/* ─── 01. TOKENS & VARIABLES ─── */
:root {
  /* Colors - Shifted to a premium 'Forge' dark palette */
  --bg: #07080B;
  --bg-elevated: #0D0E14;
  --bg-card: #12141C;
  --bg-card-hover: #181A24;
  
  --border: #1B1E2B;
  --border-light: #252A3D;
  
  --text-primary: #F4F2EC;
  --text-secondary: #A09B96;
  --text-muted: #64605C;
  
  /* The Forge Spark */
  --accent: #E58E26; 
  --accent-bright: #FFB347;
  --accent-dim: rgba(229, 142, 38, 0.12);
  
  /* Structured Secondary */
  --secondary: #4A90E2;
  --secondary-dim: rgba(74, 144, 226, 0.12);
  
  --error: #D65A5A;
  --error-dim: rgba(214, 90, 90, 0.10);

  /* Typography */
  --font-serif: 'Fraunces', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Z-Index Scale */
  --z-behind: -1;
  --z-base: 1;
  --z-nav: 100;
  --z-drawer: 200;
  --z-skip-link: 1000;
  
  /* Animations */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ─── 02. RESET & BASE ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: var(--z-behind);
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.02;
}

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

/* Accessibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  top: -50px;
  left: 0;
  background: var(--accent);
  color: var(--bg);
  padding: 12px 20px;
  z-index: var(--z-skip-link);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 14px;
  transition: top 0.3s var(--ease-out-expo);
}
.skip-link:focus { top: 0; }

/* ─── 03. TYPOGRAPHY & UTILITIES ─── */
h1, h2, h3, h4 { color: var(--text-primary); font-family: var(--font-serif); font-weight: 400; }
h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); line-height: 1.05; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.75rem); line-height: 1.15; letter-spacing: -0.01em; margin-bottom: 1rem; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); line-height: 1.3; margin-bottom: 0.75rem; }
em { font-style: italic; color: var(--accent); }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 clamp(24px, 5vw, 72px); }
.section-spacing { padding: clamp(90px, 12vw, 160px) 0; }
.bg-elevated { background: var(--bg-elevated); }
.border-y { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.align-center { text-align: center; display: flex; flex-direction: column; align-items: center; }
.text-accent { color: var(--accent) !important; }

/* ─── 04. COMPONENTS ─── */
/* Labels & Badges */
.section-label {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 1.25rem;
}
.badges-row {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin: 1.5rem auto 3.5rem;
}
.badge {
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 8px 14px; border-radius: 3px;
  border: 1px solid transparent;
}
.badge-accent { color: var(--accent); background: var(--accent-dim); border-color: rgba(229, 142, 38, 0.2); }
.badge-secondary { color: var(--secondary); background: var(--secondary-dim); border-color: rgba(74, 144, 226, 0.2); }

/* Buttons & Links */
.btn-primary {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.04em;
  color: var(--bg); background: var(--accent); padding: 18px 36px;
  text-decoration: none; font-weight: 500; border-radius: 2px;
  transition: background 0.3s ease, transform 0.3s var(--ease-out-expo);
}
.btn-primary:hover { background: var(--accent-bright); transform: translateY(-2px); }
.btn-primary svg { transition: transform 0.3s var(--ease-out-expo); }
.btn-primary:hover svg { transform: translateX(5px); }
.btn-large { padding: 20px 44px; font-size: 0.9rem; }

.link-action {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--secondary);
  text-decoration: none; letter-spacing: 0.03em; border-bottom: 1px solid transparent;
  padding-bottom: 3px; transition: all 0.3s ease; margin-top: 1.25rem;
}
.link-action:hover { border-bottom-color: currentColor; }
.link-action svg { width: 14px; height: 14px; transition: transform 0.3s var(--ease-out-expo); }
.link-action:hover svg { transform: translate(3px, -3px); }

/* Cards & Grids */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}
.gap-minimal { gap: 2px; background: var(--border); border: 1px solid var(--border); }
.gap-large { gap: clamp(40px, 6vw, 80px); }

