/**
 * 云笺·故事工坊 — 共享 CSS 工具类
 * 高频内联样式提取为语义化 class，减少 app.js 中的嵌入式 style
 */

/* ── 通用卡片样式 ── */
.cu-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    padding: 20px;
    box-shadow: var(--glass-shadow);
}
.cu-card-sm { padding: 14px; }
.cu-card-lg { padding: 28px 24px; border-radius: 16px; }

/* ── 全局毛玻璃工具类 ── */
.glass {
    background: var(--glass-bg) !important;
    backdrop-filter: var(--glass-blur) !important;
    -webkit-backdrop-filter: var(--glass-blur) !important;
    border: 1px solid var(--glass-border) !important;
    box-shadow: var(--glass-shadow) !important;
}

/* ── 通用面板标题行 ── */
.cu-panel-hd {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 14px;
}
.cu-panel-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
}

/* ── Flex 布局快捷方式 ── */
.cu-flex { display: flex; }
.cu-flex-col { display: flex; flex-direction: column; }
.cu-flex-center { display: flex; align-items: center; justify-content: center; }
.cu-flex-between { display: flex; align-items: center; justify-content: space-between; }
.cu-flex-wrap { flex-wrap: wrap; }
.cu-gap-xs { gap: 6px; }
.cu-gap-sm { gap: 10px; }
.cu-gap-md { gap: 16px; }
.cu-gap-lg { gap: 20px; }

/* ── 文字样式 ── */
.cu-text-primary { color: var(--text-primary); }
.cu-text-secondary { color: var(--text-secondary); }
.cu-text-tertiary { color: var(--text-tertiary); }
.cu-text-xs { font-size: .68rem; }
.cu-text-sm { font-size: .78rem; }
.cu-text-base { font-size: .85rem; }
.cu-text-lg { font-size: 1rem; }
.cu-text-xl { font-size: 1.1rem; }
.cu-text-bold { font-weight: 700; }
.cu-text-extrabold { font-weight: 800; }

/* ── 按钮样式 ── */
.cu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 12px;
    font-size: .85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .2s;
    font-family: inherit;
}
.cu-btn-primary {
    background: linear-gradient(135deg, #1eb8a8, #34d3c4);
    color: #fff;
}
.cu-btn-success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
}
.cu-btn-small { padding: 8px 16px; font-size: .8rem; border-radius: 10px; }

/* ── 图标盒子 ── */
.cu-icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.cu-icon-sm { width: 32px; height: 32px; border-radius: 10px; font-size: .85rem; }
.cu-icon-md { width: 42px; height: 42px; border-radius: 12px; font-size: 1rem; }
.cu-icon-lg { width: 56px; height: 56px; border-radius: 14px; font-size: 1.3rem; }

/* ── 标签/徽章 ── */
.cu-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: .68rem;
    font-weight: 700;
    white-space: nowrap;
}
.cu-badge-gold {
    color: #d4a853;
    background: rgba(212, 168, 83, .12);
}
.cu-badge-crown {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: .68rem;
    font-weight: 800;
    color: #d4a853;
    background: rgba(212, 168, 83, .12);
}

/* ── 滚动容器 ── */
.cu-scroll {
    overflow-y: auto;
    max-height: 360px;
}
.cu-scroll-lg { max-height: 60vh; }

/* ── 预置渐变背景 ── */
.cu-grad-crown {
    background: linear-gradient(135deg, rgba(212,168,83,.08), rgba(240,192,96,.04));
    border: 1.5px solid rgba(212,168,83,.25);
}
.cu-grad-crown-active {
    background: linear-gradient(135deg, #d4a853, #f0c060);
    border-color: #d4a853;
}
.cu-grad-purple {
    background: linear-gradient(135deg, #1eb8a8, #34d3c4);
}

/* ── 间距工具 ── */
.cu-mt-sm { margin-top: 8px; }
.cu-mt-md { margin-top: 16px; }
.cu-mt-lg { margin-top: 24px; }
.cu-mb-sm { margin-bottom: 8px; }
.cu-mb-md { margin-bottom: 16px; }
.cu-mb-lg { margin-bottom: 24px; }

/* ── 文本对齐 ── */
.cu-text-center { text-align: center; }
.cu-text-right { text-align: right; }

/* ── 过渡动画 ── */
.cu-transition { transition: all .25s ease; }

/* ── 尺寸 ── */
.cu-w-full { width: 100%; }

/* ── 隐藏 ── */
.cu-hidden { display: none; }
.cu-visible { display: block; }

/* ── 开关组件样式 ── */
.cu-toggle-track {
    position: relative;
    width: 52px;
    height: 28px;
    border-radius: 14px;
    background: var(--section-bg);
    cursor: pointer;
    transition: all .3s;
    border: 1.5px solid var(--border-card);
}
.cu-toggle-knob {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--text-tertiary);
    transition: all .3s;
    box-shadow: 0 1px 3px rgba(0,0,0,.15);
}