/**
 * Northern Forge · Liquid Glass design system
 * Free assets (CC0) in /assets/brand/ — use on hub + all tools.
 * Glassmorphism, hover lift, liquid specular accents.
 */
:root {
  --nf-bg: #070b14;
  --nf-bg2: #0d1424;
  --nf-card: rgba(18, 26, 46, 0.55);
  --nf-card-solid: #121a2e;
  --nf-line: rgba(94, 184, 255, 0.18);
  --nf-line-strong: rgba(246, 183, 60, 0.35);
  --nf-tx: #e8f1ff;
  --nf-mut: #8aa0c0;
  --nf-dim: #5c7294;
  --nf-gold: #f6b73c;
  --nf-cyan: #5ef0c0;
  --nf-blue: #5eb8ff;
  --nf-glass: rgba(255, 255, 255, 0.06);
  --nf-glass-hi: rgba(255, 255, 255, 0.12);
  --nf-blur: 18px;
  --nf-radius: 16px;
  --nf-shadow: 0 12px 40px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  --nf-glow-gold: 0 0 32px rgba(246, 183, 60, 0.22);
  --nf-glow-cyan: 0 0 28px rgba(94, 240, 192, 0.18);
  --nf-atmosphere: url(/assets/brand/atmosphere.jpg);
  --nf-texture: url(/assets/brand/texture-tile.jpg);
}

/* Full-page liquid glass atmosphere */
body.nf-glass,
.nf-glass-body {
  color: var(--nf-tx);
  background-color: var(--nf-bg);
  background-image:
    linear-gradient(180deg, rgba(7, 11, 20, 0.82), rgba(7, 11, 20, 0.94)),
    var(--nf-atmosphere);
  background-size: cover;
  background-attachment: fixed;
  background-position: center;
  min-height: 100vh;
}

/* Glass card */
.nf-glass-card,
.card.nf-glass,
body.nf-glass .card,
.nf-glass .pillar {
  position: relative;
  background:
    linear-gradient(145deg, var(--nf-glass-hi), var(--nf-glass)),
    rgba(12, 18, 32, 0.55);
  backdrop-filter: blur(var(--nf-blur)) saturate(1.35);
  -webkit-backdrop-filter: blur(var(--nf-blur)) saturate(1.35);
  border: 1px solid var(--nf-line);
  border-radius: var(--nf-radius);
  box-shadow: var(--nf-shadow);
  transition:
    transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.28s ease,
    border-color 0.28s ease,
    background 0.28s ease;
  overflow: hidden;
}

/* Specular liquid edge */
.nf-glass-card::before,
.card.nf-glass::before,
body.nf-glass .card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(
    125deg,
    rgba(255, 255, 255, 0.18) 0%,
    transparent 42%,
    transparent 58%,
    rgba(94, 240, 192, 0.06) 100%
  );
  opacity: 0.85;
}

.nf-glass-card:hover,
.card.nf-glass:hover,
body.nf-glass .card:hover,
.nf-glass .pillar:hover {
  transform: translateY(-4px) scale(1.012);
  border-color: var(--nf-line-strong);
  box-shadow: var(--nf-shadow), var(--nf-glow-gold);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.05)),
    rgba(14, 22, 40, 0.62);
}

/* Glass nav / chrome */
.nf-glass-nav,
body.nf-glass header.nav {
  background: rgba(8, 12, 22, 0.45);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--nf-line);
  border-radius: 14px;
  padding: 0.65rem 0.9rem;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

/* Brand mark */
.nf-glass-mark,
body.nf-glass .mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--nf-line);
  box-shadow: var(--nf-glow-cyan);
  background: rgba(0, 0, 0, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.nf-glass-mark img,
body.nf-glass .brand img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.nf-glass-mark:hover,
body.nf-glass .brand:hover .mark {
  transform: rotate(-3deg) scale(1.06);
  box-shadow: var(--nf-glow-gold);
}

