/**
 * Alpha AI Learning Site - Custom CSS
 * Built on GitHub Primer CSS with fraternity color overrides
 *
 * Color Palette:
 * - Primary: Black (#000000)
 * - Accent: Old Gold (#CFB53B)
 * - Success: WhatsApp Green (#25D366)
 * - Text: Near-black (#24292f)
 * - Muted: Darker gray (#57606a)
 */

/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */

:root {
  /* Fraternity Colors */
  --alpha-gold: #CFB53B;
  --alpha-gold-light: #e0c85c;
  --alpha-gold-dark: #b89b2f;
  --alpha-black: #000000;
  --alpha-black-soft: #1a1a1a;

  /* Functional Colors */
  --whatsapp-green: #25D366;
  --success-green: #2da44e;
  --warning-yellow: #fff3cd;

  /* Text Colors - High Contrast for Older Eyes */
  --text-primary: #24292f;
  --text-secondary: #57606a;
  --text-on-dark: #ffffff;
  --text-on-gold: #000000;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-dark: #000000;
  --bg-dark-soft: #1a1a1a;

  /* Typography - Larger for Older Eyes */
  --font-size-base: 18px;
  --font-size-lg: 1.125rem;  /* 20px */
  --font-size-xl: 1.25rem;   /* 22px */
  --line-height-base: 1.6;
  --line-height-relaxed: 1.8;

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

  /* Touch Targets - Minimum 48px for Accessibility */
  --touch-target-min: 48px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-gold: 0 4px 12px rgba(207, 181, 59, 0.3);

  /* Borders */
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
}

/* ==========================================================================
   Base Styles - Override Primer Defaults for Accessibility
   ========================================================================== */

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

/* Larger, more readable headings */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
}

p, li {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
}

/* Higher contrast for muted text */
.color-fg-muted {
  color: var(--text-secondary) !important;
}

/* Links with gold color */
a {
  color: var(--alpha-gold-dark);
  text-decoration: underline;
}

a:hover {
  color: var(--alpha-gold);
}

/* ==========================================================================
   Custom Button Styles
   ========================================================================== */

/* Base button enhancements for larger touch targets */
.btn {
  min-height: var(--touch-target-min);
  font-size: var(--font-size-lg);
  padding: 12px 24px;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-large,
.btn-lg {
  min-height: 56px;
  font-size: 1.25rem;
  padding: 16px 32px;
}

/* Primary Gold Button */
.btn-alpha-gold {
  background: linear-gradient(135deg, var(--alpha-gold) 0%, var(--alpha-gold-dark) 100%);
  color: var(--text-on-gold);
  border: none;
  box-shadow: var(--shadow-gold);
}

.btn-alpha-gold:hover {
  background: linear-gradient(135deg, var(--alpha-gold-light) 0%, var(--alpha-gold) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(207, 181, 59, 0.4);
  color: var(--text-on-gold);
}

.btn-alpha-gold:active {
  transform: translateY(0);
}

/* White Button (for use on gold backgrounds) */
.btn-white {
  background: var(--bg-primary);
  color: var(--alpha-black);
  border: none;
}

.btn-white:hover {
  background: #f0f0f0;
  color: var(--alpha-black);
}

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

.btn-whatsapp:hover {
  background: #20bd5a;
  color: white;
}

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

.hero-section {
  background: linear-gradient(135deg, var(--alpha-black) 0%, var(--bg-dark-soft) 100%);
  color: var(--text-on-dark);
  padding: var(--space-xl) 0;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero-section {
    padding: var(--space-2xl) 0;
  }
}

.hero-section h1 {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

@media (min-width: 768px) {
  .hero-section h1 {
    font-size: 3rem;
  }
}

.hero-section .lead {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
  .hero-section .lead {
    font-size: 1.5rem;
  }
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.hero-stat {
  background: rgba(207, 181, 59, 0.15);
  border: 1px solid rgba(207, 181, 59, 0.3);
  padding: 8px 16px;
  border-radius: var(--border-radius-xl);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.9);
}

/* ==========================================================================
   Reassurance Section
   ========================================================================== */

.reassurance-section {
  background: var(--bg-secondary);
  padding: var(--space-xl) 0;
}

.reassurance-section h2 {
  color: var(--text-primary);
}

.comparison-box {
  background: var(--bg-primary);
  border: 1px solid #d0d7de;
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  text-align: left;
}

.comparison-box.highlighted {
  border: 2px solid var(--alpha-gold);
  box-shadow: var(--shadow-gold);
}

.comparison-box h3 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.comparison-box p {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin: 0;
}

/* ==========================================================================
   Video Preview Section
   ========================================================================== */

