:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #14141f;
    --bg-card: #1c1c28;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #10b981;
    --border-color: #2d2d3d;
    
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Layouts */
.auth-layout {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 40%),
                radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.05), transparent 40%);
}

.auth-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
    text-align: center;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--bg-secondary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Utilities */
.text-center { text-align: center; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }
.text-sm { font-size: 0.875rem; }
.text-muted { color: var(--text-secondary); }
.d-flex { display: flex; }
.flex-column { flex-direction: column !important; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

/* Alert / Toast */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}
.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}
.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

/* App Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 260px;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}
.topbar {
    height: 64px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    justify-content: space-between;
}
.content-area {
    padding: 2rem;
    flex: 1;
    overflow-y: auto;
}

/* Sidebar Nav */
.nav-section {
    margin-bottom: 1.5rem;
}
.nav-section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}
.nav-item {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    color: var(--text-secondary);
    border-radius: 6px;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
}
.nav-item:hover, .nav-item.active {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* Switches */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  transition: .4s;
  border-radius: 24px;
}
.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background-color: var(--text-secondary);
  transition: .4s;
  border-radius: 50%;
}
input:checked + .slider {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}
input:checked + .slider:before {
  transform: translateX(20px);
  background-color: white;
}