/* ============================================================
   NEXUS — SaaS Landing Page Stylesheet
   Author: Nexus Template
   Version: 1.0.0
   Structure:
     1. CSS Variables (Design Tokens)
     2. Reset & Base
     3. Typography
     4. Layout Utilities
     5. Buttons
     6. Navbar
     7. Hero
     8. Features
     9. Pricing
     10. Testimonials
     11. FAQ
     12. Contact
     13. Footer
     14. Scroll Animations
     15. Back to Top
     16. Responsive
============================================================ */

/* ============================================================
   1. CSS VARIABLES — DESIGN TOKENS
============================================================ */
:root {
  /* Color palette — Dark Mode (default) */
  --bg-primary:      #080c14;
  --bg-secondary:    #0d1220;
  --bg-card:         #111827;
  --bg-card-hover:   #161f30;
  --bg-elevated:     #1a2236;

  --text-primary:    #f0f4ff;
  --text-secondary:  #8b9cbf;
  --text-muted:      #4a5578;

  --accent:          #4f7cff;
  --accent-hover:    #6b93ff;
  --accent-glow:     rgba(79, 124, 255, 0.25);
  --accent-subtle:   rgba(79, 124, 255, 0.08);

  --border:          rgba(255, 255, 255, 0.06);
  --border-hover:    rgba(255, 255, 255, 0.12);
  --border-accent:   rgba(79, 124, 255, 0.3);

  --gradient-hero:   linear-gradient(135deg, #4f7cff 0%, #a78bfa 50%, #38bdf8 100%);
  --gradient-accent: linear-gradient(135deg, #4f7cff, #7c3aed);
  --gradient-card:   linear-gradient(145deg, #111827, #0f1a2e);

  --shadow-sm:       0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:       0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg:       0 20px 60px rgba(0,0,0,0.5);
  --shadow-accent:   0 8px 32px rgba(79, 124, 255, 0.25);
  --shadow-glow:     0 0 60px rgba(79, 124, 255, 0.12);

  --nav-bg:          rgba(8, 12, 20, 0.85);
  --nav-blur:        blur(20px);

  /* Typography */
  --font-display:  'Syne', sans-serif;
  --font-body:     'DM Sans', sans-serif;

  /* Spacing */
  --section-pad:   120px;
  --container:     1200px;

  /* Radius */
  --radius-sm:     8px;
  --radius-md:     16px;
  --radius-lg:     24px;
  --radius-xl:     32px;
  --radius-full:   9999px;

  /* Transitions */
  --ease:          cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration:      0.3s;
  --duration-slow: 0.6s;
}

/* Light Mode Overrides */
[data-theme="light"] {
  --bg-primary:      #f7f8fc;
  --bg-secondary:    #ffffff;
  --bg-card:         #ffffff;
  --bg-card-hover:   #f2f4fa;
  --bg-elevated:     #eef0f8;

  --text-primary:    #0d1220;
  --text-secondary:  #4a5578;
  --text-muted:      #9aa3bc;

  --accent:          #4f7cff;
  --accent-hover:    #3b67e8;
  --accent-glow:     rgba(79, 124, 255, 0.18);
  --accent-subtle:   rgba(79, 124, 255, 0.06);

  --border:          rgba(0, 0, 0, 0.07);
  --border-hover:    rgba(0, 0, 0, 0.13);
  --border-accent:   rgba(79, 124, 255, 0.25);

  --gradient-card:   linear-gradient(145deg, #ffffff, #f4f6ff);

  --shadow-sm:       0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:       0 8px 32px rgba(0,0,0,0.08);
  --shadow-lg:       0 20px 60px rgba(0,0,0,0.10);
  --shadow-accent:   0 8px 32px rgba(79, 124, 255, 0.15);
  --shadow-glow:     0 0 60px rgba(79, 124, 255, 0.06);

  --nav-bg:          rgba(247, 248, 252, 0.88);
}

/* ============================================================
   2. RESET & BASE
============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}
details summary { list-style: none; }
details summary::-webkit-details-marker { display: none; }

/* ============================================================
   3. TYPOGRAPHY
============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 3rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 600; }
h4 { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; }

p { color: var(--text-secondary); }

/* ============================================================
   4. LAYOUT UTILITIES
============================================================ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section-pad {
  padding: var(--section-pad) 0;
}

