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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  --bg: #08080a;
  --bg-elevated: #0f0f12;
  --bg-card: #141418;
  --border: #1e1e26;
  --border-subtle: rgba(255,255,255,0.05);
  --text: #ededf0;
  --text-secondary: #8e8e9a;
  --text-tertiary: #5c5c68;
  --accent: #f75f2e;
  --accent-glow: rgba(247, 95, 46, 0.15);
  --green: #3fb950;
  --green-dim: #2da44e;
  --radius: 10px;
  --radius-sm: 6px;

  --nav-bg: rgba(8, 8, 10, 0.72);
  --nav-border: rgba(30, 30, 38, 0.6);

  --mockup-bg: #1c1c22;
  --mockup-sidebar: #16161a;
  --mockup-border: rgba(255,255,255,0.06);
  --mockup-text: #e0e0e4;
  --mockup-dim: #6e6e78;

  --card-shadow: none;
  --mockup-shadow: 0 0 0 1px rgba(0,0,0,0.5), 0 20px 60px rgba(0,0,0,0.5);
}

[data-theme="light"] {
  --bg: #f5f5f7;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --border: #d2d2d7;
  --border-subtle: rgba(0,0,0,0.06);
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --accent-glow: rgba(247, 95, 46, 0.08);
  --green: #2da44e;
  --green-dim: #2da44e;

  --nav-bg: rgba(245, 245, 247, 0.72);
  --nav-border: rgba(210, 210, 215, 0.6);

  --mockup-bg: #ffffff;
  --mockup-sidebar: #f5f5f7;
  --mockup-border: rgba(0,0,0,0.08);
  --mockup-text: #1d1d1f;
  --mockup-dim: #86868b;

  --mockup-shadow: 0 0 0 1px rgba(0,0,0,0.06), 0 20px 60px rgba(0,0,0,0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 32px;
}

/* === Noise === */
.noise {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

[data-theme="light"] .noise { opacity: 0.035; }

/* === Navigation === */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--nav-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 32px;
  height: 52px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 650;
  color: var(--text);
  letter-spacing: -0.01em;
}

.nav-logo { border-radius: 4px; flex-shrink: 0; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0;
  transition: border-color 0.2s, color 0.2s;
}

.theme-toggle:hover { border-color: var(--accent); color: var(--text); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Language Switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 1px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  cursor: pointer;
  font-size: 11px;
  font-family: inherit;
  font-weight: 500;
  color: var(--text-secondary);
  transition: border-color 0.2s;
}

.lang-switch:hover { border-color: var(--accent); }

.lang-option {
  padding: 2px 5px;
  border-radius: 4px;
  transition: all 0.2s;
}

.lang-option.active { background: var(--accent); color: #fff; }

.lang-divider {
  color: var(--border);
  user-select: none;
  margin: 0 1px;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 550;
  font-family: inherit;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  padding: 10px 22px;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow), 0 1px 2px rgba(0,0,0,0.3);
}

.btn-primary:hover {
  background: #e85525;
  border-color: #e85525;
  box-shadow: 0 0 28px rgba(247, 95, 46, 0.25), 0 2px 4px rgba(0,0,0,0.3);
  transform: translateY(-1px);
}

.btn-large {
  padding: 14px 28px;
  font-size: 15px;
}

/* === Section Title === */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

/* === Hero === */
.hero {
  padding: 140px 0 80px;
}

.hero-grid {
  display: flex;
  align-items: center;
  gap: 80px;
}

.hero-text {
  flex: 0 0 340px;
}

.hero-title {
  font-size: 40px;
  font-weight: 720;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.hero-version {
  font-size: 12px;
  color: var(--text-tertiary);
}

.hero-visual {
  flex: 1;
  min-width: 0;
}

/* Hero Mockup */
.hero-mockup {
  border-radius: 8px;
  overflow: hidden;
  background: var(--mockup-bg);
  border: 1px solid var(--mockup-border);
  box-shadow: var(--mockup-shadow);
}

.hero-mockup-titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 12px;
  background: var(--mockup-sidebar);
  border-bottom: 1px solid var(--mockup-border);
}

.hero-mockup-titlebar span {
  width: 10px; height: 10px;
  border-radius: 50%;
}

.hero-mockup-titlebar span:nth-child(1) { background: #ed6a5e; }
.hero-mockup-titlebar span:nth-child(2) { background: #f0c040; }
.hero-mockup-titlebar span:nth-child(3) { background: #4ec94e; }

.hero-mockup-body {
  display: flex;
  height: 280px;
}

.hm-sidebar {
  width: 160px;
  min-width: 160px;
  border-right: 1px solid var(--mockup-border);
  background: var(--mockup-sidebar);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hm-list {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px;
  border-radius: 5px;
  cursor: default;
}

.hm-list.active {
  background: rgba(247, 95, 46, 0.1);
  border: 1px solid rgba(247, 95, 46, 0.2);
}

.hm-list-icon { font-size: 12px; flex-shrink: 0; }

.hm-list > div { flex: 1; min-width: 0; }

.hm-list-name {
  font-size: 10px;
  font-weight: 550;
  color: var(--mockup-text);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hm-list-bar {
  height: 3px;
  background: rgba(128,128,128,0.15);
  border-radius: 2px;
  overflow: hidden;
}

.hm-list-bar span {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}

.hm-list-bar span.done { background: var(--green); }

.hm-list-count {
  font-size: 9px;
  font-weight: 550;
  color: var(--mockup-dim);
  flex-shrink: 0;
}

