/* ==========================================================================
   Wiseforge — design system
   Charcoal iron + copper ember. Instrument Serif display, Hanken Grotesk body.
   Product pages override the accent layer via body[data-theme].
   ========================================================================== */

:root {
  /* Surfaces */
  --bg: #0d0e10;
  --bg-raised: #141517;
  --bg-card: #17181b;
  --line: rgba(235, 228, 218, 0.09);
  --line-strong: rgba(235, 228, 218, 0.16);

  /* Type */
  --ink: #ece7df;
  --ink-soft: #b3aca0;
  --ink-faint: #7d776c;

  /* Accent — copper ember */
  --accent: #c98a5e;
  --accent-bright: #e0a87b;
  --accent-deep: #9c6038;
  --accent-glow: rgba(201, 138, 94, 0.16);
  --accent-grad: linear-gradient(135deg, #e0a87b 0%, #c98a5e 45%, #9c6038 100%);

  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Hanken Grotesk", -apple-system, "Segoe UI", sans-serif;

  --radius: 18px;
  --radius-sm: 12px;
  --container: 1140px;
  --nav-h: 76px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Light editorial theme base (Lingue, Nido pages re-tint this) */
body[data-theme="paper"] {
  --bg: #f1e9da;
  --bg-raised: #f7f1e5;
  --bg-card: #fcfaf3;
  --line: rgba(42, 38, 32, 0.12);
  --line-strong: rgba(42, 38, 32, 0.22);
  --ink: #2a2620;
  --ink-soft: #6e6657;
  --ink-faint: #978e7b;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

::selection { background: var(--accent); color: #0d0e10; }
body[data-theme="paper"] ::selection { color: #fff; }

/* ---- Grain overlay ---- */
.grain {
  position: fixed; inset: -50%;
  width: 200%; height: 200%;
  pointer-events: none;
  z-index: 2000;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-shift 9s steps(6) infinite;
}
@keyframes grain-shift {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -3%); }
  60% { transform: translate(-2%, -2%); }
  80% { transform: translate(3%, 3%); }
}

/* ---- Layout ---- */
.container {
  width: min(var(--container), 100% - 3rem);
  margin-inline: auto;
}

/* ---- Navigation ---- */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.site-nav .container {
  display: flex; align-items: center; justify-content: space-between;
}
.wordmark {
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: 0.01em;
  display: flex; align-items: baseline; gap: 0.45rem;
}
.wordmark .spark {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent-grad);
  align-self: center;
  box-shadow: 0 0 12px var(--accent);
}
.nav-links {
  display: flex; gap: 2.2rem;
  list-style: none; padding: 0;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.nav-links a {
  color: var(--ink-soft);
  transition: color 0.25s;
  position: relative;
  padding: 0.3rem 0;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links a::after {
  content: ""; position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease-out);
}
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}
.nav-toggle {
  display: none;
  background: none; border: 0;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute; left: 8px; right: 8px;
  height: 1.5px; background: var(--ink);
  transition: transform 0.3s var(--ease-out), opacity 0.2s, top 0.3s var(--ease-out);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-open .nav-toggle span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* ---- Typography ---- */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.01em;
}
.display em {
  font-style: italic;
  color: var(--accent-bright);
}
body[data-theme="paper"] .display em { color: var(--accent); }

.eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex; align-items: center; gap: 0.8rem;
}
.eyebrow::before {
  content: "";
  width: 2rem; height: 1px;
  background: var(--accent);
  opacity: 0.6;
}
.lede {
  color: var(--ink-soft);
  font-size: 1.18rem;
  line-height: 1.7;
  max-width: 38em;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.85rem 1.7rem;
  border-radius: 999px;
  font-size: 0.95rem; font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s, background 0.3s, border-color 0.3s, color 0.3s;
}
.btn-primary {
  background: var(--accent-grad);
  color: #16100b;
  box-shadow: 0 4px 24px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow), 0 2px 8px rgba(0,0,0,0.3);
}
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
  transform: translateY(-2px);
}
body[data-theme="paper"] .btn-primary { color: #fff; box-shadow: 0 4px 20px var(--accent-glow); }
body[data-theme="paper"] .btn-ghost:hover { color: var(--accent); }

/* Store buttons (App Store / direct download) */
.store-btn {
  display: inline-flex; align-items: center; gap: 0.7rem;
  padding: 0.7rem 1.4rem 0.7rem 1.1rem;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: var(--bg-card);
  transition: transform 0.3s var(--ease-out), border-color 0.3s, box-shadow 0.3s;
  text-align: left;
}
.store-btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
}
body[data-theme="paper"] .store-btn:hover { box-shadow: 0 8px 24px rgba(42, 38, 32, 0.12); }
.store-btn svg { width: 26px; height: 26px; flex: none; }
.store-btn .store-meta { display: flex; flex-direction: column; line-height: 1.25; }
.store-btn .store-meta small {
  font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-faint);
}
.store-btn .store-meta strong { font-size: 1rem; font-weight: 600; }
.store-btn.is-soon {
  pointer-events: none;
  opacity: 0.55;
  border-style: dashed;
}
.soon-note {
  font-size: 0.8rem;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}