/* Buttons — liquid glass */
.nf-btn-glass,
body.nf-glass .btn-ghost,
body.nf-glass .link-btn:not(.gold) {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--nf-line);
  color: var(--nf-tx);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}
.nf-btn-glass:hover,
body.nf-glass .btn-ghost:hover,
body.nf-glass .link-btn:not(.gold):hover {
  transform: translateY(-2px);
  border-color: var(--nf-cyan);
  box-shadow: var(--nf-glow-cyan);
  background: rgba(94, 240, 192, 0.08);
  text-decoration: none !important;
}

body.nf-glass .btn-primary,
body.nf-glass .link-btn.gold {
  background: linear-gradient(135deg, #f6b73c, #e08a1e);
  color: #1a1205;
  border: 1px solid transparent;
  box-shadow: 0 6px 20px rgba(246, 183, 60, 0.28);
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease;
}
body.nf-glass .btn-primary:hover,
body.nf-glass .link-btn.gold:hover {
  transform: translateY(-2px) scale(1.02);
  filter: brightness(1.07);
  box-shadow: 0 10px 28px rgba(246, 183, 60, 0.4);
  text-decoration: none !important;
}

/* Hero glass plate */
.nf-glass-hero,
body.nf-glass .hero {
  position: relative;
  padding: 2rem 1.4rem;
  border-radius: 20px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.02)),
    rgba(10, 16, 30, 0.4);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid var(--nf-line);
  box-shadow: var(--nf-shadow), var(--nf-glow-cyan);
  overflow: hidden;
}
.nf-glass-hero::after,
body.nf-glass .hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -15%;
  width: 55%;
  height: 140%;
  background: radial-gradient(
    circle,
    rgba(246, 183, 60, 0.12),
    transparent 65%
  );
  pointer-events: none;
}

/* Hot pills / chips */
body.nf-glass .chip,
body.nf-glass .hot-pill,
.nf-glass-chip {
  background: rgba(255, 255, 255, 0.08) !important;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--nf-line) !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
body.nf-glass .hot-pill:hover,
.nf-glass-chip:hover {
  transform: translateY(-2px);
  box-shadow: var(--nf-glow-gold);
}

body.nf-glass .chip.hot {
  background: linear-gradient(135deg, #f6b73c, #e08a1e) !important;
  color: #1a1205 !important;
  border-color: transparent !important;
  box-shadow: 0 4px 16px rgba(246, 183, 60, 0.35);
}
body.nf-glass .chip.new {
  background: linear-gradient(135deg, #5ef0c0, #3dd6c6) !important;
  color: #0a1410 !important;
  border-color: transparent !important;
  font-weight: 700;
}
body.nf-glass .product-card .card-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.45rem 0.75rem;
  margin-top: 0.55rem;
}
body.nf-glass .product-card .impressions {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  font-size: 0.78rem;
  font-weight: 650;
  color: var(--mut, #8aa0c0);
  letter-spacing: 0.01em;
}
body.nf-glass .product-card .impressions .imp-n {
  color: var(--cyan, #5ef0c0);
  font-variant-numeric: tabular-nums;
}
body.nf-glass .product-card .impressions .imp-label {
  opacity: 0.85;
  font-weight: 500;
}
body.nf-glass .product-card.list .impressions {
  margin-bottom: 0.35rem;
}

/* Inputs / tools */
body.nf-glass input,
body.nf-glass textarea,
body.nf-glass select,
.nf-glass-input {
  background: rgba(0, 0, 0, 0.28) !important;
  border: 1px solid var(--nf-line) !important;
  border-radius: 12px !important;
  color: var(--nf-tx) !important;
  backdrop-filter: blur(8px);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
body.nf-glass input:focus,
body.nf-glass textarea:focus,
body.nf-glass select:focus {
  outline: none;
  border-color: var(--nf-cyan) !important;
  box-shadow: 0 0 0 3px rgba(94, 240, 192, 0.15);
}

