/* ============================================================
   AEP — Animal Equipment Platform
   Design system grounded in the product's real materials:
   charcoal neoprene, safety-orange kydex, NATO-green webbing.
   ============================================================ */

:root {
  /* Brand — pulled from actual prototype materials */
  --ink: #1D1E1A;        /* charcoal neoprene */
  --body-c: #33352C;
  --slate: #6B6D5C;
  --paper: #F1EEE2;       /* khaki-bone canvas */
  --panel: #E7E2CE;       /* deeper khaki panel */
  --line: #D6D0B8;
  --orange: #E15A24;      /* kydex safety-orange — primary accent */
  --orange-deep: #B8441A;
  --olive: #4B5320;       /* NATO green webbing — secondary accent */
  --olive-light: #6E7A3E;
  --charcoal-panel: #201F1A;
  --white: #FFFFFF;

  --font-display: "Archivo", "Arial Narrow", sans-serif;
  --font-body: "Public Sans", -apple-system, Segoe UI, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;

  --radius: 6px;
  --radius-lg: 14px;
  --max-width: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--body-c);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
ul { padding: 0; margin: 0; list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-2);
  color: var(--ink);
  text-transform: uppercase;
}
h1 { font-size: clamp(2.4rem, 4.6vw, 4rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); }
h3 { font-size: 1.15rem; }

p { margin: 0 0 var(--space-2); color: var(--slate); }
p:last-child { margin-bottom: 0; }
.lede { font-size: 1.2rem; line-height: 1.55; color: var(--body-c); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  margin-bottom: var(--space-2);
  font-weight: 600;
}
.eyebrow::before { content: "//"; color: var(--olive); }

.spec {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--slate);
  letter-spacing: 0.02em;
}

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-3); }
.section { padding: var(--space-6) 0; }
.section-tight { padding: var(--space-5) 0; }
.section-alt { background: var(--panel); }
.center { text-align: center; }

.grid { display: grid; gap: var(--space-3); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 1em 1.8em;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-orange { background: var(--orange); color: var(--white); }
.btn-orange:hover { background: var(--orange-deep); transform: translateY(-2px); }
.btn-ghost { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-on-dark { background: transparent; border-color: rgba(255,255,255,0.35); color: var(--white); }
.btn-on-dark:hover { border-color: var(--orange); background: rgba(255,255,255,0.06); }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(241, 238, 226, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; padding: var(--space-1) var(--space-3); }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.brand-mark { width: 34px; height: 34px; }
.brand-word {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.brand-word span { color: var(--orange); }
.brand-tagline {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--slate);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-left: 0.6rem;
  padding-left: 0.6rem;
  border-left: 1px solid var(--line);
}
@media (min-width: 640px) { .brand-tagline { display: inline; } }

.nav-links { display: flex; gap: var(--space-4); align-items: center; }
.nav-links a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--slate);
}
.nav-links a:hover { color: var(--ink); }
.nav-cta { display: flex; align-items: center; gap: var(--space-3); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; }

@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 60px 0 0 0; background: var(--paper);
    flex-direction: column; justify-content: flex-start;
    padding: var(--space-4) var(--space-3); gap: var(--space-3);
    transform: translateX(100%); transition: transform 0.25s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-cta .btn-orange { display: none; }
  .nav-toggle { display: block; }
}

/* ---------- Hero ---------- */
.hero { padding: var(--space-6) 0 var(--space-5); overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1fr 0.95fr; gap: var(--space-5); align-items: center; }
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 380px; margin: 0 auto; }
}
.hero-cta-row { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-top: var(--space-3); }
.hero-note {
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--slate);
  border-left: 2px solid var(--orange);
  padding-left: 0.8em;
}

