/* Design Tokens & Theme Variables */
:root {
    --bg-main: #040714;
    --panel-bg: rgba(8, 12, 24, 0.85);
    --border-color: rgba(255, 255, 255, 0.05);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Neon Colors */
    --color-cyan: #00f0ff;
    --color-cyan-glow: rgba(0, 240, 255, 0.3);
    --color-green: #00ff66;
    --color-green-glow: rgba(0, 255, 102, 0.3);
    --color-amber: #ffaa00;
    --color-amber-glow: rgba(255, 170, 0, 0.3);
    --color-magenta: #ff007f;
    --color-magenta-glow: rgba(255, 0, 127, 0.3);
    --color-purple: #b026ff;
    --color-purple-glow: rgba(176, 38, 255, 0.3);
    --color-red: #ff3366;
    
    /* Fonts */
    --font-mono: 'Fira Code', 'Courier New', Courier, monospace;
    --font-sans: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* CRT Scanlines Overlay */
.crt-overlay {
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.15) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
    background-size: 100% 4px, 6px 100%;
    z-index: 999;
    pointer-events: none;
    opacity: 0.75;
}

/* Layout Wrapper */
.console-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 1rem;
    max-width: 1440px;
    margin: 0 auto;
}

/* Header Styling */
.console-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
    background: var(--panel-bg);
    border-radius: 12px;
    padding: 0.8rem 1.2rem;
    margin-bottom: 0.8rem;
    backdrop-filter: blur(10px);
}

.console-header h1 {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    background: linear-gradient(135deg, #fff 30%, var(--color-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
}

.console-header .subtitle {
    font-family: var(--font-mono);
    color: var(--color-cyan);
    font-size: 0.65rem;
    letter-spacing: 2px;
    margin-top: 0.15rem;
    text-shadow: 0 0 5px var(--color-cyan-glow);
}

.btn-back {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: bold;
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid var(--border-color);
    padding: 3px 8px;
    border-radius: 4px;
    margin-bottom: 0.3rem;
    transition: 0.2s;
}

.btn-back:hover {
    border-color: var(--color-cyan);
    color: var(--color-cyan);
}

.header-controls {
    display: flex;
    gap: 0.6rem;
}

/* Buttons */
.btn-control {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.2s;
}

.btn-control:hover {
    border-color: var(--color-cyan);
    color: var(--color-cyan);
    box-shadow: 0 0 8px var(--color-cyan-glow);
}

.btn-danger {
    border-color: rgba(255, 51, 102, 0.2);
}

.btn-danger:hover {
    border-color: var(--color-red);
    color: var(--color-red);
    box-shadow: 0 0 8px rgba(255, 51, 102, 0.15);
}

/* Main Grid Layout */
.workspace-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 0.8rem;
    flex: 1;
    min-height: 0; /* Important for flex child overflow scrolling */
}

/* Panels */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.panel-header {
    border-bottom: 1px solid var(--border-color);
    padding: 0.6rem 1rem;
    font-family: var(--font-sans);
    font-weight: 800;
    font-size: 0.75rem;
    letter-spacing: 1px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
}

.panel-status {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

.panel-body {
    padding: 0.8rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* Left Column Panels */
.workspace-left {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    min-height: 0;
}

/* Editor Panel */
.editor-panel {
    height: 180px;
    flex-shrink: 0;
}

.editor-stats {
    display: flex;
    gap: 0.8rem;
}

.stat-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
}

.stat-badge strong {
    color: var(--text-primary);
}

.stat-badge.highlight-cyan strong {
    color: var(--color-cyan);
    text-shadow: 0 0 5px var(--color-cyan-glow);
}

textarea {
    width: 100%;
    height: 100%;
    resize: none;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Token Stream Viewer */
.token-panel {
    flex: 1;
    min-height: 0;
}

.token-stream-container {
    width: 100%;
    height: 100%;
    overflow-y: auto;
    background: rgba(4, 7, 18, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    padding: 0.8rem;
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 0.5rem;
}

.stream-placeholder {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-sans);
    margin: auto;
    text-align: center;
}

/* Token Badges alternating colors */
.token-badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    border-radius: 6px;
    padding: 3px 6px;
    font-family: var(--font-mono);
    border: 1px solid transparent;
    transition: 0.2s;
}

.token-badge .token-chars {
    font-size: 0.85rem;
    font-weight: 600;
}

.token-badge .token-id {
    font-size: 0.55rem;
    opacity: 0.6;
    margin-top: 1px;
}

/* Specific Token segment colors */
.tok-color-0 {
    background: rgba(0, 240, 255, 0.06);
    border-color: rgba(0, 240, 255, 0.25);
    color: var(--color-cyan);
    box-shadow: 0 0 6px rgba(0, 240, 255, 0.04);
}
.tok-color-1 {
    background: rgba(255, 0, 127, 0.06);
    border-color: rgba(255, 0, 127, 0.25);
    color: var(--color-magenta);
    box-shadow: 0 0 6px rgba(255, 0, 127, 0.04);
}
.tok-color-2 {
    background: rgba(255, 170, 0, 0.06);
    border-color: rgba(255, 170, 0, 0.25);
    color: var(--color-amber);
    box-shadow: 0 0 6px rgba(255, 170, 0, 0.04);
}
.tok-color-3 {
    background: rgba(0, 255, 102, 0.06);
    border-color: rgba(0, 255, 102, 0.25);
    color: var(--color-green);
    box-shadow: 0 0 6px rgba(0, 255, 102, 0.04);
}
.tok-color-4 {
    background: rgba(176, 38, 255, 0.06);
    border-color: rgba(176, 38, 255, 0.25);
    color: var(--color-purple);
    box-shadow: 0 0 6px rgba(176, 38, 255, 0.04);
}

/* Input Vector Panel */
.array-panel {
    height: 75px;
    flex-shrink: 0;
}

.token-ids-vector {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.02);
    border-radius: 6px;
    padding: 0.5rem;
    height: 100%;
    overflow-x: auto;
    white-space: nowrap;
    display: flex;
    align-items: center;
}

/* Right Column Panels */
.workspace-right {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    min-height: 0;
}

/* Lesson Console */
.lessons-panel {
    flex: 1.1;
    min-height: 0;
}

.challenges-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.challenge-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.01);
    transition: 0.25s;
}

.challenge-card.active {
    border-color: rgba(0, 240, 255, 0.25);
    background: rgba(0, 240, 255, 0.02);
}

.challenge-card.locked {
    opacity: 0.45;
}

.challenge-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.4rem;
}

.challenge-badge {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 1px 4px;
    border-radius: 3px;
    color: var(--text-secondary);
}

.challenge-card.active .challenge-badge {
    border-color: var(--color-cyan);
    color: var(--color-cyan);
    background: rgba(0, 240, 255, 0.08);
}

.challenge-header h3 {
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
}

.challenge-status {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: bold;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.challenge-card.active .challenge-status {
    color: var(--color-amber);
}

.challenge-card.completed .challenge-status {
    color: var(--color-green);
    text-shadow: 0 0 5px var(--color-green-glow);
}

.challenge-card.completed {
    border-color: rgba(0, 255, 102, 0.2);
    background: rgba(0, 255, 102, 0.01);
}

.challenge-body p {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 0.4rem;
}

.challenge-body code {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 1px 3px;
    border-radius: 3px;
    color: var(--text-primary);
}

.challenge-instruction {
    border-top: 1px dashed var(--border-color);
    padding-top: 0.4rem;
    margin-top: 0.4rem;
    color: var(--text-primary) !important;
}

/* Success Card */
.success-box {
    border: 1px solid var(--color-green);
    background: rgba(0, 255, 102, 0.06);
    border-radius: 8px;
    padding: 0.8rem;
    text-align: center;
    margin-top: 0.6rem;
    box-shadow: 0 0 15px rgba(0, 255, 102, 0.08);
}

.success-box h3 {
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--color-green);
    letter-spacing: 1px;
    margin-bottom: 0.2rem;
}

.success-box p {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.45;
    margin-bottom: 0.6rem;
}

.btn-share-score {
    background: rgba(0, 255, 102, 0.08);
    border: 1px solid var(--color-green);
    color: var(--color-green);
    font-weight: bold;
    width: 100%;
}

.btn-share-score:hover {
    background: rgba(0, 255, 102, 0.15);
    color: var(--color-green);
    border-color: var(--color-green);
    box-shadow: 0 0 10px var(--color-green-glow);
}

.hidden {
    display: none !important;
}

/* Dictionary Panel */
.dictionary-panel {
    height: 260px;
    flex-shrink: 0;
    min-height: 0;
}

.dictionary-grid-header {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    border-bottom: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: bold;
    color: var(--text-muted);
}

.dictionary-list {
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.dictionary-item {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    padding: 0.4rem 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    align-items: center;
}

.dictionary-item .pair-expr {
    color: var(--text-muted);
}

.dictionary-item .res-token {
    color: var(--color-cyan);
    font-weight: bold;
}

.dictionary-item .token-id {
    color: var(--text-secondary);
}

/* Footer Styling */
.console-footer {
    display: flex;
    justify-content: space-between;
    border: 1px solid var(--border-color);
    background: var(--panel-bg);
    border-radius: 10px;
    padding: 0.4rem 1rem;
    margin-top: 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-secondary);
}

/* Scrollbar customizations */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.01);
}
::-webkit-scrollbar-thumb {
    background: rgba(0, 240, 255, 0.25);
    border-radius: 4px;
    border: 1px solid rgba(0, 240, 255, 0.1);
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 240, 255, 0.45);
    box-shadow: 0 0 8px var(--color-cyan-glow);
}

/* Responsive Grid overrides */
@media (max-width: 900px) {
    .workspace-grid {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }
    body {
        overflow: auto;
    }
    .console-wrapper {
        height: auto;
    }
    .editor-panel, .array-panel {
        height: auto;
        min-height: 120px;
    }
    .token-panel {
        height: 250px;
    }
}