/* =========================================================================
   DeviceSMTP — Design System
   Reliable Email Delivery for Every Device.
   Hand-built, dependency-free. Tokens → primitives → components → pages.
   ========================================================================= */

/* ---- Fonts (self-hosted, variable) ------------------------------------- */
@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/inter-var.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/jetbrains-mono-var.woff2") format("woff2");
  font-weight: 100 800;
  font-display: swap;
  font-style: normal;
}

/* ---- Design tokens ----------------------------------------------------- */
:root {
  /* Brand palette — technical, infrastructural */
  --navy-950: #060b16;
  --navy-900: #0a1120;
  --navy-850: #0d1526;
  --navy-800: #111c33;
  --navy-700: #1a2742;
  --navy-600: #273655;

  --ink: #0b1626;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50:  #f8fafc;
  --white: #ffffff;

  /* Accent — electric cyan → blue */
  --cyan-400: #2dd4e8;
  --cyan-500: #14b8d4;
  --cyan-600: #0e92ac;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;

  /* Status */
  --green-500: #22c55e;
  --green-400: #4ade80;
  --amber-500: #f59e0b;
  --red-500:   #ef4444;

  /* Semantic */
  --bg: var(--white);
  --bg-subtle: var(--slate-50);
  --surface: var(--white);
  --border: var(--slate-200);
  --border-strong: var(--slate-300);
  --text: var(--ink);
  --text-muted: var(--slate-600);
  --text-faint: var(--slate-500);
  --accent: var(--cyan-600);
  --accent-ink: #063a46;

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Fluid type scale (1.250 major third, clamped) */
  --step--1: clamp(0.82rem, 0.79rem + 0.12vw, 0.88rem);
  --step-0:  clamp(1rem, 0.96rem + 0.18vw, 1.09rem);
  --step-1:  clamp(1.2rem, 1.12rem + 0.38vw, 1.45rem);
  --step-2:  clamp(1.45rem, 1.3rem + 0.72vw, 1.95rem);
  --step-3:  clamp(1.75rem, 1.5rem + 1.2vw, 2.6rem);
  --step-4:  clamp(2.1rem, 1.7rem + 1.9vw, 3.4rem);
  --step-5:  clamp(2.5rem, 1.9rem + 3vw, 4.4rem);

  /* Spacing scale */
  --sp-1: 0.25rem; --sp-2: 0.5rem; --sp-3: 0.75rem; --sp-4: 1rem;
  --sp-5: 1.5rem; --sp-6: 2rem; --sp-7: 3rem; --sp-8: 4rem;
  --sp-9: 6rem; --sp-10: 8rem;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --container: 1200px;
  --container-narrow: 820px;

  --shadow-sm: 0 1px 2px rgba(11,22,38,.06), 0 1px 3px rgba(11,22,38,.08);
  --shadow: 0 4px 12px rgba(11,22,38,.06), 0 12px 28px rgba(11,22,38,.08);
  --shadow-lg: 0 10px 30px rgba(11,22,38,.10), 0 30px 60px rgba(11,22,38,.12);
  --shadow-glow: 0 0 0 1px rgba(20,184,212,.25), 0 8px 30px rgba(20,184,212,.18);

  --ring: 0 0 0 3px rgba(20,184,212,.35);
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---- Reset ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}
body {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.62;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "cv11", "ss01";
}
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
ul, ol { list-style: none; padding: 0; }
:focus-visible { outline: none; box-shadow: var(--ring); border-radius: var(--radius-sm); }

/* ---- Typography -------------------------------------------------------- */
h1, h2, h3, h4 { line-height: 1.12; letter-spacing: -0.02em; font-weight: 680; color: var(--text); }
h1 { font-size: var(--step-5); letter-spacing: -0.035em; }
h2 { font-size: var(--step-4); letter-spacing: -0.03em; }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); font-weight: 650; }
p { color: var(--text-muted); }
strong { color: var(--text); font-weight: 650; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.9em; }
:not(pre) > code {
  background: var(--slate-100); color: var(--accent-ink);
  padding: .12em .4em; border-radius: 5px; border: 1px solid var(--border);
  font-size: 0.86em;
}

