/* ============================================
   CleverFox Landing Page — Design System
   ============================================ */

/* Font loaded via <link> in HTML for better performance */

/* --- CSS Variables --- */
:root {
  --primary: #3B82F6;
  --primary-rgb: 59, 130, 246;
  --secondary: #1E40AF;
  --secondary-rgb: 30, 64, 175;
  --accent: #38BDF8;
  --accent-rgb: 56, 189, 248;
  --bg: #F8FAFC;
  --card: #ffffff;
  --text-dark: #0F172A;
  --text-mid: #475569;
  --text-light: #94A3B8;
  --border: #E2E8F0;
  --success: #22C55E;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.15);
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--secondary);
}

.logo-icon {
  display: none; /* Deprecated */
}

.logo-icon-img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  font-size: .95rem;
  color: var(--text-mid);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}

.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: var(--primary) !important;
  color: white !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  font-size: .9rem;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(var(--primary-rgb),.3);
}

.nav-cta:hover {
  background: var(--secondary) !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(var(--primary-rgb),.4);
}

.nav-cta::after { display: none !important; }

/* Hamburger menu button */
.mobile-toggle {
  display: none;
  background: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  z-index: 1001;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

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

.hero::before {
  content: '';
  position: absolute;
  top: -50%; right: -30%;
  width: 900px; height: 900px;
  background: radial-gradient(circle, rgba(var(--primary-rgb),.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -40%; left: -20%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(var(--accent-rgb),.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0,0); }
  50% { transform: translate(30px, -40px); }
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
  max-width: 580px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(var(--primary-rgb),.08);
  color: var(--primary);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(var(--primary-rgb),.15);
}

.hero-badge .dot {
  width: 8px; height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}

.hero h1 {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.03em;
  margin-bottom: 20px;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 36px;
}

/* Email Form */
.email-form {
  display: flex;
  margin: 32px auto 20px;
  max-width: 440px;
}

.email-input-wrapper {
  flex: 1;
  position: relative;
}

.email-input-wrapper svg {
  position: absolute;
  left: 16px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  width: 20px; height: 20px;
}

.email-form input {
  width: 100%;
  padding: 16px 16px 16px 48px;
  border: 2px solid var(--border);
  border-radius: 14px;
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
  background: white;
}

.email-form input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb),.1);
}

.email-form input::placeholder { color: var(--text-light); }

.btn-primary {
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 14px;
  white-space: nowrap;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(var(--primary-rgb),.35);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  transition: .5s;
}

.btn-primary:hover::before { left: 100%; }

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(var(--primary-rgb),.45);
}

.email-success {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 16px 24px;
  background: rgba(34,197,94,.08);
  border: 1px solid rgba(34,197,94,.2);
  border-radius: 14px;
  color: var(--success);
  font-weight: 600;
  animation: slideUp .4s ease;
}

.email-success.show { display: flex; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stat h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}

.stat p {
  font-size: .85rem;
  color: var(--text-light);
  margin-bottom: 0;
}

/* Hero visual */
.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  position: relative;
}

.phone-mockup {
  width: 300px;
  border-radius: 36px;
  box-shadow: var(--shadow-xl);
  transform: perspective(1000px) rotateY(-8deg) rotateX(4deg);
  transition: var(--transition);
  animation: heroFloat 6s ease-in-out infinite;
}

.phone-mockup:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.02);
}

@keyframes heroFloat {
  0%, 100% { transform: perspective(1000px) rotateY(-8deg) rotateX(4deg) translateY(0); }
  50% { transform: perspective(1000px) rotateY(-8deg) rotateX(4deg) translateY(-15px); }
}

/* Floating decorative elements around phone */
.float-element {
  position: absolute;
  background: white;
  border-radius: 16px;
  padding: 14px 20px;
  box-shadow: var(--shadow-md);
  font-size: .85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: floatBounce 4s ease-in-out infinite;
}

.float-element:nth-child(2) {
  top: 15%; right: -10%;
  animation-delay: 0s;
}

.float-element:nth-child(3) {
  bottom: 20%; left: -5%;
  animation-delay: 1.5s;
}

@keyframes floatBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.float-element .icon {
  width: 32px; height: 32px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.float-element .icon.green { background: rgba(34,197,94,.1); color: var(--success); }
.float-element .icon.blue { background: rgba(var(--primary-rgb),.1); color: var(--primary); }

/* ============================================
   SECTION COMMON
   ============================================ */
.section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-mid);
  line-height: 1.7;
}

/* ============================================
   SURVEYS SECTION
   ============================================ */
.surveys-section {
  background: linear-gradient(180deg, var(--bg) 0%, #EFF6FF 100%);
}

.surveys-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.survey-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.survey-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.survey-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.survey-card h3 .emoji {
  font-size: 1.5rem;
}

.survey-card .subtitle {
  color: var(--text-light);
  font-size: .9rem;
  margin-bottom: 28px;
}

/* Survey Form Input */
.surveys-section {
  position: relative;
  overflow: hidden;
}

.stagger-grid-bg {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  display: grid;
  grid-template-columns: repeat(var(--cols, 10), 1fr);
  grid-template-rows: repeat(var(--rows, 10), 1fr);
  opacity: 0.4;
  pointer-events: none;
}

.grid-item {
  width: 100%;
  height: 100%;
  background: rgba(56, 189, 248, 0.03);
  border: 1px solid rgba(56, 189, 248, 0.05);
  transform-origin: center;
}

.container, .section-header, .surveys-grid {
  position: relative;
  z-index: 1;
}

.survey-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.survey-input {
  width: 100%;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
  background: white;
  resize: vertical;
}

.survey-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb),.1);
}

.survey-input::placeholder { color: var(--text-light); }

.survey-btn {
  margin-top: 20px;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  font-weight: 700;
  font-size: .95rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(var(--primary-rgb),.25);
}

