/* ============================================================
   ESTILOS ESPECÍFICOS: REMOVER FONDO A FIRMA
   formatounico.com
   ============================================================ */

:root {
    --tool-bg: #ffffff;
    --tool-border: #e6eef2;
    --tool-heading: #06233a;
    --tool-muted: #5d7285;
    --tool-accent: #0b91a6;
    --tool-accent-hover: #087a8c;
    --tool-accent-light: #e6f6f8;
    --tool-success: #10b981;
    --tool-danger: #e25c5c;
    --checkerboard-color1: #ffffff;
    --checkerboard-color2: #e2e8f0;
}

.page-content {
    padding-top: 36px;
    padding-bottom: 60px;
}

.tool-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 36px;
}

.tool-header h1 {
    font-size: 32px;
    font-weight: 800;
    color: var(--tool-heading);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.tool-header p {
    font-size: 17px;
    color: var(--tool-muted);
    line-height: 1.55;
    margin: 0 auto;
}

/* Contenedor principal de trabajo */
.tool-workspace {
    background: var(--tool-bg);
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(6, 35, 58, 0.08);
    padding: 32px;
    max-width: 1000px;
    margin: 0 auto;
    border: 1px solid var(--tool-border);
    position: relative;
    min-height: 320px;
}

/* Área de Carga Drag & Drop */
.drop-zone {
    border: 2px dashed #b8cdd6;
    border-radius: 14px;
    padding: 55px 24px;
    text-align: center;
    transition: all 0.25s ease;
    background-color: #fcfdfe;
    cursor: pointer;
}

.drop-zone:hover {
    border-color: var(--tool-accent);
    background-color: #f4fbfc;
    transform: translateY(-1px);
}

.drop-zone.drag-over {
    border-color: var(--tool-accent);
    background-color: #eef9fa;
    transform: scale(1.01);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
}

.drop-zone-content .btn {
    pointer-events: auto;
    margin-top: 20px;
}

.upload-icon {
    color: var(--tool-accent);
    margin-bottom: 16px;
}

.drop-zone h3 {
    font-size: 21px;
    font-weight: 700;
    color: var(--tool-heading);
    margin: 0 0 8px;
}

.drop-zone p {
    color: var(--tool-muted);
    font-size: 15px;
    margin: 0 0 16px;
}

.format-badges {
    display: flex;
    gap: 8px;
    margin-top: 14px;
    flex-wrap: wrap;
    justify-content: center;
}

.format-badge {
    background: #edf2f7;
    color: #4a5568;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.hidden-input {
    display: none;
}

.hidden {
    display: none !important;
}

/* ============================================================
   PANEL DEL EDITOR DE FIRMA
   ============================================================ */
.editor-container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 30px;
    align-items: start;
}

@media (max-width: 860px) {
    .editor-container {
        grid-template-columns: 1fr;
    }
}

/* Columna Izquierda: Visor del Canvas */
.preview-column {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.preview-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--tool-heading);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Selector de fondo para contraste de preview */
.bg-switch-group {
    display: flex;
    background: #edf2f7;
    padding: 3px;
    border-radius: 8px;
    gap: 2px;
}

.bg-switch-btn {
    background: transparent;
    border: none;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    color: #4a5568;
    cursor: pointer;
    transition: all 0.2s ease;
}

.bg-switch-btn:hover {
    color: #1a202c;
}

.bg-switch-btn.active {
    background: #ffffff;
    color: var(--tool-accent);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
}

/* Caja de previsualización del canvas (Mesa de trabajo) */
.canvas-viewport {
    position: relative;
    border-radius: 12px;
    border: 1px solid var(--tool-border);
    background: #f8fafc;
    min-height: 130px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

/* Marco ajustado a la firma (Canvas Frame) */
.canvas-frame {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1.5px solid rgba(11, 145, 166, 0.45);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    max-width: 100%;
    overflow: hidden;
    transition: all 0.25s ease;
}

/* Fondos dinámicos aplicados EXCLUSIVAMENTE al marco de la firma */
.canvas-frame.bg-checkerboard {
    background-color: var(--checkerboard-color1);
    background-image: 
        linear-gradient(45deg, var(--checkerboard-color2) 25%, transparent 25%),
        linear-gradient(-45deg, var(--checkerboard-color2) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--checkerboard-color2) 75%),
        linear-gradient(-45deg, transparent 75%, var(--checkerboard-color2) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

