:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --accent: #0d9488;
    --dark: #1f2937;
    --light: #f9fafb;
    --border: #e5e7eb;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light);
    color: var(--dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: white;
    border-bottom: 3px solid var(--primary);
    padding: 15px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-placeholder {
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

nav a {
    margin-left: 20px;
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
}

nav a:hover, nav a.active {
    color: var(--primary);
}

.btn-logout {
    color: #dc2626;
    border: 1px solid #dc2626;
    padding: 5px 10px;
    border-radius: 4px;
}

.btn-logout:hover {
    background-color: #dc2626;
    color: white;
}

main {
    flex: 1;
    padding: 40px 5%;
    max-width: 1200px;
    margin: 0 auto;
    width: 90%;
}

footer {
    background-color: var(--dark);
    color: white;
    text-align: center;
    padding: 15px 0;
    margin-top: auto;
    font-size: 0.9rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

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

tr:hover {
    background-color: #f3f4f6;
}

.action-btn {
    display: inline-block;
    padding: 6px 12px;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}

.btn-primary { background-color: var(--primary); color: white; }
.btn-accent { background-color: var(--accent); color: white; }
.btn-danger { background-color: #dc2626; color: white; }

.form-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    max-width: 600px;
    margin: 0 auto;
}

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

form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

form input, form select, form textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    box-sizing: border-box;
}

.file-icon {
    font-size: 1.5rem;
    text-decoration: none;
}