@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');

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

/* ========= THEME VARIABLES (LIGHT + DARK) ========= */

.page {
    /* Light mode defaults */
    --bg-body: #ffffff;
    --bg-navbar: #ffffff;
    --bg-sidebar: #ffffff;
    --bg-videos: #f9f9f9;
    --text-primary: #000000;
    --text-muted: #606060;
    --border-color: #cccccc;
    --category-hover: #f9f9f9;
    --category-active: #d0d0d0;
    --icon-color: #606060;
}

/* When checkbox is checked → override variables = DARK MODE */
.theme-toggle:checked + .page {
    --bg-body: #0f0f0f;
    --bg-navbar: #0f0f0f;
    --bg-sidebar: #0f0f0f;
    --bg-videos: #181818;
    --text-primary: #f1f1f1;
    --text-muted: #aaaaaa;
    --border-color: #303030;
    --category-hover: #272727;
    --category-active: #383838;
    --icon-color: #f1f1f1;
}

/* Hide the checkbox itself */
.theme-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}


body {
    font-family: 'Roboto', sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
    padding: 0 16px;
    position: sticky;
    top: 0;
    background: var(--bg-navbar);
    border-bottom: 1px solid var(--border-color);
    z-index: 10;
}

.navbar .logo {
    display: flex;
    align-items: center;
    margin-left: 8px;
}

.logo img {
    width: 100px;
    margin-left: 10px;
}

.navbar .searchbar {
    display: flex;
    height: 32px;
    align-items: center;
    flex: 1;
    max-width: 600px;
    margin: 0 16px;
}

.search {
    display: flex;
    border: 1px solid var(--border-color);
    width: 600px;
    margin-right: 10px;
    height: 100%;
    background: var(--bg-body);
}
.search input {
    border: none;
    width: 90%;
    padding-left: 10px;
    background: transparent;
    color: var(--text-primary);
}

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

.search button {
    border: none;
    border-left: 1px solid var(--border-color);
    width: 10%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--category-hover);
    cursor: pointer;
}

.search button i {
    margin: 0;
}

.material-icons {
    color: var(--icon-color);
    margin-right: 10px;
}

.navigation-icons {
    display: flex;
    align-items: center;
}

/* ========= DARK MODE SWITCH ========= */

.theme-switch {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 26px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    margin-left: 4px;
    position: relative;
    cursor: pointer;
    overflow: hidden;
}

.theme-switch:hover {
    background: var(--category-hover);
}

/* two icons stacked, we show/hide with checkbox state */
.theme-icon-sun,
.theme-icon-moon {
    font-size: 18px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Default (light mode) → sun visible, moon hidden */
.theme-icon-sun {
    opacity: 1;
    transform: translateY(0);
}
.theme-icon-moon {
    opacity: 0;
    transform: translateY(10px);
}

/* Dark mode → moon visible, sun hidden */
.theme-toggle:checked + .page .theme-icon-sun {
    opacity: 0;
    transform: translateY(-10px);
}
.theme-toggle:checked + .page .theme-icon-moon {
    opacity: 1;
    transform: translateY(0);
}


.mainbody {
    display: flex;
    height: calc(100vh - 56px);
    overflow: hidden; /*https://www.w3schools.com/css/css_overflow.asp*/
}

.category-section {
    border-bottom: 1px solid #cccccc;
    margin-top: 10px;
}

.category-section .category:last-child{
    margin-bottom: 10px;
}

.categories {
    width: 240px;
    height: 100%;
    background: var(--bg-sidebar);
    overflow-y: scroll;
}

.category-heading{
    margin: 10px 0px 10px 25px;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
}

.category {
    width: 100%;
    display: flex;
    align-items: center;
    height: 40px;
    padding: 0 24px;
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
    color: var(--icon-color);
}

.category:hover {
    background: var(--category-hover);
}

.active {
    background: var(--category-active);
    font-weight: 500;
}


.active:hover {
    background: #d0d0d0;
}

.active i {
    color: red;
}

.category i {
    margin-right: 24px;
}

.categories-footer {
    padding: 25px;
}

.footer-section {
    margin-bottom: 12px;
}

.footer-section span {
    font-size: 13px;
    font-weight: 500;
    margin-right: 5px;
    color: var(--text-muted);
    cursor: pointer;
}

.copyright {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 400;
    margin-bottom: 20px;
}
.videos {
    width: calc(100vw - 240px);
    height: 100%;
    background: var(--bg-videos);
    border-top: 1px solid var(--border-color);
    overflow-y: scroll;
}

.video-grid {
    display: flex;
    flex-wrap: wrap;
    padding: 15px;
}

.video {
    width: calc(25% - 12px);
    margin-right: 12px;
    cursor: pointer;
    margin-bottom: 35px;
    /* margin: 20px; */
}

.video .thumbnail img {
    width: 100%;
    display: block;
    border-radius: 8px;
}

.video .details {
    display: flex;
    margin-top: 5px;
    width: 90%;
}

.video .profile {
    margin-right: 12px;
}

.video .profile img {
    border-radius: 50%;
    width: 36px;
    height: 36px;
}

.video .video-details p {
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    color: var(--text-primary);
}

.video .posted-by {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
}