/* ============================================================
 * Ægir Prediction — website v2 shared design system
 * ------------------------------------------------------------
 * Batch WEB2-1. Shared chrome for every page: tokens, reset,
 * nav, footer, buttons, typography, cards, reveal animations,
 * and the positioning rules for the abyss-canvas background
 * (marine snow + sonar ping engine in js/effects.js).
 *
 * Tokens mirror Aegir Prediction/DesignSystem.swift — same hex,
 * same names. Edit there first; mirror here.
 * ============================================================ */

:root {
  --abyss: #050A12;
  --ink: #0B1321;
  --hull: #132335;
  --gunmetal: #1B2A3F;
  --steel: #2A3F58;
  --brass: #B08D57;
  --brass-hi: #D0A850;
  --brass-low: #6E5735;
  --squall: #4FD1E0;
  --squall-dim: #2B7F8A;
  --ice: #E6F0F4;
  --foam: #C6E1EA;
  --fog: #7A8B97;
  --ray-direct: #4FD1E0;
  --ray-bottom: #F0B84A;
  --ray-surface: #E07AD6;
  --ray-cz: #8AF0C8;
  --warn: #F0B84A;
  --danger: #E05A5A;
  --ok: #8AF0C8;

  /* v2 additions — derived, not new hues */
  --hairline: rgba(176, 141, 87, 0.16);
  --hairline-strong: rgba(176, 141, 87, 0.32);
  --panel: linear-gradient(180deg, rgba(11, 19, 33, 0.72), rgba(5, 10, 18, 0.5));
  --glass-blur: blur(18px) saturate(150%);

  --font-display: 'Cinzel', serif;
  --font-ui: 'Inter', -apple-system, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --nav-h: 64px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
html::-webkit-scrollbar,
body::-webkit-scrollbar { width: 0; height: 0; display: none; }

body {
  font-family: var(--font-ui);
  font-weight: 400;
  line-height: 1.65;
  color: var(--foam);
  background: var(--abyss);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: rgba(79, 209, 224, 0.25); color: var(--ice); }

/* ============================================================
 * Background z-stack
 *   z=-4  .stage      drifting storm gradients (CSS only)
 *   z=-3  #godrays    WebGL volumetric shafts (hero pages)
 *   z=-2  #abyss      marine snow + sonar ping canvas (JS)
 *   z=-1  .grain      film-grain overlay
 * ============================================================ */
.stage {
  position: fixed;
  inset: 0;
  z-index: -4;
  background:
    radial-gradient(ellipse 1200px 800px at 18% 6%, rgba(79, 209, 224, 0.10) 0%, transparent 55%),
    radial-gradient(ellipse 900px 1200px at 96% 92%, rgba(176, 141, 87, 0.10) 0%, transparent 60%),
    radial-gradient(ellipse 600px 600px at 60% 50%, rgba(19, 35, 53, 0.6) 0%, transparent 70%),
    linear-gradient(180deg, #050810 0%, #0a1018 60%, #050810 100%);
}
.stage::before, .stage::after {
  content: "";
  position: absolute;
  inset: -10%;
  pointer-events: none;
  opacity: 0.4;
  mix-blend-mode: screen;
}
.stage::before {
  background: radial-gradient(ellipse 60% 40% at 30% 30%, rgba(79, 209, 224, 0.08), transparent 70%);
  animation: ag-drift1 30s ease-in-out infinite alternate;
}
.stage::after {
  background: radial-gradient(ellipse 50% 35% at 70% 70%, rgba(176, 141, 87, 0.07), transparent 70%);
  animation: ag-drift2 42s ease-in-out infinite alternate;
}
@keyframes ag-drift1 { 0% { transform: translate(-3%, -2%) scale(1); } 100% { transform: translate(4%, 3%) scale(1.1); } }
@keyframes ag-drift2 { 0% { transform: translate(2%, 3%) scale(1); } 100% { transform: translate(-3%, -4%) scale(1.15); } }

#godrays {
  position: fixed;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0.85;
}

#abyss {
  position: fixed;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
  transition: opacity 0.6s;
}
#abyss.is-off { opacity: 0; }

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.05;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.7'/></svg>");
  mix-blend-mode: overlay;
}

