:root {
    --primary: #475569;
    --primary-hover: #334155;
    --bg-color: #f8fafc;
    --surface: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

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

/* Flat panels */
.glass-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.text-gradient {
    color: var(--text-main); /* Removed gradient for flat theme */
}

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

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

input[type="text"],
input[type="password"],
input[type="number"],
input[type="url"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-main);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.2s ease;
    text-decoration: none;
}

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

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

/* Navbar */
.navbar {
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--text-main);
    text-decoration: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text-main);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    text-transform: uppercase;
    background-color: var(--bg-color);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .nav-links a {
        margin-left: 0;
    }
    
    table {
        display: block;
        overflow-x: auto;
    }
}