*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --color-warning-bg: #fffbe6;
  --blue: #1a56db;
  --blue-dark: #1245b8;
  --green: #057a55;
  --red: #c81e1e;
  --yellow: #92400e;
  --bg: #f9fafb;
  --surface: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --stripe-bg: rgba(0,0,0,.025);
}

[data-theme="dark"] {
  --color-warning-bg: rgba(251,191,36,.08);
  --blue: #60a5fa;
  --blue-dark: #3b82f6;
  --green: #34d399;
  --red: #f87171;
  --yellow: #fbbf24;
  --bg: #111827;
  --surface: #1f2937;
  --border: #374151;
  --text: #f9fafb;
  --muted: #9ca3af;
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 1px 2px rgba(0,0,0,.3);
  --stripe-bg: rgba(255,255,255,.04);
}

[data-theme="dark"] .alert-success { background: rgba(52,211,153,.12); border-color: #34d399; }
[data-theme="dark"] .alert-error   { background: rgba(248,113,113,.12); border-color: #f87171; }
[data-theme="dark"] .alert-warning { background: rgba(251,191,36,.12);  border-color: #fbbf24; }
[data-theme="dark"] .badge         { background: rgba(96,165,250,.15); border-color: rgba(96,165,250,.3); }
[data-theme="dark"] .badge-accepted { background: rgba(34,197,94,.15); border-color: rgba(34,197,94,.4); color: #86efac; }
[data-theme="dark"] .badge-pending { background: rgba(251,191,36,.15); border-color: rgba(251,191,36,.4); color: #fbbf24; }
[data-theme="dark"] .badge-expired { background: rgba(248,113,113,.15); border-color: rgba(248,113,113,.4); color: #f87171; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

/* ── Navbar ── */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  height: 56px;
  gap: 24px;
}
.navbar-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--blue);
  flex-shrink: 0;
}
.navbar-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}
.navbar-nav a {
  padding: 6px 12px;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  transition: background 0.15s;
}
.navbar-nav a:hover, .navbar-nav a.active {
  background: var(--bg);
  color: var(--text);
}
.navbar-nav a.active { font-weight: 600; }
.navbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--muted);
  flex-shrink: 0;
}
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text);
  padding: 4px 8px;
  margin-left: auto;
  line-height: 1;
}

@media (max-width: 640px) {
  .navbar {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 16px;
    gap: 0;
  }
  .navbar-brand { flex: 1; }
  .navbar-toggle { display: block; }
  .navbar-nav,
  .navbar-user {
    display: none;
    width: 100%;
  }
  .navbar.open .navbar-nav {
    display: flex;
    flex-direction: column;
    padding: 8px 0 4px;
    gap: 2px;
  }
  .navbar.open .navbar-user {
    display: flex;
    padding: 10px 0 4px;
    border-top: 1px solid var(--border);
    margin-top: 4px;
  }
  .navbar-nav a {
    padding: 10px 12px;
  }
}
.btn-link {
  color: var(--blue);
  text-decoration: none;
  font-size: 0.85rem;
}
.btn-link:hover { text-decoration: underline; }
.theme-picker {
  font-size: 0.8rem;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

/* ── Demo banner ── */
.demo-banner {
  background: #fffbeb;
  border-bottom: 1px solid #fcd34d;
  color: #92400e;
  font-size: 0.875rem;
  padding: 10px 24px;
  text-align: center;
}
[data-theme="dark"] .demo-banner {
  background: rgba(251,191,36,.1);
  border-color: rgba(251,191,36,.35);
  color: #fbbf24;
}

/* ── Layout ── */
.container {
  max-width: 780px;
  margin: 32px auto;
  padding: 0 20px;
}
.container-md {
  max-width: 1050px;
  margin: 32px auto;
  padding: 0 20px;
}
.container-wide {
  max-width: 1280px;
  margin: 32px auto;
  padding: 0 20px;
}
.page-header { margin-bottom: 24px; }
.page-header h1 { font-size: 1.5rem; font-weight: 700; }

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.table-card { padding: 0; overflow-x: auto; }
.empty-state { text-align: center; color: var(--muted); padding: 48px; }

/* ── Alerts ── */
.alert {
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.alert-success { background: #f0fdf4; border: 1px solid #86efac; color: var(--green); }
.alert-error   { background: #fef2f2; border: 1px solid #fca5a5; color: var(--red); }
.alert-warning { background: #fffbeb; border: 1px solid #fcd34d; color: var(--yellow); }

