/* === TapSend Landing Page — Nothing Design v3.0.0 === */
/* Light Mode — Desktop First, Mobile Responsive */
/* Independent from app.css */

/* === FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;700&family=Space+Mono:wght@400;700&display=swap');
.title-highlight {
    color: var(--danger, #dc2626);
    background: rgba(220, 38, 38, 0.1);
    padding: 0 8px;
    border-radius: 4px;
}

.title-danger {
    color: #dc2626;
    font-weight: 700;
}

.warning-box {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.warning-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.hero-solution {
    background: #ecfdf5;
    padding: 16px 20px;
    border-radius: 8px;
    border-left: 4px solid #10b981;
}
/* === CSS VARIABLES === */
:root {
  /* Light Mode Colors */
  --black: #000000;
  --surface: #F5F5F5;
  --surface-raised: #FFFFFF;
  --border: #E8E8E8;
  --border-visible: #CCCCCC;
  
  --text-disabled: #999999;
  --text-secondary: #666666;
  --text-primary: #1A1A1A;
  --text-display: #000000;
  
  --accent: #D71921;
  --accent-hover: #B5151C;
  --success: #4A9E5C;
  --warning: #D4A843;
  --interactive: #007AFF;
  
  /* Type Scale */
  --display-xl: 72px;
  --display-lg: 48px;
  --display-md: 36px;
  --heading: 24px;
  --subheading: 18px;
  --body: 16px;
  --body-sm: 14px;
  --caption: 12px;
  --label: 11px;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  
  /* Border Radius */
  --radius-card: 12px;
  --radius-button: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Space Grotesk', 'DM Sans', system-ui, sans-serif;
  font-size: var(--body);
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === TYPOGRAPHY === */
.label {
  font-family: 'Space Mono', 'JetBrains Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.heading-xl {
  font-size: var(--display-xl);
  line-height: 1.0;
  letter-spacing: -0.03em;
  font-weight: 700;
  color: var(--text-display);
}

.heading-lg {
  font-size: var(--display-lg);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text-display);
}

.heading-md {
  font-size: var(--display-md);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text-display);
}

.heading-sm {
  font-size: var(--heading);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 500;
  color: var(--text-display);
}

.body-text {
  font-size: var(--body);
  line-height: 1.5;
  color: var(--text-secondary);
}

.caption {
  font-size: var(--caption);
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--text-disabled);
}

.mono {
  font-family: 'Space Mono', monospace;
}

/* === LAYOUT === */
.landing-page {
  max-width: 1400px;
  margin: 0 auto;
  background: var(--surface-raised);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all 0.3s ease-out;
}

.nav.scrolled {
  height: 64px;
  box-shadow: 0 1px 0 var(--border);
}

.nav-container {
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Space Mono', monospace;
  font-size: var(--heading);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-display);
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.nav-link {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease-out;
}

.nav-link:hover {
  color: var(--text-display);
}

.nav-cta {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--black);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-button);
  text-decoration: none;
  transition: background 0.2s ease-out;
  border: none;
  cursor: pointer;
}

.nav-cta:hover {
  background: #333;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-display);
}

/* Mobile Menu Drawer */
.mobile-menu-drawer {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.3s ease, opacity 0.3s ease;
}

.mobile-menu-drawer.active {
  visibility: visible;
  opacity: 1;
}

.mobile-menu-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.mobile-menu-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 100%;
  background: var(--surface-raised);
  transform: translateX(100%);
  transition: transform 0.3s ease-out;
  display: flex;
  flex-direction: column;
}

.mobile-menu-drawer.active .mobile-menu-content {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--space-xl);
  border-bottom: 1px solid var(--border);
}

.mobile-menu-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-display);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  gap: var(--space-md);
}

.mobile-nav-link {
  font-family: 'Space Mono', monospace;
  font-size: var(--body);
  color: var(--text-primary);
  text-decoration: none;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.15s ease-out;
}

.mobile-nav-link:hover {
  color: var(--black);
}

.mobile-nav-cta {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--black);
  color: white;
  padding: 16px 24px;
  border-radius: var(--radius-button);
  text-decoration: none;
  text-align: center;
  margin-top: var(--space-md);
  transition: background 0.2s ease-out;
}

.mobile-nav-cta:hover {
  background: #333;
}

/* === HERO SECTION === */
.hero {
  padding: 140px 0 var(--space-4xl);
  background: var(--surface-raised);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border-visible) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.3;
  animation: gridPulse 8s ease-in-out infinite;
}

@keyframes gridPulse {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 0.4; }
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--black);
  color: white;
  padding: 8px 16px;
  border-radius: var(--radius-button);
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xl);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-size: var(--display-xl);
  line-height: 1.0;
  letter-spacing: -0.03em;
  font-weight: 700;
  color: var(--text-display);
  margin-bottom: var(--space-lg);
}

.hero-subtitle {
  font-size: var(--subheading);
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
}

.btn-primary {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--black);
  color: white;
  padding: 16px 32px;
  border-radius: var(--radius-button);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease-out;
}

