} }
.doc{ display:flex; align-items:center; gap:9px; background:#f3efe6; border-radius:8px; padding:9px 10px; margin-top:2px; }
.doc .ic{ width:30px; height:34px; border-radius:5px; background:#fff; border:1px solid #e0d9c8; display:grid; place-items:center; font-size:14px; }
.doc .fn{ font-size:12.5px; font-weight:600 } .doc .fm{ font-size:11px; color:#8a948e }
.reply{ display:flex; flex-direction:column; gap:1px; align-self:flex-start; width:84%; margin:2px 0 6px; }
.reply b{ background:#fff; color:var(--wa-head); text-align:center; font-size:13px; font-weight:600; padding:9px; border-radius:8px; box-shadow:0 1px .5px rgba(0,0,0,.13); }
.typing{ align-self:flex-start; background:#fff; border-radius:10px; border-top-left-radius:3px; padding:10px 12px; margin:3px 0; box-shadow:0 1px .5px rgba(0,0,0,.13); }
.typing span{ display:inline-block; width:7px; height:7px; border-radius:50%; background:#b9c2bb; margin:0 2px; animation:blink 1.2s infinite; }
.typing span:nth-child(2){ animation-delay:.2s } .typing span:nth-child(3){ animation-delay:.4s }
@keyframes blink{ 0%,60%,100%{opacity:.3} 30%{opacity:1} }
.wa-input{ background:#f0f0f0; display:flex; align-items:center; gap:8px; padding:8px 10px; }
.wa-input .box{ flex:1; background:#fff; border-radius:18px; padding:8px 12px; color:#9aa39d; font-size:12.5px; }
.wa-input .snd{ width:34px; height:34px; border-radius:50%; background:var(--wa-accent); display:grid; place-items:center; color:#fff; font-size:15px; }

.panel h3{ font-size:13px; letter-spacing:.04em; text-transform:uppercase; color:var(--ink-55); margin:2px 0 4px; }
.scen-title{ font-size:19px; font-weight:800; letter-spacing:-.02em; color:var(--teal-deep); margin:0 0 2px; }
.scen-tag{ display:inline-flex; align-items:center; gap:6px; font-size:12px; font-weight:700; padding:3px 9px; border-radius:999px; margin-bottom:14px; }
.scen-tag.e1{ background:var(--teal-tint); color:var(--teal-deep); } .scen-tag.e2{ background:var(--sky-tint); color:var(--sky); }
.steps{ list-style:none; margin:0; padding:0; counter-reset:s; }
.steps li{ position:relative; padding:9px 12px 9px 44px; border-radius:10px; color:#7d867f; font-size:13.5px; border:1px solid transparent; transition:.2s; margin-bottom:2px; }
.steps li::before{ counter-increment:s; content:counter(s); position:absolute; left:10px; top:8px; width:22px; height:22px; border-radius:50%; background:#eef0ec; color:#9aa39d; font-size:12px; font-weight:700; display:grid; place-items:center; transition:.2s; }
.steps li.done{ color:#5a6b62 } .steps li.done::before{ background:#cfe3d6; color:var(--teal-deep); content:"✓" }
.steps li.active{ background:var(--teal-tint); border-color:#cfe3d6; color:var(--teal-deep); font-weight:600 }
.steps li.active::before{ background:var(--teal); color:#fff }
.steps li .db{ display:inline-block; font-size:10.5px; font-weight:700; color:var(--sky); background:var(--sky-tint); padding:1px 6px; border-radius:5px; margin-left:6px; vertical-align:1px; }
.steps li .db.os{ color:#1E7B45; background:#E4F2E9 } .steps li .db.mail{ color:#9A5B00; background:#FBEFD8 }
.legend{ margin:10px 2px 0; font-size:11.5px; color:var(--ink-55); line-height:1.7 } .legend b{ font-weight:700 }
.handoff{ margin-top:16px; border:1px dashed var(--sky); background:var(--sky-tint); border-radius:12px; padding:14px;
  opacity:0; transform:translateY(8px); transition:.35s; } .handoff.show{ opacity:1; transform:none }
.handoff .hh{ font-size:11px; font-weight:800; letter-spacing:.06em; text-transform:uppercase; color:var(--sky); margin-bottom:6px; }
.handoff dl{ margin:0; display:grid; grid-template-columns:auto 1fr; gap:3px 12px; font-size:13px; }
.handoff dt{ color:var(--ink-55) } .handoff dd{ margin:0; font-weight:600; color:var(--teal-deep) }
.handoff .act{ margin-top:10px; font-size:12.5px; background:#fff; border-radius:8px; padding:8px 10px; color:var(--sky); font-weight:600; }
.tabs{ display:flex; flex-wrap:wrap; gap:8px; margin:0 0 16px; }
.tab{ appearance:none; cursor:pointer; border:1px solid var(--line); background:var(--paper-2); border-radius:999px; padding:8px 14px; font:inherit; font-size:13px; font-weight:600; color:#445; display:flex; align-items:center; gap:8px; transition:.15s; }
.tab:hover{ border-color:#bcd4c4 }
.tab[aria-selected="true"]{ background:var(--teal-deep); border-color:var(--teal-deep); color:#fff; }
.tab .stp{ font-size:11px; font-weight:700; padding:2px 7px; border-radius:6px; background:var(--teal-tint); color:var(--teal-deep); }
.tab[aria-selected="true"] .stp{ background:rgba(255,255,255,.18); color:#dff0e6; }
.ctrls{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; border-top:1px solid var(--line); margin-top:16px; padding-top:16px; }
.btn{ appearance:none; font:inherit; cursor:pointer; border-radius:10px; border:1px solid var(--line); background:var(--paper-2); padding:9px 15px; font-weight:600; font-size:13.5px; color:#334; display:inline-flex; align-items:center; gap:8px; transition:.15s; }
.btn:hover{ border-color:#bcd4c4 } .btn.primary{ background:var(--teal); border-color:var(--teal); color:#fff } .btn.primary:hover{ background:var(--teal-deep) }
.btn[disabled]{ opacity:.4; cursor:not-allowed }
.progress{ font-size:13px; color:var(--ink-55); margin-left:auto } .progress b{ color:var(--teal-deep) }
.demo-hint{ font-size:12px; color:var(--ink-55); flex-basis:100%; margin-top:-2px }

