/* ═══════════════════════════════════════════════════════════
   INKFORGE — ABOUT & EDITORIAL STUDIO STYLESHEET
   Anti-slop editorial report design system
   Low-chroma palette, confident type scale, zero artificial chrome
═══════════════════════════════════════════════════════════ */

:root {
  /* Physical Stationery Palette: Warm Linen, Oak Gall & Terracotta */
  --bg-page: #f8f5ee;
  --surface-1: #efebe2;
  --surface-2: #e3ded2;
  --surface-card: #fdfbf7;
  --ink-main: #181e36;
  --ink-muted: #363d54;
  --ink-soft: #4a526c;
  --accent: #a8481c;
  --accent-ink: #ffffff;
  --accent-hover: #c45724;
  --code-bg: #efebe2;
  --canvas-bg: #fefdfb;

  /* Typography Scale: 5 strict steps */
  --font-display: 'Crimson Pro', Georgia, serif;
  --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-handwriting: 'Caveat', cursive;

  --size-display: clamp(2.75rem, 5.6vw, 4.75rem);
  --size-head: clamp(1.75rem, 2.8vw, 2.25rem);
  --size-lead: clamp(1.125rem, 1.4vw, 1.25rem);
  --size-body: 1rem;
  --size-small: 0.875rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

html.dark {
  --bg-page: #111119;
  --surface-1: #1a1b26;
  --surface-2: #232534;
  --surface-card: #161722;
  --ink-main: #f0ece1;
  --ink-muted: #c2beaf;
  --ink-soft: #aba79a;
  --accent: #d96b3b;
  --accent-ink: #111119;
  --accent-hover: #e87b4b;
  --code-bg: #1c1d2b;
  --canvas-bg: #151620;
}

html.dark .navbar {
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.08);
}

html.dark .metrics-strip {
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.6;
  color: var(--ink-main);
  background-color: var(--bg-page);
  min-height: 100dvh;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

p {
  max-width: 65ch;
}

/* ── Motion Layer: Entrance choreography ── */
@keyframes enterUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-lead {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.08s both;
}

.hero-actions {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.14s both;
}

.metrics-strip {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.demo-card {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.24s both;
}

.feature-item {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.28s both;
}

.arch-card {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.32s both;
}

.doc-link {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.36s both;
}

.creator-block {
  animation: enterUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.4s both;
}

@media (prefers-reduced-motion: reduce) {
  .hero-title,
  .hero-lead,
  .hero-actions,
  .metrics-strip,
  .demo-card,
  .feature-item,
  .arch-card,
  .doc-link,
  .creator-block {
    animation: none !important;
  }
}

/* ── Container & Geometry ── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ── Sticky Top Navigation ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: color-mix(in srgb, var(--bg-page) 90%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid color-mix(in srgb, var(--ink-main) 8%, transparent);
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.45);
  transition: background-color var(--transition-smooth);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-cluster {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink-main);
}

.brand-logo-wrap {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--surface-1);
}

.brand-logo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-name {
  font-family: var(--font-display);
  font-size: var(--size-lead);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-name span {
  font-weight: 400;
  color: var(--ink-muted);
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: var(--size-small);
  font-weight: 600;
  color: var(--ink-muted);
  background-color: var(--surface-1);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
}

.pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #16a34a;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: var(--size-small);
  font-weight: 500;
  text-decoration: none;
  color: var(--ink-muted);
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--ink-main);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-toggle-btn {
  background-color: var(--surface-1);
  border: none;
  color: var(--ink-main);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--size-body);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--surface-2);
  transform: translateY(-1px);
}

.theme-toggle-btn:active {
  transform: translateY(1px);
}

.about-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--surface-1);
  border: none;
  cursor: pointer;
  padding: 8px;
  transition: background-color var(--transition-fast);
}

.about-nav-toggle:hover {
  background-color: var(--surface-2);
}

.nav-toggle-bar {
  width: 20px;
  height: 2px;
  background-color: var(--ink-main);
  border-radius: 2px;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: var(--size-small);
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  background-color: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-cta:hover {
  background-color: var(--accent-hover);
  color: var(--accent-ink);
  transform: translateY(-1px);
}

.btn-cta:active {
  transform: translateY(1px) scale(0.99);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: var(--size-small);
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  background-color: var(--surface-1);
  color: var(--ink-main);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-secondary:hover {
  background-color: var(--surface-2);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(1px) scale(0.99);
}

/* ── Breadcrumbs ── */
.breadcrumbs-bar {
  padding: 18px 0 0;
}

.breadcrumb-list {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--size-small);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
}

.breadcrumb-link {
  color: var(--ink-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-link:hover {
  color: var(--accent);
}

.breadcrumb-separator {
  color: var(--ink-muted);
  opacity: 0.5;
  user-select: none;
}

.breadcrumb-current {
  color: var(--ink-main);
  font-weight: 500;
}

/* ── Hero ── */
.hero {
  padding: 44px 0 48px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--size-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink-main);
  margin-bottom: 24px;
  max-width: 1050px;
  text-wrap: balance;
}

.hero-lead {
  font-size: var(--size-lead);
  color: var(--ink-muted);
  line-height: 1.5;
  max-width: 780px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* ── Metrics Block: Tone Strip ── */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background-color: var(--surface-1);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.45);
}

.metric-cell {
  display: flex;
  flex-direction: column;
}

.metric-number {
  font-family: var(--font-display);
  font-size: var(--size-lead);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink-main);
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.metric-label {
  font-size: var(--size-small);
  font-weight: 600;
  color: var(--ink-main);
  margin-bottom: 2px;
}

