/* PickShot Web Viewer - Style */

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --bg-surface: #222244;
    --bg-hover: #2a2a4a;
    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-muted: #555577;
    --accent-blue: #0A84FF;
    --accent-blue-dim: rgba(10, 132, 255, 0.3);
    --accent-green: #30D158;
    --accent-green-dim: rgba(48, 209, 88, 0.2);
    --accent-red: #FF453A;
    --border-color: #333355;
    --border-active: #0A84FF;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --header-h: 48px;
    --bottom-h: 56px;
    --sidebar-w: 30%;
    --transition: 0.15s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100dvh;  /* iOS Safari 주소창 대응 */
    height: 100%;
    overflow: hidden;
    -webkit-overflow-scrolling: touch;
    font-family: -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ─── Loading Screen ─── */
.loading-screen {
    position: fixed; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-primary);
    z-index: 1000;
    transition: opacity 0.3s;
}
.loading-screen.fade-out { opacity: 0; pointer-events: none; }
.loading-content { text-align: center; }
.loading-logo {
    font-size: 36px; font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), #6366f1);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.loading-subtitle {
    font-size: 14px; color: var(--text-secondary);
    margin-top: 4px;
}
.loading-spinner {
    width: 32px; height: 32px; margin: 24px auto 16px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
.loading-spinner.small { width: 24px; height: 24px; border-width: 2px; margin: 0; }
.loading-message { font-size: 13px; color: var(--text-secondary); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Empty State ─── */
.empty-state {
    position: fixed; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-primary);
    z-index: 900;
}
.empty-content { text-align: center; max-width: 500px; padding: 32px; }
.empty-icon { font-size: 64px; margin-bottom: 16px; }
.empty-content h2 {
    font-size: 28px; font-weight: 700; margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-blue), #6366f1);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.empty-content p { color: var(--text-secondary); margin-bottom: 8px; }
.empty-hint { font-size: 12px; color: var(--text-muted); margin-bottom: 24px; }
.empty-hint code {
    display: inline-block; margin-top: 8px; padding: 6px 10px;
    background: var(--bg-surface); border-radius: var(--radius-sm);
    font-size: 11px; color: var(--text-secondary); word-break: break-all;
}
.empty-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ─── Buttons ─── */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; border: none; border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 500; cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
    background: var(--accent-blue); color: white;
}
.btn-primary:hover:not(:disabled) { background: #0070e0; }
.btn-secondary {
    background: var(--bg-surface); color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover:not(:disabled) { background: var(--bg-hover); }
.btn-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; border: none; border-radius: var(--radius-sm);
    background: transparent; color: var(--text-secondary);
    cursor: pointer; transition: all var(--transition);
}
.btn-icon:hover { background: var(--bg-hover); color: var(--text-primary); }

/* ─── App Layout ─── */
.app {
    display: flex; flex-direction: column;
    height: 100dvh; width: 100vw;
    height: 100vh; /* fallback */
    max-height: -webkit-fill-available;
}

/* ─── Header ─── */
.header {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--header-h); padding: 0 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0; z-index: 10;
}
.header-left, .header-right { display: flex; align-items: center; gap: 8px; }
.header-logo {
    font-size: 16px; font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), #6366f1);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.header-separator { color: var(--border-color); }
.header-session { font-size: 14px; font-weight: 500; }
.header-client {
    font-size: 13px; color: var(--text-secondary);
    padding: 4px 12px; background: var(--bg-surface);
    border-radius: 100px;
}
.header-count {
    font-size: 13px; color: var(--accent-green); font-weight: 500;
    font-variant-numeric: tabular-nums;
}

/* ─── Main Content ─── */
.main-content {
    display: flex; flex: 1; overflow: hidden;
}

/* ─── Sidebar ─── */
.sidebar {
    width: var(--sidebar-w); min-width: 240px; max-width: 400px;
    display: flex; flex-direction: column;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
}
.sidebar-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 12px; border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.sidebar-title { font-size: 12px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.sidebar-controls { display: flex; gap: 4px; }

/* ─── Thumbnail Grid ─── */
.thumbnail-grid {
    flex: 1; overflow-y: auto; overflow-x: hidden;
    padding: 8px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 6px;
    align-content: start;
}
.thumbnail-grid::-webkit-scrollbar { width: 6px; }
.thumbnail-grid::-webkit-scrollbar-track { background: transparent; }
.thumbnail-grid::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
.thumbnail-grid::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

