/* ============================================================
   tools.css — 在线工具台的样式
   复用 style.css 里已有的设计令牌（颜色 / 间距 / 圆角 / 玻璃 / 缓动），
   不引入新的色值与时间常量，保证和站点其余部分观感一致。
   ============================================================ */

/* ---------- 工具卡片网格 ---------- */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: var(--space-md);
    width: 100%;
}

.tool-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: var(--space-md);
    text-align: left;
    cursor: pointer;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    color: var(--color-text-primary);
    transition: transform .25s var(--ease-smooth),
                box-shadow .25s var(--ease-smooth),
                border-color .25s var(--ease-smooth),
                background-color .25s var(--ease-smooth);
}
.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-border-accent);
}
.tool-card:active { transform: translateY(-1px); }

.tool-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--accent-grad-soft);
    color: var(--accent-color);
    font-size: 1.1rem;
}
.tool-card-name {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: .02em;
}
.tool-card-desc {
    font-size: .82rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}
.tool-card-tag {
    font-family: var(--font-mono);
    font-size: .68rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    opacity: .8;
}

/* ---------- 工具面板 ---------- */
.tool-panel {
    width: 100%;
    padding: var(--space-lg);
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    animation: fadePage .35s var(--ease-out-expo);
}

.tool-panel-head {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border-subtle);
    flex-wrap: wrap;
}
.tool-panel-meta { display: flex; flex-direction: column; gap: 2px; }
.tool-panel-title {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: .03em;
    color: var(--color-text-primary);
}
.tool-panel-desc { font-size: .82rem; color: var(--color-text-muted); }

.tool-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    font-size: .84rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border-subtle);
    border-radius: 999px;
    transition: background-color .2s var(--ease-smooth),
                color .2s var(--ease-smooth),
                border-color .2s var(--ease-smooth);
}
.tool-back:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
    border-color: var(--color-border-accent);
}

.tool-body { display: flex; flex-direction: column; gap: var(--space-md); }

/* ---------- 表单元素 ---------- */
.t-field { display: flex; flex-direction: column; gap: 6px; }
.t-label {
    font-size: .8rem;
    font-weight: 500;
    letter-spacing: .04em;
    color: var(--color-text-secondary);
}
.t-input,
.t-output,
.t-select {
    width: 100%;
    padding: 10px 12px;
    font-size: .88rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-sm);
    transition: border-color .2s var(--ease-smooth), box-shadow .2s var(--ease-smooth);
}
.t-input:focus,
.t-select:focus,
.t-output:focus {
    outline: none;
    border-color: var(--color-border-accent);
    box-shadow: 0 0 0 3px var(--accent-grad-soft);
}
.t-input:focus-visible,
.t-select:focus-visible,
.t-output:focus-visible { outline: 2px solid var(--color-border-accent); outline-offset: 1px; }
.t-input::placeholder { color: var(--color-text-muted); }
.t-mono { font-family: var(--font-mono); font-size: .84rem; }
.t-output {
    background: var(--color-bg-elevated);
    resize: vertical;
}
.t-input { resize: vertical; }

/* ---------- 按钮 ---------- */
.t-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

.t-btn {
    padding: 9px 16px;
    font-size: .84rem;
    cursor: pointer;
    color: var(--color-text-primary);
    background: var(--color-bg-hover);
    border: 1px solid var(--color-border-subtle);
    border-radius: 999px;
    transition: transform .18s var(--ease-smooth),
                background-color .18s var(--ease-smooth),
                border-color .18s var(--ease-smooth),
                color .18s var(--ease-smooth);
}
.t-btn:hover {
    border-color: var(--color-border-accent);
    background: var(--color-bg-surface);
}
.t-btn:active { transform: scale(.97); }

.t-btn.primary {
    color: #fff;
    background: var(--accent-grad);
    border-color: transparent;
    box-shadow: var(--glow-accent);
}
.t-btn.primary:hover { filter: brightness(1.06); }

.t-btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ---------- 行内布局 ---------- */
.t-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: flex-end;
}
.t-row > .t-field { flex: 1 1 140px; min-width: 120px; }

/* ---------- 结果 / 状态 ---------- */
.t-msg {
    font-size: .82rem;
    line-height: 1.7;
    color: var(--color-text-muted);
    min-height: 1.4em;
}
.t-msg.is-ok { color: #0f8a5f; }
.t-msg.is-err { color: #c0392b; }
.t-msg.is-warn { color: #b7791f; }

.t-stats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
    gap: 10px;
}
.t-stat {
    padding: 10px 12px;
    background: var(--color-bg-hover);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-sm);
}
.t-stat-num {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--accent-color);
    line-height: 1.3;
}
.t-stat-key { font-size: .72rem; letter-spacing: .04em; color: var(--color-text-muted); }

.t-swatch {
    width: 100%;
    height: 88px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border-medium);
    background-image:
        linear-gradient(45deg, rgba(0, 0, 0, .06) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(0, 0, 0, .06) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(0, 0, 0, .06) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(0, 0, 0, .06) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}
.t-swatch-fill { width: 100%; height: 100%; border-radius: var(--radius-sm); }

/* 正则匹配高亮 */
.t-hl {
    padding: 12px;
    font-family: var(--font-mono);
    font-size: .84rem;
    line-height: 1.9;
    white-space: pre-wrap;
    word-break: break-word;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-sm);
    max-height: 260px;
    overflow: auto;
}
.t-hl mark {
    padding: 1px 2px;
    border-radius: 3px;
    background: rgba(77, 107, 254, .28);
    color: inherit;
}
.t-hl mark.alt { background: rgba(124, 58, 237, .28); }

.t-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .82rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    user-select: none;
}
.t-check input { width: 15px; height: 15px; accent-color: var(--accent-color); cursor: pointer; }

.t-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 220px;
    overflow: auto;
    font-family: var(--font-mono);
    font-size: .8rem;
}
.t-list-item {
    padding: 7px 10px;
    word-break: break-all;
    background: var(--color-bg-hover);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-sm);
}

.tools-foot {
    width: 100%;
    font-size: .82rem;
    line-height: 1.9;
    text-align: center;
    color: var(--color-text-muted);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 720px) {
    .tools-grid { grid-template-columns: 1fr; gap: var(--space-sm); }
    .tool-panel { padding: var(--space-md); }
    .tool-panel-head { gap: var(--space-sm); }
    .t-row > .t-field { flex: 1 1 100%; }
    .t-btn { flex: 1 1 auto; text-align: center; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
    .tool-card,
    .tool-card:hover,
    .tool-card:active,
    .t-btn,
    .t-btn:active { transition: none; transform: none; }
    .tool-panel { animation: none; }
}
/* hidden 属性必须显式覆盖 display，否则 .tools-grid 的 display:grid 会赢过
   浏览器默认的 [hidden]{display:none}，导致切换工具时列表不隐藏。 */
.tools-grid[hidden],
.tool-panel[hidden] { display: none !important; }