/* ============================================
   WikiResearch — Styles
   Aesthetic: Editorial Dark / Refined Ink
   ============================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #0d0d0f;
  --ink-2: #1a1a1f;
  --ink-3: #242430;
  --surface: #16161e;
  --surface-2: #1e1e2a;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.15);
  --text-primary: #f0eee8;
  --text-secondary: #a09e98;
  --text-muted: #5a5860;
  --accent: #d4a84b;
  --accent-dim: rgba(212, 168, 75, 0.15);
  --accent-glow: rgba(212, 168, 75, 0.35);
  --blue: #6eb5ff;
  --blue-dim: rgba(110, 181, 255, 0.1);
  --red: #ff6b6b;
  --green: #6bcb77;
  --radius: 12px;
  --radius-sm: 8px;
  --sidebar-w: 260px;
  --font-serif: 'Playfair Display', serif;
  --font-body: 'Source Serif 4', serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

html { font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--ink);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ---- Background ---- */
.bg-grid {
  position: fixed; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.bg-orb {
  position: fixed; border-radius: 50%; pointer-events: none; z-index: 0;
  filter: blur(100px); opacity: 0.3;
  animation: orbFloat 12s ease-in-out infinite alternate;
}
.orb-1 { width: 500px; height: 500px; background: radial-gradient(circle, #d4a84b22, transparent); top: -100px; right: -100px; animation-delay: 0s; }
.orb-2 { width: 400px; height: 400px; background: radial-gradient(circle, #6eb5ff18, transparent); bottom: -80px; left: 200px; animation-delay: -6s; }

@keyframes orbFloat {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(30px, 20px) scale(1.1); }
}

/* ---- App Layout ---- */
.app-wrapper {
  display: flex; min-height: 100vh;
  position: relative; z-index: 1;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 28px 20px;
  position: fixed; top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header { margin-bottom: 36px; }

.logo { display: flex; align-items: center; gap: 12px; }

.logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent), #b8892d);
  color: var(--ink);
  font-family: var(--font-serif);
  font-weight: 700; font-size: 20px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px var(--accent-glow);
  flex-shrink: 0;
}

.logo-text { display: flex; flex-direction: column; }
.logo-title { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 700; color: var(--text-primary); }
.logo-sub { font-size: 0.68rem; color: var(--text-muted); font-family: var(--font-mono); letter-spacing: 0.05em; }

.sidebar-nav { display: flex; flex-direction: column; gap: 4px; margin-bottom: 36px; }

.nav-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-sm);
  background: transparent; border: none; color: var(--text-secondary);
  cursor: pointer; font-size: 0.88rem; font-family: var(--font-body);
  text-align: left; transition: var(--transition);
}
.nav-btn:hover { background: var(--ink-3); color: var(--text-primary); }
.nav-btn.active { background: var(--accent-dim); color: var(--accent); border: 1px solid rgba(212,168,75,0.25); }
.nav-btn svg { flex-shrink: 0; }

.sidebar-stats {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: 8px; margin-bottom: 28px;
  padding: 16px 12px;
  background: var(--ink-3); border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.stat-item { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.stat-num { font-family: var(--font-mono); font-size: 1.2rem; color: var(--accent); font-weight: 500; }
.stat-label { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }

.section-label { font-size: 0.68rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 10px; font-family: var(--font-mono); }

.chip-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  background: var(--ink-3); border: 1px solid var(--border);
  color: var(--text-secondary); border-radius: 20px;
  padding: 4px 12px; font-size: 0.75rem; font-family: var(--font-mono);
  cursor: pointer; transition: var(--transition);
}
.chip:hover { background: var(--accent-dim); color: var(--accent); border-color: rgba(212,168,75,0.3); }

.sidebar-footer { margin-top: auto; padding-top: 24px; }
.powered-by { font-size: 0.68rem; color: var(--text-muted); font-family: var(--font-mono); }

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1; padding: 40px 48px;
  max-width: calc(100vw - var(--sidebar-w));
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---- Header ---- */
.main-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 36px;
}
.header-text h1 {
  font-family: var(--font-serif);
  font-size: 2.4rem; font-weight: 400;
  line-height: 1.2; color: var(--text-primary);
  margin-bottom: 6px;
}
.header-text h1 em { font-style: italic; color: var(--accent); }
.header-text p { color: var(--text-secondary); font-size: 0.95rem; }