.thumb-item {
    position: relative; aspect-ratio: 4/3;
    border-radius: var(--radius-sm);
    overflow: hidden; cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition), transform var(--transition);
    background: var(--bg-surface);
}
.thumb-item:hover { border-color: var(--text-muted); }
.thumb-item.active { border-color: var(--accent-blue); }
.thumb-item.selected::after {
    content: '';
    position: absolute; top: 4px; right: 4px;
    width: 22px; height: 22px;
    background: var(--accent-green);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg width='14' height='14' viewBox='0 0 14 14' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M3 7l3 3 5-5' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    z-index: 2;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.thumb-item img {
    width: 100%; height: 100%; object-fit: contain;
    transition: opacity 0.2s;
}
.thumb-item img.loading { opacity: 0; }
.thumb-number {
    position: absolute; bottom: 2px; left: 4px;
    font-size: 10px; color: rgba(255,255,255,0.7);
    text-shadow: 0 1px 2px rgba(0,0,0,0.8);
    z-index: 1;
}
.thumb-rating {
    position: absolute; top: 2px; left: 4px;
    font-size: 10px; color: #FFC107;
    text-shadow: 0 1px 2px rgba(0,0,0,0.9);
    letter-spacing: -1px;
    z-index: 1;
}

/* ─── Preview Area ─── */
.preview-area {
    flex: 1; display: flex; flex-direction: column;
    overflow: hidden; min-width: 0;
}
.preview-container {
    flex: 1; position: relative;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden; background: var(--bg-primary);
    cursor: zoom-in;
}
.preview-container.zoomed { cursor: zoom-out; overflow: auto; }
.preview-image {
    max-width: 100%; max-height: 100%;
    object-fit: contain;
    transition: none;
    user-select: none;
    -webkit-user-drag: none;
}
.preview-container.zoomed .preview-image {
    max-width: none; max-height: none;
    cursor: grab;
}
.preview-container.zoomed .preview-image.grabbing { cursor: grabbing; }
.preview-loading {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(26,26,46,0.8);
}
.drawing-canvas {
    position: absolute; inset: 0;
    z-index: 5; pointer-events: none;
}

/* ─── Preview Footer ─── */
.preview-footer {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}
.photo-info {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 6px; gap: 12px;
}
.photo-filename { font-size: 12px; font-weight: 500; }
.photo-index { font-size: 12px; color: var(--text-secondary); font-variant-numeric: tabular-nums; }

/* Rating Stars */
.rating-stars {
    display: inline-flex; gap: 2px;
    user-select: none;
    margin-left: auto;
}
.rating-stars .star {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.25);
    cursor: pointer;
    transition: color 0.12s ease, transform 0.12s ease;
    line-height: 1;
    text-shadow: 0 0 1px rgba(0, 0, 0, 0.4);
}
.rating-stars .star:hover {
    transform: scale(1.15);
}
.rating-stars .star.filled {
    color: #FFC107;
}
.rating-stars .star.hovered {
    color: #FFD54F;
}
@media (max-width: 600px) {
    .rating-stars .star { font-size: 22px; padding: 2px; }
}
.comment-area { display: flex; gap: 8px; }
.comment-input {
    flex: 1; padding: 8px 10px;
    background: var(--bg-surface); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 13px;
    font-family: inherit; resize: none;
    transition: border-color var(--transition);
}
.comment-input:focus { outline: none; border-color: var(--accent-blue); }
.comment-input::placeholder { color: var(--text-muted); }

/* ─── Bottom Bar ─── */
.bottom-bar {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--bottom-h); padding: 0 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0; z-index: 10;
}
.bottom-left, .bottom-center, .bottom-right {
    display: flex; align-items: center; gap: 8px;
}
.btn-nav {
    width: 36px; height: 36px; padding: 0;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--bg-surface); color: var(--text-primary);
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
}
.btn-nav:hover { background: var(--bg-hover); }
.nav-divider {
    width: 1px; height: 24px;
    background: var(--border-color);
    margin: 0 4px;
}
.btn-sp {
    padding: 8px 20px;
    background: var(--bg-surface); color: var(--text-primary);
    border: 1px solid var(--border-color);
    font-weight: 600;
}
.btn-sp:hover { background: var(--bg-hover); }
.btn-sp.active {
    background: var(--accent-green-dim);
    border-color: var(--accent-green);
    color: var(--accent-green);
}
.btn-tool {
    padding: 6px 12px;
    background: transparent; color: var(--text-secondary);
    border: 1px solid transparent;
}
.btn-tool:hover:not(:disabled) { color: var(--text-primary); background: var(--bg-hover); }
.btn-tool.active { color: var(--accent-blue); border-color: var(--accent-blue-dim); }
.btn-label { font-size: 11px; }
.btn-submit {
    padding: 8px 24px;
    background: var(--accent-blue); color: white;
    font-weight: 600; border-radius: var(--radius-sm);
}
.btn-submit:hover { background: #0070e0; }

