/* ==========================================================================
   Forgeline — Traditional Product Landing Page in Ink Compact Palette
   ========================================================================== */

@font-face {
  font-family: "Geist";
  src: url("./fonts/geist_regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist";
  src: url("./fonts/geist_semibold.ttf") format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ==========================================================================
   Palette Tokens (Light & Dark)
   ========================================================================== */
:root,
[data-theme="light"] {
  --ground: #F5F4F6;
  --surface-alt: #ECEBEF;
  --raised: #FFFFFF;
  --ink: #16181A;
  --ink-muted: #606065;
  --ink-accent: var(--ink);
  --accent: #8F5600;
  --thumb: #F5A524;
  --on-thumb: #16181A;
  --surface: #E8E7EB;
  --hairline: #DCDADF;
  --accent-soft: #FCE9C0;

  /* Dark Hero & Header Band */
  --band: #16181A;
  --band-ink: #EDEDF0;
  --band-muted: #A6A5AB;
  --band-surface: #232429;
  --band-hairline: #2E2F36;
  --band-amber: #FFC062;

  /* Typography */
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Radii */
  --r-xs: 4px;
  --r-tag: 6px;
  --r-control: 8px;
  --r-tile: 10px;
  --r-panel: 14px;
  --r-device: 28px;

  --spring: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: light;
}

[data-theme="dark"] {
  --ground: #111113;
  --surface-alt: #16161A;
  --raised: #1B1B20;
  --ink: #EDEDF0;
  --ink-muted: #9C9BA3;
  --ink-accent: #FFAB00;
  --accent: #FFC062;
  --thumb: #F5A524;
  --on-thumb: #16181A;
  --surface: #232329;
  --hairline: #2A2A32;
  --accent-soft: #3A2C12;
  --band: #16161A;
  --band-ink: #EDEDF0;
  --band-muted: #A6A5AB;
  --band-surface: #24242B;
  --band-hairline: #303038;
  --band-amber: #FFC062;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--accent-soft);
  color: var(--ink);
}

html {
  font-family: var(--font-sans);
  font-weight: 400;
  background-color: var(--ground);
  color: var(--ink);
  caret-color: var(--accent);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scrollbar-color: var(--ink-muted) var(--surface);
}

body {
  min-height: 100vh;
  background-color: var(--ground);
  color: var(--ink);
  font-size: 16px;
  line-height: 25px;
  overflow-x: hidden;
  transition: background-color 180ms ease, color 180ms ease;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--thumb);
  outline-offset: 2px;
}

.tnum {
  font-variant-numeric: tabular-nums;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 10px;
  z-index: 200;
  background: var(--thumb);
  color: var(--on-thumb);
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--r-control);
  text-decoration: none;
}

.skip-link:focus {
  left: 16px;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ==========================================================================
   Sticky Top Navigation Bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(22, 24, 26, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--band-hairline);
  color: var(--band-ink);
}

.nav-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--band-ink);
}

.brand-tile {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background-color: var(--band-surface);
  border: 1px solid var(--band-hairline);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-name {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--band-ink);
}

.version-pill {
  font-size: 11.5px;
  line-height: 16px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--r-xs);
  background-color: var(--band-surface);
  color: var(--band-muted);
  border: 1px solid var(--band-hairline);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 100%;
}

.nav-link {
  position: relative;
  height: 64px;
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 400;
  color: var(--band-muted);
  text-decoration: none;
  transition: color 140ms ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background-color: var(--thumb);
  transform: scaleX(0);
  transition: transform 160ms var(--spring);
}

.nav-link:hover {
  color: var(--band-ink);
}

.nav-link.is-active {
  color: var(--band-ink);
  font-weight: 600;
}

.nav-link.is-active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 11px;
  border-radius: var(--r-control);
  background-color: var(--band-surface);
  color: var(--band-ink);
  border: 1px solid var(--band-hairline);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 140ms ease, background-color 140ms ease;
}

.theme-toggle-btn:hover {
  border-color: #464752;
  background-color: #2A2B32;
}

.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 11px;
  border-radius: var(--r-control);
  background-color: var(--band-surface);
  border: 1px solid var(--band-hairline);
  color: var(--band-ink);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.nav-github:hover {
  border-color: #464752;
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 13px;
  border-radius: var(--r-control);
  background-color: var(--thumb);
  color: var(--on-thumb);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: filter 140ms ease;
}

