/* cPlatform product page (/platform/).
   Builds on the brand tokens and section primitives of landing.css
   (.codei-page, .codei-kicker, .codei-h2, .codei-lead, .codei-form*). Own
   layout only — no NovaDark components in the page body. Everything is visible
   without JS; motion is limited to hover/focus transitions and is switched off
   under prefers-reduced-motion. */

.plat{
  --rule:rgba(255,255,255,.1);
  --rule-strong:rgba(255,255,255,.18);
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --serif:'Playfair Display',Georgia,'Times New Roman',serif;
  overflow-x:clip;
}
/* Reset inside :where() so it adds no specificity: every .plat-* rule below
   (single class, later in the file) still sets its own margins and padding. */
.plat :where(h1,h2,h3,p,ol,ul,dl,dd,figure){margin:0;padding:0}
.plat :where(ol,ul){list-style:none}

.plat-wrap{max-width:1200px;margin:0 auto;padding-inline:clamp(20px,5vw,64px)}
.plat-section{padding-block:clamp(72px,9vw,112px)}
.plat-section--alt{background:linear-gradient(180deg,#0a0d14,var(--bg-0))}
.plat .codei-h2{margin-bottom:18px}
.plat .codei-kicker{letter-spacing:.28em;margin-bottom:14px}
@media (max-width:640px){.plat .codei-kicker{letter-spacing:.16em;font-size:11.5px}}

/* Focus is always visible: the crimson brand colour alone is too dark on the
   page ground, so the ring is light with a dark gap. */
.plat a:focus-visible,.plat button:focus-visible{
  outline:2px solid #fff;outline-offset:3px;border-radius:6px}

/* ── Buttons ──────────────────────────────────────────────────── */
.plat-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;
  padding:12px 26px;border-radius:999px;font-weight:600;font-size:15px;line-height:1.2;
  text-decoration:none;cursor:pointer;border:1px solid transparent;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease}
.plat-btn--primary{background:var(--crimson);color:#fff}
.plat-btn--primary:hover{background:#e2483d;box-shadow:0 14px 40px -14px var(--crimson)}
.plat-btn--ghost{background:transparent;color:var(--ink);border-color:var(--rule-strong)}
.plat-btn--ghost:hover{border-color:var(--ink);background:rgba(255,255,255,.04)}

/* ── 1. Hero ──────────────────────────────────────────────────── */
.plat-hero{position:relative;padding-block:clamp(56px,8vw,104px) clamp(64px,8vw,104px);
  border-bottom:1px solid var(--rule);
  background:
    radial-gradient(900px 420px at 88% 0%,rgba(216,58,46,.10),transparent 70%),
    var(--bg-0)}
.plat-hero__grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:clamp(36px,5vw,72px);align-items:center}
.plat-h1{font-family:var(--serif);font-weight:700;font-size:clamp(34px,4.6vw,58px);line-height:1.06;
  letter-spacing:-.01em;text-wrap:balance;margin-bottom:22px}
.plat-h1 em{display:block;font-style:normal;color:var(--web);margin-top:.18em;
  font-size:.62em;line-height:1.2;letter-spacing:0}
.plat-lead{color:var(--ink-dim);font-size:clamp(16px,1.35vw,18px);line-height:1.65;max-width:58ch}
.plat-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* Cross-section of the stack. The twin vertical lines with ties on the left
   are the "rails" every layer sits on. */
.plat-stack{position:relative;padding-left:34px}
.plat-stack::before{content:"";position:absolute;left:6px;top:10px;bottom:44px;width:16px;
  border-inline:2px solid var(--rule-strong);
  background:repeating-linear-gradient(180deg,transparent 0 12px,var(--rule-strong) 12px 14px)}
.plat-stack__layers{display:flex;flex-direction:column;gap:10px}
.plat-layer{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr);
  column-gap:16px;row-gap:4px;align-items:baseline;
  padding:16px 20px 16px 18px;border:1px solid var(--rule);border-left:3px solid var(--accent);
  border-radius:4px 12px 12px 4px;background:linear-gradient(90deg,var(--bg-2),var(--bg-1))}
.plat-layer--ds{--accent:var(--web)}
.plat-layer--fe{--accent:var(--audit)}
.plat-layer--be{--accent:var(--ai)}
.plat-layer--cd{--accent:var(--infra)}
.plat-layer--obs{--accent:#cbd5e1}
.plat-layer__id{grid-row:span 2;align-self:center;font-family:var(--mono);font-size:12px;
  color:var(--accent);letter-spacing:.06em;min-width:24px}
.plat-layer__name{font-weight:600;font-size:16px;color:var(--ink)}
.plat-layer__desc{grid-column:2;font-family:var(--mono);font-size:12px;line-height:1.5;color:var(--ink-dim)}
.plat-stack__cap{margin-top:16px;font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--ink-dim)}

