body {
    background: black;
    color: white;
    font-family: monospace;
    margin: 0;
    padding: 10px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    box-sizing: border-box;
    position: relative;
}

.menu-container {
    position: fixed;
    top: 0;
    right: 0;
    z-index: var(--z-menu-dropdown);
}

.menu-button {
    background: rgba(0, 0, 0, 0.8);
    border: none;
    border-radius: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
    color: white;
    font-size: 20px;
}

.menu-button:hover {
    background: white;
    transform: scale(1.5);
}

.menu-dropdown {
    display: none;
    position: absolute;
    top: 45px;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    border: 2px solid white;
    border-radius: 8px;
    min-width: 120px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    z-index: var(--z-menu-dropdown);
}

.menu-item {
    display: block;
    padding: 10px 15px;
    color: white;
    text-decoration: none;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.menu-item:last-child {
    border-bottom: none;
}

.menu-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #00ff00;
}


/* Assembly section header with touch hint */
.section-header-flex {
    display: flex;
    align-items: center;
    gap: 15px;
}

.touch-hint {
    font-size: 10px;
    color: #666;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid #666;
    border-radius: 4px;
    display: flex;
    text-align: center;
    width: 35px;
    height: 40px;
    padding: 0 2px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1.1;
}

.touch-hint:hover {
    color: white;
    border-color: white;
    background: rgba(255, 255, 255, 0.1);
}

/* Header menu for assembly section - only show on narrow devices */
.header-menu {
    display: none;
}

/* Show header menu on narrow devices where expansion is useful */
@media (max-width: 768px) {
    body {
        padding: 0;
    }
    
    .header-menu {
        display: flex;
        gap: 2px;
    }
    
    .top-row {
        flex-direction: column;
    }
    .section {
        margin-bottom: 0px;
    }
    .section-content {
        flex-direction: column;
    }
    
    .section-controls {
        flex: 0 0 auto;
        min-width: auto;
    }
    
    .execution-controls {
        padding-left: 0;
    }
    
    .keyboard-status {
        display: none;
    }
    .controls {
        gap : 0px;
    }
    .assembly-section {
        min-height: 60vh;
    }
    
    /* Hide magazine listing section until it has content */
    .listing-section {
        display: none;
    }
    
    /* Show listing section when it has content (when #machineCode is not empty) */
    .listing-section:has(#machineCode:not(:empty)) {
        display: flex;
        height: 33.33vh;
    }
}

.header-menu-item {
    font-size: 16px;
    color: #666;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid #666;
    border-radius: 4px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.header-menu-item:hover {
    color: white;
    border-color: white;
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

/* Section main content layout */
.section-main-flex {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.flex-textarea {
    flex: 1;
}

#screen {
    border: 2px solid white;
    font-family: 'Courier New', Consolas, 'Liberation Mono', monospace;
    font-size: 12px;
    background: black;
    color: white;
    padding: 5px;
    display: grid;
    grid-template-columns: repeat(32, 1fr);
    grid-template-rows: repeat(24, 1fr);
    gap: 0;
    width: 480px;
    height: 360px;
    max-width: calc(100vw - 25px);
    max-height: calc(80vh);
    overflow: hidden;
    will-change: contents;
    contain: layout style;
    box-sizing: border-box;
    flex-shrink: 0;
}


.screen-char {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: normal;
    line-height: 1;
    overflow: hidden;
    text-align: center;
}

.screen-char.inverted {
    background-color: white;
    color: black;
}

.controls {
    margin-top: 10px;
    flex-shrink: 0;
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

@media (min-width: 769px) {
    .assembly-section .section-controls .controls {
        display: flex;
        flex-direction: column;
    }
    .assembly-section .section-controls .controls button {
        flex: none; /* Override the default flex: 1 for assembly buttons */
    }
}

/* Stack assembly controls vertically and pin Assemble and Run to bottom */
.assembly-section .section-controls .controls {
    display: flex;
    flex-direction: column;
}

.assembly-section .section-controls .controls button {
    flex: none; /* Override the default flex: 1 for assembly buttons */
}

button {
    background: #f0f0f0;
    color: black;
    border: 2px inset #ccc;
    padding: 8px 2px;
    margin: 2px;
    font-family: monospace;
    font-size: 12px;
    font-weight: bold;
    box-sizing: border-box;
    flex: 1;
    min-width: 60px;
    box-shadow: inset 1px 1px 2px rgba(255,255,255,0.8), inset -1px -1px 2px rgba(0,0,0,0.2);
    border-radius: 0;
    cursor: pointer;
    transition: all 0.1s ease;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

button:hover {
    background: #e8e8e8;
    box-shadow: inset 1px 1px 3px rgba(255,255,255,0.9), inset -1px -1px 3px rgba(0,0,0,0.3);
}

button:active {
    background: #d0d0d0;
    border: 2px inset #999;
    box-shadow: inset 2px 2px 4px rgba(0,0,0,0.3), inset -1px -1px 2px rgba(255,255,255,0.5);
    transform: translateY(1px);
}

.debug {
    margin-top: 15px;
    padding: 12px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    color: #ccc;
    flex-shrink: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 4px 16px;
}

.debug > div {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2px 0;
}

.debug span {
    color: #4CAF50;
    font-weight: bold;
    font-family: 'Courier New', monospace;
    letter-spacing: 0.5px;
}

.top-row {
    display: flex;
    flex-direction: row;
    gap: 10px;
    margin-bottom: 10px;
}