/* ─── Modal ─── */
.modal {
    position: fixed; inset: 0;
    display: flex; align-items: center; justify-content: center;
    z-index: 100;
}
.modal-backdrop {
    position: absolute; inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
}
.modal-content {
    position: relative;
    width: 90%; max-width: 560px; max-height: 80vh;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex; flex-direction: column;
    box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 { font-size: 18px; font-weight: 600; }
.modal-close { font-size: 24px; color: var(--text-secondary); width: 32px; height: 32px; }
.modal-body {
    flex: 1; overflow-y: auto; padding: 20px;
}
.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex; gap: 12px; justify-content: flex-end;
}
.submit-summary {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 12px; margin-bottom: 20px;
}
.summary-item {
    padding: 12px; background: var(--bg-surface);
    border-radius: var(--radius-sm);
}
.summary-label { display: block; font-size: 11px; color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.summary-value { font-size: 15px; font-weight: 600; }
.selected-list {
    max-height: 200px; overflow-y: auto;
}
.selected-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px; border-radius: var(--radius-sm);
    transition: background var(--transition);
}
.selected-item:hover { background: var(--bg-hover); }
.selected-item-thumb {
    width: 40px; height: 40px; border-radius: 4px;
    object-fit: cover;
}
.selected-item-name { font-size: 13px; flex: 1; }
.selected-item-comment { font-size: 11px; color: var(--text-secondary); max-width: 200px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ─── Toast ─── */
.toast {
    position: fixed; bottom: 80px; left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px; color: var(--text-primary);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    z-index: 200;
    animation: toast-in 0.2s ease;
}
.toast.fade-out { animation: toast-out 0.3s ease forwards; }
@keyframes toast-in { from { opacity: 0; transform: translateX(-50%) translateY(10px); } }
@keyframes toast-out { to { opacity: 0; transform: translateX(-50%) translateY(10px); } }

/* ─── Mobile Responsive ─── */
@media (max-width: 768px) {
    :root {
        --sidebar-w: 100%;
        --header-h: 44px;
        --bottom-h: 52px;
    }

    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%; min-width: unset; max-width: unset;
        order: 2;
        height: 120px; min-height: 100px;
        border-right: none; border-top: 1px solid var(--border-color);
    }

    .sidebar-header { display: none; }

    .thumbnail-grid {
        display: flex; flex-wrap: nowrap;
        overflow-x: auto; overflow-y: hidden;
        padding: 6px;
        gap: 4px;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x proximity;
    }

    .thumb-item {
        flex: 0 0 80px; height: 80px;
        aspect-ratio: unset;
        scroll-snap-align: center;
    }

    .preview-area { order: 1; flex: 1; }

    .preview-footer { padding: 6px 12px; }
    .comment-input { font-size: 14px; }

    .header-center { display: none; }
    .header-session { font-size: 13px; }

    .bottom-bar {
        padding: 6px 8px;
        height: auto;
        min-height: var(--bottom-h);
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 6px;
    }
    .btn-label { display: none; }
    .btn-tool { padding: 6px 8px; display: none; }  /* 펜/줌/필터 모바일 숨김 */
    .btn-submit { padding: 8px 14px; font-size: 13px; font-weight: 700; white-space: nowrap; }
    .btn-sp { padding: 8px 14px; font-size: 13px; font-weight: 700; white-space: nowrap; }
    .btn-nav { width: 32px; height: 32px; flex-shrink: 0; }
    #btn-download-original { display: flex !important; }
    #btn-download-original .btn-label { display: inline !important; font-size: 11px; }
    .bottom-left { gap: 4px; flex-shrink: 0; }
    .bottom-center { gap: 4px; flex-shrink: 0; }
    .bottom-right { gap: 4px; flex-shrink: 0; }

    .modal-content { width: 95%; max-height: 90vh; }
    .submit-summary { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .sidebar { height: 100px; }
    .thumb-item { flex: 0 0 68px; height: 68px; }
    .header-count { font-size: 11px; }
}

/* ─── Transitions & Animations ─── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* 펜 캔버스 */
.pen-canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    cursor: crosshair;
    z-index: 10;
}
.pen-canvas.hidden { display: none; }

/* 한글 버튼 */
.btn-text-small {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 10px;
    padding: 2px 6px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-text-small:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* 펜 도구 활성 상태 */
.btn.btn-tool.pen-active {
    background: var(--accent) !important;
    color: white !important;
}

/* 펜 색상 선택 바 */
.pen-toolbar {
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 4px 8px;
    background: var(--bg-secondary);
    border-radius: 6px;
    position: absolute;
    top: 10px; right: 10px;
    z-index: 20;
}
.pen-toolbar.hidden { display: none; }
.pen-color {
    width: 20px; height: 20px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
}
.pen-color.active { border-color: white; }
.pen-color.red { background: #FF3B30; }
.pen-color.blue { background: #0A84FF; }
.pen-color.green { background: #30D158; }
.pen-undo {
    background: none; border: none; color: var(--text-secondary);
    cursor: pointer; font-size: 14px; padding: 2px 6px;
}
.pen-undo:hover { color: white; }
.pen-clear {
    background: none; border: none; color: #FF3B30;
    cursor: pointer; font-size: 11px; padding: 2px 6px;
}

