/* style.css — Scientific Modern Design System */
/* Based on: .stitch/DESIGN.md — "Scientific Modern" */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,wght@0,400;0,500;0,600;1,500&family=Inter:wght@300;400;500;600&family=Space+Grotesk:wght@400;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

/* ─── Design Tokens ─── */
:root {
  --surface:                  #0b1326;
  --surface-dim:              #0b1326;
  --surface-bright:           #31394d;
  --surface-container-lowest: #060e20;
  --surface-container-low:    #131b2e;
  --surface-container:        #171f33;
  --surface-container-high:   #222a3d;
  --surface-container-highest:#2d3449;
  --on-surface:               #dae2fd;
  --on-surface-variant:       #cfc2d6;
  --outline:                  #988d9f;
  --outline-variant:          #4d4354;
  --primary:                  #ddb7ff;
  --on-primary:               #490080;
  --primary-container:        #b76dff;
  --on-primary-container:     #400071;
  --secondary:                #94de2d;
  --on-secondary:             #1f3700;
  --secondary-container:      #7ac100;
  --on-secondary-container:   #2c4900;
  --tertiary:                 #b9c7e0;
  --background:               #0b1326;
  --on-background:            #dae2fd;
  --surface-variant:          #2d3449;
}

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

/* ─── Base ─── */
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--background);
  color: var(--on-background);
  -webkit-font-smoothing: antialiased;
  /* Grid background pattern from design.md */
  background-image:
    linear-gradient(to right, #1E293B 1px, transparent 1px),
    linear-gradient(to bottom, #1E293B 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ─── Typography Scale ─── */
h1, .h1 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--on-background);
}
h2, .h2 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--on-background);
}
h3, .h3 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 24px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--on-background);
}
.font-code, .label-caps {
  font-family: 'Space Grotesk', monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.body-lg {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  line-height: 1.6;
}

/* ─── Material Icons ─── */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  line-height: 1;
}

/* ─── Glow Effects (Elevation) ─── */
.glow-purple {
  box-shadow: 0 0 8px rgba(221, 183, 255, 0.2), 0 0 20px rgba(221, 183, 255, 0.1);
  border: 1px solid var(--primary);
}
.glow-lime {
  box-shadow: 0 0 8px rgba(148, 222, 45, 0.2), 0 0 20px rgba(148, 222, 45, 0.1);
  border: 1px solid var(--secondary);
}
.glow-accent {
  box-shadow: 0 0 20px rgba(148, 222, 45, 0.15);
}

/* ─── Glassmorphism ─── */
.glass-panel {
  background: rgba(23, 31, 51, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* ─── Advertorial Bar ─── */
.advertorial-bar {
  background: var(--surface-container-lowest);
  border-bottom: 1px solid var(--outline-variant);
  padding: 8px 0;
  text-align: center;
  font-family: 'Space Grotesk', monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

/* ─── Navigation Bar ─── */
.nav-bar {
  background: rgba(6, 14, 32, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--outline-variant);
  height: 64px;
  width: 100%;
  z-index: 50;
}
.nav-container {
  max-width: 1440px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 64px;
}
.nav-logo img {
  height: 36px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}

/* ─── Buttons — Sharp corners per design.md ─── */
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 10px 24px;
  border: none;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.8; }

.btn-cta {
  background: var(--secondary);
  color: var(--on-secondary);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 32px;
  border: none;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  transition: filter 0.2s;
}
.btn-cta:hover { filter: brightness(1.1); }

.btn-secondary {
  background: transparent;
  border: 1px solid var(--secondary);
  color: var(--secondary);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 32px;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  transition: background 0.2s;
}
.btn-secondary:hover { background: rgba(148, 222, 45, 0.08); }

/* ─── Hero Section ─── */
.hero-section {
  position: relative;
  border-bottom: 1px solid var(--outline-variant);
  overflow: hidden;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.18;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-inner {
  position: relative;
  z-index: 10;
  max-width: 1440px;
  margin: 0 auto;
  padding: 80px 64px 64px;
}
.hero-tag {
  display: inline-block;
  background: rgba(221, 183, 255, 0.08);
  border: 1px solid var(--primary);
  padding: 4px 12px;
  margin-bottom: 24px;
}
.hero-tag span {
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--primary);
}
.hero-inner h1 {
  max-width: 900px;
  margin-bottom: 16px;
}
.hero-intro {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  max-width: 720px;
  font-style: italic;
}

