/* ========================================
   Stay Uplifted - Responsive CSS
   Mobile-First 2025 Design
   ======================================== */

/* ========================================
   Navigation - Mobile First
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-4) 0;
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.logo-img {
  height: 40px;
  width: auto;
  border-radius: var(--radius-md);
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

/* Mobile Navigation */
.nav-menu {
  position: fixed;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border-light);
  padding: var(--space-6) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

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

.nav-link {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  padding: var(--space-3) 0;
  text-decoration: none;
  transition: color var(--transition-fast);
  text-align: center;
}

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

/* Hamburger Menu */
.nav-toggle {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  padding: var(--space-2);
  z-index: var(--z-modal);
}

.bar {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 2px 0;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
}

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

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

.nav-toggle.active .bar:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ========================================
   Hero Section - Mobile First
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-20) 0 var(--space-16);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.gradient-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
}

.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

.floating-element {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.1) 0%, transparent 70%);
  animation: float 20s infinite linear;
}

.floating-element:nth-child(1) {
  top: 10%;
  left: -10%;
  animation-delay: 0s;
}

.floating-element:nth-child(2) {
  top: 60%;
  right: -15%;
  animation-delay: -7s;
  background: radial-gradient(circle, rgba(139, 90, 60, 0.1) 0%, transparent 70%);
}

.floating-element:nth-child(3) {
  bottom: 20%;
  left: 60%;
  animation-delay: -14s;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
}

.hero-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  text-align: center;
}

.hero-content {
  padding-top: var(--space-12);
  flex: 1;
  max-width: 700px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  backdrop-filter: blur(10px);
}

.hero-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  margin-bottom: var(--space-6);
  color: var(--text-primary);
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.6;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.stat {
  text-align: center;
  min-width: 80px;
}

.stat-number {
  display: block;
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: var(--font-weight-medium);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

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

.phone-mockup {
  position: relative;
  width: 200px;
  height: 400px;
  max-width: 100%;
}

.phone-screen {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
}

.phone-frame {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-2xl);
  pointer-events: none;
}

.floating-ui-elements {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.ui-element {
  position: absolute;
  padding: var(--space-2) var(--space-3);
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  animation: float-ui 6s ease-in-out infinite;
}

.ui-element-1 {
  top: 20%;
  left: -10%;
  animation-delay: 0s;
}

.ui-element-2 {
  top: 45%;
  right: -10%;
  animation-delay: -2s;
}

.ui-element-3 {
  bottom: 25%;
  left: -8%;
  animation-delay: -4s;
}

/* ========================================
   Features Section - Mobile First
   ======================================== */

.features {
  padding: var(--space-20) 0;
  background: var(--background-alt);
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.feature-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: transform var(--transition-normal);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
}

.feature-title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.feature-highlight {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--primary-dark);
}

/* ========================================
   Tablet Responsive (768px+)
   ======================================== */

@media (min-width: 768px) {
  /* Navigation */
  .nav-container {
    padding: 0 var(--space-6);
  }
  
  .nav-toggle {
    display: none;
  }
  
  .nav-menu {
    position: static;
    flex-direction: row;
    background: transparent;
    border: none;
    padding: 0;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
  }
  
  .nav-link {
    font-size: var(--text-base);
    padding: var(--space-2) var(--space-4);
  }
  
  /* Hero */
  .hero-container {
    padding-top: var(--space-12);
    flex-direction: row;
    text-align: left;
    gap: var(--space-16);
  }
  
  .hero-content {
    max-width: none;
    margin: 0;
    flex: 1.2;
  }
  
  .hero-visual {
    flex: 0.8;
  }
  
  .hero-title {
    font-size: var(--text-5xl);
  }
  
  .hero-cta {
    flex-direction: row;
    justify-content: flex-start;
  }
  
  .hero-stats {
    justify-content: flex-start;
  }
  
  .phone-mockup {
    width: 240px;
    height: 480px;
  }
  
  /* Features */
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
}

/* ========================================
   Desktop Responsive (1024px+)
   ======================================== */

@media (min-width: 1024px) {
  /* Container */
  .nav-container,
  .hero-container,
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
  
  .hero-container {
    padding-top: var(--space-16);
  }
  
  /* Hero */
  .hero-title {
    font-size: var(--text-6xl);
  }
  
  .hero-description {
    font-size: var(--text-xl);
  }
  
  .phone-mockup {
    width: 280px;
    height: 560px;
  }
  
  /* Features */
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  /* Section headers */
  .section-title {
    font-size: var(--text-5xl);
  }
}

/* ========================================
   Large Desktop (1200px+)
   ======================================== */

@media (min-width: 1200px) {
  .hero-container {
    padding-top: var(--space-16);
    gap: var(--space-24);
  }
  
  .phone-mockup {
    width: 320px;
    height: 640px;
  }
  
  .ui-element-1 {
    left: -20%;
  }
  
  .ui-element-2 {
    right: -15%;
  }
  
  .ui-element-3 {
    left: -15%;
  }
}

/* Large Desktop (1920px+) - Perfect spacing */
@media (min-width: 1920px) {
  .hero-container {
    padding-top: var(--space-24);
  }
}

/* ========================================
   Animations
   ======================================== */

@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  33% { transform: translateY(-30px) rotate(120deg); }
  66% { transform: translateY(-60px) rotate(240deg); }
  100% { transform: translateY(0px) rotate(360deg); }
}

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

/* ========================================
   High Contrast Mode Support
   ======================================== */

@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --border-light: #333333;
    --text-secondary: #000000;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  }
}