/* ═══════════════════════════════════════════════
   사용법 가이드 모달 (Help Modal)
═══════════════════════════════════════════════ */
.help-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.help-modal.hidden { display: none; }
.help-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.help-content {
    position: relative;
    background: linear-gradient(145deg, #1d2436 0%, #141826 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    max-width: 520px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
    animation: helpFadeIn 0.25s ease-out;
}
@keyframes helpFadeIn {
    from { opacity: 0; transform: translateY(20px) scale(0.96); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
.help-header {
    text-align: center;
    margin-bottom: 28px;
}
.help-icon {
    font-size: 44px;
    margin-bottom: 10px;
    filter: drop-shadow(0 4px 12px rgba(52, 105, 255, 0.4));
}
.help-title {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 6px 0;
    letter-spacing: -0.01em;
}
.help-subtitle {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
    line-height: 1.5;
}
.help-body { padding: 0; }
.help-section {
    margin-bottom: 22px;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
}
.help-section:last-child { margin-bottom: 0; }
.help-section-title {
    font-size: 13px;
    font-weight: 700;
    color: #3469ff;
    margin: 0 0 10px 0;
    letter-spacing: 0.02em;
}
.help-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.85);
}
.help-row + .help-row {
    border-top: 1px dashed rgba(255, 255, 255, 0.05);
}
.help-kbd {
    display: inline-block;
    padding: 3px 8px;
    min-width: 26px;
    text-align: center;
    font-family: 'SF Mono', 'Courier New', monospace;
    font-size: 11.5px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(180deg, #3a4154 0%, #282f40 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 5px;
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    margin-right: 2px;
}
.help-click, .help-gesture {
    font-size: 12px;
    font-weight: 600;
    color: #30D158;
    padding: 4px 10px;
    background: rgba(48, 209, 88, 0.12);
    border-radius: 6px;
    white-space: nowrap;
}
.help-desc {
    flex: 1;
    color: rgba(255, 255, 255, 0.75);
    font-size: 13px;
}
.help-footer {
    margin-top: 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.help-dont-show {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.55);
    cursor: pointer;
    user-select: none;
}
.help-dont-show input { cursor: pointer; }
.help-btn-close {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 700;
    background: linear-gradient(135deg, #3469ff, #5B8DFF);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}
.help-btn-close:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(52, 105, 255, 0.4);
}

/* 도움말 플로팅 버튼 */
.btn-help-float {
    position: fixed;
    right: 18px;
    bottom: 70px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(52, 105, 255, 0.15);
    border: 1px solid rgba(52, 105, 255, 0.4);
    color: #5B8DFF;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    z-index: 100;
    transition: all 0.2s;
    backdrop-filter: blur(10px);
}
.btn-help-float:hover {
    background: rgba(52, 105, 255, 0.3);
    transform: scale(1.08);
}

@media (max-width: 720px) {
    .help-content { padding: 22px 18px; max-width: 95vw; }
    .help-title { font-size: 19px; }
    .help-section-title { font-size: 12px; }
    .help-row { font-size: 12px; }
    .btn-help-float { bottom: 90px; right: 14px; width: 34px; height: 34px; }
}

/* ═══════════════════════════════════════════════
   선택 리미트 — 색상 단계 + shake 애니메이션
═══════════════════════════════════════════════ */
.header-count {
    transition: color 0.25s, background 0.25s;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 6px;
}
.header-count.count-green {
    color: #34C759;
    background: rgba(52, 199, 89, 0.12);
}
.header-count.count-yellow {
    color: #FFCC00;
    background: rgba(255, 204, 0, 0.15);
}
.header-count.count-red {
    color: #FF9F0A;
    background: rgba(255, 159, 10, 0.18);
}
.header-count.count-full {
    color: #FF3B30;
    background: rgba(255, 59, 48, 0.22);
    font-weight: 800;
}
.header-count.flash-error {
    animation: flashError 0.8s ease;
}
@keyframes flashError {
    0%, 100% { background: rgba(255, 59, 48, 0.22); }
    50% { background: rgba(255, 59, 48, 0.55); transform: scale(1.06); }
}

/* 썸네일 shake — 리미트 도달 시 선택 시도할 때 */
.thumb-item.shake-error {
    animation: shakeError 0.4s cubic-bezier(.36,.07,.19,.97);
}
@keyframes shakeError {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* ═══════════════════════════════════════════════════════════
   🎨 v2 UI 전면 개편 — Modern Gallery Redesign (2026-04)
   기존 스타일 위에 override. !important 로 우선순위 보장.
═══════════════════════════════════════════════════════════ */