/* ─── Byline / Meta Bar ─── */
.meta-bar {
  border-bottom: 1px solid var(--outline-variant);
  background: var(--surface-container-lowest);
}
.meta-bar-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 64px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.meta-author-block {
  display: flex;
  align-items: center;
  gap: 24px;
}
.meta-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.meta-label {
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--secondary);
  opacity: 0.8;
}
.meta-value {
  font-family: 'Space Grotesk', monospace;
  font-size: 13px;
  color: var(--on-surface);
}
.meta-divider {
  width: 1px;
  height: 32px;
  background: var(--outline-variant);
}
.meta-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tag-chip {
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  padding: 4px 10px;
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  letter-spacing: 0.05em;
  color: var(--on-surface-variant);
  border-radius: 0;
}

/* ─── Body Content Grid ─── */
.body-grid {
  max-width: 1440px;
  margin: 0 auto;
  padding: 80px 64px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
@media (min-width: 1024px) {
  .body-grid { grid-template-columns: 2fr 1fr; }
}

/* ─── Main Article Column ─── */
.article-col {
  display: flex;
  flex-direction: column;
  gap: 64px;
}

/* Section headings with lime accent bar */
.section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.section-heading::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--secondary);
  flex-shrink: 0;
}
.section-heading h2 {
  margin: 0;
}
.section-intro {
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin-bottom: 32px;
}

/* Before/After image comparison block */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--outline-variant);
  border: 1px solid var(--outline-variant);
}
.compare-cell {
  position: relative;
  background: var(--surface-container);
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.compare-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.compare-cell.legacy img {
  filter: blur(2px) contrast(0.75);
}
.compare-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  padding: 3px 10px;
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.compare-label.legacy { background: rgba(0,0,0,0.7); color: #fff; }
.compare-label.enhanced { background: var(--secondary); color: var(--on-secondary); }

/* Subtitle sync panel */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}
@media (min-width: 768px) { .two-col { grid-template-columns: 1fr 1fr; } }

.sync-panel {
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  padding: 24px;
}
.glow-purple.sync-panel {
  border-color: var(--primary);
  box-shadow: 0 0 12px rgba(221, 183, 255, 0.15);
}
.sync-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.sync-status {
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
}
.sync-bar-wrap {
  height: 6px;
  background: var(--outline-variant);
  overflow: hidden;
  margin-bottom: 16px;
}
.sync-bar-fill {
  height: 100%;
  width: 66%;
  background: var(--primary);
}
.sync-quote {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 17px;
  font-style: italic;
  color: var(--on-surface);
  margin-bottom: 16px;
}
.sync-langs {
  display: flex;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--outline-variant);
}
.lang-chip {
  padding: 3px 8px;
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  letter-spacing: 0.05em;
}
.lang-chip.active { background: rgba(221, 183, 255, 0.15); color: var(--primary); }
.lang-chip.inactive { background: var(--surface-container-high); color: var(--on-surface-variant); }

/* Format grid cards */
.format-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (min-width: 640px) { .format-grid { grid-template-columns: repeat(4, 1fr); } }

.format-card {
  border: 1px solid var(--outline-variant);
  padding: 16px;
  background: var(--surface-container-lowest);
  transition: border-color 0.2s;
  cursor: default;
}
.format-card:hover { border-color: var(--primary); }
.format-card .material-symbols-outlined {
  color: var(--primary);
  font-size: 28px;
  margin-bottom: 8px;
  display: block;
}
.format-card h4 {
  font-family: 'Space Grotesk', monospace;
  font-size: 14px;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 4px;
}
.format-card p {
  font-size: 10px;
  color: var(--outline);
  line-height: 1.4;
}

/* Feature list in article */
.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.5;
}
.feature-list li .material-symbols-outlined {
  color: var(--secondary);
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}
.feature-list li strong { color: var(--on-surface); }

/* ─── Sidebar / Product Spotlight ─── */
.sidebar-col {
  position: relative;
}
.sidebar-sticky {
  position: sticky;
  top: 88px;
  background: rgba(23, 31, 51, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--outline-variant);
  padding: 32px;
}
.sidebar-sticky.glow-lime { border-color: var(--secondary); }
.sidebar-product-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.sidebar-icon {
  width: 40px;
  height: 40px;
  background: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sidebar-icon .material-symbols-outlined {
  color: var(--on-secondary);
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}
.sidebar-product-name {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 24px;
  font-weight: 500;
  color: var(--on-background);
  line-height: 1;
  margin-bottom: 4px;
}
.sidebar-edition {
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--secondary);
}

