/* ===================================
   Competition Planner Landing Page
   Material Design 3 Inspired
   =================================== */

/* CSS Variables - Design Tokens */
:root {
  /* Colors - Matching mobile app theme */
  --primary: #6200ee;
  --primary-light: #7c3aed;
  --primary-dark: #4a00b0;
  --secondary: #03dac6;
  --secondary-dark: #00a896;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6200ee 0%, #7c3aed 50%, #8b5cf6 100%);
  --gradient-hero: linear-gradient(180deg, rgba(98, 0, 238, 0.05) 0%, rgba(255, 255, 255, 1) 100%);

  /* Neutrals */
  --surface: #ffffff;
  --background: #f5f5f5;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;

  /* Shadows - Material Design */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-purple: 0 10px 25px rgba(98, 0, 238, 0.2);

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  --spacing-2xl: 120px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --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: 1.5rem;     /* 24px */
  --font-size-2xl: 2rem;      /* 32px */
  --font-size-3xl: 3rem;      /* 48px */
  --font-size-4xl: 3.5rem;    /* 56px */

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   Reset & Base Styles
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ===================================
   Accessibility
   =================================== */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 8px 16px;
  z-index: 100;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 0;
}

/* ===================================
   Layout System
   =================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

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

/* ===================================
   Header & Navigation
   =================================== */

.header {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: var(--surface);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.header.sticky {
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.95);
}

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

.nav-brand .logo {
  height: 40px;
  width: auto;
}

.nav-menu {
  display: none;
  gap: var(--spacing-md);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--font-size-base);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
}

.nav-link:hover {
  color: var(--primary);
  background-color: rgba(98, 0, 238, 0.05);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  padding: 0;
  z-index: 1001;
}

.hamburger {
  width: 100%;
  height: 3px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-menu-btn:hover .hamburger {
  background-color: var(--primary);
}

/* Mobile Menu Active State */
.nav-menu.active {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  right: 0;
  width: 70%;
  max-width: 300px;
  height: 100vh;
  background-color: var(--surface);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-xl) var(--spacing-md);
  transform: translateX(0);
  animation: slideIn var(--transition-normal);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

/* ===================================
   Hero Section
   =================================== */

.hero {
  background: var(--gradient-hero);
  padding: var(--spacing-xl) 0;
  min-height: 600px;
  display: flex;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
  text-align: center;
}

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

.hero-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.hero-image {
  width: 100%;
  display: flex;
  justify-content: center;
}

.device-mockup {
  position: relative;
  width: 250px;
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-purple);
  padding: var(--spacing-md);
}

.mockup-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-md);
}

/* ===================================
   Buttons
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-icon {
  flex-shrink: 0;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(98, 0, 238, 0.3);
}

.btn-outlined {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outlined:hover {
  background-color: rgba(98, 0, 238, 0.05);
  transform: translateY(-2px);
}

.btn-outlined-white {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-outlined-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.btn-text {
  color: var(--primary);
  padding: 12px 16px;
}

.btn-text:hover {
  background-color: rgba(98, 0, 238, 0.05);
}

.btn-large {
  padding: 16px 40px;
  font-size: var(--font-size-lg);
}

/* ===================================
   Features Section
   =================================== */

.features {
  background-color: var(--surface);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.feature-card {
  text-align: center;
  padding: var(--spacing-lg);
}

.feature-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(98, 0, 238, 0.1), rgba(124, 58, 237, 0.1));
  border-radius: var(--radius-lg);
}

.feature-icon svg {
  stroke: var(--primary);
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.feature-desc {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================
   How It Works Section
   =================================== */

.how-it-works {
  background-color: var(--background);
}

.steps-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.step {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  background: var(--surface);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.step-number {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: white;
  font-size: var(--font-size-xl);
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-purple);
}

.step-content {
  flex: 1;
}

.step-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.step-desc {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
}

.step-arrow {
  display: none;
  font-size: var(--font-size-2xl);
  color: var(--primary);
  text-align: center;
  margin: 0 var(--spacing-sm);
}

/* ===================================
   Demo/Screenshots Section
   =================================== */

.demo {
  background-color: var(--surface);
}

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

.carousel {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-track {
  display: flex;
  transition: transform var(--transition-slow);
}

.carousel-slide {
  min-width: 100%;
  display: flex;
  justify-content: center;
  padding: var(--spacing-lg);
}

.screenshot-placeholder {
  background: var(--background);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  min-height: 400px;
  box-shadow: var(--shadow-md);
}

.screenshot-placeholder svg {
  stroke: var(--primary);
  opacity: 0.5;
}

.screenshot-placeholder p {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.screenshot-placeholder span {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.carousel-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

.carousel-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.carousel-btn:hover svg {
  stroke: white;
}

.carousel-btn svg {
  stroke: var(--text-primary);
  transition: stroke var(--transition-normal);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--border);
  transition: all var(--transition-normal);
}

.dot.active {
  width: 30px;
  background-color: var(--primary);
}

.dot:hover {
  background-color: var(--primary-light);
}

/* ===================================
   CTA Section
   =================================== */

.cta-section {
  background: var(--gradient-primary);
  color: white;
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.cta-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  justify-content: center;
  align-items: center;
}

/* ===================================
   Footer
   =================================== */

.footer {
  background-color: var(--text-primary);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-logo {
  height: 40px;
  width: auto;
  margin-bottom: var(--spacing-sm);
  filter: brightness(0) invert(1);
}

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

.footer-copyright {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.5);
}

.footer-heading {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-normal);
}

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

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

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-slow);
}

.animate-on-scroll.fade-in {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================
   Responsive Design - Tablet
   =================================== */

@media (min-width: 768px) {
  /* Typography scaling */
  .hero-title {
    font-size: var(--font-size-3xl);
  }

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

  /* Navigation */
  .mobile-menu-btn {
    display: none;
  }

  .nav-menu {
    display: flex;
    flex-direction: row;
  }

  /* Hero */
  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }

  .device-mockup {
    width: 300px;
    height: 300px;
  }

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

  /* Steps */
  .steps-container {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .step {
    flex-direction: column;
    text-align: center;
    max-width: 200px;
  }

  .step-arrow {
    display: block;
  }

  /* CTA */
  .cta-buttons {
    flex-direction: row;
  }

  /* Footer */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Carousel */
  .carousel-slide {
    padding: var(--spacing-lg) var(--spacing-2xl);
  }
}

/* ===================================
   Responsive Design - Desktop
   =================================== */

@media (min-width: 1024px) {
  /* Container */
  .container {
    padding: 0 var(--spacing-lg);
  }

  /* Typography scaling */
  .hero-title {
    font-size: var(--font-size-4xl);
  }

  /* Hero Layout */
  .hero {
    min-height: 700px;
  }

  .hero-content {
    flex-direction: row;
    text-align: left;
    justify-content: space-between;
  }

  .hero-text {
    max-width: 50%;
  }

  .hero-cta {
    justify-content: flex-start;
  }

  .device-mockup {
    width: 400px;
    height: 400px;
  }

  /* Features Grid */
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Steps */
  .steps-container {
    flex-wrap: nowrap;
  }

  /* Footer */
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* ===================================
   Responsive Design - Large Desktop
   =================================== */

@media (min-width: 1440px) {
  .container {
    max-width: 1400px;
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }
}

/* ===================================
   Print Styles
   =================================== */

@media print {
  .header,
  .footer,
  .carousel-controls,
  .btn {
    display: none;
  }

  .section {
    page-break-inside: avoid;
  }
}