/* =========================================
   Sidebar
========================================= */
.sidebar {
    width: 260px;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 0;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
    z-index: 100;
    font-size: 0.8125rem;
}

.sidebar-header {
    padding: 0 1.5rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo-name {
    font-size: 1.25rem;
    font-weight: 800;
    line-height: 1.2;
}

.logo-desc {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1.2;
}

.logo-icon {
    color: var(--accent-primary);
    width: 24px;
    height: 24px;
    filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.5));
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0 1rem;
}

.sidebar-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-item i {
    width: 18px;
    height: 18px;
    transition: color var(--transition-fast);
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: var(--bg-card);
}

.nav-item.active {
    color: var(--text-primary);
    background-color: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.nav-item.active i {
    color: var(--accent-primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 60%;
    width: 3px;
    background: var(--gradient-brand);
    border-radius: 0 4px 4px 0;
}

.sidebar-footer {
    padding: 1.5rem 1.5rem 0;
    margin-top: auto;
}

.sidebar-credit {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
}

.sidebar-credit a {
    color: var(--accent-primary);
    text-decoration: none;
}

.sidebar-credit a:hover {
    text-decoration: underline;
}

.add-feed-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem;
    border-radius: 12px;
    border: 1px dashed var(--text-muted);
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.add-feed-btn:hover {
    border-color: var(--accent-primary);
    background-color: rgba(99, 102, 241, 0.05);
    color: var(--accent-primary);
    transform: translateY(-1px);
}

.settings-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    padding: 0.75rem;
    margin-top: 0.5rem;
    border-radius: 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.settings-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-card);
}

.settings-btn i {
    width: 18px;
    height: 18px;
}

/* =========================================
   Main Content Area
========================================= */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
}

/* Header */
.top-header {
    height: 80px;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(15, 17, 26, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.search-trigger-wrap {
    position: relative;
    width: 280px;
}

.search-bar {
    display: flex;
    align-items: center;
    width: 100%;
    gap: 0.625rem;
}

.search-bar-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    pointer-events: none;
}

.search-bar-icon i {
    width: 18px;
    height: 18px;
}

.search-bar input {
    flex: 1;
    min-width: 0;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(40, 44, 60, 0.9);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

/* Search filters panel (shown when search is focused) */
.search-filters-panel {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    z-index: 50;
    min-width: 320px;
}

.search-filters-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-start;
}

.filter-group {
    flex: 1;
    min-width: 120px;
}

.filter-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-chip {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-chip:hover {
    border-color: var(--border-highlight);
    color: var(--text-primary);
}

.filter-chip.active {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.filter-sort select {
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-family: var(--font-body);
    cursor: pointer;
}

.clear-filters-btn {
    margin-top: 0.75rem;
    padding: 0.35rem 0;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-body);
    cursor: pointer;
    text-decoration: underline;
}

.clear-filters-btn:hover {
    color: var(--accent-primary);
}

/* Feed summary bar */
.feed-summary {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.feed-summary-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-muted);
}

.feed-summary-new {
    color: var(--accent-primary);
    font-weight: 500;
}

.feed-summary-muted {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.feed-summary-dot--sep {
    margin-left: 0.25rem;
}

.feed-summary-filter-btn {
    margin-left: auto;
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.feed-summary-filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-highlight);
}

.feed-summary-filter-btn + .feed-summary-filter-btn {
    margin-left: 0.5rem;
}

.feed-summary-filter-btn.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    color: var(--text-primary);
    background: var(--bg-card);
    border-color: var(--border-highlight);
    transform: translateY(-2px);
}

/* Feed Container Layout */
.feed-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    scroll-behavior: auto;
}