/* Teletext Theme CSS - CRT Monitor Aesthetic */
/* Created: November 2025 */
/* Refined with input from Clive (ChatGPT) and Claude (Anthropic) */

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

:root {
    --teletext-bg: #000000;
    --teletext-text: #00FF00;
    --teletext-yellow: #FFFF00;
    --teletext-cyan: #00FFFF;
    --teletext-magenta: #FF00FF;
    --teletext-red: #FF0000;
    --teletext-blue: #0000FF;
    --teletext-white: #FFFFFF;
}

/* ============================================
   BASE STYLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--teletext-bg);
    color: var(--teletext-text);
    font-family: 'Courier New', 'Courier', monospace;
    font-size: 18px;
    line-height: 1.6;
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1 {
    color: var(--teletext-cyan);
    font-size: 3em;
    font-weight: bold;
    margin: 1em 0 0.5em 0;
    letter-spacing: 2px;
}

h2 {
    color: var(--teletext-yellow);
    font-size: 2em;
    font-weight: bold;
    margin: 1.5em 0 0.5em 0;
    letter-spacing: 1px;
}

h3 {
    color: var(--teletext-magenta);
    font-size: 1.5em;
    font-weight: bold;
    margin: 1.2em 0 0.4em 0;
}

h4 {
    color: var(--teletext-cyan);
    font-size: 1.2em;
    font-weight: bold;
    margin: 1em 0 0.3em 0;
}

p {
    color: var(--teletext-text);
    margin-bottom: 1em;
}

/* ============================================
   LINKS
   ============================================ */

a {
    color: var(--teletext-cyan);
    text-decoration: none;
    border-bottom: 1px solid var(--teletext-cyan);
}

a:hover {
    color: var(--teletext-yellow);
    border-bottom-color: var(--teletext-yellow);
    background: rgba(255, 255, 0, 0.1);
}

a:visited {
    color: var(--teletext-magenta);
    border-bottom-color: var(--teletext-magenta);
}

/* ============================================
   TEXT FORMATTING
   ============================================ */

strong, b {
    color: var(--teletext-yellow);
    font-weight: bold;
}

em, i {
    color: var(--teletext-cyan);
    font-style: italic;
}

code {
    background: rgba(0, 255, 0, 0.1);
    color: var(--teletext-yellow);
    padding: 2px 6px;
    border: 1px solid var(--teletext-text);
    font-family: 'Courier New', monospace;
}

pre {
    background: rgba(0, 255, 0, 0.05);
    border: 1px solid var(--teletext-text);
    padding: 20px;
    overflow-x: auto;
    margin: 1em 0;
}

pre code {
    background: none;
    border: none;
    padding: 0;
}

/* ============================================
   LISTS
   ============================================ */

ul, ol {
    margin: 1em 0 1em 2em;
}

ul li {
    list-style: none;
    position: relative;
    padding-left: 1em;
}

ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--teletext-yellow);
}

ol {
    list-style: decimal;
    list-style-position: outside;
}

ol li {
    color: var(--teletext-text);
    padding-left: 0.5em;
}

/* ============================================
   BLOCKQUOTES
   ============================================ */

blockquote {
    border-left: 4px solid var(--teletext-cyan);
    padding-left: 20px;
    margin: 1.5em 0;
    color: var(--teletext-cyan);
    font-style: italic;
}

/* ============================================
   TABLES
   ============================================ */

table {
    width: 100%;
    border-collapse: collapse;
    margin: 2em 0;
    border: 2px solid var(--teletext-cyan);
}

th {
    background: rgba(0, 255, 255, 0.1);
    color: var(--teletext-yellow);
    padding: 12px;
    text-align: left;
    border: 1px solid var(--teletext-cyan);
    font-weight: bold;
}

td {
    padding: 10px 12px;
    border: 1px solid var(--teletext-text);
    color: var(--teletext-text);
}

tr:nth-child(even) {
    background: rgba(0, 255, 0, 0.02);
}

/* ============================================
   HORIZONTAL RULE
   ============================================ */

hr {
    border: none;
    border-top: 2px solid var(--teletext-cyan);
    margin: 2em 0;
    opacity: 0.5;
}

/* ============================================
   BUTTONS / INTERACTIVE ELEMENTS
   ============================================ */

button, .button {
    background: var(--teletext-cyan);
    color: var(--teletext-bg);
    border: 2px solid var(--teletext-cyan);
    padding: 10px 20px;
    font-family: 'Courier New', monospace;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
}

button:hover, .button:hover {
    background: var(--teletext-yellow);
    border-color: var(--teletext-yellow);
    color: var(--teletext-bg);
}