/* ---- Layout primitives ------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--sp-5); }
.narrow { max-width: var(--container-narrow); margin-inline: auto; }
.section { padding-block: clamp(3.5rem, 2rem + 7vw, 7rem); }
.section-sm { padding-block: clamp(2.5rem, 1.5rem + 4vw, 4.5rem); }
.stack > * + * { margin-top: var(--sp-4); }
.grid { display: grid; gap: var(--sp-5); }
.center { text-align: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .5em;
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: .14em; text-transform: uppercase; font-weight: 600;
  color: var(--accent);
}
.eyebrow::before {
  content: ""; width: 1.6em; height: 1px; background: currentColor; opacity: .55;
}
.section-head { max-width: 46rem; margin-bottom: var(--sp-7); }
.section-head.center { margin-inline: auto; }
.lead { font-size: var(--step-1); color: var(--text-muted); line-height: 1.55; }
.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }

/* Gradient accent text */
.grad {
  background: linear-gradient(100deg, var(--cyan-500), var(--blue-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55em;
  font-weight: 600; font-size: var(--step-0); line-height: 1;
  padding: .85em 1.4em; border-radius: var(--radius);
  border: 1px solid transparent; cursor: pointer;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 1.1em; height: 1.1em; }
.btn-primary {
  background: linear-gradient(100deg, var(--cyan-500), var(--blue-500));
  color: var(--white); box-shadow: var(--shadow-sm);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.btn-secondary {
  background: var(--white); color: var(--text); border-color: var(--border-strong);
}
.btn-secondary:hover { border-color: var(--slate-400); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn-ghost { background: transparent; color: var(--text); }
.btn-ghost:hover { background: var(--slate-100); }
.btn-lg { padding: 1.05em 1.8em; font-size: var(--step-1); }
.on-dark .btn-secondary { background: rgba(255,255,255,.06); color: var(--white); border-color: rgba(255,255,255,.22); }
.on-dark .btn-secondary:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.4); }

/* ---- Cards ------------------------------------------------------------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: var(--sp-6); transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.card-hover:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.card .icon { margin-bottom: var(--sp-4); }
.card h3, .card h4 { margin-bottom: var(--sp-2); }
.card p { font-size: var(--step-0); }

/* Icon chip */
.chip-icon {
  display: inline-grid; place-items: center; width: 48px; height: 48px;
  border-radius: 12px; background: linear-gradient(145deg, rgba(45,212,232,.16), rgba(59,130,246,.14));
  border: 1px solid rgba(20,184,212,.25); color: var(--accent);
}
.chip-icon svg { width: 24px; height: 24px; }

/* Pills / badges */
.badge {
  display: inline-flex; align-items: center; gap: .45em;
  font-size: var(--step--1); font-weight: 600; padding: .35em .75em;
  border-radius: 999px; background: var(--slate-100); color: var(--slate-600);
  border: 1px solid var(--border);
}
.badge-accent { background: rgba(20,184,212,.1); color: var(--accent); border-color: rgba(20,184,212,.25); }
.badge-green { background: rgba(34,197,94,.1); color: #15803d; border-color: rgba(34,197,94,.25); }
.badge-soon { background: rgba(245,158,11,.12); color: #b45309; border-color: rgba(245,158,11,.3); }
.badge-dot::before { content:""; width:.5em; height:.5em; border-radius:999px; background: currentColor; }

/* ---- Grid helpers ------------------------------------------------------ */
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px){ .cols-3, .cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px){ .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; } }

/* ---- Surfaces ---------------------------------------------------------- */
.bg-subtle { background: var(--bg-subtle); }
.bg-dark {
  background:
    radial-gradient(1100px 500px at 15% -10%, rgba(20,184,212,.16), transparent 55%),
    radial-gradient(900px 480px at 95% 0%, rgba(59,130,246,.14), transparent 50%),
    var(--navy-950);
  color: var(--slate-300);
}
.bg-dark h1, .bg-dark h2, .bg-dark h3, .bg-dark h4 { color: var(--white); }
.bg-dark .muted, .bg-dark p { color: var(--slate-400); }
.bg-dark .card { background: rgba(255,255,255,.03); border-color: rgba(255,255,255,.09); }
.bg-dark .lead { color: var(--slate-300); }
.hr { height:1px; background: var(--border); border:0; margin-block: var(--sp-6); }

/* ---- Header / nav ------------------------------------------------------ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82); backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: var(--sp-5); height: 68px; }
.brand { display: inline-flex; align-items: center; gap: .6em; font-weight: 700; font-size: 1.12rem; letter-spacing: -0.02em; color: var(--ink); }
.brand .logo { width: 30px; height: 30px; }
.brand b { font-weight: 700; }
.brand .brand-smtp { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: var(--sp-2); margin-left: var(--sp-4); }
.nav-links a {
  padding: .5em .7em; border-radius: var(--radius-sm); font-size: .95rem; font-weight: 500;
  color: var(--slate-600); transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--ink); background: var(--slate-100); }
.nav-links a.active { color: var(--ink); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: var(--sp-3); }
.nav-right .login { font-weight: 550; font-size: .95rem; color: var(--slate-600); padding:.5em .6em; }
.nav-right .login:hover { color: var(--ink); }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: var(--radius-sm); width: 42px; height: 40px; cursor: pointer; align-items:center; justify-content:center; }
.nav-toggle svg { width: 22px; height: 22px; color: var(--ink); }

@media (max-width: 920px){
  .nav-links, .nav-right .login, .nav-right .btn-ghost { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-right { margin-left: auto; }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu {
    border-bottom: 1px solid var(--border); background: var(--white);
    padding: var(--sp-4) var(--sp-5) var(--sp-6);
  }
  .mobile-menu a { display: block; padding: .8em .2em; border-bottom: 1px solid var(--slate-100); font-weight: 550; color: var(--slate-700); }
  .mobile-menu .btn { width: 100%; margin-top: var(--sp-4); }
}
@media (min-width: 921px){ .mobile-menu { display: none; } }

/* ---- Hero -------------------------------------------------------------- */
.hero { position: relative; overflow: hidden; padding-block: clamp(3.5rem, 2rem + 7vw, 6.5rem); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--sp-7); align-items: center; }
.hero h1 { margin-bottom: var(--sp-5); }
.hero .lead { max-width: 34rem; margin-bottom: var(--sp-6); }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-bottom: var(--sp-5); }
.hero-trust { display:flex; flex-wrap:wrap; gap: var(--sp-4) var(--sp-5); align-items:center; color: var(--slate-400); font-size: var(--step--1); }
.hero-trust .ok { display:inline-flex; align-items:center; gap:.4em; color: var(--slate-500); }
.hero-trust svg { width: 1.05em; height: 1.05em; color: var(--green-500); }
@media (max-width: 900px){ .hero-grid { grid-template-columns: 1fr; } .hero-art { order: -1; } }

.hero-art svg { width: 100%; height: auto; overflow: visible; }
.hero-dev { opacity: 0; animation: devIn .6s var(--ease) forwards; animation-delay: calc(var(--d) * 1s + .2s); }
@keyframes devIn { from { opacity:0; transform: translateX(-8px);} to {opacity:1; transform:none;} }
.flow {
  stroke-dasharray: 6 8; opacity:.9;
  animation: dash 1.6s linear infinite;
  animation-delay: calc(var(--d) * 1s);
}
@keyframes dash { to { stroke-dashoffset: -28; } }
@media (prefers-reduced-motion: reduce){
  .hero-dev{ opacity:1; animation:none;}
  .flow{ animation:none; stroke-dasharray:none;}
}

