/* COSYtools Shared Reference & Engine Styles */
@import url('../css/cosy-tokens.css');
@import url('../css/tokens.css');
@import url('../css/base.css');
@import url('../css/components.css');
@import url('../css/layout.css');
@import url('../css/cosy-icons.css');

:root {
  --ref-primary: var(--sage);
  --ref-primary-dark: var(--sage-dark);
  --ref-accent: var(--accent);
  --ref-bg: var(--paper-bg);
  --ref-surface: var(--surface-color);
  --ref-border: var(--border);
  --ref-text: var(--ink);
  --ref-text-muted: var(--ink-soft);
  --ref-font-serif: var(--font-serif, "Fraunces", Georgia, serif);
  --ref-font-sans: var(--font-sans, "DM Sans", -apple-system, sans-serif);
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--ref-font-sans);
  background-color: var(--ref-bg);
  color: var(--ref-text);
  line-height: 1.6;
}

/* Header & Nav */
.ref-header {
  background: var(--ref-surface);
  border-bottom: 1px solid var(--ref-border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.ref-nav-links {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.ref-nav-links a {
  color: var(--ref-text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.ref-nav-links a:hover,
.ref-nav-links a.active {
  color: var(--ref-primary-dark);
}

/* Hero Section */
.ref-hero {
  text-align: center;
  padding: 3rem 1.5rem 2rem 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.ref-hero h1 {
  font-family: var(--ref-font-serif);
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.ref-hero p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 680px;
  margin: 0 auto 1.5rem auto;
}

/* Search Bar */
.ref-search-container {
  width: min(640px, 100%);
  min-width: min(480px, 100%);
  margin: 0 auto 2.5rem auto;
  position: relative;
}

.ref-search-input {
  width: 100%;
  padding: 1rem 1.25rem 1rem 3rem;
  font-size: 1.1rem;
  border-radius: 14px;
  border: 2px solid var(--ref-border);
  background: var(--warm-white, #ffffff);
  color: var(--ref-text);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
}

.ref-search-input:focus {
  outline: none;
  border-color: var(--ref-primary-dark);
  box-shadow: 0 0 0 4px var(--sage-mist, rgba(65,107,73,0.15));
}

.ref-search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--ref-text-muted);
  pointer-events: none;
}

/* Category Grid & Cards */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem 1.5rem;
}

.ref-card {
  background: var(--ref-surface);
  border: 1px solid var(--ref-border);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.ref-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--ref-primary);
}

.ref-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.ref-card-icon {
  font-size: 2rem;
}

.ref-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--ref-text);
}

.ref-card-desc {
  font-size: 0.95rem;
  color: var(--ref-text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

/* Tables */
.ref-table-container {
  overflow-x: auto;
  margin: 1.5rem 0;
  background: var(--ref-surface);
  border-radius: 12px;
  border: 1px solid var(--ref-border);
  box-shadow: var(--shadow-sm);
}

.ref-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.ref-table th,
.ref-table td {
  padding: 0.85rem 1.2rem;
  border-bottom: 1px solid var(--ref-border);
}

.ref-table th {
  background: var(--sage-mist, #eef4f0);
  color: var(--ref-primary-dark);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.ref-table tr:last-child td {
  border-bottom: none;
}

.ref-table tr.clickable {
  cursor: pointer;
  transition: background 0.15s ease;
}

.ref-table tr.clickable:hover {
  background: var(--sage-pale, #f4f8f5);
}

/* Practice & Quiz Box */
.ref-practice-box {
  background: var(--ref-surface);
  border: 1px solid var(--ref-border);
  border-radius: 16px;
  padding: 1.75rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-sm);
}

.ref-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  background: var(--ref-primary);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

.ref-btn:hover {
  background: var(--ref-primary-dark);
  transform: translateY(-1px);
}

.ref-btn-secondary {
  background: transparent;
  color: var(--ref-primary-dark);
  border: 2px solid var(--ref-primary);
}

.ref-btn-secondary:hover {
  background: var(--sage-mist);
}

/* Footer Banner */
.ref-promo-banner {
  background: linear-gradient(135deg, var(--sage-dark) 0%, var(--sage) 100%);
  color: #ffffff;
  padding: 2.5rem 1.5rem;
  text-align: center;
  border-radius: 16px;
  margin: 3rem 1.5rem;
}

.ref-promo-banner h2 {
  font-family: var(--ref-font-serif);
  font-size: 1.8rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.ref-promo-banner p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 1.5rem auto;
  opacity: 0.95;
}

.ref-promo-banner a {
  display: inline-block;
  background: #ffffff;
  color: var(--sage-dark);
  font-weight: 800;
  padding: 0.85rem 1.75rem;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.2s ease;
}

.ref-promo-banner a:hover {
  background: var(--warm-white, #fdf8f0);
}

/* ── Projector Mode Overrides for Reference Engine ── */
body.mode-projector .ref-hero h1,
body.theme-projector .ref-hero h1 {
  font-size: 3rem !important;
  font-weight: 800 !important;
  color: #000000 !important;
}

body.mode-projector .ref-search-input,
body.theme-projector .ref-search-input {
  font-size: 1.3rem !important;
  border: 2px solid #000000 !important;
  padding: 1.2rem 1.5rem 1.2rem 3.2rem !important;
}

body.mode-projector .ref-card,
body.theme-projector .ref-card,
body.mode-projector .ref-table-container,
body.theme-projector .ref-table-container,
body.mode-projector .ref-practice-box,
body.theme-projector .ref-practice-box {
  border: 2px solid #000000 !important;
  background: #ffffff !important;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12) !important;
}

body.mode-projector .ref-table th,
body.theme-projector .ref-table th {
  background: #e6f4ea !important;
  color: #000000 !important;
  border-bottom: 2px solid #000000 !important;
  font-size: 1.1rem !important;
}

body.mode-projector .ref-table td,
body.theme-projector .ref-table td {
  font-size: 1.1rem !important;
  border-bottom: 1px solid #000000 !important;
  color: #000000 !important;
}

@media (max-width: 768px) {
  .ref-hero h1 { font-size: 1.8rem; }
  .ref-nav-links { gap: 0.75rem; font-size: 0.85rem; }
  .ref-grid { grid-template-columns: 1fr; }
  .ref-search-container {
    width: 100%;
    min-width: 100%;
  }
}

/* Practice Section Micro-Interactions & Input Glow */
.ref-practice-box {
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.ref-practice-box:hover {
  box-shadow: 0 8px 24px rgba(46,74,51,0.08);
}

.ref-search-input:focus, #drill-user-input:focus {
  outline: none;
  border-color: var(--ref-primary-dark);
  box-shadow: 0 0 0 4px var(--sage-mist, rgba(65,107,73,0.2));
}

.qd-progress-bar-wrap {
  width: 100%;
  height: 8px;
  background: var(--ref-border);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.qd-progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--sage), var(--sage-dark));
  width: 0%;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 100px;
}