/* ========================================
   CampusBodima Landing Page - CSS Design System
   ======================================== */

/* ========== CSS Custom Properties ========== */
:root {
  /* Color Palette */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-secondary: #14b8a6;
  --color-secondary-dark: #0d9488;
  --color-secondary-light: #2dd4bf;

  --color-accent: #06b6d4;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  --color-text-primary: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-light: #9ca3af;
  --color-text-white: #ffffff;

  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;
  --color-bg-dark: #111827;

  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --gradient-hero: linear-gradient(135deg, #2563eb 0%, #14b8a6 100%);
  --gradient-overlay: linear-gradient(180deg, rgba(37, 99, 235, 0.05) 0%, rgba(20, 184, 166, 0.05) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Font Sizes */
  --font-size-xs: 0.75rem;
  /* 12px */
  --font-size-sm: 0.875rem;
  /* 14px */
  --font-size-base: 1rem;
  /* 16px */
  --font-size-lg: 1.125rem;
  /* 18px */
  --font-size-xl: 1.25rem;
  /* 20px */
  --font-size-2xl: 1.5rem;
  /* 24px */
  --font-size-3xl: 1.875rem;
  /* 30px */
  --font-size-4xl: 2.25rem;
  /* 36px */
  --font-size-5xl: 3rem;
  /* 48px */
  --font-size-6xl: 3.75rem;
  /* 60px */

  /* Spacing */
  --spacing-xs: 0.5rem;
  /* 8px */
  --spacing-sm: 0.75rem;
  /* 12px */
  --spacing-md: 1rem;
  /* 16px */
  --spacing-lg: 1.5rem;
  /* 24px */
  --spacing-xl: 2rem;
  /* 32px */
  --spacing-2xl: 3rem;
  /* 48px */
  --spacing-3xl: 4rem;
  /* 64px */
  --spacing-4xl: 6rem;
  /* 96px */
  --spacing-5xl: 8rem;
  /* 128px */

  /* Border Radius */
  --radius-sm: 0.375rem;
  /* 6px */
  --radius-md: 0.5rem;
  /* 8px */
  --radius-lg: 0.75rem;
  /* 12px */
  --radius-xl: 1rem;
  /* 16px */
  --radius-2xl: 1.5rem;
  /* 24px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Container */
  --container-max-width: 1280px;
  --container-padding: var(--spacing-lg);
}

/* ========== Global Styles ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

body.menu-open {
  overflow: hidden;
}

/* Mobile Menu Overlay */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 1090;
  /* Behind nav-menu (1100) but above everything else */
  pointer-events: none;
}

body.menu-open::after {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ========== Typography ========== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

h4 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.text-large {
  font-size: var(--font-size-xl);
  line-height: 1.6;
}

/* ========== Container & Layout ========== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-4xl) 0;
}

.section-alt {
  background-color: var(--color-bg-secondary);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-white);
  box-shadow: var(--shadow-md);
}

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

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

.btn-secondary {
  background: var(--color-bg-primary);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ========== Cards ========== */
.card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-light);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-white);
  font-size: var(--font-size-2xl);
}

.card h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* ========== Grid Layouts ========== */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ========== Navigation ========== */
.navbar {
  background: var(--color-bg-primary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
  transition: box-shadow 0.3s ease;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
}

.logo-icon {
  font-size: var(--font-size-2xl);
}

.logo-icon img {
  height: 45px;
  object-fit: contain;
}

.logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-text-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  transition: color var(--transition-base);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}


.nav-link-cta {
  background: var(--gradient-primary);
  color: var(--color-text-white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-semibold);
}

.nav-link-cta::after {
  display: none;
}

.nav-link-cta:hover {
  color: var(--color-text-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ========== Hero Section ========== */
.hero {
  background: var(--gradient-hero);
  color: var(--color-text-white);
  padding: var(--spacing-5xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  color: var(--color-text-white);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-6xl);
  line-height: 1.1;
}

.hero-text p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  max-width: 500px;
  filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.3));
  animation: float 6s ease-in-out infinite;
  border-radius: var(--radius-2xl);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-20px);
  }
}

/* ========== Section Headers ========== */
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-3xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* ========== Problem Section ========== */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-2xl);
}

