/* ===== App Layout ===== */
.app-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== Header (YouTube Style) ===== */
.yt-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--yt-header-height);
    background: var(--yt-bg-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
    border-bottom: 1px solid var(--yt-border);
}

.yt-header-start {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 200px;
}

.yt-header-center {
    flex: 1;
    display: flex;
    justify-content: center;
    max-width: 728px;
    margin: 0 40px;
}

.yt-header-end {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 200px;
    justify-content: flex-end;
}

/* Logo */
.yt-logo {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 20px;
    font-weight: 600;
    color: var(--yt-text-primary);
    text-decoration: none;
}

.yt-logo-icon {
    width: 90px;
    height: 20px;
    background: var(--yt-accent-red);
    border-radius: var(--yt-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* ===== Sidebar (YouTube Style) ===== */
.yt-sidebar {
    position: fixed;
    top: var(--yt-header-height);
    left: 0;
    bottom: 0;
    width: var(--yt-sidebar-width);
    background: var(--yt-bg-primary);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 12px 0;
    z-index: 900;
    transition: width 0.2s, transform 0.2s;
}

.yt-sidebar.collapsed {
    width: var(--yt-sidebar-mini);
}

.yt-sidebar-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 10px 12px 10px 24px;
    color: var(--yt-text-primary);
    font-size: 14px;
    border-radius: var(--yt-radius-lg);
    margin: 0 12px;
    transition: background 0.2s;
}

.yt-sidebar-item:hover {
    background: var(--yt-bg-hover);
}

.yt-sidebar-item.active {
    background: var(--yt-bg-secondary);
    font-weight: 500;
}

.yt-sidebar-item i {
    font-size: 18px;
    width: 22px;
    text-align: center;
}

.yt-sidebar-item span {
    white-space: nowrap;
}

.yt-sidebar.collapsed .yt-sidebar-item {
    flex-direction: column;
    gap: 6px;
    padding: 16px 0;
    margin: 0;
    border-radius: 0;
    justify-content: center;
    text-align: center;
}

.yt-sidebar.collapsed .yt-sidebar-item span {
    font-size: 10px;
}

.yt-sidebar-divider {
    height: 1px;
    background: var(--yt-border);
    margin: 12px 0;
}

.yt-sidebar-title {
    padding: 8px 24px;
    font-size: 14px;
    color: var(--yt-text-secondary);
    font-weight: 500;
}

/* Sidebar Overlay (Mobile) */
.yt-sidebar-overlay {
    position: fixed;
    top: var(--yt-header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 899;
    display: none;
}

.yt-sidebar-overlay.active {
    display: block;
}

/* ===== Main Content ===== */
.yt-main {
    margin-top: var(--yt-header-height);
    margin-left: var(--yt-sidebar-width);
    padding: 24px;
    min-height: calc(100vh - var(--yt-header-height));
    transition: margin-left 0.2s;
}

.yt-main.sidebar-collapsed {
    margin-left: var(--yt-sidebar-mini);
}

/* ===== Filter Bar ===== */
/* From index.html originally */
.yt-filter-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1rem;
    margin-bottom: 1rem;
    position: sticky;
    top: 56px;
    /* Adjust based on header height */
    z-index: 99;
    background: var(--yt-bg-primary);
    border-bottom: 1px solid var(--yt-border);
}

/* ===== Responsive Layout Overrides ===== */
@media (max-width: 1024px) {
    .yt-sidebar {
        transform: translateX(-100%);
    }

    .yt-sidebar.open {
        transform: translateX(0);
    }

    .yt-main {
        margin-left: 0;
    }

    .yt-header-center {
        margin: 0 20px;
    }
}

@media (max-width: 768px) {
    .yt-header-center {
        display: flex;
        /* Show search on mobile */
        margin: 0 8px;
        max-width: none;
        flex: 1;
        justify-content: center;
    }

    .yt-header-start,
    .yt-header-end {
        min-width: auto;
    }

    .yt-logo span:last-child {
        display: none;
    }

    .yt-main {
        padding: 12px;
    }

    /* Reduce header padding to match */
    .yt-header {
        padding: 0 12px !important;
    }

    /* Filter bar spacing */
    .yt-filter-bar {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .yt-main {
        padding: 16px;
    }
}