.video-preview-section {
  padding: var(--space-xl) 0;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
  overflow: hidden;
  border-radius: var(--border-radius-md);
  background: #000;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--alpha-black) 0%, var(--bg-dark-soft) 100%);
  color: var(--text-on-dark);
  text-align: center;
  padding: var(--space-md);
}

.video-placeholder-icon {
  font-size: 4rem;
  margin-bottom: var(--space-sm);
  color: var(--alpha-gold);
}

/* ==========================================================================
   Learning Journey Section
   ========================================================================== */

.learning-journey {
  background: var(--bg-secondary);
  padding: var(--space-xl) 0;
}

.week-card {
  background: var(--bg-primary);
  border: 1px solid #d0d7de;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.week-card-header {
  background: var(--alpha-gold);
  color: var(--text-on-gold);
  padding: var(--space-sm) var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.week-card-header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.week-card-header span {
  font-size: 0.9rem;
  opacity: 0.9;
}

.week-card-body {
  padding: var(--space-md);
}

.week-card-body p {
  margin-bottom: var(--space-sm);
}

.week-card-body ul {
  margin: 0;
  padding-left: 1.5rem;
}

.week-card-body li {
  margin-bottom: var(--space-xs);
  font-size: 1rem;
}

/* Pace Note Box */
.pace-note {
  background: var(--warning-yellow);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  margin-top: var(--space-md);
}

.pace-note h4 {
  margin-bottom: var(--space-xs);
}

.pace-note p {
  margin: 0;
}

.pace-note p + p {
  margin-top: var(--space-xs);
}

/* ==========================================================================
   Outcomes Section
   ========================================================================== */

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

.outcome-item {
  display: flex;
  align-items: flex-start;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid #d0d7de;
}

.outcome-item:last-child {
  border-bottom: none;
}

.outcome-check {
  color: var(--alpha-gold);
  font-size: 1.5rem;
  margin-right: var(--space-sm);
  flex-shrink: 0;
}

.outcome-text {
  font-size: var(--font-size-lg);
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about-section {
  padding: var(--space-xl) 0;
  background: var(--bg-secondary);
}

.about-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--alpha-gold);
  box-shadow: var(--shadow-lg);
}

.about-photo-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--alpha-gold) 0%, var(--alpha-gold-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-on-gold);
  font-size: 4rem;
  font-weight: 700;
  border: 4px solid var(--alpha-gold);
  box-shadow: var(--shadow-lg);
}

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

.final-cta {
  background: linear-gradient(135deg, var(--alpha-gold) 0%, var(--alpha-gold-dark) 100%);
  color: var(--text-on-gold);
  padding: var(--space-xl) 0;
  text-align: center;
}

.final-cta h2 {
  color: var(--text-on-gold);
  margin-bottom: var(--space-sm);
}

.final-cta p {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  opacity: 0.9;
}

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

.site-footer {
  background: var(--bg-secondary);
  padding: var(--space-xl) 0 var(--space-lg);
  border-top: 1px solid #d0d7de;
}

.footer-logo {
  height: 60px;
  width: auto;
}

.footer-motto {
  font-style: italic;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--text-primary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--alpha-gold);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #d0d7de;
  padding-top: var(--space-md);
  margin-top: var(--space-md);
  text-align: center;
}

/* ==========================================================================
   Fixed Help Button
   ========================================================================== */

.help-button-fixed {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
}

.help-button-fixed .btn {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  font-size: 1rem;
}

@media (max-width: 767px) {
  .help-button-fixed {
    bottom: 16px;
    right: 16px;
  }

  .help-button-fixed .btn {
    padding: 12px 16px;
    font-size: 0.9rem;
  }
}

/* ==========================================================================
   Learning Plan Page Styles
   ========================================================================== */

.progress-header {
  background: var(--bg-primary);
  border: 1px solid #d0d7de;
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
}

.progress-bar-container {
  background: #e1e4e8;
  border-radius: 8px;
  height: 12px;
  overflow: hidden;
}

.progress-bar-fill {
  background: linear-gradient(90deg, var(--success-green), #3fb950);
  height: 100%;
  border-radius: 8px;
  transition: width 0.3s ease;
}

.module-item {
  padding: var(--space-sm);
  border-bottom: 1px solid #d0d7de;
}

.module-item:last-child {
  border-bottom: none;
}

.module-checkbox {
  width: 24px;
  height: 24px;
  cursor: pointer;
  accent-color: var(--alpha-gold);
}

.module-title {
  font-weight: 600;
  color: var(--text-primary);
}

.module-duration {
  background: var(--alpha-gold);
  color: var(--text-on-gold);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-left: var(--space-xs);
}

.module-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

.module-completed .module-title {
  text-decoration: line-through;
  color: var(--text-secondary);
}

/* Week Navigation */
.week-nav {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid #d0d7de;
}