.btn-nav-cta:hover {
  filter: brightness(1.06);
}

/* ==========================================================================
   Hero Section (Two-Column Traditional Layout)
   ========================================================================== */
.hero-band {
  background-color: var(--band);
  color: var(--band-ink);
  padding: 64px 0 76px;
  border-bottom: 1px solid var(--band-hairline);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: 56px;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 22px;
}

.hero-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.badge-amber {
  font-size: 12px;
  line-height: 16px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: var(--r-tag);
  background-color: rgba(245, 165, 36, 0.16);
  color: var(--band-amber);
}

.badge-outline {
  font-size: 12px;
  line-height: 16px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: var(--r-tag);
  background-color: var(--band-surface);
  color: var(--band-ink);
  border: 1px solid var(--band-hairline);
}

.hero-title {
  font-size: 46px;
  line-height: 54px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--band-ink);
}

.hero-lead {
  font-size: 18px;
  line-height: 28px;
  color: var(--band-muted);
  max-width: 58ch;
}

.hero-lead strong {
  color: var(--band-ink);
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 4px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 46px;
  padding: 0 20px;
  border-radius: var(--r-control);
  background-color: var(--thumb);
  color: var(--on-thumb);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 140ms var(--spring), filter 140ms ease;
}

.btn-primary:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 46px;
  padding: 0 18px;
  border-radius: var(--r-control);
  background-color: var(--band-surface);
  color: var(--band-ink);
  border: 1px solid var(--band-hairline);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 140ms ease, border-color 140ms ease;
}

.btn-secondary:hover {
  background-color: #2E2F37;
  border-color: #464854;
}

.hero-highlights {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 6px;
  font-size: 13.5px;
  color: var(--band-muted);
}

.hero-highlights li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

/* ==========================================================================
   Realistic Android Phone Hardware Frame (Crops bottom test whitespace cleanly)
   ========================================================================== */
.device-frame {
  background-color: #1E1F24;
  border: 2px solid #353740;
  border-radius: var(--r-device);
  padding: 10px;
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.28);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

.device-statusbar {
  height: 22px;
  padding: 0 14px;
  background-color: #16181A;
  color: #EDEDF0;
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 18px 18px 0 0;
}

.device-camera {
  width: 8px;
  height: 8px;
  border-radius: 4px;
  background-color: #0B0B0D;
  border: 1px solid #2E2F36;
}

.device-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 20;
  overflow: hidden;
  border-radius: 0 0 18px 18px;
  background-color: #16181A;
}

.device-viewport img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

/* Hero Overlapping Dual Phone Showcase */
.hero-stage {
  display: flex;
  justify-content: center;
}

.phone-duo {
  position: relative;
  width: 100%;
  max-width: 440px;
  height: 610px;
}

.device-front {
  position: absolute;
  left: 0;
  top: 20px;
  width: 262px;
  z-index: 2;
}

.device-back {
  position: absolute;
  right: 0;
  top: 0;
  width: 248px;
  z-index: 1;
  opacity: 0.94;
}

/* ==========================================================================
   Section Scaffolding & Headers
   ========================================================================== */
.section-block {
  padding: 84px 0;
  border-bottom: 1px solid var(--hairline);
}

.section-surface {
  background-color: var(--surface-alt);
}

.section-header-centered {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.section-title {
  font-size: 34px;
  line-height: 42px;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.section-subtitle {
  font-size: 17px;
  line-height: 26px;
  color: var(--ink-muted);
}

/* ==========================================================================
   Section 1: 4-Column Supported Forges Grid
   ========================================================================== */
.forge-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.forge-item {
  background-color: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-panel);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.forge-item-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.forge-icon-tile {
  width: 42px;
  height: 42px;
  border-radius: var(--r-tile);
  background-color: var(--surface);
  color: var(--ink-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.forge-item-title {
  font-size: 18px;
  line-height: 23px;
  font-weight: 600;
  color: var(--ink);
}

.forge-item-domain {
  font-size: 13px;
  line-height: 18px;
  color: var(--ink-muted);
}

.forge-item-body {
  font-size: 14.5px;
  line-height: 22px;
  color: var(--ink-muted);
  flex: 1;
}

/* ==========================================================================
   Section 2: Alternating Two-Column Feature Spotlights
   ========================================================================== */
.spotlight-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 64px;
  align-items: center;
}

.spotlight-reverse {
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}

.spotlight-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.spotlight-title {
  font-size: 32px;
  line-height: 40px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.spotlight-lead {
  font-size: 16.5px;
  line-height: 26px;
  color: var(--ink-muted);
}

.feature-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 4px;
}

.feature-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  line-height: 23px;
  color: var(--ink-muted);
}