.card { 
  background: var(--bg-card); 
  padding: clamp(2.5rem, 4vw, 4rem); 
  display: flex; 
  flex-direction: column; 
  transition: background 0.4s ease, transform 0.4s var(--ease-out-expo);
}
.card:hover { background: var(--bg-card-hover); }
.card-tag {
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 1.75rem; display: inline-flex; padding: 6px 12px; align-self: flex-start;
  border-radius: 2px;
}
.card-liability { border-top: 2px solid var(--error); }
.tag-liability { color: var(--error); background: var(--error-dim); }
.card-opportunity, .card-spec { border-top: 2px solid var(--accent); }
.tag-opportunity, .tag-spec { color: var(--accent); background: var(--accent-dim); }
.card-live { border-top: 2px solid var(--secondary); }
.tag-live { color: var(--secondary); background: var(--secondary-dim); }

/* ─── 05. HEADER & NAVIGATION ─── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-nav);
  height: 72px; background: rgba(7, 8, 11, 0.85);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-container { display: flex; justify-content: space-between; align-items: center; height: 100%; }

.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-mark { width: 34px; height: 34px; flex-shrink: 0; }
.logo-text { font-family: var(--font-mono); font-size: 1.05rem; font-weight: 500; letter-spacing: 0.04em; color: var(--text-primary); }
.logo-text span { color: var(--accent); }

.desktop-nav { display: none; align-items: center; gap: 2.5rem; }
.nav-list { display: flex; gap: 2.5rem; list-style: none; }
.nav-list a {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em;
  color: var(--text-muted); text-decoration: none; transition: color 0.3s ease;
}
.nav-list a:hover { color: var(--text-primary); }

@media (min-width: 900px) {
  .desktop-nav { display: flex; }
  .mobile-menu-toggle { display: none; }
}

/* Mobile Nav Toggle */
.mobile-menu-toggle {
  display: flex; flex-direction: column; gap: 6px; background: transparent;
  border: none; cursor: pointer; padding: 8px; z-index: calc(var(--z-drawer) + 1);
}
.hamburger-line {
  width: 26px; height: 2px; background: var(--text-primary);
  transition: transform 0.4s var(--ease-out-expo), opacity 0.4s ease;
}
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:first-child { transform: translateY(8px) rotate(45deg); }
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:last-child { transform: translateY(-8px) rotate(-45deg); }

/* Mobile Drawer */
.mobile-drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: 100%; max-width: 420px;
  background: var(--bg-card); z-index: var(--z-drawer);
  padding: 120px 2.5rem 2.5rem; transform: translateX(100%);
  transition: transform 0.5s var(--ease-out-expo), visibility 0s 0.5s;
  border-left: 1px solid var(--border);
  visibility: hidden;
}
.mobile-drawer.is-open { transform: translateX(0); visibility: visible; transition-delay: 0s; }
.mobile-nav-list { list-style: none; display: flex; flex-direction: column; gap: 1.75rem; }
.mobile-nav-list a { font-family: var(--font-serif); font-size: 1.75rem; color: var(--text-primary); text-decoration: none; }
.mobile-contact-btn { display: inline-block; margin-top: 1.5rem; font-family: var(--font-mono) !important; font-size: 0.9rem !important; color: var(--accent) !important; padding-bottom: 4px; border-bottom: 1px solid var(--accent); }

/* ─── 06. SECTIONS ─── */
/* Hero */
.hero { position: relative; padding-top: clamp(160px, 18vh, 220px); }
.hero .container { display: flex; flex-direction: column; align-items: center; text-align: center; }
.hero-glow {
  position: absolute; top: -15%; left: 50%; transform: translateX(-50%);
  width: min(900px, 100vw); height: 700px;
  background: radial-gradient(ellipse at center, var(--accent-dim) 0%, transparent 65%);
  pointer-events: none; z-index: var(--z-behind);
}
.hero-graphic {
  width: 80px; height: 80px; margin-bottom: 2.5rem;
}
.hero h1 { max-width: 980px; margin-bottom: 1.75rem; }
.hero-sub {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem); max-width: 720px; color: var(--text-secondary);
}
.hero-sub strong { color: var(--text-primary); font-weight: 500; }

