/* ============================================
   CAMPUS LANE HOLDINGS - MODERN COMPONENTS
   Buttons, Cards, Forms, and UI Elements
   ============================================ */

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--clh-space-2);
    padding: var(--clh-space-3) var(--clh-space-6);
    font-size: var(--clh-font-size-base);
    font-weight: var(--clh-font-weight-medium);
    line-height: 1.5;
    text-decoration: none;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--clh-radius-lg);
    cursor: pointer;
    transition: all var(--clh-transition-base);
    white-space: nowrap;
    user-select: none;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--clh-primary-dark);
    border-color: var(--clh-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--clh-shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--clh-secondary-dark);
    border-color: var(--clh-secondary-dark);
    transform: translateY(-2px);
    box-shadow: var(--clh-shadow-md);
}

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

.btn-accent:hover:not(:disabled) {
    background: var(--clh-accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--clh-shadow-md);
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--clh-text-primary);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--clh-bg-secondary);
}

.btn-link {
    background: transparent;
    color: var(--clh-primary);
    border: none;
    padding: var(--clh-space-2) var(--clh-space-3);
}

.btn-link:hover:not(:disabled) {
    text-decoration: underline;
}

/* Button Sizes */
.btn-small {
    padding: var(--clh-space-2) var(--clh-space-4);
    font-size: var(--clh-font-size-sm);
}

.btn-large {
    padding: var(--clh-space-4) var(--clh-space-8);
    font-size: var(--clh-font-size-lg);
}

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

.btn-icon {
    padding: var(--clh-space-3);
    aspect-ratio: 1;
}

/* Button with icon */
.btn i {
    font-size: 1.1em;
}

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

.card {
    background: var(--clh-bg-elevated);
    border-radius: var(--clh-radius-xl);
    box-shadow: var(--clh-shadow-md);
    overflow: hidden;
    transition: all var(--clh-transition-base);
    border: 1px solid var(--clh-border-light);
}

.card:hover {
    box-shadow: var(--clh-shadow-xl);
    transform: translateY(-4px);
}

.card-header {
    padding: var(--clh-space-6);
    border-bottom: 1px solid var(--clh-border-primary);
}

.card-body {
    padding: var(--clh-space-6);
}

.card-footer {
    padding: var(--clh-space-6);
    border-top: 1px solid var(--clh-border-primary);
    background: var(--clh-bg-secondary);
}

.card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.card-image-wrapper {
    position: relative;
    overflow: hidden;
}

.card-image-wrapper img {
    transition: transform var(--clh-transition-slow);
}

.card:hover .card-image-wrapper img {
    transform: scale(1.1);
}

.card-title {
    font-size: var(--clh-font-size-xl);
    font-weight: var(--clh-font-weight-semibold);
    margin-bottom: var(--clh-space-3);
    color: var(--clh-text-primary);
}

.card-text {
    color: var(--clh-text-secondary);
    line-height: var(--clh-line-height-relaxed);
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: var(--clh-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--clh-transition-base);
}

.card:hover .card-overlay {
    opacity: 1;
}

/* Card Variants */
.card-bordered {
    border: 2px solid var(--clh-border-primary);
    box-shadow: none;
}

.card-flat {
    box-shadow: none;
    border: 1px solid var(--clh-border-primary);
}

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

.form-group {
    margin-bottom: var(--clh-space-5);
}

.form-label {
    display: block;
    font-weight: var(--clh-font-weight-medium);
    margin-bottom: var(--clh-space-2);
    color: var(--clh-text-primary);
    font-size: var(--clh-font-size-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--clh-space-3) var(--clh-space-4);
    font-size: var(--clh-font-size-base);
    line-height: 1.5;
    color: var(--clh-text-primary);
    background: var(--clh-bg-primary);
    border: 2px solid var(--clh-border-primary);
    border-radius: var(--clh-radius-md);
    transition: all var(--clh-transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--clh-primary);
    box-shadow: 0 0 0 3px rgba(var(--clh-primary-rgb), 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background: var(--clh-bg-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-input-icon {
    position: relative;
}

.form-input-icon i {
    position: absolute;
    left: var(--clh-space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--clh-text-tertiary);
}

.form-input-icon .form-input {
    padding-left: calc(var(--clh-space-4) * 2.5);
}

.form-helper {
    font-size: var(--clh-font-size-sm);
    color: var(--clh-text-tertiary);
    margin-top: var(--clh-space-2);
}

.form-error {
    font-size: var(--clh-font-size-sm);
    color: var(--clh-error);
    margin-top: var(--clh-space-2);
}

.form-input.error {
    border-color: var(--clh-error);
}

.form-input.success {
    border-color: var(--clh-success);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
    display: flex;
    align-items: center;
    gap: var(--clh-space-3);
    cursor: pointer;
}

.form-checkbox input,
.form-radio input {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* ===== BADGES ===== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--clh-space-1) var(--clh-space-3);
    font-size: var(--clh-font-size-xs);
    font-weight: var(--clh-font-weight-semibold);
    line-height: 1;
    border-radius: var(--clh-radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--clh-primary);
    color: white;
}

