/**
 * Main CSS file for STEM Ground website
 *
 * Implements the Metallic Chic design system as defined in STYLE_GUIDE.md
 */

/* Global Styles */
:root {
  /* Modern Teal & Blue Palette */
  --primary-color: #0093FF; /* Updated primary blue */
  --primary-light: #00E0FF;
  --primary-dark: #0066CC;
  --primary-darker: #004C99;
  --secondary-color: #0066cc;
  --secondary-light: #7a96c5;
  --tertiary-color: #e6b54c;
  --light-accent: #E6F3FF;
  --bg-light: #F0F8FF; /* Updated to match new palette */
  --bg-lighter: #f8fafa; /* Very soft white */

  /* Gradient Colors */
  --gradient-light-start: #e0f5f2;
  --gradient-light-end: #d5e5ff;
  --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-light) 100%);
  --gradient-tertiary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  --gradient-whatsapp: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

  /* Text Colors */
  --text-dark: #3a4a5a; /* Softer than pure black */
  --text-muted: #5d6b7c;
  --text-light: #7d8a98;
  --text-color: var(--text-dark);
  --light-text: #f0f5f5; /* Slightly off-white for better eye comfort */

  /* Status Colors */
  --success-color: #38b2ac;
  --warning-color: #f6ad55;
  --danger-color: #e53e3e;

  /* Border & Shadows */
  --border-light: #e2e8f0;
  --border-accent: #b2f5ea;
  --border-color: var(--border-light);
  --shadow-xs: 0 1px 3px rgba(42, 157, 143, 0.05);
  --shadow-sm: 0 2px 8px rgba(42, 157, 143, 0.07);
  --shadow-md: 0 4px 16px rgba(42, 157, 143, 0.1);
  --shadow-lg: 0 8px 24px rgba(42, 157, 143, 0.15);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Transitions */
  --transition: all 0.3s ease;
}

/* Typography */
@import url('https://fonts.googleapis.com/css2?family=Abril+Fatface&family=Lato:wght@300;400;700&display=swap');

/* Font Family Variables */
:root {
  --font-heading: 'Abril Fatface', serif;
  --font-body: 'Lato', sans-serif;
}

body {
  font-family: var(--font-body);
  color: var(--text-dark);
  line-height: 1.6;
  background-color: rgba(230, 243, 255, 0.95);
  font-size: 16px;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Page content wrapper */
.page-content-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary-color);
  margin-bottom: 1rem;
  line-height: 1.2;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: 1rem;
}

/* Links */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

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

/* Buttons */
.btn {
  border-radius: var(--radius-sm);
  padding: 0.5rem 1.5rem;
  font-weight: 600;
  transition: var(--transition);
}

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

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

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

.btn-secondary:hover {
  background-color: #7696c8;
  border-color: #7696c8;
}

.btn-tertiary {
  background-color: var(--tertiary-color);
  border-color: var(--tertiary-color);
  color: white;
}

.btn-tertiary:hover {
  background-color: #8ca3cc;
  border-color: #8ca3cc;
}

/* WhatsApp Button */
.btn-whatsapp {
  background-image: var(--gradient-whatsapp);
  border: none;
  color: white;
}

.btn-whatsapp:hover {
  background-image: linear-gradient(135deg, #1da851 0%, #0e6d62 100%);
  box-shadow: 0 4px 8px rgba(37, 211, 102, 0.3);
}

/* Accent Button (for upcoming events, etc.) */
.btn-accent {
  background-image: var(--gradient-accent);
  border: none;
  color: white;
}

.btn-accent:hover {
  background-image: linear-gradient(135deg, #e08e0b 0%, #c56a06 100%);
  box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
}

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

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

/* Cards */
.card {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

.card-header {
  background-color: var(--light-accent);
  border-bottom: 1px solid var(--border-light);
  padding: 1rem 1.5rem;
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  background-color: rgba(173, 187, 218, 0.1);
  border-top: 1px solid var(--border-light);
  padding: 1rem 1.5rem;
}

/* Standard Card */
.card-standard {
  background-color: white;
}

/* Primary Card */
.card-primary {
  border-top: 4px solid var(--primary-color);
}

/* Secondary Card */
.card-secondary {
  border-top: 4px solid var(--secondary-color);
}

/* Feature Card */
.card-feature {
  background-color: white;
  border: none;
  box-shadow: var(--shadow-md);
}

.card-feature .card-header {
  background-color: var(--primary-color);
  color: white;
}

/* Form Elements */
.form-control {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  padding: 0.75rem 1rem;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 0.2rem rgba(112, 145, 230, 0.25);
}

.form-label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

/* Utility Classes */
.bg-primary {
  background-color: var(--primary-color) !important;
}

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

.bg-tertiary {
  background-color: var(--tertiary-color) !important;
}

.bg-light {
  background-color: var(--bg-light) !important;
}

.text-primary {
  color: var(--primary-color) !important;
}

.text-secondary {
  color: var(--secondary-color) !important;
}

.text-muted {
  color: var(--text-muted) !important;
}

.border-primary {
  border-color: var(--primary-color) !important;
}

/* Font Family Utility Classes */
.font-abril {
  font-family: var(--font-heading) !important;
}

.font-lato {
  font-family: var(--font-body) !important;
}

.shadow-sm {
  box-shadow: var(--shadow-sm) !important;
}

.shadow-md {
  box-shadow: var(--shadow-md) !important;
}

.shadow-lg {
  box-shadow: var(--shadow-lg) !important;
}

/* Animation Classes */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.focus-visible:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Container Zoom Behavior - Allow containers to scale with zoom */
.container {
  max-width: 100% !important;
  width: 100% !important;
}

/* Responsive Utilities */
@media (max-width: 576px) {
  /* xs - Mobile phones (portrait) */
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .display-4 {
    font-size: 2rem;
  }

  .lead {
    font-size: 1rem;
  }

  .container {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    --bs-gutter-x: 1rem;
  }

  /* Adjust row margins for more compact layout */
  .row {
    margin-left: -0.25rem;
    margin-right: -0.25rem;
  }

  /* Adjust column padding for more compact layout */
  .col, .col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-11, .col-12,
  .col-sm, .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12 {
    padding-left: 0.25rem;
    padding-right: 0.25rem;
  }
}

@media (min-width: 576px) and (max-width: 767px) {
  /* sm - Mobile phones (landscape) */
  .display-4 {
    font-size: 2.25rem;
  }

  .lead {
    font-size: 1.1rem;
  }
}

@media (min-width: 768px) and (max-width: 991px) {
  /* md - Tablets */
  .display-4 {
    font-size: 2.5rem;
  }
}

@media (min-width: 992px) {
  /* lg and xl - Desktops and large desktops */
  .display-4 {
    font-size: 3rem;
  }
}