/* Sortable Table Headers */
.sortable {
    cursor: pointer;
    position: relative;
}

.arrow {
    font-size: 12px;
    opacity: 0.5;
}

.sortable.asc .arrow::after {
    content: " ↑";
    opacity: 1;
}

.sortable.desc .arrow::after {
    content: " ↓";
    opacity: 1;
}

.sortable:hover .arrow {
    opacity: 1;
}

/* Theme Variables */
:root {
    --primary-color: #3b82f6; /* Tailwind Blue 500 */
    --secondary-color: #64748b; /* Tailwind Slate 500 */
    --text-color: #1f2937; /* Tailwind Gray 800 */
    --bg-color: #f9fafb; /* Tailwind Gray 50 */
    --card-bg: #ffffff;
}

html.dark-mode {
    --primary-color: #3b82f6;
    --secondary-color: #94a3b8;
    --text-color: #f3f4f6;
    --bg-color: #111827;
    --card-bg: #1f2937;
}

/* Global Styles */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Card Styles */
.card {
    background-color: var(--card-bg);
    border: none;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border-radius: 0.75rem; /* 12px */
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    padding: 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Form Controls */
.form-control, .form-select {
    border-radius: 0.5rem;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid #d1d5db;
    padding: 0.625rem 0.75rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
    outline: none;
}

/* Buttons */
.btn {
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: #2563eb; /* Blue 600 */
    border-color: #2563eb;
    transform: translateY(-1px);
}

/* Dark Mode Toggle */
.toggle-mode {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--card-bg);
    padding: 10px;
    border-radius: 50%;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    cursor: pointer;
}