/* =============================================================================
   DOS GREEN PIXELATED WEBSITE
   ============================================================================= */

/* Modern CSS Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    line-height: 1;
    /* Pixel-perfect rendering */
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-crisp-edges;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

body {
    font-family: 'VT323', monospace;
    line-height: 1;
    color: var(--color-green-bright);
    background-color: var(--color-black);
    /* Disable text anti-aliasing for pixel-perfect text */
    -webkit-font-smoothing: none;
    -moz-osx-font-smoothing: auto;
    font-smooth: never;
    text-rendering: optimizeSpeed;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden; /* Prevent scrollbars */
    /* cursor: none; - Removed to allow normal mouse cursor */
}

/* =============================================================================
   DOS COLOR PALETTE
   ============================================================================= */

:root {
    /* DOS Green Color Palette */
    --color-black: #000000;              /* Pure black background */
    --color-green-bright: #00FF00;       /* Bright DOS green */
    --color-green-medium: #00AA00;       /* Medium green for depth */
    --color-green-dark: #006600;         /* Dark green for shadows */
    --color-green-dim: #003300;          /* Very dark green for subtle elements */
    --color-white: #FFFFFF;              /* White for lightning/highlights */
    --color-green-glow: #00FF00;         /* Glow effect color */

    /* Pixel Grid System - 8px base unit */
    --pixel-base: 8px;
    --pixel-xs: calc(var(--pixel-base) * 0.5);   /* 4px */
    --pixel-sm: var(--pixel-base);               /* 8px */
    --pixel-md: calc(var(--pixel-base) * 2);     /* 16px */
    --pixel-lg: calc(var(--pixel-base) * 3);     /* 24px */
    --pixel-xl: calc(var(--pixel-base) * 4);     /* 32px */
    --pixel-xxl: calc(var(--pixel-base) * 6);    /* 48px */

    /* DOS Terminal - single base size that scales with maximum cap */
    --terminal-font-size: max(24px, min(6vw, 6vh, 28px));
    --terminal-line-height: 1.2;

    /* Effects */
    --glow-size: 2px;
    --scanline-opacity: 0.1;
    --transition-fast: 0.1s linear;
    --transition-base: 0.2s linear;

    /* Grid dimensions - 10% larger for better readability */
    --grid-cols: 40;     /* 40 columns */
    --grid-rows: 30;     /* 30 rows */
    --cell-size: 9px;    /* Each cell is 9x9 pixels (10% larger) */
}

/* =============================================================================
   FULL VIEWPORT CANVAS
   ============================================================================= */

.pixel-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    background-color: var(--color-black);
    /* Pixel-perfect canvas rendering */
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-crisp-edges;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    display: block;
}

/* =============================================================================
   HTML OVERLAY SYSTEM
   ============================================================================= */

.pixel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2;
    pointer-events: none; /* Allow clicks to pass through to canvas */
    /* Add subtle scanlines */
    background-image: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 0, var(--scanline-opacity)) 2px,
        rgba(0, 255, 0, var(--scanline-opacity)) 4px
    );
}

/* =============================================================================
   NAVIGATION - ALIGNED TO PIXEL GRID
   ============================================================================= */

.pixel-nav {
    position: absolute;
    top: calc(var(--terminal-font-size) * 1);
    left: calc(var(--terminal-font-size) * 1);
    display: flex;
    /* Gap aligned to grid - 24px = 3 cells of 8px */
    gap: calc(var(--cell-size) * 3);     /* 24px - exactly 3 grid cells */
    pointer-events: auto;     /* Enable clicks for nav */
    z-index: 3;
    /* Ensure nav aligns perfectly with grid */
    align-items: flex-start;
}

