:root {
    --u2e-bg: #080b0f;
    --u2e-panel: #10161d;
    --u2e-panel-2: #151d26;
    --u2e-line: #27313d;
    --u2e-text: #eef4f8;
    --u2e-muted: #8fa0ae;
    --u2e-accent: #19c37d;
    --u2e-accent-2: #47a7ff;
    --u2e-danger: #ff5d5d;
    --u2e-warning: #f4b740;
    --u2e-radius: 8px;
    --u2e-font: Inter, Segoe UI, Roboto, Arial, sans-serif;
}

html, body {
    min-height: 100%;
    background: var(--u2e-bg);
    color: var(--u2e-text);
    font-family: var(--u2e-font);
}

a { color: inherit; }

.u2e-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 248px 1fr;
    background: radial-gradient(circle at 70% -10%, rgba(71, 167, 255, .14), transparent 28%), var(--u2e-bg);
}

.u2e-sidebar {
    border-right: 1px solid var(--u2e-line);
    background: rgba(9, 13, 18, .96);
    padding: 20px 14px;
    position: sticky;
    top: 0;
    height: 100vh;
}

.u2e-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 28px;
    padding: 0 8px;
    color: var(--u2e-text);
    font-weight: 700;
}

.u2e-logo {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(25, 195, 125, .55);
    border-radius: var(--u2e-radius);
    color: var(--u2e-accent);
    background: rgba(25, 195, 125, .08);
}

.u2e-nav {
    display: grid;
    gap: 4px;
}

.u2e-nav a {
    padding: 11px 12px;
    border-radius: var(--u2e-radius);
    color: var(--u2e-muted);
    text-decoration: none;
    font-size: .95rem;
}

.u2e-nav a.active, .u2e-nav a:hover {
    background: var(--u2e-panel-2);
    color: var(--u2e-text);
}

.u2e-main { min-width: 0; }

.u2e-topbar {
    height: 64px;
    border-bottom: 1px solid var(--u2e-line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    background: rgba(8, 11, 15, .82);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.u2e-topbar span, .u2e-muted { color: var(--u2e-muted); }
.u2e-user { color: var(--u2e-accent); font-weight: 700; }
.u2e-content { padding: 26px 28px 42px; }

.u2e-page-title {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    margin-bottom: 20px;
}

h1 { font-size: 1.55rem; margin: 0; letter-spacing: 0; }
h2 { font-size: 1.08rem; margin: 0 0 14px; letter-spacing: 0; }

.u2e-grid { display: grid; gap: 14px; }
.u2e-grid.cards { grid-template-columns: repeat(5, minmax(160px, 1fr)); }
.u2e-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.u2e-grid.form { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-span-2 { grid-column: span 2; }
.grid-span-3 { grid-column: span 3; }

.u2e-card, .u2e-panel {
    background: rgba(16, 22, 29, .94);
    border: 1px solid var(--u2e-line);
    border-radius: var(--u2e-radius);
}

.u2e-card { padding: 16px; }
.u2e-panel { padding: 18px; margin-bottom: 16px; }
.u2e-card label { color: var(--u2e-muted); font-size: .78rem; text-transform: uppercase; }
.u2e-card strong { display: block; font-size: 1.45rem; margin-top: 8px; }

.u2e-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.u2e-actions.end { justify-content: flex-end; }

.btn-u2e, .btn-u2e-secondary, .btn-u2e-danger {
    border: 1px solid transparent;
    border-radius: var(--u2e-radius);
    padding: 9px 13px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.btn-u2e { background: var(--u2e-accent); color: #04110b; }
.btn-u2e-secondary { background: var(--u2e-panel-2); color: var(--u2e-text); border-color: var(--u2e-line); }
.btn-u2e-danger { background: rgba(255, 93, 93, .14); color: #ffb9b9; border-color: rgba(255, 93, 93, .35); }

.form-control, .form-select, textarea {
    background-color: #0b1117 !important;
    color: var(--u2e-text) !important;
    border-color: var(--u2e-line) !important;
    border-radius: var(--u2e-radius) !important;
}

.form-label { color: var(--u2e-muted); font-size: .86rem; margin-bottom: 6px; }
.validation-message { color: var(--u2e-danger); font-size: .82rem; }

.u2e-table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
}

.u2e-table th, .u2e-table td {
    padding: 11px 10px;
    border-bottom: 1px solid var(--u2e-line);
    vertical-align: middle;
}

.u2e-table th {
    color: var(--u2e-muted);
    font-size: .78rem;
    text-transform: uppercase;
    font-weight: 700;
}

.u2e-table tr:hover td { background: rgba(71, 167, 255, .06); }
.u2e-chart { height: 320px; }
.u2e-login { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.u2e-login-box { width: min(420px, 100%); }
.u2e-badge { color: var(--u2e-accent); border: 1px solid rgba(25,195,125,.35); padding: 4px 8px; border-radius: 999px; font-size: .78rem; }

@media (max-width: 1100px) {
    .u2e-grid.cards { grid-template-columns: repeat(2, 1fr); }
    .u2e-grid.two, .u2e-grid.form { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    .u2e-shell { grid-template-columns: 1fr; }
    .u2e-sidebar { position: relative; height: auto; }
    .u2e-nav { grid-template-columns: repeat(2, 1fr); }
    .u2e-topbar { position: relative; padding: 0 16px; }
    .u2e-content { padding: 18px 14px 32px; }
}