* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #ffffff;
    --fg: #18181b;
    --muted: #9a9aa2;
    --line: #ececef;
    --line-strong: #d7d7dc;
    --field: #f6f6f7;
    --accent: #18181b;
    --accent-fg: #ffffff;
    --radius: 14px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0e0e10;
        --fg: #f1f1f3;
        --muted: #7c7c84;
        --line: #232327;
        --line-strong: #34343a;
        --field: #1a1a1d;
        --accent: #f1f1f3;
        --accent-fg: #0e0e10;
    }
}

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 540px;
}

/* ── 首屏：标题 + 一个框 ── */
.header {
    text-align: center;
    margin-bottom: 28px;
}

.title {
    font-size: 2.6rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--fg);
}

.subtitle {
    margin-top: 8px;
    font-size: 0.95rem;
    color: var(--muted);
    font-weight: 400;
}

.search {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--field);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 4px 4px 4px 18px;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.search:focus-within {
    border-color: var(--line-strong);
    box-shadow: 0 0 0 4px rgba(120, 120, 130, 0.10);
}

.search-icon {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1;
    margin-right: 10px;
    flex-shrink: 0;
}

#keyword-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: var(--fg);
    font-size: 1.1rem;
    font-family: inherit;
    padding: 14px 4px;
    min-width: 0;
}

#keyword-input::placeholder {
    color: var(--muted);
}

.search-btn {
    flex-shrink: 0;
    border: none;
    cursor: pointer;
    background: var(--accent);
    color: var(--accent-fg);
    width: 44px;
    height: 44px;
    border-radius: 10px;
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.18s ease, transform 0.06s ease;
}

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

.search-btn:active {
    transform: scale(0.96);
}

.hint {
    margin-top: 12px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--muted);
}

.hint kbd {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.78rem;
    background: var(--field);
    border: 1px solid var(--line);
    border-radius: 5px;
    padding: 1px 6px;
}

/* ── 高级选项：默认收起 ── */
.advanced {
    margin-top: 20px;
    border-top: 1px solid var(--line);
    padding-top: 4px;
}

.advanced > summary {
    list-style: none;
    cursor: pointer;
    user-select: none;
    color: var(--muted);
    font-size: 0.85rem;
    text-align: center;
    padding: 12px 0;
    transition: color 0.18s ease;
}

.advanced > summary:hover {
    color: var(--fg);
}

.advanced > summary::-webkit-details-marker {
    display: none;
}

.advanced[open] > summary {
    color: var(--fg);
}

.advanced-body {
    padding: 6px 2px 4px;
    animation: fade 0.2s ease;
}

@keyframes fade {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.field-row {
    margin-bottom: 20px;
}

.field-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--muted);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}

#platform-input {
    width: 100%;
    background: var(--field);
    border: 1px solid var(--line);
    border-radius: 10px;
    color: var(--fg);
    font-size: 0.95rem;
    font-family: inherit;
    padding: 11px 14px;
    outline: none;
    transition: border-color 0.18s ease;
}

#platform-input:focus {
    border-color: var(--line-strong);
}

#platform-input::placeholder {
    color: var(--muted);
}

/* 打开方式：分段控件 */
.segmented {
    display: inline-flex;
    background: var(--field);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 3px;
    gap: 2px;
}

.segmented label {
    position: relative;
    cursor: pointer;
}

.segmented input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.segmented span {
    display: block;
    font-size: 0.85rem;
    color: var(--muted);
    padding: 6px 16px;
    border-radius: 7px;
    transition: all 0.15s ease;
}

.segmented input[type="radio"]:checked + span {
    background: var(--bg);
    color: var(--fg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.mode-hint {
    font-size: 0.76rem;
    color: var(--muted);
    margin-top: 8px;
    line-height: 1.5;
}

/* 常用平台标签 */
.platform-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.platform-tag {
    background: var(--field);
    color: var(--fg);
    border: 1px solid var(--line);
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-family: inherit;
    cursor: grab;
    user-select: none;
    touch-action: none;
    -webkit-user-drag: none;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.platform-tag:hover {
    border-color: var(--line-strong);
}

.platform-tag.active {
    background: var(--accent);
    color: var(--accent-fg);
    border-color: var(--accent);
}

.platform-tag.dragging {
    opacity: 0.4;
    cursor: grabbing;
}

.platform-tag.drag-over {
    border-color: var(--line-strong);
    transform: scale(1.04);
}

.reset-row {
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 6px;
}

.text-btn {
    background: transparent;
    border: none;
    color: var(--muted);
    font-size: 0.78rem;
    font-family: inherit;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.text-btn:hover {
    color: var(--fg);
}

.alias-info {
    font-size: 0.76rem;
    color: var(--muted);
}

.help-details {
    font-size: 0.8rem;
    color: var(--muted);
}

.help-details summary {
    cursor: pointer;
    user-select: none;
    color: var(--muted);
    font-size: 0.78rem;
}

.help-details summary:hover {
    color: var(--fg);
}

.help-details-content {
    margin-top: 8px;
    line-height: 1.7;
}

/* 消息提示 */
.message {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 500;
    color: #fff;
    z-index: 1000;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.16);
}

.message.success { background-color: #2e2e32; }
.message.error   { background-color: #d93636; }
.message.warning { background-color: #c77b1a; }

.version-watermark {
    position: fixed;
    right: 14px;
    bottom: 10px;
    font-size: 0.72rem;
    color: var(--muted);
    opacity: 0.6;
    user-select: none;
    pointer-events: none;
}

@media (max-width: 480px) {
    .title { font-size: 2.1rem; }
}