/* ==========================================================================
   Signature Scanner Dedicated Page Stylesheet (DocScan)
   ========================================================================== */

/* Page Hero */
.sig-page-hero {
    padding: 3.5rem 0 2rem 0;
    text-align: center;
}

.sig-breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    background: #ffffff;
    padding: 0.35rem 0.85rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
}

.sig-breadcrumb a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.sig-breadcrumb a:hover {
    text-decoration: underline;
}

.sig-pill-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 0.35rem 0.85rem;
    border-radius: 9999px;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.75rem;
}

.sig-page-hero h1 {
    font-size: 2.35rem;
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-main);
    margin-bottom: 1rem;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}

.sig-page-hero .hero-lead {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 780px;
    margin: 0 auto 1.5rem auto;
    line-height: 1.65;
}

/* Tool Switcher Banner */
.sig-switcher-banner {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.6rem 1.25rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.sig-switcher-banner a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.sig-switcher-banner a:hover {
    text-decoration: underline;
}

/* Studio Workspace Grid */
.sig-workspace-grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 4rem;
}

@media (max-width: 960px) {
    .sig-workspace-grid {
        grid-template-columns: 1fr;
    }
}

/* Studio Left Column: Controls & Upload */
.sig-studio-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 1.75rem;
}

/* Dropzone Card */
.sig-dropzone {
    background: #f8fafc;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.75rem 1.25rem;
    text-align: center;
    transition: all 0.2s ease;
    cursor: pointer;
    position: relative;
    margin-bottom: 1.25rem;
}

.sig-dropzone.dragover {
    border-color: var(--primary);
    background: #eff6ff;
}

.sig-dropzone.has-image {
    border-color: #22c55e;
    background: #f0fdf4;
}

.sig-dropzone-icon {
    margin-bottom: 0.75rem;
    color: var(--primary);
}

.sig-dropzone-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.35rem;
}

.sig-dropzone-sub {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.sig-actions-row {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
    flex-wrap: wrap;
}

.sig-actions-row .btn-primary,
.sig-actions-row .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    font-size: 0.88rem;
}

/* Adjustments Panel */
.sig-controls-panel {
    background: var(--bg-subtle);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.sig-controls-panel.disabled {
    opacity: 0.6;
    pointer-events: none;
}

.sig-control-group {
    margin-bottom: 1.2rem;
}

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

.sig-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.sig-label {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-main);
}

.sig-val-indicator {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
}

/* Pill Selectors */
.sig-pills-row {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
}

.sig-pill-btn {
    padding: 0.45rem 0.8rem;
    font-size: 0.84rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    background: #ffffff;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

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

.sig-pill-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* Range Sliders */
.sig-slider {
    width: 100%;
    accent-color: var(--primary);
    cursor: pointer;
}

/* Sizing Presets Select */
.sig-select {
    width: 100%;
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    background: #ffffff;
    color: var(--text-main);
    font-weight: 500;
}

/* Quick Tools Bar */
.sig-tools-bar {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.75rem;
}

.sig-tools-bar .btn-secondary {
    padding: 0.45rem 0.75rem;
    font-size: 0.82rem;
}

/* Studio Right Column: Live Signature Preview */
.sig-preview-panel {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 1.75rem;
    position: sticky;
    top: 5rem;
}

.sig-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.sig-preview-header h3 {
    font-size: 1.15rem;
    color: var(--text-main);
    margin: 0;
}

.sig-meta-tag {
    font-size: 0.78rem;
    color: var(--text-muted);
    background: #f1f5f9;
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
    font-weight: 600;
}

/* Checkerboard Background Canvas Viewport */
.sig-canvas-viewport {
    width: 100%;
    min-height: 240px;
    max-height: 380px;
    background-color: #ffffff;
    background-image: 
        linear-gradient(45deg, #f1f5f9 25%, transparent 25%), 
        linear-gradient(-45deg, #f1f5f9 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #f1f5f9 75%), 
        linear-gradient(-45deg, transparent 75%, #f1f5f9 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    overflow: hidden;
    position: relative;
    margin-bottom: 1.25rem;
}

.sig-canvas-viewport.bg-white {
    background-image: none;
    background-color: #ffffff;
}

.sig-canvas-viewport.bg-dark {
    background-image: none;
    background-color: #0f172a;
}

#sigPreviewCanvas {
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    display: block;
}

.sig-canvas-placeholder {
    color: var(--text-muted);
    text-align: center;
    font-size: 0.88rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

