.app-shell {
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 30;
    width: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    background: rgba(7, 22, 37, 0.94);
    border-right: 1px solid var(--color-border);
}

.brand {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 0 var(--space-5);
    border-bottom: 1px solid var(--color-border);
}

.brand-mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    color: var(--color-brand-ink);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-soft) 88%, var(--color-secondary) 100%);
    box-shadow: var(--shadow-glow);
}

.brand-name {
    margin: 0;
    color: var(--color-primary-soft);
    font-family: Sora, Inter, sans-serif;
    font-size: 24px;
    line-height: 1;
    font-weight: 800;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4) 0;
}

.nav-section {
    margin: var(--space-6) var(--space-5) var(--space-2);
    color: var(--color-muted);
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
}

.nav-link {
    min-height: 52px;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5);
    border-left: 4px solid transparent;
    color: var(--color-text);
    font-weight: 700;
    transition: background 150ms ease, color 150ms ease, border-color 150ms ease;
}

.nav-link:hover,
.nav-link.is-active {
    border-left-color: var(--color-primary);
    background: rgba(244, 196, 48, 0.14);
    color: var(--color-primary-soft);
}

.sidebar-nav .nav-link.is-active {
    border-left-color: var(--color-primary);
    background: rgba(244, 196, 48, 0.14);
    color: var(--color-primary-soft);
}

.nav-link .material-symbols-outlined {
    width: 24px;
    color: currentColor;
}

.sidebar-cta {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.topbar {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    z-index: 20;
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: 0 var(--space-5);
    background: rgba(7, 22, 37, 0.78);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(18px);
}

.topbar-search {
    position: relative;
    width: min(448px, 100%);
}

.topbar-search .material-symbols-outlined {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-soft);
}

.topbar-search input {
    width: 100%;
    height: 42px;
    padding: 0 16px 0 44px;
    color: var(--color-text);
    background: var(--color-surface-2);
    border: 1px solid transparent;
    border-radius: 999px;
    outline: 0;
}

.topbar-search input:focus {
    border-color: var(--color-primary-soft);
    box-shadow: var(--shadow-glow);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.icon-button,
.avatar-button {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    color: var(--color-muted);
    background: transparent;
    border: 0;
    border-radius: 999px;
    transition: background 150ms ease, color 150ms ease, transform 150ms ease;
}

.icon-button:hover,
.avatar-button:hover {
    color: var(--color-primary-soft);
    background: rgba(255, 255, 255, 0.06);
}

.avatar-button {
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.avatar-button img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.content {
    width: min(1440px, calc(100% - var(--sidebar-width)));
    min-height: 100vh;
    margin-left: var(--sidebar-width);
    padding: calc(var(--topbar-height) + 30px) var(--space-5) var(--space-7);
}

.mobile-bottom-nav {
    display: none;
}

@media (max-width: 900px) {
    .sidebar {
        display: none;
    }

    .topbar {
        left: 0;
    }

    .content {
        width: 100%;
        margin-left: 0;
        padding: calc(var(--topbar-height) + 20px) var(--space-4) 92px;
    }

    .topbar-search {
        max-width: 100%;
    }

    .topbar-actions .icon-button:nth-child(2),
    .topbar-actions .icon-button:nth-child(3) {
        display: none;
    }

    .mobile-bottom-nav {
        position: fixed;
        inset: auto 0 0 0;
        z-index: 40;
        height: 68px;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        align-items: center;
        background: rgba(7, 22, 37, 0.92);
        border-top: 1px solid var(--color-border);
        backdrop-filter: blur(18px);
    }

    .mobile-bottom-nav a {
        height: 68px;
        display: grid;
        place-items: center;
        color: var(--color-muted);
        font-size: 11px;
        font-weight: 700;
    }

    .mobile-bottom-nav a.is-active {
        color: var(--color-primary-soft);
    }
}