:root {
    --bg-color: #0A0F1A;
    --panel-bg: rgba(255, 255, 255, 0.03);
    --panel-border: rgba(255, 255, 255, 0.08);
    --primary: #3498DB;
    --primary-hover: #2980B9;
    --accent: #E17055;
    --accent-hover: #D35400;
    --text: #F8F9FA;
    --text-muted: #A0AABF;
    
    --success: #2ECC71;
    --success-bg: rgba(46, 204, 113, 0.15);
    --warning: #F1C40F;
    --warning-bg: rgba(241, 196, 15, 0.15);
    --wrong: #7F8C8D;
    --wrong-bg: rgba(127, 140, 141, 0.15);
    
    --br: 16px;
    --br-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    
    --grid-color: rgba(255, 255, 255, 0.05);
}

body.light-theme {
    --bg-color: #F8F9FA;
    --panel-bg: rgba(0, 0, 0, 0.03);
    --panel-border: rgba(0, 0, 0, 0.08);
    --text: #1A1F2B;
    --text-muted: #6C7A9C;
    --grid-color: rgba(0, 0, 0, 0.05);
    --wrong-bg: rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text);
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    overflow-x: hidden;
}

.app-wrap {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 900px;
    margin: 0 auto;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 20px;
}

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

.logo i {
    font-size: 1.8rem;
    color: var(--primary);
}

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

.highlight {
    color: var(--primary);
}

.header-controls {
    display: flex;
    gap: 12px;
}

.icon-btn {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    color: var(--text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.1rem;
}

.icon-btn:hover {
    background: var(--panel-border);
    transform: translateY(-2px);
}

/* Main Container */
.game-container {
    flex: 1;
    padding: 0 20px 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.level-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    padding: 16px 24px;
    border-radius: var(--br);
    backdrop-filter: blur(10px);
}

.level-indicator {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
}

.attempts-indicator {
    font-weight: 600;
    color: var(--text-muted);
}

#attempts-left {
    color: var(--text);
    font-weight: 800;
    font-size: 1.1rem;
}

/* Visuals */
.visuals {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 600px) {
    .visuals {
        grid-template-columns: 1fr;
    }
}

.visual-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--br);
    overflow: hidden;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
}

.panel-header {
    background: rgba(0, 0, 0, 0.1);
    padding: 12px;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--panel-border);
}

body.light-theme .panel-header {
    background: rgba(255, 255, 255, 0.5);
}

.box-container {
    height: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 20px 20px;
    background-position: center center;
    position: relative;
    overflow: hidden;
}

.demo-element {
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Gameplay Controls */
.glass-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--br);
    backdrop-filter: blur(10px);
    padding: 24px;
}

.properties-hint {
    margin-bottom: 20px;
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    text-align: center;
}

.inputs-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-row {
    display: flex;
    gap: 12px;
    align-items: center;
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.css-input {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--panel-border);
    border-radius: var(--br-sm);
    padding: 14px 16px;
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

body.light-theme .css-input {
    background: #FFFFFF;
}

.css-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.colon, .semicolon {
    color: var(--text-muted);
    font-weight: bold;
    font-size: 1.2rem;
    font-family: 'JetBrains Mono', monospace;
}

.actions {
    margin-top: 24px;
    display: flex;
    justify-content: center;
}

.primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--br-sm);
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.primary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.secondary-btn {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--panel-border);
    border-radius: var(--br-sm);
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.secondary-btn:hover {
    background: var(--panel-border);
}

.hint-text {
    margin-top: 20px;
    padding: 12px 16px;
    background: rgba(225, 112, 85, 0.1);
    border: 1px solid rgba(225, 112, 85, 0.2);
    border-radius: var(--br-sm);
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}

.hidden {
    display: none !important;
}

/* Feedback Board */
.feedback-container {
    margin-top: 16px;
}

.feedback-container h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    font-weight: 600;
}

.feedback-board {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    background: var(--panel-bg);
    border: 1px dashed var(--panel-border);
    border-radius: var(--br);
    color: var(--text-muted);
}

.guess-row {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--br);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    animation: slideIn 0.3s ease forwards;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.guess-item {
    display: flex;
    gap: 8px;
    align-items: center;
}

.guess-block {
    flex: 1;
    padding: 12px 16px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Status variants */
.status-correct {
    background-color: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.status-partial {
    background-color: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(241, 196, 15, 0.3);
}

.status-wrong {
    background-color: var(--wrong-bg);
    color: var(--wrong);
    border: 1px solid var(--panel-border);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -40%);
    width: 90%;
    max-width: 450px;
    z-index: 101;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.modal.active, .modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal.active {
    transform: translate(-50%, -50%);
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--accent);
}

.modal-icon.success {
    color: var(--success);
}

.modal h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.modal p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
}

.stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 200;
    pointer-events: none;
}

.toast {
    background: var(--text);
    color: var(--bg-color);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: toastIn 0.3s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
}