/**
 * Reusable Component Styles
 * Buttons, forms, alerts, cards, modals, tables, etc.
 */

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-medium);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Button Variants */
.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.btn-secondary {
    background-color: var(--color-gray-200);
    color: var(--color-text);
    border-color: var(--color-gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-gray-300);
}

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

.btn-outline:hover:not(:disabled) {
    background-color: var(--color-primary-lighter);
}

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

.btn-success:hover:not(:disabled) {
    background-color: var(--color-success-dark);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    display: block;
    width: 100%;
}

/* ========================================
   FORMS
   ======================================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-control::placeholder {
    color: var(--color-text-lighter);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

select.form-control {
    cursor: pointer;
}

/* Radio & Checkbox */
.radio-group,
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.radio-option,
.checkbox-option {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-normal);
}

.radio-option:hover,
.checkbox-option:hover {
    background-color: var(--color-bg-lighter);
}

.radio-option input[type="radio"],
.checkbox-option input[type="checkbox"] {
    margin-right: var(--spacing-sm);
}

/* ========================================
   ALERTS & MESSAGES
   ======================================== */

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
}

.alert-success {
    color: var(--color-success-dark);
    background-color: var(--color-success-bg);
    border-color: var(--color-success);
}

.alert-error {
    color: var(--color-error);
    background-color: var(--color-error-bg);
    border-color: var(--color-error);
}

.alert-info {
    color: var(--color-info-dark);
    background-color: #e7f3ff;
    border-color: var(--color-info);
}

/* Alert with icon */
.alert-with-icon {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.alert-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

/* ========================================
   CARDS
   ======================================== */

.card {
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md);
    background-color: var(--color-bg-light);
    border-bottom: 1px solid var(--color-border-light);
}

.card-body {
    padding: var(--spacing-md);
}

.card-footer {
    padding: var(--spacing-md);
    background-color: var(--color-bg-light);
    border-top: 1px solid var(--color-border-light);
}

/* ========================================
   MODALS
   ======================================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.hidden {
    display: none;
}

.modal {
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.modal-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: var(--font-size-xl);
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    opacity: 0.8;
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-md);
    background-color: var(--color-bg-light);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* ========================================
   TABLES
   ======================================== */

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead {
    background-color: var(--color-gray-50);
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

.table th {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

.table tbody tr:hover {
    background-color: var(--color-bg-light);
}

.table-bordered {
    border: 1px solid var(--color-border-light);
}

.table-bordered th,
.table-bordered td {
    border: 1px solid var(--color-border-light);
}

.table-striped tbody tr:nth-child(even) {
    background-color: var(--color-bg-light);
}

/* ========================================
   GRID LAYOUTS
   ======================================== */

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 {
    grid-template-columns: 1fr;
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ========================================
   DIVIDER
   ======================================== */

.divider {
    margin: var(--spacing-xl) 0;
    border: none;
    border-top: 1px solid var(--color-border);
}

/* ========================================
   LOADING SPINNER
   ======================================== */

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    .modal {
        width: 95%;
        max-height: 95vh;
    }
}