/* ---- Search Zone ---- */
.search-zone { margin-bottom: 40px; }

.search-bar-wrap {
  display: flex; align-items: center; gap: 0;
  background: var(--surface-2);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  padding: 6px 6px 6px 18px;
  transition: var(--transition);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.search-bar-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 4px 30px var(--accent-glow);
}

.search-icon { color: var(--text-muted); flex-shrink: 0; }

.search-input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text-primary); font-family: var(--font-body);
  font-size: 1rem; padding: 10px 16px;
}
.search-input::placeholder { color: var(--text-muted); }

.search-btn {
  display: flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--accent), #b8892d);
  color: var(--ink); border: none; border-radius: 8px;
  padding: 10px 20px; font-weight: 600; font-size: 0.88rem;
  cursor: pointer; transition: var(--transition); white-space: nowrap;
  font-family: var(--font-mono);
}
.search-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow); }
.search-btn:active { transform: translateY(0); }
.search-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.search-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 10px; font-family: var(--font-mono); padding-left: 4px; }

/* ============================================
   STATES
   ============================================ */
.hidden { display: none !important; }

/* Loading */
.loading-state {
  display: flex; flex-direction: column; align-items: center;
  padding: 80px 20px; gap: 20px;
}
.loader-rings {
  position: relative; width: 64px; height: 64px;
}
.ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid transparent;
  animation: spin 1.4s linear infinite;
}
.ring-1 { border-top-color: var(--accent); animation-duration: 1.4s; }
.ring-2 { inset: 8px; border-top-color: var(--blue); animation-duration: 1.0s; animation-direction: reverse; }
.ring-3 { inset: 16px; border-top-color: rgba(212,168,75,0.4); animation-duration: 0.7s; }

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

.loading-text { font-size: 1rem; color: var(--text-secondary); }
.loading-sub { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); }

/* Error */
.error-state {
  display: flex; flex-direction: column; align-items: center;
  padding: 80px 20px; gap: 12px; text-align: center;
}
.error-icon { font-size: 2.5rem; color: var(--red); }
.error-title { font-family: var(--font-serif); font-size: 1.4rem; color: var(--text-primary); }
.error-msg { color: var(--text-secondary); max-width: 400px; }
.retry-btn {
  margin-top: 12px; padding: 10px 28px;
  background: var(--ink-3); border: 1px solid var(--border-hover);
  color: var(--text-primary); border-radius: var(--radius-sm);
  cursor: pointer; font-family: var(--font-mono); font-size: 0.85rem;
  transition: var(--transition);
}
.retry-btn:hover { background: var(--surface-2); border-color: var(--accent); color: var(--accent); }

/* Empty State */
.empty-state {
  display: flex; flex-direction: column; align-items: center;
  padding: 60px 20px; gap: 16px; text-align: center;
}
.empty-visual {
  position: relative; width: 120px; height: 120px; margin-bottom: 12px;
}
.empty-circle {
  position: absolute; border-radius: 50%; border: 1px solid;
  animation: pulse 3s ease-in-out infinite;
}
.c1 { inset: 0; border-color: rgba(212,168,75,0.3); animation-delay: 0s; }
.c2 { inset: 16px; border-color: rgba(110,181,255,0.25); animation-delay: -1s; }
.c3 { inset: 32px; border-color: rgba(212,168,75,0.15); animation-delay: -2s; }
.empty-w {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-size: 3rem; font-weight: 700; color: var(--accent);
  text-shadow: 0 0 40px var(--accent-glow);
}
@keyframes pulse { 0%,100% { opacity: 0.4; transform: scale(1); } 50% { opacity: 1; transform: scale(1.03); } }

.empty-state h2 { font-family: var(--font-serif); font-size: 1.6rem; font-weight: 400; color: var(--text-primary); }
.empty-state p { color: var(--text-secondary); max-width: 440px; line-height: 1.7; }

.example-queries { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; width: 100%; max-width: 480px; }
.example-label { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-mono); text-align: left; }
.example-q {
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-secondary); text-align: left; padding: 12px 16px;
  border-radius: var(--radius-sm); cursor: pointer; font-family: var(--font-body);
  font-size: 0.88rem; transition: var(--transition);
}
.example-q:hover { border-color: var(--accent); color: var(--text-primary); background: var(--accent-dim); padding-left: 20px; }

