:root {
  --bg-primary: #fffdf7;
  --bg-card: #ffffff;
  --bg-accent: #fef9e7;
  --bg-secondary: #f5f0ff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888a4;
  --primary: #7c3aed;
  --primary-hover: #6d28d9;
  --primary-light: #a78bfa;
  --secondary: #fbbf24;
  --secondary-hover: #f59e0b;
  --pink: #f472b6;
  --coral: #fb7185;
  --green: #34d399;
  --green-dark: #059669;
  --blue: #60a5fa;
  --yellow: #fbbf24;
  --orange: #fb923c;
  --border: #e5e1f0;
  --card-bg: #ffffff;
  --shadow-sm: 0 1px 3px rgba(124, 58, 237, 0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(124, 58, 237, 0.1), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 30px rgba(124, 58, 237, 0.12);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 50px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --gradient-hero: linear-gradient(135deg, #fef9e7 0%, #f5f0ff 50%, #fce7f3 100%);
  --gradient-card: linear-gradient(135deg, #f5f0ff 0%, #fef9e7 100%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f0a1a;
    --bg-card: #1a1428;
    --bg-accent: #231d35;
    --bg-secondary: #1f1833;
    --text-primary: #f5f0ff;
    --text-secondary: #c4b5e0;
    --text-muted: #8878a8;
    --border: #2d2545;
    --card-bg: #1a1428;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
    --gradient-hero: linear-gradient(135deg, #1a1428 0%, #231d35 50%, #1f1833 100%);
    --gradient-card: linear-gradient(135deg, #1f1833 0%, #231d35 100%);
  }
}

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

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

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* ── Navigation ─────────────────────────────────────────── */
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(10px);
}
.navbar-brand {
  font-size: 1.3rem; font-weight: 800; color: var(--primary);
  display: flex; align-items: center; gap: 8px; white-space: nowrap;
}
.navbar-links { display: flex; gap: 16px; align-items: center; }
.navbar-links a {
  color: var(--text-secondary); font-weight: 600; font-size: 0.9rem;
  transition: color 0.2s; padding: 6px 12px; border-radius: var(--radius-sm);
}
.navbar-links a:hover { color: var(--primary); background: var(--bg-accent); }
.navbar-toggle {
  display: none; background: none; border: none; font-size: 1.5rem;
  cursor: pointer; color: var(--text-primary); padding: 4px 8px;
}
.navbar-right { display: flex; align-items: center; gap: 4px; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 24px; border-radius: var(--radius-full);
  font-weight: 700; font-size: 0.9rem; border: none; cursor: pointer;
  transition: all 0.2s; text-decoration: none; white-space: nowrap;
  touch-action: manipulation; -webkit-tap-highlight-color: transparent;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--bg-accent); color: var(--primary); border: 2px solid var(--border); }
.btn-secondary:hover { background: var(--bg-secondary); border-color: var(--primary-light); }
.btn-danger { background: var(--coral); color: #fff; }
.btn-danger:hover { opacity: 0.85; }
.btn-success { background: var(--green); color: #fff; }
.btn-success:hover { background: var(--green-dark); }
.btn-yellow { background: var(--secondary); color: #1a1a2e; }
.btn-yellow:hover { background: var(--secondary-hover); transform: translateY(-1px); }
.btn-sm { padding: 6px 16px; font-size: 0.8rem; }

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden; transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-img {
  width: 100%; height: 200px; object-fit: cover;
  background: var(--bg-accent);
}
.card-body { padding: 20px; }
.card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.card-meta {
  font-size: 0.85rem; color: var(--text-muted);
  display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 8px;
}

/* ── Grid layouts ───────────────────────────────────────── */
.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px; padding: 24px;
}

/* ── Container ──────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 640px; margin: 0 auto; padding: 0 24px; }

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  text-align: center; padding: 80px 24px 60px;
  background: var(--gradient-hero);
}
.hero h1 { font-size: 3rem; font-weight: 800; color: var(--text-primary); margin-bottom: 16px; }
.hero p { font-size: 1.15rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto 32px; }

/* ── Forms ──────────────────────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.9rem; }
.form-input {
  width: 100%; padding: 12px 16px; border: 2px solid var(--border);
  border-radius: var(--radius-sm); font-size: 1rem;
  background: var(--bg-card); color: var(--text-primary);
  transition: border-color 0.2s;
}
.form-input:focus { outline: none; border-color: var(--purple); }
textarea.form-input { min-height: 100px; resize: vertical; }
input[type="date"]::-webkit-calendar-picker-indicator,
input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(0.4);
  cursor: pointer;
}
@media (prefers-color-scheme: dark) {
  input[type="date"]::-webkit-calendar-picker-indicator,
  input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    filter: invert(0.7);
  }
}

/* ── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
}
.badge-purple { background: var(--bg-secondary); color: var(--primary); }
.badge-green { background: #dcfce7; color: var(--green-dark); }
.badge-coral { background: #ffe4e6; color: #be123c; }

/* ── Chat ───────────────────────────────────────────────── */
.chat-container { display: flex; flex-direction: column; height: calc(100vh - 140px); }
.chat-messages {
  flex: 1; overflow-y: auto; padding: 20px;
  display: flex; flex-direction: column; gap: 12px;
}
.chat-bubble {
  max-width: 80%; padding: 12px 16px;
  border-radius: var(--radius-md); font-size: 0.95rem;
}
.chat-bubble.mine {
  align-self: flex-end; background: var(--primary); color: #fff;
  border-bottom-right-radius: 4px;
}
.chat-bubble.other {
  align-self: flex-start; background: var(--bg-secondary);
  border-bottom-left-radius: 4px;
}
.chat-bubble.ai {
  align-self: flex-start; background: var(--bg-secondary);
  border-left: 3px solid var(--primary); border-bottom-left-radius: 4px;
}
.chat-bubble .chat-meta {
  font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px;
}
.chat-input-bar {
  display: flex; gap: 12px; padding: 16px 20px;
  background: var(--bg-card); border-top: 1px solid var(--border);
}
.chat-input-bar input { flex: 1; }

/* ── Suggestion card ────────────────────────────────────── */
.suggestion-card { border: 2px solid var(--border); }
.suggestion-card .actions { display: flex; gap: 8px; margin-top: 12px; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .hero { padding: 60px 16px 40px; }
  .event-grid { grid-template-columns: 1fr; padding: 16px; gap: 16px; }
  .navbar { padding: 12px 16px; }
  .navbar-toggle { display: block; }
  .navbar-links {
    display: none; flex-direction: column; position: absolute;
    top: 100%; left: 0; right: 0; background: var(--bg-card);
    border-bottom: 1px solid var(--border); padding: 12px 16px;
    gap: 4px; box-shadow: var(--shadow-md);
  }
  .navbar-links.open { display: flex; }
  .navbar-links a { width: 100%; padding: 10px 12px; }
  .navbar-links form { width: 100%; }
  .navbar-links form .btn { width: 100%; justify-content: center; }
  .container, .container-sm { padding: 0 16px; }
  .dash-grid { grid-template-columns: 1fr; }
  .ev-hero { height: 200px; }
  .ev-meta { gap: 10px; font-size: 0.85rem; }
  .ev-actions { flex-direction: column; }
  .ev-actions .btn { width: 100%; justify-content: center; }
  .chat-input-bar { padding: 12px; gap: 8px; }
  .alert-row { flex-wrap: wrap; }
}

@media (max-width: 480px) {
  .hero { padding: 40px 16px 28px; }
  .hero h1 { font-size: 1.5rem; }
  .hero p { font-size: 0.9rem; }
  .btn { padding: 10px 18px; font-size: 0.85rem; }
  .btn-sm { padding: 8px 14px; }
  .chat-bubble { max-width: 90%; }
  .card-body { padding: 14px; }
  .ev-hero { height: 160px; margin-bottom: 16px; }
  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.2rem; }
  .attendee-list { gap: 6px; }
  .attendee-chip { font-size: 0.8rem; padding: 3px 10px; }
  .dash-card { padding: 20px 16px; }
  .dash-icon { font-size: 1.8rem; }
  .navbar-brand { font-size: 1.1rem; }
}

/* ── Utility ────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.p-24 { padding: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.hidden { display: none; }

/* ── Loading spinner ────────────────────────────────────── */
.spinner {
  width: 32px; height: 32px; border: 3px solid var(--border);
  border-top-color: var(--primary); border-radius: 50%;
  animation: spin 0.8s linear infinite; margin: 32px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Toast notifications ────────────────────────────────── */
.toast {
  position: fixed; top: 24px; right: 24px; padding: 14px 24px;
  border-radius: var(--radius-full); color: #fff; font-weight: 700;
  z-index: 9999; animation: slideIn 0.3s ease; font-size: 0.9rem;
}
.toast-success { background: var(--green); }
.toast-error { background: var(--coral); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── Dashboard ──────────────────────────────────────────── */
.dash-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px; margin-top: 24px;
}
.dash-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 28px 24px; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: 12px;
  transition: all 0.25s; border: 2px solid transparent; cursor: pointer;
  text-decoration: none; color: var(--text-primary);
}
.dash-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.dash-card.featured {
  background: var(--gradient-card); border-color: var(--primary-light);
}
.dash-icon { font-size: 2.2rem; }
.dash-card h3 { font-size: 1.1rem; font-weight: 700; }
.dash-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }