:root {
    /* Light Mode Variables */
    --yc-bg-color: #f9f9f9;
    --yc-header-bg: #ffffff;
    --yc-sidebar-bg: #ffffff;
    --yc-text-primary: #0f0f0f;
    --yc-text-secondary: #606060;
    --yc-border-color: #e5e5e5;
    --yc-hover-bg: #f2f2f2;
    --yc-accent-color: #cc0000; /* YouTube-like Red */
    --yc-focus-blue: #3ea6ff;
    --yc-scrollbar-track: transparent;
    --yc-scrollbar-thumb: #909090;
    
    /* Dimensions */
    --header-height: 56px;
    --sidebar-width-expanded: 245px;
    --sidebar-width-collapsed: 75px;
    --sidebar-width-mobile: 270px;
}

[data-theme="dark"] {
    /* Dark Mode Variables */
    --yc-bg-color: #0f0f0f;
    --yc-header-bg: #0f0f0f;
    --yc-sidebar-bg: #0f0f0f;
    --yc-text-primary: #f1f1f1;
    --yc-text-secondary: #aaaaaa;
    --yc-border-color: #303030;
    --yc-hover-bg: #272727;
    --yc-scrollbar-thumb: #717171;
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--yc-bg-color);
    color: var(--yc-text-primary);
    overflow-x: hidden; /* Prevent horizontal scroll */
    transition: background-color 0.3s, color 0.3s;
}

/* Slender Fancy Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--yc-scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background-color: transparent; /* Hidden by default */
    border-radius: 4px;
}
body:hover::-webkit-scrollbar-thumb,
.yc-sidebar:hover::-webkit-scrollbar-thumb {
    background-color: var(--yc-scrollbar-thumb);
}

/* Helper Classes */
.yc-hidden { display: none !important; }
.yc-flex { display: flex; }
.yc-items-center { align-items: center; }

/* ========================================================================
   HEADER
   ======================================================================== */
.yc-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--yc-header-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    z-index: 1000;
}

/* Left Section: Menu + Logo */
.yc-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.yc-hamburger-btn {
    background: none;
    border: none;
    color: var(--yc-text-primary);
    font-size: 20px;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
}
.yc-hamburger-btn:hover {
    background-color: var(--yc-hover-bg);
}

.yc-logo {
    display: flex;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: var(--yc-text-primary);
    font-size: 1.2rem;
    font-weight: bold;
    letter-spacing: -0.5px;
    position: relative;
}
.yc-logo i {
    color: var(--yc-accent-color);
    font-size: 28px;
}

/* Middle Section: Search */
.yc-header-center {
    flex: 0 1 728px; /* Max width constraint */
    display: flex;
    align-items: center;
    margin: 0 40px;
}

.yc-search-container {
    display: flex;
    width: 100%;
}

.yc-search-input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    background-color: var(--yc-header-bg);
    border: 1px solid var(--yc-border-color);
    border-right: none;
    border-radius: 40px 0 0 40px;
    padding: 0 4px 0 16px;
    margin-left: 32px;
    height: 40px;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.01);
}

.yc-search-input-wrapper:focus-within {
    border-color: #1c62b9;
    margin-left: 0;
    padding-left: 16px; 
}

.yc-search-input {
    width: 100%;
    border: none;
    background: transparent;
    font-size: 16px;
    color: var(--yc-text-primary);
    outline: none;
    font-family: 'Roboto', sans-serif;
}

.yc-search-btn {
    width: 64px;
    height: 40px;
    background-color: var(--yc-hover-bg);
    border: 1px solid var(--yc-border-color);
    border-radius: 0 40px 40px 0;
    cursor: pointer;
    color: var(--yc-text-primary);
}
.yc-search-btn:hover {
    background-color: #d3d3d3; 
    color: #000;
}
[data-theme="dark"] .yc-search-btn:hover {
    background-color: #3f3f3f;
    color: #fff;
}

.yc-mic-btn {
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-left: 8px;
    cursor: pointer;
    color: var(--yc-text-primary);
    background-color: var(--yc-hover-bg);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Right Section: Icons */
.yc-header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.yc-icon-btn {
    background: none;
    border: none;
    color: var(--yc-text-primary);
    font-size: 18px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
.yc-icon-btn:hover {
    background-color: var(--yc-hover-bg);
}

.yc-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background-color: var(--yc-accent-color);
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 10px;
    border: 2px solid var(--yc-header-bg);
}

/* Desktop Login Button */
.yc-login-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1px solid var(--yc-border-color);
    border-radius: 18px;
    color: #3ea6ff;
    background: transparent;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
}
.yc-login-btn:hover {
    background-color: rgba(62, 166, 255, 0.1);
}
.yc-login-btn i {
    font-size: 18px;
}

/* User Avatar (Mobile Default / Auth State) */
.yc-user-avatar-btn {
    display: none; 
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    padding: 0;
    overflow: hidden;
}
.yc-user-avatar-btn img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
/* If logged in on desktop, show avatar instead of login button (handled by WP logic logic) */
body.logged-in .yc-user-avatar-btn {
    display: block;
}
body.logged-in .yc-login-btn {
    display: none;
}

