:root {
  --bg: #f0f4f8;
  --surface: #fff;
  --primary: #1a365d;
  --primary-light: #2c5282;
  --accent: #c53030;
  --text: #1a202c;
  --muted: #718096;
  --radius: 12px;
  --safe-bottom: env(safe-area-inset-bottom, 0);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-bottom: calc(1rem + var(--safe-bottom));
}

.login-screen {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: var(--primary);
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.login-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.35rem;
  color: var(--primary);
}

.login-hint {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.login-card label {
  display: block;
  margin-bottom: 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.login-card input[type="text"],
.login-card input[type="password"] {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.7rem 0.75rem;
  border: 1px solid #cbd5e0;
  border-radius: 8px;
  font-size: 1rem;
}

.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 0.5rem;
  font-weight: 400 !important;
  margin-bottom: 1rem !important;
}

.checkbox-label input {
  width: auto;
  margin: 0;
}

.login-card .btn {
  width: 100%;
}

.tab-logout {
  flex: 0 0 auto;
  min-width: 3rem;
  opacity: 0.85;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 1rem;
  padding-bottom: calc(1rem + var(--safe-bottom));
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 1.25rem;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
}

.modal-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--primary);
}

.modal-card label {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.modal-card input[type="email"] {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid #cbd5e0;
  border-radius: 8px;
  font-size: 1rem;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
}

.modal-actions .btn {
  width: 100%;
}

.access-log-section {
  margin-top: 1.5rem;
}

.access-log-list {
  font-size: 0.8rem;
  max-height: 200px;
  overflow-y: auto;
}

.access-log-list table {
  width: 100%;
  border-collapse: collapse;
}

.access-log-list th,
.access-log-list td {
  text-align: left;
  padding: 0.35rem 0.25rem;
  border-bottom: 1px solid #e2e8f0;
  vertical-align: top;
}

.access-log-list th {
  color: var(--muted);
  font-weight: 500;
}

.access-log-list .ip-new {
  color: var(--accent);
  font-weight: 600;
}

.header {
  background: var(--primary);
  color: #fff;
  padding: 1rem 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header h1 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.tabs {
  display: flex;
  gap: 0.25rem;
}

.tab {
  flex: 1;
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  padding: 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
}

.tab.active {
  background: var(--bg);
  color: var(--primary);
}

#app {
  padding: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.card-item {
  cursor: pointer;
  transition: transform 0.15s;
}

.card-item:active {
  transform: scale(0.98);
}

.card-item h3 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
  color: var(--primary);
}

.card-item .meta {
  color: var(--muted);
  font-size: 0.875rem;
}

.form fieldset {
  border: none;
  margin: 0 0 1rem;
  padding: 0;
}

.form legend {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.form label {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.form input {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid #cbd5e0;
  border-radius: 8px;
  font-size: 1rem;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.optional {
  font-weight: 400;
  color: var(--muted);
}

.line-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
  border: 1px solid #e2e8f0;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
}

.btn.secondary {
  background: #e2e8f0;
  color: var(--text);
}

.btn.danger {
  background: #fed7d7;
  color: var(--accent);
}

.btn.small {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
}

.btn.back {
  background: transparent;
  color: var(--primary);
  padding: 0.5rem 0;
  margin-bottom: 0.5rem;
}

.form-actions,
.detail-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
}

.detail-actions .btn {
  width: 100%;
}

.hint {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

.preview {
  font-size: 1rem;
  color: var(--primary);
  font-weight: 600;
}

.badge {
  font-size: 0.8rem;
  padding: 0.5rem;
  border-radius: 6px;
  background: #c6f6d5;
  color: #22543d;
}

.badge.off {
  background: #feebc8;
  color: #7b341e;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 2rem;
}

.hidden {
  display: none !important;
}

.message {
  margin-top: 0.75rem;
  padding: 0.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
}

.message.ok {
  background: #c6f6d5;
  color: #22543d;
}

.message.err {
  background: #fed7d7;
  color: #742a2a;
}

.detail-block {
  margin-bottom: 0.75rem;
}

.detail-block dt {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
}

.detail-block dd {
  margin: 0.15rem 0 0;
}

.lines-table {
  width: 100%;
  font-size: 0.875rem;
  border-collapse: collapse;
  margin-top: 0.5rem;
}

.lines-table th,
.lines-table td {
  text-align: left;
  padding: 0.35rem 0.25rem;
  border-bottom: 1px solid #e2e8f0;
}

.lines-table th {
  color: var(--muted);
  font-weight: 500;
}