/* scenario selector cards (problem recap → demo executes it) */
.demo-cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin:24px 0 0; }
@media(max-width:860px){ .demo-cards{ grid-template-columns:1fr } }
.demo-card{ appearance:none; text-align:left; cursor:pointer; font:inherit; background:var(--paper-2);
  border:1px solid var(--line); border-radius:16px; padding:16px 18px; transition:transform .16s ease, border-color .16s ease, background .16s ease; }
.demo-card:hover{ border-color:#bcd4c4; transform:translateY(-1px); }
.demo-card.on{ background:var(--teal-deep); border-color:var(--teal-deep); box-shadow:0 16px 40px -22px rgba(20,52,42,.5); }
.dc-top{ display:flex; align-items:center; justify-content:space-between; gap:10px; }
.dc-title{ font-weight:700; font-size:15px; letter-spacing:-.01em; color:var(--ink); }
.demo-card.on .dc-title{ color:#fff; }
.dc-chip{ flex:none; font-size:11px; font-weight:700; padding:3px 8px; border-radius:7px; background:var(--teal-tint); color:var(--teal-deep); }
.demo-card.on .dc-chip{ background:rgba(255,255,255,.18); color:#dff0e6; }
.dc-pblabel{ font-family:'JetBrains Mono',monospace; font-size:9px; letter-spacing:.12em; text-transform:uppercase; color:var(--coral); font-weight:700; margin-top:11px; }
.demo-card.on .dc-pblabel{ color:#f3b9cd; }
.dc-pb{ margin-top:5px; font-size:12.5px; line-height:1.5; color:var(--ink-55); }
.demo-card.on .dc-pb{ color:rgba(255,255,255,.85); }
.demo-bridge{ margin:16px 0 0; text-align:center; font-family:'JetBrains Mono',monospace; font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--teal); font-weight:600; }

