/* ============================================================
   munju.club - Sepia-nostalgic dark workshop
   Palette:
     #1A1610 Darkroom Brown (deep bg)
     #1E1812 Bottom warm bg
     #2A2319 Charcoal Sepia (elevated)
     #352D21 Tobacco Paper (surface)
     #D4B896 Amber Glow (primary text)
     #9C8B73 Faded Ink (secondary)
     #C4956A Copper Trace (accent)
     #A8B0A0 Solder Silver (links/highlights)
     #8B3A3A Vacuum Tube Red (alert)
   ============================================================ */

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

:root {
    --bg-deep: #1A1610;
    --bg-bottom: #1E1812;
    --bg-elevated: #2A2319;
    --surface: #352D21;
    --text-primary: #D4B896;
    --text-secondary: #9C8B73;
    --copper: #C4956A;
    --solder: #A8B0A0;
    --tube-red: #8B3A3A;
}

html {
    scroll-behavior: smooth;
    background: var(--bg-deep);
}

body {
    font-family: "Special Elite", "Courier New", monospace;
    color: var(--text-primary);
    background: linear-gradient(180deg, #1A1610 0%, #1C1711 50%, #1E1812 100%);
    line-height: 1.7;
    letter-spacing: 0.04em;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ===================== GRAIN OVERLAY ===================== */
.grain-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
    opacity: 0.05;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.83  0 0 0 0 0.72  0 0 0 0 0.59  0 0 0 0.7 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
    background-size: 200px 200px;
    will-change: transform;
}

/* ===================== LAMP GLOW ===================== */
.lamp-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
    background: radial-gradient(circle, rgba(196, 149, 106, 0.06) 0%, rgba(196, 149, 106, 0.02) 40%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: transform 0.2s ease-out;
    top: 30%;
    left: 50%;
    mix-blend-mode: screen;
}

/* ===================== HANGUL BG ===================== */
.hangul-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.jamo {
    position: absolute;
    font-family: "Caveat", cursive;
    font-size: 200px;
    color: var(--copper);
    opacity: 0.06;
    user-select: none;
    line-height: 1;
}

/* ===================== CIRCUIT SPINE ===================== */
.circuit-spine {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

#trace-path {
    opacity: 0.6;
}

.solder-pad {
    fill: var(--copper);
    stroke: #1A1610;
    stroke-width: 1;
    transform-origin: center;
    transform-box: fill-box;
    transition: opacity 0.4s ease;
}

.solder-pad.active {
    animation: padPulse 2s ease-in-out infinite;
}

@keyframes padPulse {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 3px var(--copper)); }
    50% { transform: scale(1.15); filter: drop-shadow(0 0 8px var(--copper)); }
}

/* ===================== PCB DECOR ===================== */
.pcb-decor {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
}

/* ===================== MAIN FLOW ===================== */
.trace-flow {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 6vh 8vw 12vh;
}

.station {
    position: relative;
    min-height: 90vh;
    padding: 10vh 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0;
    transform: translateY(20px) rotate(0deg);
    transition: opacity 0.4s ease-out, transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.station.in-view {
    opacity: 1;
}

.station[data-side="left"] {
    width: 60%;
    margin-right: auto;
}

.station[data-side="right"] {
    width: 60%;
    margin-left: auto;
    text-align: left;
}

/* ===================== STATION META ===================== */
.station-meta {
    font-family: "IBM Plex Mono", monospace;
    font-size: 12px;
    font-weight: 300;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 28px;
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.meta-right {
    justify-content: flex-end;
}

.meta-label, .meta-coord {
    display: inline-block;
}

.meta-coord {
    color: var(--copper);
}

/* ===================== TYPOGRAPHY ===================== */
.heading {
    font-family: "Caveat", cursive;
    font-size: clamp(48px, 7vw, 96px);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: 0.01em;
    margin-bottom: 36px;
    text-shadow: 0 0 22px rgba(212, 184, 150, 0.18);
}

.body {
    font-family: "Special Elite", "Courier New", monospace;
    font-size: 18px;
    line-height: 1.7;
    letter-spacing: 0.04em;
    color: var(--text-primary);
    margin-bottom: 22px;
    max-width: 60ch;
}