@media (prefers-reduced-motion: reduce) {
  .stage::before, .stage::after { animation: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
 * Top nav — shared across pages
 * ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 clamp(18px, 4vw, 44px);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  background: linear-gradient(180deg, rgba(5, 10, 18, 0.66), rgba(5, 10, 18, 0.0));
  border-bottom: 1px solid rgba(176, 141, 87, 0);
  transition: border-color 0.35s, background 0.35s;
}
.nav.scrolled {
  border-bottom: 1px solid var(--hairline);
  background: rgba(5, 10, 18, 0.88);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--brass-hi);
  text-decoration: none;
  white-space: nowrap;
}
.nav-brand .rune { color: var(--brass); font-size: 22px; line-height: 1; }
.nav-links { display: flex; gap: clamp(18px, 3vw, 36px); align-items: center; }
.nav-links a {
  color: var(--foam);
  text-decoration: none;
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
}
/* Right-hand action cluster — toggle (mobile) + CTA. */
.nav-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
/* Hamburger — hidden on wide layouts, revealed when the link row collapses. */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--hairline-strong);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.nav-toggle:hover { border-color: var(--brass); background: rgba(208, 168, 80, 0.08); }
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 0 auto;
  background: var(--brass-hi);
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--squall);
  transition: right 0.3s ease;
}
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }
.nav-links a:hover, .nav-links a.active { color: var(--squall); }
.nav-cta {
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ice);
  border: 1px solid var(--brass);
  padding: 10px 22px;
  border-radius: 4px;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.25s;
  background: linear-gradient(180deg, rgba(208, 168, 80, 0.08), rgba(208, 168, 80, 0));
}
.nav-cta:hover {
  background: rgba(208, 168, 80, 0.18);
  border-color: var(--brass-hi);
  color: var(--brass-hi);
  box-shadow: 0 0 24px rgba(208, 168, 80, 0.18);
}
/* Collapse the link row into a hamburger panel before it can crowd the
 * brand + CTA (the full row needs ~1200px once letter-spacing is counted). */
@media (max-width: 1200px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 10px;
    background: rgba(7, 13, 23, 0.97);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--hairline);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a {
    padding: 13px clamp(18px, 5vw, 44px);
    font-size: 12px;
    letter-spacing: 0.2em;
  }
  .nav-links a::after { display: none; }
}
@media (max-width: 420px) {
  .nav-brand { font-size: 15px; gap: 8px; }
  .nav-brand .rune { font-size: 19px; }
  .nav-cta { font-size: 10px; padding: 8px 13px; letter-spacing: 0.16em; }
}

/* ============================================================
 * Buttons
 * ============================================================ */
.btn {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-weight: 500;
  text-decoration: none;
  padding: 16px 36px;
  border-radius: 4px;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s, border-color 0.3s, color 0.3s;
  cursor: pointer;
  display: inline-block;
  border: 0;
}
.btn-primary {
  background: linear-gradient(180deg, var(--brass-hi), var(--brass));
  color: var(--abyss);
  border: 1px solid var(--brass-hi);
  box-shadow: 0 8px 24px rgba(208, 168, 80, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(208, 168, 80, 0.4);
}
.btn-ghost {
  background: transparent;
  color: var(--foam);
  border: 1px solid rgba(198, 225, 234, 0.3);
}
.btn-ghost:hover {
  background: rgba(79, 209, 224, 0.08);
  color: var(--squall);
  border-color: var(--squall);
}

