:root {
    --bg-dark: #0f172a;
    --bg-sidebar: #1e293b;
    --bg-editor: #020617;
    --text-primary: #ffffff;
    --text-dim: #cbd5e1;
    --accent-blue: #38bdf8;
    --accent-pink: #f472b6;
    --accent-green: #4ade80;
    --accent-gold: #fbbf24;
    --danger: #f87171;
    --editor-font: 'Fira Code', monospace;
    --main-font: 'Outfit', sans-serif;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

/* Sticky Mobile Header */
#mobile-header {
    display: none;
    height: 60px;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--glass-border);
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
}

#menu-toggle {
    background: transparent;
    border: none;
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px 0;
}

#menu-toggle .bar {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: 0.3s;
}

.mobile-actions {
    display: flex;
    gap: 12px;
}

#mobile-run-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-green);
    border: none;
    color: #000;
    font-weight: 900;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 0 15px rgba(74, 222, 128, 0.4);
}

#app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
#sidebar {
    width: 320px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    padding: 24px;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo-icon {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.5));
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-dim);
    margin-bottom: 16px;
}

.mission-cards {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 40px;
}

.mission-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    color: var(--text-primary);
}

.mission-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(4px);
}

.mission-card.active {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--accent-blue);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.mission-card .icon {
    font-size: 1.5rem;
}

.completion-badge {
    margin-left: auto;
    width: 24px;
    height: 24px;
    background: var(--success);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 0.8rem;
    opacity: 0;
    transform: scale(0);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.mission-card.completed .completion-badge {
    opacity: 1;
    transform: scale(1);
}

/* Level 2 Teaser */
.dimmed {
    opacity: 0.3;
    pointer-events: none;
    filter: grayscale(1);
}

.locked-section h2 {
    color: #444;
}

#grand-victory-overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.95);
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    backdrop-filter: blur(10px);
}

.grand-victory-content {
    background: linear-gradient(135deg, #1e293b, #020617);
    padding: 60px;
    border-radius: 32px;
    border: 2px solid var(--accent-gold);
    box-shadow: 0 0 100px rgba(251, 191, 36, 0.3);
    animation: victory-pop 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.fireworks {
    font-size: 3rem;
    margin-bottom: 20px;
}

.mega-icon {
    font-size: 5rem;
    display: block;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 20px var(--accent-gold));
}

.grand-victory-content h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--accent-gold), #fff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

#close-grand-victory {
    margin-top: 32px;
    background: var(--accent-gold);
    color: #000;
    border: none;
    padding: 12px 32px;
    border-radius: 12px;
    font-weight: 800;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.2s;
}

#close-grand-victory:hover {
    transform: scale(1.05);
}

@keyframes victory-pop {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.mission-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 2px;
}

/* Objectives & Victory */
#objectives-container {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.objective-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: all 0.3s;
}

.objective-item.done {
    background: rgba(74, 222, 128, 0.1);
    border-color: rgba(74, 222, 128, 0.2);
    color: var(--success);
}

.check-circle {
    width: 18px;
    height: 18px;
    border: 2px solid var(--text-dim);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    color: transparent;
    transition: all 0.3s;
}

.objective-item.done .check-circle {
    border-color: var(--success);
    background: var(--success);
    color: #000;
    transform: scale(1.1);
}

#victory-modal {
    margin-top: 24px;
    padding: 20px;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border: 2px solid var(--accent-gold);
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 0 30px rgba(251, 191, 36, 0.2);
    animation: victory-slide 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.victory-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 10px;
}

@keyframes victory-slide {
    0% { transform: translateY(20px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

#sidebar.victory {
    box-shadow: inset 0 0 50px rgba(251, 191, 36, 0.1);
}

.hidden {
    display: none !important;
}

.cheat-sheet ul {
    list-style: none;
}

.cheat-sheet li {
    font-size: 0.9rem;
    margin-bottom: 12px;
    color: var(--text-dim);
}

.cheat-sheet code {
    background: rgba(0,0,0,0.3);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--accent-green);
    font-family: var(--editor-font);
    font-weight: 600;
}

/* Main Editor Area */
#editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-editor);
}

.editor-header {
    height: 60px;
    background: #000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid var(--glass-border);
}

.editor-tabs {
    display: flex;
}

.tab {
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
    border-right: 1px solid var(--glass-border);
}

.tab.active {
    color: var(--accent-blue);
    background: var(--bg-editor);
    box-shadow: inset 0 2px 0 var(--accent-blue);
}

