/* ============================================================
   Fraimio — marketing site
   Aesthetic: architectural blueprint / cyanotype drafting sheet
   ============================================================ */

:root {
  --blueprint-bg: #0a2744;
  --blueprint-bg-deep: #061a2e;
  --blueprint-bg-light: #0f3560;
  --grid-fine: rgba(234, 242, 250, 0.045);
  --grid-strong: rgba(234, 242, 250, 0.09);
  --ink: #eaf2fa;
  --ink-dim: rgba(234, 242, 250, 0.66);
  --ink-faint: rgba(234, 242, 250, 0.38);
  --cyan: #5fc9f3;
  --cyan-soft: rgba(95, 201, 243, 0.5);
  --cyan-dim: rgba(95, 201, 243, 0.14);
  --redline: #ff5a36;
  --redline-dim: rgba(255, 90, 54, 0.16);

  --font-display: "Big Shoulders Display", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --font-body: "IBM Plex Sans", sans-serif;

  --max-width: 1180px;
  --edge: clamp(24px, 5vw, 72px);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(var(--grid-strong) 1px, transparent 1px) 0 0 / 88px 88px,
    linear-gradient(90deg, var(--grid-strong) 1px, transparent 1px) 0 0 / 88px 88px,
    linear-gradient(var(--grid-fine) 1px, transparent 1px) 0 0 / 22px 22px,
    linear-gradient(90deg, var(--grid-fine) 1px, transparent 1px) 0 0 / 22px 22px,
    radial-gradient(ellipse at 20% 0%, var(--blueprint-bg-light) 0%, transparent 60%),
    var(--blueprint-bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 700; margin: 0; letter-spacing: 0.01em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
code { font-family: var(--font-mono); background: rgba(234, 242, 250, 0.08); padding: 0.1em 0.4em; border-radius: 3px; font-size: 0.88em; }

::selection { background: var(--redline); color: #fff; }

:focus-visible {
  outline: 2px dashed var(--cyan);
  outline-offset: 3px;
}

.grain-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  filter: url(#grain);
  mix-blend-mode: overlay;
  opacity: 0.35;
}

/* ---------------- Topbar ---------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--edge);
  background: rgba(6, 26, 46, 0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--grid-strong);
}

.wordmark {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
}

.wordmark .bracket { color: var(--cyan); }
.wordmark.small { font-size: 1rem; }

.topnav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 36px);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.topnav a:not(.nav-cta) {
  position: relative;
  color: var(--ink-dim);
  transition: color 0.2s ease;
}
.topnav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -4px;
  height: 1px;
  background: var(--cyan);
  transition: right 0.25s ease;
}
.topnav a:not(.nav-cta):hover { color: var(--ink); }
.topnav a:not(.nav-cta):hover::after { right: 0; }

.nav-cta {
  border: 1px solid var(--cyan-soft);
  padding: 8px 16px;
  color: var(--cyan);
  transition: background 0.2s ease, color 0.2s ease;
}
.nav-cta:hover { background: var(--cyan); color: var(--blueprint-bg-deep); }

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 15px 28px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--redline);
  color: #fff5f2;
  border-color: var(--redline);
}
.btn-primary:hover { background: #ff7554; }

.btn-ghost {
  border-color: var(--grid-strong);
  color: var(--ink-dim);
}
.btn-ghost:hover { border-color: var(--cyan-soft); color: var(--ink); }

.btn-large { font-size: 0.95rem; padding: 19px 40px; }

/* ---------------- Layout helpers ---------------- */

main > section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(64px, 10vw, 128px) var(--edge);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 18px;
}

.section-head h2 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  line-height: 1.05;
  text-transform: uppercase;
}

.section-lede {
  max-width: 54ch;
  color: var(--ink-dim);
  margin-top: 20px;
  font-size: 1.05rem;
}

/* ---------------- Hero ---------------- */

.hero { padding-top: clamp(48px, 8vw, 96px) !important; padding-bottom: 0 !important; }

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-bottom: 28px;
}
.tag-dot {
  width: 7px; height: 7px;
  background: var(--redline);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--redline-dim);
}

.hero h1 {
  font-size: clamp(2.6rem, 6.4vw, 5.1rem);
  line-height: 0.96;
  text-transform: uppercase;
  color: var(--ink);
}

.hero .lede {
  margin-top: 28px;
  max-width: 52ch;
  font-size: 1.1rem;
  color: var(--ink-dim);
}

.hero-actions {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-diagram { width: 100%; }
.onion-diagram { width: 100%; height: auto; overflow: visible; }

.onion-diagram .ring {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.4;
  opacity: 0.85;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: draw-ring 1.8s ease forwards;
}
.onion-diagram .ring-4 { stroke: var(--ink-faint); stroke-dasharray: 6 6; animation-delay: 0s; }
.onion-diagram .ring-3 { animation-delay: 0.15s; opacity: 0.55; }
.onion-diagram .ring-2 { animation-delay: 0.3s; opacity: 0.75; }
.onion-diagram .ring-1 { animation-delay: 0.45s; opacity: 1; stroke-width: 1.8; }

