/* ============================================================
   Super Engineering Works — Design System
   ============================================================ */

:root {
  /* Color tokens (defaults — overridable via Tweaks) */
  --ink: oklch(0.18 0.02 250);
  --ink-soft: oklch(0.32 0.04 250);
  --ink-mute: oklch(0.50 0.03 250);
  --ink-faint: oklch(0.72 0.02 250);

  --paper: oklch(0.99 0.003 90);
  --paper-2: oklch(0.965 0.005 90);
  --paper-3: oklch(0.93 0.008 90);
  --rule: oklch(0.88 0.01 250);
  --rule-strong: oklch(0.78 0.015 250);

  --brand: oklch(0.34 0.07 250);          /* steel blue */
  --brand-2: oklch(0.46 0.09 245);
  --brand-deep: oklch(0.22 0.05 250);

  --accent: oklch(0.68 0.17 50);          /* safety orange */
  --accent-deep: oklch(0.55 0.18 45);

  --ok: oklch(0.62 0.12 150);
  --warn: oklch(0.72 0.15 80);

  /* Type */
  --f-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Manrope", "Helvetica Neue", Arial, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;

  /* Radii / shadow */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(20, 30, 50, 0.04), 0 0 0 1px oklch(0.88 0.01 250);
  --shadow-md: 0 6px 24px -8px rgba(20, 30, 50, 0.18), 0 0 0 1px oklch(0.88 0.01 250);
  --shadow-lg: 0 24px 60px -20px rgba(20, 30, 50, 0.28);

  /* Spacing rhythm */
  --pad-page: clamp(20px, 4vw, 56px);
  --max-w: 1360px;
}

[data-theme="dark"] {
  --ink: oklch(0.96 0.005 90);
  --ink-soft: oklch(0.85 0.01 90);
  --ink-mute: oklch(0.65 0.02 250);
  --ink-faint: oklch(0.45 0.02 250);

  --paper: oklch(0.16 0.015 250);
  --paper-2: oklch(0.20 0.018 250);
  --paper-3: oklch(0.25 0.02 250);
  --rule: oklch(0.30 0.02 250);
  --rule-strong: oklch(0.40 0.03 250);

  --brand: oklch(0.72 0.10 245);
  --brand-2: oklch(0.62 0.12 245);
  --brand-deep: oklch(0.85 0.05 245);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4), 0 0 0 1px oklch(0.30 0.02 250);
  --shadow-md: 0 6px 24px -8px rgba(0,0,0,0.5), 0 0 0 1px oklch(0.30 0.02 250);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
a { color: inherit; text-decoration: none; }
input, textarea, select { font: inherit; color: inherit; }

/* Typography */
.h-display {
  font-family: var(--f-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 0.98;
  text-wrap: balance;
}
.h-1 { font-size: clamp(48px, 7vw, 110px); }
.h-2 { font-size: clamp(36px, 4.6vw, 68px); letter-spacing: -0.02em; line-height: 1.02; }
.h-3 { font-size: clamp(24px, 2.4vw, 36px); letter-spacing: -0.015em; line-height: 1.1; }
.h-4 { font-size: clamp(18px, 1.4vw, 22px); letter-spacing: -0.01em; line-height: 1.25; }

.eyebrow {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--brand);
}
.eyebrow.no-bar::before { display: none; }

.lede {
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.55;
  color: var(--ink-soft);
  text-wrap: pretty;
  max-width: 60ch;
}

.mono { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.06em; }

/* Layout helpers */
.page {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding-inline: var(--pad-page);
}
.section { padding-block: clamp(72px, 9vw, 140px); }
.section-tight { padding-block: clamp(48px, 6vw, 96px); }

.rule { height: 1px; background: var(--rule); border: 0; margin: 0; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.005em;
  transition: transform .15s ease, background .2s ease, color .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--ink);
  color: var(--paper);
}
.btn--primary:hover { background: var(--brand); }
.btn--accent {
  background: var(--accent);
  color: oklch(0.18 0.02 30);
}
.btn--accent:hover { background: var(--accent-deep); color: var(--paper); }
.btn--ghost {
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  background: transparent;
}
.btn--ghost:hover { background: var(--paper-2); border-color: var(--ink); }
.btn--lg { padding: 18px 26px; font-size: 16px; }
.btn .arrow {
  width: 18px; height: 18px;
  display: grid; place-items: center;
  transition: transform .2s ease;
}
.btn:hover .arrow { transform: translateX(4px); }

/* Inputs */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field label {
  font-family: var(--f-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
}
.input, .textarea, .select {
  width: 100%;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-md);
  padding: 14px 16px;
  font-size: 15px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input:focus, .textarea:focus, .select:focus {
  outline: 0;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px oklch(0.34 0.07 250 / 0.15);
}
.textarea { min-height: 120px; resize: vertical; font-family: inherit; }

/* Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s ease;
}
.chip:hover { border-color: var(--ink); }
.chip--active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* Card */
.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
}

/* Image slot styling overrides */
image-slot {
  border-radius: var(--r-md);
}

/* Marquee */
.marquee-track {
  display: flex;
  gap: 80px;
  animation: marquee 38s linear infinite;
  width: max-content;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Spec block — used throughout for "data readout" feel */
.spec {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.spec dt { color: var(--ink-faint); }
.spec dd { margin: 0; color: var(--ink-soft); }

/* Cross-hatch placeholder */
.hatch {
  background-image:
    repeating-linear-gradient(135deg,
      transparent 0 10px,
      oklch(0.92 0.01 250) 10px 11px);
  background-color: var(--paper-2);
}

/* Scroll-reveal: fade-up on enter */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: translateY(0); }

/* Numeric counter style */
.stat-num {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(56px, 7vw, 96px);
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

/* Tag pill (small) */
.tag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--paper-3);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* Grid utility */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Page transition */
.page-enter { animation: pageIn .55s cubic-bezier(.2,.7,.2,1) both; }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Selection */
::selection { background: var(--accent); color: oklch(0.18 0.02 30); }

/* Scrollbar accent */
html { scrollbar-color: var(--rule-strong) var(--paper); }