/* ---- Status badges ---- */
.badge {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
}
.badge::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ink-faint);
}
.badge.live { border-color: color-mix(in srgb, #4fa97c 50%, transparent); color: #6fc096; }
.badge.live::before { background: #4fa97c; box-shadow: 0 0 8px #4fa97c; }
.badge.soon { border-color: color-mix(in srgb, var(--accent) 50%, transparent); color: var(--accent-bright); }
.badge.soon::before { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
body[data-theme="paper"] .badge.live { color: #357a55; }
body[data-theme="paper"] .badge.soon { color: var(--accent); }

/* ---- Sections ---- */
.section { padding: 7rem 0; position: relative; }
.section-head { margin-bottom: 3.5rem; display: flex; flex-direction: column; gap: 1.1rem; }
.section-head .display { font-size: clamp(2.2rem, 4.5vw, 3.4rem); }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 4rem 0 2.5rem;
  position: relative;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}
.footer-brand p {
  color: var(--ink-faint);
  font-size: 0.92rem;
  max-width: 24em;
  margin-top: 0.8rem;
}
.footer-col h4 {
  font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.1rem;
}
.footer-col ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a {
  color: var(--ink-soft);
  font-size: 0.95rem;
  transition: color 0.25s;
}
.footer-col a:hover { color: var(--accent-bright); }
body[data-theme="paper"] .footer-col a:hover { color: var(--accent); }
.footer-base {
  border-top: 1px solid var(--line);
  padding-top: 1.8rem;
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; flex-wrap: wrap;
  color: var(--ink-faint);
  font-size: 0.85rem;
}

/* ---- Reveal animations ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  transition-delay: var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .grain { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---- App icon treatment ---- */
.app-icon {
  border-radius: 22.5%;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.08) inset,
    0 18px 44px rgba(0, 0, 0, 0.45);
}
body[data-theme="paper"] .app-icon {
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.45) inset,
    0 16px 36px rgba(42, 38, 32, 0.22);
}

/* ---- Product page scaffolding ---- */
.product-hero {
  padding: calc(var(--nav-h) + 5.5rem) 0 5.5rem;
  position: relative;
  overflow: hidden;
}
.product-hero .container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
  position: relative;
}
.product-hero-copy { display: flex; flex-direction: column; gap: 1.5rem; align-items: flex-start; }
.product-hero-copy .display { font-size: clamp(2.6rem, 5.5vw, 4.2rem); }
.product-hero-art { display: flex; justify-content: center; position: relative; }
.product-hero-art .app-icon { width: min(280px, 60vw); }
.platform-row { display: flex; gap: 0.9rem; flex-wrap: wrap; align-items: center; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.9rem 1.7rem;
  display: flex; flex-direction: column; gap: 0.8rem;
  transition: transform 0.35s var(--ease-out), border-color 0.35s, box-shadow 0.35s;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}
body[data-theme="paper"] .feature-card:hover { box-shadow: 0 14px 32px rgba(42, 38, 32, 0.12); }
.feature-card .glyph {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: var(--accent-glow);
  color: var(--accent);
}
.feature-card .glyph svg { width: 22px; height: 22px; }
.feature-card h3 { font-size: 1.12rem; font-weight: 650; letter-spacing: -0.01em; }
.feature-card p { color: var(--ink-soft); font-size: 0.95rem; line-height: 1.6; }

/* ---- Breadcrumb back link ---- */
.crumb {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.85rem; font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  transition: color 0.25s;
}
.crumb:hover { color: var(--accent-bright); }
body[data-theme="paper"] .crumb:hover { color: var(--accent); }

/* ---- Legal pages ---- */
.legal-wrap {
  max-width: 760px;
  margin-inline: auto;
  padding: calc(var(--nav-h) + 4rem) 1.5rem 6rem;
}
.legal-wrap h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: 1.1;
  margin-bottom: 0.6rem;
}
.legal-meta {
  color: var(--ink-faint);
  font-size: 0.9rem;
  margin-bottom: 3rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--line);
}
.legal-wrap h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.7rem;
  margin: 2.8rem 0 0.9rem;
  color: var(--ink);
}
.legal-wrap h3 {
  font-size: 1.05rem;
  font-weight: 650;
  margin: 1.9rem 0 0.6rem;
}
.legal-wrap p, .legal-wrap li { color: var(--ink-soft); font-size: 0.98rem; }
.legal-wrap ul { padding-left: 1.3rem; display: flex; flex-direction: column; gap: 0.4rem; margin: 0.6rem 0 1rem; }
.legal-wrap a { color: var(--accent-bright); }
.legal-wrap a:hover { text-decoration: underline; }
body[data-theme="paper"] .legal-wrap a { color: var(--accent); }
.legal-wrap strong { color: var(--ink); }

/* ---- Responsive ---- */
@media (max-width: 920px) {
  .product-hero .container { grid-template-columns: 1fr; gap: 3rem; }
  .product-hero-art { order: -1; }
  .product-hero-art .app-icon { width: min(190px, 50vw); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 4.5rem 0; }
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 0.6rem 1.5rem 1.2rem;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease-out), opacity 0.3s;
  }
  .nav-open .nav-links {
    transform: none; opacity: 1; pointer-events: auto;
  }
  .nav-links li { border-bottom: 1px solid var(--line); }
  .nav-links li:last-child { border-bottom: 0; }
  .nav-links a { display: block; padding: 0.9rem 0; }
  .nav-links a::after { display: none; }
  .nav-toggle { display: block; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}