.problem-column {
  background: var(--color-bg-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--color-primary);
}

.problem-column h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.problem-column ul {
  list-style: none;
  padding: 0;
}

.problem-column li {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.problem-column li::before {
  content: '✗';
  color: var(--color-error);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

/* ========== Solution Section ========== */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-3xl);
}

.solution-column h3 {
  color: var(--color-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-3xl);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.feature-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.feature-content h4 {
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-lg);
}

.feature-content p {
  margin: 0;
  font-size: var(--font-size-sm);
}

/* ========== How It Works Section ========== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.step {
  text-align: center;
  position: relative;
}

.step::after {
  content: '→';
  position: absolute;
  top: 60px;
  right: -30px;
  font-size: var(--font-size-4xl);
  color: var(--color-secondary);
  font-weight: var(--font-weight-bold);
}

.step:last-child::after {
  display: none;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  color: var(--color-text-white);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  box-shadow: var(--shadow-lg);
}

.step h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.step p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* ========== Screenshots Section ========== */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
}

.screenshot-item {
  background: var(--color-bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}

.screenshot-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.screenshot-item img {
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
}

.screenshot-item h5 {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

/* ========== Benefits Section ========== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-3xl);
}

.benefit-column {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(20, 184, 166, 0.05) 100%);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-2xl);
  border: 2px solid var(--color-border-light);
}

.benefit-column h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-2xl);
}

.benefit-list {
  list-style: none;
  padding: 0;
}

.benefit-list li {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
}

.benefit-list li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

/* ========== Trust Section ========== */
.trust {
  background: var(--gradient-hero);
  color: var(--color-text-white);
  text-align: center;
}

.trust h2 {
  color: var(--color-text-white);
  margin-bottom: var(--spacing-2xl);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.stat {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-base);
}

.stat:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px);
}

.stat-icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
}

.stat-number {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-white);
  margin-bottom: var(--spacing-xs);
  display: block;
}

.stat-label {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
}

/* ========== Final CTA Section ========== */
.final-cta {
  text-align: center;
  background: var(--gradient-overlay);
}

.final-cta h2 {
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-5xl);
}

.app-store-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-top: var(--spacing-2xl);
}

.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--color-bg-dark);
  color: var(--color-text-white);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}

.app-store-btn:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
  background: var(--color-text-primary);
}

.app-store-btn img {
  width: 32px;
  height: 32px;
}

.app-store-btn .store-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.app-store-btn .store-text small {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

.app-store-btn .store-text span {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

/* ========== Footer ========== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand h3 {
  color: var(--color-text-white);
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-lg);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  text-decoration: none;
  transition: all var(--transition-base);
}

.social-link:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
}

.footer-links h4 {
  color: var(--color-text-white);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-md);
}

.footer-links ul {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-base);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* ========== Animations ========== */
.card,
.feature-item,
.step,
.screenshot-item,
.stat,
.problem-column,
.benefit-column {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.1s, transform 0.1s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

/* ========== Responsive Design ========== */
@media (max-width: 1024px) {
  :root {
    --font-size-6xl: 3rem;
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --spacing-4xl: 4rem;
    --spacing-5xl: 5rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-cta {
    justify-content: center;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .navbar {
    z-index: 1100;
    /* Ensure above overlay (1090) */
    backdrop-filter: none;
    /* Prevent containing block creation for fixed children */
    transform: none;
    /* Ensure no transform creates a containing block */
  }

  /* Mobile Navigation */
  .nav-toggle {
    display: flex;
    z-index: 1200;
    position: relative;
  }

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

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

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

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    height: 100vh;
    /* Fallback */
    height: 100dvh;
    width: 280px;
    max-width: 85vw;
    background: #ffffff;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(100%);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 1100;
    padding: var(--spacing-xl);
    padding-top: 80px;
    overflow-y: auto;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
  }

  .nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
    display: flex;
  }

  /* Overlay handled by body::after */
  .nav-menu::before {
    display: none;
  }

  .nav-menu .nav-link {
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    padding: var(--spacing-md) 0;
    font-weight: var(--font-weight-semibold);
    border-bottom: 1px solid var(--color-border-light);
    width: 100%;
    text-align: left;
  }

