/**
 * CLEAN DREAM UI - Minimal & Readable Design
 * Optimized for mobile readability
 */

/* ============================================
   CSS VARIABLES - Simple Color System
   ============================================ */
:root {
  /* Colors - Light & Clean */
  --white: #FFFFFF;
  --off-white: #FAFBFC;
  --light-gray: #F5F6F7;
  --gray: #E1E4E8;
  --dark-gray: #6A737D;
  --text-primary: #24292E;
  --text-secondary: #586069;

  /* Brand Colors - Soft & Professional */
  --primary: #5B6DCD;
  --primary-light: #8996E0;
  --primary-dark: #4A5AA8;
  --accent: #7C3AED;
  --accent-light: #A78BFA;

  /* Feedback Colors */
  --success: #28A745;
  --info: #17A2B8;
  --warning: #FFC107;

  /* Spacing - Generous for readability */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;

  /* Typography */
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 28px;
  --font-size-4xl: 32px;

  --line-height-tight: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* Border & Shadow */
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border: 1px solid var(--gray);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
}

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

body {
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--off-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   HEADER - Modern & Elegant
   ============================================ */
.clean-header {
  background: var(--white);
  border-bottom: var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.clean-header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.clean-logo {
  height: 40px;
  width: auto;
  display: block;
  transition: opacity 0.2s ease;
}

.clean-logo:hover {
  opacity: 0.85;
}

/* Accordion Menu Button */
.clean-accordion-btn {
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius);
  padding: 10px 20px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(91, 109, 205, 0.2);
}

.clean-accordion-btn:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(91, 109, 205, 0.3);
  transform: translateY(-1px);
}

.clean-accordion-btn:active {
  transform: translateY(0);
}

.clean-accordion-btn i {
  font-size: 18px;
  transition: transform 0.3s ease;
}

.clean-accordion-btn.active i {
  transform: rotate(180deg);
}

/* Accordion Panel */
.clean-accordion-panel {
  position: fixed;
  top: 81px;
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 999;
}

.clean-accordion-panel.active {
  max-height: calc(100vh - 81px);
  opacity: 1;
  overflow-y: auto;
}

.clean-accordion-content {
  padding: 16px 0;
}

.clean-accordion-link {
  display: block;
  padding: 14px 24px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.clean-accordion-link:hover {
  background: var(--light-gray);
  color: var(--primary);
  border-left-color: var(--primary);
  padding-left: 28px;
}

.clean-accordion-link:active {
  background: var(--gray);
}

/* ============================================
   SEARCH SECTION - Minimal Design
   ============================================ */
.clean-search-section {
  background: var(--white);
  padding: var(--space-xl) var(--space-md);
  border-bottom: var(--border);
}

.clean-search-container {
  max-width: 800px;
  margin: 0 auto;
}

.clean-search-box {
  position: relative;
  width: 100%;
}

.clean-search-input {
  width: 100%;
  padding: var(--space-md);
  padding-right: 120px;
  font-size: var(--font-size-lg);
  font-family: var(--font-base);
  border: 2px solid var(--gray);
  border-radius: var(--border-radius-lg);
  background: var(--white);
  color: var(--text-primary);
  resize: none;
  overflow: hidden;
  transition: border-color 0.2s;
}

.clean-search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91, 109, 205, 0.1);
}

.clean-search-input::placeholder {
  color: var(--dark-gray);
}

.clean-search-button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  padding: 12px 24px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.clean-search-button:hover {
  background: var(--primary-dark);
}

.clean-search-icon {
  width: 18px;
  height: 18px;
}

.clean-char-counter {
  position: absolute;
  bottom: -24px;
  right: 0;
  font-size: var(--font-size-sm);
  color: var(--dark-gray);
}

/* ============================================
   MAIN CONTAINER - Wide & Readable
   ============================================ */
.clean-container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

/* ============================================
   BREADCRUMBS - Simple
   ============================================ */
.clean-breadcrumb {
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.clean-breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.clean-breadcrumb li::after {
  content: '›';
  margin-left: 8px;
  color: var(--dark-gray);
}

.clean-breadcrumb li:last-child::after {
  content: '';
}

.clean-breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.clean-breadcrumb a:hover {
  text-decoration: underline;
}

