* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

:root {
    --gb-body: #C4C4B0;
    --gb-body-dark: #A0A090;
    --gb-bezel: #4A4A4A;
    --gb-screen-bg: #9BBC0F;
    --gb-green-dark: #0F380F;
    --gb-green-mid: #306230;
    --gb-green-light: #8BAC0F;
    --gb-green-lightest: #9BBC0F;
    --gb-btn-dark: #2D2D2D;
    --gb-btn-ab: #8B1A4A;
    --bg-color: #D4C5A9;
    --text-color: #333;
    --shadow-color: rgba(0,0,0,0.3);
}

body.dark-mode {
    --gb-body: #3A3A3A;
    --gb-body-dark: #2A2A2A;
    --gb-bezel: #1A1A1A;
    --bg-color: #1A1A1A;
    --text-color: #CCC;
    --shadow-color: rgba(0,0,0,0.6);
}

body {
    font-family: 'Press Start 2P', monospace;
    background: var(--bg-color);
    background-image:
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 20px,
            rgba(0,0,0,0.02) 20px,
            rgba(0,0,0,0.02) 21px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 20px,
            rgba(0,0,0,0.02) 20px,
            rgba(0,0,0,0.02) 21px
        );
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 20px 10px;
    color: var(--text-color);
    transition: background 0.3s, color 0.3s;
}

#app-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    width: 100%;
    max-width: 420px;
}

#gameboy {
    background: var(--gb-body);
    border-radius: 20px 20px 20px 80px;
    padding: 16px 20px 30px;
    width: 100%;
    max-width: 380px;
    box-shadow:
        0 8px 32px var(--shadow-color),
        inset 0 2px 0 rgba(255,255,255,0.3),
        inset 0 -2px 4px rgba(0,0,0,0.1);
    position: relative;
    transition: background 0.3s;
}

#cartridge-slot {
    background: #2A2A2A;
    height: 40px;
    margin: -16px -20px 12px;
    border-radius: 20px 20px 0 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#cartridge-ridges {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 100%;
    background: repeating-linear-gradient(
        90deg,
        transparent,
        transparent 4px,
        #1A1A1A 4px,
        #1A1A1A 6px
    );
}

#drop-zone {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    font-size: 7px;
    letter-spacing: 1px;
    cursor: pointer;
    z-index: 2;
    border: 2px dashed transparent;
    transition: all 0.2s;
}

#drop-zone.drag-over {
    border-color: var(--gb-green-light);
    background: rgba(139,172,15,0.2);
    color: var(--gb-green-light);
}

#file-input {
    display: none;
}

#load-btn {
    display: block;
    margin: 8px auto 4px;
    padding: 8px 14px;
    font-family: 'Press Start 2P', monospace;
    font-size: 6px;
    background: var(--gb-btn-dark);
    color: #CCC;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    box-shadow: 0 3px 0 #111;
    transition: all 0.1s;
    position: relative;
    z-index: 3;
}

#load-btn:hover {
    background: #444;
    transform: translateY(1px);
    box-shadow: 0 2px 0 #111;
}

#load-btn:active {
    transform: translateY(3px);
    box-shadow: 0 0 0 #111;
}

#screen-section {
    margin-bottom: 16px;
}

#top-label {
    text-align: center;
    font-size: 4.5px;
    color: #666;
    letter-spacing: 2px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

#screen-bezel {
    background: var(--gb-bezel);
    border-radius: 12px;
    padding: 14px 18px;
    position: relative;
    box-shadow:
        inset 0 4px 12px rgba(0,0,0,0.6),
        0 1px 0 rgba(255,255,255,0.1);
}

#led-indicator {
    width: 8px;
    height: 8px;
    background: #440000;
    border-radius: 50%;
    position: absolute;
    top: 6px;
    right: 14px;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.5);
    transition: all 0.3s;
}