/* ==========================================================================
   Quick Reference Page Styles
   ========================================================================== */

.search-box {
  width: 100%;
  padding: 14px 16px;
  font-size: var(--font-size-lg);
  border: 1px solid #d0d7de;
  border-radius: var(--border-radius-sm);
  background: var(--bg-primary);
}

.search-box:focus {
  outline: none;
  border-color: var(--alpha-gold);
  box-shadow: 0 0 0 3px rgba(207, 181, 59, 0.2);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.reference-table {
  width: 100%;
  border-collapse: collapse;
}

.reference-table th {
  background: var(--bg-secondary);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid #d0d7de;
}

.reference-table td {
  padding: 12px 16px;
  border-bottom: 1px solid #d0d7de;
}

.reference-table code {
  background: rgba(207, 181, 59, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 0.9em;
  color: var(--alpha-gold-dark);
}

/* Tool Comparison Labels */
.tool-label {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
}

.tool-label-yes {
  background: #dafbe1;
  color: #1a7f37;
}

.tool-label-no {
  background: #ffebe9;
  color: #cf222e;
}

.tool-label-limited {
  background: #fff8c5;
  color: #9a6700;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* Text utilities */
.text-gold {
  color: var(--alpha-gold) !important;
}

.text-gold-dark {
  color: var(--alpha-gold-dark) !important;
}

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

.bg-gold-gradient {
  background: linear-gradient(135deg, var(--alpha-gold) 0%, var(--alpha-gold-dark) 100%) !important;
}

.bg-dark-gradient {
  background: linear-gradient(135deg, var(--alpha-black) 0%, var(--bg-dark-soft) 100%) !important;
}

/* Border utilities */
.border-gold {
  border-color: var(--alpha-gold) !important;
}

/* Shadow utilities */
.shadow-gold {
  box-shadow: var(--shadow-gold) !important;
}

/* ==========================================================================
   Responsive Utilities
   ========================================================================== */

@media (max-width: 767px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .container-lg {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-section {
    padding: var(--space-lg) 0;
  }

  .about-photo,
  .about-photo-placeholder {
    width: 150px;
    height: 150px;
    font-size: 3rem;
  }
}

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

@media print {
  .help-button-fixed,
  .btn,
  nav {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }

  .hero-section,
  .final-cta {
    background: #f0f0f0 !important;
    color: #000 !important;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .week-card-header {
    background: #f0f0f0 !important;
    color: #000 !important;
  }
}

/* ==========================================================================
   Brotherhood Background Images
   ========================================================================== */

/* Base style for sections with background images */
.bg-bros {
  position: relative;
  overflow: hidden;
}

.bg-bros::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.08;
  filter: grayscale(100%);
  z-index: 0;
  pointer-events: none;
}

.bg-bros > * {
  position: relative;
  z-index: 1;
}

/* Specific background images - add your images to assets/images/bros/ */
.bg-bros-1::before {
  background-image: url('../images/bros/bros-1.jpg');
}

.bg-bros-2::before {
  background-image: url('../images/bros/bros-2.jpg');
}

.bg-bros-3::before {
  background-image: url('../images/bros/bros-3.jpg');
}

.bg-bros-4::before {
  background-image: url('../images/bros/bros-4.jpg');
}

.bg-bros-5::before {
  background-image: url('../images/bros/bros-5.jpg');
}

.bg-bros-6::before {
  background-image: url('../images/bros/bros-6.jpg');
}

.bg-bros-7::before {
  background-image: url('../images/bros/bros-7.jpg');
}

.bg-bros-8::before {
  background-image: url('../images/bros/bros-8.jpg');
}

.bg-bros-9::before {
  background-image: url('../images/bros/bros-9.jpg');
}

.bg-bros-10::before {
  background-image: url('../images/bros/bros-10.jpg');
}

.bg-bros-11::before {
  background-image: url('../images/bros/bros-11.jpg');
}

/* Lighter opacity for dark sections */
.hero-section.bg-bros::before {
  opacity: 0.15;
  filter: grayscale(100%) brightness(1.2);
  background-position: center top;
}

/* Slightly more visible on light sections */
.about-section.bg-bros::before,
.reassurance-section.bg-bros::before {
  opacity: 0.06;
}

/* For the inspiration/final CTA sections */
.final-cta.bg-bros::before {
  opacity: 0.1;
  filter: grayscale(100%) brightness(1.3);
  background-position: center 14%;
}

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

/* Focus states */
:focus {
  outline: 2px solid var(--alpha-gold);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--alpha-gold);
  outline-offset: 2px;
}

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--alpha-gold);
  color: var(--text-on-gold);
  padding: 8px 16px;
  z-index: 100;
  transition: top 0.3s;
}

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

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}