.body.small {
    font-size: 16px;
    color: var(--text-secondary);
}

/* Typewriter cursor */
.typewriter {
    display: inline-block;
}

.typewriter::after {
    content: "_";
    display: inline-block;
    color: var(--text-primary);
    opacity: 0.85;
    margin-left: 2px;
    animation: blink 0.53s steps(2, start) infinite;
}

.typewriter.done::after {
    display: none;
}

@keyframes blink {
    0%, 49% { opacity: 0.85; }
    50%, 100% { opacity: 0; }
}

.typo-strike {
    position: relative;
    display: inline-block;
    color: var(--tube-red);
}

.typo-strike::after {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 50%;
    height: 2px;
    background: var(--tube-red);
    transform-origin: left;
    animation: strike 0.18s ease-out forwards;
}

@keyframes strike {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
}

/* ===================== STATION 01: BOOT ===================== */
.station-01 .wordmark {
    font-family: "Caveat", cursive;
    font-size: clamp(80px, 13vw, 180px);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: 0.005em;
    margin-bottom: 24px;
    display: flex;
    align-items: baseline;
    gap: 8px;
    text-shadow: 0 0 32px rgba(212, 184, 150, 0.2);
}

.wordmark-cursor {
    display: inline-block;
    width: 0.45em;
    height: 1em;
    background: var(--text-primary);
    opacity: 0.8;
    animation: blink 0.53s steps(2, start) infinite;
    transform: translateY(0.05em);
}

.hangul-mark {
    font-family: "Caveat", cursive;
    font-size: 64px;
    color: var(--copper);
    opacity: 0.7;
    margin-bottom: 32px;
    letter-spacing: 0.1em;
    display: flex;
    gap: 0.18em;
}

.hangul-char {
    display: inline-block;
    transform: rotate(-3deg);
}

.hangul-char:nth-child(2) { transform: rotate(2deg); }

.lede {
    font-family: "Special Elite", monospace;
    font-size: clamp(18px, 1.8vw, 22px);
    line-height: 1.7;
    color: var(--text-primary);
    max-width: 56ch;
    margin-bottom: 48px;
}

.diode-arrow {
    width: 24px;
    height: 36px;
    margin-top: 24px;
    animation: arrowPulse 2.4s ease-in-out infinite;
}

.diode-arrow svg {
    width: 100%;
    height: 100%;
    transform: rotate(90deg);
}

@keyframes arrowPulse {
    0%, 100% { transform: translateY(0); opacity: 0.6; }
    50% { transform: translateY(8px); opacity: 1; }
}

/* ===================== ANNOTATIONS ===================== */
.annotation {
    position: absolute;
    font-family: "Caveat", cursive;
    color: var(--text-secondary);
    pointer-events: none;
    z-index: 4;
}

.annotation-01 {
    bottom: 18%;
    right: -20%;
    width: 200px;
    transform: rotate(8deg);
}

.annotation-02 {
    top: 8%;
    left: -8%;
    width: 120px;
    transform: rotate(-12deg);
}

.annotation-04 {
    bottom: 12%;
    right: -10%;
    width: 80px;
    transform: rotate(6deg);
}

.annotation-svg {
    width: 100%;
    height: auto;
    overflow: visible;
}

.annotation-text {
    display: block;
    font-size: 26px;
    color: var(--text-secondary);
    transform: rotate(-4deg);
    margin-top: 4px;
    letter-spacing: 0.02em;
}

.annotation-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(8deg);
    font-size: 48px;
    color: var(--tube-red);
    font-weight: 700;
    margin-top: 0;
}

/* ===================== STATION 02: CHIP FRAME ===================== */
.chip-frame {
    position: relative;
    background: var(--bg-elevated);
    border: 1.5px solid var(--copper);
    padding: 56px 48px;
    border-radius: 4px;
    box-shadow:
        0 0 0 1px rgba(196, 149, 106, 0.2),
        0 24px 60px rgba(0, 0, 0, 0.5),
        inset 0 0 40px rgba(196, 149, 106, 0.04);
}

.chip-pin {
    position: absolute;
    background: var(--copper);
    width: 16px;
    height: 6px;
    border-radius: 1px;
}

