/* ============================================
   Book Club Events — Base Styles
   ============================================ */

:root {
  --ink: #1a1a2e;
  --ink-soft: #4a4a6a;
  --muted: #8888a8;
  --line: #e0e0ec;
  --wash: #f4f4fa;
  --white: #ffffff;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-bg: #f0eeff;
  --green: #00b894;
  --green-bg: #e6faf4;
  --red: #e17055;
  --red-bg: #fdecea;
  --orange: #fdcb6e;
  --orange-bg: #fef9e7;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
  --font: 'DM Sans', system-ui, -apple-system, sans-serif;
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--wash);
  -webkit-font-smoothing: antialiased;
}

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

/* ============================================
   Auth Page
   ============================================ */

.auth-page {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem 2rem;
  text-align: center;
}

.auth-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.6rem;
  font-weight: 700;
}

.auth-subtitle {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.auth-form input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
}

.auth-form input:focus {
  border-color: var(--accent);
}

.auth-form button {
  width: 100%;
  padding: 0.75rem;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: opacity 0.2s;
}

.auth-form button:hover { opacity: 0.9; }
.auth-form button:disabled { opacity: 0.5; cursor: default; }

.auth-note {
  margin: 0;
  font-size: 0.85rem;
  min-height: 1.2em;
}

.auth-error { color: var(--red); }

.auth-instruction {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.auth-link-btn {
  background: none !important;
  color: var(--muted) !important;
  font-size: 0.85rem !important;
  font-weight: 400 !important;
  text-decoration: underline;
  cursor: pointer;
}

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* ============================================
   Header / Nav
   ============================================ */

.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--line);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header h1 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.credit-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  background: var(--accent-bg);
  color: var(--accent);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.user-menu {
  font-size: 0.85rem;
  color: var(--muted);
}

.user-menu button {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: underline;
  font-family: var(--font);
}

.user-menu:not([hidden]) ~ #sign-in-link { display: none; }

/* ============================================
   Event Cards
   ============================================ */

.events-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.filter-btn {
  padding: 0.4rem 0.85rem;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink-soft);
  font-size: 0.85rem;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--accent); color: white; border-color: var(--accent); }

.events-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.event-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: box-shadow 0.2s;
  cursor: pointer;
}

.event-card:hover { box-shadow: var(--shadow-lg); }

.event-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.event-card-title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.event-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.event-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.event-card-description {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.event-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
}

/* ============================================
   Badges
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-free { background: var(--green-bg); color: var(--green); }
.badge-paid { background: var(--accent-bg); color: var(--accent); }
.badge-booked { background: var(--green-bg); color: var(--green); }
.badge-waitlisted { background: var(--orange-bg); color: #e67e22; }
.badge-rsvp { background: var(--green-bg); color: var(--green); }
.badge-full { background: var(--red-bg); color: var(--red); }

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { opacity: 0.5; cursor: default; }

.btn-secondary { background: var(--wash); color: var(--ink-soft); border: 1.5px solid var(--line); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-danger { background: var(--red-bg); color: var(--red); }
.btn-danger:hover { opacity: 0.85; }

.btn-success { background: var(--green-bg); color: var(--green); }

.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }

.btn-buy {
  background: var(--accent);
  color: white;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
}

/* ============================================
   Capacity bar
   ============================================ */

.capacity-bar {
  width: 100%;
  height: 6px;
  background: var(--line);
  border-radius: 3px;
  overflow: hidden;
}

.capacity-bar-fill {
  height: 100%;
  background: var(--green);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.capacity-bar-fill.warning { background: var(--orange); }
.capacity-bar-fill.full { background: var(--red); }

.capacity-text {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ============================================
   Modal
   ============================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: grid;
  place-items: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.modal-overlay.is-active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  width: min(420px, calc(100vw - 2rem));
  max-height: 80vh;
  overflow-y: auto;
}

.modal h2 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
}

.modal p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* ============================================
   Account page
   ============================================ */

.account-section {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.account-section h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.balance-display {
  text-align: center;
  padding: 1.5rem;
}

.balance-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.balance-label {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

/* ============================================
   Transaction list
   ============================================ */

.tx-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tx-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}

.tx-item:last-child { border-bottom: none; }

.tx-amount { font-weight: 600; }
.tx-amount.positive { color: var(--green); }
.tx-amount.negative { color: var(--red); }

.tx-type {
  color: var(--muted);
  font-size: 0.8rem;
}

/* ============================================
   Empty state
   ============================================ */

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
}

.empty-state p {
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 600px) {
  .site-header {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }

  .event-card-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}