@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700;900&display=swap');
:root {
    --void: #0a0a0a;
    --surface: #ffffff;
    --text-main: #0a0a0a;
    --text-dim: #666666;
    --accent: #77BBA2;
    --accent-orange: #e0a030;
    --border: #0a0a0a;
    --bg: #ffffff;
    --topbar-h: 56px;
}
body, .app {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    margin: 0;
}
h1, h2, h3 {
    font-weight: 900;
    letter-spacing: -1px;
    text-transform: uppercase;
    margin: 0 0 15px 0;
}
#app-topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-h);
    background: var(--surface);
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    z-index: 200;
    padding: 0 20px;
    gap: 0;
    box-sizing: border-box;
}
.topbar-left {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
}
.topbar-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 10px;
    pointer-events: none;
}
.topbar-logo {
    width: 24px;
    height: 24px;
}
.topbar-wordmark {
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 4px;
    color: var(--text-main);
    text-transform: uppercase;
}
.topbar-right {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}
.tb-btn {
    background: transparent;
    border: none;
    box-shadow: none;
    color: var(--text-dim);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    padding: 6px 14px;
    height:58px;
    cursor: pointer;
    border-radius: 0;
    border-bottom: 2px solid transparent;
    transition: color 0.15s;
    white-space: nowrap;
}
.tb-btn:hover {
    height:58px;
    color: var(--text-main);
}
.tb-btn:active {
    height:58px;
    transform: none;
    box-shadow: none;
}
.tb-btn.tb-active {
    color: var(--text-main);
    border-bottom-color: var(--accent);
    height:58px;
}
.tb-dropdown-wrap {
    position: relative;
}
.tb-dropdown {
    position: absolute;
    top:calc(100%);
    left: 0;
    background: var(--surface);
    border: 1px solid #dddddd;
    min-width: 220px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    z-index: 300;
    padding: 6px 0;
    display: none;
}
.tb-dropdown.open {
    display: block;
    animation: dropIn 0.15s ease;
}
@keyframes dropIn {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}
.tb-dd-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--text-dim);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: background 0.1s, color 0.1s;
    white-space: nowrap;
    border-left: 3px solid transparent;
}
.tb-dd-item:hover {
    background: #f5f5f5;
    color: var(--text-main);
    border-left-color: var(--accent);
}
.tb-dd-item .dd-progress-bar {
    flex: 1;
    height: 3px;
    background: #eeeeee;
    margin-top: 4px;
    position: relative;
}
.tb-dd-item .dd-progress-fill {
    height: 100%;
    background: var(--accent);
    transition: width 0.6s ease;
}
.tb-dd-inner {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}
.tb-dd-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tb-dd-pct {
    font-size: 10px;
    color: var(--accent);
    font-weight: 700;
    margin-top: 3px;
    letter-spacing: 1px;
}
.tb-dd-separator {
    height: 1px;
    background: #eeeeee;
    margin: 5px 0;
}
.tb-dd-empty {
    padding: 10px 16px;
    color: #999999;
    font-size: 11px;
    font-family: monospace;
}
.tb-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 900;
    color: #ffffff;
    cursor: pointer;
    flex-shrink: 0;
    transition: opacity 0.15s;
}
.tb-avatar:hover {opacity: 0.8;}
.tb-dropdown-wrap.right .tb-dropdown {left: auto;right:0;}
.app {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    flex-direction: column;
}
.workspace {
    flex-grow: 1;
    background-color: var(--bg);
    color: var(--text-main);
    padding: 0px 0px;
    overflow-y: auto;
    overflow-x: hidden;
    height: calc(100vh - var(--topbar-h));
    margin-top: var(--topbar-h);
    box-sizing: border-box;
}
body.lesson-active .workspace { padding: 0px 0px; }
body.lesson-active #app-topbar { pointer-events: none; opacity: 0.7; }

.hide {
    display:none !important;
}

.disabled {
    pointer-events: none !important;
    opacity: 0.7
}

.topbar-return-btn {
    display:block;
    padding: 11px 20px;
    color:var(--accent,#0a0a0a);
    text-decoration: none;
    font-size: 12px;
    letter-spacing: 0.3px;
    font-family: `Courier New`, Courier, monospace;
    background: transparent;
    border:none;
    cursor: pointer;
    font-weight: bold;
}

.topbar-return=btn {
    background-color: var(--void, #f0f0f0);
}

.view-layer {
    width: 100%;
    max-width: 100vw;
    margin: 0 auto;
    padding: 40px;
    background: var(--surface);
    animation: fadeIn 0.3s ease;
    box-sizing: border-box;
}
#view-syllabus {
    padding:0px;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.explorer-view {
    max-width:1440px;
    margin: 0 auto;
    padding 0;
}
.explorer-title-block {
    margin-bottom: 22px;
    padding-bottom:14px;
    border-bottom:1px solid #dddddd;
}
.explorer-kicker {
    display:block;
    font-family: monospace;
    font-size:11px;
    font-weight: 700;
    letter-spacing:2px;
    text-transform:uppercase;