/* ============ Chapter 3 — opportunité extras ============ */
.wa-hero{ display:flex; align-items:center; justify-content:center; padding:8px; }
.wa-logo{ width:min(76%,260px); height:auto; filter:drop-shadow(0 26px 55px rgba(11,140,106,.45)); }

.opp-stats{ margin-top:52px; display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
@media(max-width:760px){ .opp-stats{ grid-template-columns:1fr } }
.opp-stat{ background:var(--paper-2); border:1px solid var(--line); border-radius:16px; padding:20px 22px; }
.opp-stat .n{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.04em; font-size:clamp(34px,4.2vw,48px); line-height:1; color:var(--teal); }
.opp-stat .l{ margin-top:10px; font-size:14px; color:var(--ink-90); line-height:1.45; font-weight:600; }
.opp-stat .l span{ display:block; margin-top:4px; font-weight:500; font-size:12px; color:var(--ink-55); }
.src{ margin-top:12px; font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.03em; color:var(--ink-40); }

/* integration architecture */
.arch{ margin-top:18px; display:flex; align-items:stretch; gap:12px; }
@media(max-width:900px){ .arch{ flex-direction:column; align-items:stretch } }
.arch-col{ flex:1; background:var(--paper-2); border:1px solid var(--line); border-radius:16px; padding:16px 16px 14px; }
.arch-col.mid{ background:linear-gradient(180deg,#fff,var(--teal-tint)); border-color:#cfe3d6; box-shadow:0 16px 42px -24px rgba(47,125,84,.45); }
.arch-col .hd{ font-family:'JetBrains Mono',monospace; font-size:10px; letter-spacing:.12em; text-transform:uppercase; color:var(--ink-40); font-weight:600; margin-bottom:12px; }
.arch-col.mid .hd{ color:var(--teal-deep); }
.arch-node{ background:var(--paper); border:1px solid var(--line); border-radius:9px; padding:8px 11px; font-size:12.5px; font-weight:600; color:var(--ink-90); margin-bottom:7px; }
.arch-node:last-child{ margin-bottom:0; }
.arch-col.mid .arch-node{ background:#fff; border-color:#cfe3d6; }
.arch-node small{ display:block; font-weight:500; font-size:11px; color:var(--ink-55); margin-top:1px; }
.arch-arrow{ align-self:center; color:var(--teal); flex:none; font-size:22px; font-weight:700; }
@media(max-width:900px){ .arch-arrow{ transform:rotate(90deg); align-self:center } }
.arch-note{ margin-top:16px; font-size:13.5px; color:var(--ink-70); line-height:1.6; max-width:760px; }
.arch-note b{ color:var(--teal-deep); }

/* Chapter 5 — impact before/after */
.impact-ba{ display:grid; grid-template-columns:1fr auto 1fr; gap:18px; align-items:stretch; margin-top:32px; }
@media(max-width:760px){ .impact-ba{ grid-template-columns:1fr } .impact-ba .ba-arrow{ transform:rotate(90deg) } }
.ba-card{ border-radius:18px; padding:26px 28px; border:1px solid var(--line); }
.ba-card.before{ background:var(--paper-2); }
.ba-card.after{ background:linear-gradient(135deg,var(--teal-deep),var(--teal)); color:#fff; border-color:transparent; box-shadow:0 22px 50px -24px rgba(20,52,42,.55); }
.ba-k{ font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.14em; text-transform:uppercase; font-weight:700; }
.ba-card.before .ba-k{ color:var(--coral); }
.ba-card.after .ba-k{ color:#cfeede; }
.ba-n{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.04em; font-size:clamp(42px,5.6vw,68px); line-height:1; margin-top:10px; }
.ba-card.before .ba-n{ color:var(--ink); }
.ba-card.after .ba-n{ color:#fff; }
.ba-l{ margin-top:10px; font-size:14px; line-height:1.45; }
.ba-card.before .ba-l{ color:var(--ink-70); }
.ba-card.after .ba-l{ color:rgba(255,255,255,.92); }
.ba-arrow{ align-self:center; color:var(--teal); font-size:30px; font-weight:700; }