#led-indicator.active {
    background: #FF2222;
    box-shadow:
        inset 0 1px 2px rgba(0,0,0,0.3),
        0 0 8px rgba(255,0,0,0.6),
        0 0 20px rgba(255,0,0,0.2);
}

#canvas {
    display: block;
    width: 100%;
    max-width: 320px;
    aspect-ratio: 160 / 144;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    background: var(--gb-screen-bg);
    border-radius: 4px;
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.3);
}

#screen-overlay {
    display: none;
}

#berry-boy-label {
    text-align: center;
    font-size: 14px;
    color: #445;
    margin-top: 8px;
    font-style: italic;
    letter-spacing: 2px;
}

#berry-boy-label .tm {
    font-size: 6px;
    vertical-align: super;
    font-style: normal;
}

#controls-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 10px 0;
}

#dpad-area {
    flex-shrink: 0;
}

#dpad {
    display: grid;
    grid-template-columns: 40px 40px 40px;
    grid-template-rows: 40px 40px 40px;
    gap: 0;
}

.dpad-btn {
    background: var(--gb-btn-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #555;
    font-size: 10px;
    cursor: pointer;
    transition: all 0.05s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.dpad-btn:active, .dpad-btn.pressed {
    background: #1A1A1A;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
    transform: scale(0.95);
}

#dpad-up { border-radius: 6px 6px 0 0; grid-column: 2; grid-row: 1; }
#dpad-left { border-radius: 6px 0 0 6px; grid-column: 1; grid-row: 2; }
#dpad-center { background: var(--gb-btn-dark); grid-column: 2; grid-row: 2; }
#dpad-right { border-radius: 0 6px 6px 0; grid-column: 3; grid-row: 2; }
#dpad-down { border-radius: 0 0 6px 6px; grid-column: 2; grid-row: 3; }

#ab-area {
    display: flex;
    gap: 12px;
    transform: rotate(-25deg);
    flex-shrink: 0;
}

.ab-btn {
    width: 52px;
    height: 52px;
    background: var(--gb-btn-ab);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
    font-size: 10px;
    cursor: pointer;
    box-shadow:
        0 4px 0 #5A1030,
        0 6px 8px rgba(0,0,0,0.3);
    transition: all 0.05s;
}

.ab-btn:active, .ab-btn.pressed {
    box-shadow:
        0 1px 0 #5A1030,
        0 2px 4px rgba(0,0,0,0.2);
    transform: translateY(3px);
}

#btn-b { margin-top: 14px; }

#meta-controls {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding: 18px 0 4px;
    transform: rotate(-25deg);
}

.meta-btn {
    width: 52px;
    height: 14px;
    background: #777;
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.4);
    transition: all 0.05s;
}

.meta-btn span {
    font-size: 4.5px;
    color: #444;
    letter-spacing: 1px;
}

.meta-btn:active, .meta-btn.pressed {
    box-shadow: inset 0 3px 6px rgba(0,0,0,0.6);
}

#speaker-grille {
    position: absolute;
    bottom: 28px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transform: rotate(-30deg);
}

.grille-line {
    width: 36px;
    height: 3px;
    background: rgba(0,0,0,0.15);
    border-radius: 2px;
}

#extra-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    align-items: center;
    max-width: 380px;
}

.retro-btn {
    font-family: 'Press Start 2P', monospace;
    font-size: 7px;
    padding: 8px 12px;
    background: #555;
    color: #EEE;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    box-shadow: 0 3px 0 #333;
    transition: all 0.1s;
}

.retro-btn:hover { background: #666; }
.retro-btn:active {
    transform: translateY(2px);
    box-shadow: 0 1px 0 #333;
}

#speed-controls {
    display: flex;
    gap: 4px;
}

.speed-btn {
    font-family: 'Press Start 2P', monospace;
    font-size: 6px;
    padding: 6px 8px;
    background: #444;
    color: #999;
    border: 2px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.1s;
}