/* Canvas Wrapper & Interactive Crop System */
.sig-canvas-wrapper {
    position: relative;
    display: inline-block;
    max-width: 100%;
    max-height: 100%;
    user-select: none;
}

.sig-preview-crop-triggers {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.sig-preview-crop-triggers .btn-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.sig-crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: auto;
    touch-action: none;
    z-index: 20;
}

.sig-crop-overlay.hidden {
    display: none;
}

.sig-crop-svg-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.sig-crop-box {
    position: absolute;
    box-sizing: border-box;
    border: 2px solid #2563eb;
    background: transparent;
    cursor: move;
    touch-action: none;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.45);
    z-index: 25;
}

.sig-crop-grid-h1,
.sig-crop-grid-h2 {
    position: absolute;
    width: 100%;
    left: 0;
    border-top: 1px dashed rgba(255, 255, 255, 0.45);
    pointer-events: none;
}
.sig-crop-grid-h1 { top: 33.33%; }
.sig-crop-grid-h2 { top: 66.66%; }

.sig-crop-grid-v1,
.sig-crop-grid-v2 {
    position: absolute;
    height: 100%;
    top: 0;
    border-left: 1px dashed rgba(255, 255, 255, 0.45);
    pointer-events: none;
}
.sig-crop-grid-v1 { left: 33.33%; }
.sig-crop-grid-v2 { left: 66.66%; }

/* Crop Handles */
.sig-crop-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    background: #ffffff;
    border: 2px solid #2563eb;
    border-radius: 2px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
    z-index: 30;
    touch-action: none;
}

.sig-crop-handle::after {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
}

.sig-crop-handle.handle-nw { top: -6px; left: -6px; cursor: nwse-resize; }
.sig-crop-handle.handle-ne { top: -6px; right: -6px; cursor: nesw-resize; }
.sig-crop-handle.handle-se { bottom: -6px; right: -6px; cursor: nwse-resize; }
.sig-crop-handle.handle-sw { bottom: -6px; left: -6px; cursor: nesw-resize; }

.sig-crop-handle.handle-n { top: -6px; left: calc(50% - 6px); cursor: ns-resize; }
.sig-crop-handle.handle-s { bottom: -6px; left: calc(50% - 6px); cursor: ns-resize; }
.sig-crop-handle.handle-e { right: -6px; top: calc(50% - 6px); cursor: ew-resize; }
.sig-crop-handle.handle-w { left: -6px; top: calc(50% - 6px); cursor: ew-resize; }

/* Active Crop Toolbar */
.sig-crop-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.85rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.sig-crop-toolbar.hidden {
    display: none;
}

.sig-crop-hint {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.82rem;
    color: #1e40af;
    font-weight: 600;
}

.sig-crop-toolbar-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.sig-crop-toolbar-actions .btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.82rem;
}

/* Export Actions */
.sig-export-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.sig-export-actions .btn-group-row {
    display: flex;
    gap: 0.75rem;
}

.sig-export-actions .btn-group-row button {
    flex: 1;
}

/* Viewport Background Switcher */
.sig-view-bg-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    justify-content: flex-end;
}

.sig-bg-pill {
    cursor: pointer;
    border: 1px solid var(--border-color);
    background: #ffffff;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
}

.sig-bg-pill.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* Fullscreen Camera Modal */
.sig-camera-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.95);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.sig-camera-modal.hidden {
    display: none;
}

.sig-camera-box {
    background: #1e293b;
    border-radius: var(--radius-lg);
    max-width: 680px;
    width: 100%;
    overflow: hidden;
    color: #ffffff;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.sig-camera-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: rgba(0, 0, 0, 0.3);
}

.sig-camera-view-wrap {
    position: relative;
    width: 100%;
    background: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

#sigCameraVideo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sig-card-guide-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    aspect-ratio: 2.5 / 1;
    border: 2px dashed #38bdf8;
    border-radius: 8px;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
    pointer-events: none;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 0.75rem;
}

.sig-guide-hint {
    background: rgba(0, 0, 0, 0.75);
    color: #ffffff;
    font-size: 0.78rem;
    padding: 0.25rem 0.65rem;
    border-radius: 9999px;
    font-weight: 500;
}

.sig-camera-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: rgba(0, 0, 0, 0.3);
}

/* Semantic Content Sections */
.section-sig-content {
    width: 100%;
    padding: 4.5rem 0;
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.section-sig-content.section-sig-alt {
    background-color: var(--bg-main);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.sig-table-wrap {
    overflow-x: auto;
    margin: 2rem 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: #ffffff;
    -webkit-overflow-scrolling: touch;
}