    color: var(--text-dim);
    margin:20px 0px 8px 0px;
}
.explorer-title {
    font-size:38px;
    font-weight: 900;
    letter-spacing:-1.5px;
    text-transform: uppercase;
    margin:0;
}
.explorer-header {
    margin-bottom: 48px;
    border-bottom: 1px solid #dddddd;
    padding-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 12px;
}
.category-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.filters-row {
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap: 22px;
    margin-bottom: 22px;
}
.filter-btn, .diff-btn {
    padding: 0;
    margin: 0;
    background: none;
    border: none;
    box-shadow: none;
    color: var(--text-dim, #888888);
    cursor: pointer;
    font-family:monospace;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    border-bottom: 2px solid transparent;
    padding-bottom:3px;
    transition: color 0.12s ease, border-color 0.12s ease;
}
.filter-btn:hover, .diff-btn:hover {
    color: var(--text-main);
}
.filter-btn:active, .diff-btn:active { transform: none; }
.filter-btn.active, .diff-btn.active {
    color: var(--text-main);
    border-bottom-color: var(--accent);
}
#search-bar {
    padding: 14px 16px;
    background-color: var(--surface);
    color: var(--text-main);
    border: 1px solid #dddddd;
    font-family: monospace;
    font-size: 14px;
    font-weight: bold;
    outline: none;
    width: 250px;
    box-shadow: none;
}
#search-bar:focus { border-color: var(--accent); }
#search-bar::placeholder { color: var(--text-dim); }
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap:18px;
    margin-top: 24px;
}
.course-card, .practice-card {
    background-color: var(--surface);
    border: 1px solid #dddddd;
    padding: 18px;
    display: flex;
    flex-direction: column;
    box-shadow: none;
    transition: border-color 0.15s ease;
}
.course-card:hover, .practice-card:hover {
    border-color: var(--accent);
}
.course-card h3, .practice-card h3 { margin-bottom: 8px; font-size: 20px; }
.course-card p {
    color: var(--text-main);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom:16px;
    flex-grow: 1;
}
.syllabus-meta {
    margin-bottom: 32px;
    padding: 20px;
    border-bottom: 1px solid #dddddd;
}
.syllabus-meta h1 {
    font-size: 36px;
    margin-bottom: 12px;
}
.syllabus-sections-grid {
    padding:0px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 16px;
    margin-top: 8px;
}
@media (max-width: 700px) {
    .syllabus-sections-grid { grid-template-columns: 1fr; }
}
.sec-card {
    border: 3px solid var(--border);
    background: var(--surface);
    box-shadow: 5px 5px 0px var(--border);
    overflow: hidden;
    transition: box-shadow 0.2s;
}
.sec-card:hover { box-shadow: 7px 7px 0px var(--accent); }
.sec-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--border);
    color: var(--surface);
    cursor: pointer;
    user-select: none;
    gap: 10px;
}
.sec-card-title {
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 2px;
    text-transform: uppercase;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sec-card-meta {
    font-size: 10px;
    color: rgba(255,255,255,0.5);
    font-family: monospace;
    white-space: nowrap;
    flex-shrink: 0;
}
.sec-card-arrow {
    font-size: 10px;
    color: rgba(255,255,255,0.6);
    flex-shrink: 0;
    transition: transform 0.2s;
}
.sec-card.open .sec-card-arrow { transform: rotate(90deg); }
.sec-card-body {
    display: none;
    border-top: 2px solid var(--border);
}
.sec-card.open .sec-card-body { display: block; }
.lesson-row {
    padding: 14px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0,0,0,0.08);
    cursor: pointer;
    transition: background-color 0.1s ease;
    gap: 10px;
}
.lesson-row:hover { background-color: #f5f5f5; }
.lesson-row:last-child { border-bottom: none; }
.lesson-title {
    color: var(--text-main);
    font-size: 13px;
    font-weight: 700;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.lesson-type-tag {
    font-size: 9px;
    font-family: monospace;
    font-weight: bold;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-dim);
    flex-shrink: 0;
}
.rating-container { position:relative; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.rating-display { display: flex; gap: 4px; flex-shrink: 0; }
.padlock-icon {
    position:absolute ;
    width: 20px;
    height:20px;
    z-index: 10;
}
#view-lesson {
    height: auto;
    display: block;
    overflow: visible;
    box-sizing: border-box;
    max-width: 100%;
}
.lesson-workspace {
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    height: auto;
    overflow: visible;
    padding-bottom: 80px;
    box-sizing: border-box;
}
#course-header {
    width: 100%;
    background-color: var(--bg);
    margin-bottom: 32px;
    padding-bottom: 18px;
    border-bottom: 4px solid var(--border);
    font-size: 12px;
    font-weight: 900;
    color: var(--text-main);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
#module-content {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 100%;
    overflow-wrap: break-word;
    word-wrap: break-word;
    box-sizing: border-box;
