/**
 * Components CSS - Buttons, Cards, Forms, etc.
 *
 * @package Dix
 * @since 1.0.0
 */

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Primary Button */
.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

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

/* Secondary Button */
.btn--secondary {
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    border-color: var(--color-secondary);
}

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

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

.btn--outline:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* Ghost Button */
.btn--ghost {
    background-color: transparent;
    color: var(--color-text);
    border-color: transparent;
}

.btn--ghost:hover {
    background-color: var(--color-bg-tertiary);
}

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

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

.btn--full {
    width: 100%;
}

/* Icon Button */
.btn--icon {
    padding: var(--spacing-2);
    border-radius: var(--radius-full);
}

/* Loading state */
.btn--loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn--loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

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

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

.card {
    background-color: var(--color-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card--clickable:hover {
    transform: translateY(-2px);
}

.card__image {
    aspect-ratio: 4/3;
    overflow: hidden;
}

.card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover .card__image img {
    transform: scale(1.05);
}

.card__content {
    padding: var(--spacing-5);
}

.card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-2);
}

.card__text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.card__footer {
    padding: var(--spacing-4) var(--spacing-5);
    border-top: 1px solid var(--color-border);
}

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

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

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

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* Checkbox/Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--color-primary);
}

.form-check-label {
    font-size: var(--font-size-sm);
}

/* Error state */
.form-input--error,
.form-select--error {
    border-color: var(--color-error);
}

.form-error {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-1);
}

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

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

.badge--primary {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.badge--secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.badge--success {
    background-color: var(--color-success);
    color: var(--color-text-inverse);
}

.badge--warning {
    background-color: var(--color-warning);
    color: var(--color-text);
}

.badge--error {
    background-color: var(--color-error);
    color: var(--color-text-inverse);
}

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

.alert {
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
}

.alert--info {
    background-color: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--color-info);
    color: var(--color-info);
}

.alert--success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.alert--warning {
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--color-warning);
    color: #92400e;
}

.alert--error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

/* ==========================================================================
   LOADER / SPINNER
   ========================================================================== */

.loader {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loader--sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.loader--lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

/* ==========================================================================
   DIVIDERS
   ========================================================================== */

.divider {
    height: 1px;
    background-color: var(--color-border);
    margin: var(--spacing-6) 0;
}

.divider--thick {
    height: 2px;
}

/* ==========================================================================
   TAGS
   ========================================================================== */

.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-sm);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
}

.tag:hover {
    background-color: var(--color-border);
}

.tag__remove {
    display: flex;
    padding: 2px;
    margin-left: var(--spacing-1);
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.tag__remove:hover {
    opacity: 1;
}

/* ==========================================================================
   PROGRESS BAR
   ========================================================================== */

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

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

.progress--success .progress__bar {
    background-color: var(--color-success);
}

.progress--sm {
    height: 4px;
}

.progress--lg {
    height: 12px;
}

/* ==========================================================================
   AVATAR
   ========================================================================== */

.avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-tertiary);
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar--sm {
    width: 32px;
    height: 32px;
}

.avatar--lg {
    width: 56px;
    height: 56px;
}

.avatar--xl {
    width: 80px;
    height: 80px;
}

/* ==========================================================================
   TOOLTIP (CSS only)
   ========================================================================== */

[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    padding: var(--spacing-2) var(--spacing-3);
    background-color: var(--color-bg-dark);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    white-space: nowrap;
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    z-index: var(--z-tooltip);
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
}