/* ===== Top Nav ===== */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: calc(var(--nav-height) + env(safe-area-inset-top, 0px));
    padding-top: env(safe-area-inset-top, 0px);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
    z-index: 100;
}

.top-nav__user span {
    display: none;
}

.top-nav__logo {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.top-nav__user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ===== Bottom Nav (Mobile) ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 100;
}

.bottom-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.625rem;
    font-weight: 500;
    color: var(--color-text-muted);
    min-width: 48px;
    min-height: 44px;
    justify-content: center;
    transition: color var(--transition);
    text-transform: uppercase;
}

.bottom-nav__item:hover,
.bottom-nav__item--active {
    color: var(--color-text);
}

.bottom-nav__item svg {
    width: 20px;
    height: 20px;
    stroke-width: 1.5;
}

/* ===== Sidebar (Desktop) ===== */
.sidebar {
    display: none;
}

/* ===== Main Content ===== */
.main-content {
    padding-top: calc(var(--nav-height) + env(safe-area-inset-top, 0px) + var(--space-xl));
    padding-bottom: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom, 0px) + var(--space-xl));
    padding-left: var(--space-md);
    padding-right: var(--space-md);
    min-height: 100vh;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
}

/* ===== Desktop (>= 768px) ===== */
@media (min-width: 768px) {
    .top-nav {
        padding-left: var(--space-lg);
        padding-right: var(--space-lg);
    }

    .top-nav__user span {
        display: inline;
    }

    .main-content {
        padding-left: var(--space-lg);
        padding-right: var(--space-lg);
    }

    .bottom-nav {
        display: none;
    }

    .sidebar {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        bottom: 0;
        width: var(--sidebar-width);
        background: var(--color-bg);
        border-right: 1px solid var(--color-border);
        padding: var(--space-lg) 0;
        overflow-y: auto;
        z-index: 90;
    }

    .sidebar__item {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
        padding: 0.5rem var(--space-lg);
        font-size: var(--font-size-sm);
        color: var(--color-text-light);
        min-height: 40px;
        transition: all var(--transition);
    }

    .sidebar__item:hover {
        color: var(--color-text);
    }

    .sidebar__item--active {
        color: var(--color-text);
        font-weight: 600;
    }

    .sidebar__item svg {
        width: 18px;
        height: 18px;
        flex-shrink: 0;
        stroke-width: 1.5;
    }

    .sidebar__section {
        padding: var(--space-xs) var(--space-lg);
        font-size: 0.6875rem;
        font-weight: 500;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: var(--color-text-muted);
        margin-top: var(--space-lg);
    }

    .sidebar__section:first-child {
        margin-top: 0;
    }

    .main-content {
        margin-left: var(--sidebar-width);
        padding-bottom: var(--space-2xl);
    }
}

/* ===== Auth Layout ===== */
.auth-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-lg);
    background: var(--color-bg);
}

.auth-layout .main-content {
    padding: 0;
    margin: 0;
    min-height: auto;
}