:root {
    --neon-green: #39ff14;
    --neon-cyan: #00f6ff;
    --neon-yellow: #fff700;
    --hot-pink: #ff2ea1;
    --deep-black: #050607;
    --panel-black: #0b0f12;
    --grid-line: rgba(57, 255, 20, 0.18);
    --text: #e5ffe5;
}

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

body {
    font-family: "Courier New", Courier, monospace;
    color: var(--text);
    background: radial-gradient(circle at top, #0f1a18 0%, #050607 60%, #020303 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background grid */
.bg-grid {
    position: fixed; inset: 0;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 24px, var(--grid-line) 25px),
        repeating-linear-gradient(90deg, transparent, transparent 24px, var(--grid-line) 25px);
    z-index: 0; opacity: 0.5; pointer-events: none;
}

/* Slow scanline */
.rain {
    position: fixed; inset: 0;
    background-image: linear-gradient(180deg, transparent 0%, rgba(57,255,20,0.10) 50%, transparent 100%);
    animation: rain 8s linear infinite;
    opacity: 0.35; z-index: 1; pointer-events: none;
}
@keyframes rain { 0% { transform: translateY(-50%); } 100% { transform: translateY(50%); } }

/* ---- Layout ---- */
.site-header {
    position: relative; z-index: 2;
    text-align: center;
    padding: 2.5rem 1.5rem 2rem;
    border-bottom: 3px double var(--neon-cyan);
    background: linear-gradient(180deg, rgba(0,0,0,0.9), rgba(10,20,20,0.6));
}

h1 {
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    color: var(--neon-green);
    letter-spacing: 3px;
    text-shadow: 0 0 8px rgba(57,255,20,0.6);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1rem;
    color: var(--neon-cyan);
    max-width: 680px;
    margin: 0 auto 1rem;
}

.badge-row {
    display: flex; flex-wrap: wrap;
    justify-content: center; gap: 0.5rem;
}

.badge {
    border: 2px solid var(--hot-pink);
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    color: var(--hot-pink);
    background: rgba(255,46,161,0.15);
}

.blink { animation: blink 1s steps(2,start) infinite; }
@keyframes blink { 50% { opacity: 0; } }

nav.nav {
    position: relative; z-index: 2;
    display: flex; flex-wrap: wrap; gap: 0;
    border-bottom: 2px solid var(--neon-green);
    background: rgba(5,6,7,0.9);
}

nav.nav a {
    color: var(--neon-yellow);
    text-decoration: none;
    padding: 0.65rem 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border-right: 1px solid var(--neon-green);
    transition: background 0.15s;
}

nav.nav a:hover, nav.nav a.active {
    background: rgba(57,255,20,0.15);
    color: var(--neon-green);
}

.wrap {
    position: relative; z-index: 2;
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
    display: flex; flex-direction: column; gap: 2rem;
}

/* ---- Stats row ---- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    position: relative; z-index: 2;
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 0;
}

.stat-box {
    border: 2px solid var(--neon-cyan);
    padding: 1rem;
    text-align: center;
    background: rgba(0,246,255,0.05);
}

.stat-box .number {
    font-size: 2rem;
    color: var(--neon-green);
    font-weight: bold;
    text-shadow: 0 0 6px rgba(57,255,20,0.5);
}

.stat-box .label {
    font-size: 0.75rem;
    color: var(--neon-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.25rem;
}

/* ---- Panels ---- */
.panel {
    background: var(--panel-black);
    border: 2px solid var(--neon-green);
    box-shadow: 0 0 18px rgba(57,255,20,0.2);
    padding: 1.5rem;
}

.panel h2 {
    color: var(--neon-yellow);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.1rem;
}

.panel p { margin-bottom: 0.5rem; line-height: 1.7; }

.panel-cyan {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 14px rgba(0,246,255,0.2);
}

.panel-cyan h2 { color: var(--neon-cyan); }

/* ---- Grid helpers ---- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* ---- Cards ---- */
.card {
    border: 2px solid var(--neon-cyan);
    padding: 1.1rem;
    background: rgba(0,246,255,0.05);
}

.card h3 {
    color: var(--neon-green);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.95rem;
}

.card p { font-size: 0.9rem; line-height: 1.6; }

/* ---- Nav cards (index page) ---- */
.nav-card {
    border: 2px solid var(--neon-yellow);
    padding: 1.5rem;
    background: rgba(255,247,0,0.04);
    text-decoration: none;
    color: var(--text);
    display: block;
    transition: background 0.15s, box-shadow 0.15s;
}

