/* ========================================================================
   小飞下载中心 - 样式表（Material Design 3 · 淡绿主题）
   - 圆角、柔和分层投影、淡绿主色，深浅色自适应
   ======================================================================== */

/* ---------- MD3 主题变量（淡绿） ---------- */
:root {
    --primary: #4F8B47;
    --primary-d: #3C6E36;
    --on-primary: #FFFFFF;
    --primary-container: #D6EBD0;
    --on-primary-container: #0E2A09;
    --secondary-container: #DCEAD2;
    --on-secondary-container: #1E2E14;

    --surface: #FBFDF8;
    --surface-1: #F1F6EC;
    --surface-2: #E9F0E1;
    --surface-variant: #DFE7D6;
    --on-surface: #1A1F16;
    --on-surface-variant: #444B3C;

    --bg-1: #E7F2DE;
    --bg-2: #F3F8EC;
    --bg-3: #FBFDF8;

    --outline: #C3CCB5;
    --outline-variant: #D9E1CC;
    --warn: #B26A00;
    --warn-soft: rgba(178, 106, 0, .12);
    --danger: #B3261E;
    --ok: #2E7D32;

    --radius: 22px;
    --radius-sm: 16px;
    --radius-pill: 999px;

    --shadow-1: 0 1px 2px rgba(26, 31, 22, .08), 0 1px 3px rgba(26, 31, 22, .06);
    --shadow-2: 0 2px 6px rgba(26, 31, 22, .10), 0 6px 16px rgba(26, 31, 22, .08);
    --shadow-3: 0 8px 20px rgba(26, 31, 22, .12), 0 14px 36px rgba(26, 31, 22, .10);
    --shadow: var(--shadow-2);
    --shadow-sm: var(--shadow-1);

    --font: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
            "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #B4D8A6;
        --primary-d: #9CC78C;
        --on-primary: #173510;
        --primary-container: #2F4B29;
        --on-primary-container: #CDEBC0;
        --secondary-container: #364B2C;
        --on-secondary-container: #C4E3B5;

        --surface: #141A10;
        --surface-1: #1B2216;
        --surface-2: #232B1C;
        --surface-variant: #404A35;
        --on-surface: #DEE3D6;
        --on-surface-variant: #BFC8AE;

        --bg-1: #0C1108;
        --bg-2: #11160D;
        --bg-3: #0A0E06;

        --outline: #566149;
        --outline-variant: #3A4330;
        --warn: #E8B66A;
        --warn-soft: rgba(232, 182, 106, .16);
        --danger: #F2B8B0;
        --ok: #86D98A;

        --shadow-1: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px rgba(0, 0, 0, .36);
        --shadow-2: 0 2px 6px rgba(0, 0, 0, .44), 0 6px 16px rgba(0, 0, 0, .40);
        --shadow-3: 0 8px 20px rgba(0, 0, 0, .50), 0 14px 36px rgba(0, 0, 0, .46);
    }
}

/* 手动主题覆盖 */
[data-theme="light"] {
    --primary: #4F8B47; --primary-d: #3C6E36; --on-primary: #FFFFFF;
    --primary-container: #D6EBD0; --on-primary-container: #0E2A09;
    --secondary-container: #DCEAD2; --on-secondary-container: #1E2E14;
    --surface: #FBFDF8; --surface-1: #F1F6EC; --surface-2: #E9F0E1;
    --surface-variant: #DFE7D6; --on-surface: #1A1F16; --on-surface-variant: #444B3C;
    --bg-1: #E7F2DE; --bg-2: #F3F8EC; --bg-3: #FBFDF8;
    --outline: #C3CCB5; --outline-variant: #D9E1CC;
    --warn: #B26A00; --warn-soft: rgba(178, 106, 0, .12); --danger: #B3261E; --ok: #2E7D32;
    --shadow: var(--shadow-2); --shadow-sm: var(--shadow-1);
}
[data-theme="dark"] {
    --primary: #B4D8A6; --primary-d: #9CC78C; --on-primary: #173510;
    --primary-container: #2F4B29; --on-primary-container: #CDEBC0;
    --secondary-container: #364B2C; --on-secondary-container: #C4E3B5;
    --surface: #141A10; --surface-1: #1B2216; --surface-2: #232B1C;
    --surface-variant: #404A35; --on-surface: #DEE3D6; --on-surface-variant: #BFC8AE;
    --bg-1: #0C1108; --bg-2: #11160D; --bg-3: #0A0E06;
    --outline: #566149; --outline-variant: #3A4330;
    --warn: #E8B66A; --warn-soft: rgba(232, 182, 106, .16); --danger: #F2B8B0; --ok: #86D98A;
    --shadow: var(--shadow-2); --shadow-sm: var(--shadow-1);
}