/* ── Forms ── */
.form-card { max-width: 540px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 6px;
}
.hint { font-weight: 400; color: var(--muted); }
.form-group input[type="text"],
.form-group input[type="email"] {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  transition: border-color 0.15s;
}
.form-group input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26,86,219,.15);
}
.input-group { display: flex; align-items: center; }
.input-group input { border-radius: var(--radius) 0 0 var(--radius); flex: 1; }
.input-suffix {
  padding: 9px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

/* ── Checkboxes ── */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  cursor: pointer;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background 0.1s;
}
.checkbox-label:hover { background: var(--bg); }
.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
}

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 9px 20px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background 0.15s;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg); }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #a61919; }
.btn-block { display: block; text-align: center; width: 100%; }

/* ── Table ── */
.table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.table th {
  background: var(--bg);
  padding: 10px 16px;
  text-align: left;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--bg); }
.table-striped tbody tr:nth-child(even) { background: var(--stripe-bg); }
.table-striped tbody tr:nth-child(even):hover { background: var(--bg); }
.nowrap { white-space: nowrap; }

/* ── Badges / Status ── */
.badge {
  display: inline-block;
  background: #eff6ff;
  color: var(--blue);
  border: 1px solid #bfdbfe;
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.75rem;
  font-weight: 600;
  margin: 1px 2px 1px 0;
}
.status { font-weight: 600; font-size: 0.8rem; }
.status-sent { color: var(--green); }
.status-email_failed { color: var(--yellow); }
.status-failed { color: var(--red); }
.status-log_cleared { color: var(--muted); }
.badge-accepted { background:#dcfce7; color:#15803d; border-color:#bbf7d0; }
.badge-pending { background:#fffbeb; color:#92400e; border-color:#fcd34d; }
.badge-expired { background:#fef2f2; color:#c81e1e; border-color:#fca5a5; }

/* ── Badge colour palette (8 hues, light + dark) ── */
.badge-color-0 { background:#dbeafe; color:#1e40af; border-color:#bfdbfe; }
.badge-color-1 { background:#dcfce7; color:#15803d; border-color:#bbf7d0; }
.badge-color-2 { background:#f3e8ff; color:#7e22ce; border-color:#e9d5ff; }
.badge-color-3 { background:#ffedd5; color:#c2410c; border-color:#fed7aa; }
.badge-color-4 { background:#fce7f3; color:#be185d; border-color:#fbcfe8; }
.badge-color-5 { background:#ccfbf1; color:#0f766e; border-color:#99f6e4; }
.badge-color-6 { background:#fef9c3; color:#854d0e; border-color:#fef08a; }
.badge-color-7 { background:#fee2e2; color:#991b1b; border-color:#fecaca; }

[data-theme="dark"] .badge-color-0 { background:rgba(59,130,246,.2); color:#93c5fd; border-color:rgba(59,130,246,.35); }
[data-theme="dark"] .badge-color-1 { background:rgba(34,197,94,.2); color:#86efac; border-color:rgba(34,197,94,.35); }
[data-theme="dark"] .badge-color-2 { background:rgba(168,85,247,.2); color:#d8b4fe; border-color:rgba(168,85,247,.35); }
[data-theme="dark"] .badge-color-3 { background:rgba(249,115,22,.2); color:#fdba74; border-color:rgba(249,115,22,.35); }
[data-theme="dark"] .badge-color-4 { background:rgba(236,72,153,.2); color:#f9a8d4; border-color:rgba(236,72,153,.35); }
[data-theme="dark"] .badge-color-5 { background:rgba(20,184,166,.2); color:#5eead4; border-color:rgba(20,184,166,.35); }
[data-theme="dark"] .badge-color-6 { background:rgba(234,179,8,.2); color:#fde047; border-color:rgba(234,179,8,.35); }
[data-theme="dark"] .badge-color-7 { background:rgba(239,68,68,.2); color:#fca5a5; border-color:rgba(239,68,68,.35); }

/* ── Pagination ── */
.pagination {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
  font-size: 0.875rem;
}

/* ── Misc ── */
.text-muted { color: var(--muted); }
.small { font-size: 0.8rem; }

/* ── Modal ── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  padding: 28px;
  width: 100%;
  max-width: 440px;
  margin: 20px;
}
.modal h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }
.modal-field { margin-bottom: 10px; font-size: 0.9rem; }
.modal-field .label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  display: block;
  margin-bottom: 2px;
}
.modal-actions { display: flex; gap: 12px; margin-top: 24px; justify-content: flex-end; }

/* ── Login page ── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px 40px;
  width: 100%;
  max-width: 380px;
  text-align: center;
}
.login-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 8px;
}
.login-subtitle {
  color: var(--muted);
  margin-bottom: 32px;
  font-size: 0.9rem;
}