.section-header {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 72px;
}

.section-header-left {
  text-align: left;
  margin: 0 0 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.section-headline {
  margin-bottom: 16px;
}

.section-subline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   5. BUTTONS
============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #ffffff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  transition: background var(--duration) var(--ease),
              transform var(--duration) var(--ease-spring),
              box-shadow var(--duration) var(--ease);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-primary:active { transform: translateY(0); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-hover);
  transition: border-color var(--duration) var(--ease),
              background var(--duration) var(--ease),
              transform var(--duration) var(--ease-spring),
              color var(--duration) var(--ease);
  white-space: nowrap;
}

.btn-outline:hover {
  border-color: var(--border-accent);
  background: var(--accent-subtle);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--border);
}

.btn-large {
  font-size: 1rem;
  padding: 14px 28px;
}

.full-width { width: 100%; justify-content: center; }

.inline-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--duration) var(--ease);
}
.inline-link:hover { color: var(--accent-hover); }

/* ============================================================
   6. NAVBAR
============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 40px;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-mark {
  display: flex;
  align-items: center;
  color: var(--accent);
  transition: transform var(--duration) var(--ease-spring);
}
.nav-logo:hover .logo-mark { transform: rotate(-10deg) scale(1.05); }

.logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-primary);
}

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

.nav-link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--duration) var(--ease);
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { transform: scaleX(1); }

/* Nav actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Theme toggle */
.theme-toggle {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: color var(--duration), background var(--duration), border-color var(--duration);
}
.theme-toggle:hover {
  color: var(--text-primary);
  background: var(--border);
  border-color: var(--border-hover);
}

.theme-icon { display: flex; align-items: center; }

/* Show/hide sun vs moon based on theme */
[data-theme="dark"] .theme-icon.moon { display: none; }
[data-theme="dark"] .theme-icon.sun  { display: flex; }
[data-theme="light"] .theme-icon.sun  { display: none; }
[data-theme="light"] .theme-icon.moon { display: flex; }

/* Nav CTA */
.nav-cta { padding: 9px 18px; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: background var(--duration);
}
.hamburger:hover { background: var(--border); }
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--border);
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
}
.mobile-menu.open { display: flex; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }
.mobile-nav-link {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--duration), color var(--duration);
}
.mobile-nav-link:hover { background: var(--border); color: var(--text-primary); }
.mobile-cta { display: flex; flex-direction: column; gap: 10px; }

/* ============================================================
   7. HERO
============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 68px;
  overflow: hidden;
}

/* Background effects */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 100%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.12;
}
[data-theme="light"] .hero-orb { opacity: 0.06; }

.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #4f7cff, transparent);
  top: -200px; left: -100px;
  animation: orb-drift 20s ease-in-out infinite alternate;
}
.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #a78bfa, transparent);
  top: 100px; right: -150px;
  animation: orb-drift 25s ease-in-out infinite alternate-reverse;
}
.orb-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #38bdf8, transparent);
  bottom: 0; left: 40%;
  animation: orb-drift 18s ease-in-out infinite alternate;
}

@keyframes orb-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.1); }
}

/* Hero content layout */
.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 60px;
}

.hero-content { display: flex; flex-direction: column; }

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-full);
  padding: 6px 14px 6px 10px;
  margin-bottom: 28px;
  width: fit-content;
  transition: border-color var(--duration), color var(--duration);
}
.hero-badge:hover { border-color: var(--border-accent); color: var(--accent); }

.badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.9); }
}

.badge-arrow { color: var(--accent); font-size: 0.9rem; }

/* Headline */
.hero-headline {
  font-size: clamp(2.8rem, 5.5vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.headline-gradient {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Subline */
.hero-subline {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 36px;
}

/* CTA group */
.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

/* Social proof */
.hero-social-proof {
  display: flex;
  align-items: center;
  gap: 14px;
}

.avatar-stack {
  display: flex;
  align-items: center;
}
.avatar-stack img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
  margin-left: -10px;
  object-fit: cover;
  transition: transform var(--duration) var(--ease-spring);
}
.avatar-stack img:first-child { margin-left: 0; }
.avatar-stack:hover img { margin-left: -6px; }