/* Chapter 6 — ROI panel + pricing */
.roi{ margin-top:30px; border-radius:20px; padding:26px 30px; color:#fff;
  background:linear-gradient(135deg,var(--teal-deep),var(--teal)); box-shadow:0 24px 54px -26px rgba(20,52,42,.6); position:relative; overflow:hidden; }
.roi::before{ content:""; position:absolute; right:-90px; top:-90px; width:320px; height:320px; border-radius:50%;
  background:radial-gradient(circle, rgba(221,169,75,.4), rgba(221,169,75,0) 70%); }
.roi .big{ position:relative; font-weight:600; letter-spacing:-.015em; font-size:clamp(17px,1.9vw,21px); line-height:1.45; max-width:62ch; }
.roi .big b{ color:#fff; font-weight:800; }
.roi .figs{ position:relative; margin-top:20px; display:flex; gap:14px; flex-wrap:wrap; }
.roi .fig{ flex:1 1 190px; background:rgba(255,255,255,.10); border:1px solid rgba(255,255,255,.18); border-radius:12px; padding:14px 16px; }
.roi .fig .n{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.02em; font-size:21px; color:var(--amber-soft); line-height:1.1; }
.roi .fig .l{ font-family:'JetBrains Mono',monospace; font-size:10px; letter-spacing:.07em; text-transform:uppercase; color:rgba(255,255,255,.85); margin-top:7px; line-height:1.45; }
.roi .fig .l .fn{ display:block; margin-top:5px; font-family:'Newsreader',serif; font-style:italic; font-size:11.5px; letter-spacing:0; text-transform:none; color:rgba(255,255,255,.7); }

.h2-price{ display:block; margin-top:12px; font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.025em; font-size:.5em; color:var(--teal-deep); }

.pricing{ display:grid; grid-template-columns:repeat(2,1fr); gap:16px; margin-top:18px; align-items:stretch; max-width:880px; }
@media(max-width:860px){ .pricing{ grid-template-columns:1fr } }
.price-card{ background:var(--paper-2); border:1px solid var(--line); border-radius:18px; padding:22px 24px; display:flex; flex-direction:column; position:relative; }
.price-card.feat{ background:linear-gradient(180deg,#fff,var(--teal-tint)); border-color:#cfe3d6; box-shadow:0 18px 44px -24px rgba(47,125,84,.45); }
.price-tag{ position:absolute; top:-10px; left:24px; font-size:10px; font-weight:800; letter-spacing:.06em; text-transform:uppercase; padding:4px 10px; border-radius:999px; background:var(--teal); color:#fff; }
.price-k{ font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.12em; text-transform:uppercase; font-weight:700; color:var(--ink-40); }
.price-card.feat .price-k{ color:var(--teal-deep); }
.price-amt{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.03em; font-size:clamp(30px,3.6vw,40px); line-height:1; margin:11px 0 3px; color:var(--ink); }
.price-amt small{ font-size:.4em; font-weight:700; color:var(--ink-55); letter-spacing:0; }
.price-sub{ font-family:'JetBrains Mono',monospace; font-size:11px; letter-spacing:.02em; color:var(--ink-55); }
.price-desc{ margin-top:14px; font-size:13px; color:var(--ink-70); line-height:1.5; }
.price-note{ margin-top:14px; font-size:12.5px; color:var(--ink-55); line-height:1.5; }
.price-note b{ color:var(--teal-deep); font-weight:700; }
.nextstep{ margin-top:14px; font-size:16px; color:var(--ink-90); line-height:1.55; max-width:62ch; }
.nextstep b{ color:var(--teal-deep); }

