/* ============================================
   Choose Your Own Adventure - Book-Themed CSS
   ============================================ */

/* --- CSS Variables --- */
:root {
  --parchment: #f4e8c1;
  --parchment-light: #faf3e0;
  --brown-dark: #3e2723;
  --brown-medium: #5d4037;
  --brown-light: #8d6e63;
  --accent-gold: #c8a951;
  --accent-gold-hover: #b8993e;
  --accent-gold-light: #e8d5a0;
  --deep-red: #8b1a1a;
  --deep-red-hover: #a52222;
  --white: #ffffff;
  --shadow-soft: 0 2px 8px rgba(62, 39, 35, 0.12);
  --shadow-card: 0 4px 16px rgba(62, 39, 35, 0.15);
  --shadow-elevated: 0 8px 32px rgba(62, 39, 35, 0.18);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: 0.25s ease;
  --max-width: 1100px;
  --nav-height: 60px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background-color: var(--parchment);
  color: var(--brown-dark);
  line-height: 1.6;
  min-height: 100vh;
  padding-top: var(--nav-height);
}

a {
  color: var(--accent-gold);
  text-decoration: none;
  transition: color var(--transition);
}

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

img {
  max-width: 100%;
  display: block;
}

/* --- Container --- */
.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* --- Navigation Bar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: var(--brown-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.navbar .brand {
  color: var(--accent-gold);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.navbar .nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.navbar .nav-links a {
  color: var(--parchment-light);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0;
  position: relative;
  transition: color var(--transition);
}

.navbar .nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-gold);
  transition: width var(--transition);
}

.navbar .nav-links a:hover {
  color: var(--accent-gold);
}

.navbar .nav-links a:hover::after {
  width: 100%;
}

.navbar .nav-links a.active {
  color: var(--accent-gold);
}

.navbar .nav-links a.active::after {
  width: 100%;
}

.navbar .menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.navbar .menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--parchment-light);
  margin: 5px 0;
  transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
  text-align: center;
  padding: 4rem 1rem 3rem;
  background: linear-gradient(
    180deg,
    var(--parchment-light) 0%,
    var(--parchment) 100%
  );
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--brown-dark);
  margin-bottom: 0.5rem;
  letter-spacing: -0.5px;
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--brown-medium);
  font-style: italic;
  margin-bottom: 1.5rem;
}

.hero .description {
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--brown-medium);
  line-height: 1.7;
}

/* --- Cards / Panels --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: 2rem 0;
}

.card {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid rgba(62, 39, 35, 0.06);
}

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

.card h3 {
  font-size: 1.3rem;
  color: var(--brown-dark);
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--brown-medium);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.card .card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.card a.card-link {
  display: inline-block;
  color: var(--accent-gold);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color var(--transition);
}

.card a.card-link:hover {
  color: var(--accent-gold-hover);
}

.panel {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 2rem;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(62, 39, 35, 0.06);
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition),
    box-shadow var(--transition);
  text-align: center;
  line-height: 1.4;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary button -- gold accent */
.btn-primary {
  background-color: var(--accent-gold);
  color: var(--brown-dark);
}

.btn-primary:hover {
  background-color: var(--accent-gold-hover);
  box-shadow: 0 4px 12px rgba(200, 169, 81, 0.35);
  color: var(--brown-dark);
}

/* Choice button -- styled like a book page option */
.btn-choice {
  display: block;
  width: 100%;
  background: var(--parchment-light);
  color: var(--brown-dark);
  border: 2px solid var(--accent-gold-light);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--transition), background-color var(--transition),
    box-shadow var(--transition);
  margin-bottom: 0.75rem;
}

.btn-choice:hover {
  border-color: var(--accent-gold);
  background-color: var(--white);
  box-shadow: 0 2px 10px rgba(200, 169, 81, 0.2);
}

.btn-choice:active {
  transform: scale(0.99);
}

/* Secondary / outline button */
.btn-secondary {
  background: transparent;
  color: var(--brown-dark);
  border: 2px solid var(--brown-light);
}

.btn-secondary:hover {
  border-color: var(--brown-dark);
  background-color: rgba(62, 39, 35, 0.05);
}

/* Danger / red button */
.btn-danger {
  background-color: var(--deep-red);
  color: var(--white);
}

.btn-danger:hover {
  background-color: var(--deep-red-hover);
}

/* --- Story Text Area (Book Page) --- */
.story-page {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevated);
  padding: 3rem 2.5rem;
  max-width: 720px;
  margin: 2rem auto;
  position: relative;
  border: 1px solid rgba(62, 39, 35, 0.08);
}