/* Exploded-diagram illustration */
.exploded-diagram { width: 100%; height: auto; }
.diagram-line { stroke: var(--ink); stroke-width: 1.6; fill: none; }
.diagram-line-orange { stroke: var(--orange); stroke-width: 1.8; fill: none; }
.diagram-line-ghost { stroke: var(--slate); stroke-width: 1.3; fill: none; stroke-dasharray: 5 4; opacity: 0.8; }
.diagram-line-orange-ghost { stroke: var(--orange); stroke-width: 1.4; fill: none; stroke-dasharray: 5 4; opacity: 0.75; }
.diagram-guide { stroke: var(--slate); stroke-width: 1; stroke-dasharray: 4 4; fill: none; opacity: 0.7; }
.diagram-label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.04em;
  fill: var(--body-c);
}
.diagram-label-orange { fill: var(--orange-deep); font-weight: 700; }
.diagram-draw {
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  animation: draw-diagram 2.2s 0.2s ease forwards;
}
@keyframes draw-diagram { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) {
  .diagram-draw { stroke-dashoffset: 0; animation: none; }
}

/* ---------- Numbered system blocks ---------- */
.sys-block { display: flex; gap: var(--space-3); align-items: flex-start; padding: var(--space-3) 0; border-top: 1px solid var(--line); }
.sys-block:first-child { border-top: none; padding-top: 0; }
.sys-num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--orange);
  font-weight: 700;
  flex-shrink: 0;
  width: 2.4em;
}

/* ---------- Cards ---------- */
.card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-3); }
.tick-list li {
  display: flex; gap: 0.7em; padding: 0.6em 0; color: var(--body-c);
  border-bottom: 1px solid var(--line);
}
.tick-list li:last-child { border-bottom: none; }
.tick-list svg { flex-shrink: 0; width: 16px; height: 16px; margin-top: 4px; stroke: var(--orange); fill: none; stroke-width: 2.4; }

/* ---------- Dark panel ---------- */
.panel-dark {
  background: var(--charcoal-panel);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.panel-dark h2, .panel-dark h3 { color: var(--white); }
.panel-dark p { color: rgba(255,255,255,0.72); }
.panel-dark .eyebrow { color: var(--orange); }

/* ---------- Form ---------- */
.field { margin-bottom: var(--space-3); }
.field label {
  display: block; font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--slate);
  margin-bottom: 0.5em;
}
.field input {
  width: 100%; padding: 0.9em 1em; border: 1.5px solid var(--line);
  border-radius: var(--radius); background: var(--white);
  font-family: var(--font-body); font-size: 1rem; color: var(--ink);
}
.field input:focus { border-color: var(--orange); outline: none; }
.hp-field { position: absolute; left: -9999px; }
.signup-form { display: flex; gap: var(--space-2); flex-wrap: wrap; align-items: flex-end; }
.signup-form .field { flex: 1 1 240px; margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--charcoal-panel); color: rgba(255,255,255,0.65); padding: var(--space-5) 0 var(--space-3); }
.footer-top { display: flex; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; padding-bottom: var(--space-4); border-bottom: 1px solid rgba(255,255,255,0.12); }
.footer-brand .brand-word { color: var(--white); }
.footer-brand p { color: rgba(255,255,255,0.55); max-width: 320px; margin-top: var(--space-1); }
.footer-nav { display: flex; gap: var(--space-5); flex-wrap: wrap; }
.footer-nav h4 { color: var(--orange); font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: var(--space-2); }
.footer-nav a { display: block; text-decoration: none; color: rgba(255,255,255,0.7); padding: 0.3em 0; font-size: 0.92rem; }
.footer-nav a:hover { color: var(--orange); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-2);
  padding-top: var(--space-3); font-family: var(--font-mono); font-size: 0.74rem;
}
.footer-bottom a { text-decoration: none; color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: var(--orange); }

.skip-link { position: absolute; left: -9999px; background: var(--ink); color: var(--white); padding: 0.8em 1.2em; z-index: 100; }
.skip-link:focus { left: var(--space-2); top: var(--space-2); }