.star-row { color: #f59e0b; font-size: 0.85rem; margin-bottom: 2px; }
.proof-text { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.4; }
.proof-text strong { color: var(--text-primary); font-weight: 600; }

/* Dashboard Mockup */
.hero-visual {
  position: relative;
}

.dashboard-mockup {
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transition: box-shadow 0.5s var(--ease), border-color 0.5s var(--ease);
}
.dashboard-mockup:hover {
  box-shadow: 0 30px 80px rgba(0,0,0,0.5), 0 0 100px rgba(79, 124, 255, 0.15);
  border-color: var(--border-accent);
}

.mockup-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.mockup-dots { display: flex; gap: 6px; }
.mockup-dots span {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.mockup-dots span:nth-child(1) { background: #ef4444; }
.mockup-dots span:nth-child(2) { background: #f59e0b; }
.mockup-dots span:nth-child(3) { background: #22c55e; }

.mockup-url {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  flex: 1;
  max-width: 200px;
}

.mockup-body {
  display: flex;
  min-height: 260px;
}

.mockup-sidebar {
  width: 48px;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  padding: 16px 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-item {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  background: var(--border);
}
.sidebar-item.active {
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
}

.mockup-content { flex: 1; padding: 16px; display: flex; flex-direction: column; gap: 14px; }

.mockup-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.stat-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
}
.stat-label { font-size: 0.65rem; color: var(--text-muted); margin-bottom: 4px; }
.stat-value { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.stat-change { font-size: 0.65rem; font-weight: 600; }
.stat-change.positive { color: #22c55e; }
.stat-change.negative { color: #ef4444; }

.mockup-chart {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  flex: 1;
}
.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 70px;
}
.chart-bar {
  flex: 1;
  background: var(--accent-subtle);
  border-radius: 3px 3px 0 0;
  border: 1px solid var(--border-accent);
  transition: background 0.5s var(--ease);
}
.chart-bar.active {
  background: var(--accent);
  border-color: var(--accent);
}

.mockup-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mockup-activity { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.activity-item {
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--border-hover);
}
.activity-item.short { width: 60%; }

.mockup-pill {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.ai-pill {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.3);
  display: flex;
  align-items: center;
  gap: 5px;
}
.ai-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse-dot 1.5s ease-in-out infinite;
}

/* Floating badges */
.float-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-full);
  padding: 8px 14px;
  box-shadow: var(--shadow-md);
  white-space: nowrap;
  animation: float-bob 4s ease-in-out infinite;
}
.float-badge svg { color: var(--accent); }

.float-badge-1 {
  top: -16px; right: -20px;
  animation-delay: 0s;
}
.float-badge-2 {
  bottom: 30px; left: -24px;
  animation-delay: 1.5s;
}

@keyframes float-bob {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

/* Logo bar */
.logos-bar {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

.logos-label {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.logos-track {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 15%, black 85%, transparent);
}

.logos-inner {
  display: flex;
  gap: 60px;
  animation: logos-scroll 22s linear infinite;
  width: max-content;
}

.logo-item {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color var(--duration);
}
.logo-item:hover { color: var(--text-secondary); }

@keyframes logos-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* Animate on load */
.animate-fade-up {
  opacity: 0;
  transform: translateY(24px);
  animation: fade-up 0.7s var(--ease) forwards;
  animation-delay: var(--delay, 0s);
}

@keyframes fade-up {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   8. FEATURES
============================================================ */
.features {
  position: relative;
}

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

/* First card spans 2 cols */
.feature-card-lg { grid-column: span 2; }

.feature-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--duration) var(--ease),
              transform var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at top left, var(--accent-subtle), transparent 70%);
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease);
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--duration) var(--ease), color var(--duration);
}
.card-link:hover { color: var(--accent-hover); gap: 8px; }

/* Feature card large — mini chart */
.card-visual {
  margin-top: 8px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.chart-mini {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 16px;
}
.mini-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 56px;
}
.mini-bars div {
  flex: 1;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  opacity: 0.4;
  transition: opacity var(--duration);
}
.feature-card:hover .mini-bars div { opacity: 0.7; }
.mini-bars div:last-child { opacity: 0.9; }

