/* ============================================
   ViSiON/3 BBS - Project Website Styles
   Retro BBS aesthetic, modern layout
   ============================================ */

@font-face {
    font-family: 'IBM VGA';
    src: url('fonts/WebPlus_IBM_VGA_8x16.woff') format('woff');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111118;
    --bg-card: #15151f;
    --text-primary: #c8c8d4;
    --text-secondary: #9999b0;
    --text-heading: #e0e0f0;
    --blue-bright: #4466ff;
    --blue-glow: #3355dd;
    --blue-dark: #1a1a4e;
    --cyan-accent: #44ccdd;
    --border-color: #252540;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
    --font-dos: 'IBM VGA', 'Courier New', monospace;
    --font-body: 'IBM Plex Mono', -apple-system, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: #000000;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    overflow-x: hidden;
    overflow-y: auto;
}

.crt-frame {
    max-width: calc(100vh * 4 / 3);
    margin: 0 auto;
    background-color: var(--bg-primary);
    min-height: 100vh;
    isolation: isolate;
}

/* CRT vignette - dark edges, bright center */
.crt-vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9997;
    background: radial-gradient(
        ellipse at center,
        transparent 60%,
        rgb(0 0 0 / 0.25) 85%,
        rgb(0 0 0 / 0.55) 100%
    );
}

/* VHS tracking distortion band */
.crt-vhs {
    position: fixed;
    left: -5px;
    width: calc(100% + 10px);
    height: 4px;
    pointer-events: none;
    z-index: 9998;
    background: linear-gradient(
        90deg,
        transparent,
        rgb(68 102 255 / 0.08),
        rgb(255 255 255 / 0.03),
        transparent
    );
    animation: vhs-tracking 25s linear infinite;
    opacity: 0;
}

/* Phosphor flicker - subtle brightness pulse overlay */
.phosphor-flicker {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9996;
    background: rgba(0, 0, 0, 0);
    animation: phosphor-flicker 4s ease-in-out infinite;
}

/* Scanline overlay - visible static lines */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.08) 0px,
        rgba(0, 0, 0, 0.08) 1px,
        transparent 1px,
        transparent 3px
    );
}

/* Animated CRT sweep line */
.scanlines::after {
    content: '';
    position: fixed;
    top: -100%;
    left: 0;
    width: 100%;
    height: 8px;
    background: linear-gradient(
        180deg,
        transparent,
        rgba(68, 102, 255, 0.06),
        transparent
    );
    animation: scanline-sweep 8s linear infinite;
    pointer-events: none;
}

@keyframes scanline-sweep {
    0% { top: -1%; }
    100% { top: 101%; }
}

/* Phosphor flicker - subtle brightness pulse */
@keyframes phosphor-flicker {
    0%, 100% { background: rgba(0, 0, 0, 0); }
    50% { background: rgba(0, 0, 0, 0.03); }
}

/* VHS tracking - rare horizontal distortion band */
@keyframes vhs-tracking {
    0%, 92% { top: -10px; opacity: 0; }
    93% { opacity: 1; }
    94% { top: 15%; opacity: 1; transform: translateX(-3px); }
    95% { top: 35%; transform: translateX(2px); }
    96% { top: 55%; transform: translateX(-2px); }
    97% { top: 75%; transform: translateX(1px); }
    98% { top: 95%; opacity: 1; }
    99% { top: 101%; opacity: 0; }
    100% { top: 101%; opacity: 0; }
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ---- BBS Nav Bar ---- */
.bbs-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.6rem 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.bbs-nav .container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.nav-item {
    color: var(--text-secondary);
}

.nav-bracket {
    color: #00aaaa;
}

.nav-key {
    color: #55ffff;
    font-weight: 700;
}

.nav-item a {
    text-decoration: none;
}

.nav-item a:hover span {
    color: #55ffff;
}

.nav-item a:focus-visible {
    outline: 2px solid var(--cyan-accent);
    outline-offset: 2px;
}

/* ---- Hero ---- */
.hero {
    text-align: center;
    padding: 6rem 0 4rem;
}

.hero-logo {
    max-width: 1000px;
    width: 100%;
    height: auto;
    filter: drop-shadow(0 0 30px rgba(68, 102, 255, 0.4))
            drop-shadow(0 0 60px rgba(68, 102, 255, 0.2));
    margin-bottom: 2rem;
}

.tagline {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-family: var(--font-dos);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ---- Sections ---- */
section {
    padding: 4rem 0;
}

section:nth-of-type(even) {
    background-color: var(--bg-secondary);
}

/* ---- ANSI Art Headers ---- */
.ansi-header {
    font-family: var(--font-mono);
    line-height: 1.15;
    margin-bottom: 1.5rem;
    white-space: pre;
    font-size: 0.85rem;
    user-select: none;
}

.ansi-header .row-1 { color: #5555ff; }
.ansi-header .row-2 { color: #5555ff; }
.ansi-header .row-3 { color: #5555ff; }

/* ---- Message Base Posts ---- */
.msg-post {
    max-width: 100%;
}

.msg-header {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.msg-number {
    color: #cc4444;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
}

.msg-number-of {
    color: #aa0000;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.msg-bracket {
    color: #aa00aa;
}

.msg-label {
    color: #ff55ff;
}

.msg-value {
    color: var(--text-heading);
}

.msg-line {
    display: block;
    overflow: hidden;
}

.msg-right {
    float: right;
}

.msg-body {
    margin-top: 0.5rem;
}

.msg-body p {
    margin-bottom: 1rem;
    font-family: var(--font-dos);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ---- About ---- */
.about p {
    margin-bottom: 1rem;
}