.sig-semantic-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.92rem;
}

.sig-semantic-table th, 
.sig-semantic-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.sig-semantic-table th {
    background: #f1f5f9;
    font-weight: 700;
    color: var(--text-main);
}

.sig-semantic-table tr:last-child td {
    border-bottom: none;
}

.sig-semantic-table td strong {
    color: var(--primary);
}

/* Steps Grid */
.sig-steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.sig-step-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.sig-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: 9999px;
    margin-bottom: 0.85rem;
}

.sig-step-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.sig-step-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* ==========================================================================
   Mobile-Friendly Responsive Optimization
   ========================================================================== */

@media (max-width: 960px) {
    .sig-workspace-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 3rem;
    }

    .sig-preview-panel {
        position: static;
        top: auto;
    }
}

@media (max-width: 640px) {
    .sig-page-hero {
        padding: 1.75rem 0 1rem 0;
    }

    .sig-page-hero h1 {
        font-size: 1.6rem;
        line-height: 1.3;
        margin-bottom: 0.75rem;
    }

    .sig-page-hero .hero-lead {
        font-size: 0.95rem;
        line-height: 1.6;
        margin-bottom: 1.25rem;
    }

    .sig-switcher-banner {
        font-size: 0.82rem;
        padding: 0.6rem 0.9rem;
        line-height: 1.45;
        gap: 0.5rem;
        width: 100%;
        margin-bottom: 1.5rem;
    }

    .sig-breadcrumb {
        font-size: 0.8rem;
        padding: 0.25rem 0.7rem;
    }

    .sig-studio-card,
    .sig-preview-panel {
        padding: 1.15rem 1rem;
        border-radius: var(--radius-md);
    }

    .sig-dropzone {
        padding: 1.25rem 0.75rem;
    }

    .sig-actions-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .sig-actions-row button {
        min-height: 44px;
        font-size: 0.9rem;
        width: 100%;
        justify-content: center;
    }

    .sig-pills-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }

    .sig-pill-btn {
        min-height: 42px;
        font-size: 0.82rem;
        justify-content: center;
        text-align: center;
    }

    .sig-select {
        min-height: 44px;
        font-size: 0.92rem;
    }

    .sig-tools-bar button {
        min-height: 44px;
        font-size: 0.84rem;
        flex: 1;
    }

    .sig-canvas-viewport {
        min-height: 200px;
        max-height: 280px;
        padding: 0.5rem;
    }

    .sig-export-actions .btn-primary {
        min-height: 50px;
        font-size: 0.98rem;
        font-weight: 700;
        width: 100%;
    }

    .sig-export-actions .btn-group-row {
        display: flex;
        gap: 0.5rem;
    }

    .sig-export-actions .btn-group-row button {
        min-height: 44px;
        font-size: 0.85rem;
        font-weight: 600;
    }

    #btnSigOpenEditor {
        min-height: 46px;
        font-size: 0.85rem;
        padding: 0.6rem 0.75rem;
        white-space: normal;
        text-align: center;
        line-height: 1.35;
    }

    /* Fullscreen Mobile Camera Viewfinder */
    .sig-camera-modal {
        padding: 0;
        background: #000000;
    }

    .sig-camera-box {
        width: 100%;
        height: 100%;
        max-width: 100%;
        border-radius: 0;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .sig-camera-header {
        padding: 0.85rem 1.15rem;
        background: rgba(15, 23, 42, 0.9);
        backdrop-filter: blur(8px);
        z-index: 10;
    }

    .sig-camera-view-wrap {
        flex: 1;
        aspect-ratio: unset;
        height: auto;
        width: 100%;
        position: relative;
    }

    .sig-card-guide-overlay {
        width: 90%;
        max-width: 360px;
        border-width: 2.5px;
        box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.65);
    }

    .sig-camera-footer {
        padding: 1.25rem 1rem;
        background: rgba(15, 23, 42, 0.9);
        backdrop-filter: blur(8px);
        z-index: 10;
        display: flex;
        justify-content: space-around;
        align-items: center;
    }

    #btnSigCaptureCamera {
        width: 66px;
        height: 66px;
        border-radius: 50%;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.35);
    }

    #btnSigCaptureCamera span {
        display: none;
    }

    #btnSigCaptureCamera svg {
        width: 28px;
        height: 28px;
    }

    .section-sig-content {
        padding: 2.75rem 0;
    }

    .section-sig-content h2 {
        font-size: 1.45rem !important;
        line-height: 1.35;
    }

    .sig-steps-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .sig-step-card {
        padding: 1.25rem 1rem;
    }
}