.chip-pin-1 { top: 30px; left: -16px; }
.chip-pin-2 { top: 50%; left: -16px; transform: translateY(-50%); }
.chip-pin-3 { bottom: 30px; left: -16px; }
.chip-pin-4 { top: 30px; right: -16px; }
.chip-pin-5 { top: 50%; right: -16px; transform: translateY(-50%); }
.chip-pin-6 { bottom: 30px; right: -16px; }

.chip-label {
    position: absolute;
    top: 12px;
    right: 16px;
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--copper);
    text-transform: uppercase;
}

/* Capacitor divider */
.capacitor-divider {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 32px 0 16px;
}

.capacitor-divider span {
    display: block;
    width: 3px;
    height: 36px;
    background: var(--copper);
    opacity: 0.6;
}

/* ===================== STATION 03: BENCH GRID ===================== */
.bench-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 56px;
    margin-top: 32px;
    margin-bottom: 40px;
}

.bench-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.bench-item:nth-child(1) { transform: rotate(-1deg); }
.bench-item:nth-child(2) { transform: rotate(0.8deg); }
.bench-item:nth-child(3) { transform: rotate(1.4deg); }
.bench-item:nth-child(4) { transform: rotate(-1.6deg); }

.bench-text {
    flex: 1;
    font-family: "Special Elite", monospace;
    font-size: 16px;
    line-height: 1.65;
    color: var(--text-primary);
    margin: 0;
}

.resistor-zigzag {
    width: 240px;
    margin: 24px 0 0;
    opacity: 0.5;
}

/* ===================== KEY CAP ===================== */
.key-cap {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid #4a3d2a;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "IBM Plex Mono", monospace;
    font-weight: 500;
    font-size: 22px;
    color: var(--text-primary);
    box-shadow:
        0 4px 0 #1a140c,
        0 6px 10px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(212, 184, 150, 0.08);
    cursor: pointer;
    transition: transform 0.08s ease-out, box-shadow 0.08s ease-out;
    user-select: none;
    text-transform: uppercase;
}

.key-cap:hover, .key-cap.pressed {
    transform: translateY(2px);
    box-shadow:
        0 2px 0 #1a140c,
        0 3px 6px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(212, 184, 150, 0.08);
}

.key-cap.small {
    width: 38px;
    height: 38px;
    font-size: 15px;
    border-radius: 4px;
    box-shadow:
        0 3px 0 #1a140c,
        0 4px 6px rgba(0, 0, 0, 0.5);
}

.key-cap.small.key-dot {
    width: 24px;
}

.key-row {
    display: flex;
    gap: 6px;
    margin: 32px 0;
    flex-wrap: wrap;
}

/* ===================== STATION 04: NOTES ===================== */
.margin-stack {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 32px;
    max-width: 60ch;
}

.margin-note {
    border-left: 2px solid var(--copper);
    padding: 8px 0 8px 28px;
    position: relative;
}

.margin-note-1 { transform: rotate(-1.2deg); }
.margin-note-2 { transform: rotate(0.8deg); margin-left: 32px; }

.margin-handwrite {
    display: block;
    font-family: "Caveat", cursive;
    font-size: 28px;
    color: var(--text-primary);
    line-height: 1.3;
    letter-spacing: 0.01em;
}

.margin-cite {
    display: block;
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    margin-top: 14px;
    font-style: normal;
}

/* ===================== STATION 05: CRT ===================== */
.crt-frame {
    background: linear-gradient(180deg, #2c241a 0%, #1f1a13 100%);
    border: 1px solid #3d3225;
    border-radius: 18px;
    padding: 28px;
    margin-top: 32px;
    max-width: 640px;
    box-shadow:
        0 30px 60px rgba(0, 0, 0, 0.6),
        inset 0 0 40px rgba(0, 0, 0, 0.5);
    position: relative;
}

.crt-screen {
    background: radial-gradient(ellipse at center, #1a1812 0%, #0e0a06 100%);
    border-radius: 12px;
    padding: 28px 32px;
    border: 2px solid #14110b;
    box-shadow: inset 0 0 60px rgba(196, 149, 106, 0.08), inset 0 0 4px rgba(212, 184, 150, 0.2);
    position: relative;
    overflow: hidden;
    min-height: 240px;
}

