:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --border: #e1e4e8;
  --text: #1f2328;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --success-text: #166534;
  --danger-bg: #fee2e2;
  --danger-text: #991b1b;
  --pending-bg: #fef3c7;
  --pending-text: #92400e;
}

[data-theme="dark"] {
  --bg: #0f1115;
  --card: #1a1d23;
  --border: #2b2f38;
  --text: #e8eaed;
  --muted: #9aa1ac;
  --primary: #3b82f6;
  --primary-dark: #60a5fa;
  --danger: #f87171;
  --success: #4ade80;
  --success-bg: #14321f;
  --success-text: #86efac;
  --danger-bg: #3a1a1a;
  --danger-text: #fca5a5;
  --pending-bg: #3a2f14;
  --pending-text: #fcd34d;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --card: #1a1d23;
    --border: #2b2f38;
    --text: #e8eaed;
    --muted: #9aa1ac;
    --primary: #3b82f6;
    --primary-dark: #60a5fa;
    --danger: #f87171;
    --success: #4ade80;
    --success-bg: #14321f;
    --success-text: #86efac;
    --danger-bg: #3a1a1a;
    --danger-text: #fca5a5;
    --pending-bg: #3a2f14;
    --pending-text: #fcd34d;
  }
}

* { box-sizing: border-box; }

body { transition: background-color 0.15s ease, color 0.15s ease; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.navbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
}

.navbar .brand {
  font-weight: 600;
  font-size: 1.1rem;
}

.navbar .nav-right {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.nav-menu { position: relative; display: flex; align-items: center; }

.burger-btn {
  -webkit-appearance: none;
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  cursor: pointer;
}

.burger-btn span {
  display: block;
  width: 18px;
  height: 2px;
  flex: none;
  background: var(--text);
  border-radius: 1px;
}

.nav-menu-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 160px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  padding: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  z-index: 20;
}

.nav-menu-dropdown[hidden] { display: none; }

.nav-menu-dropdown a {
  padding: 0.5rem 0.7rem;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
}

.nav-menu-dropdown a:hover { background: var(--bg); }
.nav-menu-dropdown a.active { background: var(--primary); color: #fff; }

.container {
  max-width: 1000px;
  margin: 1.5rem auto;
  padding: 0 1rem;
}

@media (max-width: 480px) {
  .navbar { justify-content: center; text-align: center; }
  .navbar .nav-right { justify-content: center; width: 100%; }
  .live-clock { font-size: 0.85rem; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

h1 { font-size: 1.5rem; margin-top: 0; }
h2 { font-size: 1.1rem; margin-top: 0; }

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.table-responsive table { min-width: 520px; }

@media (max-width: 720px) {
  .table-responsive { overflow-x: visible; }
  .table-responsive table {
    min-width: 0;
    width: 100%;
    table-layout: fixed;
    font-size: 0.78rem;
  }
  .table-responsive th, .table-responsive td {
    padding: 0.4rem 0.3rem;
    word-wrap: break-word;
  }
  .table-responsive .actions {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
  }
  .table-responsive .actions .btn {
    padding: 0.3rem 0.2rem;
    font-size: 0.68rem;
    text-align: center;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .table-responsive table { font-size: 0.7rem; }
  .table-responsive th, .table-responsive td { padding: 0.35rem 0.25rem; }
}

th, td {
  text-align: left;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-pending { background: var(--pending-bg); color: var(--pending-text); }
.badge-confirmed { background: var(--success-bg); color: var(--success-text); }
.badge-cancelled { background: var(--danger-bg); color: var(--danger-text); }

form .field { margin-bottom: 1rem; }
form label { display: block; margin-bottom: 0.3rem; font-size: 0.85rem; color: var(--muted); }
form input, form select, form textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary { background: var(--border); color: var(--text); }

.actions { display: flex; gap: 0.5rem; }

.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.messages li {
  padding: 0.6rem 1rem;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}
.messages .success { background: var(--success-bg); color: var(--success-text); }
.messages .error { background: var(--danger-bg); color: var(--danger-text); }

.theme-toggle {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
.theme-toggle:hover { color: var(--text); }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1.5rem;
}
.modal-backdrop[hidden] { display: none; }

.modal-box {
  background: var(--card);
  border-radius: 8px;
  padding: 1.5rem;
  max-width: 320px;
  width: 100%;
  text-align: center;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}
.modal-box p { margin: 0 0 1.25rem; font-size: 1rem; color: var(--text); }

.modal-actions { display: flex; justify-content: center; gap: 0.75rem; }
.modal-actions .btn { min-width: 80px; }

.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem;
}

.login-card { width: 100%; max-width: 360px; min-width: 0; }
.login-card form > button[type="submit"] {
  display: block;
  margin: 1.25rem auto 0;
}

.errorlist { color: var(--danger); font-size: 0.85rem; padding-left: 1rem; margin: 0.2rem 0; }

.password-field { position: relative; }
.password-field input { padding-right: 3.5rem; }
.password-toggle {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  padding: 0.25rem 0.5rem;
  border: none;
  background: none;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 4px;
}
.password-toggle:hover { color: var(--text); background: var(--bg); }

.field-checkbox label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text);
}
.field-checkbox input { width: auto; }

.live-clock {
  font-variant-numeric: tabular-nums;
  color: var(--text);
  font-weight: 600;
}

.element-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 900px) {
  .element-grid {
    grid-auto-flow: column;
    grid-template-columns: unset;
    grid-auto-columns: minmax(110px, 1fr);
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
}

.element-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  background: var(--bg);
  min-width: 0;
}

@media (min-width: 900px) {
  .element-card { min-width: 110px; }
}

.element-card label {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.element-input { display: flex; align-items: center; gap: 0.5rem; }
.element-input input { flex: 1; font-size: 1.2rem; padding: 0.6rem; }
.element-input .unit { color: var(--muted); font-weight: 600; }

.btn-large { font-size: 1.05rem; padding: 0.75rem 1.5rem; }

.btn-centered { display: block; margin: 0 auto; }

.period-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.period-links {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px;
  flex: 1 1 auto;
  min-width: 0;
}

.period-link {
  flex: 0 0 auto;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  font-size: 0.9rem;
}

.date-picker {
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.9rem;
  background: var(--card);
  color: var(--text);
}

.period-link.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.export-links { margin-left: auto; display: flex; gap: 0.5rem; }

.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.chart-wide { grid-column: 1 / -1; }

@media (max-width: 720px) {
  .chart-grid { grid-template-columns: 1fr; }
}