  .nav-menu .nav-link:last-child {
    border-bottom: none;
  }

  .nav-menu .nav-link::after {
    display: none;
  }

  /* Removed old overlay styles */

  body.menu-open {
    overflow: hidden;
  }

  :root {
    --font-size-6xl: 2rem;
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.25rem;
    --spacing-3xl: 2rem;
    --spacing-4xl: 2.5rem;
    --spacing-5xl: 3rem;
    --container-padding: var(--spacing-md);
  }

  .section {
    padding: var(--spacing-3xl) 0;
  }

  .hero {
    padding: var(--spacing-3xl) 0 var(--spacing-4xl);
  }

  .hero-content {
    gap: var(--spacing-2xl);
  }

  .hero-text h1 {
    font-size: var(--font-size-4xl);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
  }

  .hero-text p {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xl);
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
  }

  .hero-image img {
    max-width: 100%;
    width: 100%;
  }

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

  .app-store-btn {
    width: 100%;
    justify-content: center;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .problem-grid,
  .solution-grid,
  .benefits-grid,
  .stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .steps {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .step::after {
    content: '↓';
    top: auto;
    bottom: -24px;
    right: 50%;
    transform: translateX(50%);
  }

  .screenshots-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .screenshot-item {
    padding: var(--spacing-md);
  }

  .section-header {
    margin-bottom: var(--spacing-2xl);
  }

  .section-header h2 {
    font-size: var(--font-size-3xl);
  }

  .section-header p {
    font-size: var(--font-size-base);
  }

  .problem-column,
  .benefit-column {
    padding: var(--spacing-lg);
  }

  .problem-column h3,
  .benefit-column h3 {
    font-size: var(--font-size-xl);
  }

  .solution-column h3 {
    font-size: var(--font-size-2xl);
  }

  .feature-item {
    padding: var(--spacing-md);
  }

  .stat {
    padding: var(--spacing-lg);
  }

  .stat-number {
    font-size: var(--font-size-4xl);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }

  .footer-links ul {
    text-align: center;
  }

  .app-store-buttons {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .final-cta h2 {
    font-size: var(--font-size-3xl);
  }

  .text-large {
    font-size: var(--font-size-base);
  }
}

/* Extra small devices (390px and below) */
@media (max-width: 390px) {
  :root {
    --font-size-6xl: 1.75rem;
    --font-size-5xl: 1.5rem;
    --font-size-4xl: 1.375rem;
    --font-size-3xl: 1.125rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 1.75rem;
    --spacing-4xl: 2rem;
    --spacing-5xl: 2.5rem;
    --container-padding: var(--spacing-sm);
  }

  .hero-text h1 {
    font-size: var(--font-size-3xl);
  }

  .section-header h2 {
    font-size: var(--font-size-2xl);
  }

  .app-store-btn {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .app-store-btn img,
  .app-store-btn svg {
    width: 24px;
    height: 24px;
  }

  .app-store-btn .store-text small {
    font-size: 0.625rem;
  }

  .app-store-btn .store-text span {
    font-size: var(--font-size-base);
  }

  .stat-number {
    font-size: var(--font-size-3xl);
  }

  .step-number {
    width: 60px;
    height: 60px;
    font-size: var(--font-size-2xl);
  }

  .card-icon,
  .feature-icon {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-lg);
  }
}

/* ========== Utility Classes ========== */
.text-center {
  text-align: center;
}

.text-primary {
  color: var(--color-primary);
}

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

.bg-gradient {
  background: var(--gradient-primary);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.mb-2xl {
  margin-bottom: var(--spacing-2xl);
}

.mt-0 {
  margin-top: 0;
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mt-2xl {
  margin-top: var(--spacing-2xl);
}

/* ========== Coming Soon Modal ========== */
.modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--color-bg-primary);
  padding: var(--spacing-3xl);
  border-radius: var(--radius-2xl);
  max-width: 500px;
  width: 90%;
  position: relative;
  box-shadow: var(--shadow-2xl);
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: var(--font-size-3xl);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color var(--transition-base);
  line-height: 1;
}

.modal-close:hover {
  color: var(--color-text-primary);
}

.modal-body {
  text-align: center;
}

.modal-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
}

.modal-body h2 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}