/* Accent card (last) */
.feature-card-accent {
  background: linear-gradient(145deg, rgba(79, 124, 255, 0.08), var(--bg-card));
  border-color: var(--border-accent);
}

.integration-logos {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.integration-logos span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-subtle);
  border: 1px solid var(--border-accent);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

/* ============================================================
   9. PRICING
============================================================ */
.pricing {
  background: var(--bg-secondary);
  position: relative;
}

/* Billing toggle */
.billing-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 4px;
  width: fit-content;
  margin: 0 auto 56px;
}

.toggle-btn {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  transition: background var(--duration), color var(--duration), box-shadow var(--duration);
  display: flex;
  align-items: center;
  gap: 8px;
}
.toggle-btn.active {
  background: var(--accent);
  color: #ffffff;
  box-shadow: var(--shadow-accent);
}

.badge-save {
  font-size: 0.7rem;
  font-weight: 700;
  color: #22c55e;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

/* Pricing grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: start;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
  transition: border-color var(--duration), transform var(--duration) var(--ease-spring), box-shadow var(--duration);
}
.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

/* Featured card */
.pricing-card-featured {
  background: linear-gradient(145deg, #101e38, #0d1528);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-accent), 0 0 0 1px var(--border-accent);
  transform: scale(1.03);
}
[data-theme="light"] .pricing-card-featured {
  background: linear-gradient(145deg, #eef2ff, #e8eeff);
}
.pricing-card-featured:hover { transform: scale(1.03) translateY(-6px); }

.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  background: var(--gradient-accent);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  box-shadow: var(--shadow-accent);
}

.plan-header h3 { font-size: 1.3rem; margin-bottom: 6px; }
.plan-desc { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.55; }

.plan-price {
  display: flex;
  align-items: flex-end;
  gap: 2px;
}
.currency {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding-bottom: 6px;
}
.amount {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
  transition: all 0.4s var(--ease);
}
.period {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-bottom: 8px;
}
.amount-custom {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
}
.plan-price-custom { align-items: center; }

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.check {
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}
.plan-features li.unavailable {
  color: var(--text-muted);
  text-decoration: line-through;
}
.plan-features li.unavailable span { color: var(--text-muted); }

.pricing-note {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}
.pricing-note svg { color: var(--accent); flex-shrink: 0; }

/* ============================================================
   10. TESTIMONIALS
============================================================ */
.testimonials { background: var(--bg-primary); }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 72px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: border-color var(--duration), transform var(--duration) var(--ease), box-shadow var(--duration);
}
.testimonial-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.testimonial-card-featured {
  background: linear-gradient(145deg, rgba(79, 124, 255, 0.06), var(--bg-card));
  border-color: var(--border-accent);
}

.stars { font-size: 1rem; color: #f59e0b; letter-spacing: 2px; }

blockquote {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}
.testimonial-author img {
  width: 44px; height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-accent);
}
.testimonial-author strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.testimonial-author span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Stats row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.stat-item {
  background: var(--bg-card);
  padding: 36px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
  transition: background var(--duration);
}
.stat-item:hover { background: var(--bg-card-hover); }

.stat-big {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============================================================
   11. FAQ
============================================================ */
.faq { background: var(--bg-secondary); }

.faq-inner {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 80px;
  align-items: start;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  transition: background var(--duration);
}
.faq-item:last-child { border-bottom: none; }
.faq-item[open] { background: var(--bg-card-hover); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: color var(--duration);
}
.faq-question:hover { color: var(--accent); }

.faq-icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
  position: relative;
  transition: background var(--duration), transform 0.3s var(--ease);
}
.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.faq-icon::before { width: 10px; height: 1.5px; }
.faq-icon::after  { width: 1.5px; height: 10px; }

details[open] .faq-icon {
  background: var(--accent-subtle);
  transform: rotate(45deg);
}
details[open] .faq-icon::before,
details[open] .faq-icon::after { background: var(--accent); }

.faq-answer {
  padding: 0 24px 22px;
  animation: faq-open 0.3s var(--ease);
}
.faq-answer p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

@keyframes faq-open {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   12. CONTACT
============================================================ */
.contact { background: var(--bg-primary); }

