/* ===== CSS Custom Properties ===== */
:root {
  /* Colors - Light Mode */
  --bg-primary: #faf8f5;
  --bg-secondary: #f3efe9;
  --bg-card: #ffffff;
  --bg-hero: linear-gradient(135deg, #2c1810 0%, #4a2c2a 40%, #1a1a2e 100%);
  --text-primary: #2c2c2c;
  --text-secondary: #6b6b6b;
  --text-muted: #9a9a9a;
  --text-hero: #f5f0eb;
  --accent: #8b5e3c;
  --accent-light: #c49a6c;
  --accent-hover: #6d4a2e;
  --border: #e8e2da;
  --border-light: #f0ebe4;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --overlay: rgba(0,0,0,0.5);
  --modal-bg: #ffffff;
  --tag-bg: #f0ebe4;
  --tag-text: #8b5e3c;
  --search-bg: #ffffff;
  --empty-icon: #d4c5b5;

  /* Spacing */
  --container-max: 1200px;
  --section-padding: 5rem;
  --card-radius: 16px;
  --radius-sm: 8px;
  --radius-full: 9999px;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-poem: 'Merriweather', Georgia, serif;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-primary: #0f0f14;
  --bg-secondary: #1a1a22;
  --bg-card: #1e1e28;
  --bg-hero: linear-gradient(135deg, #0a0a12 0%, #1a1020 40%, #0f0f1a 100%);
  --text-primary: #e8e4df;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --text-hero: #e8e4df;
  --accent: #c49a6c;
  --accent-light: #d4b088;
  --accent-hover: #e0b888;
  --border: #2a2a35;
  --border-light: #222230;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.5);
  --overlay: rgba(0,0,0,0.7);
  --modal-bg: #1a1a22;
  --tag-bg: #2a2530;
  --tag-text: #c49a6c;
  --search-bg: #1a1a22;
  --empty-icon: #3a3540;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
}

/* ===== Utilities ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

.header.scrolled {
  background: rgba(250, 248, 245, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .header.scrolled {
  background: rgba(15, 15, 20, 0.9);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-hero);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-base);
}

.header.scrolled .logo {
  color: var(--text-primary);
}

.theme-toggle {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  color: var(--text-hero);
  font-size: 1.1rem;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.header.scrolled .theme-toggle {
  background: var(--bg-secondary);
  border-color: var(--border);
  color: var(--text-primary);
}

.theme-toggle:hover {
  background: rgba(255,255,255,0.25);
  transform: scale(1.05);
}

.header.scrolled .theme-toggle:hover {
  background: var(--border);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Hero ===== */
.hero {
  background: var(--bg-hero);
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 6rem 1.5rem 4rem;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(196, 154, 108, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(139, 94, 60, 0.1) 0%, transparent 50%);
  pointer-events: none;
}


.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  animation: heroFadeIn 1s ease-out;
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-ornament {
  font-size: 2.5rem;
  color: var(--accent-light);
  opacity: 0.6;
  margin-bottom: 1.5rem;
  letter-spacing: 0.5em;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  color: var(--text-hero);
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.hero-subtitle {
  font-family: var(--font-poem);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: rgba(245, 240, 235, 0.7);
  font-style: italic;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  font-weight: 300;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: #fff;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
}

.hero-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 94, 60, 0.3);
}

.hero-cta:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 3px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: #ffffff;
}

.hero-stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #ffffff;
  margin-top: 0.2rem;
}

/* ===== Search & Filter Section ===== */
.controls-section {
  padding: 3rem 0 1rem;
  position: sticky;
  top: 60px;
  z-index: 50;
  background: var(--bg-primary);
  transition: background-color var(--transition-slow);
}

.search-wrapper {
  position: relative;
  max-width: 560px;
  margin: 0 auto 1.5rem;
}

.search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 1rem 3rem 1rem 3.25rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--search-bg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: all var(--transition-base);
  outline: none;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 94, 60, 0.1);
}

.search-clear {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0.25rem;
  border-radius: 50%;
  display: none;
  transition: color var(--transition-fast);
  line-height: 1;
}

.search-clear.visible {
  display: block;
}

.search-clear:hover {
  color: var(--text-primary);
}

/* Categories */
.categories {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding-bottom: 0.5rem;
}

.category-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1.15rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.category-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--tag-bg);
}

.category-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.category-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.category-icon {
  font-size: 0.9rem;
}

/* ===== Poems Grid ===== */
.poems-section {
  padding: 2rem 0 var(--section-padding);
  min-height: 50vh;
}

.results-info {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.poems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* ===== Poem Card ===== */
.poem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--card-radius);
  padding: 2rem;
  cursor: pointer;
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: cardFadeIn 0.5s ease-out both;
}

@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.poem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.poem-card:hover::before {
  opacity: 1;
}

.poem-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.poem-card-category {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  width: fit-content;
  margin-bottom: 1rem;
}

.poem-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.poem-card-preview {
  font-family: var(--font-poem);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.25rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-style: italic;
}

.poem-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

.poem-card-author {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
}

.poem-card-read {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap var(--transition-base);
}

.poem-card:hover .poem-card-read {
  gap: 0.5rem;
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  animation: cardFadeIn 0.4s ease-out;
}

.empty-state-icon {
  font-size: 4rem;
  color: var(--empty-icon);
  margin-bottom: 1.5rem;
}

.empty-state-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-state-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 400px;
  margin: 0 auto;
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  backdrop-filter: blur(4px);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--modal-bg);
  border-radius: 20px;
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 3rem;
  position: relative;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-slow);
  box-shadow: var(--shadow-xl);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal::-webkit-scrollbar {
  width: 6px;
}

.modal::-webkit-scrollbar-track {
  background: transparent;
}

.modal::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--bg-secondary);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--border);
  color: var(--text-primary);
}

.modal-close:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.modal-category {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.modal-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.modal-author {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 2rem;
}

.modal-divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border: none;
  margin-bottom: 2rem;
}

.modal-content {
  font-family: var(--font-poem);
  font-size: 1.05rem;
  line-height: 2;
  color: var(--text-primary);
  white-space: pre-line;
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-ornament {
  color: var(--accent-light);
  opacity: 0.5;
  font-size: 1.2rem;
  letter-spacing: 0.4em;
  margin-bottom: 0.75rem;
}

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

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

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero {
    min-height: 75vh;
    padding: 5rem 1.25rem 3rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat-number {
    font-size: 1.5rem;
    color: #ffffff;
  }

  .poems-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .poem-card {
    padding: 1.5rem;
  }

  .modal {
    padding: 2rem 1.5rem;
    border-radius: 16px;
    max-height: 90vh;
  }

  .controls-section {
    padding: 2rem 0 0.5rem;
    top: 55px;
  }

  .categories {
    gap: 0.4rem;
  }

  .category-btn {
    padding: 0.4rem 0.9rem;
    font-size: 0.8rem;
  }

  .section-padding {
    --section-padding: 3rem;
  }
}

@media (max-width: 480px) {
  .hero-ornament {
    font-size: 1.8rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .search-input {
    font-size: 0.9rem;
    padding: 0.85rem 2.5rem 0.85rem 2.75rem;
  }

  .modal {
    padding: 1.5rem 1.25rem;
  }
}

@media (min-width: 1400px) {
  .poems-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===== Animations ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ===== Focus Styles ===== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Selection ===== */
::selection {
  background: rgba(139, 94, 60, 0.2);
  color: var(--text-primary);
}