}
#module-content p { margin-bottom: 20px; }
#module-content code {
    font-family: monospace;
    font-size: 14px;
    font-weight: bold;
    background-color: #f0f0f0;
    color: var(--text-main);
    border: 2px solid var(--border);
    padding: 2px 6px;
}
#module-content pre {
    background-color: var(--text-main);
    color: var(--surface);
    padding: 20px;
    border: 4px solid var(--border);
    overflow-x: auto;
    font-family: monospace;
    font-size: 14px;
    line-height: 1.8;
    margin: 20px 0;
    box-shadow: 6px 6px 0px var(--accent);
    max-width: 100%;
    box-sizing: border-box;
}
#module-content pre code { background: none; border: none; padding: 0; color: inherit; }
.mcq-option {
    display: block;
    width: 100%;
    margin: 12px 0;
    padding: 18px 20px;
    background-color: var(--bg);
    border: 3px solid var(--border);
    color: var(--text-main);
    cursor: pointer;
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-weight: 700;
    font-size: 16px;
    text-align: left;
    box-shadow: 4px 4px 0px var(--border);
    transition: transform 0.1s, box-shadow 0.1s;
    box-sizing: border-box;
    white-space: normal;
    overflow-wrap: break-word;
    word-wrap: break-word;
    max-width: 100%;
}
.mcq-option:hover:not(.locked) {
    transform: translate(2px,2px);
    box-shadow: 2px 2px 0px var(--accent);
    border-color: var(--accent);
}
.mcq-option:active:not(.locked) { transform: translate(4px,4px); box-shadow: none; }
.mcq-option.locked { cursor: default; opacity: 0.65; box-shadow: none; transform: translate(4px,4px); }
.mcq-option.reveal-correct  { border-color: var(--accent); background-color: rgba(119,187,162,0.2); }
.mcq-option.reveal-incorrect { border-color: #ff4444; background-color: rgba(255,68,68,0.1); }
.challenge-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    height: 400px;
    margin-top: 24px;
    max-width: 100%;
    box-sizing: border-box;
}
.challenge-prompt {
    background-color: var(--surface);
    padding: 24px;
    border: 3px solid var(--border);
    font-size: 15px;
    line-height: 1.8;
    overflow-y: auto;
    box-shadow: 4px 4px 0px var(--border);
    box-sizing: border-box;
    overflow-wrap: break-word;
    word-wrap: break-word;
}
.challenge-editor-wrapper { display: flex; flex-direction: column; }
.challenge-editor {
    flex-grow: 1;
    background-color: var(--text-main);
    color: var(--surface);
    border: 3px solid var(--border);
    padding: 20px;
    font-family: monospace;
    font-size: 14px;
    resize: none;
    outline: none;
    line-height: 1.8;
    box-shadow: 4px 4px 0px var(--accent);
    white-space: pre;
    overflow-x: auto;
    overflow-wrap: normal;
    word-wrap: normal;
}
.challenge-console {
    margin-top: 15px;
    color: #ff4444;
    font-size: 14px;
    min-height: 20px;
    font-family: monospace;
    font-weight: bold;
}
.preview-wrapper { display: flex; flex-direction: column; height: 100%; }
.preview-frame {
    flex-grow: 1;
    width: 100%;
    border: 3px solid var(--border);
    background-color: #ffffff;
    box-shadow: 4px 4px 0px var(--border);
    box-sizing: border-box;
}
.preview-label {
    font-size: 10px;
    font-family: monospace;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
    color: var(--text-dim);
}
.explanation-box {
    margin-top: 30px;
    padding: 20px 25px;
    background-color: var(--surface);
    border: 3px solid var(--border);
    border-left: 10px solid var(--accent);
    color: var(--text-main);
    font-size: 15px;
    line-height: 1.8;
    animation: fadeIn 0.3s ease;
    box-shadow: 6px 6px 0px rgba(0,0,0,0.05);
}
button {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    text-transform: uppercase;
    font-weight: 900;
    letter-spacing: 1px;
    cursor: pointer;
    background-color: var(--surface);
    color: var(--text-main);
    border: 2px solid var(--border);
    padding: 12px 20px;
    box-shadow: 4px 4px 0px var(--border);
    transition: transform 0.1s, box-shadow 0.1s, background-color 0.2s;
}
button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
    transform: translate(4px,4px);
}
#lesson-action-btn, #lesson-read-btn, .controls button {
    background-color: var(--accent);
    color: #ffffff;
    box-shadow: 4px 4px 0px var(--border);
}
.controls {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
    width: 100%;
    background-color: var(--bg);
}
.danger-btn { color: #ff4444; border-color: var(--border); }
.danger-btn:hover:not(:disabled) { background-color: #ff4444; color: #ffffff; }
.blue-btn { color: #77BBA2; border-color: var(--border); }
.blue-btn:hover:not(:disabled) { background-color: #77BBA2; color: #ffffff; }
.card-btn-group button, .curriculum-action-btn, .practice-btn-group button, #request-wipe-btn, #execute-wipe-btn {
    border-width: 1px;
    box-shadow: none;
}
.card-btn-group button:active, .curriculum-action-btn:active, .practice-btn-group button:active, #request-wipe-btn:active, #execute-wipe-btn:active {
    transform: none !important;
}
.lesson-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 20px;