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

.highlight {
    background: var(--teletext-yellow);
    color: var(--teletext-bg);
    padding: 2px 6px;
    font-weight: bold;
}

.error {
    color: var(--teletext-red);
    font-weight: bold;
}

.success {
    color: var(--teletext-text);
    font-weight: bold;
}

.info {
    color: var(--teletext-cyan);
}

.warning {
    color: var(--teletext-yellow);
    font-weight: bold;
}

/* ============================================
   CRT MONITOR EFFECTS
   ============================================ */

/* Scanlines - subtle horizontal lines with gentle drift */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.1),
        rgba(0, 0, 0, 0.1) 1px,
        transparent 1px,
        transparent 2px
    );
    pointer-events: none;
    z-index: 9998;
    animation: scanlineDrift 8s ease-in-out infinite;
}

@keyframes scanlineDrift {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(1px); }
}

/* Screen texture - very subtle RGB pixel grid */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        repeating-linear-gradient(
            90deg,
            rgba(255, 0, 0, 0.015),
            rgba(255, 0, 0, 0.015) 1px,
            rgba(0, 255, 0, 0.015) 1px,
            rgba(0, 255, 0, 0.015) 2px,
            rgba(0, 0, 255, 0.015) 2px,
            rgba(0, 0, 255, 0.015) 3px
        );
    pointer-events: none;
    z-index: 9998;
}

/* CRT Screen overlay - dust, scratches, vignette */
.crt-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    
    /* Stronger vignette effect - darker corners like real CRT */
    background: 
        radial-gradient(
            ellipse at center,
            transparent 0%,
            transparent 30%,
            rgba(0, 0, 0, 0.15) 60%,
            rgba(0, 0, 0, 0.4) 85%,
            rgba(0, 0, 0, 0.7) 100%
        );
    
    /* Screen curvature simulation - more pronounced */
    border-radius: 3% / 4%;
    box-shadow: 
        inset 0 0 120px rgba(0, 0, 0, 0.6),
        inset 0 0 40px rgba(0, 0, 0, 0.4),
        inset 0 0 15px rgba(0, 255, 255, 0.08);
}

/* Dust and scratches layer - very subtle */
.crt-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        /* Dust particles - minimal */
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.015) 0%, transparent 1%),
        radial-gradient(circle at 60% 70%, rgba(255, 255, 255, 0.015) 0%, transparent 1%),
        radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.01) 0%, transparent 1%),
        /* Scratches - very faint */
        linear-gradient(45deg, transparent 48%, rgba(255, 255, 255, 0.005) 49%, rgba(255, 255, 255, 0.005) 51%, transparent 52%);
    background-size: 
        20px 20px,
        30px 30px,
        25px 25px,
        100% 400px;
    background-position:
        20% 30%,
        60% 70%,
        85% 15%,
        0 0;
    opacity: 0.2;
}

/* Screen glare/reflection - subtle shine in top right */
.crt-overlay::after {
    content: '';
    position: absolute;
    top: 5%;
    right: 8%;
    width: 25%;
    height: 30%;
    background: 
        radial-gradient(
            ellipse at center,
            rgba(255, 255, 255, 0.12) 0%,
            rgba(255, 255, 255, 0.06) 40%,
            transparent 70%
        );
    transform: rotate(-15deg);
    opacity: 0.5;
}

/* Phosphor glow - minimal, readable */
h1, h2, header {
    text-shadow: 
        0 0 2px currentColor,
        0 0 4px rgba(0, 255, 255, 0.15);
}

a:hover, strong {
    text-shadow: 
        0 0 1px currentColor,
        0 0 3px rgba(255, 255, 0, 0.2);
}

/* Rare glitch flash animation - happens occasionally */
@keyframes glitchFlash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.97; }
}

/* Bloom trail on scroll - subtle glow that lags slightly */
main {
    will-change: transform;
    transition: filter 0.15s ease-out;
}

main:hover {
    filter: brightness(1.02);
}

/* Subtle overall flicker - very rare, very brief */
@keyframes subtleFlicker {
    0% { opacity: 1; }
    3% { opacity: 0.98; }
    6% { opacity: 1; }
    100% { opacity: 1; }
}

body {
    animation: subtleFlicker 12s infinite;
}

/* Screen bloom effect on colors - toned down */
.teletext-glow {
    filter: 
        brightness(1.05)
        contrast(1.05);
}