:root {
    --bg: #0b0d12;
    --surface: #12151d;
    --surface-2: #171b25;
    --border: #272d3a;
    --text: #f5f7fb;
    --muted: #9ca6b8;
    --primary: #6f91ff;
    --primary-strong: #5a7ff4;
    --success: #43c58a;
    --danger: #ff6d7a;
    --shadow: 0 18px 60px rgba(0,0,0,.25);
}

html[data-theme="light"] {
    --bg: #f4f6fa;
    --surface: #ffffff;
    --surface-2: #f7f8fb;
    --border: #dde2ea;
    --text: #161a22;
    --muted: #687386;
    --primary: #315fe9;
    --primary-strong: #244fd1;
    --success: #16895b;
    --danger: #d74755;
    --shadow: 0 18px 50px rgba(26,34,55,.09);
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

button, input, select { font: inherit; }
a { color: inherit; text-decoration: none; }

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 270px 1fr;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    border-right: 1px solid var(--border);
    background: var(--surface);
    padding: 22px 16px;
    display: flex;
    flex-direction: column;
}

.brand {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 4px 8px 22px;
}

.brand strong { display: block; font-size: 15px; }
.brand span, .user-card span { display: block; color: var(--muted); font-size: 12px; }

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    font-weight: 800;
    background: linear-gradient(135deg, #7397ff, #8d6cff);
    color: white;
}

.brand-mark.large {
    width: 56px;
    height: 56px;
    border-radius: 17px;
    margin-bottom: 22px;
}

.nav { display: grid; gap: 6px; }

.nav-link {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 12px;
    border-radius: 12px;
    color: var(--muted);
}

.nav-link:hover, .nav-link.active {
    background: var(--surface-2);
    color: var(--text);
}

.nav-link.active {
    box-shadow: inset 3px 0 0 var(--primary);
}

.sidebar-bottom {
    margin-top: auto;
    display: grid;
    gap: 10px;
}

.user-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 14px;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: white;
    font-weight: 800;
}

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

.topbar {
    height: 72px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 28px;
    position: sticky;
    top: 0;
    z-index: 5;
    background: var(--bg);
}

.theme-form { margin-left: auto; }

.icon-button {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}

.content {
    max-width: 1500px;
    margin: 0 auto;
    padding: 38px;
}

.welcome {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 25px;
    margin-bottom: 30px;
}

.welcome h1 {
    font-size: clamp(30px, 4vw, 48px);
    line-height: 1.05;
    margin: 7px 0 12px;
    letter-spacing: -.035em;
}

.eyebrow {
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .12em;
}

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

.version-badge, .count {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    padding: 8px 11px;
    border-radius: 999px;
    font-size: 12px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.card, .panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.card {
    padding: 22px;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card.accent {
    background: linear-gradient(145deg, rgba(111,145,255,.12), var(--surface));
}

.card-icon { font-size: 26px; }
.card-label { color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.card h2 { margin: 6px 0 3px; font-size: 22px; }
.card p { color: var(--muted); margin: 0; }

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 28px;
    background: radial-gradient(circle at 25% 15%, rgba(111,145,255,.12), transparent 28%), var(--bg);
}

.auth-card {
    width: min(100%, 430px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 34px;
    box-shadow: var(--shadow);
}

.auth-card h1 {
    font-size: 38px;
    margin: 7px 0 8px;
    letter-spacing: -.035em;
}

.form-stack {
    display: grid;
    gap: 16px;
    margin-top: 26px;
}

label span {
    display: block;
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 7px;
}

label small {
    display: block;
    color: var(--muted);
    margin-top: 6px;
}

input, select {
    width: 100%;
    padding: 12px 13px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    outline: none;
}

input:focus, select:focus {
    border-color: var(--primary);
}

.button {
    appearance: none;
    border: 0;
    border-radius: 12px;
    padding: 12px 16px;
    cursor: pointer;
    font-weight: 800;
    text-align: center;
}

.button.primary { background: var(--primary); color: white; }
.button.primary:hover { background: var(--primary-strong); }

.button.secondary {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
}

.button.small { padding: 8px 10px; font-size: 12px; }
.button.block { display: block; width: 100%; }

.alert {
    padding: 12px 14px;
    border-radius: 12px;
    margin: 18px 0;
    border: 1px solid var(--border);
}

.alert.error { color: var(--danger); }
.alert.success { color: var(--success); }

.admin-layout {
    display: grid;
    grid-template-columns: minmax(280px, 390px) 1fr;
    gap: 18px;
    align-items: start;
}

.panel { padding: 22px; }
.panel h2 { margin-top: 0; }

.panel-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.table-wrap { overflow: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

th, td {
    text-align: left;
    padding: 13px 10px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

th {
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
}

.status {
    padding: 5px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
}

.status.on { color: var(--success); }
.status.off { color: var(--danger); }
.small-text { font-size: 12px; }
.mobile-only { display: none; }

@media (max-width: 1000px) {
    .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .admin-layout { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    .app-shell { display: block; }

    .sidebar {
        position: fixed;
        z-index: 20;
        left: -290px;
        width: 270px;
        transition: left .2s ease;
        box-shadow: var(--shadow);
    }

    .sidebar.open { left: 0; }

    .mobile-only {
        display: grid;
        margin-right: 12px;
    }

    .content { padding: 24px 18px; }
    .topbar { padding: 0 18px; }
    .grid { grid-template-columns: 1fr; }
    .welcome { flex-direction: column; }
}