.nav-item {
    color: var(--color-green-medium);
    font-size: var(--terminal-font-size);
    line-height: var(--terminal-line-height);
    text-transform: uppercase;
    cursor: pointer;
    user-select: none;
    display: inline-block;
    margin-right: calc(var(--terminal-font-size) * 0.5);
    padding: calc(var(--terminal-font-size) * 0.3) calc(var(--terminal-font-size) * 0.6);
    border: 1px solid var(--color-green-dark);
    background-color: rgba(0, 0, 0, 0.8);
}

.nav-item:hover,
.nav-item.active {
    color: var(--color-white); /* White text for maximum contrast */
    border-color: var(--color-green-bright); /* Bright border on hover/active */
    background-color: rgba(0, 255, 0, 0.15); /* More opaque background */
    /* Enhanced shadow for prominence */
    box-shadow: 0 0 8px var(--color-green-glow);
    text-shadow: 0 0 4px var(--color-green-glow);
    transform: translateY(-1px); /* Subtle lift effect */
}

.nav-item.active {
    animation: activePulse 2s ease-in-out infinite;
}

@keyframes activePulse {
    0%, 100% {
        box-shadow: 0 0 var(--glow-size) var(--color-green-glow);
        background-color: rgba(0, 255, 0, 0.05);
    }
    50% {
        box-shadow: 0 0 calc(var(--glow-size) * 1.5) var(--color-green-glow);
        background-color: rgba(0, 255, 0, 0.1);
    }
}

/* =============================================================================
   CONTENT SECTIONS (HIDDEN - CONTENT RENDERED ON CANVAS)
   ============================================================================= */

.pixel-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    /* Content is structurally here for accessibility but visually rendered on canvas */
}

.content-section {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    visibility: hidden;
    /* Screen reader accessible but visually hidden */
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.content-section.active {
    /* Keep for screen readers */
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============================================================================
   STATUS BAR
   ============================================================================= */

.pixel-status {
    position: absolute;
    bottom: calc(var(--terminal-font-size) * 1);
    left: calc(var(--terminal-font-size) * 1);
    right: calc(var(--terminal-font-size) * 1);
    height: calc(var(--terminal-font-size) * 3);
    background-color: rgba(0, 0, 0, 0.8);
    border: 2px solid var(--color-green-dark);
    display: flex;
    align-items: center;
    padding: 0 var(--pixel-md);
    pointer-events: auto;
    z-index: 3;
}

.status-text {
    color: var(--color-green-medium);
    font-size: var(--terminal-font-size);
    line-height: var(--terminal-line-height);
    text-transform: uppercase;
}

@keyframes statusBlink {
    0%, 90% { opacity: 0.7; } /* Match the base opacity */
    95%, 100% { opacity: 0.2; } /* Much more subtle blink */
}

/* =============================================================================
   CHARACTER AREA PLACEHOLDER
   ============================================================================= */

.character-area {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: calc(var(--pixel-base) * 8);  /* 64px */
    height: calc(var(--pixel-base) * 8); /* 64px */
    pointer-events: auto;
    z-index: 3;
    /* Visual indicator for center area (development only) */
    border: 1px dashed var(--color-green-dim);
    opacity: 0; /* Hidden by default */
}

/* =============================================================================
   LOADING OVERLAY
   ============================================================================= */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: opacity var(--transition-base);
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--pixel-md);
    color: var(--color-green-bright);
}

.loading-spinner {
    font-size: var(--font-size-huge);
    animation: loadingSpin 1s linear infinite;
    /* Pixel-perfect rendering */
    -webkit-font-smoothing: none;
    -moz-osx-font-smoothing: auto;
    font-smooth: never;
}

@keyframes loadingSpin {
    0% {
        transform: rotate(0deg);
        color: var(--color-green-dim);
    }
    25% {
        color: var(--color-green-dark);
    }
    50% {
        transform: rotate(180deg);
        color: var(--color-green-medium);
    }
    75% {
        color: var(--color-green-bright);
    }
    100% {
        transform: rotate(360deg);
        color: var(--color-green-dim);
    }
}