    margin-top: 48px;
    padding-top: 20px;
    border-top: 4px solid var(--border);
}
.progress-dots { display: flex; gap: 8px; }
.p-dot {
    width: 12px;
    height: 12px;
    border: 2px solid var(--border);
    background-color: var(--surface);
}
.p-dot.active    { border-color: var(--accent); background-color: transparent; }
.p-dot.correct   { background-color: var(--accent); border-color: var(--accent); }
.p-dot.incorrect { background-color: var(--border); border-color: var(--border); }
.course-progress-wrapper {
    margin-top: 8px;
    width: 100%;
    height: 8px;
    background-color: #e8e8e8;
    border: none;
}
.course-progress-fill {
    height: 100%;
    background-color: var(--accent);
    border-right: none;
    width: 0%;
    transition: width 0.8s cubic-bezier(0.2,0.8,0.2,1);
}
.practice-btn-group { display: flex; gap: 15px; margin-top: auto; }
.practice-btn-group button { flex: 1; }
.strike-dot {
    width: 14px;
    height: 14px;
    background-color: transparent;
    border: 2px solid var(--border);
}
.strike-dot.lost { background-color: #ff4444; border-color: var(--border); }
.master-test-row {
    margin-top: 24px;
    grid-column: 1 / -1;
    padding: 22px;
    border: 1px solid #dddddd;
    background-color: var(--surface);
    text-align: center;
    cursor: pointer;
    box-shadow: none;
    transition: border-color 0.15s;
}
.master-test-row:hover  { border-color: var(--accent); }
.master-test-row:active { border-color: var(--accent); }
.master-test-title { font-size: 18px; font-weight: 900; text-transform: uppercase; }
.master-subtitle { font-size: 13px; color: var(--accent); margin-top: 6px; font-weight: bold; }
.danger-zone {
    margin-top: 40px;
    border: 1px solid #ff4444;
    background-color: rgba(255,68,68,0.05);
    padding: 30px;
    box-shadow: none;
}
.danger-zone h3 { color: #ff4444; margin-bottom: 15px; }
#wipe-confirm-input {
    padding: 14px;
    border:1px solid #ff4444;
    font-family: monospace;
    font-size: 16px;
    outline: none;
    background: #ffffff;
    color: #ff4444;
    font-weight: bold;
    box-shadow: none;
    width: 100%;
    max-width: 300px;
    margin-bottom: 20px;
}
.b-enroll-btn {
    flex: 1;
    background-color: var(--void) !important;
    color: var(--surface) !important;
    border: none !important;
    box-shadow: none !important;
}
.b-enroll-btn:hover { background-color: var(--accent) !important; color: #ffffff !important; }
.fb-code-block {
    background: var(--void);
    color: var(--surface);
    font-family: monospace;
    font-size: 14px;
    line-height: 2;
    padding: 20px 24px;
    border: 4px solid var(--border);
    box-shadow: 6px 6px 0px var(--accent);
    margin-bottom: 24px;
    white-space: pre-wrap;
}
.fb-code-text { color: var(--surface); }
.fb-input {
    background: #2a2a2a;
    color: #ffffff;
    border: none;
    border-bottom: 2px solid var(--accent);
    font-family: monospace;
    font-size: 14px;
    padding: 2px 6px;
    outline: none;
    width: 120px;
    text-align: center;
    margin: 0 4px;
}
.fb-input:focus { border-bottom-color: #ffffff; background: #333333; }
.fb-correct { border-bottom-color: var(--accent) !important; color: var(--accent) !important; }
.fb-wrong { border-bottom-color: #ff4444 !important; color: #ff4444 !important; text-decoration: line-through; }
.sb-hint {
    font-size: 12px;
    font-family: monospace;
    color: var(--text-dim);
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.sb-code-block {
    border: 4px solid var(--border);
    box-shadow: 6px 6px 0px var(--border);
    overflow: hidden;
    margin-bottom: 24px;
    background: var(--void);
}
.sb-line {
    display: flex;
    align-items: stretch;
    cursor: pointer;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    transition: background 0.1s;
}
.sb-line:last-child { border-bottom: none; }
.sb-line:hover { background: rgba(255,255,255,0.06); }
.sb-line.sb-selected { background: rgba(119,187,162,0.15); border-left: 3px solid var(--accent); }
.sb-line.sb-reveal-correct { background: rgba(119,187,162,0.2); border-left: 4px solid var(--accent); }
.sb-line.sb-reveal-wrong { background: rgba(255,68,68,0.15); border-left: 4px solid #ff4444; }
.sb-num {
    width: 40px;
    flex-shrink: 0;
    text-align: right;
    padding: 8px 10px;
    color: #555555;
    font-family: monospace;
    font-size: 13px;
    background: #1a1a1a;
    border-right: 1px solid #2a2a2a;
    user-select: none;
}
.sb-code { padding: 8px 16px; font-family: monospace; font-size: 13px; color: #d4d4d4; white-space: pre; flex: 1; }
.proj-wrap {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 120px);
    min-height: 560px;
    border: 4px solid var(--border);
    box-shadow: 8px 8px 0px var(--border);
    background: var(--bg);
    overflow: hidden;
}
.proj-topbar {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--border);
    padding: 8px 14px;
    flex-shrink: 0;
    flex-wrap: wrap;
    min-height: 48px;
}
.proj-title {
    color: var(--surface);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 1px;