/* ============================================
   RESULTS
   ============================================ */
.results-area { animation: fadeUp 0.4s ease; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.results-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  flex-wrap: wrap; gap: 16px; margin-bottom: 28px;
}
.results-badge {
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 500;
  background: var(--accent-dim); color: var(--accent);
  border: 1px solid rgba(212,168,75,0.3); border-radius: 20px;
  padding: 3px 10px; display: inline-block; margin-bottom: 8px;
  text-transform: uppercase; letter-spacing: 0.08em;
}
.results-title {
  font-family: var(--font-serif); font-size: 1.9rem; font-weight: 700;
  color: var(--text-primary); line-height: 1.2;
}

.results-actions { display: flex; gap: 8px; flex-shrink: 0; }
.action-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  background: var(--ink-3); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 0.82rem; font-family: var(--font-mono);
  cursor: pointer; transition: var(--transition); text-decoration: none;
}
.action-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.action-btn.saved { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

/* Summary Card */
.summary-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 28px;
  position: relative; overflow: hidden;
}
.summary-card::before {
  content: '"';
  position: absolute; top: 12px; right: 24px;
  font-family: var(--font-serif); font-size: 6rem;
  color: rgba(212,168,75,0.06); line-height: 1;
}
.summary-label {
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 500;
  color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.summary-text {
  color: var(--text-primary); font-size: 1.02rem;
  line-height: 1.8; font-weight: 300;
}

/* Sections */
.sections-area { display: flex; flex-direction: column; gap: 16px; margin-bottom: 28px; }

.section-card {
  background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: var(--transition);
}
.section-card:hover { border-color: var(--border-hover); }

.section-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; cursor: pointer; width: 100%;
  background: none; border: none; color: var(--text-primary); text-align: left;
}
.section-toggle-title {
  font-family: var(--font-serif); font-size: 1.05rem;
  color: var(--text-primary); font-weight: 600;
}
.section-toggle-icon {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--ink-3); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: var(--transition); color: var(--text-muted);
  font-size: 0.8rem;
}
.section-toggle:hover .section-toggle-icon { border-color: var(--accent); color: var(--accent); }

.section-body {
  padding: 0 20px 20px; display: none;
  color: var(--text-secondary); font-size: 0.92rem; line-height: 1.8;
}
.section-body.open { display: block; animation: fadeIn 0.2s ease; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Related */
.related-area { margin-bottom: 32px; }
.related-title { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px; }
.related-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.related-chip {
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-secondary); border-radius: 20px;
  padding: 6px 14px; font-size: 0.8rem; font-family: var(--font-body);
  cursor: pointer; transition: var(--transition);
}
.related-chip:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-dim); }

/* ============================================
   HISTORY & SAVED
   ============================================ */
.clear-btn {
  padding: 8px 18px; border-radius: var(--radius-sm);
  background: transparent; border: 1px solid var(--border);
  color: var(--text-muted); font-size: 0.8rem; font-family: var(--font-mono);
  cursor: pointer; transition: var(--transition); flex-shrink: 0;
}
.clear-btn:hover { border-color: var(--red); color: var(--red); }

.list-area { display: flex; flex-direction: column; gap: 12px; }

.empty-list { color: var(--text-muted); font-size: 0.9rem; padding: 40px; text-align: center; font-family: var(--font-mono); }

.list-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 22px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; transition: var(--transition); cursor: pointer;
}
.list-card:hover { border-color: var(--border-hover); background: var(--surface-2); }
.list-card-left { flex: 1; min-width: 0; }
.list-card-title { font-family: var(--font-serif); font-size: 1rem; color: var(--text-primary); margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.list-card-sub { font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-mono); }
.list-card-btn {
  background: var(--ink-3); border: 1px solid var(--border);
  color: var(--text-muted); border-radius: var(--radius-sm);
  padding: 6px 12px; font-size: 0.75rem; font-family: var(--font-mono);
  cursor: pointer; transition: var(--transition); flex-shrink: 0;
}
.list-card-btn:hover { border-color: var(--accent); color: var(--accent); }
.del-btn:hover { border-color: var(--red); color: var(--red); }

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--ink-3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .sidebar { width: 220px; }
  .main-content { margin-left: 220px; padding: 24px; }
}

@media (max-width: 640px) {
  .sidebar { position: static; width: 100%; border-right: none; border-bottom: 1px solid var(--border); padding: 20px 16px; flex-direction: row; flex-wrap: wrap; align-items: center; }
  .sidebar-nav { flex-direction: row; }
  .app-wrapper { flex-direction: column; }
  .main-content { margin-left: 0; padding: 20px 16px; max-width: 100vw; }
  .quick-topics { display: none; }
  .sidebar-stats { display: none; }
  .sidebar-footer { display: none; }
}