.tribute {
    font-family: var(--font-mono);
    font-style: italic;
    color: var(--cyan-accent);
    margin-top: 1.5rem;
}

/* ---- History ---- */
.history p {
    margin-bottom: 1rem;
}

.lineage {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--cyan-accent);
    text-align: center;
    margin: 2rem 0;
    letter-spacing: 0.5px;
}

.lineage strong {
    color: var(--blue-bright);
    text-shadow: 0 0 10px rgba(68, 102, 255, 0.4);
}

.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.screenshot-gallery img {
    width: 100%;
    height: auto;
    border: 1px solid var(--border-color);
    border-radius: 0;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.screenshot-gallery img:hover {
    border-color: var(--blue-bright);
    box-shadow: 0 0 15px rgba(68, 102, 255, 0.15);
}

.screenshot-caption {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 0.25rem;
}

.history-links {
    margin-top: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-align: center;
}

.history-links a {
    text-decoration: none;
    margin-right: 1.5rem;
}

.history-links a:hover span {
    text-decoration: underline;
}

/* ---- BBS Menu Items (Features) ---- */
.bbs-menu {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem 3rem;
}

.bbs-menu-item {
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.menu-header {
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.menu-bracket {
    color: #00aaaa;
}

.menu-key {
    color: #55ffff;
    font-weight: 700;
}

.menu-title {
    font-weight: 600;
}

.fade-1 { color: #ffffff; text-shadow: 0 0 8px rgba(255, 255, 255, 0.6), 0 0 20px rgba(255, 255, 255, 0.3); }
.fade-2 { color: #aaaaaa; text-shadow: 0 0 5px rgba(170, 170, 170, 0.2); }
.fade-3 { color: #555555; }

.cfade-1 { color: #ffffff; text-shadow: 0 0 8px rgba(255, 255, 255, 0.6), 0 0 20px rgba(255, 255, 255, 0.3); }
.cfade-2 { color: #55ffff; text-shadow: 0 0 6px rgba(85, 255, 255, 0.35), 0 0 16px rgba(85, 255, 255, 0.15); }
.cfade-3 { color: #00aaaa; text-shadow: 0 0 4px rgba(0, 170, 170, 0.2); }
.cfade-4 { color: #555555; }

.menu-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    font-family: var(--font-dos);
}

/* ---- Get Involved ---- */
.get-involved .cta-buttons {
    text-align: center;
}

.get-involved .contact {
    text-align: center;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    padding: 0.75rem 2rem;
    border-radius: 0;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--blue-bright);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--blue-glow);
    box-shadow: 0 0 20px rgba(68, 102, 255, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--blue-bright);
    border: 1px solid var(--blue-bright);
}

.btn-secondary:hover {
    background-color: var(--blue-dark);
    box-shadow: 0 0 20px rgba(68, 102, 255, 0.2);
}

.contact {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact a {
    color: var(--cyan-accent);
    text-decoration: none;
}

.contact a:hover {
    text-decoration: underline;
}

/* ---- Footer ---- */
.site-footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-links {
    margin-top: 1rem;
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.footer-links a {
    color: var(--blue-bright);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

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

/* ---- Responsive ---- */
@media (width <= 600px) {
    .hero { padding: 4rem 0 3rem; }
    .hero-logo { max-width: 220px; }
    .tagline { font-size: 1.1rem; }
    section { padding: 3rem 0; }
    .ansi-header { display: none; }
    .bbs-menu { grid-template-columns: 1fr; }
    .cta-buttons { flex-direction: column; align-items: center; }
}

/* ---- Scroll fade-in ---- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---- Focus styles ---- */
.btn:focus-visible,
.footer-links a:focus-visible,
.contact a:focus-visible,
.history-links a:focus-visible {
    outline: 2px solid var(--cyan-accent);
    outline-offset: 2px;
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .fade-in {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .scanlines { background: none; }
    .scanlines::after { animation: none; }
    .phosphor-flicker { animation: none; }
    .crt-vignette { display: none; }
    .crt-vhs { display: none; }
    .telix-cursor { animation: none; }
}

/* ---- Telix Splash Screen ---- */
.telix-splash {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000000;
    z-index: 9995;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.telix-splash:focus-visible {
    outline: 2px solid #55ffff;
    outline-offset: -4px;
}

.telix-screen {
    max-width: calc(100vh * 4 / 3);
    width: 100%;
    height: 100vh;
    background: #000000;
    display: flex;
    flex-direction: column;
    position: relative;
    margin: 0 auto;
}

.telix-terminal {
    flex: 1;
    padding: 1rem;
    font-family: var(--font-dos);
    font-size: 1rem;
    line-height: 1.6;
    color: #aaaaaa;
    white-space: pre-wrap;
    overflow: hidden;
    text-align: left;
    word-break: break-all;
}

.telix-prompt {
    color: #aaaaaa;
    display: block;
}

.telix-cursor {
    color: #aaaaaa;
    animation: telix-blink 0.8s step-end infinite;
}

@keyframes telix-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.telix-status-bar {
    font-family: var(--font-dos);
    font-size: 0.85rem;
    background: #aa0000;
    color: #ffff55;
    padding: 0 0.5rem;
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
}

.telix-splash.hidden {
    display: none;
}

/* Lock scroll while splash is visible */
body.splash-active {
    overflow: hidden;
}

/* ---- Splash mobile ---- */
@media (width <= 600px) {
    .telix-terminal {
        font-size: 0.8rem;
        line-height: 1.5;
        padding: 0.75rem;
    }

    .telix-status-bar {
        font-size: 0.65rem;
        padding: 0 0.25rem;
    }
}