    text-transform: uppercase;
    white-space: nowrap;
    margin-right: 4px;
}
.proj-tabs { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.proj-tab {
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.6);
    border: 1px solid rgba(255,255,255,0.15);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    cursor: pointer;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: none;
    transition: background 0.1s, color 0.1s;
    white-space: nowrap;
}
.proj-tab:hover { background: rgba(255,255,255,0.15); color: #ffffff; }
.proj-tab:active { transform: none; box-shadow: none; }
.proj-tab.proj-tab-active { background: var(--surface); color: var(--text-main); border-color: var(--surface); }
.proj-tab.proj-tab-done { background: rgba(119,187,162,0.25); color: var(--accent); border-color: var(--accent); }
.proj-tab.proj-tab-active.proj-tab-done { background: var(--accent); color: #ffffff; border-color: var(--accent); }
.proj-topbar-actions { display: flex; gap: 6px; }
.proj-action-btn {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 6px 14px;
    cursor: pointer;
    background: rgba(255,255,255,0.1);
    color: #ffffff;
    border: 1px solid rgba(255,255,255,0.25);
    box-shadow: none;
    white-space: nowrap;
    transition: background 0.1s;
}
.proj-action-btn:hover { background: rgba(255,255,255,0.2); }
.proj-action-btn:active { transform: none; box-shadow: none; }
.proj-action-btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none; box-shadow: none; }
.proj-action-accent { background: var(--accent); border-color: var(--accent); color: #ffffff; }
.proj-action-accent:hover { background: #66aa91; }
.proj-action-run { background: #2a2a2a; border-color: #444444; color: var(--accent); }
.proj-action-run:hover { background: #333333; }
.proj-body {
    display: grid;
    grid-template-columns: 1fr 320px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}
.proj-editor-col {
    display: flex;
    flex-direction: column;
    border-right: 3px solid var(--border);
    min-height: 0;
    overflow: hidden;
}
.proj-editor-label {
    background: #1a1a1a;
    color: #555555;
    font-family: monospace;
    font-size: 11px;
    padding: 5px 12px;
    letter-spacing: 2px;
    flex-shrink: 0;
}
.proj-editor-wrap { display: flex; flex: 1; min-height: 0; overflow: hidden; }
.proj-line-numbers {
    background: #1a1a1a;
    color: #555555;
    font-family: monospace;
    font-size: 13px;
    line-height: 1.55;
    padding: 10px 8px;
    text-align: right;
    user-select: none;
    overflow-y: hidden;
    overflow-x: hidden;
    white-space: pre;
    pointer-events: none;
    min-width: 36px;
    border-right: 1px solid #2a2a2a;
    flex-shrink: 0;
}
.proj-editor {
    flex: 1;
    background: var(--void);
    color: #d4d4d4;
    font-family: monospace;
    font-size: 13px;
    line-height: 1.55;
    padding: 10px 12px;
    border: none;
    outline: none;
    resize: none;
    white-space: pre;
    overflow-x: auto;
    overflow-y: auto;
    overflow-wrap: normal;
    word-wrap: normal;
}
.proj-right-col {
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    background: var(--surface);
}
.proj-preview-label {
    background: var(--border);
    color: var(--surface);
    font-size: 10px;
    font-family: monospace;
    font-weight: bold;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 5px 12px;
    flex-shrink: 0;
}
.proj-frame { flex: 1; min-height: 0; width: 100%; border: none; border-bottom: 2px solid var(--border); background: #ffffff; }
.proj-console-label {
    background: #1a1a1a;
    color: #555555;
    font-size: 10px;
    font-family: monospace;
    font-weight: bold;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 4px 12px;
    flex-shrink: 0;
}
.proj-console {
    background: var(--void);
    color: var(--text-dim);
    font-family: monospace;
    font-size: 12px;
    padding: 10px 14px;
    flex: 0 0 120px;
    overflow-y: auto;
    line-height: 1.7;
}
.proj-instr-bar { background: var(--surface); border-top: 3px solid var(--border); flex-shrink: 0; max-height: 120px; overflow-y: auto; }
.proj-instr-inner {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 16px;
    flex-wrap: wrap;
}
.proj-instr-label { font-size: 10px; font-weight: 900; letter-spacing: 2px; text-transform: uppercase; color: var(--text-dim); white-space: nowrap; flex-shrink: 0; }
.proj-instr-title { font-size: 13px; font-weight: 900; text-transform: uppercase; color: var(--text-main); white-space: nowrap; flex-shrink: 0; }
.proj-instr-text { font-size: 13px; color: var(--text-main); line-height: 1.6; font-family: monospace; flex: 1; min-width: 200px; }
.proj-instr-done { font-size: 10px; font-weight: 900; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent); padding: 2px 8px; white-space: nowrap; flex-shrink: 0; }
.diff-badge {
    display: inline-block;
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 2px 7px;
    border: 1px solid var(--border);
    margin-left: 8px;
    vertical-align: middle;
    opacity: 0.6;
}
.diff-badge.beginner     { border-color: var(--accent); color: var(--accent); }