/* CRT scanlines */
.crt-screen::before {
    content: "";
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent 0,
        transparent 2px,
        rgba(0, 0, 0, 0.18) 2px,
        rgba(0, 0, 0, 0.18) 3px
    );
    pointer-events: none;
    z-index: 2;
}

.crt-flicker {
    position: absolute;
    inset: 0;
    background: rgba(196, 149, 106, 0.04);
    pointer-events: none;
    z-index: 3;
    animation: crtFlicker 4s infinite;
}

@keyframes crtFlicker {
    0%, 96%, 100% { opacity: 0; }
    97% { opacity: 0.4; }
    98% { opacity: 0; }
    99% { opacity: 0.6; }
}

.crt-line {
    font-family: "IBM Plex Mono", monospace;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-primary);
    text-shadow: 0 0 4px rgba(212, 184, 150, 0.4), 0 0 12px rgba(212, 184, 150, 0.2);
    margin-bottom: 4px;
    position: relative;
    z-index: 1;
    letter-spacing: 0.05em;
}

.cursor-blink {
    display: inline-block;
    color: var(--text-primary);
    animation: blink 0.53s steps(2, start) infinite;
    font-weight: 700;
}

.crt-controls {
    display: flex;
    gap: 18px;
    align-items: center;
    margin-top: 20px;
    padding: 0 12px;
}

.dial {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #5a4a35, #2a2319);
    border: 1px solid #1a140c;
    box-shadow: inset 0 -2px 4px rgba(0,0,0,0.6), 0 2px 4px rgba(0,0,0,0.5);
    position: relative;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.dial::after {
    content: "";
    position: absolute;
    top: 4px;
    left: 50%;
    width: 2px;
    height: 8px;
    background: var(--copper);
    transform: translateX(-50%);
}

.dial-2::after { transform: translateX(-50%) rotate(120deg); transform-origin: 50% 12px; }

.toggle-switch {
    width: 16px;
    height: 28px;
    background: var(--copper);
    border-radius: 3px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255,255,255,0.1);
    margin-left: auto;
}

/* ===================== STATION 07: SIGNOFF ===================== */
.signoff-block {
    text-align: center;
    margin: 0 auto;
    width: 100%;
    max-width: 720px;
    padding: 60px 0;
    position: relative;
}

.signoff-head {
    margin-top: 24px;
}

.signoff-text {
    font-size: 20px;
    line-height: 1.7;
    color: var(--text-primary);
    margin: 0 auto 48px;
    max-width: 50ch;
}

/* Vacuum tube */
.vacuum-tube {
    width: 90px;
    height: 160px;
    margin: 0 auto 24px;
    position: relative;
}

.tube-glass {
    width: 80px;
    height: 120px;
    margin: 0 auto;
    background: linear-gradient(180deg,
        rgba(139, 58, 58, 0.15) 0%,
        rgba(139, 58, 58, 0.4) 30%,
        rgba(139, 58, 58, 0.6) 60%,
        rgba(139, 58, 58, 0.3) 100%);
    border: 1px solid rgba(212, 184, 150, 0.25);
    border-radius: 40px 40px 8px 8px;
    box-shadow:
        inset 0 0 30px rgba(139, 58, 58, 0.4),
        0 0 30px rgba(139, 58, 58, 0.5);
    position: relative;
    overflow: hidden;
}

.tube-filament {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 50%;
    background: var(--copper);
    box-shadow: 0 0 12px var(--copper), 0 0 24px var(--tube-red);
    animation: filamentGlow 3s ease-in-out infinite;
}

.tube-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 60%, rgba(196, 149, 106, 0.4), transparent 70%);
    animation: filamentGlow 3s ease-in-out infinite;
}

@keyframes filamentGlow {
    0%, 100% { opacity: 0.85; }
    50% { opacity: 1; }
}

.tube-base {
    width: 60px;
    height: 30px;
    margin: 0 auto;
    background: linear-gradient(180deg, #4a3d2a 0%, #2a2319 100%);
    border-radius: 0 0 6px 6px;
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    padding-bottom: 4px;
    border: 1px solid #1a140c;
}

.tube-pin {
    width: 4px;
    height: 14px;
    background: var(--copper);
    border-radius: 0 0 2px 2px;
    box-shadow: 0 1px 0 #1a140c;
}

