/**
 * FotoDigital Photobook - Double Page Spread Styles
 */

/* ── GUTTER LINE (linea centrale tratteggiata) ──────────────── */
.mc-spread-gutter {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    background: repeating-linear-gradient(
        to bottom,
        #999 0px,
        #999 4px,
        transparent 4px,
        transparent 8px
    );
    pointer-events: none;
    z-index: 100;
    opacity: 0.7;
}

.mc-spread-gutter::before,
.mc-spread-gutter::after {
    content: '';
    position: absolute;
    left: 0;
    width: 1px;
    height: 20px;
}

.mc-spread-gutter::before {
    top: 0;
    background: linear-gradient(to bottom, transparent, #999);
}

.mc-spread-gutter::after {
    bottom: 0;
    background: linear-gradient(to top, transparent, #999);
}

/* ── GUTTER ZONE (area semi-trasparente di avviso) ──────────── */
.mc-spread-gutter-zone {
    position: absolute;
    top: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 99;
}

.mc-spread-gutter-zone--left {
    right: 50%;
    width: 20px; /* ~5mm mappato a pixel */
    background: linear-gradient(
        to left,
        rgba(255, 140, 0, 0.10),
        transparent
    );
}

.mc-spread-gutter-zone--right {
    left: 50%;
    width: 20px;
    background: linear-gradient(
        to right,
        rgba(255, 140, 0, 0.10),
        transparent
    );
}

/* ── SPREAD LABELS (etichette pagina sui lati) ──────────────── */
.mc-spread-labels {
    position: absolute;
    top: 4px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    z-index: 101;
    padding: 0 8px;
}

.mc-spread-labels span {
    font-size: 10px;
    color: #aaa;
    font-family: Arial, sans-serif;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.6);
    padding: 1px 6px;
    border-radius: 3px;
}

/* ── PAGE THUMB - SPREAD (thumbnail doppia nella strip) ─────── */
.mc-page-thumb.spread.spread-left {
    min-width: 120px;
    flex-shrink: 0;
}

.mc-page-thumb.spread.spread-left .mc-page-thumb-img {
    width: 120px;
    aspect-ratio: 2 / 1;
    position: relative;
}

.mc-page-thumb.spread.spread-right {
    display: none;
}

/* ── SPREAD BADGE ────────────────────────────────────────────── */
.mc-spread-badge {
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-size: 8px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 3px;
    line-height: 1.2;
    z-index: 5;
    pointer-events: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

/* ── SPREAD TOGGLE (switch on/off) ──────────────────────────── */
.mc-spread-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    padding: 6px 0;
}

.mc-spread-toggle input[type="checkbox"] {
    display: none;
}

.mc-spread-toggle-slider {
    position: relative;
    width: 36px;
    height: 20px;
    background: #ccc;
    border-radius: 10px;
    transition: background 0.25s ease;
    flex-shrink: 0;
}

.mc-spread-toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.25s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.mc-spread-toggle input[type="checkbox"]:checked + .mc-spread-toggle-slider {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.mc-spread-toggle input[type="checkbox"]:checked + .mc-spread-toggle-slider::after {
    transform: translateX(16px);
}

.mc-spread-toggle-label {
    font-size: 13px;
    color: #444;
    font-weight: 500;
}

/* ── SPREAD SECTION (nel pannello strumenti) ────────────────── */
.mc-spread-section {
    border-top: 1px solid #eee;
    padding-top: 12px;
    margin-top: 12px;
}

.mc-spread-section .mc-tool-section-title {
    font-size: 12px;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.mc-spread-controls {
    padding: 4px 0;
}

.mc-spread-controls .mc-btn-outline {
    width: 100%;
    border: 1px solid #ddd;
    background: #fff;
    color: #555;
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    justify-content: center;
}

.mc-spread-controls .mc-btn-outline:hover {
    border-color: #667eea;
    color: #667eea;
    background: rgba(102, 126, 234, 0.04);
}

/* ── SPREAD INDICATOR (nella bottom bar) ────────────────────── */
.mc-spread-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 12px;
    padding: 3px 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
    letter-spacing: 0.3px;
    vertical-align: middle;
    animation: mc-spread-fadein 0.3s ease;
}

.mc-spread-indicator .spread-icon {
    display: inline-block;
    width: 14px;
    height: 10px;
    border: 1.5px solid #fff;
    border-radius: 1px;
    position: relative;
}

.mc-spread-indicator .spread-icon::after {
    content: '';
    position: absolute;
    top: 1px;
    bottom: 1px;
    left: 50%;
    width: 1px;
    background: #fff;
    opacity: 0.6;
}

@keyframes mc-spread-fadein {
    from { opacity: 0; transform: translateY(2px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── CANVAS WRAPPER in spread mode ──────────────────────────── */
.mc-canvas-spread-mode #canvas-wrapper {
    position: relative;
}

.mc-canvas-spread-mode .canvas-container {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.12);
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 768px) {
    .mc-page-thumb.spread.spread-left {
        min-width: 90px;
    }

    .mc-page-thumb.spread.spread-left .mc-page-thumb-img {
        width: 90px;
    }

    .mc-spread-badge {
        font-size: 7px;
        padding: 1px 5px;
    }

    .mc-spread-indicator {
        font-size: 10px;
        padding: 2px 6px;
    }
}