/*
 * NearBePySchool.org - Psychology Education Resource
 * Modern Educational Design - Clean, Professional, Trustworthy
 */

/* ============================================
   GOOGLE FONTS
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ============================================
   CSS VARIABLES & ROOT STYLES
   ============================================ */
:root {
  /* Colors - Professional Blue & Teal Palette */
  --primary-main: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;

  --secondary-main: #0891b2;
  --secondary-dark: #0e7490;
  --secondary-light: #06b6d4;

  --accent-main: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fbbf24;

  /* Neutrals */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Text */
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-light: #6b7280;

  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-accent: #eff6ff;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  --line-height-loose: 1.75;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: all 0.15s ease;
  --transition-default: all 0.3s ease;
  --transition-slow: all 0.5s ease;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: var(--line-height-relaxed);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.lead {
  font-size: 1.25rem;
  font-weight: 400;
  line-height: var(--line-height-loose);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

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

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

strong {
  font-weight: 600;
  color: var(--text-primary);
}

ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
}

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

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

section:nth-child(even) {
  background-color: var(--bg-secondary);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--bg-primary);
  box-shadow: var(--shadow-md);
  z-index: 1000;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-main);
}

.logo:hover {
  text-decoration: none;
  color: var(--primary-dark);
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

nav a:hover,
nav a.active {
  color: var(--primary-main);
  background-color: var(--bg-accent);
  text-decoration: none;
}

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

.mobile-menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition-default);
  border-radius: var(--radius-sm);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.95) 0%, rgba(8, 145, 178, 0.90) 100%),
              url('../images/hero-students-classroom.jpg');
  background-size: cover;
  background-position: center;
  color: white;
  margin-top: var(--header-height);
  padding: var(--spacing-2xl) var(--spacing-md);
}

.hero h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero .lead {
  color: rgba(255, 255, 255, 0.95);
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.25rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Content with top margin for pages without hero */
main.with-header-spacing {
  margin-top: var(--header-height);
}

main section:first-child {
  padding-top: calc(var(--spacing-2xl) + var(--spacing-lg));
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-default);
  cursor: pointer;
  border: none;
  text-decoration: none;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--secondary-main);
  color: white;
}

.btn-secondary:hover {
  background-color: var(--secondary-dark);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
  background-color: var(--primary-main);
  color: white;
  text-decoration: none;
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background-color: var(--bg-primary);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition-default);
  height: 100%;
}

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

.card h3 {
  color: var(--primary-main);
  margin-bottom: var(--spacing-sm);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

/* ============================================
   IMAGES
   ============================================ */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

.content-image {
  margin: var(--spacing-xl) 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  background-color: var(--gray-800);
  color: var(--gray-300);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

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

footer h3 {
  color: white;
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}

footer ul {
  list-style: none;
  padding: 0;
}

footer li {
  margin-bottom: var(--spacing-xs);
}

footer a {
  color: #93c5fd;
  text-decoration: none;
}

footer a:hover {
  color: #bfdbfe;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid var(--gray-700);
  padding-top: var(--spacing-md);
  text-align: center;
  color: var(--gray-300);
  font-size: 0.875rem;
}

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.bg-accent {
  background-color: var(--bg-accent);
}

.bg-secondary {
  background-color: var(--bg-secondary);
}

/* ============================================
   404 PAGE
   ============================================ */
.error-page {
  min-height: calc(100vh - var(--header-height) - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.error-page h1 {
  font-size: 6rem;
  color: var(--primary-main);
  margin-bottom: var(--spacing-md);
}

.error-page h2 {
  margin-bottom: var(--spacing-lg);
}

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

/* Tablet */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero {
    min-height: 400px;
  }

  /* Mobile Navigation */
  nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: var(--transition-default);
  }

  nav.active {
    transform: translateX(0);
  }

  nav ul {
    flex-direction: column;
    padding: var(--spacing-md);
    gap: 0;
  }

  nav li {
    width: 100%;
  }

  nav a {
    display: block;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
  }

  .mobile-menu-toggle {
    display: block;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
  }

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

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

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

  footer .container {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

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

  h1 {
    font-size: 1.75rem;
  }

  .hero h1 {
    font-size: 1.875rem;
  }

  .hero {
    min-height: 350px;
  }

  .lead {
    font-size: 1.125rem;
  }

  .error-page h1 {
    font-size: 4rem;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  header,
  footer,
  .mobile-menu-toggle {
    display: none;
  }

  main {
    margin-top: 0;
  }

  .hero {
    margin-top: 0;
    min-height: auto;
    padding: var(--spacing-lg);
  }

  a {
    color: var(--text-primary);
    text-decoration: underline;
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
:focus {
  outline: 2px solid var(--primary-main);
  outline-offset: 2px;
}

.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-main);
  color: white;
  padding: var(--spacing-sm);
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}