.ai-spoke, .ai-crosscut {
  stroke: var(--redline);
  stroke-width: 1.6;
  opacity: 0.9;
}
.ai-spoke {
  stroke-dasharray: 260;
  stroke-dashoffset: 260;
  animation: draw-leader 1s ease forwards;
  animation-delay: 0.9s;
}
.ai-crosscut { stroke-dasharray: 5 5; }
.ai-spoke-dot, .ai-node { fill: var(--redline); }
.ai-label {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  fill: var(--redline);
  letter-spacing: 0.06em;
}
.ai-sublabel {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--ink-faint);
  letter-spacing: 0.03em;
}

.onion-diagram .dim-line, .onion-diagram .dim-tick { stroke: var(--ink-faint); stroke-width: 1; }
.onion-diagram .dim-label {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--ink-faint);
  letter-spacing: 0.05em;
}

.onion-diagram .leader {
  fill: none;
  stroke: var(--ink-faint);
  stroke-width: 1;
  stroke-dasharray: 260;
  stroke-dashoffset: 260;
  animation: draw-leader 0.9s ease forwards;
  animation-delay: 0.7s;
}
.onion-diagram .leader-dot { fill: var(--cyan); }
.onion-diagram .ring-label {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  fill: var(--ink);
  letter-spacing: 0.06em;
}
.onion-diagram .ring-sublabel {
  font-family: var(--font-mono);
  font-size: 10.5px;
  fill: var(--ink-faint);
}

@keyframes draw-ring { to { stroke-dashoffset: 0; } }
@keyframes draw-leader { to { stroke-dashoffset: 0; } }

.title-block {
  margin-top: clamp(48px, 8vw, 88px);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--grid-strong);
}
.title-block > div {
  padding: 14px var(--edge);
  border-right: 1px solid var(--grid-strong);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
}
.title-block > div:last-child { border-right: none; }
.title-block > div span {
  display: block;
  color: var(--ink-faint);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

/* ---------------- Detail / spec cards ---------------- */

.detail-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--grid-strong);
  border: 1px solid var(--grid-strong);
}

.detail-card {
  background: var(--blueprint-bg);
  padding: 40px;
  position: relative;
}

.detail-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border: 1px solid var(--cyan-soft);
  border-radius: 50%;
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 0.9rem;
  margin-bottom: 22px;
}

.detail-card h3 {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 600;
  text-transform: none;
  margin-bottom: 14px;
  letter-spacing: 0;
}

.detail-card p { color: var(--ink-dim); font-size: 0.98rem; }

.detail-card-featured {
  grid-column: 1 / -1;
  border-top: 1px solid var(--redline);
}
.detail-mark-featured { border-color: var(--redline); color: var(--redline); }

/* ---------------- AI surface / bill of materials ---------------- */

.bom-table { margin-top: 56px; border-top: 1px solid var(--grid-strong); }

.bom-head, .bom-row {
  display: grid;
  grid-template-columns: 60px 200px 1fr;
  gap: 24px;
  align-items: baseline;
}

.bom-head {
  padding: 12px 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--grid-strong);
}

.bom-row {
  padding: 22px 0;
  border-bottom: 1px solid var(--grid-strong);
  transition: background 0.2s ease;
}
.bom-row:hover { background: var(--cyan-dim); }

.bom-item { font-family: var(--font-mono); color: var(--cyan); font-size: 0.95rem; }
.bom-name { font-weight: 600; font-size: 1.02rem; }
.bom-desc { color: var(--ink-dim); font-size: 0.95rem; }

/* ---------------- Code sample ---------------- */

.code-window {
  margin-top: 56px;
  border: 1px solid var(--grid-strong);
  background: var(--blueprint-bg-deep);
  box-shadow: 0 30px 80px -30px rgba(0,0,0,0.6);
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--grid-strong);
}
.code-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--grid-strong); }
.code-filename {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
}
.copy-btn {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  background: transparent;
  border: 1px solid var(--grid-strong);
  padding: 5px 10px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.copy-btn:hover { color: var(--cyan); border-color: var(--cyan-soft); }

.code-window pre {
  margin: 0;
  padding: 28px clamp(18px, 4vw, 36px);
  overflow-x: auto;
}
.code-window code {
  background: none;
  padding: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--ink-dim);
  white-space: pre;
}
.c-kw { color: var(--redline); }
.c-type { color: var(--cyan); }
.c-fn { color: #ffd27a; }
.c-com { color: var(--ink-faint); font-style: italic; }

.callout-row {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.callout-row p {
  font-size: 0.9rem;
  color: var(--ink-dim);
  display: flex;
  gap: 12px;
}
.callout-mark {
  flex-shrink: 0;
  width: 20px; height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  border: 1px solid var(--redline);
  color: var(--redline);
  border-radius: 50%;
}