/* 전체 색상 팔레트 재설계 */
:root {
    --v2-bg-deep: #0B0E1A !important;
    --v2-bg-base: #12172A !important;
    --v2-bg-elev: #1A2040 !important;
    --v2-bg-glass: rgba(26, 32, 64, 0.72) !important;
    --v2-surface: #1E2440 !important;
    --v2-surface-hover: #2A3158 !important;
    --v2-border: rgba(255, 255, 255, 0.08) !important;
    --v2-border-strong: rgba(255, 255, 255, 0.18) !important;
    --v2-text: #F0F2F8 !important;
    --v2-text-dim: rgba(240, 242, 248, 0.65) !important;
    --v2-text-muted: rgba(240, 242, 248, 0.35) !important;
    --v2-accent: #6B8DFF !important;
    --v2-accent-glow: rgba(107, 141, 255, 0.4) !important;
    --v2-success: #30D974 !important;
    --v2-success-glow: rgba(48, 217, 116, 0.35) !important;
    --v2-danger: #FF4757 !important;
    --v2-warn: #FFB800 !important;
}

html, body {
    background: radial-gradient(ellipse at top, #151B35 0%, #0B0E1A 65%) !important;
    color: var(--v2-text) !important;
    font-feature-settings: 'ss01', 'cv11' !important;
    letter-spacing: -0.01em !important;
}

/* ─── Header: 글래스 블러 + 미니멀 ─── */
.header {
    height: 56px !important;
    padding: 0 20px !important;
    background: var(--v2-bg-glass) !important;
    backdrop-filter: blur(24px) saturate(1.6) !important;
    -webkit-backdrop-filter: blur(24px) saturate(1.6) !important;
    border-bottom: 1px solid var(--v2-border) !important;
    display: flex !important;
    align-items: center !important;
    gap: 20px !important;
    position: relative !important;
    z-index: 100 !important;
}
.header-logo {
    font-size: 15px !important;
    font-weight: 800 !important;
    background: linear-gradient(135deg, #6B8DFF 0%, #A855F7 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    letter-spacing: -0.02em !important;
}
.header-separator {
    color: var(--v2-text-muted) !important;
    margin: 0 2px !important;
    font-weight: 300 !important;
}
.header-session {
    font-size: 13px !important;
    font-weight: 600 !important;
    color: var(--v2-text) !important;
    opacity: 0.9 !important;
}
.header-client {
    font-size: 13px !important;
    font-weight: 600 !important;
    color: var(--v2-text-dim) !important;
    padding: 5px 12px !important;
    background: rgba(107, 141, 255, 0.12) !important;
    border: 1px solid rgba(107, 141, 255, 0.25) !important;
    border-radius: 20px !important;
}
.header-client::before {
    content: "👤 ";
    margin-right: 4px;
}
.header-count {
    font-size: 12.5px !important;
    font-weight: 700 !important;
    padding: 6px 14px !important;
    border-radius: 20px !important;
    background: rgba(255, 255, 255, 0.06) !important;
    color: var(--v2-text) !important;
    font-variant-numeric: tabular-nums !important;
}

/* ─── Main Content Layout ─── */
.main-content {
    background: transparent !important;
    gap: 0 !important;
}

/* ─── Sidebar (썸네일 그리드) ─── */
.sidebar {
    background: var(--v2-bg-base) !important;
    border-right: 1px solid var(--v2-border) !important;
    padding: 0 !important;
    min-width: 240px !important;
}
.sidebar-header {
    padding: 14px 16px !important;
    border-bottom: 1px solid var(--v2-border) !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
}
.sidebar-title {
    font-size: 11.5px !important;
    font-weight: 700 !important;
    letter-spacing: 0.08em !important;
    color: var(--v2-text-muted) !important;
    text-transform: uppercase !important;
}
.sidebar-controls {
    display: flex !important;
    gap: 4px !important;
}
.btn-text-small {
    font-size: 11px !important;
    font-weight: 600 !important;
    padding: 5px 10px !important;
    color: var(--v2-text-dim) !important;
    background: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid var(--v2-border) !important;
    border-radius: 6px !important;
    cursor: pointer !important;
    transition: all 0.15s !important;
}
.btn-text-small:hover {
    color: var(--v2-text) !important;
    background: rgba(255, 255, 255, 0.1) !important;
    border-color: var(--v2-border-strong) !important;
}

