/* ============================================================
   FlowSync – Global Stylesheet
   ダークモード対応・レスポンシブ
   ============================================================ */

/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* Colors – Light Mode */
  --bg-base:        #ffffff;
  --bg-surface:     #f8fafc;
  --bg-elevated:    #f1f5f9;
  --bg-card:        #ffffff;
  --border:         #e2e8f0;
  --border-subtle:  rgba(0,0,0,0.06);

  --text-primary:   #0f172a;
  --text-secondary: #475569;
  --text-muted:     #94a3b8;
  --text-inverse:   #ffffff;

  /* Brand */
  --brand-500:  #6366f1;
  --brand-600:  #4f46e5;
  --brand-700:  #4338ca;
  --brand-400:  #818cf8;
  --brand-glow: rgba(99,102,241,0.35);

  /* Accent */
  --accent-cyan:    #06b6d4;
  --accent-violet:  #8b5cf6;
  --accent-emerald: #10b981;
  --accent-rose:    #f43f5e;

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
  --gradient-hero:  linear-gradient(160deg, #6366f1 0%, #4f46e5 40%, #8b5cf6 100%);

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-lg:  0 12px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-xl:  0 24px 48px rgba(0,0,0,0.12), 0 8px 24px rgba(0,0,0,0.08);
  --shadow-brand: 0 8px 32px rgba(99,102,241,0.35);

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-section: 96px;

  /* Radius */
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---------- Dark Mode Tokens ---------- */
[data-theme="dark"] {
  --bg-base:        #0a0e1a;
  --bg-surface:     #0f1525;
  --bg-elevated:    #161d30;
  --bg-card:        #131929;
  --border:         #1e2a42;
  --border-subtle:  rgba(255,255,255,0.06);

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #475569;
  --text-inverse:   #0f172a;

  --brand-glow: rgba(99,102,241,0.20);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg:  0 12px 32px rgba(0,0,0,0.5);
  --shadow-xl:  0 24px 48px rgba(0,0,0,0.6);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s var(--ease-out), color 0.3s var(--ease-out);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input { font-family: inherit; }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Gradient Text ---------- */
.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s var(--ease-out);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(99,102,241,0.50);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--brand-500);
  border: 1.5px solid var(--brand-500);
}
.btn-outline:hover {
  background: var(--brand-500);
  color: #fff;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.btn-ghost-white {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
}
.btn-ghost-white:hover {
  background: rgba(255,255,255,0.22);
  transform: translateY(-2px);
}

.btn-large {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
  justify-content: center;
  padding: 14px;
}

/* ---------- Section Shared ---------- */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(139,92,246,0.12));
  border: 1px solid rgba(99,102,241,0.25);
  color: var(--brand-500);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Fade-in Animation ---------- */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: all 0.3s var(--ease-out);
  padding: 4px 0;
}

.navbar--scrolled {
  background: rgba(var(--bg-base-rgb, 255,255,255), 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid var(--border-subtle);
}

[data-theme="dark"] .navbar--scrolled {
  background: rgba(10,14,26,0.85);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}
.theme-toggle:hover {
  color: var(--brand-500);
  border-color: var(--brand-500);
  background: rgba(99,102,241,0.08);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s var(--ease-out);
  transform-origin: center;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(99,102,241,0.5) 0%, transparent 70%);
  top: -200px; right: -100px;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(139,92,246,0.4) 0%, transparent 70%);
  bottom: 0; left: -100px;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(6,182,212,0.3) 0%, transparent 70%);
  top: 40%; left: 40%;
}
[data-theme="dark"] .hero-orb { opacity: 0.25; }

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 0%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.3);
  color: var(--brand-500);
  font-size: 13px;
  font-weight: 600;
  animation: pulse-badge 2.5s ease-in-out infinite;
}
.hero-badge i { color: #f59e0b; }

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99,102,241,0.3); }
  50% { box-shadow: 0 0 0 6px rgba(99,102,241,0); }
}

.hero-title {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text-primary);
  max-width: 800px;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.75;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 20px 36px;
  box-shadow: var(--shadow-md);
  margin-top: 8px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 28px;
}

.stat-number {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

.hero-brands {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.brands-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.brands-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.brand-tag {
  padding: 5px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.brand-tag:hover {
  border-color: var(--brand-500);
  color: var(--brand-500);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounce-hint 2s ease-in-out infinite;
}

@keyframes bounce-hint {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

.hide-mobile { display: inline; }

/* ============================================================
   FEATURES
   ============================================================ */
.features {
  padding: var(--space-section) 0;
  background: var(--bg-surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover {
  border-color: rgba(99,102,241,0.5);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(99,102,241,0.15);
}

.feature-card:hover::before { opacity: 0.03; }

.feature-card--large {
  grid-column: span 2;
}

.feature-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(139,92,246,0.15));
  border: 1px solid rgba(99,102,241,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--brand-500);
  margin-bottom: 16px;
  transition: all 0.3s;
}

.feature-card:hover .feature-icon-wrap {
  background: var(--gradient-brand);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(99,102,241,0.4);
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.feature-list li i {
  color: var(--accent-emerald);
  font-size: 11px;
  flex-shrink: 0;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials {
  padding: var(--space-section) 0;
  background: var(--bg-base);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.3s var(--ease-out);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99,102,241,0.3);
}

.testimonial-card--featured {
  background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.08));
  border-color: rgba(99,102,241,0.35);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(99,102,241,0.12);
}

.testimonial-stars { color: #f59e0b; font-size: 14px; letter-spacing: 2px; }

.testimonial-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  flex: 1;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.testimonial-role {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   PRICING
   ============================================================ */
.pricing {
  padding: var(--space-section) 0;
  background: var(--bg-surface);
}

.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.toggle-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}
.toggle-label.active { color: var(--brand-500); }

.discount-badge {
  background: linear-gradient(135deg, #10b981, #06b6d4);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}

.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  cursor: pointer;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: var(--radius-full);
  transition: background 0.3s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  left: 4px; top: 4px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.3s var(--ease-spring);
  box-shadow: var(--shadow-sm);
}
.toggle-switch input:checked + .toggle-slider {
  background: var(--brand-500);
}
.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: center;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  position: relative;
  transition: all 0.3s var(--ease-out);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.pricing-card--featured {
  background: linear-gradient(160deg, rgba(79,70,229,0.08) 0%, rgba(139,92,246,0.08) 100%);
  border-color: rgba(99,102,241,0.5);
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(99,102,241,0.2);
  transform: scale(1.04);
}
.pricing-card--featured:hover { transform: scale(1.04) translateY(-6px); }

.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(99,102,241,0.4);
  letter-spacing: 0.04em;
}

.plan-header { margin-bottom: 20px; }

.plan-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(139,92,246,0.15));
  border: 1px solid rgba(99,102,241,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--brand-500);
  margin-bottom: 14px;
}

.plan-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.plan-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 2px;
  margin-bottom: 4px;
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 2px;
}

.price-amount {
  font-size: 44px;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
  transition: all 0.3s;
}

.price-amount--custom {
  font-size: 32px;
}

.price-period {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-per-user {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.plan-features li i {
  width: 18px;
  text-align: center;
  font-size: 12px;
}

.plan-features .fa-check { color: var(--accent-emerald); }
.plan-features .fa-times { color: var(--text-muted); }

.plan-feature--disabled {
  opacity: 0.5;
}

.pricing-note {
  text-align: center;
  margin-top: 36px;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.pricing-note i { color: var(--accent-emerald); }

/* ============================================================
   FAQ
   ============================================================ */
.faq {
  padding: var(--space-section) 0;
  background: var(--bg-base);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item.open {
  border-color: rgba(99,102,241,0.4);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  transition: background 0.2s;
  background: transparent;
}

.faq-question:hover { background: var(--bg-elevated); }

.faq-icon {
  color: var(--text-muted);
  font-size: 13px;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-out);
}

.faq-item.open .faq-icon { transform: rotate(180deg); color: var(--brand-500); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out);
}

.faq-item.open .faq-answer { max-height: 200px; }

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
  position: relative;
  padding: 96px 0;
  background: var(--gradient-hero);
  overflow: hidden;
  text-align: center;
}

.cta-banner-bg { position: absolute; inset: 0; pointer-events: none; }

.cta-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
}
.cta-orb-1 {
  width: 400px; height: 400px;
  background: rgba(255,255,255,0.12);
  top: -150px; right: -100px;
}
.cta-orb-2 {
  width: 300px; height: 300px;
  background: rgba(6,182,212,0.3);
  bottom: -100px; left: -50px;
}

.cta-banner-content {
  position: relative;
  z-index: 1;
}

.cta-banner h2 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.cta-banner h2 .gradient-text {
  background: linear-gradient(135deg, #c7d2fe, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-banner p {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
}

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

.cta-banner .btn-primary {
  background: #fff;
  color: var(--brand-700);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.3);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-base);
  border-top: 1px solid var(--border);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  transition: all 0.2s;
}
.footer-social a:hover {
  border-color: var(--brand-500);
  color: var(--brand-500);
  background: rgba(99,102,241,0.08);
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: var(--brand-500); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 20px;
}

.footer-legal a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-legal a:hover { color: var(--brand-500); }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet (≤ 1024px) */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-card--large {
    grid-column: span 1;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-brand {
    grid-column: span 2;
  }
  .pricing-card--featured {
    transform: scale(1.02);
  }
  .pricing-card--featured:hover {
    transform: scale(1.02) translateY(-6px);
  }
}

/* Phablet (≤ 768px) */
@media (max-width: 768px) {
  :root { --space-section: 64px; }

  .navbar .btn-ghost { display: none; }
  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-base);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .hero {
    padding: 100px 0 64px;
    min-height: unset;
  }
  .hero-title { font-size: clamp(28px, 8vw, 48px); }
  .hide-mobile { display: none; }
  .hero-stats {
    padding: 16px 20px;
    gap: 8px;
  }
  .stat-item { padding: 0 16px; }
  .stat-number { font-size: 20px; }
  .hero-scroll-hint { display: none; }

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card--featured {
    transform: scale(1);
    order: -1;
  }
  .pricing-card--featured:hover { transform: translateY(-6px); }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: span 2;
  }

  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-legal { flex-wrap: wrap; justify-content: center; }
}

/* Mobile (≤ 480px) */
@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn-large { justify-content: center; }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
    padding: 20px;
  }
  .stat-divider {
    width: 60px;
    height: 1px;
  }
  .stat-item { padding: 0; }

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

  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-brand { grid-column: span 1; }

  .cta-banner-actions { flex-direction: column; align-items: stretch; }
}

/* ============================================================
   SCROLLBAR CUSTOMIZATION
   ============================================================ */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--brand-500); }

/* ============================================================
   SELECTION COLOR
   ============================================================ */
::selection {
  background: rgba(99,102,241,0.25);
  color: var(--text-primary);
}

/* ============================================================
   FOCUS VISIBLE
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 3px;
  border-radius: 4px;
}