/**
 * Estilos CSS para el frontend del Humanizador
 *
 * @package HumanizadorTextosIA
 * @since 1.0.0
 */

/* ==========================================================================
   Variables CSS
   ========================================================================== */
:root {
    --htia-panel-left-bg: #f8f4f4;
    --htia-panel-left-border: #e8e0e0;
    --htia-panel-right-bg: #f0f9f4;
    --htia-panel-right-border: #d4ead8;
    --htia-btn-primary: #6B9FEE;
    --htia-btn-primary-hover: #5a8de0;
    --htia-btn-primary-active: #4a7dd0;
    --htia-text-dark: #333333;
    --htia-text-medium: #666666;
    --htia-text-light: #999999;
    --htia-border: #e0e0e0;
    --htia-white: #ffffff;
    --htia-success: #4caf50;
    --htia-error: #e74c3c;
    --htia-warning: #f39c12;
    --htia-radius: 12px;
    --htia-radius-sm: 8px;
    --htia-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --htia-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --htia-transition: 0.3s ease;
}

/* ==========================================================================
   Container Principal
   ========================================================================== */
.htia-container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    line-height: 1.6;
}

/* ==========================================================================
   Paneles Layout
   ========================================================================== */
.htia-panels {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    align-items: start;
}

.htia-panel {
    background: var(--htia-white);
    border-radius: var(--htia-radius);
    box-shadow: var(--htia-shadow);
    overflow: hidden;
    transition: box-shadow var(--htia-transition);
}

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

/* Panel Izquierdo - Texto Original */
.htia-panel-original {
    background: var(--htia-panel-left-bg);
    border: 1px solid var(--htia-panel-left-border);
}

.htia-panel-original .htia-panel-header {
    background: linear-gradient(135deg, #f5eaea 0%, #f0e5e5 100%);
    border-bottom: 1px solid var(--htia-panel-left-border);
}

/* Panel Derecho - Texto Humanizado */
.htia-panel-humanizado {
    background: var(--htia-panel-right-bg);
    border: 1px solid var(--htia-panel-right-border);
}

.htia-panel-humanizado .htia-panel-header {
    background: linear-gradient(135deg, #e8f5e9 0%, #e0f2e1 100%);
    border-bottom: 1px solid var(--htia-panel-right-border);
}

/* ==========================================================================
   Panel Header
   ========================================================================== */
.htia-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.htia-panel-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--htia-text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ==========================================================================
   Panel Body
   ========================================================================== */
.htia-panel-body {
    padding: 20px;
}

/* Textarea del texto original */
.htia-textarea {
    width: 100%;
    min-height: 300px;
    padding: 15px;
    font-size: 15px;
    font-family: inherit;
    line-height: 1.7;
    color: var(--htia-text-dark);
    background: var(--htia-white);
    border: 1px solid var(--htia-border);
    border-radius: var(--htia-radius-sm);
    resize: vertical;
    transition: border-color var(--htia-transition), box-shadow var(--htia-transition);
    box-sizing: border-box;
}

.htia-textarea:focus {
    outline: none;
    border-color: var(--htia-btn-primary);
    box-shadow: 0 0 0 3px rgba(107, 159, 238, 0.2);
}

.htia-textarea::placeholder {
    color: var(--htia-text-light);
}

/* Área de resultado */
.htia-resultado {
    min-height: 300px;
    padding: 15px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--htia-text-dark);
    background: var(--htia-white);
    border: 1px solid var(--htia-border);
    border-radius: var(--htia-radius-sm);
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-y: auto;
}

.htia-resultado .htia-placeholder {
    color: var(--htia-text-light);
    font-style: italic;
    margin: 0;
}

/* ==========================================================================
   Contador de Caracteres
   ========================================================================== */
.htia-contador {
    display: flex;
    justify-content: flex-end;
    padding: 8px 0 0 0;
    font-size: 13px;
    color: var(--htia-text-light);
}

#htia-contador-caracteres {
    font-weight: 600;
    margin-right: 4px;
    transition: color var(--htia-transition);
}

.htia-contador-vacio {
    color: var(--htia-error) !important;
}

.htia-contador-activo {
    color: var(--htia-success) !important;
}

/* ==========================================================================
   Botón Central
   ========================================================================== */
.htia-boton-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
}