/* ─── Thumbnail Grid ─── */
.thumbnail-grid {
    padding: 12px !important;
    gap: 8px !important;
}
.thumb-item {
    position: relative !important;
    border-radius: 10px !important;
    overflow: hidden !important;
    cursor: pointer !important;
    aspect-ratio: 1 !important;
    background: var(--v2-surface) !important;
    border: 2px solid transparent !important;
    transition: all 0.18s cubic-bezier(0.4, 0.0, 0.2, 1) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25) !important;
}
.thumb-item:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4) !important;
    border-color: rgba(107, 141, 255, 0.35) !important;
}
.thumb-item.active {
    border-color: var(--v2-accent) !important;
    box-shadow: 0 0 0 3px var(--v2-accent-glow), 0 8px 24px rgba(0, 0, 0, 0.5) !important;
    transform: translateY(-1px) !important;
}
.thumb-item.selected::before {
    content: "" !important;
    position: absolute !important;
    inset: 0 !important;
    border: 3px solid var(--v2-success) !important;
    border-radius: 10px !important;
    z-index: 2 !important;
    pointer-events: none !important;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.3), 0 0 18px var(--v2-success-glow) !important;
}
.thumb-item.selected::after {
    content: "✓" !important;
    position: absolute !important;
    top: 6px !important;
    right: 6px !important;
    width: 22px !important;
    height: 22px !important;
    background: var(--v2-success) !important;
    color: #fff !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 13px !important;
    font-weight: 900 !important;
    z-index: 3 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4) !important;
}
.thumb-item img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
    display: block !important;
    transition: transform 0.3s !important;
}
.thumb-item:hover img {
    transform: scale(1.05) !important;
}
.thumb-item.loading img {
    opacity: 0.3 !important;
}
.thumb-number {
    position: absolute !important;
    left: 6px !important;
    bottom: 6px !important;
    background: rgba(0, 0, 0, 0.75) !important;
    backdrop-filter: blur(10px) !important;
    color: #fff !important;
    font-size: 10.5px !important;
    font-weight: 700 !important;
    padding: 2px 7px !important;
    border-radius: 4px !important;
    z-index: 2 !important;
    font-variant-numeric: tabular-nums !important;
}

/* ─── Preview Area ─── */
.preview-area {
    background: transparent !important;
    padding: 20px 20px 0 !important;
}
.preview-container {
    background: #050811 !important;
    border-radius: 12px !important;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5) !important;
    border: 1px solid var(--v2-border) !important;
}
.preview-image {
    border-radius: 10px !important;
}

/* 미리보기 하단 정보 + 코멘트 */
.preview-footer {
    margin-top: 14px !important;
    padding: 12px 16px 16px !important;
    background: var(--v2-bg-base) !important;
    border: 1px solid var(--v2-border) !important;
    border-radius: 12px !important;
}
.photo-info {
    display: flex !important;
    justify-content: space-between !important;
    align-items: baseline !important;
    margin-bottom: 10px !important;
}
.photo-filename {
    font-family: 'SF Mono', 'Menlo', monospace !important;
    font-size: 12.5px !important;
    font-weight: 600 !important;
    color: var(--v2-text) !important;
    letter-spacing: 0 !important;
}
.photo-index {
    font-size: 11.5px !important;
    color: var(--v2-text-muted) !important;
    font-variant-numeric: tabular-nums !important;
}
.comment-input {
    width: 100% !important;
    background: var(--v2-surface) !important;
    border: 1px solid var(--v2-border) !important;
    border-radius: 8px !important;
    padding: 10px 12px !important;
    color: var(--v2-text) !important;
    font-size: 13px !important;
    resize: vertical !important;
    min-height: 44px !important;
    transition: border-color 0.15s !important;
}
.comment-input:focus {
    outline: none !important;
    border-color: var(--v2-accent) !important;
    box-shadow: 0 0 0 3px var(--v2-accent-glow) !important;
}
.comment-input::placeholder {
    color: var(--v2-text-muted) !important;
}

/* ─── Bottom Bar — 플로팅 필(Pill) 스타일 ─── */
.bottom-bar {
    background: var(--v2-bg-glass) !important;
    backdrop-filter: blur(24px) saturate(1.6) !important;
    -webkit-backdrop-filter: blur(24px) saturate(1.6) !important;
    border-top: 1px solid var(--v2-border) !important;
    padding: 12px 20px !important;
    height: auto !important;
    min-height: 64px !important;
}
.btn-nav {
    width: 40px !important;
    height: 40px !important;
    border-radius: 50% !important;
    background: var(--v2-surface) !important;
    border: 1px solid var(--v2-border) !important;
    color: var(--v2-text) !important;
    transition: all 0.15s !important;
}
.btn-nav:hover {
    background: var(--v2-surface-hover) !important;
    border-color: var(--v2-accent) !important;
    transform: scale(1.06) !important;
}
.btn-nav:active { transform: scale(0.95) !important; }