.footer-meta {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 40px;
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.trace-terminator {
    width: 60px;
    height: 60px;
    margin: 32px auto 0;
    opacity: 0.75;
    animation: padPulse 3s ease-in-out infinite;
}

/* ===================== SCROLL INDICATOR ===================== */
.scroll-indicator {
    position: fixed;
    right: 32px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    pointer-events: none;
}

.scroll-indicator::before {
    content: "";
    width: 1px;
    height: 200px;
    background: rgba(196, 149, 106, 0.18);
}

.indicator-fill {
    position: absolute;
    top: 0;
    width: 1px;
    height: 0;
    background: var(--copper);
    box-shadow: 0 0 6px var(--copper);
    transition: height 0.1s linear;
}

.indicator-label {
    font-family: "IBM Plex Mono", monospace;
    font-size: 10px;
    letter-spacing: 0.25em;
    color: var(--text-secondary);
    writing-mode: vertical-rl;
    text-orientation: mixed;
    margin-top: 16px;
    text-transform: uppercase;
}

/* ===================== STATION ROTATIONS (mounted) ===================== */
.station.in-view[data-rotation="-1.5"] { transform: translateY(0) rotate(-1.5deg); }
.station.in-view[data-rotation="2"]    { transform: translateY(0) rotate(2deg); }
.station.in-view[data-rotation="-2"]   { transform: translateY(0) rotate(-2deg); }
.station.in-view[data-rotation="1.5"]  { transform: translateY(0) rotate(1.5deg); }
.station.in-view[data-rotation="-1"]   { transform: translateY(0) rotate(-1deg); }
.station.in-view[data-rotation="2.5"]  { transform: translateY(0) rotate(2.5deg); }
.station.in-view[data-rotation="-0.5"] { transform: translateY(0) rotate(-0.5deg); }

/* solder-flash burst */
.solder-flash {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--copper);
    pointer-events: none;
    animation: solderFlash 0.6s ease-out forwards;
    z-index: 10;
}

@keyframes solderFlash {
    0% { opacity: 0.7; transform: scale(0.4); box-shadow: 0 0 0 0 rgba(196,149,106,0.6); }
    60% { opacity: 0.5; transform: scale(2); box-shadow: 0 0 0 18px rgba(196,149,106,0); }
    100% { opacity: 0; transform: scale(2.4); }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
    .grain-overlay { display: none; }
    .lamp-glow { display: none; }
    .pcb-decor { opacity: 0.25; }

    .trace-flow {
        padding: 4vh 6vw 8vh;
    }

    .station,
    .station[data-side="left"],
    .station[data-side="right"] {
        width: 100%;
        margin: 0;
        min-height: auto;
        padding: 6vh 0;
        transform: none !important;
    }

    .station.in-view {
        transform: translateY(0) !important;
    }

    .station-meta {
        font-size: 10px;
        gap: 12px;
        margin-bottom: 20px;
    }

    .meta-right { justify-content: flex-start; }

    .heading {
        font-size: clamp(36px, 9vw, 56px);
        margin-bottom: 24px;
    }

    .body { font-size: 16px; }

    .station-01 .wordmark {
        font-size: clamp(56px, 16vw, 96px);
    }

    .hangul-mark { font-size: 48px; }

    .chip-frame {
        padding: 32px 24px;
    }

    .chip-pin { display: none; }

    .bench-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .bench-item { transform: none !important; }

    .annotation { display: none; }

    .crt-frame { padding: 16px; }
    .crt-screen { padding: 18px 18px; min-height: 200px; }
    .crt-line { font-size: 12px; }

    .scroll-indicator { right: 12px; }
    .scroll-indicator::before { height: 120px; }

    .signoff-text { font-size: 17px; }
    .footer-meta { font-size: 10px; gap: 8px; }

    .margin-handwrite { font-size: 22px; }
    .margin-note-2 { margin-left: 0; }
}

@media (max-width: 480px) {
    .key-cap { width: 44px; height: 44px; font-size: 18px; }
    .key-cap.small { width: 32px; height: 32px; font-size: 13px; }
    .vacuum-tube { width: 70px; height: 130px; }
    .tube-glass { width: 64px; height: 96px; }
}