.canvas-frame.bg-white {
    background-color: #ffffff;
}

.canvas-frame.bg-dark {
    background-color: #0f172a;
}

.canvas-frame.bg-document {
    background-color: #ffffff;
    background-image: linear-gradient(#e2e8f0 1px, transparent 1px);
    background-size: 100% 24px;
    box-shadow: inset 0 0 12px rgba(0,0,0,0.04), 0 4px 18px rgba(0,0,0,0.08);
}

#signature-canvas {
    display: block;
    width: min(100%, 460px);
    height: auto;
    max-height: 220px;
    object-fit: contain;
    transition: transform 0.2s ease;
}

/* Badge de dimensiones */
.canvas-dimensions {
    font-size: 12.5px;
    color: var(--tool-muted);
    text-align: center;
    font-weight: 600;
}

/* =====================================================
   RECORTE MANUAL: Overlay, Handles y Acciones
   ===================================================== */
.crop-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    cursor: crosshair;
}

.crop-overlay.hidden {
    display: none !important;
}

/* Scrim oscuro fuera de la zona de recorte (generado por box-shadow) */
.crop-box {
    position: absolute;
    border: 2px dashed rgba(11, 145, 166, 0.85);
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.45);
    z-index: 11;
    cursor: move;
    transition: none;
}

/* Handles de recorte */
.crop-handle {
    position: absolute;
    width: 14px;
    height: 14px;
    background: #ffffff;
    border: 2.5px solid #0b91a6;
    border-radius: 50%;
    z-index: 12;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
    transition: transform 0.1s ease;
}

.crop-handle:hover {
    transform: scale(1.3);
    background: #e0f7fa;
}

/* Posición de cada handle */
.crop-handle[data-handle="nw"] { top: -7px; left: -7px; cursor: nw-resize; }
.crop-handle[data-handle="n"]  { top: -7px; left: 50%; transform: translateX(-50%); cursor: n-resize; }
.crop-handle[data-handle="ne"] { top: -7px; right: -7px; cursor: ne-resize; }
.crop-handle[data-handle="e"]  { top: 50%; right: -7px; transform: translateY(-50%); cursor: e-resize; }
.crop-handle[data-handle="se"] { bottom: -7px; right: -7px; cursor: se-resize; }
.crop-handle[data-handle="s"]  { bottom: -7px; left: 50%; transform: translateX(-50%); cursor: s-resize; }
.crop-handle[data-handle="sw"] { bottom: -7px; left: -7px; cursor: sw-resize; }
.crop-handle[data-handle="w"]  { top: 50%; left: -7px; transform: translateY(-50%); cursor: w-resize; }

/* Barra de acciones de recorte */
.crop-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 8px 0 4px;
    animation: fadeSlideIn 0.2s ease-out;
}

.crop-actions.hidden {
    display: none !important;
}

.btn-crop-apply {
    background: linear-gradient(135deg, #0b91a6, #087a8c);
    color: #fff;
    border: none;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 13.5px;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(11, 145, 166, 0.35);
    transition: all 0.2s ease;
}

.btn-crop-apply:hover {
    background: linear-gradient(135deg, #087a8c, #066b7a);
    transform: translateY(-1px);
}

.btn-crop-cancel {
    background: transparent;
    color: #64748b;
    border: 1.5px solid #cbd5e1;
    padding: 8px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-crop-cancel:hover {
    background: #f1f5f9;
    border-color: #94a3b8;
    color: #334155;
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Columna Derecha: Panel de Controles */
.controls-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: #fcfdfe;
    border: 1px solid var(--tool-border);
    border-radius: 12px;
    padding: 22px;
}

.controls-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--tool-border);
    padding-bottom: 12px;
}

.controls-header h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--tool-heading);
    margin: 0;
}

.btn-reset {
    background: none;
    border: none;
    color: var(--tool-muted);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.btn-reset:hover {
    color: var(--tool-accent);
    background: #f0f7f9;
}

/* Grupos de sliders */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13.5px;
    font-weight: 600;
    color: #2d3748;
}

.control-value {
    color: var(--tool-accent);
    font-weight: 700;
    font-size: 13px;
    background: var(--tool-accent-light);
    padding: 2px 8px;
    border-radius: 12px;
}

/* Sliders estilizados */
.custom-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 5px;
    background: #e2e8f0;
    outline: none;
    transition: background 0.2s ease;
}

.custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--tool-accent);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(11, 145, 166, 0.35);
    transition: transform 0.15s ease, background 0.15s ease;
}

.custom-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    background: var(--tool-accent-hover);
}

.custom-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--tool-accent);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(11, 145, 166, 0.35);
}

.control-hint {
    font-size: 12px;
    color: var(--tool-muted);
    line-height: 1.4;
    margin: 0;
}