.btn-primary:hover {
  background: #333;
  transform: translateY(-2px);
}

.btn-secondary {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: transparent;
  color: var(--text-primary);
  padding: 16px 32px;
  border-radius: var(--radius-button);
  text-decoration: none;
  border: 1px solid var(--border-visible);
  cursor: pointer;
  transition: all 0.2s ease-out;
}

.btn-secondary:hover {
  border-color: var(--black);
  transform: translateY(-2px);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-phone {
  width: 280px;
  height: 520px;
  background: var(--black);
  border-radius: 40px;
  padding: 12px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.15);
  transform: rotate(-5deg);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: rotate(-5deg) translateY(0); }
  50% { transform: rotate(-3deg) translateY(-15px); }
}

.hero-phone-screen {
  width: 100%;
  height: 100%;
  background: var(--surface-raised);
  border-radius: 32px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.phone-header {
  height: 56px;
  background: var(--surface-raised);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-logo {
  font-family: 'Space Mono', monospace;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.phone-content {
  flex: 1;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.phone-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 16px;
}

.phone-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.phone-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-icon svg {
  width: 16px;
  height: 16px;
  color: white;
}

.phone-card-title {
  font-size: 14px;
  font-weight: 500;
}

.phone-card-amount {
  font-family: 'Space Mono', monospace;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-display);
}

/* === WHAT IS IT SECTION === */
.what-is {
  padding: var(--space-4xl) 0;
  background: var(--surface);
  position: relative;
}

.what-is-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border) 0.5px, transparent 0.5px);
  background-size: 12px 12px;
  opacity: 0.5;
}

.what-is-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.section-label {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--display-lg);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text-display);
  margin-bottom: var(--space-lg);
}

.section-desc {
  font-size: var(--subheading);
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.stat-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-xl);
  transition: all 0.3s ease-out;
}

.stat-card:hover {
  border-color: var(--border-visible);
  transform: translateY(-4px);
}

.stat-value {
  font-family: 'Space Mono', monospace;
  font-size: var(--display-md);
  font-weight: 700;
  color: var(--text-display);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

/* === WHY CHOOSE US SECTION === */
.why-choose {
  padding: var(--space-4xl) 0;
  background: var(--surface-raised);
}

.why-choose-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.why-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.why-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-2xl);
  transition: all 0.3s ease-out;
}

.why-card:hover {
  border-color: var(--black);
  transform: translateY(-8px);
}

.why-icon {
  width: 48px;
  height: 48px;
  background: var(--black);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.why-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.why-title {
  font-size: var(--subheading);
  font-weight: 500;
  color: var(--text-display);
  margin-bottom: var(--space-sm);
}

.why-desc {
  font-size: var(--body-sm);
  line-height: 1.5;
  color: var(--text-secondary);
}

/* === FEATURES SECTION === */
.features {
  padding: var(--space-4xl) 0;
  background: var(--surface);
}

.features-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.features-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all 0.3s ease-out;
}

.feature-card:hover {
  border-color: var(--black);
  transform: translateY(-8px);
}

.feature-visual {
  height: 160px;
  background: linear-gradient(135deg, var(--surface) 0%, var(--border) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.feature-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border-visible) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: 0.3;
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--black);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

.feature-content {
  padding: var(--space-xl);
}

.feature-title {
  font-size: var(--heading);
  font-weight: 500;
  color: var(--text-display);
  margin-bottom: var(--space-sm);
}

.feature-desc {
  font-size: var(--body-sm);
  line-height: 1.5;
  color: var(--text-secondary);
}

/* === FOOTER === */
.footer {
  padding: var(--space-4xl) 0 var(--space-2xl);
  background: var(--black);
  color: var(--surface);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-4xl);
  margin-bottom: var(--space-4xl);
}

.footer-brand {
  font-family: 'Space Mono', monospace;
  font-size: var(--display-md);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: white;
  margin-bottom: var(--space-md);
}

.footer-tagline {
  font-size: var(--body-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-title {
  font-family: 'Space Mono', monospace;
  font-size: var(--label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: white;
  margin-bottom: var(--space-lg);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: var(--body-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease-out;
}

.footer-link:hover {
  color: white;
}

.footer-bottom {
  padding-top: var(--space-2xl);
  border-top: 1px solid #333;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-family: 'Space Mono', monospace;
  font-size: var(--caption);
  color: var(--text-secondary);
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal-link {
  font-size: var(--caption);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease-out;
}

.footer-legal-link:hover {
  color: white;
}

/* === MOBILE RESPONSIVE === */
@media (max-width: 1024px) {
  :root {
    --display-xl: 56px;
    --display-lg: 40px;
    --display-md: 32px;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }
  
  .hero-visual {
    order: -1;
    height: 400px;
  }
  
  .what-is-content {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }
  
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
  }
}

@media (max-width: 768px) {
  :root {
    --display-xl: 40px;
    --display-lg: 32px;
    --display-md: 28px;
    --heading: 20px;
  }
  
  .nav {
    height: 64px;
  }
  
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
  }
  
  .hero {
    padding: 100px 0 var(--space-3xl);
    text-align: center;
  }
  
  .hero-subtitle {
    max-width: 100%;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
    text-align: center;
  }
  
  .hero-phone {
    width: 240px;
    height: 460px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .why-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* === ANIMATIONS === */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }