/* ZX Spectrum Retro Theme - Modern & Elegant */

:root {
    --zx-black: #000000;
    --zx-blue: #0000D7;
    --zx-red: #D70000;
    --zx-magenta: #D700D7;
    --zx-green: #00D700;
    --zx-cyan: #00D7D7;
    --zx-yellow: #D7D700;
    --zx-white: #D7D7D7;
    --zx-bright-blue: #0000FF;
    --zx-bright-red: #FF0000;
    --zx-bright-magenta: #FF00FF;
    --zx-bright-green: #00FF00;
    --zx-bright-cyan: #00FFFF;
    --zx-bright-yellow: #FFFF00;
    --zx-bright-white: #FFFFFF;
    
    /* Aliases for compatibility */
    --color-black: var(--zx-black);
    --color-white: var(--zx-bright-white);
    --color-cyan: var(--zx-bright-cyan);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background: #1a1a1a;
    color: var(--zx-bright-cyan);
    font-family: 'Courier New', monospace;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Page layout styles */
body.page-layout {
    padding: 60px 20px 20px;
    box-sizing: border-box;
}

/* Retro CRT effect background - keeping for possible future use */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        repeating-linear-gradient(
            0deg,
            rgba(0, 0, 0, 0.15),
            rgba(0, 0, 0, 0.15) 1px,
            transparent 1px,
            transparent 2px
        );
    pointer-events: none;
    z-index: 1;
    display: none; /* Disabled by default */
}

/* Main container - keeping for other pages */
.spectrum-container {
    background: var(--zx-black);
    border: 3px solid var(--zx-bright-white);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 
        0 0 40px rgba(0, 215, 255, 0.5),
        inset 0 0 20px rgba(0, 0, 0, 0.5);
    position: relative;
    z-index: 2;
}

/* Canvas styling */
canvas {
    display: block;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    border: 2px solid #333;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.8);
}

/* Screen canvas */
#screen {
    background: var(--color-black);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

/* Emulator container */
.emulator-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

/* Title - keeping for other pages */
h1 {
    font-size: 24px;
    margin: 0 0 20px 0;
    text-align: center;
    color: var(--zx-bright-yellow);
    text-shadow: 
        2px 2px 0 var(--zx-red),
        -1px -1px 0 var(--zx-blue);
    letter-spacing: 2px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.9; }
}

/* Info box - keeping for other pages */
.info {
    margin-top: 20px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--zx-cyan);
    border-radius: 4px;
    font-size: 14px;
    line-height: 1.6;
    max-width: 500px;
}

.info code {
    background: var(--zx-blue);
    color: var(--zx-bright-white);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 13px;
}

/* Retro buttons */
.btn {
    background: var(--zx-blue);
    color: var(--zx-bright-yellow);
    border: 2px solid var(--zx-bright-white);
    padding: 8px 16px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
    margin: 4px;
    min-width: 80px;
}

.btn:hover {
    background: var(--zx-bright-blue);
    box-shadow: 0 0 10px var(--zx-cyan);
    transform: scale(1.05);
}

.btn:active {
    transform: scale(0.98);
}

.btn.active {
    background: var(--color-cyan);
    color: var(--color-black);
}

/* Control panel */
.controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

/* Classic control panel with border - keeping for other pages */
.controls-panel {
    margin-top: 20px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid var(--zx-magenta);
    border-radius: 4px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

/* Rainbow stripes (like Spectrum loading) */
.rainbow-strip {
    height: 4px;
    background: linear-gradient(
        to right,
        var(--zx-red) 0%,
        var(--zx-yellow) 14%,
        var(--zx-green) 28%,
        var(--zx-cyan) 42%,
        var(--zx-blue) 56%,
        var(--zx-magenta) 70%,
        var(--zx-white) 84%,
        var(--zx-black) 100%
    );
    margin: 20px 0;
    border-radius: 2px;
}

/* Loading animation - keeping for other pages */
.loading {
    display: inline-block;
    color: var(--zx-bright-yellow);
    animation: blink 1s steps(2, start) infinite;
}

@keyframes blink {
    to { visibility: hidden; }
}

/* Responsive */
@media (max-width: 768px) {
    .spectrum-container {
        padding: 16px;
        margin: 10px;
    }
    
    h1 {
        font-size: 20px;
    }
    
    .info {
        font-size: 13px;
        padding: 12px;
    }
    
    /* Mobile adjustments */
    body {
        padding: 44px 0 0;
        background: #0a0a0a;
        overflow-x: hidden;
    }

    .top-menu {
        height: 44px;
        box-shadow: 0 1px 3px rgba(0,0,0,0.3);
        background: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }

    .menu-container {
        padding: 0 16px;
    }

    .brand {
        font-size: 16px;
        letter-spacing: 1px;
    }

    .emulator-container {
        gap: 12px;
        width: 100%;
        padding: 12px 8px;
    }

