:root {
    --primary: #4f6ef7;
    --primary-dark: #3b56d6;
    --bg-start: #eef2ff;
    --bg-end: #dbe3ff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
    min-height: 100vh;
    color: var(--text);
}

.page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(79, 110, 247, 0.15);
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
}

.brand {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    text-align: center;
    letter-spacing: 0.5px;
}

.subtitle {
    text-align: center;
    color: var(--muted);
    margin: 10px 0 28px;
    font-size: 14px;
}

.alert {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 18px;
    font-size: 14px;
}

.alert p + p { margin-top: 4px; }

.field { margin-bottom: 18px; }

.field label {
    display: block;
    font-size: 14px;
    margin-bottom: 6px;
    color: #374151;
}

.field input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.15);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 11px 16px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 15px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    letter-spacing: 6px;
    text-indent: 6px;
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-outline {
    background: #fff;
    color: var(--primary);
    border-color: var(--primary);
    margin-bottom: 12px;
}

.btn-outline:hover { background: #f3f6ff; }

.welcome-card { max-width: 460px; }

.info {
    list-style: none;
    margin-bottom: 24px;
    font-size: 14px;
}

.info li {
    padding: 10px 0;
    border-bottom: 1px dashed var(--border);
    color: #374151;
}

.info li:last-child { border-bottom: none; }

.actions { display: flex; flex-direction: column; gap: 0; }