*,
*::before,
*::after {
    box-sizing: border-box
}

:root {
    --card: #050f26;
    --card-2: #08193a;
    --text: #ffffff;
    --muted: #ffffff;
    --accent: #00eeff;
    --accent-2: #ffd54a;
    --chip: #172d5f;
    --ring: 0 0 0 2px rgba(25, 95, 111, .45), 0 8px 18px rgba(0, 0, 0, .35);
    --shadow: 0 10px 20px rgba(0, 0, 0, .35);
    --radius: 16px
}

@font-face {
    font-display: swap;
    font-family: 'Ubuntu';
    font-style: normal;
    font-weight: 300;
    src: url('fonts/ubuntu-v20-latin-300.woff2') format('woff2'), url('fonts/ubuntu-v20-latin-300.woff') format('woff')
}

@font-face {
    font-display: swap;
    font-family: 'Ubuntu';
    font-style: normal;
    font-weight: 400;
    src: url('fonts/ubuntu-v20-latin-regular.woff2') format('woff2'), url('fonts/ubuntu-v20-latin-regular.woff') format('woff')
}

@font-face {
    font-display: swap;
    font-family: 'Ubuntu';
    font-style: normal;
    font-weight: 500;
    src: url('fonts/ubuntu-v20-latin-500.woff2') format('woff2'), url('fonts/ubuntu-v20-latin-500.woff') format('woff')
}

@font-face {
    font-display: swap;
    font-family: 'Ubuntu';
    font-style: normal;
    font-weight: 700;
    src: url('fonts/ubuntu-v20-latin-700.woff2') format('woff2'), url('fonts/ubuntu-v20-latin-700.woff') format('woff')
}

html,
body {
    height: 100%;
    color: var(--text);
    font-family: 'Ubuntu', Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background-color: #000a1e;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='250' height='30' viewBox='0 0 1000 120'%3E%3Crect fill='%23081b41' width='1000' height='120'/%3E%3Cg fill='none' stroke='%23172d5f' stroke-width='10' stroke-opacity='1'%3E%3Cpath d='M-500 75c0 0 125-30 250-30S0 75 0 75s125 30 250 30s250-30 250-30s125-30 250-30s250 30 250 30s125 30 250 30s250-30 250-30'/%3E%3Cpath d='M-500 45c0 0 125-30 250-30S0 45 0 45s125 30 250 30s250-30 250-30s125-30 250-30s250 30 250 30s125 30 250 30s250-30 250-30'/%3E%3Cpath d='M-500 105c0 0 125-30 250-30S0 105 0 105s125 30 250 30s250-30 250-30s125-30 250-30s250 30 250 30s125 30 250 30s250-30 250-30'/%3E%3Cpath d='M-500 15c0 0 125-30 250-30S0 15 0 15s125 30 250 30s250-30 250-30s125-30 250-30s250 30 250 30s125 30 250 30s250-30 250-30'/%3E%3Cpath d='M-500-15c0 0 125-30 250-30S0-15 0-15s125 30 250 30s250-30 250-30s125-30 250-30s250 30 250 30s125 30 250 30s250-30 250-30'/%3E%3Cpath d='M-500 135c0 0 125-30 250-30S0 135 0 135s125 30 250 30s250-30 250-30s125-30 250-30s250 30 250 30s125 30 250 30s250-30 250-30'/%3E%3C/g%3E%3C/svg%3E");
    background-attachment: fixed;
    background-size: 250px 30px
}

body {
    margin: 0;
    overflow-x: hidden
}

body.sidebar-open {
    overflow: hidden
}

a {
    color: inherit;
    text-decoration: none
}

img {
    display: block;
    max-width: 100%;
    height: auto
}

.app {
    position: relative;
    min-height: 100dvh
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    background: linear-gradient(180deg, rgba(0, 42, 133, 0.8), rgba(12, 37, 89, .7));
    backdrop-filter: blur(7px);
    border-bottom: 1px solid rgba(129, 173, 255, 0.300)
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px
}

.brand-logo {
    width: 30px;
    height: 25px;
    border-radius: 5px;
    overflow: hidden;
    box-shadow: var(--ring);
    background: #000
}

.brand-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover
}

.brand-name {
    font-weight: 800;
    letter-spacing: .2px
}

.menu-btn {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, rgba(255, 255, 255, .15), rgba(255, 255, 255, .07));
    border: 1px solid rgba(255, 255, 255, .15);
    border-radius: 10px;
    cursor: pointer;
    padding: 8px;
    z-index: 15;
    box-shadow: 0 4px 12px rgba(0, 0, 0, .25);
    transition: background .2s ease
}

