/* ── Landing Page ── */

/* ── Animations ── */
@keyframes fade-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(32px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.4; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.15); }
}

@keyframes dot-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

.anim-fade-in {
  opacity: 0;
  animation: fade-in 0.7s ease-out forwards;
}

.anim-d1 { animation-delay: 0.12s; }
.anim-d2 { animation-delay: 0.24s; }
.anim-d3 { animation-delay: 0.36s; }
.anim-d4 { animation-delay: 0.5s; }

.anim-slide-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.anim-slide-up.anim-d1 { transition-delay: 0.1s; }
.anim-slide-up.anim-d2 { transition-delay: 0.2s; }

.anim-slide-up.anim-visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card,
.usecase-card {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.feature-card.anim-visible,
.usecase-card.anim-visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.07s; }
.feature-card:nth-child(3) { transition-delay: 0.14s; }
.feature-card:nth-child(4) { transition-delay: 0.21s; }
.feature-card:nth-child(5) { transition-delay: 0.28s; }
.feature-card:nth-child(6) { transition-delay: 0.35s; }

.usecase-card:nth-child(1) { transition-delay: 0s; }
.usecase-card:nth-child(2) { transition-delay: 0.07s; }
.usecase-card:nth-child(3) { transition-delay: 0.14s; }
.usecase-card:nth-child(4) { transition-delay: 0.21s; }

.hide-mobile { display: inline; }

/* ── Hero ── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 24px 64px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: glow-pulse 6s ease-in-out infinite;
}

[data-theme="light"] .hero-glow {
  background: radial-gradient(circle, rgba(0, 0, 0, 0.03) 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-icon {
  margin-bottom: 24px;
  color: var(--text);
  filter: drop-shadow(0 0 24px rgba(255, 255, 255, 0.12));
}

[data-theme="light"] .hero-icon {
  filter: drop-shadow(0 0 24px rgba(0, 0, 0, 0.08));
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
  color: var(--text);
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--text-muted) 0%, var(--text-faint) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  border: none;
  background: var(--primary);
  color: var(--bg);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
  text-decoration: none;
  font-family: var(--font);
  box-shadow: 0 0 0 0 transparent;
}

.hero-cta:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .hero-cta:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.hero-cta:active { transform: scale(0.98); }
.hero-cta svg { width: 18px; height: 18px; }

.hero-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 14px 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  text-decoration: none;
  font-family: var(--font);
}

.hero-cta-secondary:hover {
  background: var(--surface);
  border-color: var(--border-hover);
  color: var(--text);
}

.hero-note {
  font-size: 13px;
  color: var(--text-faint);
}

/* ── Demo window ── */
.hero-demo {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 580px;
}

.demo-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 80px rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .demo-window {
  box-shadow: var(--shadow-lg), 0 0 80px rgba(0, 0, 0, 0.04);
}

.demo-titlebar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-raised);
}

.demo-dots {
  display: flex;
  gap: 6px;
}

.demo-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-hover);
}

.demo-dots span:first-child { background: #ff5f57; }
.demo-dots span:nth-child(2) { background: #febc2e; }
.demo-dots span:last-child { background: #28c840; }

.demo-titlebar-text {
  font-size: 12px;
  color: var(--text-faint);
  font-family: var(--mono);
}

.demo-body {
  padding: 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-family: var(--mono);
  font-size: 13px;
}

.demo-line {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.demo-prompt {
  color: var(--text-faint);
  font-weight: 600;
  min-width: 52px;
}

.demo-file { color: var(--text); font-weight: 500; }

.demo-arrow { color: var(--text-faint); }

.demo-size { color: var(--success); }

.demo-badge-webp {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(46, 160, 67, 0.15);
  color: #3fb950;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.demo-url {
  color: var(--text-muted);
  word-break: break-all;
}

.demo-check {
  color: var(--success);
  font-weight: 700;
  font-size: 15px;
}

.demo-status {
  color: var(--text-muted);
}

/* ── Sections ── */
.section {
  padding: 100px 24px;
}

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

.section-inner {
  max-width: 960px;
  margin: 0 auto;
}

.section-narrow {
  max-width: 640px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
}

.section-desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ── Steps ── */
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
}

.step {
  flex: 1;
  text-align: center;
  padding: 0 20px;
  max-width: 280px;
}

.step-connector {
  display: flex;
  align-items: center;
  padding-top: 28px;
  flex-shrink: 0;
  color: var(--border-hover);
}

.step-icon {
  width: 56px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  color: var(--text-muted);
  margin-bottom: 20px;
  transition: border-color 0.2s, color 0.2s;
}

.step:hover .step-icon {
  border-color: var(--border-hover);
  color: var(--text);
}

.step-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-faint);
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  font-family: var(--mono);
}

.step h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* ── Features grid ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--surface-raised);
  color: var(--text-muted);
  margin-bottom: 16px;
}

.feature-card:hover .feature-icon {
  color: var(--text);
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ── Use cases ── */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.usecase-card {
  padding: 28px 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  text-align: center;
  transition: border-color 0.2s, transform 0.2s;
}

.usecase-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.usecase-emoji {
  font-size: 32px;
  margin-bottom: 14px;
  line-height: 1;
}

.usecase-card h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.usecase-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Snippet ── */
.snippet-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.snippet-tab {
  padding: 8px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-faint);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font);
  transition: color 0.15s, border-color 0.15s;
}

.snippet-tab:hover { color: var(--text-muted); }

.snippet-tab.active {
  color: var(--text);
  border-bottom-color: var(--text);
}

.snippet-block {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.snippet-code {
  padding: 20px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.6;
  overflow-x: auto;
  margin: 0;
}

.snippet-copy {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.snippet-copy:hover {
  background: var(--surface-raised);
  color: var(--text);
  border-color: var(--border-hover);
}

/* ── OSS ── */
.oss-icon {
  color: var(--text-muted);
}

.oss-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

/* ── Footer ── */
.landing-footer {
  padding: 32px 24px;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-faint);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

.footer-sep { opacity: 0.4; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    padding: 48px 20px 40px;
  }

  .hero-title { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hide-mobile { display: none; }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .hero-cta, .hero-cta-secondary {
    width: 100%;
    justify-content: center;
  }

  .steps {
    flex-direction: column;
    align-items: center;
    gap: 24px;
  }

  .step-connector {
    transform: rotate(90deg);
    padding-top: 0;
  }

  .step { max-width: 320px; }

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

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

  .section {
    padding: 64px 20px;
  }

  .section-title { font-size: 28px; }

  .section-header { margin-bottom: 40px; }

  .demo-body { font-size: 11px; padding: 14px; }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 32px; }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .usecases-grid {
    grid-template-columns: 1fr;
  }

  .demo-line { font-size: 10px; }
}

/* ── Old landing classes (compat for app pages) ── */
.landing-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.landing-nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.landing-nav-logo svg { flex-shrink: 0; }

.landing-nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.landing-nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s;
}

.landing-nav-link:hover { color: var(--text); }

@media (max-width: 640px) {
  .landing-nav { padding: 12px 16px; }
}