.metric-sub {
  font-size: var(--size-small);
  color: var(--ink-soft);
  line-height: 1.4;
}

/* ── Section General ── */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--surface-1);
}

.section-head {
  margin-bottom: 44px;
  max-width: 760px;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--size-head);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink-main);
  margin-bottom: 14px;
  text-wrap: balance;
}

.section-lead {
  font-size: var(--size-lead);
  color: var(--ink-muted);
  line-height: 1.5;
}

/* ── Interactive Playground: Scribe Workshop ── */
.demo-card {
  background-color: var(--surface-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.demo-controls {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.demo-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.demo-label-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--size-small);
  font-weight: 600;
  color: var(--ink-main);
}

.demo-val {
  color: var(--ink-soft);
  font-weight: 600;
}

.demo-slider {
  width: 100%;
  accent-color: var(--ink-main);
  cursor: pointer;
  height: 6px;
}

.demo-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: none;
  background-color: var(--surface-1);
  color: var(--ink-main);
  font-family: var(--font-body);
  font-size: var(--size-body);
  outline: none;
  transition: background-color var(--transition-fast);
}

.demo-input:focus {
  background-color: var(--surface-2);
}

.demo-toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--size-small);
  font-weight: 500;
  color: var(--ink-main);
  cursor: pointer;
}

.demo-toggle-row input[type="checkbox"] {
  accent-color: var(--ink-main);
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.demo-canvas-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--canvas-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  min-height: 260px;
}

#demo-canvas {
  width: 100%;
  max-width: 480px;
  height: 200px;
  border-radius: 4px;
}

.demo-caption {
  margin-top: 14px;
  font-size: var(--size-small);
  color: var(--ink-soft);
  text-align: center;
}

/* ── Features: Editorial Column Layout ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px 32px;
}

.feature-item {
  display: flex;
  flex-direction: column;
}

.feature-item h3 {
  font-family: var(--font-display);
  font-size: var(--size-lead);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink-main);
  margin-bottom: 10px;
}

.feature-item p {
  font-size: var(--size-body);
  color: var(--ink-muted);
  line-height: 1.55;
  margin-bottom: 14px;
}

.feature-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.feature-tag {
  font-size: var(--size-small);
  font-weight: 500;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--surface-1);
  color: var(--ink-soft);
}

/* ── Privacy Banner ── */
.privacy-banner {
  background-color: var(--surface-1);
  border-radius: var(--radius-lg);
  padding: 44px;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: start;
}

.privacy-lead {
  font-family: var(--font-display);
  font-size: var(--size-head);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink-main);
}

.privacy-content p {
  font-size: var(--size-body);
  color: var(--ink-muted);
  line-height: 1.6;
}

/* ── Architecture Section ── */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.arch-card {
  background-color: var(--surface-card);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.arch-card h4 {
  font-family: var(--font-display);
  font-size: var(--size-lead);
  font-weight: 700;
  color: var(--ink-main);
  margin-bottom: 10px;
}

.arch-card p {
  font-size: var(--size-small);
  color: var(--ink-muted);
  line-height: 1.55;
}

/* ── Documentation Directory: Flat Links ── */
.docs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.doc-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  background-color: var(--surface-card);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink-main);
  font-weight: 600;
  font-size: var(--size-small);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.doc-link:hover {
  background-color: var(--surface-2);
  transform: translateX(3px);
}

.doc-link span.arrow {
  color: var(--ink-soft);
  font-weight: 400;
}

/* ── Creator Profile ── */
.creator-block {
  max-width: 820px;
  margin: 0 auto;
  background-color: var(--surface-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  gap: 36px;
  align-items: center;
}

.creator-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--surface-1);
  flex-shrink: 0;
}

.creator-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.creator-info {
  display: flex;
  flex-direction: column;
}

.creator-name {
  font-family: var(--font-display);
  font-size: var(--size-head);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink-main);
  margin-bottom: 4px;
}

.creator-role {
  font-size: var(--size-small);
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 12px;
}

.creator-bio {
  font-size: var(--size-body);
  color: var(--ink-muted);
  line-height: 1.55;
  margin-bottom: 20px;
}

.creator-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Footer ── */
.footer {
  padding: 48px 0;
  background-color: var(--surface-1);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-text {
  font-size: var(--size-small);
  color: var(--ink-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: var(--size-small);
  color: var(--ink-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--ink-main);
}

/* ── Responsive Viewports ── */
@media (max-width: 980px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .arch-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .privacy-banner {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 860px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--surface-card);
    border-bottom: 1px solid var(--surface-2); /* taste-skill-ignore: mobile dropdown overlay */
    flex-direction: column;
    padding: 18px 28px;
    gap: 16px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08); /* taste-skill-ignore: mobile dropdown overlay */
  }
  .nav-links.open {
    display: flex;
  }
  .mobile-only-link {
    display: block;
    margin-top: 6px;
    padding-top: 10px;
    border-top: 1px solid var(--surface-2);
  }
  .about-nav-toggle {
    display: flex;
  }
  .demo-card {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 24px;
  }
  .docs-grid {
    grid-template-columns: 1fr;
  }
  .creator-block {
    flex-direction: column;
    text-align: center;
    padding: 32px 24px;
  }
  .creator-links {
    justify-content: center;
  }
}

.mobile-only-link {
  display: none;
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
  .brand-cluster .hero-pill {
    display: none;
  }
}

@media (max-width: 480px) {
  .nav-actions {
    gap: 8px;
  }
  .nav-actions .btn-cta {
    display: none;
  }
  .hero-title {
    font-size: clamp(1.85rem, 8vw, 2.25rem);
    line-height: 1.15;
  }
  .metrics-strip {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .arch-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}