.menu-btn:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, .2), rgba(255, 255, 255, .1))
}

.menu-btn span {
    width: 100%;
    height: 2px;
    background-color: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
    transform-origin: center
}

.menu-btn.is-open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg)
}

.menu-btn.is-open span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px)
}

.menu-btn.is-open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg)
}

.sidebar {
    position: fixed;
    top: 64px;
    right: 12px;
    width: 260px;
    background: linear-gradient(180deg, rgba(0, 28, 39, 0.9) 0%, rgba(8, 25, 58, 0.95) 100%);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, .3);
    border-radius: var(--radius);
    transform: translateX(calc(100% + 24px)) scale(0.98);
    transform-origin: top right;
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.3s ease, visibility 0.3s ease;
    z-index: 10;
    padding: 16px
}

.sidebar.is-open {
    transform: translateX(0) scale(1);
    opacity: 1;
    visibility: visible
}

.sidebar-title {
    text-align: center;
    color: var(--accent);
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 16px;
    text-transform: uppercase;
    letter-spacing: .5px
}

.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(255, 255, 255, .1), rgba(255, 255, 255, .05));
    border: 1px solid rgba(255, 255, 255, .12);
    color: var(--text);
    font-weight: 500;
    font-size: 16px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, .2);
    transition: all .2s ease
}

.sidebar-nav a:hover {
    background: linear-gradient(135deg, rgba(0, 238, 255, .15), rgba(0, 238, 255, .1));
    color: var(--accent);
    border-color: rgba(0, 238, 255, .3);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, .2)
}

.sidebar-nav .icon {
    width: 22px;
    height: 22px;
    color: var(--accent);
    transition: color .2s ease
}

.sidebar-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, .1);
    text-align: center
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 8px
}

.footer-links span {
    color: rgba(255, 255, 255, 0.4)
}

.privacy-link {
    display: inline-block;
    font-size: 13px;
    font-weight: 500;
    background: linear-gradient(90deg, var(--accent), rgb(81, 255, 162));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent
}

.copyright-text {
    margin: 0;
    font-size: 12px;
    color: rgba(255, 255, 255, .5)
}

.menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .5);
    z-index: 9;
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s ease, visibility .3s ease
}

.menu-overlay.is-open {
    opacity: 1;
    visibility: visible
}

.content {
    position: relative;
    z-index: 1;
    padding: 7px 7px 7px
}

@media (min-width:540px) {
    .content {
        width: min(1400px, calc(100% - 40px));
        max-width: none;
        margin-inline: auto
    }

    .topbar {
        padding-inline: 20px;
        border-radius: 0 0 16px 16px;
        width: min(1400px, calc(100% - 40px));
        margin: 0 auto
    }
}

.page-header {
    text-align: center;
    background: linear-gradient(180deg, var(--card) 0%, var(--card-2) 100%);
    border: 1px solid rgba(119, 255, 0, 0.394);
    padding-top: 10px;
    padding-bottom: 11px;
    border-radius: var(--radius);
    margin: 0px 0 0px
}

.page-title {
    font-size: 16px;
    font-weight: 500;
    color: greenyellow;
    letter-spacing: 1px;
    margin: 0
}

.page-subtitle {
    font-size: 13px;
    color: var(--muted);
    opacity: 0.9;
    margin-bottom: 0px;
    margin-top: 4px
}

.info-card {
    margin-top: 7px;
    background: linear-gradient(180deg, var(--card) 0%, var(--card-2) 100%);
    border-radius: var(--radius);
    padding: 12px;
    padding-left: 10px;
    padding-right: 10px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.262)
}

.info-card h2 {
    font-size: 15px;
    font-weight: 700;
    margin: 0 0 15px 0;
    padding-bottom: 1px;
    display: flex;
    align-items: center;
    text-align: center;
    gap: 10px;
    color: var(--accent)
}

.info-card h2 .icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0
}

.info-card p,
.info-card li {
    font-size: 14px;
    line-height: 1.6;
    color: var(--muted)
}

.info-card ul,
.info-card ol {
    padding-left: 20px;
    margin: 10px 0
}

.info-card li {
    margin-bottom: 10px
}

.info-card strong {
    font-weight: 500;
    color: var(--text)
}

.info-card .unit-title {
    display: block;
    margin-bottom: 8px;
    font-size: 15px
}

.theory-card .unit-title {
    color: var(--accent-2);
    font-weight: 500
}

.lab-card .unit-title {
    color: var(--accent);
    font-weight: 500
}

.info-card .sub-heading {
    font-size: 14px;
    font-weight: 500;
    margin-top: 30px;
    margin-bottom: 15px;
    text-align: center
}