/* Marketing banner strip */
.nf-glass-banner {
  display: block;
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--nf-line);
  box-shadow: var(--nf-shadow);
  margin: 0 0 1.25rem;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  background: linear-gradient(135deg, rgba(26, 40, 70, 0.9), rgba(10, 16, 30, 0.95));
}
.nf-glass-banner:hover {
  transform: scale(1.01);
  box-shadow: var(--nf-shadow), var(--nf-glow-gold);
}
/* Hide broken brand images instead of showing alt/broken icon */
img.nf-glass-banner:not([src]),
img.nf-brand-broken {
  display: none !important;
}
body.nf-glass .brand img {
  background: rgba(255, 255, 255, 0.06);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .nf-glass-card,
  .card.nf-glass,
  body.nf-glass .card,
  body.nf-glass .btn-primary,
  body.nf-glass .link-btn,
  .nf-glass-banner {
    transition: none !important;
  }
  .nf-glass-card:hover,
  body.nf-glass .card:hover {
    transform: none;
  }
}

/* ═══════════════════════════════════════════════════════════
   Northern Forge · Fluid SOTA layout system (v3)
   Dynamic type · fluid space · auto grids · container queries
   ═══════════════════════════════════════════════════════════ */

:root {
  /* Fluid type scale */
  --nf-fs-xs: clamp(0.72rem, 0.68rem + 0.2vw, 0.8rem);
  --nf-fs-sm: clamp(0.84rem, 0.78rem + 0.28vw, 0.95rem);
  --nf-fs-md: clamp(0.95rem, 0.9rem + 0.35vw, 1.05rem);
  --nf-fs-lg: clamp(1.15rem, 1rem + 0.7vw, 1.4rem);
  --nf-fs-xl: clamp(1.45rem, 1.15rem + 1.2vw, 2rem);
  --nf-fs-2xl: clamp(1.85rem, 1.35rem + 2vw, 2.85rem);
  --nf-fs-3xl: clamp(2.2rem, 1.5rem + 2.8vw, 3.4rem);

  /* Fluid space */
  --nf-space-1: clamp(0.25rem, 0.2rem + 0.2vw, 0.4rem);
  --nf-space-2: clamp(0.5rem, 0.4rem + 0.35vw, 0.75rem);
  --nf-space-3: clamp(0.75rem, 0.6rem + 0.5vw, 1.1rem);
  --nf-space-4: clamp(1rem, 0.8rem + 0.7vw, 1.5rem);
  --nf-space-5: clamp(1.35rem, 1rem + 1.1vw, 2.25rem);
  --nf-space-6: clamp(1.75rem, 1.25rem + 1.6vw, 3rem);
  --nf-space-7: clamp(2.25rem, 1.5rem + 2.2vw, 4rem);

  /* Layout */
  --nf-measure: 68ch;
  --nf-content: min(1120px, calc(100% - 2 * var(--nf-gutter)));
  --nf-gutter: clamp(1rem, 3vw, 1.75rem);
  --nf-gap: clamp(0.75rem, 1.5vw, 1.25rem);
  --nf-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nf-dur: 0.35s;
  --nf-safe-b: env(safe-area-inset-bottom, 0px);
  --nf-safe-t: env(safe-area-inset-top, 0px);

  /* Alias legacy tokens used in tools */
  --bg: var(--nf-bg);
  --card: var(--nf-card-solid);
  --line: #24314d;
  --tx: var(--nf-tx);
  --mut: var(--nf-mut);
  --dim: var(--nf-dim);
  --gold: var(--nf-gold);
  --cyan: var(--nf-cyan);
  --ok: var(--nf-cyan);
  --accent: var(--nf-gold);
  --accent2: var(--nf-cyan);
}

/* Base fluid body */
body.nf-glass,
.nf-glass-body,
body[data-nf-fluid] {
  font-size: var(--nf-fs-md);
  line-height: 1.55;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  padding-bottom: var(--nf-safe-b);
}

