:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --background-color: #f8f9fa;
    --text-color: #333;
    --light-gray: #e9ecef;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

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

/* Header */
header {
    background-color: white;
    box-shadow: var(--box-shadow);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
}

.logo {
    max-width: 250px;
    height: auto;
    margin-bottom: 1rem;
}

h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin: 0;
    font-weight: 700;
}

h2 {
    color: var(--secondary-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
    margin-top: 2rem;
    margin-bottom: 1.5rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
}

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

th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

tr:hover {
    background-color: #f1f1f1;
}

/* Forms */
.form-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    max-width: 600px;
    margin: 0 auto 2rem auto;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

label {
    font-weight: 600;
    color: var(--secondary-color);
    display: block;
    margin-bottom: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
select,
input[type="file"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.15s ease-in-out;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus {
    border-color: var(--accent-color);
    outline: 0;
}

input[type="submit"] {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    align-self: flex-start;
}

input[type="submit"]:hover {
    background-color: #2980b9;
}

/* Stats */
.stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
    justify-content: center;
}

.stat-item {
    background: white;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.stat-label {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: #6c757d;
    font-size: 0.9rem;
    margin-top: 3rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
}