/* upload-zone.css — 共享文件上传区域样式
 * 统一拖拽 / 粘贴 / 点击三合一交互风格。
 * 使用方：img.html（多图）、create_devlog.html（单文件首版）、topic.html（发版单文件）。
 * 全部使用 style.css 的 CSS 变量（--border-color / --bg-* / --primary-soft-* / --text-*）。 */

/* ---- Base zone ---- */
.upload-zone {
    border: 1px dashed var(--border-color);
    background: var(--bg-tertiary);
    border-radius: 14px;
    padding: 28px 24px;
    text-align: center;
    cursor: pointer;
    user-select: none;
    transition: background-color .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.upload-zone:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-soft-border);
}
.upload-zone.dragover {
    background: var(--primary-soft-bg);
    border-color: var(--primary-soft-border);
    box-shadow: 0 0 0 3px var(--primary-soft-shadow);
}

/* ---- Zone inner elements ---- */
.upload-zone-icon {
    margin: 0 auto 10px;
    width: 44px; height: 44px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 999px;
    background: var(--primary-soft-bg);
    color: var(--primary-soft-text);
    border: 1px solid var(--primary-soft-border);
}
.upload-zone-icon svg { width: 22px; height: 22px; }
.upload-zone-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}
.upload-zone-sub {
    margin-top: 4px;
    font-size: 13px;
    color: var(--text-muted);
}
.upload-zone-actions {
    margin-top: 14px;
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---- Idle group (icon + title + sub) — 选中文件后隐藏 ---- */
.upload-zone.has-file .upload-zone-idle { display: none; }

/* ---- Single-file selected state ---- */
.upload-zone-file {
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
}
.upload-zone-file[hidden] { display: none; }
.upload-zone-file-icon {
    flex: none;
    width: 36px; height: 36px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 8px;
    background: var(--primary-soft-bg);
    color: var(--primary-soft-text);
    border: 1px solid var(--primary-soft-border);
}
.upload-zone-file-icon svg { width: 18px; height: 18px; }
.upload-zone-file-info {
    flex: 1;
    min-width: 0;
}
.upload-zone-file-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.upload-zone-file-size {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 1px;
}
.upload-zone-file-remove {
    flex: none;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 4px 10px;
    cursor: pointer;
    transition: color .15s, background .15s, border-color .15s;
}
.upload-zone-file-remove:hover {
    color: #ef4444;
    background: #fef2f2;
    border-color: #fecaca;
}
html[data-theme="dark"] .upload-zone-file-remove:hover {
    color: #f87171;
    background: #2d1b1b;
    border-color: #5c2020;
}

/* ---- Compact variant (for inline forms) ---- */
.upload-zone--compact {
    padding: 18px 16px;
    border-radius: 10px;
}
.upload-zone--compact .upload-zone-icon {
    width: 36px; height: 36px;
}
.upload-zone--compact .upload-zone-icon svg { width: 18px; height: 18px; }
.upload-zone--compact .upload-zone-title { font-size: 14px; }
.upload-zone--compact .upload-zone-sub { font-size: 12px; }