/* Dotted grid backdrop */
.dotgrid::before {
  content:""; position:absolute; inset:0; z-index:-1;
  background-image: radial-gradient(rgba(39,54,85,.07) 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, #000 40%, transparent 75%);
          mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, #000 40%, transparent 75%);
}

/* ---- Feature / step lists ---------------------------------------------- */
.feature { display: flex; gap: var(--sp-4); align-items: flex-start; }
.feature .chip-icon { flex: none; }
.feature h4 { margin-bottom: .25em; }
.feature p { font-size: var(--step-0); }

.steps { counter-reset: step; }
.step { position: relative; }
.step .num {
  font-family: var(--font-mono); font-weight: 600; font-size: .9rem;
  display:inline-grid; place-items:center; width: 2.4em; height: 2.4em; border-radius: 50%;
  background: var(--navy-900); color: var(--cyan-400); margin-bottom: var(--sp-4);
  border: 1px solid var(--navy-700);
}
.bg-dark .step .num { background: rgba(255,255,255,.05); }

/* Connector line between steps (desktop) */
.steps.cols-3 { position: relative; }
.steps.cols-3::before {
  content:""; position:absolute; top: calc(var(--sp-6) + 1.2em); left: 16%; right: 16%; height: 1px;
  background: repeating-linear-gradient(90deg, var(--border-strong) 0 6px, transparent 6px 12px);
  z-index: 0;
}
@media (max-width: 640px){ .steps.cols-3::before { display:none; } }
.step > * { position: relative; }

/* ---- Logos / device marquee ------------------------------------------- */
.devicestrip { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
@media (max-width: 760px){ .devicestrip { grid-template-columns: repeat(2, 1fr); } }
.devicetile {
  display:flex; align-items:center; gap: .8em; padding: var(--sp-4);
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--white);
  font-weight: 550; font-size: .95rem; color: var(--slate-700);
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.devicetile:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.devicetile svg { width: 26px; height: 26px; color: var(--accent); flex: none; }

/* ---- Code / terminal blocks ------------------------------------------- */
.terminal {
  background: var(--navy-950); border: 1px solid var(--navy-700); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-lg);
}
.terminal-bar { display:flex; align-items:center; gap:.5em; padding: .7em 1em; border-bottom: 1px solid var(--navy-800); background: rgba(255,255,255,.02); }
.terminal-bar .dot { width:11px; height:11px; border-radius:50%; background: var(--navy-600); }
.terminal-bar .title { margin-left:.6em; font-family: var(--font-mono); font-size:.8rem; color: var(--slate-500); }
.terminal pre { margin:0; padding: var(--sp-5); overflow-x: auto; font-family: var(--font-mono); font-size: .86rem; line-height: 1.7; color: var(--slate-300); }
.terminal .c-key { color: var(--cyan-400); }
.terminal .c-val { color: #e2e8f0; }
.terminal .c-ok { color: var(--green-400); }
.terminal .c-dim { color: var(--slate-500); }
.terminal .c-str { color: #fcd9a8; }

/* Config key/value table */
.kv { width:100%; border-collapse: collapse; font-size: .95rem; }
.kv td { padding: .7em 1em; border-bottom: 1px solid var(--border); }
.kv tr:last-child td { border-bottom: 0; }
.kv td:first-child { color: var(--text-muted); width: 42%; font-weight: 550; }
.kv td:last-child { font-family: var(--font-mono); color: var(--text); }
.kv-card { border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; background: var(--white); }

