:root {
    --bg: #0b0f19; /* 深靛背景 */
    --card: #131a2d; /* 卡片底色 */
    --border: #1e293b; /* 边框 */
    --text: #e2e8f0; /* 主文本 */
    --text2: #94a3b8; /* 次要文本 */
    --accent: #8b5cf6; /* 亮紫 */
    --accent2: #c084fc; /* 亮紫渐变末端 */
    --panel: #131a2d; /* nav 底色 */
    --radius: 16px;
    --shadow: 0 8px 30px rgba(139, 92, 246, .15);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    padding: 2rem 1rem;
    background-image: radial-gradient(circle at 10% 20%, rgba(139, 92, 246, .06) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(192, 132, 252, .04) 0%, transparent 40%);
}

.wrapper {
    width: 100%;
    max-width: 960px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    box-shadow: var(--shadow);
}

h1 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

section {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: .875rem;
    margin: .75rem 0 .25rem;
    color: var(--text2);
}

input[type=text], input[type=file], textarea {
    width: 100%;
    padding: .75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #0b0f19;
    color: var(--text);
    transition: border .2s;
}

input[type=text]:focus, textarea:focus {
    border-color: var(--accent);
    outline: none;
}

button {
    width: 100%;
    margin-top: 1rem;
    padding: .85rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    color: #fff;
    font-weight: 600;
    font-size: .95rem;
    cursor: pointer;
    transition: opacity .2s;
}

button:hover {
    opacity: .9;
}

button:disabled {
    background: #334155;
    cursor: not-allowed;
    opacity: 1;
}

#log {
    height: 160px;
    overflow-y: auto;
    background: #0b0f19;
    padding: .75rem;
    border-radius: 8px;
    font-size: .8125rem;
    font-family: "SF Mono", Consolas, monospace;
    line-height: 1.5;
    border: 1px solid var(--border);
    margin-top: .5rem;
}

table {
    width: 100%;
    font-size: .8125rem;
    margin-top: .5rem;
    border-collapse: collapse;
}

th, td {
    padding: .5rem .5rem;
    text-align: left;
}

thead {
    border-bottom: 1px solid var(--border);
}

.spin {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(139, 92, 246, .3);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
select {
    background: #0b0f19;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
}
input[type=number] {
    background: #0b0f19;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}