.speed-btn.active {
    background: var(--gb-green-mid);
    color: var(--gb-green-lightest);
    border-color: var(--gb-green-light);
}

#sound-indicator {
    font-size: 6px;
    color: #888;
    padding: 4px;
}

#palette-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    align-items: center;
    max-width: 380px;
    width: 100%;
}

.palette-label {
    font-size: 6px;
    color: #888;
    letter-spacing: 1px;
    margin-right: 2px;
}

.palette-btn {
    font-family: 'Press Start 2P', monospace;
    font-size: 5px;
    padding: 5px 8px;
    background: #444;
    color: #AAA;
    border: 2px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
}

.palette-btn:hover {
    background: #555;
    color: #DDD;
}

.palette-btn.active {
    background: var(--gb-green-mid);
    color: var(--gb-green-lightest);
    border-color: var(--gb-green-light);
}

.palette-swatch {
    display: inline-block;
    width: 12px;
    height: 8px;
    border-radius: 2px;
    border: 1px solid rgba(255,255,255,0.2);
    flex-shrink: 0;
}

#debug-bar {
    width: 100%;
    max-width: 380px;
    text-align: center;
}

#debug-info {
    font-size: 5.5px;
    color: #8BAC0F;
    background: rgba(15, 56, 15, 0.15);
    padding: 4px 10px;
    border-radius: 4px;
    display: inline-block;
    letter-spacing: 0.5px;
    border: 1px solid rgba(139, 172, 15, 0.2);
}

body.dark-mode #debug-info {
    background: rgba(139, 172, 15, 0.1);
    color: #9BBC0F;
}

#keyboard-help {
    background: rgba(0,0,0,0.05);
    border: 1px dashed #999;
    border-radius: 8px;
    padding: 8px 14px;
    max-width: 380px;
    width: 100%;
    cursor: pointer;
}

#keyboard-toggle {
    font-size: 7px;
    color: #666;
    text-align: center;
}

#keyboard-content {
    margin-top: 8px;
    overflow: hidden;
    max-height: 200px;
    transition: max-height 0.3s;
}

#keyboard-help.collapsed #keyboard-content {
    max-height: 0;
    margin: 0;
}

.key-row {
    font-size: 6px;
    color: #777;
    padding: 3px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.key {
    background: #DDD;
    padding: 3px 6px;
    border-radius: 3px;
    border: 1px solid #BBB;
    font-size: 5px;
    box-shadow: 0 2px 0 #BBB;
    color: #333;
}

body.dark-mode .key {
    background: #555;
    border-color: #444;
    box-shadow: 0 2px 0 #333;
    color: #DDD;
}

#status-bar {
    display: flex;
    justify-content: space-between;
    width: 100%;
    max-width: 380px;
    font-size: 6px;
    color: #888;
    padding: 4px 0;
}

#rom-info {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#fps-counter {
    font-family: 'JetBrains Mono', monospace;
    flex-shrink: 0;
}

#toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #222;
    color: #EEE;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 7px;
    max-width: 90vw;
    text-align: center;
    opacity: 0;
    transition: all 0.3s;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    line-height: 1.6;
}

#toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

#toast.hidden { display: none; }

footer {
    font-size: 6px;
    color: #888;
    text-align: center;
    line-height: 2;
    padding: 8px 0 20px;
}

footer a {
    color: var(--gb-green-mid);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 440px) {
    #gameboy {
        border-radius: 14px 14px 14px 50px;
        padding: 12px 14px 24px;
    }

    .dpad-btn {
        width: 36px;
        height: 36px;
    }

    #dpad {
        grid-template-columns: 36px 36px 36px;
        grid-template-rows: 36px 36px 36px;
    }

    .ab-btn {
        width: 44px;
        height: 44px;
    }
}

@media (max-height: 700px) {
    body { padding: 8px; }
    #app-container { gap: 8px; }
}