:root {
    /* Primary Color Palette - Deep Blue & Electric Violet */
    --primary-hue: 250;
    --primary: hsl(var(--primary-hue), 70%, 60%);
    --primary-dark: hsl(var(--primary-hue), 70%, 50%);
    --primary-glow: hsl(var(--primary-hue), 70%, 60%, 0.5);
    
    --accent-hue: 180; /* Cyan */
    --accent: hsl(var(--accent-hue), 90%, 55%);
    --accent-glow: hsl(var(--accent-hue), 90%, 55%, 0.4);

    /* Backgrounds - Dark Theme */
    --bg-body: #0f172a; /* Slate 900 */
    --bg-surface: #1e293b; /* Slate 800 */
    --bg-glass: rgba(30, 41, 59, 0.7);
    --border-glass: rgba(255, 255, 255, 0.1);

    /* Text */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;

    /* Spacing & Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px var(--primary-glow);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    background: radial-gradient(circle at top left, #1e1b4b, transparent 40%),
                radial-gradient(circle at bottom right, #312e81, transparent 40%),
                var(--bg-body);
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    outline: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

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

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.2;
    color: var(--text-main);
}

h1 { font-size: 2.5rem; font-weight: 800; }
h2 { font-size: 2rem; font-weight: 700; }

.title-gradient {
    background: linear-gradient(to right, var(--text-main), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Login Page Specifics */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    position: relative;
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    animation: fadeInUp 0.6s ease-out;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 10px;
    display: block;
    color: var(--primary);
    text-shadow: 0 0 10px var(--primary-glow);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-main);
    transition: all 0.2s;
}

.form-input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.role-switcher {
    display: flex;
    background: rgba(15, 23, 42, 0.5);
    padding: 4px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
}

.role-btn {
    flex: 1;
    padding: 8px;
    text-align: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.2s;
}

.role-btn.active {
    background: var(--bg-surface);
    color: var(--text-main);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Main App Layout */
.app-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    height: 100vh;
}

.sidebar {
    background: rgba(30, 41, 59, 0.4);
    border-right: 1px solid var(--border-glass);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.main-content {
    padding: 30px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--radius-md);
    margin-bottom: 4px;
    transition: 0.2s;
}

.nav-item:hover, .nav-item.active {
    background: var(--primary-glow);
    color: var(--text-main);
}