/* ============================================
   MobiliNantes Website — Stylesheet
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #002300;
  --color-primary-light: #004d00;
  --color-primary-dark: #001100;
  --color-accent: #009949;
  --color-accent-light: #00cc66;
  --color-white: #ffffff;
  --color-off-white: #f8faf8;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --color-text: #1a1a2e;
  --color-text-light: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f0fdf4;
  --color-tram1: #009949;
  --color-tram2: #d9232a;
  --color-tram3: #0072ad;
  --font-primary: 'Kanit', sans-serif;
  --font-secondary: 'Bricolage Grotesque', sans-serif;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent-light);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  line-height: 1.2;
  font-weight: 700;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: all var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
}

.navbar-brand img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

.navbar-brand:hover {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: var(--color-gray-600);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: all var(--transition);
}

.nav-links a:hover {
  color: var(--color-primary);
  background: var(--color-gray-100);
}

.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.nav-cta {
  background: var(--color-primary) !important;
  color: var(--color-white) !important;
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--color-primary-light) !important;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

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

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

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

/* --- Hero Section --- */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(160deg, var(--color-bg-alt) 0%, var(--color-white) 50%, #f0f7ff 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 153, 73, 0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 114, 173, 0.04) 0%, transparent 70%);
  border-radius: 50%;
}

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

.hero-content {
  flex: 1;
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gray-600);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.3); }
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--color-primary);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-accent), var(--color-tram3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text {
  font-size: 1.15rem;
  color: var(--color-text-light);
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}

.store-btn-dark {
  background: var(--color-primary);
  color: var(--color-white);
}

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

.store-btn-outline {
  background: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-gray-200);
}

.store-btn-outline:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--color-primary);
}

.store-btn svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.store-btn .btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.store-btn .btn-text small {
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.8;
}

.store-btn .btn-text strong {
  font-size: 1rem;
}

.hero-stats {
  display: flex;
  gap: 32px;
}

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

.hero-stat .number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-secondary);
}

.hero-stat .label {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-phone {
  width: 280px;
  height: auto;
  border-radius: 32px;
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.05);
  transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
  transition: transform 0.6s ease;
}

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

/* Floating elements around phone */
.hero-float {
  position: absolute;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  animation: float 6s ease-in-out infinite;
}

.hero-float-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.hero-float-1 {
  top: 20px;
  right: -20px;
  animation-delay: 0s;
}

.hero-float-1 .hero-float-icon {
  background: #e8f5e9;
  color: var(--color-tram1);
}

.hero-float-2 {
  bottom: 80px;
  left: -40px;
  animation-delay: -2s;
}

.hero-float-2 .hero-float-icon {
  background: #e3f2fd;
  color: var(--color-tram3);
}

.hero-float-3 {
  bottom: -10px;
  right: -10px;
  animation-delay: -4s;
}

.hero-float-3 .hero-float-icon {
  background: #fff3e0;
  color: #e65100;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* --- Section Common --- */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--color-off-white);
}

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

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  background: var(--color-bg-alt);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

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

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-tram3));
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-icon.green { background: #e8f5e9; color: var(--color-tram1); }
.feature-icon.red { background: #ffebee; color: var(--color-tram2); }
.feature-icon.blue { background: #e3f2fd; color: var(--color-tram3); }
.feature-icon.orange { background: #fff3e0; color: #e65100; }
.feature-icon.purple { background: #f3e5f5; color: #7b1fa2; }
.feature-icon.teal { background: #e0f2f1; color: #00695c; }

.feature-card h3 {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- Screenshots Section --- */
.screenshots-section {
  background: linear-gradient(180deg, var(--color-off-white) 0%, var(--color-white) 100%);
}

.screenshots-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 20px 0 40px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.screenshots-scroll::-webkit-scrollbar {
  display: none;
}

.screenshot-item {
  flex: 0 0 240px;
  scroll-snap-align: center;
  transition: transform var(--transition);
}

.screenshot-item:hover {
  transform: scale(1.03);
}

.screenshot-item img {
  width: 240px;
  height: auto;
  border-radius: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(0, 0, 0, 0.05);
}