.unit-topics {
    list-style-type: circle;
    padding-left: 20px;
    margin-top: 8px
}

.unit-topics li {
    margin-bottom: 8px;
    font-size: 15px
}

table {
    width: 100%;
    height: 100%;
    border-collapse: collapse;
    margin: 15px 0 0 0;
    font-size: 14px
}

th,
td {
    padding: 12px 10px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, .1)
}

th {
    font-weight: 500;
    color: var(--muted);
    text-transform: uppercase;
    font-size: 11px
}

thead th {
    text-align: center
}

td {
    font-size: 10px
}

td:not(:first-child),
th:not(:first-child) {
    text-align: center
}

tr:last-child td {
    border-bottom: none
}

tr.theory-row td:first-child {
    border-left: 2px solid var(--accent-2);
    padding-left: 12px;
    font-weight: 500;
    color: var(--accent-2)
}

tr.lab-row td:first-child {
    border-left: 2px solid var(--accent);
    padding-left: 12px;
    color: var(--accent)
}

.total-row td {
    font-weight: 700;
    color: var(--accent-2);
    border-top: 1px solid rgba(255, 255, 255, 0.2)
}

.syllabus-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit);
    gap: 8px;
}

.tab-btn {
    padding: 5px;
    padding-left: 7px;
    border: 1px solid rgba(255, 255, 255, .15);
    background: transparent;
    color: var(--text);
    font-family: inherit;
    font-size: 12px;
    font-weight: 700;
    border-radius: 7px;
    cursor: pointer;
    transition: all .2s ease;
    background-color: var(--chip);
}

.tab-btn:hover {
    background-color: #2a4c8a
}

.tab-btn.active.theory-active {
    background: linear-gradient(135deg, var(--accent-2), #ffb700);
    color: #001a33;
    border-color: var(--accent-2);
    box-shadow: 0 4px 15px rgba(255, 213, 74, 0.2)
}

.tab-btn.active.lab-active {
    background: linear-gradient(135deg, var(--accent), #51ffb4);
    color: #001a33;
    border-color: var(--accent);
    box-shadow: 0 4px 15px rgba(0, 238, 255, 0.2)
}

.tab-content {
    display: none
}

.tab-content.active {
    display: block
}

#syllabus-content .subject-card>h2 {
    display: block !important
}

.theory-heading {
    color: var(--accent-2)
}

.lab-heading {
    color: var(--accent)
}

#credits-toggle {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-bottom: 0
}

#credits-toggle .chevron-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
    stroke: var(--accent)
}

#credits-toggle.active .chevron-icon {
    transform: rotate(180deg)
}

#credits-table-container {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out
}

#credits-table-container.expanded {
    max-height: 1000px;
    transition: max-height 0.2s ease-in
}

.search-youtube-button {
    background: rgba(255, 0, 0, 0.068);
    color: rgb(255, 39, 39);
    border: 1px solid rgba(255, 0, 0, 0.664);
    border-radius: 4px;
    padding: 2px 5px;
    padding-top: 1px;
    font-size: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    white-space: nowrap;
    font-family: inherit;
    margin-left: 3px
}

.ask-ai-topic-button {
    background: linear-gradient(135deg, rgba(0, 238, 255, .1), rgba(0, 238, 255, .07));
    color: var(--accent);
    border: 1px solid rgba(0, 238, 255, .25);
    border-radius: 4px;
    padding: 2px 5px;
    padding-top: 1px;
    font-size: 10px;
    font-weight: 400;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    white-space: nowrap;
    font-family: inherit
}

* {
    -webkit-tap-highlight-color: transparent
}

#goToTopBtn {
    position: fixed;
    bottom: 30px;
    right: 20px;
    z-index: 999;
    width: 50px;
    height: 50px;
    background-color: #3333338e;
    color: rgb(0, 217, 255);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out, background-color 0.3s
}

#goToTopBtn:hover {
    background-color: #555
}

#goToTopBtn.show {
    opacity: 1;
    visibility: visible
}

.mark-complete-button {
    background: rgba(0, 255, 13, 0.068);
    color: rgba(39, 255, 64, 0.802);
    border: 1px solid rgba(0, 255, 60, 0.544);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    font-family: inherit;
    margin-left: 3px;
    padding: 2px 5px;
    padding-top: 1px;
    font-size: 10px;
    font-weight: 400;
    white-space: nowrap
}

.unit-topics>li.topic-completed,
.lab-card>ol>li.topic-completed,
.lab-card>ul>li.topic-completed {
    opacity: 0.2
}

.topic-completed .mark-complete-button {
    background: rgb(0, 255, 30);
    color: #000000;
    border-color: rgb(0, 255, 0)
}