* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100vh;
    background: #0d0b08;
    color: #e8c85a;
    font-family: "Courier New", Courier, monospace;
}

#app {
    display: flex;
    justify-content: center;
    padding: 2rem 1rem;
}

.boot-screen {
    margin-top: 20vh;
    font-size: 1.2rem;
    letter-spacing: 0.2em;
    animation: blink 1s steps(2) infinite;
}

@keyframes blink { 50% { opacity: 0.3; } }

.machine {
    width: min(720px, 100%);
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.2rem;
    letter-spacing: 0.35em;
    text-shadow: 0 0 12px rgba(232, 200, 90, 0.55);
}

header .subtitle {
    display: block;
    margin-bottom: 1.2rem;
    font-size: 0.8rem;
    opacity: 0.65;
    letter-spacing: 0.1em;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.controls select,
.controls button {
    background: #1a150e;
    color: #e8c85a;
    border: 1px solid #5a4a24;
    border-radius: 4px;
    padding: 0.35rem 0.7rem;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
}

.controls select:hover,
.controls button:hover {
    border-color: #e8c85a;
    box-shadow: 0 0 8px rgba(232, 200, 90, 0.35);
}

.rom-hint {
    margin: 0 0 0.9rem;
    font-size: 0.78rem;
    opacity: 0.7;
    letter-spacing: 0.04em;
    min-height: 1.2em;
}

.screen-bezel {
    position: relative;
    display: inline-block;
    padding: 14px;
    background: #191512;
    border: 2px solid #2c261f;
    border-radius: 12px;
    box-shadow: 0 0 40px rgba(232, 200, 90, 0.12), inset 0 0 24px #000;
}

canvas#chip8-screen {
    display: block;
    width: 100%;
    max-width: 640px;
    aspect-ratio: 2 / 1;
    background: #0a0a00;
    image-rendering: pixelated;
    border-radius: 4px;
}

/* CRT scanline overlay */
.scanlines {
    position: absolute;
    inset: 14px;
    pointer-events: none;
    border-radius: 4px;
    background: repeating-linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0) 0px,
        rgba(0, 0, 0, 0) 2px,
        rgba(0, 0, 0, 0.25) 3px
    );
}

footer {
    margin-top: 1.2rem;
    font-size: 0.75rem;
    opacity: 0.75;
    line-height: 1.9;
}

footer a { color: #e8c85a; }

kbd {
    display: inline-block;
    min-width: 1.3em;
    padding: 0.1em 0.25em;
    margin: 0 1px;
    border: 1px solid #5a4a24;
    border-radius: 3px;
    background: #1a150e;
    font-family: inherit;
}

#blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.6rem 1.25rem;
    background: #3d1f1f;
    color: #ffd7d7;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
    cursor: pointer;
}