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-copy h2 {
  margin-bottom: 16px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}
.contact-copy p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.contact-meta li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.contact-meta svg { color: var(--accent); flex-shrink: 0; }

/* Form */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-form { display: flex; flex-direction: column; gap: 20px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

input, textarea {
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-hover);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 11px 14px;
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--duration), box-shadow var(--duration), background var(--duration);
  width: 100%;
  resize: vertical;
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-card);
}
input:invalid:not(:placeholder-shown) { border-color: #ef4444; }

textarea { min-height: 110px; }

.form-success {
  font-size: 0.9rem;
  color: #22c55e;
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  text-align: center;
}
.form-error {
  font-size: 0.875rem;
  color: #ef4444;
  text-align: center;
}

/* ============================================================
   13. FOOTER
============================================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--border);
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-top: 14px;
  margin-bottom: 22px;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 8px;
}

.social-link {
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color var(--duration), border-color var(--duration), background var(--duration);
}
.social-link:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--border);
}

.footer-col h4 {
  color: var(--text-primary);
  margin-bottom: 18px;
  font-size: 0.78rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--duration);
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}
.footer-bottom p { font-size: 0.82rem; color: var(--text-muted); }

/* ============================================================
   14. SCROLL ANIMATIONS
============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children within a parent */
.features-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.features-grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.features-grid .reveal:nth-child(4) { transition-delay: 0.24s; }
.features-grid .reveal:nth-child(5) { transition-delay: 0.32s; }
.features-grid .reveal:nth-child(6) { transition-delay: 0.40s; }

.pricing-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.pricing-grid .reveal:nth-child(3) { transition-delay: 0.2s; }

.testimonials-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.testimonials-grid .reveal:nth-child(3) { transition-delay: 0.2s; }

.stats-row .reveal:nth-child(2) { transition-delay: 0.08s; }
.stats-row .reveal:nth-child(3) { transition-delay: 0.16s; }
.stats-row .reveal:nth-child(4) { transition-delay: 0.24s; }

/* ============================================================
   15. BACK TO TOP
============================================================ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #ffffff;
  border-radius: 50%;
  box-shadow: var(--shadow-accent);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--duration), transform var(--duration) var(--ease-spring);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover { background: var(--accent-hover); transform: translateY(-3px); }

/* ============================================================
   16. RESPONSIVE
============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root { --section-pad: 80px; }

  .hero .container { grid-template-columns: 1fr; text-align: center; gap: 60px; }
  .hero-content { align-items: center; }
  .hero-subline { max-width: 540px; }
  .hero-cta-group { justify-content: center; }
  .hero-social-proof { justify-content: center; }
  .hero-visual { max-width: 540px; margin: 0 auto; }

  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card-lg { grid-column: span 2; }

  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .pricing-card-featured { transform: none; }
  .pricing-card-featured:hover { transform: translateY(-6px); }

  .testimonials-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto 72px; }

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

  .faq-inner { grid-template-columns: 1fr; gap: 40px; }

  .contact-inner { grid-template-columns: 1fr; gap: 48px; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand { grid-column: 1 / -1; }
}

/* Mobile */
@media (max-width: 768px) {
  :root { --section-pad: 60px; }

  /* Nav */
  .nav-links, .nav-actions { display: none; }
  .hamburger { display: flex; }
  .nav-container { gap: 0; justify-content: space-between; }

  /* Hero */
  .hero .container { padding-top: 60px; padding-bottom: 40px; }
  .hero-headline { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-cta-group { flex-direction: column; width: 100%; }
  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-outline { width: 100%; justify-content: center; }

  .float-badge { display: none; }

  /* Features */
  .features-grid { grid-template-columns: 1fr; }
  .feature-card-lg { grid-column: span 1; }

  /* Stats */
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .stat-item { padding: 24px 16px; }
  .stat-big { font-size: 1.8rem; }

  /* FAQ */
  .faq-inner { grid-template-columns: 1fr; }

  /* Contact form */
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 28px 20px; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  /* Back to top */
  .back-to-top { bottom: 20px; right: 20px; }
}

/* Small mobile */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .billing-toggle { flex-direction: column; border-radius: var(--radius-md); }
  .logos-inner { gap: 40px; }
}