/* ============================================================
   远控管理系统 - 全局设计系统
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
    /* 背景层级 */
    --bg-app:        #080b16;
    --bg-surface:    #111728;
    --bg-surface-2:  #18203a;
    --bg-surface-3:  #222c4a;
    --bg-elevated:   #1c2540;

    /* 边框 */
    --border:        #283353;
    --border-light:  #36426a;
    --border-strong: #4a578a;

    /* 文本 */
    --text:          #e8eef9;
    --text-2:        #9faecb;
    --text-muted:    #62708f;

    /* 主题色 */
    --primary:       #4f8cff;
    --primary-600:   #3b73e6;
    --primary-glow:  rgba(79, 140, 255, .45);
    --success:       #34d399;
    --success-glow:  rgba(52, 211, 153, .4);
    --danger:        #fb5b5b;
    --warning:       #fbbf24;
    --purple:        #a78bfa;
    --cyan:          #22d3ee;

    /* 圆角 / 阴影 */
    --radius:        16px;
    --radius-sm:     10px;
    --radius-xs:     8px;
    --shadow-sm:     0 2px 8px rgba(0, 0, 0, .25);
    --shadow:        0 12px 32px rgba(0, 0, 0, .38);
    --shadow-lg:     0 20px 60px rgba(0, 0, 0, .5);

    /* 字体 */
    --font:          -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono:     'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'Consolas', 'Courier New', monospace;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    background: var(--bg-app);
    color: var(--text);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

/* 动态极光背景 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(60vw 60vw at 12% -10%, rgba(79, 140, 255, .14), transparent 60%),
        radial-gradient(50vw 50vw at 100% 0%, rgba(167, 139, 250, .12), transparent 55%),
        radial-gradient(55vw 55vw at 80% 110%, rgba(52, 211, 153, .10), transparent 60%);
    pointer-events: none;
}

a { color: inherit; text-decoration: none; }
code, pre { font-family: var(--font-mono); }

::selection { background: var(--primary-glow); color: #fff; }

/* 滚动条 */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; border: 2px solid transparent; background-clip: padding-box; }
*::-webkit-scrollbar-thumb:hover { background: var(--border-strong); background-clip: padding-box; }

/* ---------- 通用工具 ---------- */
.text-muted { color: var(--text-muted) !important; }
.text-2 { color: var(--text-2) !important; }
.text-danger { color: var(--danger) !important; }
.text-success { color: var(--success) !important; }
.text-center { text-align: center; }

.mono { font-family: var(--font-mono); }

/* ============================================================
   登录 / 安装 公共布局
   ============================================================ */
.auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: linear-gradient(160deg, rgba(24, 32, 58, .92), rgba(17, 23, 40, .92));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    position: relative;
    overflow: hidden;
    animation: cardIn .5s cubic-bezier(.2, .8, .2, 1);
}
.auth-card.wide { max-width: 560px; }

.auth-card::before {
    content: '';
    position: absolute;
    top: -1px; left: -1px; right: -1px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--purple), transparent);
    opacity: .8;
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(16px) scale(.98); }
    to   { opacity: 1; transform: none; }
}

.auth-logo { text-align: center; margin-bottom: 28px; }
.auth-logo .logo-icon {
    width: 64px; height: 64px;
    margin: 0 auto 14px;
    border-radius: 18px;
    display: grid; place-items: center;
    font-size: 1.9rem; color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--purple));
    box-shadow: 0 10px 30px var(--primary-glow);
}
.auth-logo h1 { font-size: 1.4rem; font-weight: 700; letter-spacing: .3px; }
.auth-logo small { color: var(--text-muted); font-size: .82rem; }

/* 表单控件（覆盖 Bootstrap 暗色） */
.auth-card .form-control,
.modal-dark .form-control,
.form-control-dark {
    background: var(--bg-app);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 12px 16px;
    border-radius: var(--radius-xs);
    transition: border-color .2s, box-shadow .2s;
}
.auth-card .form-control:focus,
.modal-dark .form-control:focus,
.form-control-dark:focus {
    background: var(--bg-app);
    border-color: var(--primary);
    color: var(--text);
    box-shadow: 0 0 0 .2rem var(--primary-glow);
}
.auth-card .form-control::placeholder,
.form-control-dark::placeholder { color: var(--text-muted); }

.auth-card .input-group-text,
.input-group-text-dark {
    background: var(--bg-surface-2);
    border: 1px solid var(--border);
    color: var(--text-2);
}

/* 密码可见切换 */
.pwd-toggle {
    background: var(--bg-surface-2);
    border: 1px solid var(--border);
    border-left: none;
    color: var(--text-2);
    cursor: pointer;
    padding: 0 14px;
    transition: color .2s, background .2s;
}
.pwd-toggle:hover { color: var(--primary); background: var(--bg-surface-3); }

/* 按钮 */
.btn-gradient {
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    border: none;
    color: #fff;
    padding: 12px 16px;
    border-radius: var(--radius-xs);
    font-weight: 600;
    letter-spacing: .3px;
    transition: transform .15s, box-shadow .2s, filter .2s;
    cursor: pointer;
}
.btn-gradient:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 10px 24px var(--primary-glow);
    filter: brightness(1.06);
}
.btn-gradient:active { transform: translateY(0); }

.btn-success-grad {
    background: linear-gradient(135deg, #2cb67d, #1f9d68);
    border: none; color: #fff;
    padding: 12px 16px; border-radius: var(--radius-xs);
    font-weight: 600; transition: transform .15s, box-shadow .2s, filter .2s; cursor: pointer;
}
.btn-success-grad:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 10px 24px var(--success-glow); filter: brightness(1.06); }

/* 提示框 */
.alert-soft {
    border-radius: var(--radius-xs);
    padding: 10px 14px;
    font-size: .88rem;
    display: flex; align-items: center; gap: 8px;
    border: 1px solid;
}
.alert-soft.alert-danger { background: rgba(251, 91, 91, .1); border-color: rgba(251, 91, 91, .4); color: var(--danger); }
.alert-soft.alert-success { background: rgba(52, 211, 153, .1); border-color: rgba(52, 211, 153, .4); color: var(--success); }

/* ============================================================
   顶部导航
   ============================================================ */
.top-nav {
    background: rgba(17, 23, 40, .82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-brand { display: flex; align-items: center; gap: 12px; font-size: 1.05rem; font-weight: 700; color: var(--text); }
.nav-brand .brand-icon {
    width: 34px; height: 34px;
    border-radius: 10px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, var(--primary), var(--purple));
    color: #fff; font-size: 1rem;
    box-shadow: 0 6px 16px var(--primary-glow);
}
.nav-actions { display: flex; align-items: center; gap: 14px; }
.nav-user {
    color: var(--text-2); font-size: .9rem;
    display: flex; align-items: center; gap: 8px;
    padding: 6px 12px; border-radius: 20px;
    background: var(--bg-surface-2); border: 1px solid var(--border);
}
.nav-user i { color: var(--primary); }

/* ============================================================
   主容器 / 卡片
   ============================================================ */
.main-container { max-width: 1240px; margin: 0 auto; padding: 28px 24px 60px; }

.surface-card {
    background: linear-gradient(160deg, rgba(24, 32, 58, .6), rgba(17, 23, 40, .6));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* ---------- 统计卡片 ---------- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 24px;
}
.stat-card {
    background: linear-gradient(160deg, rgba(24, 32, 58, .7), rgba(17, 23, 40, .7));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    display: flex; align-items: center; gap: 18px;
    transition: transform .2s, border-color .2s, box-shadow .2s;
    position: relative;
    overflow: hidden;
}
.stat-card::after {
    content: ''; position: absolute; right: -30px; top: -30px;
    width: 120px; height: 120px; border-radius: 50%;
    background: var(--stat-glow, var(--primary-glow));
    opacity: .12; filter: blur(8px);
}
.stat-card:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.stat-icon {
    width: 52px; height: 52px; border-radius: 14px;
    display: grid; place-items: center;
    font-size: 1.5rem;
    background: var(--stat-bg, rgba(79, 140, 255, .15));
    color: var(--stat-color, var(--primary));
}
.stat-value { font-size: 1.9rem; font-weight: 800; line-height: 1; letter-spacing: -.5px; }
.stat-label { color: var(--text-2); font-size: .84rem; margin-top: 6px; }
.stat-card.is-total { --stat-bg: rgba(79,140,255,.15); --stat-color: var(--primary); --stat-glow: var(--primary-glow); }
.stat-card.is-online { --stat-bg: rgba(52,211,153,.15); --stat-color: var(--success); --stat-glow: var(--success-glow); }
.stat-card.is-offline { --stat-bg: rgba(98,112,143,.15); --stat-color: var(--text-muted); --stat-glow: rgba(98,112,143,.3); }

/* ---------- 植入命令区 ---------- */
.install-section { padding: 22px; margin-bottom: 24px; }
.install-header { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; font-weight: 600; }
.install-header i { color: var(--success); }
.install-header .hint { margin-left: auto; font-weight: 400; color: var(--text-muted); font-size: .82rem; }
.install-cmd-row { display: flex; gap: 10px; align-items: stretch; }
.install-cmd-row code {
    flex: 1;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    padding: 12px 16px;
    color: var(--success);
    font-family: var(--font-mono);
    font-size: .85rem;
    overflow-x: auto;
    white-space: nowrap;
    line-height: 1.4;
}

/* ---------- 按钮族 ---------- */
.btn-soft {
    background: var(--bg-surface-2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: var(--radius-xs);
    transition: all .18s;
    cursor: pointer;
}
.btn-soft:hover { background: var(--bg-surface-3); border-color: var(--border-light); color: #fff; }

.btn-icon {
    width: 36px; height: 36px;
    display: grid; place-items: center;
    background: var(--bg-surface-2);
    border: 1px solid var(--border);
    color: var(--text-2);
    border-radius: var(--radius-xs);
    transition: all .18s; cursor: pointer;
}
.btn-icon:hover { background: var(--bg-surface-3); color: #fff; border-color: var(--border-light); }

.btn-copy { padding: 0 16px; }
.btn-copy:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

.btn-terminal {
    background: rgba(79, 140, 255, .14);
    border: 1px solid rgba(79, 140, 255, .35);
    color: var(--primary);
    border-radius: var(--radius-xs);
    font-size: .82rem; font-weight: 500;
    transition: all .18s;
}
.btn-terminal:hover { background: var(--primary); border-color: var(--primary); color: #fff; box-shadow: 0 6px 16px var(--primary-glow); }

.btn-outline-danger {
    border: 1px solid rgba(251, 91, 91, .35);
    color: var(--danger);
    background: transparent;
    border-radius: var(--radius-xs);
    transition: all .18s;
}
.btn-outline-danger:hover { background: var(--danger); border-color: var(--danger); color: #fff; }

/* ---------- 区块头 ---------- */
.section-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-bottom: 1px solid var(--border);
    gap: 12px; flex-wrap: wrap;
}
.section-header h5 { margin: 0; font-size: 1rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.section-header h5 i { color: var(--primary); }
.section-toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* 搜索框 */
.search-box {
    position: relative;
    display: flex; align-items: center;
}
.search-box i {
    position: absolute; left: 12px;
    color: var(--text-muted); font-size: .85rem; pointer-events: none;
}
.search-box input {
    background: var(--bg-app);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 20px;
    padding: 7px 14px 7px 32px;
    font-size: .85rem;
    width: 200px;
    transition: border-color .2s, width .2s, box-shadow .2s;
}
.search-box input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 .18rem var(--primary-glow); width: 230px; }

/* 筛选标签 */
.filter-chip {
    background: var(--bg-app);
    border: 1px solid var(--border);
    color: var(--text-2);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: .82rem;
    cursor: pointer;
    transition: all .18s;
}
.filter-chip:hover { border-color: var(--border-light); color: var(--text); }
.filter-chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ============================================================
   表格
   ============================================================ */
.agent-section { overflow: hidden; }
.table-wrap { overflow-x: auto; }

.table-custom { color: var(--text); margin: 0; width: 100%; border-collapse: collapse; }
.table-custom thead th {
    background: var(--bg-surface-2);
    border-bottom: 1px solid var(--border);
    border-top: none;
    padding: 13px 18px;
    font-size: .76rem; font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .6px;
    text-align: left;
    white-space: nowrap;
}
.table-custom tbody td {
    border-bottom: 1px solid var(--border);
    padding: 14px 18px;
    vertical-align: middle;
}
.table-custom tbody tr { background: transparent; transition: background .15s; }
.table-custom tbody tr:hover { background: rgba(79, 140, 255, .05); }
.table-custom tbody tr.agent-online td:first-child { box-shadow: inset 3px 0 0 var(--success); }
.table-custom tbody tr.agent-offline td:first-child { box-shadow: inset 3px 0 0 var(--text-muted); }

.host-name { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.host-name i { color: var(--text-2); }
.ip-code { font-family: var(--font-mono); font-size: .82rem; color: var(--cyan); }

/* 状态点 */
.status-dot {
    display: inline-block;
    width: 9px; height: 9px;
    border-radius: 50%;
    margin-right: 8px;
    vertical-align: middle;
    position: relative;
}
.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 0 0 var(--success-glow);
    animation: pulseGreen 2s infinite;
}
.status-dot.offline { background: var(--text-muted); }
@keyframes pulseGreen {
    0%   { box-shadow: 0 0 0 0 rgba(52, 211, 153, .5); }
    70%  { box-shadow: 0 0 0 7px rgba(52, 211, 153, 0); }
    100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.status-pill {
    display: inline-flex; align-items: center;
    font-size: .76rem; font-weight: 600;
    padding: 3px 10px; border-radius: 12px;
}
.status-pill.online { background: rgba(52, 211, 153, .14); color: var(--success); }
.status-pill.offline { background: rgba(98, 112, 143, .14); color: var(--text-muted); }

/* Agent ID 徽章 */
.agent-id-badge {
    font-family: var(--font-mono);
    font-size: .78rem;
    color: var(--purple);
    background: rgba(167, 139, 250, .12);
    padding: 3px 9px;
    border-radius: 6px;
    border: 1px solid rgba(167, 139, 250, .2);
    cursor: pointer;
    transition: all .15s;
}
.agent-id-badge:hover { background: rgba(167, 139, 250, .22); }

/* 操作按钮组 */
.row-actions { display: flex; gap: 6px; }
.row-actions .btn-icon { width: 34px; height: 34px; font-size: .85rem; }
.row-actions .btn-icon.danger:hover { background: var(--danger); border-color: var(--danger); color: #fff; }
.row-actions .btn-icon.edit:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 空状态 */
.empty-state { text-align: center; padding: 56px 20px; color: var(--text-muted); }
.empty-state i { font-size: 2.6rem; color: var(--border-strong); margin-bottom: 14px; display: block; }
.empty-state p { font-size: .92rem; }
.empty-state .sub { font-size: .82rem; color: var(--text-muted); margin-top: 4px; }

/* 加载态 */
.table-loading { text-align: center; padding: 40px; color: var(--text-muted); }
.spinner-ring {
    width: 22px; height: 22px;
    border: 2.5px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    display: inline-block;
    animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   弹窗（覆盖 Bootstrap）
   ============================================================ */
.modal-dark {
    background: linear-gradient(160deg, var(--bg-surface-2), var(--bg-surface));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    box-shadow: var(--shadow-lg);
}
.modal-dark .modal-header { border-bottom: 1px solid var(--border); padding: 18px 22px; }
.modal-dark .modal-title { font-weight: 700; display: flex; align-items: center; gap: 8px; }
.modal-dark .modal-body { padding: 22px; }
.modal-dark .modal-footer { border-top: 1px solid var(--border); padding: 16px 22px; }
.modal-dark .btn-close { filter: invert(1) grayscale(1) brightness(1.6); opacity: .7; }
.modal-dark .btn-close:hover { opacity: 1; }
.modal-dark .form-label { color: var(--text-2); font-size: .85rem; }
.modal-dark .btn-primary { background: var(--primary); border: none; }
.modal-dark .btn-primary:hover { background: var(--primary-600); }
.modal-dark .btn-secondary { background: var(--bg-surface-3); border: 1px solid var(--border); color: var(--text); }
.modal-dark .btn-danger { background: var(--danger); border: none; }
.modal-dark .btn-danger:hover { filter: brightness(1.08); }

/* ============================================================
   Toast
   ============================================================ */
.app-toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(24px);
    background: rgba(28, 37, 64, .95);
    border: 1px solid var(--toast-color, var(--success));
    color: var(--toast-color, var(--success));
    padding: 11px 20px;
    border-radius: 12px;
    font-size: .88rem;
    font-weight: 500;
    display: flex; align-items: center; gap: 9px;
    opacity: 0;
    transition: opacity .3s, transform .3s;
    z-index: 9999;
    box-shadow: var(--shadow);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.app-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 860px) {
    .stats-row { grid-template-columns: 1fr; }
    .nav-brand span.brand-text { display: none; }
}
@media (max-width: 640px) {
    .main-container { padding: 18px 14px 48px; }
    .install-cmd-row { flex-direction: column; }
    .install-cmd-row code { width: 100%; }
    .search-box input { width: 150px; }
    .search-box input:focus { width: 170px; }
    .section-header { padding: 14px; }
    .table-custom thead th, .table-custom tbody td { padding: 11px 12px; }
}