/* ============================================================
 * Reveal-on-scroll
 * Hidden-until-revealed applies ONLY under html.js (set by a
 * tiny inline script in each page head) — no-JS visitors and
 * crawlers see everything immediately.
 * ============================================================ */
html.js .reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
html.js .reveal.in { opacity: 1; transform: translateY(0); }
html.js .reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
html.js .reveal-stagger.in > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.in > *:nth-child(1) { transition-delay: 0.04s; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 0.16s; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 0.28s; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 0.40s; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: 0.52s; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: 0.64s; }
.reveal-stagger.in > *:nth-child(7) { transition-delay: 0.76s; }
.reveal-stagger.in > *:nth-child(8) { transition-delay: 0.88s; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal, html.js .reveal-stagger > * { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
 * Cards / tiles / chips — shared vocabulary
 * ============================================================ */
.tile {
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 30px 28px;
  background: var(--panel);
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.45s, box-shadow 0.45s;
}
.tile:hover {
  transform: translateY(-5px);
  border-color: var(--brass);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.55), 0 0 40px rgba(79, 209, 224, 0.05);
}
.tile-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--brass);
  letter-spacing: 0.25em;
}
.tile-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  color: var(--ice);
  margin: 14px 0 12px;
  letter-spacing: 0.02em;
}
.tile-body { font-size: 14px; color: var(--foam); line-height: 1.65; }
.tile-meta {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--fog);
  letter-spacing: 0.22em;
  margin-top: 16px;
  text-transform: uppercase;
}
.tile::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 70px; height: 70px;
  background: radial-gradient(circle, rgba(79, 209, 224, 0.16) 0%, transparent 70%);
  pointer-events: none;
}

.chip {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--brass-hi);
  border: 1px solid rgba(176, 141, 87, 0.4);
  padding: 5px 10px;
  border-radius: 3px;
  background: rgba(11, 19, 33, 0.6);
  white-space: nowrap;
}
.chip.cyan { color: var(--squall); border-color: rgba(79, 209, 224, 0.4); }
.chip.live { color: var(--ok); border-color: rgba(138, 240, 200, 0.4); }

/* ============================================================
 * Terminal — onboarding form chrome
 * ============================================================ */
.terminal {
  border: 1px solid var(--hairline-strong);
  border-radius: 10px;
  background: rgba(4, 8, 14, 0.85);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--fog);
  background: rgba(11, 19, 33, 0.7);
}
.terminal-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--steel);
}
.terminal-dot.live { background: var(--squall); box-shadow: 0 0 8px rgba(79, 209, 224, 0.6); }
.terminal-body {
  padding: 22px 22px 26px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2.1;
  color: var(--foam);
}
.terminal-body .prompt { color: var(--brass-hi); }
.terminal-body .ok { color: var(--ok); }
.terminal-line { display: flex; align-items: baseline; gap: 10px; }
.terminal-line input {
  flex: 1;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(176, 141, 87, 0.3);
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 4px 2px;
  outline: none;
  transition: border-color 0.25s;
  border-radius: 0;
}
.terminal-line input:focus { border-bottom-color: var(--squall); }
.terminal-line input::placeholder { color: rgba(122, 139, 151, 0.55); }
.term-status { margin-top: 10px; }

/* ============================================================
 * Footer — shared across pages
 * ============================================================ */
.foot {
  padding: 90px clamp(18px, 4vw, 44px) 60px;
  border-top: 1px solid var(--hairline);
  font-size: 12px;
  color: var(--fog);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(32px, 5vw, 70px);
  max-width: 1280px;
  margin: 0 auto;
}
@media (max-width: 800px) { .foot { grid-template-columns: 1fr; gap: 36px; } }
.foot h4 {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--brass-hi);
  letter-spacing: 0.2em;
  margin: 0 0 16px;
}
.foot a {
  color: var(--foam);
  text-decoration: none;
  display: block;
  padding: 5px 0;
  transition: color 0.2s;
}
.foot a:hover { color: var(--squall); }
.foot-bottom {
  border-top: 1px solid rgba(176, 141, 87, 0.08);
  padding: 24px clamp(18px, 4vw, 44px);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fog);
  text-align: center;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

/* Marine-snow footer toggle — same hook names as v1 so the
   persisted preference carries over. */
.marine-snow-toggle {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fog);
  background: rgba(11, 19, 33, 0.6);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  padding: 6px 12px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.marine-snow-toggle:hover { color: var(--foam); border-color: var(--hairline-strong); }
.marine-snow-toggle__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--squall);
  box-shadow: 0 0 8px rgba(79, 209, 224, 0.7);
  transition: background 0.2s, box-shadow 0.2s;
}
.marine-snow-toggle.is-off .marine-snow-toggle__dot {
  background: var(--steel);
  box-shadow: none;
}

/* ============================================================
 * Utilities
 * ============================================================ */
.brass { color: var(--brass-hi); }
.squall { color: var(--squall); }
.mono { font-family: var(--font-mono); letter-spacing: 0.04em; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}