.btn-tool {
    padding: 9px 14px !important;
    background: var(--v2-surface) !important;
    border: 1px solid var(--v2-border) !important;
    border-radius: 10px !important;
    color: var(--v2-text-dim) !important;
    font-size: 13px !important;
    font-weight: 500 !important;
    transition: all 0.15s !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
}
.btn-tool:hover {
    background: var(--v2-surface-hover) !important;
    color: var(--v2-text) !important;
    border-color: var(--v2-border-strong) !important;
}
.btn-tool.active {
    background: rgba(107, 141, 255, 0.18) !important;
    color: var(--v2-accent) !important;
    border-color: var(--v2-accent) !important;
}
.btn-submit {
    padding: 10px 24px !important;
    background: linear-gradient(135deg, #30D974, #0CAB54) !important;
    color: #fff !important;
    border: none !important;
    border-radius: 10px !important;
    font-size: 14px !important;
    font-weight: 800 !important;
    letter-spacing: -0.01em !important;
    cursor: pointer !important;
    box-shadow: 0 4px 14px rgba(48, 217, 116, 0.35) !important;
    transition: all 0.15s !important;
}
.btn-submit:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 6px 20px rgba(48, 217, 116, 0.5) !important;
}
.btn-submit:active { transform: translateY(0) !important; }

/* ─── Modal ─── */
.modal-content {
    background: linear-gradient(160deg, #1A2040 0%, #12172A 100%) !important;
    border: 1px solid var(--v2-border-strong) !important;
    border-radius: 16px !important;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6) !important;
}
.modal-header {
    border-bottom: 1px solid var(--v2-border) !important;
    padding: 20px 24px !important;
}
.modal-header h3 {
    font-size: 18px !important;
    font-weight: 800 !important;
    letter-spacing: -0.02em !important;
}
.modal-body { padding: 22px 24px !important; }
.modal-footer {
    padding: 16px 24px !important;
    border-top: 1px solid var(--v2-border) !important;
    gap: 10px !important;
}
.summary-item {
    padding: 10px 14px !important;
    background: rgba(255, 255, 255, 0.03) !important;
    border: 1px solid var(--v2-border) !important;
    border-radius: 10px !important;
    margin-bottom: 8px !important;
    display: flex !important;
    justify-content: space-between !important;
}
.summary-label {
    font-size: 12px !important;
    color: var(--v2-text-muted) !important;
    font-weight: 600 !important;
}
.summary-value {
    font-size: 13px !important;
    font-weight: 700 !important;
    color: var(--v2-text) !important;
}

/* ─── Toast ─── */
.toast {
    background: rgba(20, 25, 45, 0.95) !important;
    backdrop-filter: blur(20px) !important;
    border: 1px solid var(--v2-border-strong) !important;
    border-radius: 12px !important;
    padding: 12px 20px !important;
    color: var(--v2-text) !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5) !important;
}

/* ─── Loading Screen 재설계 ─── */
.loading-logo {
    background: linear-gradient(135deg, #6B8DFF 0%, #A855F7 50%, #EC4899 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    letter-spacing: -0.03em !important;
}
.loading-spinner {
    border-top-color: var(--v2-accent) !important;
    border-right-color: transparent !important;
    border-bottom-color: transparent !important;
    border-left-color: transparent !important;
}

/* ─── Empty State ─── */
.empty-state {
    background: radial-gradient(ellipse at top, #151B35, #0B0E1A) !important;
}
.empty-icon {
    font-size: 64px !important;
    filter: drop-shadow(0 4px 20px var(--v2-accent-glow)) !important;
    animation: emptyFloat 3s ease-in-out infinite !important;
}
@keyframes emptyFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
.empty-content h2 {
    font-size: 28px !important;
    font-weight: 800 !important;
    letter-spacing: -0.02em !important;
    margin-top: 20px !important;
}
.btn-primary {
    background: linear-gradient(135deg, #6B8DFF, #A855F7) !important;
    border: none !important;
    font-weight: 700 !important;
    padding: 12px 24px !important;
    border-radius: 10px !important;
    box-shadow: 0 6px 20px var(--v2-accent-glow) !important;
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid var(--v2-border-strong) !important;
    font-weight: 600 !important;
}

/* ─── Mobile 최적화 ─── */
@media (max-width: 720px) {
    .header { height: 50px !important; padding: 0 14px !important; gap: 10px !important; }
    .header-logo { font-size: 13px !important; }
    .header-session, .header-client { font-size: 11px !important; }
    .header-client::before { content: ""; margin: 0; }
    .header-count { font-size: 10.5px !important; padding: 4px 10px !important; }
    .preview-area { padding: 10px 10px 0 !important; }
    .preview-footer { margin-top: 8px !important; padding: 10px !important; border-radius: 10px !important; }
    .bottom-bar { padding: 8px 12px !important; min-height: 56px !important; }
    .btn-nav { width: 36px !important; height: 36px !important; }
    .btn-tool { padding: 7px 10px !important; font-size: 12px !important; }
    .btn-submit { padding: 8px 16px !important; font-size: 13px !important; }
    .sidebar { display: none !important; }
}