/* ---- Dashboard mockup -------------------------------------------------- */
.mock {
  border: 1px solid var(--navy-700); border-radius: var(--radius-lg); overflow: hidden;
  background: var(--navy-900); box-shadow: var(--shadow-lg);
}
.mock-top { display:flex; align-items:center; gap:.5em; padding:.7em 1em; border-bottom:1px solid var(--navy-800); }
.mock-top .dot{ width:10px;height:10px;border-radius:50%;background:var(--navy-600);}
.mock-top .url{ margin-left:.6em; font-family:var(--font-mono); font-size:.76rem; color:var(--slate-500);}
.mock-body{ padding: var(--sp-5); display:grid; gap: var(--sp-4); }
.mock-stats{ display:grid; grid-template-columns: repeat(3,1fr); gap: var(--sp-3);}
.mock-stat{ background: rgba(255,255,255,.03); border:1px solid var(--navy-800); border-radius: var(--radius); padding: var(--sp-4);}
.mock-stat .n{ font-size:1.5rem; font-weight:700; color:var(--white); letter-spacing:-.02em;}
.mock-stat .l{ font-size:.75rem; color:var(--slate-500); text-transform:uppercase; letter-spacing:.08em;}
.mock-row{ display:flex; align-items:center; justify-content:space-between; gap:var(--sp-3); padding:.7em .9em; background:rgba(255,255,255,.02); border:1px solid var(--navy-800); border-radius:var(--radius-sm); font-size:.85rem;}
.mock-row .dev{ display:flex; align-items:center; gap:.6em; color:var(--slate-300); font-weight:550;}
.mock-row .dev svg{ width:18px;height:18px;color:var(--cyan-400);}
.mock-row .st{ font-family:var(--font-mono); font-size:.76rem; display:inline-flex; align-items:center; gap:.4em; color:var(--green-400);}
.mock-row .st.fail{ color:#fca5a5; }
.mock-row .st::before{ content:""; width:.5em;height:.5em;border-radius:50%; background:currentColor;}

/* ---- Pricing ----------------------------------------------------------- */
.price-grid { display:grid; grid-template-columns: repeat(3,1fr); gap: var(--sp-5); align-items: stretch; }
@media (max-width: 960px){ .price-grid{ grid-template-columns:1fr; max-width: 30rem; margin-inline:auto;} }
.plan { display:flex; flex-direction:column; }
.plan.featured { border-color: var(--cyan-500); box-shadow: var(--shadow); position: relative; }
.plan.featured::before{
  content:"Most popular"; position:absolute; top:-.9em; left:50%; transform:translateX(-50%);
  background: linear-gradient(100deg,var(--cyan-500),var(--blue-500)); color:#fff;
  font-size:.72rem; font-weight:650; letter-spacing:.04em; padding:.35em .9em; border-radius:999px;
}
.plan .plan-name{ font-weight:650; font-size:1.1rem;}
.plan .plan-desc{ font-size:.9rem; color:var(--text-muted); min-height: 2.4em; }
.plan .price{ display:flex; align-items:baseline; gap:.2em; margin:var(--sp-4) 0;}
.plan .price .amt{ font-size: 2.4rem; font-weight:720; letter-spacing:-.03em; color:var(--ink);}
.plan .price .per{ color:var(--text-faint); font-size:.9rem;}
.plan .placeholder{ font-family:var(--font-mono); font-size:.78rem; color:var(--amber-500); }
.plan ul.feat{ display:grid; gap:.7em; margin:var(--sp-5) 0; }
.plan ul.feat li{ display:flex; gap:.6em; align-items:flex-start; font-size:.92rem; color:var(--slate-700);}
.plan ul.feat li svg{ width:1.15em;height:1.15em; color:var(--green-500); flex:none; margin-top:.15em;}
.plan ul.feat li.off{ color:var(--slate-400);}
.plan ul.feat li.off svg{ color:var(--slate-300);}
.plan .btn{ margin-top:auto; width:100%; }

