/**
 * UI ENHANCEMENTS - Advanced Visual Improvements
 * ===============================================
 * Mejoras visuales avanzadas, micro-interacciones y estados mejorados
 */

/* ==================== FOCUS MANAGEMENT ==================== */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ==================== LINK ENHANCEMENTS ==================== */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-fast);
    position: relative;
}

a:hover {
    color: var(--color-primary-dark);
}

a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: width var(--transition-fast);
}

a:hover::after {
    width: 100%;
}

/* ==================== SELECTION STYLING ==================== */
::selection {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
}

::-moz-selection {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
}

/* ==================== TEXT SELECTION COLORS ==================== */
body.dark-mode ::selection {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
    color: #1a1a2e;
}

/* ==================== FORM GROUP STYLING ==================== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: var(--font-weight-semibold);
    font-size: 0.9rem;
    color: var(--color-ink);
    letter-spacing: 0.3px;
    text-transform: uppercase;
    transition: color var(--transition-fast);
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group select:focus + label {
    color: var(--color-primary);
}

/* ==================== LOADING INDICATORS ==================== */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 107, 107, 0.2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.skeleton {
    display: block;
    background: linear-gradient(
        90deg,
        var(--color-surface-alt),
        var(--color-surface),
        var(--color-surface-alt)
    );
    background-size: 200% 100%;
    animation: skeleton-loading 2s infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ==================== BADGE ENHANCEMENTS ==================== */
.badge,
.tag,
[class*="badge"],
[class*="tag"] {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(255, 152, 119, 0.1));
    color: var(--color-primary);
    border: 1px solid rgba(255, 107, 107, 0.2);
    transition: var(--transition-fast);
    backdrop-filter: blur(10px);
}

.badge:hover {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.2), rgba(255, 152, 119, 0.2));
    transform: scale(1.05);
}

/* Badge variants */
.badge-success {
    background: linear-gradient(135deg, rgba(0, 208, 132, 0.1), rgba(0, 208, 132, 0.15));
    color: var(--color-success);
    border-color: rgba(0, 208, 132, 0.2);
}

.badge-danger {
    background: linear-gradient(135deg, rgba(255, 71, 87, 0.1), rgba(255, 71, 87, 0.15));
    color: var(--color-danger);
    border-color: rgba(255, 71, 87, 0.2);
}

.badge-warning {
    background: linear-gradient(135deg, rgba(255, 165, 0, 0.1), rgba(255, 165, 0, 0.15));
    color: var(--color-warning);
    border-color: rgba(255, 165, 0, 0.2);
}

.badge-info {
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.1), rgba(0, 188, 212, 0.15));
    color: var(--color-info);
    border-color: rgba(0, 188, 212, 0.2);
}

/* ==================== PILL ELEMENTS ==================== */
.pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-full);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
}

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

/* ==================== ALERT BOXES ==================== */
.alert {
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    background: var(--color-surface-alt);
    margin-bottom: var(--space-lg);
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    animation: slideInUp 0.3s var(--easing-out);
}

.alert-success {
    background: linear-gradient(135deg, rgba(0, 208, 132, 0.05), rgba(0, 208, 132, 0.08));
    border-left-color: var(--color-success);
    color: var(--color-success);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(255, 71, 87, 0.05), rgba(255, 71, 87, 0.08));
    border-left-color: var(--color-danger);
    color: var(--color-danger);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 165, 0, 0.05), rgba(255, 165, 0, 0.08));
    border-left-color: var(--color-warning);
    color: var(--color-warning);
}

.alert-info {
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.05), rgba(0, 188, 212, 0.08));
    border-left-color: var(--color-info);
    color: var(--color-info);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== PROGRESS BARS ==================== */
.progress {
    height: 6px;
    background: var(--color-surface-alt);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--space-md) 0;
    box-shadow: var(--shadow-sm);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-full);
    transition: width 0.4s var(--easing-out);
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ==================== TOOLTIP STYLING ==================== */
.tooltip {
    position: relative;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-ink);
    color: white;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 1000;
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: calc(100% - 4px);
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--color-ink);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

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

/* ==================== DIVIDER ENHANCEMENTS ==================== */
.divider {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border) 20%, var(--color-border) 80%, transparent);
    margin: var(--space-lg) 0;
}

.divider-text {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--color-muted);
    font-size: 0.9rem;
    margin: var(--space-lg) 0;
}

.divider-text::before,
.divider-text::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* ==================== SMOOTH TRANSITIONS ==================== */
button,
a,
input,
textarea,
select {
    transition: var(--transition-base);
}

/* ==================== HOVER EFFECTS ==================== */
.hover-scale {
    transition: var(--transition-fast);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-shadow {
    transition: var(--transition-fast);
}

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

.hover-glow {
    transition: var(--transition-fast);
}

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

/* ==================== TEXT UTILITIES ==================== */
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

.font-light { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.tracking-tight { letter-spacing: -0.5px; }
.tracking-normal { letter-spacing: 0; }
.tracking-wide { letter-spacing: 0.3px; }

.leading-tight { line-height: 1.2; }
.leading-normal { line-height: 1.5; }
.leading-relaxed { line-height: 1.75; }

/* ==================== DARK MODE ENHANCEMENTS ==================== */
body.dark-mode .alert {
    background: rgba(255, 255, 255, 0.05);
}

body.dark-mode .badge,
body.dark-mode .tag,
body.dark-mode [class*="badge"],
body.dark-mode [class*="tag"] {
    background: rgba(255, 107, 107, 0.15);
    border-color: rgba(255, 107, 107, 0.3);
}

body.dark-mode .progress {
    background: rgba(255, 255, 255, 0.1);
}

body.dark-mode .tooltip::before {
    background: var(--color-dark-ink);
    color: var(--color-dark-surface);
}

body.dark-mode .tooltip::after {
    border-top-color: var(--color-dark-ink);
}

/* ==================== RESPONSIVE ADJUSTMENTS ==================== */
@media (max-width: 768px) {
    .alert {
        gap: var(--space-sm);
        padding: var(--space-md);
    }
    
    .badge,
    .tag {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.7rem;
    }
    
    .tooltip::before {
        white-space: normal;
        width: 200px;
    }
}

/* ==================== REDUCED MOTION ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}