:root {
    --tech-primary: #2c3e50; /* Dark Blue Grey */
    --tech-accent: #3498db;  /* Bright Tech Blue */
    --tech-success: #27ae60;
    --tech-warning: #f39c12;
    --tech-danger: #e74c3c;
    --tech-bg: #ecf0f1; /* Light Grey */
    --tech-surface: #ffffff;
    --tech-text: #2c3e50;
    --tech-text-light: #7f8c8d;
    --tech-border-radius: 8px;
    --tech-shadow: 0 4px 6px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.1);
}

body {
    background-color: var(--tech-bg);
    color: var(--tech-text);
}

/* Card Styling */
.card {
    border: none;
    border-radius: var(--tech-border-radius);
    background-color: var(--tech-surface);
    box-shadow: var(--tech-shadow);
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 10px 15px rgba(0,0,0,0.08); 
}

.card-header {
    background: white;
    border-bottom: 1px solid #edf2f7;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--tech-primary);
    display: flex;
    align-items: center;
    position: relative;
}

.card-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10%;
    bottom: 10%;
    width: 4px;
    background: var(--tech-accent);
    border-radius: 0 4px 4px 0;
}

.card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    border-radius: 6px;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn-primary {
    background-color: var(--tech-accent);
    border-color: var(--tech-accent);
}

.btn-primary:hover {
    background-color: #2980b9;
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.4);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--tech-danger);
    border-color: var(--tech-danger);
}

.btn-secondary {
    background-color: #95a5a6;
    border-color: #95a5a6;
    color: white;
}

/* Table */
.table {
    margin-bottom: 0;
}

.table thead th {
    background-color: #f8fafc;
    border-top: none;
    border-bottom: 2px solid #e2e8f0;
    color: #64748b;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    padding: 1rem 0.75rem;
}

.table tbody td {
    vertical-align: middle;
    padding: 1rem 0.75rem;
    border-bottom: 1px solid #f1f5f9;
    color: var(--tech-text);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table tbody tr:hover {
    background-color: #f8fafc;
}

/* Inputs */
.form-control {
    border-radius: 6px;
    border: 1px solid #cbd5e1;
    padding: 0.5rem 0.75rem;
}

.form-control:focus {
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
    border-color: var(--tech-accent);
}