:root {
    --bg-dark: #000000;
    --bg-card: #0a0a0a;
    --border-color: #222222;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --text-main: #e2e8f0;
    --text-muted: #8b9bb4;
    --danger: #ef4444;
    --success: #10b981;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.025em;
}

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

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

/* Layout */
.app-container {
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* Header & Navbar */
.top-navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 2rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.top-navbar .brand {
    display: flex;
    align-items: center;
}

.top-navbar .nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.top-navbar .nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-item {
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.nav-item:hover {
    color: #fff;
    background: #111;
}

.nav-item.active {
    color: #fff;
    background: #1a1a1a;
    border-bottom: 2px solid var(--primary);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.nav-item.logout {
    color: var(--danger);
}
.nav-item.logout:hover {
    background: rgba(239, 68, 68, 0.1);
}

.main-content {
    flex: 1;
    padding: 2rem 3rem;
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
}

.page-header {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Cards */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: border-color 0.2s ease;
}

.glass-card:hover {
    border-color: #333;
}

/* Grid Layouts */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 0.5rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Login Page specific */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-box {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-box h1 {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.25rem;
    text-align: left;
}

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

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: #fff;
    font-family: inherit;
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}