    .rainbow-strip {
        height: 2px;
        width: 100%;
        border-radius: 1px;
    }

    #screen {
        width: 100%;
        max-width: 100%;
        height: auto;
        box-shadow: 0 2px 12px rgba(0,0,0,0.5);
        border: none;
        border-radius: 4px;
    }

    .controls {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        width: 100%;
        padding: 0 8px;
    }

    .btn {
        padding: 12px 16px;
        font-size: 14px;
        border-radius: 6px;
        font-weight: 500;
        white-space: nowrap;
        -webkit-tap-highlight-color: transparent;
        user-select: none;
        touch-action: manipulation;
        border: 1px solid rgba(255,255,255,0.2);
        transition: all 0.15s ease;
    }

    #load-btn,
    #audio-btn {
        grid-column: span 1;
    }

    #fullscreen-btn {
        grid-column: span 2;
    }

    #fast-load-btn {
        grid-column: span 2;
        display: none;
        margin-top: 8px;
    }

    #fast-load-btn:not([style*="none"]) {
        display: block;
    }

    #tape-status {
        font-size: 14px;
        padding: 12px 16px;
        height: auto;
        min-height: 44px;
        width: 100%;
        margin: 0;
        border-radius: 6px;
        text-align: center;
        line-height: 1.4;
    }

    /* Touch feedback */
    .btn:active {
        transform: scale(0.97);
        background-color: rgba(255,255,255,0.1);
    }

    /* Safe area insets for modern phones */
    @supports (padding: max(0px)) {
        body {
            padding-left: env(safe-area-inset-left);
            padding-right: env(safe-area-inset-right);
        }

        .top-menu {
            padding-left: env(safe-area-inset-left);
            padding-right: env(safe-area-inset-right);
        }
    }
}

@media (max-width: 480px) {
    .top-menu {
        height: 40px;
    }

    body {
        padding-top: 40px;
    }

    .menu-container {
        padding: 0 12px;
    }

    .brand {
        font-size: 14px;
        letter-spacing: 0.5px;
    }

    .emulator-container {
        padding: 8px 4px;
        gap: 8px;
    }

    .btn {
        font-size: 13px;
        padding: 10px 8px;
    }
}

/* Small phones */
@media (max-width: 375px) {
    .controls {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    #reset-btn,
    #pause-btn {
        grid-column: span 1;
    }

    #load-btn {
        grid-column: span 2;
    }

    #audio-btn {
        grid-column: span 2;
    }
}

/* Landscape mode adjustments */
@media (orientation: landscape) and (max-height: 600px) {
    body {
        padding: 36px 0 0;
    }

    .top-menu {
        height: 36px;
    }

    .emulator-container {
        flex-direction: row;
        align-items: center;
        justify-content: center;
        padding: 8px;
        gap: 16px;
    }

    .rainbow-strip {
        display: none;
    }

    #screen {
        max-height: calc(100vh - 52px);
        max-width: calc((100vh - 52px) * 1.186);
        width: auto;
        height: auto;
    }

    .controls {
        display: flex;
        flex-direction: column;
        gap: 6px;
        width: auto;
    }

    .controls .btn {
        width: 90px;
        padding: 8px 12px;
        font-size: 12px;
    }

    #tape-status {
        position: absolute;
        bottom: 8px;
        left: 50%;
        transform: translateX(-50%);
        width: auto;
        max-width: 300px;
        padding: 6px 12px;
        font-size: 12px;
        min-height: 32px;
    }
}

/* Utility classes - keeping for other pages */
.text-red { color: var(--zx-bright-red); }
.text-green { color: var(--zx-bright-green); }
.text-blue { color: var(--zx-bright-blue); }
.text-yellow { color: var(--zx-bright-yellow); }
.text-magenta { color: var(--zx-bright-magenta); }
.text-cyan { color: var(--zx-bright-cyan); }
.text-white { color: var(--zx-bright-white); }

.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.text-center { text-align: center; }

/* Tape status */
#tape-status {
    visibility: hidden;
    height: 40px;
    padding: 10px;
    background: var(--color-black);
    color: var(--color-white);
    border: 2px solid var(--color-white);
    font-family: monospace;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Top menu bar */
.top-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: var(--color-black);
    border-bottom: 2px solid var(--color-white);
    z-index: 100;
}

.menu-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 40px;
}

.brand {
    color: #FF0000;
    font-size: 18px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Hide elements */
.hidden { display: none !important; }
input[type="file"] { display: none; }

#fast-load-btn {
    display: none;
}

/* Fullscreen mode */
body.fullscreen-mode {
    background: #000;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body.fullscreen-mode .emulator-container {
    width: 100vw;
    height: 100vh;
    padding: 0;
}

body.fullscreen-mode .controls,
body.fullscreen-mode .rainbow-strip,
body.fullscreen-mode #tape-status,
body.fullscreen-mode .top-menu {
    display: none !important;
}