/* Quick Fill - mobile-first CSS */

/* ── Mode Selector ── */
.flex-mode-selector {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 24px;
    background: #e9ecef;
    border-radius: 24px;
    padding: 4px;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}
.flex-mode-selector .mode-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    color: #495057;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.flex-mode-selector .mode-btn.active {
    background: #007bff;
    color: #fff;
    box-shadow: 0 2px 6px rgba(0,123,255,0.3);
}
.flex-mode-selector .mode-btn:hover:not(.active) {
    background: #dee2e6;
}

/* ── Quick Fill Section ── */
.qf-section {
    max-width: 800px;
    margin: 0 auto;
    display: none;
}
.qf-section.visible {
    display: block;
}

/* ── Setup Form ── */
.qf-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}
.qf-form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 4px;
    color: #495057;
}
.qf-form-group input,
.qf-form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
    box-sizing: border-box;
}
.qf-form-group input:focus,
.qf-form-group select:focus {
    border-color: #007bff;
    outline: none;
}

.qf-show-grid-btn {
    display: block;
    width: 100%;
    padding: 14px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 10px;
    margin-bottom: 16px;
}

/* ── Grid Container ── */
.qf-grid-container {
    display: none;
}
.qf-grid-container.visible {
    display: block;
}

/* ── Legend ── */
.qf-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    padding: 10px 12px;
    background: #fff;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    margin-bottom: 12px;
    font-size: 0.85rem;
}
.qf-legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}
.qf-legend-swatch {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid #ccc;
    display: inline-block;
}

/* ── Toolbar ── */
.qf-toolbar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.qf-toolbar .btn {
    min-height: 38px;
    font-size: 0.85rem;
    border-radius: 8px;
}

/* ── Grid Table ── */
.qf-grid-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 16px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}
.qf-grid {
    border-collapse: collapse;
    min-width: 100%;
    font-size: 0.85rem;
}
.qf-grid th,
.qf-grid td {
    padding: 4px;
    text-align: center;
    border: 1px solid #dee2e6;
    white-space: nowrap;
}
.qf-grid th {
    background: #343a40;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 1;
    font-size: 0.8rem;
}
.qf-grid td:first-child,
.qf-grid th:first-child {
    position: sticky;
    left: 0;
    z-index: 2;
    background: #f8f9fa;
    font-weight: 600;
}
.qf-grid th:first-child {
    z-index: 3;
}

/* Grid cells */
.qf-grid td[data-qf] {
    min-width: 40px;
    min-height: 40px;
    height: 40px;
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.1s;
    font-weight: 600;
    font-size: 0.9rem;
}
.qf-grid td[data-qf]:active {
    filter: brightness(0.88);
}

/* Soft shift colors (no red outline, these are preferences) */
.qf-empty {
    background: #f8f9fa;
    color: #adb5bd;
}
.qf-soft-day {
    background: #fff3cd;
    color: #856404;
}
.qf-soft-evening {
    background: #cce5ff;
    color: #004085;
}
.qf-soft-night {
    background: #e2d5f1;
    color: #4a235a;
}
.qf-off {
    background: #e9ecef;
    color: #dc3545;
    font-weight: 700;
    outline: 3px solid #dc3545;
    outline-offset: -3px;
}

/* Weekend columns */
.qf-grid .qf-weekend {
    border-left: 2px solid #ffc107 !important;
}

/* ── CTA Button ── */
.qf-solve-btn {
    display: block;
    width: 100%;
    padding: 16px;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 12px;
    letter-spacing: 0.5px;
}

/* ── Mobile breakpoints ── */
@media (max-width: 480px) {
    .qf-form-grid {
        grid-template-columns: 1fr;
    }
    .flex-mode-selector {
        max-width: 100%;
    }
    .flex-mode-selector .mode-btn {
        font-size: 0.82rem;
        padding: 8px 10px;
    }
}

@media (max-width: 768px) {
    .qf-legend {
        position: sticky;
        top: 0;
        z-index: 50;
        border-radius: 0;
        margin-left: -15px;
        margin-right: -15px;
        padding: 8px 15px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    .qf-grid td[data-qf] {
        min-width: 36px;
        min-height: 36px;
        height: 36px;
        font-size: 0.85rem;
    }
    .qf-grid {
        font-size: 0.8rem;
    }
}