/* style.css - Centralized Styles for TECHSHEL System */
:root {
    --primary-color: #2c3e50;
    --accent-color: #007bff;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --bg-color: #f4f4f4;
    --card-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    background: var(--bg-color); 
    margin: 0; 
    padding: 0; 
    color: #333;
}

/* Page Layout */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Cards (Boxes) */
.card { 
    background: white; 
    padding: 30px; 
    border-radius: 12px; 
    box-shadow: var(--card-shadow); 
    border: 1px solid #eee;
    margin-bottom: 30px;
}

h2, h3 { color: var(--primary-color); margin-top: 0; }

.section-title { 
    border-bottom: 2px solid #eee; 
    padding-bottom: 8px; 
    margin-top: 25px; 
    margin-bottom: 20px; 
    color: var(--accent-color); 
    font-size: 1.1rem;
    text-transform: uppercase;
    font-weight: bold;
}

/* Forms */
.row { margin-bottom: 15px; }
.flex-row { display: flex; gap: 20px; flex-wrap: wrap; }
.flex-item { flex: 1; min-width: 200px; }

label { 
    display: block; 
    font-weight: 600; 
    margin-bottom: 8px; 
    font-size: 0.9rem;
}

input, select { 
    width: 100%; 
    padding: 12px; 
    box-sizing: border-box; 
    border: 1px solid #ddd; 
    border-radius: 6px; 
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* Buttons */
.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary { background: var(--accent-color); color: white; width: 100%; font-size: 1.1rem; }
.btn-primary:hover { background: #0056b3; }

.btn-danger { color: var(--danger-color); border: 1px solid var(--danger-color); background: none; }
.btn-danger:hover { background: var(--danger-color); color: white; }

/* Tables */
table { width: 100%; border-collapse: collapse; background: white; border-radius: 8px; overflow: hidden; }
th, td { padding: 15px; border-bottom: 1px solid #eee; text-align: left; }
th { background: var(--primary-color); color: white; font-size: 0.85rem; }
tr:hover { background: #f9f9f9; }

/* Alerts */
.alert { padding: 15px; border-radius: 6px; margin-bottom: 20px; font-weight: bold; border: 1px solid transparent; }
.alert-success { background: #d4edda; color: #155724; border-color: #c3e6cb; }