/* ===== Variables ===== */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #1c2333;
  --bg-input: #21283b;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-blue: #2f81f7;
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --accent-purple: #a371f7;
  --accent-yellow: #d29922;
  --sidebar-width: 260px;
  --header-height: 60px;
}

[data-theme="light"] {
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f6f8fa;
  --border-color: #d0d7de;
  --text-primary: #1f2328;
  --text-secondary: #656d76;
  --text-muted: #8b949e;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
}

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

/* ===== Layout ===== */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.2s;
}

.sidebar-logo {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}

.sidebar-section {
  padding: 12px 0 4px 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.sidebar-nav { list-style: none; padding: 4px 8px; }

.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  transition: all 0.15s;
}

.sidebar-nav li a:hover { background: var(--bg-card); color: var(--text-primary); text-decoration: none; }
.sidebar-nav li a.active { background: rgba(47, 129, 247, 0.15); color: var(--accent-blue); }
.sidebar-nav li a i { font-size: 16px; width: 20px; text-align: center; }

.main-content { margin-left: var(--sidebar-width); flex: 1; min-height: 100vh; }

/* ===== Header ===== */
.header {
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header h1 { font-size: 18px; font-weight: 600; }
.header-right { display: flex; align-items: center; gap: 12px; }

.btn-theme-toggle {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

.header-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--accent-purple);
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 600; font-size: 13px;
}

/* ===== Content ===== */
.content { padding: 24px; }

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

.page-header h2 { font-size: 20px; font-weight: 600; }

/* ===== Stats ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}

.stat-icon.blue { background: rgba(47, 129, 247, 0.15); color: var(--accent-blue); }
.stat-icon.green { background: rgba(63, 185, 80, 0.15); color: var(--accent-green); }
.stat-icon.red { background: rgba(248, 81, 73, 0.15); color: var(--accent-red); }
.stat-icon.purple { background: rgba(163, 113, 247, 0.15); color: var(--accent-purple); }
.stat-icon.yellow { background: rgba(210, 153, 34, 0.15); color: var(--accent-yellow); }

.stat-info h3 { font-size: 24px; font-weight: 700; line-height: 1; }
.stat-info p { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

/* ===== Tables ===== */
.table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.table-toolbar {
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.search-input {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  width: 250px;
}

.search-input::placeholder { color: var(--text-muted); }
.search-input:focus { outline: none; border-color: var(--accent-blue); }

table { width: 100%; border-collapse: collapse; }

thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

tbody td { padding: 12px 16px; font-size: 13px; border-bottom: 1px solid var(--border-color); }
tbody tr:hover { background: rgba(255, 255, 255, 0.02); }
tbody tr:last-child td { border-bottom: none; }

.table-footer {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
}

/* ===== Badges ===== */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.badge-green { background: rgba(63, 185, 80, 0.15); color: var(--accent-green); }
.badge-red { background: rgba(248, 81, 73, 0.15); color: var(--accent-red); }
.badge-yellow { background: rgba(210, 153, 34, 0.15); color: var(--accent-yellow); }
.badge-blue { background: rgba(47, 129, 247, 0.15); color: var(--accent-blue); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary { background: var(--accent-blue); color: white; }
.btn-primary:hover { background: #1a6fef; }
.btn-success { background: var(--accent-green); color: white; }
.btn-danger { background: var(--accent-red); color: white; }
.btn-secondary { background: var(--bg-input); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-group { display: flex; gap: 4px; }

/* ===== Forms ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }

.form-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
}

.form-control:focus { outline: none; border-color: var(--accent-blue); }
.form-control::placeholder { color: var(--text-muted); }

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b949e' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s;
}

.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 90%; max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 { font-size: 16px; font-weight: 600; }

.modal-close { background: none; border: none; color: var(--text-secondary); font-size: 20px; cursor: pointer; }
.modal-body { padding: 20px; }

.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  display: flex; justify-content: flex-end; gap: 8px;
}

/* ===== Toast ===== */
.toast-container {
  position: fixed; top: 16px; right: 16px; z-index: 300;
  display: flex; flex-direction: column; gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 13px;
  min-width: 280px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.2s ease-out;
}

.toast-success { border-left: 3px solid var(--accent-green); }
.toast-error { border-left: 3px solid var(--accent-red); }

@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ===== Login ===== */
.login-wrapper {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 40px;
  width: 90%; max-width: 400px;
}

.login-card h1 { font-size: 24px; font-weight: 700; margin-bottom: 4px; }
.login-card .subtitle { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }
.login-card .btn-primary { width: 100%; justify-content: center; padding: 10px; }

/* ===== Pagination ===== */
.pagination { display: flex; gap: 4px; list-style: none; }

.pagination button {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.pagination button.active { background: var(--accent-blue); color: white; border-color: var(--accent-blue); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== Utility ===== */
.text-green { color: var(--accent-green); }
.text-red { color: var(--accent-red); }
.text-muted { color: var(--text-secondary); }
.hidden { display: none !important; }