/* ─── Scrollbar 세련되게 ─── */
::-webkit-scrollbar { width: 8px !important; height: 8px !important; }
::-webkit-scrollbar-track { background: transparent !important; }
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1) !important;
    border-radius: 4px !important;
    transition: background 0.15s !important;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2) !important; }

/* 썸네일 그리드 자동 스크롤 부드럽게 */
.thumbnail-grid {
    scroll-behavior: smooth !important;
}

/* ═══════════════════════════════════════════════
   썸네일 그리드 — 세로/가로 1:1 강제 + 패딩 정돈
═══════════════════════════════════════════════ */
.thumbnail-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)) !important;
    gap: 12px !important;
    padding: 14px !important;
    align-content: start !important;
}
.thumb-item {
    position: relative !important;
    width: 100% !important;
    padding-bottom: 100% !important;  /* 1:1 정사각형 강제 */
    height: 0 !important;
    overflow: hidden !important;
    border-radius: 10px !important;
    cursor: pointer !important;
    background: #1A1F35 !important;
    border: 2px solid rgba(255, 255, 255, 0.06) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3) !important;
    transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1) !important;
    aspect-ratio: auto !important;  /* padding-bottom 우선 */
}
.thumb-item img {
    position: absolute !important;
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
    display: block !important;
    transition: transform 0.3s !important;
}
.thumb-item:hover {
    transform: translateY(-3px) !important;
    border-color: rgba(107, 141, 255, 0.45) !important;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5) !important;
}
.thumb-item.active {
    border-color: var(--v2-accent, #6B8DFF) !important;
    box-shadow: 0 0 0 3px rgba(107, 141, 255, 0.35), 0 10px 24px rgba(0, 0, 0, 0.6) !important;
}

/* 번호 배지 — 좌상단 고정, 배경 강화로 이미지 위에서도 보임 */
.thumb-number {
    position: absolute !important;
    top: 6px !important;
    left: 6px !important;
    bottom: auto !important;
    right: auto !important;
    background: rgba(0, 0, 0, 0.82) !important;
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
    color: #fff !important;
    font-size: 10.5px !important;
    font-weight: 800 !important;
    padding: 3px 8px !important;
    border-radius: 6px !important;
    min-width: 22px !important;
    text-align: center !important;
    z-index: 5 !important;
    font-variant-numeric: tabular-nums !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5) !important;
    line-height: 1 !important;
}

/* 선택 체크 배지 — 우상단 (번호랑 안 겹치게) */
.thumb-item.selected::after {
    content: "✓" !important;
    position: absolute !important;
    top: 6px !important;
    right: 6px !important;
    width: 22px !important;
    height: 22px !important;
    background: #30D974 !important;
    color: #fff !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 13px !important;
    font-weight: 900 !important;
    z-index: 5 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5) !important;
}
.thumb-item.selected::before {
    content: "" !important;
    position: absolute !important;
    inset: 0 !important;
    border: 3px solid #30D974 !important;
    border-radius: 10px !important;
    z-index: 2 !important;
    pointer-events: none !important;
    box-shadow: 0 0 18px rgba(48, 217, 116, 0.45) !important;
}

/* 모바일 — 3열 */
@media (max-width: 720px) {
    .thumbnail-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 8px !important;
        padding: 10px !important;
    }
    .thumb-number {
        font-size: 9.5px !important;
        padding: 2px 6px !important;
        min-width: 18px !important;
    }
    .thumb-item.selected::after {
        width: 18px !important;
        height: 18px !important;
        font-size: 11px !important;
    }
}

/* ==================== v8.6 셀렉 완료 다이얼로그 헤더 ==================== */

.selected-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    margin: 8px 0 4px;
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.12), rgba(255, 193, 7, 0.04));
    border: 1px solid rgba(255, 193, 7, 0.3);
    border-radius: 8px;
}
.selected-list-title {
    font-size: 13px;
    font-weight: 700;
    color: #FFC107;
    letter-spacing: 0.3px;
}
.selected-list-count {
    font-size: 12px;
    font-weight: 600;
    color: rgba(255, 193, 7, 0.85);
    background: rgba(255, 193, 7, 0.15);
    padding: 3px 8px;
    border-radius: 99px;
}

/* 코멘트/펜 비활성 상태 */
.comment-input.disabled,
.comment-input:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    background: rgba(0, 0, 0, 0.3);
}
.comment-input:disabled::placeholder {
    color: rgba(255, 255, 255, 0.4);
    font-style: italic;
}

#btn-pen.disabled,
#btn-pen:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}