.survey-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(var(--primary-rgb),.35);
}

.survey-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}

.survey-thank-you {
  display: none;
  text-align: center;
  padding: 32px;
}

.survey-thank-you.show { display: block; }

.survey-thank-you .check-circle {
  width: 64px; height: 64px;
  background: rgba(34,197,94,.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
  animation: scaleIn .4s ease;
}

@keyframes scaleIn {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

.survey-thank-you h4 {
  font-size: 1.2rem;
  margin-bottom: 6px;
}

.survey-thank-you p {
  color: var(--text-light);
  font-size: .9rem;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features-section {
  background: white;
}

.feature-row {
  display: flex;
  align-items: center;
  gap: 80px;
  margin-bottom: 100px;
}

.feature-row:last-child { margin-bottom: 0; }

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

.feature-content {
  flex: 1;
}

.feature-icon-box {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-icon-box.blue {
  background: rgba(var(--primary-rgb),.1);
  color: var(--primary);
}

.feature-icon-box.dark-blue {
  background: rgba(var(--secondary-rgb),.1);
  color: var(--secondary);
}

.feature-icon-box.light-blue {
  background: rgba(var(--accent-rgb),.1);
  color: var(--accent);
}

.feature-content h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -.01em;
}

.feature-content p {
  font-size: 1.05rem;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 24px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: var(--text-mid);
}

.feature-list li .check {
  width: 24px; height: 24px;
  background: rgba(34,197,94,.1);
  color: var(--success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  flex-shrink: 0;
}

.feature-image-wrapper {
  flex: 1;
  display: flex;
  justify-content: center;
}

.feature-image-wrapper img {
  width: 320px;
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.feature-image-wrapper img:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-xl);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--text-dark);
  color: rgba(255,255,255,.7);
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.footer-brand .logo { color: white; }
.footer-brand p {
  max-width: 300px;
  font-size: .9rem;
  margin-top: 10px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  font-size: .9rem;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  text-align: center;
  font-size: .85rem;
  color: rgba(255,255,255,.4);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .7s ease, transform .7s ease;
}

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

.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity .7s ease, transform .7s ease;
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity .7s ease, transform .7s ease;
}

.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .hero h1 { font-size: 3rem; }
  .feature-row { gap: 40px; }
  .feature-image-wrapper img { width: 260px; }
}

@media (max-width: 768px) {
  /* --- Mobile Navigation --- */
  .mobile-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    background: white;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    padding: 80px 32px 40px;
    box-shadow: -4px 0 30px rgba(0,0,0,.1);
    transition: right .35s cubic-bezier(.4,0,.2,1);
    z-index: 1000;
  }

  .nav-links.open { right: 0; }

  .nav-links a {
    display: block;
    padding: 16px 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border);
  }

  .nav-links .nav-cta {
    margin-top: 24px;
    text-align: center;
    padding: 14px 24px;
    border-bottom: none;
    border-radius: 14px;
  }

  /* Mobile overlay */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 999;
  }

  .nav-overlay.show { display: block; }

  /* --- Hero Mobile --- */
  .hero { padding-top: 100px; padding-bottom: 40px; min-height: auto; }
  .hero .container { flex-direction: column; text-align: center; gap: 32px; }
  .hero-content { max-width: 100%; }
  .hero h1 { font-size: 2.4rem; line-height: 1.15; }
  .hero p { font-size: 1rem; padding: 0 8px; margin-bottom: 24px; }

  .email-form { flex-direction: column; gap: 12px; max-width: 100%; margin-top: 16px; }
  .btn-primary { width: 100%; text-align: center; padding: 14px 24px; }

  .hero-stats { justify-content: center; gap: 24px; flex-wrap: wrap; margin-top: 28px; padding-top: 24px; }
  .stat h3 { font-size: 1.5rem; }
  .hero-visual { order: -1; margin-top: 10px; }
  .phone-mockup {
    width: 220px;
    transform: none;
    animation: none;
  }
  .float-element { display: none; }

  /* --- Sections Mobile --- */
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
  .section-header h2 { font-size: 1.9rem; }
  .section-header p { padding: 0 8px; font-size: 1rem; }

  /* --- Features Mobile --- */
  .feature-row,
  .feature-row.reverse { flex-direction: column; gap: 32px; margin-bottom: 64px; }
  .feature-image-wrapper img { width: 240px; border-radius: 24px; }
  .feature-content h3 { font-size: 1.4rem; }
  .feature-content p { font-size: 0.95rem; }

  /* --- Surveys Mobile --- */
  .surveys-grid { grid-template-columns: 1fr; gap: 20px; }
  .survey-card { padding: 24px; }
  .survey-card h3 { font-size: 1.15rem; }
  .survey-btn { margin-top: 12px; padding: 12px; font-size: .9rem; }

  /* --- Footer Mobile --- */
  .footer { padding: 40px 0 24px; }
  .footer-content { flex-direction: column; gap: 20px; text-align: center; margin-bottom: 24px; }
  .footer-links { flex-wrap: wrap; justify-content: center; gap: 20px; }
  .footer-brand p { max-width: 100%; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.85rem; }
  .hero p { font-size: .95rem; }
  .hero-stats { flex-direction: column; gap: 12px; align-items: center; }
  .stat h3 { font-size: 1.3rem; }
  .phone-mockup { width: 190px; }
  .section-header h2 { font-size: 1.6rem; }
  .feature-image-wrapper img { width: 200px; }
  .survey-card { padding: 20px; }
  .email-form input { padding: 14px 14px 14px 44px; font-size: .9rem; }
  .btn-primary { font-size: .9rem; padding: 13px 20px; }
}

/* --- Reduce motion for accessibility & battery --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}