.nav-card:hover {
    background: rgba(255,247,0,0.10);
    box-shadow: 0 0 14px rgba(255,247,0,0.25);
}

.nav-card .nav-label {
    color: var(--neon-yellow);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.nav-card .nav-desc { font-size: 0.9rem; line-height: 1.6; }
.nav-card .arrow { color: var(--neon-yellow); float: right; font-size: 1.4rem; }

/* ---- Formula / code blocks ---- */
.formula {
    background: rgba(0,0,0,0.6);
    border: 1px solid var(--neon-cyan);
    padding: 0.75rem 1.2rem;
    font-size: 1rem;
    color: var(--neon-yellow);
    text-align: center;
    margin: 0.75rem 0;
    letter-spacing: 1px;
}

.code-block {
    background: rgba(0,0,0,0.55);
    border: 1px solid var(--hot-pink);
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    color: var(--neon-yellow);
    overflow-x: auto;
    white-space: pre;
}

/* ---- Scenario section (rvh page) ---- */
.scenario {
    border: 2px solid var(--neon-green);
    background: var(--panel-black);
    padding: 1.5rem;
    box-shadow: 0 0 14px rgba(57,255,20,0.15);
}

.scenario h2 {
    color: var(--neon-yellow);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1rem;
    margin-bottom: 0.4rem;
}

.scenario .desc {
    font-size: 0.9rem;
    color: var(--neon-cyan);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.chart-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 0.75rem;
}

.chart-box img {
    width: 100%;
    border: 1px solid var(--neon-green);
    display: block;
}

.chart-box .cap {
    font-size: 0.75rem;
    color: var(--neon-cyan);
    text-align: center;
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ---- Wafer evolution page ---- */
.era-panel {
    border: 2px solid var(--neon-cyan);
    background: var(--panel-black);
    padding: 1.5rem;
}

.era-panel h2 {
    color: var(--neon-yellow);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.25rem;
}

.era-meta {
    font-size: 0.85rem;
    color: var(--neon-cyan);
    margin-bottom: 1rem;
    display: flex; flex-wrap: wrap; gap: 1rem;
}

.era-meta span { border: 1px solid var(--neon-cyan); padding: 0.15rem 0.5rem; }

.wafer-pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.wafer-pair img {
    width: 100%;
    border: 1px solid var(--neon-green);
    background: white;
}

.wafer-pair .cap {
    font-size: 0.75rem;
    color: var(--neon-cyan);
    text-align: center;
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ---- Full-width image ---- */
.img-full img {
    width: 100%;
    border: 2px solid var(--neon-green);
    background: white;
}

.img-full .cap {
    font-size: 0.8rem;
    color: var(--neon-cyan);
    text-align: center;
    margin-top: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ---- Key result callout ---- */
.callout {
    border: 3px solid var(--hot-pink);
    background: rgba(255,46,161,0.08);
    padding: 1.25rem 1.5rem;
    text-align: center;
}

.callout .big { font-size: 2.5rem; color: var(--hot-pink); font-weight: bold; }
.callout .label { color: var(--neon-yellow); text-transform: uppercase; letter-spacing: 1px; font-size: 0.9rem; }
.callout .note { font-size: 0.85rem; color: var(--text); margin-top: 0.5rem; }

/* ---- Table ---- */
.tbl {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.tbl th, .tbl td {
    border: 1px solid var(--neon-green);
    padding: 0.5rem 0.75rem;
    text-align: left;
}

.tbl th { background: rgba(57,255,20,0.18); color: var(--neon-yellow); }
.tbl td { color: var(--text); }
.tbl tr:hover td { background: rgba(57,255,20,0.06); }

/* ---- Footer ---- */
.site-footer {
    position: relative; z-index: 2;
    text-align: center;
    padding: 2rem 1rem 3rem;
    border-top: 3px double var(--neon-cyan);
    background: rgba(0,0,0,0.85);
    color: #888;
    font-size: 0.85rem;
}

.site-footer a {
    color: var(--neon-cyan);
    text-decoration: none;
    border-bottom: 1px dashed var(--neon-cyan);
}

@media (max-width: 640px) {
    .wafer-pair { grid-template-columns: 1fr; }
    .chart-row { grid-template-columns: 1fr; }
    nav.nav a { padding: 0.5rem 0.75rem; font-size: 0.8rem; }
}