.badge-secondary {
    background: var(--clh-secondary);
    color: white;
}

.badge-success {
    background: var(--clh-success-bg);
    color: var(--clh-success-dark);
}

.badge-warning {
    background: var(--clh-warning-bg);
    color: var(--clh-warning-dark);
}

.badge-error {
    background: var(--clh-error-bg);
    color: var(--clh-error-dark);
}

.badge-info {
    background: var(--clh-info-bg);
    color: var(--clh-info-dark);
}

/* ===== ALERTS ===== */

.alert {
    padding: var(--clh-space-4) var(--clh-space-5);
    border-radius: var(--clh-radius-lg);
    border-left: 4px solid;
    margin-bottom: var(--clh-space-4);
}

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

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

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

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

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

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: var(--clh-overlay);
    z-index: var(--clh-z-modal-backdrop);
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-backdrop.active {
    display: flex;
}

.modal {
    background: var(--clh-bg-primary);
    border-radius: var(--clh-radius-xl);
    box-shadow: var(--clh-shadow-2xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    opacity: 0;
    transition: all var(--clh-transition-base);
}

.modal-backdrop.active .modal {
    transform: scale(1);
    opacity: 1;
}

.modal-header {
    padding: var(--clh-space-6);
    border-bottom: 1px solid var(--clh-border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--clh-font-size-xl);
    font-weight: var(--clh-font-weight-semibold);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--clh-font-size-2xl);
    color: var(--clh-text-tertiary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--clh-radius-md);
    transition: all var(--clh-transition-fast);
}

.modal-close:hover {
    background: var(--clh-bg-secondary);
    color: var(--clh-text-primary);
}

.modal-body {
    padding: var(--clh-space-6);
}

.modal-footer {
    padding: var(--clh-space-6);
    border-top: 1px solid var(--clh-border-primary);
    display: flex;
    gap: var(--clh-space-3);
    justify-content: flex-end;
}

/* ===== TOOLTIPS ===== */

.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--clh-text-primary);
    color: white;
    padding: var(--clh-space-2) var(--clh-space-3);
    border-radius: var(--clh-radius-md);
    font-size: var(--clh-font-size-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--clh-transition-base);
    z-index: var(--clh-z-tooltip);
}

.tooltip:hover::after {
    opacity: 1;
}

/* ===== DROPDOWN ===== */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--clh-bg-elevated);
    border-radius: var(--clh-radius-lg);
    box-shadow: var(--clh-shadow-xl);
    border: 1px solid var(--clh-border-primary);
    padding: var(--clh-space-2);
    margin-top: var(--clh-space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--clh-transition-base);
    z-index: var(--clh-z-dropdown);
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--clh-space-3) var(--clh-space-4);
    color: var(--clh-text-primary);
    text-decoration: none;
    border-radius: var(--clh-radius-md);
    transition: background var(--clh-transition-fast);
}

.dropdown-item:hover {
    background: var(--clh-bg-secondary);
}

.dropdown-divider {
    height: 1px;
    background: var(--clh-border-primary);
    margin: var(--clh-space-2) 0;
}

/* ===== PROGRESS BARS ===== */

.progress {
    width: 100%;
    height: 8px;
    background: var(--clh-bg-secondary);
    border-radius: var(--clh-radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--clh-primary);
    border-radius: var(--clh-radius-full);
    transition: width var(--clh-transition-slow);
}

.progress-bar-success {
    background: var(--clh-success);
}

.progress-bar-warning {
    background: var(--clh-warning);
}

.progress-bar-error {
    background: var(--clh-error);
}

/* ===== TABS ===== */

.tabs {
    display: flex;
    border-bottom: 2px solid var(--clh-border-primary);
    gap: var(--clh-space-2);
}

.tab {
    padding: var(--clh-space-3) var(--clh-space-5);
    background: none;
    border: none;
    color: var(--clh-text-secondary);
    font-weight: var(--clh-font-weight-medium);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--clh-transition-base);
}

.tab:hover {
    color: var(--clh-text-primary);
}

.tab.active {
    color: var(--clh-primary);
    border-bottom-color: var(--clh-primary);
}

.tab-content {
    padding: var(--clh-space-6) 0;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* ===== PAGINATION ===== */

.pagination {
    display: flex;
    gap: var(--clh-space-2);
    align-items: center;
}

.pagination-item {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--clh-border-primary);
    border-radius: var(--clh-radius-md);
    color: var(--clh-text-primary);
    text-decoration: none;
    transition: all var(--clh-transition-base);
}

.pagination-item:hover {
    border-color: var(--clh-primary);
    color: var(--clh-primary);
}

.pagination-item.active {
    background: var(--clh-primary);
    border-color: var(--clh-primary);
    color: white;
}

/* ===== BREADCRUMB ===== */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--clh-space-2);
    flex-wrap: wrap;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--clh-space-2);
    color: var(--clh-text-secondary);
    text-decoration: none;
}

.breadcrumb-item:hover {
    color: var(--clh-primary);
}

.breadcrumb-item.active {
    color: var(--clh-text-primary);
}

.breadcrumb-separator {
    color: var(--clh-text-tertiary);
}