/* ==========================================
   SOUTHERN CALIFORNIA ROBOTICS LEAGUE INC
   Main CSS - Design System & Components
   Version: 1.0
   ========================================== */

/* ==========================================
   CSS VARIABLES - Design Tokens
   ========================================== */
:root {
  /* Primary Colors - Robotics Theme */
  --color-primary: #1E3A8A;        /* Deep Blue - technology, reliability */
  --color-secondary: #FF6B35;      /* Electric Orange - energy, innovation */
  --color-accent: #10B981;         /* Bright Green - growth, success */
  
  /* Secondary Colors */
  --color-blue-light: #3B82F6;     /* Light Blue - trust */
  --color-yellow: #FBBF24;         /* Yellow - optimism, creativity */
  
  /* Neutral Colors */
  --color-dark: #1F2937;           /* Dark Gray - primary text */
  --color-gray-700: #374151;
  --color-gray-600: #4B5563;
  --color-gray-500: #6B7280;
  --color-gray-400: #9CA3AF;
  --color-gray-300: #D1D5DB;
  --color-gray-200: #E5E7EB;
  --color-gray-100: #F3F4F6;
  --color-white: #FFFFFF;
  --color-black: #000000;
  
  /* Background Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F3F4F6;
  --bg-dark: #0F172A;
  
  /* Typography */
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Font Sizes - Responsive Scale */
  --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 */
  
  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  --line-height-loose: 1.8;
  
  /* Spacing - 8-point grid system */
  --spacing-1: 0.5rem;    /* 8px */
  --spacing-2: 1rem;      /* 16px */
  --spacing-3: 1.5rem;    /* 24px */
  --spacing-4: 2rem;      /* 32px */
  --spacing-5: 2.5rem;    /* 40px */
  --spacing-6: 3rem;      /* 48px */
  --spacing-7: 3.5rem;    /* 56px */
  --spacing-8: 4rem;      /* 64px */
  --spacing-10: 5rem;     /* 80px */
  --spacing-12: 6rem;     /* 96px */
  --spacing-16: 8rem;     /* 128px */
  
  /* Container */
  --container-max: 1200px;
  --container-padding: var(--spacing-2);
  
  /* Border Radius */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --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);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Breakpoints (for reference in media queries) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  color: var(--color-dark);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-2);
  color: var(--color-dark);
}

h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-3);
}

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

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

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

h5 {
  font-size: var(--font-size-xl);
}

h6 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--spacing-2);
  max-width: 70ch;
}

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

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

strong, b {
  font-weight: var(--font-weight-semibold);
}

/* ==========================================
   LAYOUT & CONTAINERS
   ========================================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.container-fluid {
  width: 100%;
  padding: 0 var(--container-padding);
}

section {
  padding: var(--spacing-10) 0;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  text-decoration: none;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  min-width: 140px;
}

.btn-primary {
  background: var(--color-secondary);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
  background: #E55A2B;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 107, 53, 0.4);
  color: var(--color-white);
}

.btn-secondary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
}

.btn-secondary:hover {
  background: #1e40af;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(30, 58, 138, 0.4);
  color: var(--color-white);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-large {
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-lg);
  min-width: 200px;
}

/* ==========================================
   FORMS
   ========================================== */
.form-group {
  margin-bottom: var(--spacing-3);
}

label {
  display: block;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-1);
  color: var(--color-dark);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-2);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-dark);
  transition: border-color var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

::placeholder {
  color: var(--color-gray-400);
}

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
.header {
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-2) 0;
}

.logo {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
}

.logo span {
  color: var(--color-secondary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-4);
  align-items: center;
}

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
  padding: var(--spacing-1) var(--spacing-2);
  transition: color var(--transition-fast);
}

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

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-1);
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--color-dark);
  margin: 5px 0;
  transition: all var(--transition-fast);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e40af 100%);
  color: var(--color-white);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-background img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-8) var(--spacing-2);
}

.hero h1 {
  color: var(--color-white);
  font-size: var(--font-size-6xl);
  margin-bottom: var(--spacing-3);
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-6);
  max-width: none;
  line-height: var(--line-height-loose);
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-3);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.trust-badges {
  display: flex;
  gap: var(--spacing-6);
  justify-content: center;
  margin-top: var(--spacing-6);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.trust-badge::before {
  content: "✓";
  display: inline-block;
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  border-radius: 50%;
  text-align: center;
  line-height: 24px;
}

/* ==========================================
   SECTION HEADERS
   ========================================== */
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-8);
}

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

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  line-height: var(--line-height-loose);
}

/* ==========================================
   GRID LAYOUTS
   ========================================== */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

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

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

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

/* ==========================================
   CARDS
   ========================================== */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-4);
}

.card-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
}

.card-text {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-3);
}

/* ==========================================
   STATISTICS
   ========================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-6);
  margin: var(--spacing-8) 0;
}

.stat-item {
  text-align: center;
  padding: var(--spacing-4);
}

.stat-number {
  display: block;
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-1);
}

.stat-label {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  font-weight: var(--font-weight-medium);
}

/* ==========================================
   TESTIMONIALS
   ========================================== */
.testimonial {
  background: var(--color-white);
  padding: var(--spacing-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.testimonial-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--spacing-3);
  border: 4px solid var(--color-secondary);
}

.testimonial-quote {
  font-size: var(--font-size-lg);
  font-style: italic;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-3);
  line-height: var(--line-height-loose);
}

.testimonial-author {
  font-weight: var(--font-weight-semibold);
  color: var(--color-dark);
}

.testimonial-role {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
  background: var(--bg-dark);
  color: var(--color-gray-300);
  padding: var(--spacing-10) 0 var(--spacing-4);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-6);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-3);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-2);
}

.footer-links a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-gray-700);
  font-size: var(--font-size-sm);
}

.footer-address {
  margin-top: var(--spacing-2);
  line-height: var(--line-height-loose);
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.bg-gray { background-color: var(--bg-secondary); }
.bg-dark { background-color: var(--bg-dark); color: var(--color-white); }
.bg-primary { background-color: var(--color-primary); color: var(--color-white); }

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

/* Tablet and below */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-6xl: 3rem;
  }
  
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-6xl: 2.5rem;
  }
  
  section {
    padding: var(--spacing-6) 0;
  }
  
  .hero h1 {
    font-size: var(--font-size-5xl);
  }
  
  .hero p {
    font-size: var(--font-size-base);
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-3);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .btn-large {
    width: 100%;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  :root {
    --container-padding: var(--spacing-2);
  }
  
  .hero {
    min-height: 90vh;
  }
  
  .card-content {
    padding: var(--spacing-3);
  }
}