/* ============================================================
   云电脑开账号 · 管理后台样式（独立于前台样式）
   黑白极简主题：白色模式 / 黑色模式（按钮在右上角）
   ============================================================ */

:root {
    --bg: #f2f2f2;
    --card: #ffffff;
    --border: #e0e0e0;
    --border-soft: #ebebeb;
    --hover-bg: rgba(0, 0, 0, 0.05);
    --text: #1a1a1a;
    --text-2: #4d4d4d;
    --text-3: #8a8a8a;
    --accent: #111111;
    --accent-hover: #000000;
    --accent-soft: #ececec;
    --danger: #b3261e;
    --danger-soft: #f6e3e1;
    --success: #1e7b4d;
    --success-soft: #e2f0e9;
    --warning: #8a6d1a;
    --warning-soft: #f4ecd6;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
    --bg: #0d0d0d;
    --card: #1a1a1a;
    --border: #2e2e2e;
    --border-soft: #262626;
    --hover-bg: rgba(255, 255, 255, 0.07);
    --text: #f0f0f0;
    --text-2: #b5b5b5;
    --text-3: #7a7a7a;
    --accent: #eaeaea;
    --accent-hover: #ffffff;
    --accent-soft: #2a2a2a;
    --danger: #f2706b;
    --danger-soft: #3a2322;
    --success: #6fd39a;
    --success-soft: #1e3328;
    --warning: #d9b45f;
    --warning-soft: #37301c;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
::selection { background: var(--accent-soft); color: var(--text); }
html { -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background .2s var(--ease), color .2s var(--ease);
}

/* ---------------- 登录页 ---------------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 36px 30px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, .10);
}
.login-card h1 { font-size: 19px; text-align: center; margin-bottom: 6px; font-weight: 600; }
.login-card .sub { text-align: center; color: var(--text-2); font-size: 13px; margin-bottom: 24px; }

/* ---------------- 顶部栏 ---------------- */
.header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    color: var(--text);
    padding: 14px 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header h1 { font-size: 16px; font-weight: 600; display: flex; align-items: center; gap: 9px; }
.header h1 .logo-dot {
    width: 26px; height: 26px;
    border-radius: 8px;
    background: var(--accent-soft);
    color: var(--text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.header .nav { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.header a {
    color: var(--text-2);
    font-size: 13px;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 7px;
    transition: background .2s, color .2s;
}
.header a:hover { color: var(--text); background: var(--bg); }

/* ---------------- 主题切换按钮 ---------------- */
.theme-toggle {
    position: fixed;
    right: 14px;
    bottom: 42px;
    z-index: 900;
    width: 32px; height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text-2);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background .2s, color .2s, border-color .2s;
}
.theme-toggle:hover { background: var(--hover-bg); color: var(--text); }

/* ---------------- 布局 ---------------- */
.wrap { max-width: 760px; margin: 0 auto; padding: 22px 16px 50px; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px 22px;
    margin-bottom: 16px;
    transition: background .2s var(--ease), border-color .2s var(--ease);
}
.card h2 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
}
.card h2::before {
    content: '';
    width: 3px;
    height: 14px;
    background: var(--accent);
    border-radius: 2px;
    flex-shrink: 0;
}

/* ---------------- 表单 ---------------- */
.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }
.field label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.field input,
.field textarea {
    width: 100%;
    padding: 10px 13px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 16px;              /* 手机端聚焦不自动放大 */
    font-family: inherit;
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
    background: var(--card);
    color: var(--text);
    appearance: none;
    -webkit-appearance: none;
}
.field textarea { min-height: 74px; resize: vertical; line-height: 1.6; }
.field input:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--hover-bg);
}
.field input::placeholder,
.field textarea::placeholder { color: var(--text-3); }
.field .hint { font-size: 11.5px; color: var(--text-3); margin-top: 5px; line-height: 1.6; }
.field code {
    background: var(--bg);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 11px;
    word-break: break-all;
}
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* ---------------- 按钮 ---------------- */
.btn {
    padding: 10px 20px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), transform .12s var(--ease);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
    appearance: none;
    -webkit-appearance: none;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost { background: var(--card); color: var(--text-2); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg); color: var(--text); }
.btn:focus-visible,
.header a:focus-visible,
.theme-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
.btn-sm { padding: 7px 14px; font-size: 12.5px; }
.btn-block { width: 100%; }

/* ---------------- 提示 ---------------- */
.alert {
    padding: 11px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
    line-height: 1.7;
    word-break: break-word;
    border: 1px solid transparent;
}
.alert.success { background: var(--success-soft); color: var(--success); border-color: var(--border); }
.alert.error   { background: var(--danger-soft); color: var(--danger); border-color: var(--border); }
.alert.info    { background: var(--accent-soft); color: var(--accent); border-color: var(--border); }
.alert.warn    { background: var(--warning-soft); color: var(--warning); border-color: var(--border); }

/* ---------------- 状态指示 ---------------- */
.status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    padding: 11px 14px;
    border-radius: 8px;
    background: var(--bg);
    margin-bottom: 6px;
    line-height: 1.6;
    flex-wrap: wrap;
    word-break: break-word;
}
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot.on  { background: var(--success); }
.dot.off { background: var(--danger); }

.tip-list { font-size: 12.5px; color: var(--text-2); line-height: 2; padding-left: 18px; }
.tip-list li { margin-bottom: 2px; }
.tip-list b { color: var(--text); }

.bg-preview {
    margin-top: 8px;
    height: 96px;
    border-radius: 8px;
    background-color: var(--bg);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    border: 1px solid var(--border);
}

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }

/* ---------------- 减少动画偏好 ---------------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
}

/* ---------------- 手机端 ---------------- */
@media (max-width: 520px) {
    .wrap { padding: 14px 12px 40px; }
    .card { padding: 16px; }
    .row2 { grid-template-columns: 1fr; gap: 0; }
    .header { padding: 12px 16px; }
    .header h1 { font-size: 15px; }
    .actions .btn { flex: 1 1 auto; }
}