:root {
  --bg: #f3f6fb;
  --surface: #fff;
  --surface-soft: #f8fafc;
  --text: #172033;
  --muted: #64748b;
  --border: #dbe4f0;
  --item-border: #e2e8f0;
  --primary: #0f5f9f;
  --primary-soft: #e0f2fe;
  --sidebar-start: #123d64;
  --sidebar-end: #0c243f;
  --shadow: rgba(15, 23, 42, 0.08);
  --strong-shadow: rgba(15, 23, 42, 0.14);
  color: var(--text);
  background: var(--bg);
  font-family: Inter, Arial, sans-serif;
}

[data-theme="dark"] {
  --bg: #07111f;
  --surface: #101b2d;
  --surface-soft: #15243a;
  --text: #e5edf8;
  --muted: #9fb0c7;
  --border: #263650;
  --item-border: #2f405c;
  --primary: #22a9e8;
  --primary-soft: #123853;
  --sidebar-start: #071827;
  --sidebar-end: #040b13;
  --shadow: rgba(0, 0, 0, 0.28);
  --strong-shadow: rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  padding: 28px;
  color: #fff;
  background: linear-gradient(180deg, var(--sidebar-start), var(--sidebar-end));
}

.brand-logo {
  display: block;
  width: 100%;
  max-width: 210px;
  margin: 0 auto 24px;
  border-radius: 16px;
}

.sidebar a {
  display: block;
  margin: 10px 0;
  padding: 12px 14px;
  color: #d7e8ff;
  text-decoration: none;
  border-radius: 12px;
}

.sidebar a:hover,
.sidebar a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.user-box {
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  line-height: 1.5;
}

.logout-button {
  margin-top: 20px;
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
}

main {
  padding: 76px 32px 32px;
}

.theme-toggle-panel {
  position: absolute;
  top: 18px;
  right: 22px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 12px 30px var(--shadow);
  backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 800;
}

.theme-switch {
  position: relative;
  display: inline-flex;
  width: 52px;
  height: 28px;
  margin: 0;
  cursor: pointer;
}

.theme-switch input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.theme-slider {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: #cbd5e1;
  transition: background 0.2s ease;
}

.theme-slider::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.22);
  transition: transform 0.2s ease;
}

.theme-switch input:checked + .theme-slider {
  background: var(--primary);
}

.theme-switch input:checked + .theme-slider::before {
  transform: translateX(24px);
}

.header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 24px;
}

.header h2 {
  margin: 0;
  font-size: 34px;
}

.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card,
.panel {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 16px 40px var(--shadow);
}

.card strong {
  display: block;
  margin-top: 8px;
  font-size: 32px;
}

.panel {
  margin-top: 20px;
}

label {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
  font-weight: 700;
}

input,
select,
textarea,
button {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
}

input,
select,
textarea {
  color: var(--text);
  background: var(--surface);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

button {
  cursor: pointer;
  color: #fff;
  border: 0;
  background: var(--primary);
  font-weight: 800;
}

.button-link {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  padding: 12px 14px;
  text-decoration: none;
  font-weight: 800;
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

button.is-loading {
  position: relative;
}

button.is-loading::after {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-left: 8px;
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-top-color: #fff;
  border-radius: 999px;
  vertical-align: -2px;
  animation: spin 0.8s linear infinite;
}

button.secondary {
  color: var(--primary);
  background: var(--primary-soft);
}

.button-link.secondary {
  color: var(--primary);
  background: var(--primary-soft);
}

.compact-header {
  margin-bottom: 12px;
}

.billing-form {
  display: grid;
  gap: 12px;
}

.row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.list {
  display: grid;
  gap: 12px;
}

.item {
  padding: 16px;
  border: 1px solid var(--item-border);
  border-radius: 16px;
  background: var(--surface-soft);
}

.item h3 {
  margin: 0 0 8px;
}

.message {
  display: grid;
  gap: 8px;
}

.admin-summary {
  margin-bottom: 20px;
}

.admin-user {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: 20px;
}

.admin-form textarea {
  min-height: 82px;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
  margin: 12px 0;
}

.photo-grid img {
  width: 100%;
  height: 110px;
  border-radius: 12px;
  object-fit: cover;
}

.badge {
  display: inline-block;
  width: fit-content;
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 12px;
  font-weight: 800;
}

.info-box {
  margin: 18px 0;
  padding: 16px;
  border: 1px dashed var(--primary);
  border-radius: 14px;
  background: var(--primary-soft);
}

.info-box p {
  overflow-wrap: anywhere;
  color: var(--primary);
  font-weight: 800;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.qr-box {
  display: grid;
  justify-items: center;
  gap: 10px;
  margin-top: 20px;
  padding: 20px;
  border-radius: 18px;
  background: var(--surface-soft);
}

.qr-box img {
  width: min(280px, 100%);
  border: 12px solid var(--surface);
  border-radius: 18px;
  box-shadow: 0 14px 35px var(--strong-shadow);
}

.alert {
  display: none;
  margin: 16px 0;
  padding: 12px;
  border-radius: 12px;
  color: #166534;
  background: #dcfce7;
}

.error-alert {
  color: #991b1b;
  background: #fee2e2;
}

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

.login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(460px, 100%);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 20px 60px var(--strong-shadow);
}

.login-logo {
  display: block;
  width: min(320px, 100%);
  margin: 0 auto 18px;
  border-radius: 16px;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 18px 0;
}

.tabs button {
  color: var(--primary);
  background: var(--primary-soft);
}

.tabs button.active {
  color: #fff;
  background: var(--primary);
}

@media (max-width: 860px) {
  .layout,
  .grid,
  .status-grid,
  .row,
  .admin-user {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
  }

  main {
    padding: 90px 20px 24px;
  }

  .theme-toggle-panel {
    top: 14px;
    right: 14px;
  }
}