/* ---------------- Architecture stack ---------------- */

.stack-diagram { margin-top: 56px; }
.stack-diagram svg { width: 100%; height: auto; overflow: visible; }

.stack-dim, .stack-tick { stroke: var(--ink-faint); stroke-width: 1; }

.slab {
  stroke: var(--cyan);
  stroke-width: 1.2;
  fill: var(--cyan-dim);
  opacity: 0;
  transform: translateX(-16px);
  transform-box: fill-box;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.slab-2 { fill: rgba(95, 201, 243, 0.1); }
.slab-3 { fill: rgba(95, 201, 243, 0.07); }
.slab-4 { fill: rgba(255, 90, 54, 0.12); stroke: var(--redline); }

.stack-diagram.is-visible .slab { opacity: 1; transform: translateX(0); }
.stack-diagram.is-visible .slab-1 { transition-delay: 0s; }
.stack-diagram.is-visible .slab-2 { transition-delay: 0.12s; }
.stack-diagram.is-visible .slab-3 { transition-delay: 0.24s; }
.stack-diagram.is-visible .slab-4 { transition-delay: 0.36s; }

.slab-label {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  fill: var(--ink);
  letter-spacing: 0.05em;
}
.slab-detail {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--ink-faint);
}

/* ---------------- Specs strip ---------------- */

.specs-strip {
  border-top: 1px solid var(--grid-strong);
  border-bottom: 1px solid var(--grid-strong);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  max-width: none;
  padding: 0 !important;
}
.spec-item {
  padding: 40px var(--edge);
  border-right: 1px solid var(--grid-strong);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.spec-item:last-child { border-right: none; }
.spec-value {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--cyan);
}
.spec-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------------- CTA ---------------- */

.cta { text-align: center; }
.cta .eyebrow { display: block; }
.cta h2 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  text-transform: uppercase;
  margin-top: 6px;
}
.cta .section-lede { margin-inline: auto; margin-top: 22px; }
.cta .btn { margin-top: 8px; }

.contact-form {
  max-width: 480px;
  margin: 44px auto 0;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row { display: flex; flex-direction: column; gap: 8px; }
.form-row label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.form-row .optional { text-transform: none; letter-spacing: 0; }

.form-row input,
.form-row textarea {
  font-family: var(--font-body);
  font-size: 0.98rem;
  color: var(--ink);
  background: var(--blueprint-bg-deep);
  border: 1px solid var(--grid-strong);
  padding: 12px 14px;
  transition: border-color 0.2s ease;
  resize: vertical;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--cyan-soft);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  min-height: 1.2em;
}
.form-status.is-success { color: var(--cyan); }
.form-status.is-error { color: var(--redline); }

.contact-form button[type="submit"]:disabled { opacity: 0.6; cursor: not-allowed; }

/* ---------------- Footer ---------------- */

.site-footer {
  border-top: 1px solid var(--grid-strong);
  padding: 48px var(--edge) 0;
}
.footer-block { display: flex; align-items: baseline; gap: 20px; flex-wrap: wrap; padding-bottom: 32px; }
.footer-block p { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-faint); }
.footer-nav {
  display: flex;
  gap: 28px;
  padding-bottom: 32px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-dim);
  border-top: 1px solid var(--grid-strong);
  padding-top: 24px;
}
.footer-nav a:hover { color: var(--cyan); }
.footer-title-block { grid-template-columns: repeat(3, 1fr); }
.footer-title-block > div:last-child { border-right: none; }

/* ---------------- Scroll reveal ---------------- */

html.js-enabled .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
html.js-enabled .reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------------- Responsive ---------------- */

@media (max-width: 920px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-diagram { order: -1; max-width: 420px; margin: 0 auto; }
  .detail-grid { grid-template-columns: 1fr; }
  .callout-row { grid-template-columns: 1fr; }
  .specs-strip { grid-template-columns: repeat(2, 1fr); }
  .spec-item:nth-child(2) { border-right: none; }
  .title-block { grid-template-columns: repeat(2, 1fr); }
  .title-block > div:nth-child(2n) { border-right: none; }
  .footer-title-block { grid-template-columns: repeat(1, 1fr); }
  .bom-head, .bom-row { grid-template-columns: 50px 140px 1fr; gap: 16px; }
}

@media (max-width: 640px) {
  .bom-head { display: none; }
  .bom-row { grid-template-columns: 1fr; gap: 6px; }
  .bom-item { font-size: 0.8rem; }
  .topnav a:not(.nav-cta) { display: none; }
  .topbar { padding: 16px var(--edge); }
  .specs-strip { grid-template-columns: 1fr; }
  .spec-item { border-right: none; border-bottom: 1px solid var(--grid-strong); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .onion-diagram .ring, .onion-diagram .leader, .reveal, .slab {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
    stroke-dashoffset: 0 !important;
  }
}