.loading-text {
    font-size: var(--font-size-base); /* 10px */
    font-weight: normal; /* Less bold for pixel clarity */
    text-transform: uppercase;
    letter-spacing: 1px; /* Reduced letter spacing */
    line-height: 1;
    color: var(--color-green-medium);
    /* Pixel-perfect text */
    -webkit-font-smoothing: none;
    -moz-osx-font-smoothing: auto;
    font-smooth: never;
    text-rendering: optimizeSpeed;
    animation: loadingTextBlink 2s step-end infinite;
}

@keyframes loadingTextBlink {
    0%, 60% { opacity: 1; }
    61%, 100% { opacity: 0.3; }
}

/* =============================================================================
   UTILITY CLASSES
   ============================================================================= */

/* Pixel-perfect rendering utility */
.pixel-perfect {
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-crisp-edges;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    -webkit-font-smoothing: none;
    -moz-osx-font-smoothing: auto;
    font-smooth: never;
}

/* Green glow effect */
.green-glow {
    text-shadow:
        0 0 var(--glow-size) var(--color-green-glow),
        0 0 calc(var(--glow-size) * 2) var(--color-green-glow);
    box-shadow:
        0 0 var(--glow-size) var(--color-green-glow);
}

/* Hide/show utilities */
.hidden {
    display: none !important;
}

.invisible {
    opacity: 0;
    pointer-events: none;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============================================================================
   RESPONSIVE DESIGN - MAINTAIN PIXEL GRID
   ============================================================================= */

@media (max-width: 768px) {
    :root {
        --pixel-base: 6px; /* Smaller base for mobile */
        --font-size-xs: 16px; /* Much larger for tablet readability */
        --font-size-sm: 20px; /* Much larger for tablet readability */
        --font-size-base: 22px; /* Much larger for tablet readability */
        --font-size-lg: 24px; /* Much larger for tablet readability */
        --cell-size: 8px;   /* Slightly smaller grid on mobile */
        --grid-cols: 30;    /* Fewer columns on mobile */
        --grid-rows: 25;    /* Fewer rows on mobile */
    }

    .pixel-nav {
        top: calc(var(--terminal-font-size) * 1);
        left: calc(var(--terminal-font-size) * 1);
        gap: calc(var(--terminal-font-size) * 0.5);
        flex-wrap: wrap;
    }

    .nav-item {
        padding: calc(var(--terminal-font-size) * 0.1) calc(var(--terminal-font-size) * 0.2);
        margin-right: calc(var(--terminal-font-size) * 0.2);
    }

    .pixel-status {
        bottom: calc(var(--terminal-font-size) * 1);
        left: calc(var(--terminal-font-size) * 1);
        right: calc(var(--terminal-font-size) * 1);
        height: calc(var(--terminal-font-size) * 3);
    }
}

@media (max-width: 480px) {
    :root {
        --pixel-base: 4px; /* Even smaller for tiny screens */
        --font-size-xs: 18px; /* Very large for mobile readability */
        --font-size-sm: 22px; /* Very large for mobile readability */
        --font-size-base: 24px; /* Very large for mobile readability */
        --font-size-lg: 26px; /* Very large for mobile readability */
        --cell-size: 7px;   /* Smaller grid for mobile */
        --grid-cols: 25;
        --grid-rows: 20;
    }

}

/* High DPI displays - maintain pixel crispness */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .pixel-perfect,
    .pixel-canvas,
    body,
    .nav-item,
    .status-text,
    .loading-text {
        -webkit-font-smoothing: none;
        -moz-osx-font-smoothing: auto;
        font-smooth: never;
        text-rendering: optimizeSpeed;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }

    .loading-spinner {
        animation: none !important;
        transform: none !important;
    }

    .loading-text {
        animation: none !important;
        opacity: 1 !important;
    }

    .nav-item.active {
        animation: none !important;
    }

    .status-text {
        animation: none !important;
        opacity: 1 !important;
    }
}