/* assets/css/style.css — Premium Dark Theme */
:root {
  --bg-dark: #0a0d12;
  --bg-card: rgba(22, 27, 34, 0.85);
  --bg-card-solid: #161b22;
  --text-main: #e6edf3;
  --text-muted: #8b949e;
  --primary: #58a6ff;
  --primary-hover: #79b8ff;
  --primary-glow: rgba(88, 166, 255, 0.15);
  --success: #3fb950;
  --danger: #f85149;
  --warning: #d29922;
  --border: rgba(240, 246, 252, 0.1);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --radius: 0.75rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(88, 166, 255, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(63, 185, 80, 0.02) 0%, transparent 50%);
  color: var(--text-main);
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

/* ─── Sidebar ─────────────────────────────────── */
.sidebar {
  width: 260px;
  background: linear-gradient(180deg, #0d1117 0%, #161b22 100%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  transition: var(--transition);
  z-index: 100;
  backdrop-filter: blur(20px);
}

.sidebar-header {
  padding: 1.5rem;
  font-weight: 700;
  font-size: 1.2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(88, 166, 255, 0.03);
  letter-spacing: -0.01em;
}

.sidebar-nav {
  padding: 0.75rem 0;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 0.7rem 1.5rem;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.9rem;
  gap: 0.75rem;
  border-left: 3px solid transparent;
  transition: var(--transition);
}

.nav-item:hover {
  color: var(--text-main);
  background-color: rgba(88, 166, 255, 0.06);
  border-left-color: rgba(88, 166, 255, 0.3);
}

.nav-item.active {
  color: var(--primary);
  background-color: var(--primary-glow);
  border-left-color: var(--primary);
}

.nav-item i {
  width: 18px;
  text-align: center;
  font-size: 0.85rem;
}

.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 2rem;
  width: calc(100% - 260px);
  min-height: 100vh;
}

/* ─── Cards ───────────────────────────────────── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(240, 246, 252, 0.15);
}

.card-header {
  margin-bottom: 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ─── Form Inputs ─────────────────────────────── */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.9rem;
  background-color: rgba(13, 17, 23, 0.6);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 0.9rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background-color: rgba(13, 17, 23, 0.8);
}

.form-control::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

select.form-control {
  cursor: pointer;
}

textarea.form-control {
  resize: vertical;
}

/* ─── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-family);
  text-align: center;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #388bfd 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(88, 166, 255, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, #58a6ff 100%);
  color: #fff;
  box-shadow: 0 4px 12px rgba(88, 166, 255, 0.35);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #da3633 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(248, 81, 73, 0.2);
}

.btn-danger:hover {
  background: linear-gradient(135deg, #f85149 0%, #f85149 100%);
  color: #fff;
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #2ea043 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(63, 185, 80, 0.2);
}

.btn-success:hover {
  background: linear-gradient(135deg, #56d364 0%, #3fb950 100%);
  color: #fff;
}

/* ─── Alerts ──────────────────────────────────── */
.alert {
  padding: 0.9rem 1.25rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  transition: opacity 0.3s ease;
  font-size: 0.9rem;
}

.alert-success {
  background-color: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.3);
  color: var(--success);
}

.alert-error {
  background-color: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.3);
  color: var(--danger);
}

/* ─── Tables ──────────────────────────────────── */
table th {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

table td {
  font-size: 0.9rem;
}

table tr {
  transition: var(--transition);
}

table tbody tr:hover {
  background: rgba(88, 166, 255, 0.03);
}

/* ─── Mobile Toggle ───────────────────────────── */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 200;
  background: var(--bg-card-solid);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 0.6rem 0.8rem;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 1.2rem;
}

/* ─── Responsive ──────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    width: 100%;
    padding: 1.25rem;
  }

  .mobile-toggle {
    display: inline-block !important;
  }

  .card {
    padding: 1.25rem;
  }
}

/* ─── Scrollbar ───────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(139, 148, 158, 0.3);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(139, 148, 158, 0.5);
}