/* ---- FAQ accordion ----------------------------------------------------- */
.faq { max-width: 50rem; margin-inline:auto; }
.faq details {
  border-bottom: 1px solid var(--border); padding: var(--sp-2) 0;
}
.faq summary {
  cursor: pointer; list-style: none; padding: var(--sp-4) 0; font-weight: 600; font-size: var(--step-1);
  display:flex; align-items:center; justify-content: space-between; gap: var(--sp-4); color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .plus { flex:none; width:1.4em;height:1.4em; position:relative; transition: transform .25s var(--ease); color: var(--accent); }
.faq summary .plus::before, .faq summary .plus::after{
  content:""; position:absolute; inset:0; margin:auto; background: currentColor;
}
.faq summary .plus::before{ width:100%; height:2px; }
.faq summary .plus::after{ width:2px; height:100%; transition: transform .25s var(--ease); }
.faq details[open] summary .plus::after{ transform: scaleY(0); }
.faq details[open] summary { color: var(--accent); }
.faq .faq-body { padding: 0 0 var(--sp-5); color: var(--text-muted); max-width: 44rem; }
.faq .faq-body p + p { margin-top: var(--sp-3); }

/* ---- Callout / note ---------------------------------------------------- */
.note {
  border: 1px solid var(--border); border-left: 3px solid var(--cyan-500);
  background: var(--slate-50); border-radius: var(--radius); padding: var(--sp-4) var(--sp-5);
  font-size: .95rem;
}
.note.warn { border-left-color: var(--amber-500); background: #fffbeb; }
.note strong { display:block; margin-bottom:.2em; }

/* ---- CTA band ---------------------------------------------------------- */
.cta-band {
  position: relative; overflow:hidden;
  background:
    radial-gradient(800px 400px at 20% 0%, rgba(20,184,212,.22), transparent 60%),
    radial-gradient(700px 400px at 90% 110%, rgba(59,130,246,.22), transparent 55%),
    var(--navy-950);
  color: var(--white); border-radius: var(--radius-xl);
  padding: clamp(2.5rem,1.5rem+4vw,4.5rem);
  text-align: center;
}
.cta-band h2 { color:#fff; margin-bottom: var(--sp-4); }
.cta-band p { color: var(--slate-300); max-width: 40rem; margin-inline:auto; margin-bottom: var(--sp-6); font-size: var(--step-1);}
.cta-band .hero-cta { justify-content:center; }

/* ---- Breadcrumb / page hero ------------------------------------------- */
.pagehero { padding-block: clamp(3rem, 2rem + 4vw, 5rem) clamp(1.5rem,1rem+2vw,2.5rem); }
.breadcrumb { font-size:.85rem; color:var(--text-faint); margin-bottom: var(--sp-4); display:flex; gap:.5em; flex-wrap:wrap;}
.breadcrumb a:hover{ color: var(--accent);}
.breadcrumb .sep{ color: var(--slate-300);}
.pagehero h1{ margin-bottom: var(--sp-4);}
.pagehero .lead{ max-width: 42rem;}

/* ---- Docs layout ------------------------------------------------------- */
.docs-layout { display:grid; grid-template-columns: 240px 1fr; gap: var(--sp-7); align-items:start; }
.docs-nav { position: sticky; top: 90px; font-size:.92rem; }
.docs-nav h5{ font-size:.75rem; text-transform:uppercase; letter-spacing:.1em; color:var(--text-faint); margin: var(--sp-4) 0 var(--sp-2);}
.docs-nav a{ display:block; padding:.4em .6em; border-radius:var(--radius-sm); color:var(--slate-600); }
.docs-nav a:hover{ background:var(--slate-100); color:var(--ink);}
.docs-nav a.active{ background: rgba(20,184,212,.1); color: var(--accent); font-weight:600;}
.docs-content h2{ scroll-margin-top: 90px; margin-top: var(--sp-7);}
.docs-content h2:first-child{ margin-top:0;}
.docs-content h3{ margin-top: var(--sp-6); font-size: var(--step-1);}
.docs-content p, .docs-content ul li { color: var(--text-muted); }
.docs-content ul.bullets{ list-style: disc; padding-left: 1.3em; display:grid; gap:.4em; }
.docs-content ul.bullets li{ padding-left:.2em; }
.docs-content > * + * { margin-top: var(--sp-4); }
@media (max-width: 860px){ .docs-layout{ grid-template-columns:1fr;} .docs-nav{ position:static; border-bottom:1px solid var(--border); padding-bottom: var(--sp-4);} }