/* ---------- 基础 ---------- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font);
    color: var(--on-surface);
    background:
        radial-gradient(1100px 560px at 85% -12%, color-mix(in srgb, var(--primary) 16%, transparent), transparent 60%),
        linear-gradient(160deg, var(--bg-1), var(--bg-2) 45%, var(--bg-3));
    /* 已移除 background-attachment: fixed —— 它会让滚动时整页重绘背景，是卡顿主因之一。
       渐变改为随内容正常滚动，观感几乎无差别但流畅很多。 */
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ---------- 顶栏 ---------- */
.topbar {
    position: sticky; top: 0; z-index: 50;
    display: flex; align-items: center; gap: 14px;
    padding: 10px 18px;
    /* 已移除 backdrop-filter: blur() —— sticky 顶栏 + 毛玻璃会让滚动时每一帧都重算模糊，
       是本站卡顿的最大元凶。改用 MD3 规范里的实色顶栏：观感几乎一致，成本几乎为零。 */
    background: var(--surface);
    border-bottom: 1px solid var(--outline-variant);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.brand-logo {
    width: 36px; height: 36px; border-radius: 12px; object-fit: cover;
    background: linear-gradient(135deg, #6FB15F, var(--primary));
    color: #fff; display: inline-flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 18px;
}
.brand-logo-text { font-size: 20px; }
.brand-text { white-space: nowrap; }

.topnav { display: flex; gap: 4px; margin-left: 10px; flex-wrap: wrap; }
.topnav a {
    padding: 8px 14px; border-radius: var(--radius-pill);
    color: var(--on-surface-variant); font-size: 14px; transition: background .15s, color .15s;
}
.topnav a:hover { background: var(--surface-2); color: var(--on-surface); }
.topnav a.active { background: var(--primary-container); color: var(--on-primary-container); font-weight: 700; }

.top-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn {
    width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--outline);
    background: var(--surface); color: var(--on-surface); cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; transition: background .15s;
}
.icon-btn:hover { background: var(--surface-2); }

.btn-ghost {
    padding: 9px 16px; border-radius: var(--radius-pill); border: 1px solid var(--outline);
    background: var(--surface); color: var(--on-surface); font-size: 14px; cursor: pointer;
    transition: background .15s, border-color .15s;
}
.btn-ghost:hover { background: var(--primary-container); border-color: var(--primary); color: var(--on-primary-container); }

/* ---------- 主区域 ---------- */
.main { flex: 1; width: 100%; position: relative; z-index: 1; }
.container { width: min(1200px, 100%); margin: 0 auto; padding: 22px 16px 40px; }
.site-footer {
    text-align: center; color: var(--on-surface-variant); font-size: 12.5px;
    padding: 18px 16px calc(20px + env(safe-area-inset-bottom)); border-top: 1px solid var(--outline-variant);
}

/* ---------- 首页 Hero / 搜索 ---------- */
.hero { text-align: center; padding: 18px 0 8px; }
.hero-title { font-size: clamp(22px, 4vw, 32px); margin: 0 0 6px; }
.hero-sub { color: var(--on-surface-variant); margin: 0; }
.hero-sub b { color: var(--primary); }

.search-bar {
    display: flex; align-items: center; gap: 8px; max-width: 620px; margin: 18px auto;
    background: var(--surface); border: 1px solid var(--outline); border-radius: var(--radius-pill);
    padding: 8px 8px 8px 16px; box-shadow: var(--shadow-sm);
}
.search-bar.inline { margin: 0; max-width: 360px; box-shadow: none; }
.search-ico { color: var(--on-surface-variant); flex: none; }
.search-bar input {
    flex: 1; border: 0; outline: 0; background: transparent; color: var(--on-surface);
    font-size: 15px; padding: 8px 4px;
}
.search-bar button {
    border: 0; background: var(--primary); color: var(--on-primary); font-weight: 600;
    padding: 10px 20px; border-radius: var(--radius-pill); cursor: pointer; font-size: 14px; transition: background .15s;
}
.search-bar button:hover { background: var(--primary-d); }
.search-clear { color: var(--on-surface-variant); font-size: 13px; padding: 0 6px; white-space: nowrap; }
.search-clear:hover { color: var(--primary); }