/* Fluid content shell */
.nf-shell,
body.nf-glass .wrap,
body.nf-glass main {
  width: var(--nf-content);
  max-width: 100%;
  margin-inline: auto;
  padding-inline: var(--nf-gutter);
  padding-block: var(--nf-space-4) calc(var(--nf-space-7) + var(--nf-safe-b));
}

body.nf-glass main {
  max-width: min(760px, 100%);
}

body.nf-glass .wrap {
  max-width: min(1120px, 100%);
}

/* Fluid type hierarchy */
body.nf-glass h1,
.nf-fluid-h1 {
  font-size: var(--nf-fs-2xl);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 750;
  margin: 0 0 var(--nf-space-3);
  text-wrap: balance;
}

body.nf-glass h2,
.nf-fluid-h2 {
  font-size: var(--nf-fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nf-dim);
  font-weight: 650;
  margin: 0 0 var(--nf-space-3);
}

body.nf-glass h3 {
  font-size: var(--nf-fs-lg);
  line-height: 1.25;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

body.nf-glass .sub,
body.nf-glass .lede,
body.nf-glass p.sub {
  font-size: var(--nf-fs-md);
  color: var(--nf-mut);
  max-width: var(--nf-measure);
  text-wrap: pretty;
}

/* Layout primitives */
.nf-stack {
  display: flex;
  flex-direction: column;
  gap: var(--nf-gap);
}
.nf-stack-sm { gap: var(--nf-space-2); }
.nf-stack-lg { gap: var(--nf-space-5); }

.nf-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--nf-space-2) var(--nf-space-3);
  align-items: center;
}

.nf-split {
  display: grid;
  gap: var(--nf-gap);
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .nf-split { grid-template-columns: 1.15fr 0.85fr; align-items: start; }
  .nf-split.equal { grid-template-columns: 1fr 1fr; }
}

/* Fluid auto grid — the workhorse */
.nf-auto-grid,
body.nf-glass .grid,
body.nf-glass .product-grid:not(.list-view),
body.nf-glass .pillars {
  display: grid;
  gap: var(--nf-gap);
  grid-template-columns: repeat(
    auto-fit,
    minmax(min(100%, var(--nf-card-min, 260px)), 1fr)
  );
}

body.nf-glass .pillars {
  --nf-card-min: 200px;
}

/* Bento */
.nf-bento {
  display: grid;
  gap: var(--nf-gap);
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(120px, auto);
}
.nf-bento > * { grid-column: span 12; }
@media (min-width: 640px) {
  .nf-bento > .span-6 { grid-column: span 6; }
  .nf-bento > .span-4 { grid-column: span 4; }
  .nf-bento > .span-8 { grid-column: span 8; }
  .nf-bento > .span-3 { grid-column: span 3; }
}

/* Responsive pair rows without media spam */
body.nf-glass .row {
  display: grid;
  gap: var(--nf-space-3);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}

/* Sticky fluid chrome */
.nf-sticky-bar,
body.nf-glass .explorer-shell .command-bar {
  position: sticky;
  top: max(0.5rem, var(--nf-safe-t));
  z-index: 20;
  backdrop-filter: blur(16px) saturate(1.25);
  -webkit-backdrop-filter: blur(16px) saturate(1.25);
}

/* Tool page: glass main plate */
body.nf-glass main > .card,
body.nf-glass main .card {
  padding: var(--nf-space-4);
}

body.nf-glass .hubbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--nf-space-2) var(--nf-space-3);
  font-size: var(--nf-fs-sm);
  margin-bottom: var(--nf-space-4);
  padding: var(--nf-space-2) var(--nf-space-3);
  border-radius: 999px;
  background: rgba(8, 12, 22, 0.4);
  border: 1px solid var(--nf-line);
  backdrop-filter: blur(12px);
  width: fit-content;
  max-width: 100%;
}

body.nf-glass .badge {
  font-size: var(--nf-fs-xs);
}

/* Benefits as fluid grid */
body.nf-glass .nf-benefits {
  display: grid;
  gap: var(--nf-space-2);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr));
  margin: 0 0 var(--nf-space-4);
}

body.nf-glass .nf-benefits .b {
  border: 1px solid var(--nf-line);
  border-radius: 14px;
  padding: var(--nf-space-3);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
  transition: transform var(--nf-dur) var(--nf-ease), border-color var(--nf-dur) ease;
}
body.nf-glass .nf-benefits .b:hover {
  transform: translateY(-2px);
  border-color: rgba(94, 240, 192, 0.35);
}