/* ---- Forms ------------------------------------------------------------- */
.form { display:grid; gap: var(--sp-4); }
.field { display:grid; gap:.4em; }
.field label { font-weight: 600; font-size:.92rem; }
.field label .req { color: var(--red-500); }
.field input, .field textarea, .field select {
  width:100%; padding:.8em .9em; border:1px solid var(--border-strong); border-radius: var(--radius);
  background:var(--white); transition: border-color .15s, box-shadow .15s; font-size:.98rem;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--cyan-500); box-shadow: var(--ring); outline:none; }
.field textarea { min-height: 150px; resize: vertical; }
.field .hint { font-size:.82rem; color:var(--text-faint); }
.field .error-msg { font-size:.82rem; color:var(--red-500); display:none; }
.field.invalid input, .field.invalid textarea { border-color: var(--red-500); }
.field.invalid .error-msg { display:block; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:var(--sp-4);}
@media (max-width:560px){ .form-row{ grid-template-columns:1fr;} }
.form-status { padding: var(--sp-4) var(--sp-5); border-radius: var(--radius); font-weight:550; display:none; }
.form-status.show{ display:block;}
.form-status.ok{ background: rgba(34,197,94,.1); color:#15803d; border:1px solid rgba(34,197,94,.3);}
.form-status.err{ background: rgba(239,68,68,.08); color:#b91c1c; border:1px solid rgba(239,68,68,.3);}

/* ---- Footer ------------------------------------------------------------ */
.site-footer { background: var(--navy-950); color: var(--slate-400); padding-block: var(--sp-8) var(--sp-6); margin-top: var(--sp-8); }
.footer-grid { display:grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: var(--sp-6); }
@media (max-width: 860px){ .footer-grid{ grid-template-columns: 1fr 1fr;} }
@media (max-width: 520px){ .footer-grid{ grid-template-columns: 1fr 1fr;} }
.site-footer .brand { color:#fff; margin-bottom: var(--sp-4);}
.site-footer .tagline { font-size:.9rem; max-width: 24rem; color: var(--slate-500); }
.footer-col h5 { color:#fff; font-size:.8rem; text-transform:uppercase; letter-spacing:.1em; margin-bottom: var(--sp-4); font-weight:600; }
.footer-col a { display:block; padding:.32em 0; color: var(--slate-400); font-size:.92rem; }
.footer-col a:hover { color: var(--cyan-400); }
.footer-bottom { display:flex; flex-wrap:wrap; gap: var(--sp-3) var(--sp-5); justify-content:space-between; align-items:center;
  border-top:1px solid var(--navy-800); margin-top: var(--sp-7); padding-top: var(--sp-5); font-size:.85rem; color: var(--slate-500);}
.footer-bottom .legal { display:flex; gap: var(--sp-4); flex-wrap:wrap;}

/* ---- Misc utilities ---------------------------------------------------- */
/* Progressive enhancement: only hide pre-animation when JS is active.
   Without JS (or crawlers that don't run it) everything stays visible. */
.js .reveal { opacity:0; transform: translateY(14px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .reveal.in { opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){ .js .reveal{ opacity:1; transform:none;} }
.sr-only { position:absolute; width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0; }
.skip-link { position:absolute; left:-999px; top:0; background:var(--ink); color:#fff; padding:.6em 1em; border-radius:0 0 var(--radius) 0; z-index:100; }
.skip-link:focus { left:0; }
.mt-0{margin-top:0;} .mb-0{margin-bottom:0;}
.text-balance{ text-wrap: balance; }
.divider-label{ display:flex; align-items:center; gap:var(--sp-4); color:var(--text-faint); font-size:.85rem; }
.divider-label::before,.divider-label::after{ content:""; height:1px; background:var(--border); flex:1;}