/* ============================================
   HEADINGS - Clear Hierarchy
   ============================================ */
.clean-h1 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
}

.clean-h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-lg);
}

/* ============================================
   CONTENT CARD - Clean White Box
   ============================================ */
.clean-card {
  background: var(--white);
  border: var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.clean-card-header {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--light-gray);
}

/* ============================================
   DREAM ENTRY - Spacious Layout
   ============================================ */
.clean-dream-entry {
  padding: var(--space-lg) 0;
  border-bottom: var(--border);
}

.clean-dream-entry:last-child {
  border-bottom: none;
}

.clean-dream-entry h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--space-md);
}

.clean-dream-entry p {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.clean-dream-entry ul,
.clean-dream-entry ol {
  margin-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.clean-dream-entry li {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-sm);
}

.clean-source {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-style: italic;
}

.clean-source a {
  color: var(--primary);
  text-decoration: none;
}

.clean-source a:hover {
  text-decoration: underline;
}

/* ============================================
   LIST ITEMS - Clear & Clickable
   ============================================ */
.clean-list-item {
  padding: var(--space-md);
  border-bottom: var(--border);
  transition: background 0.2s;
}

.clean-list-item:hover {
  background: var(--light-gray);
}

.clean-list-item a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-lg);
  display: block;
}

.clean-list-item a:hover {
  color: var(--primary);
}

/* ============================================
   ALPHABET NAVIGATION - Grid Layout
   ============================================ */
.clean-alphabet-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.clean-alphabet-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  background: var(--white);
  border: var(--border);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-lg);
  transition: all 0.2s;
}

.clean-alphabet-letter:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ============================================
   FOOTER - Simple & Clean
   ============================================ */
.clean-footer {
  background: var(--white);
  border-top: var(--border);
  padding: var(--space-xl) var(--space-md);
  margin-top: var(--space-xl);
}

.clean-footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.clean-footer p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-sm);
}

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

.clean-footer a:hover {
  text-decoration: underline;
}

.clean-footer-logo {
  width: 20px;
  height: 20px;
  vertical-align: middle;
  margin: 0 4px;
}

/* ============================================
   RESPONSIVE - MOBILE FIRST
   ============================================ */

/* Tablet */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 28px;
    --font-size-3xl: 24px;
    --font-size-2xl: 20px;
    --font-size-xl: 18px;
    --font-size-lg: 17px;
    --font-size-base: 16px;
  }

  .clean-header-container {
    padding: 16px;
  }

  .clean-logo {
    height: 36px;
  }

  .clean-accordion-btn {
    padding: 8px 16px;
    font-size: 14px;
  }

  .clean-accordion-panel {
    top: 69px;
  }

  .clean-accordion-link {
    padding: 12px 16px;
    font-size: 15px;
  }

  .clean-search-section {
    padding: var(--space-lg) var(--space-sm);
  }

  .clean-search-input {
    padding: var(--space-md);
    padding-right: 70px;
    font-size: var(--font-size-base);
  }

  .clean-search-button span {
    display: none;
  }

  .clean-search-button {
    padding: 12px 16px;
  }

  .clean-container {
    padding: var(--space-md) var(--space-sm);
  }

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

  .clean-alphabet-nav {
    grid-template-columns: repeat(auto-fit, minmax(44px, 1fr));
    gap: var(--space-xs);
  }

  .clean-alphabet-letter {
    padding: var(--space-sm);
    font-size: var(--font-size-base);
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  :root {
    --space-xl: 32px;
    --space-lg: 24px;
  }

  .clean-h1 {
    font-size: 24px;
  }

  .clean-h2 {
    font-size: 17px;
  }

  .clean-card {
    padding: var(--space-sm);
  }

  .clean-dream-entry {
    padding: var(--space-md) 0;
  }

  .clean-dream-entry h3 {
    font-size: var(--font-size-lg);
  }

  .clean-dream-entry p {
    font-size: var(--font-size-base);
  }
}

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

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }

/* Screen Reader Only */
.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 for Accessibility */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .clean-header,
  .clean-search-section,
  .clean-footer,
  .clean-alphabet-nav {
    display: none;
  }

  .clean-card {
    box-shadow: none;
    border: none;
  }
}