/* project scope table */
.proj-lead{ margin:14px 0 2px; font-size:15px; color:var(--ink-70); line-height:1.5; }
.proj-lead b{ color:var(--teal-deep); }
.proc-table{ margin-top:14px; border:1px solid var(--line); border-radius:16px; overflow:hidden; background:var(--paper-2); }
.pt-head, .pt-row{ display:grid; grid-template-columns:1.4fr 2.3fr 1fr; gap:18px; align-items:center; padding:14px 20px; }
.pt-head{ background:var(--paper); font-family:'JetBrains Mono',monospace; font-size:10px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-40); font-weight:700; }
.pt-row{ border-top:1px solid var(--line); }
.pt-name{ font-weight:700; font-size:15px; color:var(--ink); letter-spacing:-.01em; }
.pt-exec{ font-size:13px; color:var(--ink-70); line-height:1.45; }
.pt-data{ font-size:11.5px; color:var(--ink-55); font-family:'JetBrains Mono',monospace; letter-spacing:.02em; justify-self:start; }
.pt-row.opt{ background:rgba(194,138,42,.05); }
.pt-opt{ display:inline-block; margin-left:8px; font-family:'JetBrains Mono',monospace; font-size:10px; font-weight:700; letter-spacing:.04em; text-transform:uppercase; color:#8a6300; background:var(--amber-tint); padding:2px 8px; border-radius:999px; vertical-align:middle; }
@media(max-width:760px){
  .pt-head{ display:none; }
  .pt-row{ grid-template-columns:1fr; gap:5px; padding:14px 16px; }
}

/* ============ GATE ============ */
.gate{ min-height:100vh; display:flex; align-items:center; justify-content:center; padding:40px 24px; position:relative; overflow:hidden; background:var(--paper); }
.gate-arc{ position:absolute; inset:0; width:100%; height:100%; pointer-events:none; opacity:.9; }
.gate-shell{ width:100%; max-width:560px; position:relative; z-index:1; }
.gate-rail-top{ display:flex; align-items:center; justify-content:space-between; margin-bottom:26px; }
.gate-brand-img{ display:block; height:34px; width:auto; }
.gate-tag{ font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-40); font-weight:600; }
.gate-card{ background:var(--paper-2); border:1px solid var(--line); border-radius:22px; padding:40px 38px;
  box-shadow:0 1px 2px rgba(0,0,0,.03), 0 30px 70px -30px rgba(20,52,42,.30); }
.gate-kicker{ font-family:'JetBrains Mono',monospace; font-size:11px; letter-spacing:.18em; text-transform:uppercase; color:var(--teal); font-weight:600; }
.gate-h1{ font-family:'Inter',sans-serif; font-weight:800; letter-spacing:-.035em; font-size:clamp(28px,4vw,42px); line-height:1.08; margin:14px 0 0; color:var(--ink); }
.gate-h1 .it{ font-family:'Newsreader',serif; font-style:italic; font-weight:400; color:var(--teal); }
.gate-sub{ margin-top:18px; font-size:14.5px; color:var(--ink-70); line-height:1.6; }
.gate-form{ margin-top:24px; display:flex; gap:10px; flex-wrap:wrap; }
.gate-form input{ flex:1; min-width:200px; padding:14px 16px; border:1px solid var(--line); border-radius:12px; font:inherit; font-size:15px; color:var(--ink); background:var(--paper); outline:none; transition:.15s; }
.gate-form input:focus{ border-color:var(--teal); box-shadow:0 0 0 3px rgba(47,125,84,.15); }
.gate-form button{ display:inline-flex; align-items:center; gap:9px; padding:14px 22px; border-radius:12px; border:0; cursor:pointer;
  background:var(--teal); color:#fff; font:700 14.5px 'Inter',sans-serif; box-shadow:0 2px 0 rgba(0,0,0,.1), 0 12px 28px rgba(47,125,84,.28); transition:.15s; }
.gate-form button:hover{ transform:translateY(-1px) } .gate-form button:disabled{ opacity:.6; cursor:default; transform:none; }
.gate-err{ margin-top:10px; font-size:13px; color:var(--coral); font-weight:600; }
.gate-meta{ margin-top:22px; padding-top:18px; border-top:1px solid var(--line); display:flex; gap:18px; flex-wrap:wrap;
  font-family:'JetBrains Mono',monospace; font-size:10.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--ink-40); font-weight:600; }
.gate-meta span{ display:inline-flex; align-items:center; gap:6px; } .gate-meta .dot{ width:6px; height:6px; border-radius:50%; background:var(--grass); }