.top-row .assembly-section {
    flex: 2;
}

.top-row .listing-section {
    flex: 1;
}

.section {
    margin-bottom: 10px;
    border: 1px solid #333;
    padding: 10px;
    border-radius: 5px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    box-sizing: border-box;
}

.section h2 {
    margin-top: 0;
    margin-bottom: 10px;
    color: #ccc;
    flex-shrink: 0;
}

textarea {
    background: #111;
    color: white;
    border: 1px solid #333;
    font-family: monospace;
    font-size: 14px;
    padding: 10px;
    width: 100%;
    resize: none;
    flex: 1;
    box-sizing: border-box;
    min-height: 100px;
}

#machineCode {
    background: #111;
    border: 1px solid #333;
    padding: 10px;
    font-family: monospace;
    font-size: 12px;
    overflow-y: auto;
    white-space: pre-wrap;
    overflow-x: auto;
    flex: 1;
    box-sizing: border-box;
    color: white;
}

#machineCode.error {
    color: #ff6666;
}

#console {
    background: #000;
    border: 1px solid #333;
    padding: 10px;
    font-family: monospace;
    font-size: 12px;
    white-space: pre-wrap;
    overflow-y: auto;
    flex: 1;
    box-sizing: border-box;
}

.execution-section {
    min-height: max(100px, 33.33vh);
    flex: 1;
}

.assembly-section {
    min-height: max(100px, 33.33vh);
    height: 33.33vh;
    flex: 0 0 auto;
}

.listing-section {
    min-height: max(100px, 33.33vh);
    height: 33.33vh;
    max-height: 60vh;
    flex: 0 0 auto;
}

.console-section {
    min-height: max(100px, 20vh);
    height: 20vh;
    flex: 0 0 auto;
}

.section-content {
    display: flex;
    flex-direction: row;
    flex: 1;
    overflow: hidden;
    gap: 0;
}

.section-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.section-controls {
    display: flex;
    flex-direction: column;
    flex: 0 0 200px;
    min-width: 200px;
    overflow-y: auto;
}

.execution-left {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
}

.execution-controls {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 200px;
    overflow-y: auto;
    padding-left: 10px;
}

.game-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin: 4px 0 2px 0;
}

.edit-toggle {
    background: white;
    color: red;
    border: none;
    padding: 4px;
    font-family: monospace;
    font-size: 12px;
    font-weight: bold;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    cursor: pointer;
    margin-top: 4px;
    margin-bottom: 4px;
    transition: all 0.2s;
    border-radius: 0;
    box-shadow: inset 1px 1px 2px rgba(255,255,255,0.8), inset -1px -1px 2px rgba(0,0,0,0.2);
}

.edit-toggle:hover { 
    background: #f0f0f0; 
}

.edit-toggle.active { 
    background: red; 
    color: white; 
}

.edit-toggle.active:hover { 
    background: #cc0000; 
}

.edit-input {
    background: transparent;
    border: none;
    color: inherit;
    font: inherit;
    text-align: center;
    width: 100%;
    outline: none;
    padding: 0;
    margin: 0;
}

.game-buttons button {
    flex: 1;
    margin: 0;
}

.game-buttons button.edit-mode {
    color: red;
    animation: pulsateText 3s ease-in-out infinite;
    line-height: 1;
    overflow: hidden;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Prevent double-click zoom on buttons */
button {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

/* Prevent double-click zoom on all interactive elements */
.header-menu-item, .game-buttons button, .controls button {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(255, 107, 53, 0.3);
        transform: scale(.95);
    }
    50% {
        box-shadow: 0 0 15px rgba(255, 107, 53, 0.6);
        transform: scale(1);
    }
}

@keyframes pulsateText {
    0%, 100% {
            font-size: 100%;
    }
    50% {
        font-size: 200%;
    }
}

.keyboard-status {
    text-align: center;
    color: #888;
    margin: 10px 0px 0px 0px;
    padding: 5px;
    font-style: italic;
    width: 470px;
    background: #f0f0f0;
    border-radius: 4px;
    transition: all 0.3s ease;
}

/* Attention-grabbing state when section doesn't have focus */
.keyboard-status.hover-state {
    color: #ff6b35;
    background: #fff3e0;
    border: 2px solid #ff6b35;
    font-weight: bold;
    animation: pulseGlow 2s ease-in-out infinite;
    width: 455px;
    
}

/* Hide keyboard status on touch devices */
@media (pointer: coarse) and (hover: none) {
    .keyboard-status {
        display: none;
    }
}

@media (max-width: 768px) {
    body {
        padding: 0;
    }
    
    /* Show header menu on narrow devices where expansion is useful */
    .header-menu {
        display: flex;
        gap: 2px;
    }
    
    .top-row {
        flex-direction: column;
    }
    .section {
        margin-bottom: 0px;
    }
    .section-content {
        flex-direction: column;
    }
    
    .section-controls {
        flex: 0 0 auto;
        min-width: auto;
    }
    
    .execution-controls {
        padding-left: 0;
    }
    
    .keyboard-status {
        display: none;
    }
    .controls {
        gap : 0px;
    }
    .assembly-section {
        min-height: 60vh;
    }
    
    /* Hide magazine listing section until it has content */
    .listing-section {
        display: none;
    }
    
    /* Show listing section when it has content (when #machineCode is not empty) */
    .listing-section:has(#machineCode:not(:empty)) {
        display: flex;
        height: 33.33vh;
    }
}