.feature-points strong {
  color: var(--ink);
  font-weight: 600;
}

.point-marker {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background-color: var(--accent-soft);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

/* Spotlight Phone Stage */
.spotlight-visual {
  display: flex;
  justify-content: center;
}

.visual-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.stage-pills {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border-radius: var(--r-control);
  background-color: var(--raised);
  border: 1px solid var(--hairline);
  flex-wrap: wrap;
  justify-content: center;
}

.stage-pill {
  height: 32px;
  padding: 0 11px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-muted);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 400;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease;
}

.stage-pill:hover {
  color: var(--ink);
}

.stage-pill[aria-pressed="true"] {
  background-color: var(--band);
  color: var(--band-ink);
  font-weight: 600;
}

.device-single {
  width: 274px;
}

.stage-caption {
  font-size: 13px;
  line-height: 18px;
  font-weight: 600;
  color: var(--ink-muted);
  text-align: center;
}

/* ==========================================================================
   Section 3: Interactive 3-Phone Theme Gallery
   ========================================================================== */
.gallery-mode-bar {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border-radius: var(--r-tile);
  background-color: var(--raised);
  border: 1px solid var(--hairline);
  margin-top: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.gallery-mode-btn {
  height: 36px;
  padding: 0 14px;
  border: none;
  border-radius: var(--r-control);
  background: transparent;
  color: var(--ink-muted);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 400;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease;
}

.gallery-mode-btn:hover {
  color: var(--ink);
}

.gallery-mode-btn[aria-pressed="true"] {
  background-color: var(--band);
  color: var(--band-ink);
  font-weight: 600;
}

.three-phone-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  justify-items: center;
}

.gallery-phone-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: 286px;
}

.device-gallery {
  width: 100%;
}

.gallery-caption {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  text-align: center;
}

/* ==========================================================================
   Section 4: 3-Column Speed, Privacy & Architecture Grid
   ========================================================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.pillar-item {
  background-color: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-panel);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-tile);
  background-color: var(--accent-soft);
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.pillar-title {
  font-size: 18px;
  line-height: 24px;
  font-weight: 600;
  color: var(--ink);
}

.pillar-desc {
  font-size: 15px;
  line-height: 23px;
  color: var(--ink-muted);
}

/* ==========================================================================
   Bottom CTA Banner & Footer
   ========================================================================== */
.cta-banner {
  background-color: var(--band);
  color: var(--band-ink);
  padding: 64px 0;
  border-top: 1px solid var(--band-hairline);
}

.cta-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-banner-copy {
  max-width: 600px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cta-banner-title {
  font-size: 32px;
  line-height: 40px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--band-ink);
}

.cta-banner-sub {
  font-size: 16px;
  line-height: 25px;
  color: var(--band-muted);
}

.cta-banner-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-band {
  background-color: #111214;
  color: var(--band-muted);
  border-top: 1px solid var(--band-hairline);
  padding: 32px 0;
  font-size: 13.5px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.footer-brand strong {
  color: var(--band-ink);
  font-weight: 600;
}

.footer-brand a {
  color: var(--band-amber);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-disclosure {
  font-size: 12.5px;
  line-height: 18px;
  color: var(--band-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--band-ink);
  font-weight: 600;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Responsive Breakpoints & Reduced Motion
   ========================================================================== */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }

  .hero-grid,
  .spotlight-grid,
  .spotlight-reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 44px;
  }

  .spotlight-reverse .spotlight-visual {
    order: 2;
  }

  .spotlight-reverse .spotlight-copy {
    order: 1;
  }

  .forge-cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .three-phone-grid,
  .pillars-grid {
    grid-template-columns: minmax(0, 1fr);
    max-width: 460px;
    margin: 0 auto;
  }
}

@media (max-width: 640px) {
  .container,
  .nav-container {
    padding: 0 18px;
  }

  .version-pill,
  .nav-github span,
  .btn-nav-cta {
    display: none;
  }

  .hero-band {
    padding: 40px 0 52px;
  }

  .hero-title {
    font-size: 32px;
    line-height: 39px;
  }

  .hero-lead {
    font-size: 16px;
    line-height: 25px;
  }

  .phone-duo {
    height: 500px;
    max-width: 340px;
  }

  .device-front {
    width: 210px;
  }

  .device-back {
    width: 198px;
  }

  .section-block {
    padding: 56px 0;
  }

  .section-title,
  .spotlight-title,
  .cta-banner-title {
    font-size: 26px;
    line-height: 33px;
  }

  .forge-cards-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

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