.editor-actions {
    display: flex;
    gap: 12px;
}

#run-btn {
    background: linear-gradient(135deg, #0ea5e9 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 8px 20px;
    font-weight: 800;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    transition: all 0.2s;
}

#run-btn:hover {
    filter: brightness(1.1);
    transform: scale(1.02);
}

#run-btn:active {
    transform: scale(0.98);
}

#clear-btn {
    background: transparent;
    border: 1px solid #444;
    color: var(--text-dim);
    border-radius: 8px;
    padding: 8px 16px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
}

#clear-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

/* Code Input */
.code-editor-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    overflow: hidden;
}

.line-numbers {
    width: 50px;
    background: #020617;
    padding: 24px 0;
    text-align: center;
    color: #334155;
    font-family: var(--editor-font);
    font-size: 1.1rem; /* Matched to editor */
    line-height: 1.6; /* Matched to editor */
    border-right: 1px solid rgba(255,255,255,0.05);
    user-select: none;
    display: flex;
    flex-direction: column;
}

.line-numbers span {
    display: block;
}

#code-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--editor-font);
    font-size: 1.1rem;
    line-height: 1.6;
    padding: 24px;
    resize: none;
    caret-color: var(--accent-blue);
    position: relative;
    z-index: 2;
}

#code-highlight {
    position: absolute;
    top: 0;
    left: 50px;
    bottom: 0;
    right: 0;
    padding: 24px;
    font-family: var(--editor-font);
    font-size: 1.1rem;
    line-height: 1.6;
    pointer-events: none;
    color: transparent;
    white-space: pre-wrap;
}

/* World Area (Canvas) */
#output-header {
    height: 40px;
    background: #000;
    padding: 0 20px;
    display: flex;
    align-items: center;
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

#canvas-container {
    height: 300px;
    background: #000;
    position: relative;
    overflow: hidden;
}

#playground-canvas {
    width: 100%;
    height: 100%;
}

/* Console */
#console-area {
    height: 120px;
    background: #020617;
    border-top: 1px solid var(--glass-border);
    padding: 16px 24px;
    font-family: var(--editor-font);
    overflow-y: auto;
}

#console-output {
    color: var(--text-dim);
    font-size: 0.9rem;
    white-space: pre-wrap;
}

#console-output.error {
    color: var(--danger);
}

#console-output.log {
    color: var(--accent-blue);
}

.log-entry {
    margin-bottom: 4px;
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 5px;
}
/* Responsive Logic */
.mobile-only {
    display: none;
}

#close-menu {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    body {
        overflow: auto;
    }

    #mobile-header {
        display: flex;
    }

    #app-container {
        flex-direction: column;
        height: auto;
        min-height: calc(100vh - 60px);
    }

    #sidebar {
        position: fixed;
        left: -320px;
        top: 0;
        bottom: 0;
        z-index: 2000;
        box-shadow: 20px 0 50px rgba(0,0,0,0.5);
        transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        width: 300px;
    }

    #sidebar.active {
        left: 0;
    }

    #sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.6);
        backdrop-filter: blur(4px);
        z-index: 1999;
        display: none;
    }

    #sidebar-overlay.active {
        display: block;
    }

    #editor-area {
        height: auto;
    }

    .desktop-only {
        display: none !important;
    }

    .mobile-only {
        display: flex;
    }

    /* View Switcher */
    #view-switcher {
        background: #000;
        height: 50px;
        display: flex;
        border-bottom: 1px solid var(--glass-border);
    }

    .view-tab {
        flex: 1;
        background: transparent;
        border: none;
        color: var(--text-dim);
        font-weight: 800;
        font-size: 0.75rem;
        letter-spacing: 1px;
        cursor: pointer;
        position: relative;
    }

    .view-tab.active {
        color: var(--accent-blue);
    }

    .view-tab.active::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 20%;
        right: 20%;
        height: 2px;
        background: var(--accent-blue);
        box-shadow: 0 -2px 10px var(--accent-blue);
    }

    .view-section {
        display: none;
        flex: 1;
        min-height: calc(100vh - 110px);
    }

    .view-section.active {
        display: flex;
        flex-direction: column;
    }

    #canvas-container {
        height: calc(100vw * 0.75); /* Fixed aspect ratio for mobile view */
        max-height: 400px;
    }

    #console-area {
        flex: 1;
        height: auto;
        min-height: 150px;
    }

    .code-editor-wrapper {
        height: calc(100vh - 110px);
    }
}