/* Selector de color de tinta */
.color-selector-group {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

.color-option-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 10px;
    border: 1.5px solid var(--tool-border);
    border-radius: 8px;
    background: #ffffff;
    font-size: 13px;
    font-weight: 600;
    color: #4a5568;
    cursor: pointer;
    transition: all 0.2s ease;
}

.color-option-btn:hover {
    border-color: #cbd5e0;
    background: #f7fafc;
}

.color-option-btn.active {
    border-color: var(--tool-accent);
    background: var(--tool-accent-light);
    color: var(--tool-heading);
}

.color-circle {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.15);
}

/* Acciones rápidas (recortar, rotar) */
.quick-tools {
    display: flex;
    gap: 8px;
    padding-top: 6px;
    border-top: 1px solid var(--tool-border);
}

.quick-tool-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: #edf2f7;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 12.5px;
    font-weight: 600;
    color: #334155;
    cursor: pointer;
    transition: all 0.2s ease;
}

.quick-tool-btn:hover {
    background: #e2e8f0;
    color: #0f172a;
}

/* Botones principales de descarga y copia */
.action-buttons-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.btn-download-png {
    background: #00b2a9;
    color: #ffffff;
    border: none;
    padding: 13px 20px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 14px rgba(0, 178, 169, 0.28);
    transition: all 0.25s ease;
}

.btn-download-png:hover {
    background: #009c94;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(0, 178, 169, 0.35);
}

.btn-copy-clipboard {
    background: #ffffff;
    color: #06233a;
    border: 1.5px solid #cbd5e0;
    padding: 11px 18px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn-copy-clipboard:hover {
    background: #f8fafc;
    border-color: #94a3b8;
}

.btn-new-signature {
    background: transparent;
    border: none;
    color: var(--tool-muted);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    padding: 6px;
    text-align: center;
    transition: color 0.2s ease;
}

.btn-new-signature:hover {
    color: var(--tool-accent);
    text-decoration: underline;
}

/* Tarjeta de integración con Firmar PDF */
.use-in-pdf-card {
    background: linear-gradient(135deg, #06233a 0%, #0f172a 100%);
    border-radius: 12px;
    padding: 16px;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: 4px;
}

.use-in-pdf-info {
    font-size: 13px;
}

.use-in-pdf-info strong {
    color: #5dd4d8;
    display: block;
    margin-bottom: 2px;
    font-size: 13.5px;
}

.use-in-pdf-info p {
    margin: 0;
    color: #cbd5e0;
    font-size: 12px;
}

.btn-use-pdf {
    background: #5dd4d8;
    color: #06233a;
    border: none;
    border-radius: 8px;
    padding: 8px 14px;
    font-size: 12.5px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.btn-use-pdf:hover {
    background: #7ee0e3;
    transform: translateY(-1px);
}

/* Toast de notificación (Copiado, etc.) */
.toast-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #06233a;
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

.toast-notification.show {
    opacity: 1;
    transform: translateY(0);
}

/* SEO Wrapper & Responsive */
.pdf-seo-wrapper {
    max-width: 800px;
    margin: 40px auto 0;
}

.tool-instructions {
    background: #ffffff;
    border: 1px solid var(--tool-border);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
}

.tool-instructions h3 {
    font-size: 20px;
    color: var(--tool-heading);
    margin-top: 0;
    margin-bottom: 16px;
}

.tool-instructions ol {
    padding-left: 20px;
    margin: 0;
}

.tool-instructions li {
    margin-bottom: 12px;
    color: #4a5568;
    line-height: 1.6;
    font-size: 15px;
}

.seo-content {
    color: #334155;
    line-height: 1.7;
    font-size: 15px;
}

.seo-content h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--tool-heading);
    margin-top: 36px;
    margin-bottom: 16px;
}

.seo-grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin: 24px 0;
}

.seo-card {
    background: #f8fafc;
    border: 1px solid var(--tool-border);
    border-radius: 12px;
    padding: 20px;
}

.seo-card h4 {
    margin: 0 0 8px;
    font-size: 16px;
    color: var(--tool-heading);
}

.seo-card p {
    margin: 0;
    font-size: 13.5px;
    color: var(--tool-muted);
    line-height: 1.5;
}

@media (max-width: 640px) {
    .tool-workspace {
        padding: 20px 16px;
    }

    .drop-zone {
        padding: 40px 16px;
    }

    .tool-header h1 {
        font-size: 26px;
    }

    .tool-header p {
        font-size: 15px;
    }

    .use-in-pdf-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn-use-pdf {
        width: 100%;
        justify-content: center;
    }
}