/* Full-bleed sections on hub */
body.nf-glass .section {
  margin-block: var(--nf-space-6);
}

/* Dynamic product cards in explorer */
body.nf-glass .product-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  container-type: inline-size;
}
body.nf-glass .product-card .actions {
  margin-top: auto;
  padding-top: var(--nf-space-3);
}
body.nf-glass .product-card h3 {
  font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.2rem);
}

/* List view fluid */
body.nf-glass .product-grid.list-view {
  display: flex;
  flex-direction: column;
  gap: var(--nf-space-3);
}
body.nf-glass .product-card.list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--nf-space-3);
}
@container (min-width: 520px) {
  body.nf-glass .product-card.list {
    grid-template-columns: 1.4fr 0.7fr;
    align-items: center;
  }
}
@media (min-width: 720px) {
  body.nf-glass .product-card.list {
    grid-template-columns: 1.4fr 0.7fr;
    align-items: center;
  }
}

/* Explorer shell more liquid */
body.nf-glass .explorer-shell {
  padding: var(--nf-space-4);
  border-radius: clamp(16px, 2vw, 24px);
}

body.nf-glass .command-bar {
  display: grid;
  gap: var(--nf-space-2);
  grid-template-columns: 1fr;
  margin-bottom: var(--nf-space-3);
  padding: var(--nf-space-2);
  border-radius: 16px;
  border: 1px solid var(--nf-line);
  background: rgba(7, 11, 20, 0.55);
}
@media (min-width: 800px) {
  body.nf-glass .command-bar {
    grid-template-columns: minmax(0, 1fr) auto auto auto;
  }
}

body.nf-glass .search-wrap input {
  min-height: 48px;
  font-size: var(--nf-fs-md);
}

/* Buttons touch-friendly fluid */
body.nf-glass button,
body.nf-glass .btn,
body.nf-glass .link-btn,
body.nf-glass button.run,
body.nf-glass button.cta {
  min-height: 44px;
  border-radius: 12px;
  font-size: var(--nf-fs-sm);
}

body.nf-glass button.run,
body.nf-glass button.cta,
body.nf-glass .cta {
  width: 100%;
  margin-top: var(--nf-space-3);
}

/* Output panels */
body.nf-glass .out {
  margin-top: var(--nf-space-3);
  padding: var(--nf-space-3);
  border-radius: 14px;
  font-size: var(--nf-fs-sm);
  line-height: 1.5;
  max-height: min(50vh, 420px);
  overflow: auto;
}

/* Reveal motion (progressive) */
.nf-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.55s var(--nf-ease),
    transform 0.55s var(--nf-ease);
}
.nf-reveal.is-in {
  opacity: 1;
  transform: none;
}

/* Focus-visible a11y */
body.nf-glass :focus-visible {
  outline: 2px solid var(--nf-cyan);
  outline-offset: 3px;
}

/* Dark scrollbars */
body.nf-glass {
  scrollbar-color: rgba(94, 240, 192, 0.35) transparent;
}
body.nf-glass ::-webkit-scrollbar { width: 10px; height: 10px; }
body.nf-glass ::-webkit-scrollbar-thumb {
  background: rgba(94, 240, 192, 0.28);
  border-radius: 999px;
}

/* Print */
@media print {
  body.nf-glass {
    background: #fff !important;
    color: #000 !important;
  }
  body.nf-glass .card {
    box-shadow: none !important;
    backdrop-filter: none !important;
  }
}

/* Ultra-wide comfort */
@media (min-width: 1400px) {
  :root {
    --nf-content: min(1200px, calc(100% - 2 * var(--nf-gutter)));
  }
}

/* Small phones */
@media (max-width: 380px) {
  body.nf-glass .hubbar { border-radius: 14px; }
  body.nf-glass h1 { letter-spacing: -0.02em; }
}

@media (prefers-reduced-motion: reduce) {
  .nf-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  body.nf-glass .explorer-shell::before {
    animation: none !important;
  }
}