/* Section Headers */
.section-header { max-width: 760px; margin-bottom: clamp(3.5rem, 6vw, 5rem); }

/* Approach List */
.numbered-list { list-style: none; counter-reset: app-counter; border-top: 1px solid var(--border); }
.numbered-list li { padding: 2rem 0; border-bottom: 1px solid var(--border); display: grid; grid-template-columns: 32px 1fr; gap: 1.5rem; }
.numbered-list .num { font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent); padding-top: 4px; }

/* Mechanism Steps */
.mech-step { background: var(--bg-card); padding: 3rem 2.5rem; transition: background 0.4s ease; }
.mech-step:hover { background: var(--bg-card-hover); }
.step-num { font-family: var(--font-mono); font-size: 0.65rem; color: var(--accent); letter-spacing: 0.1em; margin-bottom: 1.25rem; }
.mech-step p { font-size: 0.9rem; }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--border); border: 1px solid var(--border); margin: 2.5rem 0; }
.stat-box { background: var(--bg); padding: 1.5rem 1.25rem; }
.stat-val { display: block; font-family: var(--font-serif); font-size: 1.75rem; color: var(--text-primary); line-height: 1; margin-bottom: 0.35rem; }
.stat-label { display: block; font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; }

/* CTA */
.cta { position: relative; }
.cta-glow {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: min(900px, 100vw); height: 600px;
  background: radial-gradient(ellipse at center, var(--secondary-dim) 0%, transparent 65%);
  pointer-events: none; z-index: var(--z-behind);
}
.cta-sub { max-width: 560px; margin: 0 auto 3rem; font-size: 1.05rem; }
.cta-actions { display: flex; flex-direction: column; align-items: center; gap: 1.25rem; }
.legal-note { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); }

/* Contact */
.contact-layout { display: grid; grid-template-columns: 1fr; gap: 2px; background: var(--border); border: 1px solid var(--border); }
.contact-intro, .contact-form { background: var(--bg-card); padding: clamp(2.5rem, 5vw, 4.5rem); }
.contact-intro { display: flex; flex-direction: column; justify-content: space-between; }
.contact-note { margin-top: 2rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); }
.contact-form { position: relative; display: flex; flex-direction: column; gap: 1.5rem; }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
.field { display: flex; flex-direction: column; gap: 0.75rem; }
.field span { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-primary); }
.field input, .field textarea {
  width: 100%; border: 1px solid var(--border-light); background: var(--bg); color: var(--text-primary);
  padding: 1.1rem 1.25rem; font: inherit; resize: vertical; transition: border-color 0.3s ease, background 0.3s ease;
}
.field textarea { min-height: 180px; }
.field input::placeholder, .field textarea::placeholder { color: var(--text-muted); }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); background: var(--bg-elevated); }
.contact-form-footer { display: flex; flex-direction: column; align-items: flex-start; gap: 1.25rem; margin-top: 0.5rem; }
.contact-submit[disabled] { opacity: 0.6; cursor: wait; }
.form-status { min-height: 1.5rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); }
.form-status.is-success { color: var(--secondary); }
.form-status.is-error { color: var(--error); }
.form-honeypot { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (min-width: 640px) { .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 960px) { .contact-layout { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); } }

/* Footer */
.site-footer { padding: 3rem 0; border-top: 1px solid var(--border); background: var(--bg-elevated); }
.footer-container { display: flex; flex-direction: column; gap: 1.75rem; align-items: flex-start; }
.footer-info { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); line-height: 1.8;}
.footer-links { display: flex; gap: 2rem; }
.footer-links a { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); text-decoration: none; transition: color 0.3s ease; }
.footer-links a:hover { color: var(--text-primary); }
@media (min-width: 640px) { .footer-container { flex-direction: row; justify-content: space-between; align-items: center; } }

/* ─── 07. PROGRESSIVE ENHANCEMENT ANIMATIONS ─── */
.reveal { opacity: 1; transform: none; transition: opacity 0.9s var(--ease-out-expo), transform 0.9s var(--ease-out-expo); }
.js .reveal { opacity: 0; transform: translateY(24px); }
.js .reveal.is-visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }