:root {
    --bg: #0b0f17;
    --panel: #101828;
    --panel2: #0f1624;
    --text: #e7ecff;
    --muted: #a8b3d6;
    --border: rgba(255,255,255,.10);
    --brandA: #4e70f2;
    --brandB: #4f18ac;
    --radius: 16px;
    --shadow: 0 18px 60px rgba(0,0,0,.35);
    --sidebarW: 260px;
    --topbarH: 64px;
    font-synthesis-weight: none;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: radial-gradient(1200px 900px at 20% 10%, rgba(78,112,242,.18), transparent 60%), radial-gradient(900px 700px at 70% 30%, rgba(79,24,172,.16), transparent 55%), var(--bg);
    color: var(--text);
}

a {
    color: inherit;
    text-decoration: none;
}

small {
    color: var(--muted);
}

.shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: var(--sidebarW) 1fr;
}

.sidebar {
    border-right: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(255,255,255,.03), transparent 45%);
    padding: 18px;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 10px 14px 10px;
}

.logo {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--brandA), var(--brandB));
    box-shadow: 0 12px 35px rgba(79,24,172,.22);
}

.brand-title {
    font-weight: 700;
    letter-spacing: .2px;
}

.nav {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

    .nav a {
        padding: 10px 12px;
        border-radius: 12px;
        border: 1px solid transparent;
        color: var(--muted);
    }

        .nav a.active, .nav a:hover {
            color: var(--text);
            border-color: var(--border);
            background: rgba(255,255,255,.04);
        }

.main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    height: var(--topbarH);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 22px;
    border-bottom: 1px solid var(--border);
    background: rgba(16,24,40,.50);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.04);
    color: var(--muted);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.04);
    color: var(--text);
    cursor: pointer;
}

    .btn.primary {
        border: none;
        background: linear-gradient(135deg, var(--brandA), var(--brandB));
        box-shadow: 0 18px 55px rgba(78,112,242,.20);
    }

.content {
    padding: 22px;
}

.card {
    border: 1px solid var(--border);
    background: rgba(16,24,40,.55);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.stat {
    padding: 16px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.03);
}

    .stat .k {
        font-size: 22px;
        font-weight: 800;
    }

    .stat .l {
        color: var(--muted);
        margin-top: 6px;
    }

.auth-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card {
    width: min(520px, 100%);
    border: 1px solid var(--border);
    background: rgba(16,24,40,.60);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 22px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 12px;
}

.input {
    padding: 12px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.03);
    color: var(--text);
    outline: none;
}

    .input:focus {
        border-color: rgba(78,112,242,.55);
    }

.error {
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(255,60,60,.35);
    background: rgba(255,60,60,.10);
}