:root {
    --bg-primary: #05060a;
    --bg-secondary: #0c1018;
    --bg-panel: rgba(15, 18, 28, 0.8);
    --text-primary: #f7f0ed;
    --text-muted: #b7bbc9;
    --accent-rosegold: #efb8a2;
    --accent-rose-strong: #f29c94;
    --accent-silver: #c5cbd8;
    --border-soft: rgba(239, 184, 162, 0.25);
    --shadow-strong: 0 25px 60px rgba(3, 4, 8, 0.55);
    --radius-large: 24px;
    --radius-medium: 18px;
    --transition-fast: 0.2s ease;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: radial-gradient(circle at top, rgba(239, 184, 162, 0.15), transparent 45%), var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.app-wrapper {
    min-height: 100vh;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0.4));
    display: flex;
    flex-direction: column;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: rgba(7, 9, 14, 0.82);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.header-inner {
    max-width: 1300px;
    margin: 0 auto;
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-rosegold);
}

.brand::before {
    content: '';
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-rosegold), var(--accent-silver));
    box-shadow: inset 0 0 12px rgba(255, 255, 255, 0.35);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 18px;
}

.main-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: var(--transition-fast);
}

.main-nav a:hover {
    color: var(--accent-rosegold);
    border-color: rgba(239, 184, 162, 0.4);
    box-shadow: 0 0 20px rgba(239, 184, 162, 0.2);
}

.user-chip {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    font-size: 13px;
    color: var(--accent-silver);
}

.user-chip strong {
    color: var(--text-primary);
    font-size: 14px;
}

.app-main {
    flex: 1;
    display: flex;
    max-width: 1300px;
    width: 100%;
    margin: 0 auto;
    padding: 30px 24px 60px;
    gap: 24px;
}

.app-sidebar {
    width: 240px;
    background: var(--bg-panel);
    border-radius: var(--radius-large);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-strong);
    padding: 24px;
    height: fit-content;
}

.app-sidebar h3 {
    margin: 0 0 18px;
    font-size: 14px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-silver);
}

.sidebar-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sidebar-links a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 11px 14px;
    border-radius: var(--radius-medium);
    transition: var(--transition-fast);
    border: 1px solid transparent;
    background: rgba(255, 255, 255, 0.01);
}

.sidebar-links a:hover {
    border-color: rgba(239, 184, 162, 0.35);
    background: rgba(239, 184, 162, 0.08);
    color: var(--accent-rosegold);
}

.page-content {
    flex: 1;
    background: var(--bg-panel);
    border-radius: var(--radius-large);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: var(--shadow-strong);
    padding: 32px;
    min-height: 400px;
}

.page-content h1 {
    margin-top: 0;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.card,
.table-shell,
.firmware-wrap .card,
.logs-wrap .card {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0.4));
    border-radius: var(--radius-large);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--shadow-strong);
}

footer {
    border-top: 1px solid var(--border-soft);
    padding: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    margin-top: auto;
}

footer a {
    color: var(--accent-rosegold);
    text-decoration: none;
}

@media (max-width: 960px) {
    .app-main {
        flex-direction: column;
    }

    .app-sidebar {
        width: 100%;
    }

    .page-content {
        padding: 24px;
    }

    .main-nav {
        flex-wrap: wrap;
        justify-content: flex-end;
    }
}