/* ============================================================
   图片批量灰度转换 — 极简纸感风格（墨水屏主题：白底纯黑）
   ============================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ink: #111111;
    --ink-soft: #555555;
    --ink-faint: #999999;
    --paper: #fafaf8;
    --card: #ffffff;
    --line: #e4e2dd;
    --line-strong: #111111;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
        'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--paper);
    color: var(--ink);
    min-height: 100vh;
    padding: 28px 20px 110px;
    line-height: 1.5;
}

.wrap {
    max-width: 760px;
    margin: 0 auto;
}

/* ---------- 头部 ---------- */
header {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--line-strong);
}

header h1 {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

header .sub {
    font-size: 13px;
    color: var(--ink-soft);
}

/* ---------- 上传区 ---------- */
.drop-zone {
    background: var(--card);
    border: 2px dashed #c9c6bf;
    border-radius: 14px;
    padding: 36px 20px;
    text-align: center;
    color: var(--ink-soft);
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
    outline: none;
    margin-bottom: 20px;
}

.drop-zone:hover,
.drop-zone:focus-visible,
.drop-zone.dragover {
    border-color: var(--line-strong);
    background: #f4f3ef;
    color: var(--ink);
}

.drop-zone.dragover {
    border-style: solid;
}

.drop-icon {
    display: block;
    margin: 0 auto 10px;
    color: currentColor;
}

.drop-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
}

.drop-hint {
    font-size: 12px;
    margin-top: 4px;
}

/* ---------- 参数区 ---------- */
.params {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 8px 18px;
    margin-bottom: 20px;
}

.param-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 11px 0;
}

.param-row + .param-row {
    border-top: 1px solid var(--line);
}

.param-label {
    flex: 0 0 88px;
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
}

.param-label .val {
    color: var(--ink-faint);
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

.param-controls {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.num-input {
    width: 82px;
    padding: 7px 10px;
    font-size: 14px;
    font-family: inherit;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    font-variant-numeric: tabular-nums;
}

.num-input:focus {
    outline: none;
    border-color: var(--ink);
}

.times {
    color: var(--ink-faint);
}

.unit {
    font-size: 12px;
    color: var(--ink-faint);
}

select {
    padding: 7px 10px;
    font-size: 14px;
    font-family: inherit;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    cursor: pointer;
    max-width: 100%;
}

select:focus {
    outline: none;
    border-color: var(--ink);
}

/* 分段选择器 */
.seg {
    display: inline-flex;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
}

.seg button {
    padding: 7px 16px;
    font-size: 13px;
    font-family: inherit;
    background: #fff;
    color: var(--ink-soft);
    border: none;
    cursor: pointer;
    transition: background 0.12s ease, color 0.12s ease;
}

.seg button + button {
    border-left: 1px solid var(--line);
}

.seg button:hover {
    background: #f4f3ef;
}

.seg button.active {
    background: var(--ink);
    color: #fff;
    font-weight: 600;
}

/* 滑块 */
input[type="range"] {
    flex: 1;
    max-width: 300px;
    accent-color: var(--ink);
    cursor: pointer;
}

/* 复选框 */
.check-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ink-soft);
    cursor: pointer;
}

.check-label input {
    width: 16px;
    height: 16px;
    accent-color: var(--ink);
    cursor: pointer;
}

.conditional.hidden {
    display: none;
}

/* ---------- 图片列表 ---------- */
.image-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.image-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 12px 14px;
}

.thumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.thumb-box {
    width: 92px;
    height: 92px;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.thumb-box canvas {
    max-width: 100%;
    max-height: 100%;
    image-rendering: pixelated;
}

.arrow {
    color: var(--ink-faint);
    font-size: 16px;
    flex-shrink: 0;
}

.meta {
    flex: 1;
    min-width: 0;
}

.meta .name {
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.meta .dim {
    font-size: 12px;
    color: var(--ink-faint);
    margin-top: 3px;
    font-variant-numeric: tabular-nums;
}

.ops {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.btn-mini {
    padding: 5px 14px;
    font-size: 12px;
    font-family: inherit;
    border-radius: 7px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    cursor: pointer;
    transition: background 0.12s ease, border-color 0.12s ease;
}

.btn-mini:hover {
    border-color: var(--ink);
}

.btn-mini.btn-mini-del:hover {
    background: #111;
    color: #fff;
    border-color: #111;
}

.empty-tip {
    text-align: center;
    color: var(--ink-faint);
    font-size: 13px;
    padding: 30px 0 10px;
}

/* ---------- 吸底操作栏 ---------- */
.action-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--line);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    z-index: 10;
}

.action-bar-inner,
.action-buttons {
    display: flex;
    align-items: center;
    gap: 10px;
}

.count-info {
    font-size: 13px;
    color: var(--ink-soft);
    font-variant-numeric: tabular-nums;
}

.btn-ghost {
    padding: 10px 18px;
    font-size: 13px;
    font-family: inherit;
    border-radius: 9px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    cursor: pointer;
    transition: border-color 0.12s ease;
}

.btn-ghost:hover {
    border-color: var(--ink);
}

.btn-primary {
    padding: 10px 22px;
    font-size: 13px;
    font-weight: 700;
    font-family: inherit;
    border-radius: 9px;
    border: 1px solid var(--ink);
    background: var(--ink);
    color: #fff;
    cursor: pointer;
    transition: opacity 0.12s ease;
}

.btn-primary:hover {
    opacity: 0.85;
}

.btn-primary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ---------- 单图微调弹层 ---------- */
.adjust-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.62);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 100;
}

.adjust-overlay.hidden {
    display: none;
}

.adjust-panel {
    background: var(--card);
    border-radius: 16px;
    padding: 18px 20px 14px;
    width: min(680px, 100%);
    max-height: calc(100vh - 40px);
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.35);
}

.adjust-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.adjust-title {
    font-size: 15px;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.adjust-canvas-wrap {
    background: #2b2b2b;
    border-radius: 10px;
    padding: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

#adjustCanvas {
    max-width: 100%;
    max-height: 56vh;
    image-rendering: pixelated;
    touch-action: none;
    cursor: grab;
}

#adjustCanvas.dragging {
    cursor: grabbing;
}

.adjust-controls {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.adjust-slider {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 220px;
}

.adjust-label {
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}

.adjust-val,
.adjust-pos {
    font-size: 12px;
    color: var(--ink-soft);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.adjust-pos {
    min-width: 96px;
}

.adjust-hint {
    font-size: 12px;
    color: var(--ink-faint);
    text-align: center;
}

/* 卡片「已微调」角标 */
.badge-adjusted {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    background: var(--ink);
    border-radius: 5px;
    padding: 1px 7px;
    margin-left: 6px;
    vertical-align: 1px;
}

.badge-adjusted.hidden {
    display: none;
}

/* ---------- 移动端 ---------- */
@media (max-width: 560px) {
    body {
        padding: 18px 12px 104px;
    }

    header h1 {
        font-size: 21px;
    }

    .param-row {
        flex-wrap: wrap;
        gap: 8px;
    }

    .param-label {
        flex-basis: 100%;
    }

    .image-card {
        flex-wrap: wrap;
    }

    .meta {
        flex-basis: calc(100% - 208px);
    }

    .action-bar {
        padding: 12px 14px;
    }

    .count-info {
        font-size: 12px;
    }
}