/* ---------- 卡片网格 ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(var(--xf-cols, 5), minmax(0, 1fr));
    gap: 16px; margin-top: 10px;
}
.card {
    background: var(--surface); border: 1px solid var(--outline-variant); border-radius: var(--radius);
    padding: 16px; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 6px;
    box-shadow: var(--shadow-sm); transition: transform .15s, box-shadow .15s, border-color .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-3); border-color: color-mix(in srgb, var(--primary) 40%, var(--outline)); }
.card-icon { width: 52px; height: 52px; border-radius: 14px; object-fit: cover; background: var(--surface-2); }
.card-name { font-weight: 700; font-size: 15px; word-break: break-word; }
.card-meta { color: var(--on-surface-variant); font-size: 12.5px; }
.card-desc {
    color: var(--on-surface-variant); font-size: 12.5px; line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* ---------- 详情页 ---------- */
.back-link { display: inline-block; color: var(--on-surface-variant); font-size: 14px; margin-bottom: 14px; }
.back-link:hover { color: var(--primary); }
.detail-card {
    background: var(--surface); border: 1px solid var(--outline-variant); border-radius: var(--radius);
    padding: 22px; text-align: center; box-shadow: var(--shadow-sm); margin-bottom: 18px;
}
.detail-icon { width: 72px; height: 72px; border-radius: 18px; object-fit: cover; box-shadow: var(--shadow-sm); }
.detail-title { margin: 12px 0 6px; font-size: 22px; }
.detail-meta { display: flex; gap: 14px; justify-content: center; color: var(--on-surface-variant); font-size: 13px; flex-wrap: wrap; }
.detail-desc { color: var(--on-surface); margin: 14px auto 0; max-width: 640px; text-align: left; white-space: pre-wrap; }

.section-title { font-size: 17px; margin: 8px 0 12px; }
.link-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.link-item {
    display: flex; align-items: center; gap: 12px; background: var(--surface);
    border: 1px solid var(--outline-variant); border-radius: var(--radius-sm); padding: 12px 14px;
}
.link-item.has-pwd {
    border-left: 4px solid var(--primary);
    background: var(--secondary-container);
}
.link-info { flex: 1; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.link-tag { font-size: 12px; color: var(--on-surface-variant); }
.link-name { font-weight: 600; font-size: 14.5px; word-break: break-all; }
.link-lock { font-size: 12.5px; color: var(--on-secondary-container); font-weight: 600; }
.link-badge {
    flex: none; border: 0; background: var(--primary); color: var(--on-primary); font-weight: 600;
    padding: 10px 18px; border-radius: var(--radius-pill); cursor: pointer; font-size: 14px;
    transition: background .15s, color .15s, box-shadow .15s; box-shadow: var(--shadow-1);
}
.link-badge:hover { background: var(--primary-d); box-shadow: var(--shadow-2); }
.link-item.has-pwd .link-badge {
    background: transparent; color: var(--on-secondary-container);
    border: 1px solid var(--primary); box-shadow: none;
}
.link-item.has-pwd .link-badge:hover {
    background: var(--primary-container); color: var(--on-primary-container);
}

/* ---------- 通用卡片 / 空状态 / 提示 ---------- */
.card .empty, .empty { color: var(--on-surface-variant); text-align: center; padding: 22px; }
.empty-state { text-align: center; padding: 50px 20px; color: var(--on-surface-variant); }
.empty-state .btn-primary { margin-top: 14px; }
.alert { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 14px; margin-bottom: 14px; }
.alert-error { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }
.alert-ok { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.alert-warn { background: color-mix(in srgb, var(--warn) 16%, transparent); color: color-mix(in srgb, var(--warn) 70%, #000); }
.perm-cmd {
  margin: -6px 0 16px; padding: 12px 14px;
  background: #1e2421; color: #b8f0c4;
  border-radius: var(--radius-sm);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px; line-height: 1.7; white-space: pre-wrap; word-break: break-all;
}

/* ---------- 按钮 ---------- */
.btn-primary {
    display: inline-block; border: 0; background: var(--primary); color: var(--on-primary); font-weight: 600;
    padding: 11px 22px; border-radius: var(--radius-pill); cursor: pointer; font-size: 14px; text-align: center;
    transition: background .15s, box-shadow .15s; box-shadow: var(--shadow-1);
}
.btn-primary:hover { background: var(--primary-d); box-shadow: var(--shadow-2); }
.btn-primary.block { width: 100%; }
.btn-danger {
    color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 40%, var(--outline));
    background: var(--surface); padding: 7px 14px; border-radius: var(--radius-pill); font-size: 13px; cursor: pointer;
}
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }

/* ---------- 分页 ---------- */
.pager { display: flex; gap: 6px; justify-content: center; align-items: center; flex-wrap: wrap; margin: 26px 0 10px; }
.pager-btn {
    min-width: 38px; height: 38px; padding: 0 12px; display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--outline); background: var(--surface); color: var(--on-surface); border-radius: var(--radius-pill); font-size: 14px;
    transition: background .15s, border-color .15s;
}
.pager-btn:hover { border-color: var(--primary); color: var(--primary); }
.pager-btn.is-current { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.pager-gap { color: var(--on-surface-variant); padding: 0 4px; }

/* ---------- 后台 ---------- */
.admin-toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.admin-actions { margin-left: auto; }
.card { background: var(--surface); border: 1px solid var(--outline-variant); border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; }
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th, .data-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--outline-variant); }
.data-table th { background: var(--surface-2); color: var(--on-surface-variant); font-weight: 600; font-size: 13px; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: var(--surface-1); }
.cell-name { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.mini-icon { width: 30px; height: 30px; border-radius: 9px; object-fit: cover; background: var(--surface-2); flex: none; }
.cell-ops { white-space: nowrap; }
.cell-ops a { margin-right: 6px; }

/* ---------- 表单 ---------- */
.form-card { max-width: 720px; margin: 0 auto; padding: 22px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-full { grid-column: 1 / -1; }
.field > span { font-size: 13.5px; font-weight: 600; color: var(--on-surface); }
.field input[type=text], .field input[type=number], .field input[type=password], .field textarea {
    width: 100%; padding: 11px 14px; border: 1px solid var(--outline); border-radius: 14px;
    background: var(--surface); color: var(--on-surface); font-size: 14px; font-family: inherit; outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent);
}
.field textarea { resize: vertical; min-height: 80px; line-height: 1.5; }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 6px; }
.paste-tools { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.paste-tools .hint { color: var(--on-surface-variant); font-size: 12.5px; }
.preview-row { display: flex; align-items: center; gap: 12px; padding: 12px; background: var(--surface-2); border-radius: 14px; }
.preview-label { font-size: 13px; color: var(--on-surface-variant); }
.brand-preview { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; }

/* 下载链接多行编辑器 */
.link-rows { display: flex; flex-direction: column; gap: 10px; margin-bottom: 10px; }
.link-row {
    display: grid; grid-template-columns: 1.3fr 2.4fr 1fr auto; gap: 8px; align-items: center;
    background: var(--surface-1); border: 1px solid var(--outline-variant);
    border-radius: var(--radius-sm); padding: 8px 10px;
}
.link-row input {
    width: 100%; padding: 10px 12px; border: 1px solid var(--outline); border-radius: 12px;
    background: var(--surface); color: var(--on-surface); font-size: 13.5px; font-family: inherit; outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.link-row input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
.row-del {
    border: 0; background: transparent; color: var(--on-surface-variant); cursor: pointer;
    width: 36px; height: 36px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
    font-size: 20px; line-height: 1; transition: background .15s, color .15s;
}
.row-del:hover { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); }
.add-row-btn { align-self: flex-start; }

/* 验证码 */
.captcha-row { display: flex; align-items: center; gap: 10px; }
.captcha-box {
    font-family: "Courier New", monospace; font-size: 20px; font-weight: 800; letter-spacing: 4px;
    background: var(--surface-2); border: 1px solid var(--outline); border-radius: 12px;
    padding: 4px 14px; color: var(--primary); user-select: none;
}

/* ---------- 登录 ---------- */
.page-login { justify-content: center; }
.login-wrap { flex: 1; display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-card {
    width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--outline-variant);
    border-radius: var(--radius); box-shadow: var(--shadow-3); padding: 30px 28px; text-align: center;
}
.login-title { margin: 0 0 4px; font-size: 22px; }
.login-sub { color: var(--on-surface-variant); margin: 0 0 20px; font-size: 14px; }
.login-card .field { text-align: left; margin-bottom: 14px; }
.login-back { display: inline-block; margin-top: 14px; color: var(--on-surface-variant); font-size: 13px; }
.login-back:hover { color: var(--primary); }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
    .topnav { display: none; }
    .form-grid { grid-template-columns: 1fr; }
    .data-table thead { display: none; }
    .data-table, .data-table tbody, .data-table tr, .data-table td { display: block; width: 100%; }
    .data-table tr { border-bottom: 1px solid var(--outline-variant); padding: 8px 0; }
    .data-table td { border: 0; padding: 4px 14px; }
    .cell-ops { padding-bottom: 12px !important; }

    .link-row { grid-template-columns: 1fr 1fr auto; }
    .link-row .col-url { grid-column: 1 / -1; }
    .link-row .row-del { grid-column: 3; justify-self: end; }
}