/* ── 2. Spec sheet ────────────────────────────────────────────── */
.plat-spec{margin-top:clamp(36px,5vw,56px);border-top:1px solid var(--rule-strong)}
.plat-spec__group{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);
  gap:clamp(20px,4vw,56px);padding-block:clamp(26px,3.4vw,40px);border-bottom:1px solid var(--rule-strong)}
.plat-spec__group--fe{--accent:var(--web)}
.plat-spec__group--be{--accent:var(--ai)}
.plat-spec__group--qa{--accent:var(--audit)}
.plat-spec__group--cd{--accent:var(--infra)}
.plat-spec__group--obs{--accent:#cbd5e1}
.plat-spec__id{display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.08em;
  color:var(--accent);margin-bottom:10px}
.plat-h3{font-family:var(--serif);font-weight:700;font-size:clamp(21px,2vw,26px);line-height:1.2;color:var(--ink)}
.plat-row{display:grid;grid-template-columns:minmax(0,190px) minmax(0,1fr);gap:8px 24px;
  padding-block:13px;border-top:1px solid var(--rule)}
.plat-row:first-child{border-top:0;padding-top:4px}
.plat-row dt{font-family:var(--mono);font-size:12.5px;line-height:1.7;color:var(--ink);
  letter-spacing:.02em;overflow-wrap:anywhere}
.plat-row dt::before{content:"";display:inline-block;width:7px;height:7px;margin-right:10px;
  border-radius:1px;background:var(--accent);vertical-align:1px}
.plat-row dd{color:var(--ink-dim);font-size:15.5px;line-height:1.62;max-width:68ch}

/* ── 3. Path to production ────────────────────────────────────── */
.plat-path{margin-top:clamp(36px,5vw,56px);display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;counter-reset:none}
.plat-step{position:relative;display:flex;flex-direction:column;gap:8px;min-height:148px;
  padding:20px 20px 22px;border:1px solid var(--rule);border-radius:12px;background:var(--bg-1)}
.plat-step__n{font-family:var(--mono);font-size:12px;color:var(--ink-dim);letter-spacing:.1em}
.plat-step__job{font-family:var(--mono);font-size:14px;font-weight:500;color:var(--ink);
  line-height:1.45;overflow-wrap:anywhere}
.plat-step__d{color:var(--ink-dim);font-size:14px;line-height:1.55}
.plat-step--manual{border-color:rgba(226,72,61,.55);background:linear-gradient(180deg,rgba(216,58,46,.10),var(--bg-1))}
.plat-step__badge{display:inline-block;margin-left:6px;padding:2px 8px;border-radius:999px;
  border:1px solid rgba(226,72,61,.6);color:#ff9b91;font-size:10.5px;letter-spacing:.08em;
  text-transform:uppercase;vertical-align:1px;white-space:nowrap}