.diff-badge.intermediate { border-color: var(--accent-orange); color: var(--accent-orange); }
.diff-badge.advanced     { border-color: #ff4444; color: #ff4444; }
.hub-tab {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid #dddddd;
    color: var(--text-dim);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    box-shadow: none;
    transition: background 0.1s, color 0.1s;
}
.hub-tab:first-child { border-right: none; }
.hub-tab.active { background: var(--void); color: var(--surface); box-shadow: none; }
.hub-tab:active { transform: none; box-shadow: none; }
.theme-swatch {
    padding: 8px 18px;
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 3px 3px 0px rgba(0,0,0,0.2);
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: transform 0.1s, box-shadow 0.1s;
}
.theme-swatch.active-theme { outline: 3px solid var(--accent); outline-offset: 2px; }
.theme-swatch:active { transform: translate(2px,2px); box-shadow: none; }
.rating-dot.mastery {
    background-color: #f5c842;
    border-color: #c9a200;
    clip-path: polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);
}
.rating-star {
    width: 10px;
    height: 10px;
    background-color: #f5c842;
    border: none;
    clip-path: polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);
    display: inline-block;
}
.mastery-badge {
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #c9a200;
    margin-left: 6px;
    vertical-align: middle;
}
.practice-settings {
    margin-top: 12px;
    padding: 12px;
    border: 1px solid #dddddd;
    background: var(--bg);
    font-size: 12px;
}
.practice-settings-title {
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 8px;
}
.practice-settings label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 5px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}
.docs-course-group { margin-bottom: 32px; }
.docs-course-title {
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-dim);
    border-bottom: 2px solid var(--border);
    padding-bottom: 8px;
    margin-bottom: 12px;
}
.docs-lesson-row {
    padding: 12px 16px;
    border: 2px solid var(--border);
    margin-bottom: 6px;
    cursor: pointer;
    transition: background 0.1s, border-color 0.1s;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.docs-lesson-row:hover { background: var(--bg); border-color: var(--accent); }
.docs-lesson-title { font-size: 14px; font-weight: 700; }
.docs-lesson-meta { font-size: 11px; color: var(--text-dim); font-family: monospace; }
.public-course-card {
    background: var(--surface);
    border: 1px solid #dddddd;
    padding: 24px;
    transition: border-color 0.15s;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.public-course-card:hover{border-color:var(--accent);}
.public-course-card h3 { margin: 0; font-size: 20px; }
.public-course-card p {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-dim);
    flex-grow: 1;
    margin: 0;
}
.public-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
    padding-top: 10px;
    border-top: 1px solid #dddddd;
}
.public-card-meta { font-size: 11px; font-family: monospace; color: var(--text-dim); }
.bundle-header {
    padding: 14px 20px;
    background: var(--bg);
    border: 2px solid var(--border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2px;
    font-weight: 700;
    font-size: 14px;
    transition: background 0.1s;
}
.bundle-header:hover { background: #f0f0f0; }
.bundle-header .bundle-arrow { font-size: 12px; color: var(--text-dim); }
.bundle-lessons { border: 2px solid var(--border); border-top: none; margin-bottom: 12px; }
.course-home-card {
    background: var(--surface);
    border: 1px solid #dddddd;
    padding: 24px;
    box-shadow: none;
    cursor: pointer;
    transition: border-color 0.15s;
    display: flex;
    flex-direction: column;
}
.course-home-card:hover {
    border-color: var(--accent);
}
.course-home-title {
    font-size: 18px;
    font-weight: 900;
    letter-spacing: -0.5px;
    text-transform: uppercase;
    margin-bottom: 4px;
}
.course-home-pct {
    font-size: 13px;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 2px;
}
.course-home-meta {
    font-size: 11px;
    font-family: monospace;
    color: var(--text-dim);
    margin-top: 10px;
}
#syllabus-return-btn {
    background: transparent;
    border: none;
    box-shadow: none;
    color: var(--text-dim);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    padding: 0;
    cursor: pointer;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.15s;
}
#syllabus-return-btn:hover {
    color: var(--text-main);
    box-shadow: none;
    transform: none;
}
#syllabus-return-btn:active {
    transform: none;
    box-shadow: none;
}
.syllabus-meta h1 {
    font-size: 30px;
}
#lesson-back-btn {
    top: 70px !important;
}
#errorOverlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 299;
}
#errorBox {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--surface);
    border: 4px solid var(--border);
    box-shadow: 8px 8px 0px var(--border);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    padding: 40px;
    max-width: 400px;
