:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4d;
  --text: #e7edf4;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --sidebar-w: 220px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

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

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.login-card h1 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
}

.login-card p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.field {
  margin-bottom: 1rem;
}
.field label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.field input,
.field select {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
}
.btn-primary:hover {
  background: var(--accent-hover);
}
.btn-secondary {
  background: var(--border);
  color: var(--text);
}
.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
}
.btn-small {
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
}

.error-msg {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid var(--danger);
  color: #fca5a5;
  padding: 0.65rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1rem 0;
  display: flex;
  flex-direction: column;
}

.sidebar-title {
  padding: 0 1rem 1rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.nav-section {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0.5rem 1rem;
}

.sidebar a.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  border-left: 3px solid transparent;
}
.sidebar a.nav-link:hover {
  background: rgba(255, 255, 255, 0.04);
  text-decoration: none;
}
.sidebar a.nav-link.active {
  border-left-color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
  color: #93c5fd;
}

.sidebar-footer {
  margin-top: auto;
  padding: 1rem;
  border-top: 1px solid var(--border);
}

.main {
  flex: 1;
  padding: 1.5rem;
  overflow: auto;
}

.main h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
th,
td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
th {
  color: var(--muted);
  font-weight: 500;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1rem;
}
.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  margin-bottom: 0.75rem;
}
.form-row .field {
  margin: 0;
  flex: 1;
  min-width: 140px;
}

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

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.preview-img {
  max-width: 120px;
  max-height: 80px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.page-header h2 {
  margin: 0;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.55);
}

.modal-dialog {
  width: 100%;
  max-width: 440px;
  max-height: calc(100vh - 2rem);
  overflow: auto;
  padding: 1.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

.modal-dialog h3 {
  margin: 0 0 1.1rem;
  font-size: 1.1rem;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1.25rem;
}