/* --- Network Section --- */
.network-section {
  background: var(--color-primary);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.network-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 153, 73, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.network-section .section-label {
  background: rgba(255,255,255,0.1);
  color: var(--color-accent-light);
}

.network-section .section-header h2 {
  color: var(--color-white);
}

.network-section .section-header p {
  color: rgba(255,255,255,0.7);
}

.network-modes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.network-mode {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
  backdrop-filter: blur(10px);
}

.network-mode:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-4px);
}

.network-mode-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.network-mode h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.network-mode p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

/* --- Download CTA --- */
.download-section {
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, #f0f7ff 100%);
}

.download-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 64px;
  text-align: center;
  box-shadow: var(--shadow-xl);
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.download-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-tram1), var(--color-tram2), var(--color-tram3));
}

.download-card h2 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.download-card p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: 64px 0 32px;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.footer-brand span {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
}

.footer-about p {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer h4 {
  color: var(--color-white);
  font-size: 0.95rem;
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--color-gray-400);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-gray-800);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-gray-800);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* --- Static Pages --- */
.page-header {
  padding: 120px 0 48px;
  background: linear-gradient(160deg, var(--color-bg-alt) 0%, var(--color-white) 100%);
  text-align: center;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--color-primary);
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

.page-content {
  padding: 64px 0 100px;
  max-width: 800px;
  margin: 0 auto;
}

.page-content h2 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin: 40px 0 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-gray-200);
}

.page-content h2:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.page-content h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin: 28px 0 12px;
}

.page-content p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 1rem;
}

.page-content ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

.page-content ul li {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 6px;
  font-size: 1rem;
}

.page-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: rgba(0, 153, 73, 0.3);
  text-underline-offset: 3px;
}

.page-content a:hover {
  text-decoration-color: var(--color-accent);
}

.page-content strong {
  color: var(--color-text);
  font-weight: 600;
}

/* --- Contact Form --- */
.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-white);
  transition: all var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 153, 73, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.form-submit:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 16px;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px;
}

.form-success.show {
  display: block;
}

.form-success .check-icon {
  width: 64px;
  height: 64px;
  background: var(--color-bg-alt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  color: var(--color-accent);
}

/* --- FAQ Accordion --- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: var(--color-gray-300);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: var(--color-white);
  border: none;
  cursor: pointer;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: all var(--transition);
}

.faq-question:hover {
  background: var(--color-gray-50);
}

.faq-question .icon {
  font-size: 1.2rem;
  transition: transform var(--transition);
  color: var(--color-gray-400);
}

.faq-item.active .faq-question .icon {
  transform: rotate(45deg);
  color: var(--color-accent);
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--color-text-light);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* --- Help Categories --- */
.help-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.help-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

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

.help-card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.help-card h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.help-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all var(--transition);
  box-shadow: var(--shadow-lg);
  z-index: 900;
}

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

.back-to-top:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

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

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

  .hero-image {
    order: -1;
  }

  .hero-phone {
    width: 220px;
  }

  .hero-float {
    display: none;
  }

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

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

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

  .download-card {
    padding: 48px 32px;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: 88px 24px 32px;
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    transition: right var(--transition);
    z-index: 999;
  }

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

  .nav-links a {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
  }

  .nav-cta {
    text-align: center;
    justify-content: center;
  }

  .hero {
    padding: 110px 0 60px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-text {
    font-size: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .store-btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .hero-stats {
    gap: 20px;
  }

  .section {
    padding: 64px 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .network-modes {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .contact-form {
    padding: 24px;
  }

  .download-card {
    padding: 32px 20px;
  }

  .screenshot-item {
    flex: 0 0 200px;
  }

  .screenshot-item img {
    width: 200px;
  }

  .page-header {
    padding: 100px 0 32px;
  }

  .page-content {
    padding: 40px 0 64px;
  }
}

@media (max-width: 480px) {
  .network-modes {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

  .download-buttons .store-btn {
    width: 100%;
  }
}

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.3);
  z-index: 998;
}

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