.hm-list-count.done { color: var(--green); }

.hm-detail {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--mockup-bg);
}

.hm-detail-title {
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  color: var(--mockup-text);
  border-bottom: 1px solid var(--mockup-border);
}

.hm-items {
  flex: 1;
  padding: 8px 14px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.hm-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 4px;
  font-size: 11px;
  color: var(--mockup-text);
}

.hm-item span {
  font-size: 10px;
  width: 14px;
  text-align: center;
  flex-shrink: 0;
  color: var(--mockup-dim);
}

.hm-item.checked .hm-text { color: var(--mockup-dim); text-decoration: line-through; }
.hm-item.checked span:first-child { color: var(--green); }

/* === Selling Points === */
.selling-points {
  padding: 80px 0;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
}

.sp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.sp-card {
  text-align: center;
}

.sp-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.sp-card h3 {
  font-size: 14px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.sp-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 200px;
  margin: 0 auto;
}

/* === Comparison === */
.comparison {
  padding: 100px 0;
}

.compare-table-wrap {
  max-width: 520px;
  margin: 0 auto;
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.compare-table th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 650;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.compare-table th:first-child { width: 50%; }

.compare-table td {
  padding: 10px 16px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.compare-table td.check { color: var(--green); font-weight: 600; text-align: center; }
.compare-table td.cross { color: var(--text-tertiary); text-align: center; }
.compare-table td.warn { color: #d29922; text-align: center; }

.compare-logo {
  display: inline-block;
  vertical-align: text-bottom;
  border-radius: 3px;
  margin-right: 2px;
}

/* === Local-First === */
.local-first {
  padding: 100px 0;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.local-grid {
  display: flex;
  align-items: flex-start;
  gap: 64px;
  max-width: 720px;
  margin: 0 auto;
}

.local-text {
  flex: 1;
}

.local-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.local-features li {
  font-size: 14px;
  color: var(--text-secondary);
  padding-left: 24px;
  position: relative;
  line-height: 1.5;
}

.local-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 600;
  font-size: 12px;
}

.local-path {
  flex-shrink: 0;
}

.local-path code {
  display: block;
  font-size: 12px;
  font-family: "SF Mono", "Menlo", "Monaco", monospace;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 12px;
}

.local-tree {
  font-size: 12px;
  font-family: "SF Mono", "Menlo", "Monaco", monospace;
  color: var(--text-tertiary);
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 8px;
}

.local-tree .indent { padding-left: 16px; }

/* === Feature Showcase === */
.showcase-features {
  padding: 100px 0;
}

.sf-row {
  display: flex;
  align-items: center;
  gap: 64px;
  padding: 48px 0;
}

.sf-row + .sf-row {
  border-top: 1px solid var(--border-subtle);
}

.sf-row.reverse {
  flex-direction: row-reverse;
}

.sf-text {
  flex: 1;
}

.sf-text h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.sf-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}

.sf-visual {
  flex: 0 0 280px;
}

/* SF Cards */
.sf-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sf-card-row {
  font-size: 13px;
  color: var(--text);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sf-card-row span {
  font-size: 11px;
  font-weight: 550;
  color: var(--text-secondary);
}

.sf-card-row span.done { color: var(--green); }

.sf-card-row.pinned {
  background: rgba(247, 95, 46, 0.08);
  color: var(--accent);
}

.sf-card-row.archived {
  color: var(--text-tertiary);
}

/* SF Search Bar */
.sf-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.sf-search-icon { font-size: 14px; opacity: 0.6; }

.sf-search-placeholder {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* SF Theme Toggle */
.sf-theme-toggle-visual {
  display: flex;
  gap: 16px;
  justify-content: center;
  font-size: 48px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* === Audience === */
.audience {
  padding: 100px 0;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.audience-card {
  text-align: center;
  padding: 24px 16px;
}

.audience-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.audience-card h4 {
  font-size: 14px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 6px;
}

.audience-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* === Final CTA === */
.cta-final {
  padding: 120px 0;
  text-align: center;
}

.cta-title {
  font-size: 32px;
  font-weight: 720;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.cta-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.5;
}

.cta-version {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 14px;
}

/* === Footer === */
.footer {
  padding: 48px 0 36px;
  text-align: center;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
}

.footer-logo { border-radius: 4px; }

.footer-name {
  font-size: 15px;
  font-weight: 650;
  color: var(--text);
  letter-spacing: -0.01em;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-copy {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* === Scroll Animations === */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 860px) {
  .hero-grid {
    flex-direction: column;
    gap: 48px;
  }

  .hero-text {
    flex: none;
    text-align: center;
  }

  .hero-actions {
    align-items: center;
  }

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

  .sp-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }

  .sf-row,
  .sf-row.reverse {
    flex-direction: column;
    gap: 32px;
  }

  .sf-visual {
    flex: none;
    width: 100%;
  }

  .local-grid {
    flex-direction: column;
    gap: 32px;
  }

  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-title { font-size: 22px; }
  .cta-title { font-size: 26px; }
}

@media (max-width: 520px) {
  .hero { padding: 110px 0 48px; }
  .hero-title { font-size: 28px; }
  .hero-subtitle { font-size: 15px; }

  .sp-grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }

  .section-title { font-size: 20px; }
  .cta-title { font-size: 22px; }
  .cta-subtitle { font-size: 14px; }

  .container { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
}