    width: 90%;
    z-index: 300;
    animation: errorBoxFadeIn 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
#errorBox button {
    align-self: flex-end;
}
@keyframes errorBoxFadeIn {
    from { opacity: 0; scale: 0.97; }
    to   { opacity: 1; scale: 1; }
}
#onboardingOverlay {
    z-index: 9998;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
}
#onboardingCard {
    position: fixed;
    background: var(--surface);
    border: 4px solid var(--border);
    box-shadow: 8px 8px 0px var(--border);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    padding: 40px;
    width: 280px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.onboardingFadeout {
    animation: fadeOut 0.3s ease forwards;
}
.teaching-point {
    transition: color 0.4s ease;
}
.dimmed {
    color: rgba(0,0,0,0.5);
}
.syllabus-master-detail{display:flex;gap:0;height: calc(100vh - var(--topbar-h));min-height:500px;}
.syllabus-sidebar{width:300px;min-width:300px;overflow-y:auto;border:1px solid #ddd;background:var(--surface);box-shadow:none;padding:12px;box-sizing:border-box;display:flex;flex-direction:column;gap:12px;height: 100%;}
.syllabus-content-stage{flex-grow:1;overflow-y:auto;border:1px solid #ddd;background:var(--surface);box-shadow:none;padding:30px;box-sizing:border-box;height: 100%;}
@media (max-width:900px){
.syllabus-master-detail{flex-direction:column;height:auto;}
.syllabus-sidebar{position:static;width:100%;min-width:100%;max-height:400px;}
.syllabus-content-stage{min-height:400px;margin-left:0;}
}
.syllabus-section-btn {
    padding:14px 16px;
    border: 1px solid #ddd;
    background:var(--surface);
    cursor:pointer;
    display:flex;
    flex-direction:column;
    gap: 6px;
    box-shadow:none;
    transition:border-color 0.15s;
}
.syllabus-section-btn.active { background:var(--accent);border-color:var(--accent);}
.syllabus-test-btn {border-color: var(--accent); }
.syllabus-test-btn .syllabus-section-title { color: var(--accent);}
.syllabus-section-title {
    font-size:12px;
    font-weight:900;
    text-transform: uppercase;
    color: var(--text-main);
}
.syllabus-section-meta {
    font-size:11px;
    color:var(--text-dim);
    font-family: monospace;
    display:flex;
    justify-content: space-between;
}
.syllabus-sidebar-info { padding-bottom:12px;border-bottom:1px solid #dddddd;}
.syllabus-sidebar-course-title {
    font-size:16px;
    font-weight:900;
    letter-spacing:-0.5px;
    text-transform: uppercase;
    margin-bottom:10px;
}
.syllabus-desc-link {
    display:inline-block;
    margin-top:10px;
    font-family: monospace;
    font-size:11px;
    color:var(--text-dim);
    text-decoration: underline;
    cursor: pointer;
}
.syllabus-desc-link:hover { color: var(--text-main); }
.syllabus-top-actions { display:flex;justify-content: flex-end;margin-bottom:16px; }
.syllabus-stage-header {
    margin-bottom:20px;
    color:var(--text-dim);
    font-family: monospace;
    margin:0;
}
.syllabus-lesson-list {
    display:flex;
    flex-direction:column;
    gap:10px;
}
.details-backdrop {
    position: fixed;
    inset:0;
    background:rgba(0,0,0,.6);
    display:flex;
    align-items:center;
    justify-content:center;
    padding:20px;
    z-index:10000;
}
.details-modal {
    background:var(--surface);
    border: 2px solid var(--border);
    width:100%;
    font-family: monospace;
    max-height:90vh;
    max-width:20vw;
    overflow-y:auto;
    padding: 30px;
}
.details-title {
    margin-top:0;
    border-bottom:2px dashed var(--border);
    padding-bottom:10px;
}
.details-meta-text { margin: 8px 0; }
.details-meta-list { margin: 8px 0 0 20px;padding:0;}
.details-meta-list li { margin-bottom: 4px; }
.details-desc-box {
    margin:20px 0;
    padding:15px;
    background: rgba(0,0,0,0.03);
    border-left: 4px solid var(--accent);
}
.details-desc-label {
    display: block;
    margin-bottom:8px;
    text-transform:uppercase;
    font-size:11px;
    letter-spacing:1px;
    color: var(--text-dim);
}
.details-desc-text { line-height:1.5;font-size:14px;}
.details-close-btn {
    margin-top:20px;
    width:100%;
    font-weight:bold;
    padding:12px;
    background: transparent;
    border:1px solid var(--border);
    cursor: pointer;
    text-transform: uppercase;
    box-shadow:none;
    letter-spacing:1px;
}
.card-top-content { flex-grow:1; min-height:75px;}
.card-title-clamp {
    margin-bottom:8px;
    display:-webkit-box;
    -webkit-line-clamp:3;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.card-bundle-tag {
    font-size:10px;
    color:var(--accent);
    font-weight:900;
    letter-spacing:1px;
    margin-bottom:4px;
    text-transform: uppercase;
}
.card-prog-wrapper { margin-top: auto;}
.card-prog-text {
    font-size:12px;
    margin-top:6px;
    margin-bottom:15px;
    text-align: right;
}
.card-action-wrap {display: flex;flex-direction:column;margin-top: auto; }
.card-btn-group { display:flex; gap:10px;}
.card-btn-cont {
    flex:2;
    border-color:var(--text-dim);
    color: var(--text-dim);
}
.card-details-btn {
    margin-top:2px;
    background:transparent;