/* ── 4. Proof ─────────────────────────────────────────────────── */
.plat-live{margin-top:clamp(32px,4vw,48px);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  border-top:1px solid var(--rule-strong)}
.plat-live li{border-bottom:1px solid var(--rule-strong)}
.plat-live li:nth-child(odd){border-right:1px solid var(--rule-strong)}
.plat-live__item{display:grid;grid-template-columns:auto minmax(0,1fr) auto;column-gap:14px;row-gap:4px;
  align-items:center;min-height:96px;padding:22px clamp(16px,2.4vw,28px);color:var(--ink);
  text-decoration:none;transition:background-color .2s ease}
.plat-live__item:hover{background:rgba(255,255,255,.035)}
.plat-live__dot{width:9px;height:9px;border-radius:50%;background:var(--ai);
  box-shadow:0 0 0 4px rgba(34,197,94,.16)}
.plat-live__host{font-family:var(--serif);font-weight:700;font-size:clamp(22px,2.4vw,30px);line-height:1.15;
  overflow-wrap:anywhere}
.plat-live__what{grid-column:2;color:var(--ink-dim);font-size:14.5px;line-height:1.5}
.plat-live__go{grid-column:3;grid-row:1 / span 2;color:var(--ink-dim);transition:color .2s ease}
.plat-live__item:hover .plat-live__go{color:var(--web)}
.plat-note{margin-top:22px;color:var(--ink-dim);font-size:14.5px;line-height:1.6;max-width:72ch}

/* ── 5. Two ways in ───────────────────────────────────────────── */
.plat-ways{margin-top:clamp(32px,4vw,48px);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.plat-way{display:flex;flex-direction:column;align-items:flex-start;gap:16px;
  padding:clamp(24px,3vw,36px);border:1px solid var(--rule);border-radius:16px;background:var(--bg-1)}
.plat-way--main{border-color:rgba(226,72,61,.5);
  background:linear-gradient(180deg,rgba(216,58,46,.09),var(--bg-1) 60%)}
.plat-way p{color:var(--ink-dim);font-size:15.5px;line-height:1.65;max-width:56ch}
.plat-way .plat-btn{margin-top:auto}

/* ── 6. Brief form: only the states the shared partial does not style ── */
.plat .codei-form-wrap{background:var(--bg-0)}
.plat .codei-form__ok,.plat .codei-form__err{max-width:680px;margin:24px auto 0}
.plat .codei-form__err{background:rgba(216,58,46,.10);border:1px solid rgba(226,72,61,.45);
  border-radius:12px;padding:16px 18px;font-size:14.5px}
.plat .codei-submit{min-height:48px}
.plat .codei-submit:focus-visible,.plat .codei-input:focus-visible,.plat .codei-textarea:focus-visible,
.plat .codei-file:focus-visible{outline:2px solid #fff;outline-offset:2px}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width:980px){
  .plat-hero__grid{grid-template-columns:1fr}
  .plat-path{grid-template-columns:repeat(2,minmax(0,1fr))}
  .plat-spec__group{grid-template-columns:1fr;gap:18px}
}
@media (max-width:640px){
  .plat-row{grid-template-columns:1fr;gap:4px}
  .plat-live{grid-template-columns:1fr}
  .plat-live li:nth-child(odd){border-right:0}
  .plat-ways{grid-template-columns:1fr}
  .plat-path{grid-template-columns:1fr}
  .plat-step{min-height:0}
  .plat-btn{width:100%}
  .plat-way .plat-btn{width:100%}
  .plat-layer{padding:14px 14px 14px 14px}
}

@media (prefers-reduced-motion:reduce){
  .plat *,.plat *::before,.plat *::after{transition:none !important;animation:none !important}
}

/* prices: a plain ledger, the figure right-aligned in the mono face */
.plat-prices__title{margin-top:44px}
.plat-prices{margin:14px 0 0;border-top:1px solid var(--line)}
.plat-prices__row{display:flex;gap:24px;align-items:baseline;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line)}
.plat-prices dt{color:var(--ink);font-size:15.5px;line-height:1.5}
.plat-prices dd{margin:0;white-space:nowrap;font-family:"JetBrains Mono",ui-monospace,monospace;font-size:15px;color:var(--ink);font-weight:500}
@media (max-width:560px){.plat-prices__row{flex-direction:column;gap:4px}}