/* Dropdowns */
.yc-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    width: 300px;
    background-color: var(--yc-header-bg);
    border: 1px solid var(--yc-border-color);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: none; /* JS toggles this */
    flex-direction: column;
    overflow: hidden;
    z-index: 1001;
}
.yc-dropdown-header {
    padding: 12px;
    border-bottom: 1px solid var(--yc-border-color);
    font-weight: bold;
}
.yc-dropdown-item {
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    color: var(--yc-text-primary);
}
.yc-dropdown-item:hover {
    background-color: var(--yc-hover-bg);
}
.yc-dropdown-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
}

/* Mobile Search Modal */
.yc-search-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--yc-header-bg);
    z-index: 2000;
}
.yc-search-modal.active {
    display: flex;
    flex-direction: column;
}
.yc-search-modal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    border-bottom: 1px solid var(--yc-border-color);
}
.yc-search-modal-input {
    flex: 1;
    background: var(--yc-hover-bg);
    border: none;
    padding: 10px 16px;
    border-radius: 20px;
    color: var(--yc-text-primary);
    font-size: 16px;
    outline: none;
    width: 100%;
}
.yc-search-suggestions {
    padding: 8px 0;
}
.yc-suggestion-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    cursor: pointer;
    font-weight: 500;
}
.yc-suggestion-item i { color: var(--yc-text-secondary); }
.yc-suggestion-item:hover { background-color: var(--yc-hover-bg); }

.yc-cart-wrapper, .yc-notif-wrapper, .yc-user-wrapper, .yc-more-wrapper {
    position: relative;
}

/* ========================================================================
   SIDEBAR
   ======================================================================== */
.yc-sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width-expanded);
    background-color: var(--yc-sidebar-bg);
    overflow-y: auto;
    border-right: 1px solid transparent; 
    transition: width 0.2s;
    padding-right: 1px;
    z-index: 999;
}

body.sidebar-collapsed .yc-sidebar {
    width: var(--sidebar-width-collapsed);
}
body.sidebar-collapsed .yc-sidebar .yc-nav-text,
body.sidebar-collapsed .yc-sidebar .yc-section-title,
body.sidebar-collapsed .yc-sidebar .yc-nav-footer {
    display: none;
}
body.sidebar-collapsed .yc-sidebar .yc-nav-item {
    flex-direction: column;
    padding: 16px 0;
    gap: 6px;
    justify-content: center;
}
body.sidebar-collapsed .yc-sidebar .yc-nav-icon {
    margin-right: 0;
    font-size: 20px;
}
body.sidebar-collapsed .yc-sidebar .yc-nav-text-mini {
    display: block;
    font-size: 10px;
    text-align: center;
    white-space: nowrap;
}

/* Default Sidebar Items */
.yc-nav-section {
    padding: 12px;
    border-bottom: 1px solid var(--yc-border-color);
}
.yc-nav-section:last-child { border-bottom: none; }

.yc-nav-item {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 10px;
    cursor: pointer;
    color: var(--yc-text-primary);
    text-decoration: none;
    margin-bottom: 4px;
}
.yc-nav-item:hover {
    background-color: var(--yc-hover-bg);
}
.yc-nav-item.active {
    background-color: var(--yc-hover-bg);
    font-weight: 500;
}
.yc-nav-icon {
    width: 24px;
    margin-right: 24px;
    font-size: 18px;
    text-align: center;
}
.yc-nav-text {
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.yc-nav-text-mini {
    display: none; /* Only for collapsed mode */
}
.yc-section-title {
    font-size: 14px;
    font-weight: bold;
    color: var(--yc-text-secondary);
    padding: 8px 12px;
    margin-top: 8px;
}

/* Mobile Overlay for Sidebar */
.yc-mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s;
}
.yc-mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Theme Toggle in Sidebar */
.yc-theme-toggle {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    cursor: pointer;
}

/* ========================================================================
   MAIN CONTENT
   ======================================================================== */
.yc-main-content {
    margin-top: var(--header-height);
    margin-left: 246px; /* 245 sidebar + 1px spacing */
    padding: 24px;
    transition: margin-left 0.2s;
    min-height: 100vh;
}

body.sidebar-collapsed .yc-main-content {
    margin-left: 76px; /* 75 sidebar + 1px */
}

/* Category Chips (Filter bar) */
.yc-chips-bar {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 16px;
    margin-bottom: 16px;
    /* Hide scrollbar for chips */
    scrollbar-width: none; 
    -ms-overflow-style: none;
}
.yc-chips-bar::-webkit-scrollbar { display: none; }

.yc-chip {
    background-color: var(--yc-hover-bg);
    color: var(--yc-text-primary);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
    transition: background 0.2s;
    border: 1px solid transparent;
}
.yc-chip.active {
    background-color: var(--yc-text-primary);
    color: var(--yc-bg-color);
}
.yc-chip:hover:not(.active) {
    background-color: #d8d8d8;
}
[data-theme="dark"] .yc-chip:hover:not(.active) {
    background-color: #3f3f3f;
}