    border:none;
    font-family: monospace;
    font-size:11px;
    box-shadow: none;
    font-weight:bold;
    color:var(--text-dim);
    text-decoration: underline;
    cursor:pointer;
    text-transform:uppercase;
    letter-spacing:1px;
    padding:10px 52px 4px 6px;
}
.card-footer-badge {
    font-size:10px;
    padding: 2px 6px;
    text-transform:uppercase;
}
.hub-empty-state {text-align:center;padding:60px 0; }
.hub-empty-text {
    color:var(--text-dim);
    font-family: monospace;
    margin-top:20px;
    font-size:13px;
    letter-spacing:2px;
}
.hub-banner {
    background:var(--surface);
    border: 1px solid #dddddd;
    box-shadow:none;
    padding:20px;
    font-family: monospace;
    text-align:center;
    margin-bottom:30px;
}
.hub-banner-label {
    font-size: 11px
    text-transform: uppercase;
    letter-spacing: 2px;
    color:var(--text-dim);
    margin-bottom: 6px;
}
.hub-banner-timer {
    font-size:28px;
    font-weight: 900;
    color:var(--accent);
}
.hub-banner-title {
    font-size:14px;
    font-weight:bold;
    color: var(--text-main);
}
.hub-banner-desc {
    font-size: 12px;
    color:var(--text-dim);
    margin-top:4px;
}
.practice-card-sub {font-size:14px; color: var(--text-dim);}
.practice-card-record {
    font-size: 12px;
    color:#ff4444;
    margin-top:-5px;
}
.practice-btn-surv {
    color:#ff4444;
    border-color: #ff4444;
}
.dialog-btn-container {
    display:flex;
    gap:10px;
    margin-top:15px;
    justify-content:center;
}
.not-found-container {
    text-align: center;
    padding:80px 0;
}
.not-found-image { width:25%; height:25%; }
.not-found-code {
    font-size: 48px;
    font-weight:900;
    letter-spacing: -2px;
    margin-top: 24px;
}
.not-found-text {
    color: var(--text-dim);
    font-family: monospace;
    margin-top:8px;
    letter-spacing:2px;
}
.not-found-btn { margin-top:32px; }
.less-back-fixed-btn {
    position: fixed;
    top: 70px;
    left: 24px;
    z-index: 999;
    background: var(--surface);
    color: var(--text-main);
    border: 2px solid var(--border);
    padding: 10px 16px;
    font-size: 12px;
    letter-spacing: 2px;
    box-shadow: 4px 4px 0px var(--border);
    cursor: pointer;
}
.view-loading-state {
    text-align: center;
    padding: 60px;
    color: var(--text-dim);
    font-family: monospace;
}
.lesson-complete-wrap {text-align: center;}
.lesson-complete-text {line-height:1.5;}
.lesson-complete-rating {
    color: var(--accent);
    font-size: 24px;
    margin-top:20px;
}
.lesson-complete-btn {margin-top: 40px; }
.onboarding-backdrop { position: fixed; inset:0; background: rgba(0,0,0,0.4); z-index: 9999; pointer-events: none;}
.onboarding-highlight { position: relative !important;z-index: 10000 !important;}
.dialogue-backdrop {
    position:fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    display:flex;
    align-items: center;
    justify-content: center;
}
.dialogue-box-fixed {
    position: fixed;
    z-index:10001;
    pointer-events: auto;
}
.tb-btn-return {
    font-weight: bold;
    color: var(--text-dim) !important;
}
.avatar-disabled { pointer-events: none !important; cursor: default !important; opacity: 0.5;}
.tb-dd-course-item { flex-direction: column; align-items: flex-start;gap:6px;}
.curriculum-bundle-tag { font-size: 12px; opacity: 0.5; letter-spacing: 1px;}
.curriculum-prog-wrap { margin-top: 16px;}
.curriculum-prog-text {
    font-size: 12px;
    color: var(--accent);
    font-weight:700;
    text-align:right;
    margin-top:4px;
}
.curriculum-header-actions { display: flex; gap: 10px;}
.curriculum-action-btn { font-size:12px; padding:8px 16px;}
.course-home-card.card-project {border-color: var(--accent);}
.course-home-card.card-masters { border-color: var(--accent); box-shadow:none;}
.course-home-meta-spaced { margin-top: 8px;}
.rating-dot-mastered {
    width:16px;
    height: 16px;
    background:var(--accent-orange);
    border:2px solid var(--text-main);
    display:flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
}
.rating-dot-mastered svg {
    width:16px;
    height:16px;
    fill:var(--surface);
}
.rating-dot-prog-bg {
    width:16px;
    height: 16px;
    background: transparent;
    border:2px solid var(--text-main);
    position: relative;
    overflow: hidden;
    border-radius:5px;
}
.rating-dot-prog-fill {
    position: absolute;
    left:0;
    bottom:0;
    right:0;
    background: var(--accent);
    transition:height 0.3s ease;
}
.lesson-row.locked {opacity: 0.4;}
.lesson-title-flex {display:flex; align-items: center;}
.details-sources-text {margin-top: 8px;}
.hub-empty-text.no-margin { margin-top: 0; }
.survival-record-text {color: #ff4444; font-size: 16px; display:block; margin-top: 10px;}
.public-signin-btn {
    font-size: 11px;
    padding: 10px 14px;
    width:100%;
    background-color: var(--void);
    color:var(--surface);
    border: none;
    box-shadow: none;
}
.public-signin-btn:hover{background-color:#1e1e1e;}
.public-signin-btn:active{transform:none !important;}
.wipe-btn-ready { background-color:#ff4444 !important;color:var(--void) !important;}