/* Subtle "page edge" accent on the left */
.story-page::before {
  content: "";
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  left: 0;
  width: 4px;
  background: linear-gradient(
    180deg,
    var(--accent-gold-light),
    var(--accent-gold),
    var(--accent-gold-light)
  );
  border-radius: 2px;
}

.story-page .page-number {
  display: inline-block;
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 0.85rem;
  color: var(--brown-light);
  margin-bottom: 1rem;
  font-style: italic;
}

.story-page .story-text {
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--brown-dark);
  white-space: pre-wrap;
  margin-bottom: 2rem;
}

.story-page .choices {
  border-top: 1px solid var(--accent-gold-light);
  padding-top: 1.5rem;
}

/* --- Terminal / Ending Badge --- */
.badge-ending {
  display: inline-block;
  background-color: var(--deep-red);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
}

.badge-gold {
  background-color: var(--accent-gold-light);
  color: var(--brown-dark);
}

.badge-brown {
  background-color: var(--brown-light);
  color: var(--white);
}

/* --- Stats Section --- */
.stats-row {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 2.5rem 0;
}

.stat-box {
  text-align: center;
  padding: 1.5rem 2rem;
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  min-width: 150px;
  border: 1px solid rgba(62, 39, 35, 0.06);
}

.stat-box .stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-gold);
  line-height: 1.2;
}

.stat-box .stat-label {
  font-size: 0.85rem;
  color: var(--brown-light);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 0.25rem;
}

/* --- Graph Container (Explorer) --- */
.graph-container {
  width: 100%;
  min-height: 500px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(62, 39, 35, 0.08);
  position: relative;
  overflow: hidden;
}

.graph-container canvas,
.graph-container svg {
  width: 100%;
  height: 100%;
}

.graph-controls {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

/* --- Form Styling (Author Tool) --- */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--brown-dark);
  margin-bottom: 0.4rem;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.65rem 0.9rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--brown-dark);
  background: var(--white);
  border: 2px solid #d4c5a0;
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px rgba(200, 169, 81, 0.2);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
  font-family: "Georgia", "Times New Roman", serif;
  line-height: 1.7;
}

.form-group .help-text {
  font-size: 0.8rem;
  color: var(--brown-light);
  margin-top: 0.3rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* --- Section Titles --- */
.section {
  padding: 3rem 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--brown-dark);
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--brown-medium);
  font-size: 1rem;
  margin-bottom: 2rem;
}

/* --- Footer --- */
.footer {
  background-color: var(--brown-dark);
  color: var(--brown-light);
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 3rem;
  font-size: 0.9rem;
}

.footer strong {
  color: var(--parchment-light);
}

.footer p + p {
  margin-top: 0.4rem;
}

/* --- Utility --- */
.text-center {
  text-align: center;
}

.mt-1 {
  margin-top: 0.5rem;
}
.mt-2 {
  margin-top: 1rem;
}
.mt-3 {
  margin-top: 1.5rem;
}
.mb-1 {
  margin-bottom: 0.5rem;
}
.mb-2 {
  margin-bottom: 1rem;
}
.mb-3 {
  margin-bottom: 1.5rem;
}

.hidden {
  display: none !important;
}

/* --- Loading Spinner --- */
.loading {
  text-align: center;
  padding: 2rem;
  color: var(--brown-light);
}

.loading::after {
  content: "";
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--accent-gold-light);
  border-top-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 0.5rem;
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }

  .navbar {
    padding: 0 1rem;
  }

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

  .navbar .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--brown-dark);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  }

  .navbar .nav-links.open {
    display: flex;
  }

  .navbar .nav-links a {
    padding: 0.8rem 1.5rem;
    display: block;
  }

  .navbar .nav-links a::after {
    display: none;
  }

  .hero {
    padding: 2.5rem 1rem 2rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.05rem;
  }

  .story-page {
    padding: 2rem 1.5rem;
    margin: 1rem;
  }

  .story-page::before {
    width: 3px;
  }

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

  .stats-row {
    gap: 1rem;
  }

  .stat-box {
    min-width: 120px;
    padding: 1rem 1.25rem;
  }

  .stat-box .stat-number {
    font-size: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 2rem 0;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .graph-container {
    min-height: 350px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.65rem;
  }

  .story-page {
    padding: 1.5rem 1.25rem;
  }

  .story-page .story-text {
    font-size: 1rem;
  }

  .btn-choice {
    padding: 0.8rem 1rem;
    font-size: 0.95rem;
  }

  .stats-row {
    flex-direction: column;
    align-items: center;
  }

  .stat-box {
    width: 100%;
    max-width: 240px;
  }
}