/* Video Grid */
.yc-video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    row-gap: 40px;
}

.yc-video-card {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.yc-thumbnail-container {
    position: relative;
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16/9;
    background-color: #ccc;
}
.yc-thumbnail-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}
.yc-video-card:hover .yc-thumbnail-container img {
    transform: scale(1.02); /* Slight zoom on hover */
}
.yc-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 12px;
    font-weight: 500;
    padding: 3px 4px;
    border-radius: 4px;
}

.yc-video-info {
    display: flex;
    margin-top: 12px;
    gap: 12px;
}

.yc-channel-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: #888;
    flex-shrink: 0;
    overflow: hidden;
}
.yc-channel-avatar img { width: 100%; height: 100%; object-fit: cover; }

.yc-video-details {
    display: flex;
    flex-direction: column;
}

.yc-video-title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 4px;
    color: var(--yc-text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.yc-channel-name, .yc-video-meta {
    font-size: 14px;
    color: var(--yc-text-secondary);
}
.yc-channel-name:hover { color: var(--yc-text-primary); }

/* ========================================================================
   MOBILE FOOTER
   ======================================================================== */
.yc-mobile-footer {
    display: none; /* Hidden on Desktop */
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50px;
    background-color: var(--yc-header-bg);
    border-top: 1px solid var(--yc-border-color);
    z-index: 1000;
    justify-content: space-around;
    align-items: center;
}

.yc-m-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--yc-text-primary);
    text-decoration: none;
    flex: 1;
    height: 100%;
}
.yc-m-nav-item i {
    font-size: 20px;
    margin-bottom: 4px;
}
.yc-m-nav-item span {
    font-size: 10px;
}
.yc-m-plus-circle {
    font-size: 32px !important;
}

/* ========================================================================
   RESPONSIVE (MOBILE / TABLET)
   ======================================================================== */
@media (max-width: 768px) {
    /* Header Adjustments */
    .yc-header {
        justify-content: space-between;
        padding: 0 12px;
    }
    .yc-header-center {
        display: none; /* Hide full search bar */
    }
    
    /* --- Mobile Header Logic --- */
    
    /* Desktop elements to hide on mobile */
    .yc-login-btn { display: none !important; }
    /* Hide individual buttons that are now in the 3-dot menu */
    .yc-notif-wrapper { display: none; }
    .yc-cart-wrapper { display: none; }
    .mobile-search-mic { display: none; } 

    /* Elements to Show on Mobile */
    .mobile-search-trigger { display: flex !important; }
    .yc-more-wrapper { display: block !important; }
    .yc-user-avatar-btn { display: block !important; }

    /* Header Right Spacing */
    .yc-header-right { gap: 12px; }

    /* Sidebar Mobile Behavior */
    .yc-sidebar {
        transform: translateX(-100%); /* Hidden off-screen */
        width: var(--sidebar-width-mobile);
        transition: transform 0.3s ease;
        z-index: 1002; /* Above header */
        top: 0; /* Full height */
        border-right: none;
        box-shadow: 2px 0 12px rgba(0,0,0,0.3);
    }
    body.mobile-sidebar-open .yc-sidebar {
        transform: translateX(0); /* Slide in */
    }
    
    /* Add header inside sidebar for mobile (Logo + Close) */
    .yc-sidebar-header {
        display: flex;
        align-items: center;
        padding: 12px 16px;
        border-bottom: 1px solid var(--yc-border-color);
        min-height: var(--header-height);
    }
    .yc-sidebar-header .yc-hamburger-btn { margin-right: 16px; }

    /* Main Content Adjustments */
    .yc-main-content {
        margin-left: 0;
        padding: 12px;
        padding-bottom: 70px; /* Space for mobile footer */
    }
    body.sidebar-collapsed .yc-main-content { margin-left: 0; }
    
    /* Show Mobile Footer */
    .yc-mobile-footer {
        display: flex;
    }
    
    .yc-video-grid {
        grid-template-columns: 1fr; /* 1 column on mobile */
        gap: 16px;
    }
}

/* Hide Mobile Elements on Desktop */
@media (min-width: 769px) {
    .yc-sidebar-header { display: none; }
    .mobile-search-trigger { display: none !important; }
    .yc-more-wrapper { display: none !important; }
    .yc-search-modal { display: none !important; }
}

/* ========================================================================
   DUAL LOGO LOGIC
   ======================================================================== */

/* By default (Light Mode), hide the dark logo */
.yc-logo-dark {
    display: none;
}
.yc-logo-light {
    display: block;
}

/* When Dark Mode is active (data-theme="dark"), hide light logo and show dark logo */
[data-theme="dark"] .yc-logo-light {
    display: none;
}
[data-theme="dark"] .yc-logo-dark {
    display: block;
}