.sidebar-image-wrap {
  background: var(--surface-container-high);
  aspect-ratio: 1;
  position: relative;
  overflow: hidden;
  margin-bottom: 24px;
}
.sidebar-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
  transition: opacity 0.3s;
}
.sidebar-image-wrap:hover img { opacity: 0.8; }
.sidebar-image-badge {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sidebar-image-badge span {
  background: rgba(148, 222, 45, 0.15);
  border: 1px solid var(--secondary);
  padding: 6px 12px;
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--secondary);
}

.sidebar-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}
.sidebar-checklist li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--on-surface-variant);
}
.sidebar-checklist li .material-symbols-outlined {
  color: var(--secondary);
  font-size: 16px;
}

.sidebar-cta-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sidebar-cta-group .btn-cta,
.sidebar-cta-group .btn-secondary {
  width: 100%;
  text-align: center;
}

/* ─── Full-Width Product CTA Section ─── */
.cta-section {
  width: 100%;
  background: var(--surface-container-lowest);
  border-top: 1px solid var(--outline-variant);
  border-bottom: 1px solid var(--outline-variant);
  padding: 80px 64px;
}
.cta-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 48px;
  align-items: center;
}
@media (min-width: 768px) {
  .cta-inner { flex-direction: row; }
}
.cta-text { flex: 1; }
.cta-text h2 {
  margin-bottom: 16px;
}
.cta-text p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin-bottom: 24px;
}
.cta-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}
.cta-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--on-surface-variant);
  line-height: 1.5;
}
.cta-feature-list li .material-symbols-outlined {
  color: var(--secondary);
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}
.cta-feature-list li strong { color: var(--on-surface); }
.cta-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.cta-logo-block {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  min-width: 240px;
}
.cta-logo {
  width: 180px;
  height: auto;
  display: block;
  outline: 2px solid var(--primary);
  outline-offset: 6px;
}

/* ─── Disclaimer ─── */
.disclaimer-section {
  background: var(--surface-container-lowest);
  border-bottom: 1px solid var(--outline-variant);
  padding: 24px 64px;
}
.disclaimer-inner {
  max-width: 1440px;
  margin: 0 auto;
}
.disclaimer-box {
  padding: 16px 20px;
  border: 1px solid var(--outline-variant);
  background: rgba(6, 14, 32, 0.6);
  font-family: 'Space Grotesk', monospace;
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--outline);
}
.disclaimer-box a {
  color: var(--on-surface-variant);
  text-decoration: underline;
}

/* ─── Footer ─── */
.footer {
  background: var(--surface-container-lowest);
  border-top: 1px solid var(--outline-variant);
  padding: 48px 64px;
}
.footer-inner {
  max-width: 1440px;
  margin: 0 auto;
  text-align: center;
}
.footer-nav-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 32px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--outline-variant);
}
.footer-nav-row a {
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--outline);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-nav-row a:hover { color: var(--secondary); }

.footer-contact {
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.footer-contact h4 {
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 12px;
}
.footer-contact p {
  font-family: 'Space Grotesk', monospace;
  font-size: 12px;
  color: var(--outline);
  line-height: 1.7;
  letter-spacing: 0.03em;
}

.footer-copy {
  font-family: 'Space Grotesk', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--outline-variant);
  text-align: center;
}

/* ─── Sticky Mobile CTA ─── */
.sticky-mobile-cta {
  position: fixed;
  bottom: 20px;
  left: 16px;
  right: 16px;
  z-index: 40;
  display: block;
}
@media (min-width: 768px) { .sticky-mobile-cta { display: none; } }

/* ─── Responsive Adjustments ─── */
@media (max-width: 1024px) {
  .nav-container,
  .hero-inner,
  .meta-bar-inner,
  .body-grid,
  .cta-section,
  .disclaimer-section,
  .footer { padding-left: 32px; padding-right: 32px; }
}
@media (max-width: 640px) {
  .nav-container,
  .hero-inner,
  .meta-bar-inner,
  .body-grid,
  .cta-section,
  .disclaimer-section,
  .footer { padding-left: 20px; padding-right: 20px; }
  .compare-grid { grid-template-columns: 1fr; }
  .sidebar-sticky { position: static; }
  .cta-logo-block { min-width: unset; width: 100%; }
}