/**
 * Forms - Sistema de Enlaces
 * Versión: 3.0
 * Estilos reutilizables para formularios estilo AdminLTE
 * Inspirado en diseño moderno y profesional
 */

/* ============================================
   CONTENEDOR DE FORMULARIO
   ============================================ */

.form-page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.form-page-header .page-title {
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
}

.form-page-header .page-title i {
    color: var(--icon-highlight);
    font-size: 1.5rem;
}

.form-page-header .form-breadcrumb {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-page-header .form-breadcrumb a {
    color: var(--color-action-primary);
    text-decoration: none;
    transition: var(--transition);
}

.form-page-header .form-breadcrumb a:hover {
    color: var(--color-action-hover);
    text-decoration: underline;
}

/* ============================================
   CARD DE FORMULARIO
   ============================================ */

.form-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: var(--transition);
}

.form-card:hover {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
}

.form-card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-action-primary) 100%);
    color: white;
    padding: 1.5rem;
    border-bottom: none;
}

.form-card-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.form-card-header h3 i {
    color: var(--icon-highlight);
}

.form-card-header p {
    margin: 0.5rem 0 0 0;
    opacity: 0.9;
    font-size: 0.9rem;
}

.form-card-body {
    padding: 2rem;
}

/* ============================================
   SECCIONES DEL FORMULARIO
   ============================================ */

.form-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-light);
}

.form-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.form-section-title {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-action-primary);
}

.form-section-title i {
    color: var(--color-action-primary);
    font-size: 1rem;
}

/* ============================================
   GRUPOS DE FORMULARIO
   ============================================ */

.form-group {
    margin-bottom: 1.75rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

/* Labels mejorados */
.form-label-enhanced {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.form-label-enhanced i {
    color: var(--input-icon-color);
    font-size: 0.9rem;
}

.form-label-enhanced .label-required {
    color: var(--color-danger);
    font-weight: 700;
}

.form-label-enhanced .label-optional {
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ============================================
   INPUTS CON ICONOS
   ============================================ */

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

.input-with-icon .input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--input-icon-color);
    font-size: 1rem;
    z-index: 10;
    transition: var(--transition);
}

.input-with-icon .form-control {
    padding-left: 3rem;
}

.input-with-icon .form-control:focus ~ .input-icon {
    color: var(--color-action-primary);
}

/* Input con contador de caracteres */
.input-with-counter {
    position: relative;
}

.input-counter {
    position: absolute;
    right: 0.75rem;
    bottom: -1.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.input-counter.warning {
    color: var(--color-warning);
}

.input-counter.danger {
    color: var(--color-danger);
}

/* ============================================
   INPUT GROUPS MEJORADOS
   ============================================ */

.input-group-modern {
    display: flex;
    align-items: stretch;
    width: 100%;
}

.input-group-modern .input-group-text {
    background: linear-gradient(135deg, var(--input-bg) 0%, var(--bg-hover) 100%);
    border: 1px solid var(--input-border);
    border-right: none;
    color: var(--input-icon-color);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    font-weight: 600;
    transition: var(--transition);
}

.input-group-modern .form-control {
    border-left: none;
}

.input-group-modern .form-control:focus {
    border-left-color: var(--input-focus-border);
}

.input-group-modern .form-control:focus ~ .input-group-text,
.input-group-modern:focus-within .input-group-text {
    border-color: var(--input-focus-border);
    color: var(--color-action-primary);
}

/* ============================================
   FORM TEXT / AYUDA
   ============================================ */

.form-help {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--bg-hover);
    border-left: 3px solid var(--color-action-primary);
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.form-help i {
    color: var(--color-action-primary);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.form-help-warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-left-color: var(--color-warning);
}

.form-help-warning i {
    color: var(--color-warning);
}

.form-help-success {
    background-color: rgba(28, 116, 132, 0.1);
    border-left-color: var(--color-success);
}

.form-help-success i {
    color: var(--color-success);
}

/* ============================================
   SELECT MEJORADO
   ============================================ */

.select-enhanced {
    position: relative;
}

.select-enhanced::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--input-icon-color);
    transition: var(--transition);
}

.select-enhanced .form-select {
    padding-right: 3rem;
    appearance: none;
    background-image: none;
}

.select-enhanced .form-select:focus ~ ::after {
    color: var(--color-action-primary);
}

/* ============================================
   TEXTAREA MEJORADO
   ============================================ */

.textarea-enhanced {
    position: relative;
}

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

.textarea-enhanced .textarea-toolbar {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
}

.textarea-enhanced .toolbar-btn {
    padding: 0.25rem 0.5rem;
    background-color: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.textarea-enhanced .toolbar-btn:hover {
    background-color: var(--hover-bg);
    color: var(--color-action-primary);
}

/* ============================================
   BOTONES DEL FORMULARIO
   ============================================ */

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
    gap: 1rem;
}

.form-actions-left,
.form-actions-right {
    display: flex;
    gap: 0.75rem;
}

.form-btn {
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    border: 2px solid transparent;
}

.form-btn i {
    font-size: 1.1rem;
}

.form-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.form-btn:active {
    transform: translateY(0);
}

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

.form-btn-save:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: 0 4px 12px var(--shadow-primary);
    color: white;
}

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

.form-btn-back:hover {
    background-color: var(--color-secondary-hover);
    border-color: var(--color-secondary-hover);
    box-shadow: 0 4px 12px var(--shadow-secondary);
    color: white;
}

.form-btn-reset {
    background-color: transparent;
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.form-btn-reset:hover {
    background-color: var(--color-danger);
    color: white;
}

/* ============================================
   VALIDACIÓN VISUAL
   ============================================ */

.form-control.is-valid,
.form-select.is-valid {
    border-color: var(--color-success);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%231c7484' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-valid:focus,
.form-select.is-valid:focus {
    border-color: var(--color-success);
    box-shadow: 0 0 0 0.2rem var(--focus-success);
}

.valid-feedback-enhanced {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-success);
    font-weight: 500;
}

.valid-feedback-enhanced i {
    font-size: 1rem;
}

.invalid-feedback-enhanced {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-danger);
    font-weight: 500;
}

.invalid-feedback-enhanced i {
    font-size: 1rem;
}

/* ============================================
   ANIMACIONES
   ============================================ */

@keyframes formFieldShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.form-field-error {
    animation: formFieldShake 0.5s;
}

@keyframes formFieldSuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.form-field-success {
    animation: formFieldSuccess 0.4s;
}

/* ============================================
   LOADING STATE
   ============================================ */

.form-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2rem;
    height: 2rem;
    margin: -1rem 0 0 -1rem;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-action-primary);
    border-radius: 50%;
    animation: formSpinner 0.6s linear infinite;
}

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

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

@media (max-width: 768px) {
    .form-card-body {
        padding: 1.5rem;
    }
    
    .form-page-header .page-title {
        font-size: 1.5rem;
    }
    
    .form-actions {
        flex-direction: column-reverse;
    }
    
    .form-actions-left,
    .form-actions-right {
        width: 100%;
        justify-content: center;
    }
    
    .form-btn {
        width: 100%;
        justify-content: center;
    }
    
    .form-section-title {
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .form-card {
        border-radius: 8px;
    }
    
    .form-card-header {
        padding: 1.25rem;
    }
    
    .form-card-body {
        padding: 1.25rem;
    }
    
    .form-btn {
        padding: 0.65rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .input-with-icon .input-icon {
        font-size: 0.9rem;
    }
}