.htia-btn-humanizar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    color: var(--htia-white);
    background: var(--htia-btn-primary);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--htia-transition);
    box-shadow: 0 4px 15px rgba(107, 159, 238, 0.4);
    min-width: 180px;
}

.htia-btn-humanizar:hover {
    background: var(--htia-btn-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(107, 159, 238, 0.5);
}

.htia-btn-humanizar:active {
    background: var(--htia-btn-primary-active);
    transform: translateY(0);
}

.htia-btn-humanizar:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

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

.htia-spinner {
    width: 20px;
    height: 20px;
    animation: htia-spin 1s linear infinite;
}

@keyframes htia-spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ==========================================================================
   Botón Copiar
   ========================================================================== */
.htia-btn-copiar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: var(--htia-white);
    border: 1px solid var(--htia-panel-right-border);
    border-radius: var(--htia-radius-sm);
    cursor: pointer;
    transition: all var(--htia-transition);
}

.htia-btn-copiar svg {
    width: 18px;
    height: 18px;
    color: var(--htia-text-medium);
    transition: color var(--htia-transition);
}

.htia-btn-copiar:hover {
    background: var(--htia-success);
    border-color: var(--htia-success);
}

.htia-btn-copiar:hover svg {
    color: var(--htia-white);
}

.htia-btn-copiar.htia-copiado {
    background: var(--htia-success);
    border-color: var(--htia-success);
}

.htia-btn-copiar.htia-copiado svg {
    color: var(--htia-white);
}

/* ==========================================================================
   Notificaciones
   ========================================================================== */
.htia-notificacion {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px 30px;
    border-radius: var(--htia-radius);
    font-size: 14px;
    font-weight: 500;
    z-index: 99999;
    animation: htia-notificacion-in 0.3s ease;
    max-width: 90%;
    text-align: center;
}

.htia-notificacion-success {
    background: var(--htia-success);
    color: var(--htia-white);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
}

.htia-notificacion-error {
    background: var(--htia-error);
    color: var(--htia-white);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.4);
}

.htia-notificacion-warning {
    background: var(--htia-warning);
    color: var(--htia-white);
    box-shadow: 0 4px 15px rgba(243, 156, 18, 0.4);
}

@keyframes htia-notificacion-in {
    from {
        transform: translateX(-50%) translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

/* ==========================================================================
   Estados de Loading
   ========================================================================== */
.htia-loading .htia-resultado {
    position: relative;
}

.htia-loading .htia-resultado::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Tablet */
@media screen and (max-width: 992px) {
    .htia-panels {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .htia-boton-container {
        padding: 10px 0;
        order: 2;
    }

    .htia-panel-original {
        order: 1;
    }

    .htia-panel-humanizado {
        order: 3;
    }

    .htia-btn-humanizar {
        width: 100%;
        max-width: 300px;
    }
}

/* Mobile */
@media screen and (max-width: 600px) {
    .htia-container {
        padding: 0 15px;
        margin: 20px auto;
    }

    .htia-panel-header {
        padding: 12px 15px;
    }

    .htia-panel-header h3 {
        font-size: 14px;
    }

    .htia-panel-body {
        padding: 15px;
    }

    .htia-textarea,
    .htia-resultado {
        min-height: 200px;
        padding: 12px;
        font-size: 14px;
    }

    .htia-btn-humanizar {
        padding: 14px 24px;
        font-size: 15px;
    }

    .htia-notificacion {
        bottom: 20px;
        padding: 12px 20px;
        font-size: 13px;
    }
}

/* ==========================================================================
   Animaciones Adicionales
   ========================================================================== */
.htia-fade-in {
    animation: htia-fade-in 0.5s ease;
}

@keyframes htia-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.htia-pulse {
    animation: htia-pulse 2s infinite;
}

@keyframes htia-pulse {
    0% {
        box-shadow: 0 4px 15px rgba(107, 159, 238, 0.4);
    }
    50% {
        box-shadow: 0 4px 25px rgba(107, 159, 238, 0.6);
    }
    100% {
        box-shadow: 0 4px 15px rgba(107, 159, 238, 0.4);
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    .htia-boton-container,
    .htia-btn-copiar,
    .htia-notificacion {
        display: none !important;
    }

    .htia-panels {
        display: block;
    }

    .htia-panel {
        box-shadow: none;
        border: 1px solid #ccc;
        margin-bottom: 20px;
        page-break-inside: avoid;
    }
}