:root {
    --green:   #00ff41;
    --cyan:    #00f3ff;
    --purple:  #bc13fe;
    --gold:    #ffd200;
    --orange:  #ff6b00;
    --magenta: #ff0080;
    --dark:    #000000;
}

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

html, body {
    background: #000;
    font-family: 'Rajdhani', 'Noto Sans TC', sans-serif;
    color: #fff;
    overflow: hidden;
    height: 100%;
}

/* ── Fixed background canvases ── */
#green-canvas, #star-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    transition: opacity 0.6s ease;
}
#star-canvas { opacity: 0; }

/* ── 漣漪專用 canvas（全頁通用）── */
#ripple-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2;
    pointer-events: none;
}

/* ── Scroll container ── */
.scroll-container {
    position: relative;
    z-index: 1;
    height: 100vh;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    pointer-events: auto;
    -webkit-user-select: none;
    user-select: none;
}

section {
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    scroll-snap-align: start;
    position: relative;
    padding: 20px;
}

/* ── Hero ── */
.hero-content { text-align: center; z-index: 2; }

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 900;
    letter-spacing: 0.15em;
    color: #ffffff;
    text-shadow:
            0 0 0px #fff,
            0 0 10px #fff,
            0 0 25px var(--green),
            0 0 55px var(--green),
            0 0 100px var(--green),
            0 0 180px rgba(0,255,65,.4);
    animation: flicker 6s infinite;
    will-change: opacity, transform;
}

@keyframes flicker {
    0%, 93%, 95.5%, 97.5%, 100% { opacity: 1; }
    94%    { opacity: .55; }
    95%    { opacity: 1; }
    96%    { opacity: .3; }
    97%    { opacity: 1; }
    98%    { opacity: .7; }
    99%    { opacity: 1; }
}

.hero-sub {
    margin-top: 20px;
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    color: rgba(255,255,255,.75);
    letter-spacing: .18em;
    text-shadow: 0 0 12px rgba(0,255,65,.35);
    min-height: 2em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.typewriter-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--green);
    margin-left: 3px;
    vertical-align: middle;
    box-shadow: 0 0 8px var(--green);
    animation: blink .75s step-end infinite;
}

.typewriter-chaos {
    animation: type-glitch 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) both infinite;
    position: relative;
    text-shadow: 2px 0 0 rgba(255, 0, 64, 0.5), -2px 0 0 rgba(0, 243, 255, 0.5);
}

@keyframes type-glitch {
    0% { transform: translate(0) }
    20% { transform: translate(-2px, 1px) }
    40% { transform: translate(-2px, -1px) }
    60% { transform: translate(2px, 1px) }
    80% { transform: translate(2px, -1px) }
    100% { transform: translate(0) }
}

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

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,.45);
    font-size: .75rem;
    letter-spacing: .25em;
    text-align: center;
    animation: bob 2.2s ease-in-out infinite;
}
@keyframes bob {
    0%,100% { transform: translateX(-50%) translateY(0); opacity:.45; }
    50%      { transform: translateX(-50%) translateY(-10px); opacity:.9; }
}

/* ── Game Cards ── */
.game-card {
    --mx: 50%;
    --my: 50%;
    max-width: 820px;
    width: 100%;
    padding: 44px 48px;
    background: rgba(5, 15, 8, 0.45);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(0, 255, 65, 0.25);
    border-radius: 22px;
    box-shadow:
            0 8px 48px rgba(0,0,0,.8),
            0 0 18px rgba(0,255,65,.18),
            inset 0 0 30px rgba(0,255,65,.04);
    transition: transform .4s cubic-bezier(.25,.8,.25,1), border-color .4s, box-shadow .4s;
    position: relative;
    overflow: hidden;
}

.game-card::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0,255,65,.18), transparent);
    transition: .55s ease;
}
.game-card:hover::before { left: 110%; }

.game-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 22px;
    background: radial-gradient(
            320px circle at var(--mx, 50%) var(--my, 50%),
            rgba(0,255,65,.10) 0%,
            transparent 65%
    );
    opacity: 0;
    transition: opacity .3s;
    pointer-events: none;
}
.game-card:hover::after { opacity: 1; }

.game-card:hover {
    transform: translateY(-10px) scale(1.016);
    border-color: rgba(0,255,65,.85);
    box-shadow:
            0 24px 70px rgba(0,255,65,.22),
            0 0 40px rgba(0,243,255,.18),
            inset 0 0 50px rgba(0,255,65,.08);
}

.game-card:hover .card-title { text-shadow: 0 0 18px rgba(0,255,65,.5); }
.game-card:hover .accent-green { text-shadow: 0 0 22px rgba(0,255,65,.9); }

/* ── Space-theme cards ── */
.game-card--space {
    background: rgba(5, 5, 20, 0.45);
    border-color: rgba(0, 243, 255, 0.2);
    box-shadow:
            0 8px 48px rgba(0,0,0,.8),
            0 0 18px rgba(188,19,254,.15),
            inset 0 0 30px rgba(188,19,254,.04);
}
.game-card--space::before {
    background: linear-gradient(90deg, transparent, rgba(0,243,255,.18), transparent);
}
.game-card--space::after {
    background: radial-gradient(
            320px circle at var(--mx, 50%) var(--my, 50%),
            rgba(0,243,255,.12) 0%,
            rgba(188,19,254,.06) 40%,
            transparent 65%
    );
}
.game-card--space:hover {
    border-color: rgba(0,243,255,.85);
    box-shadow:
            0 24px 70px rgba(0,243,255,.25),
            0 0 40px rgba(188,19,254,.25),
            inset 0 0 50px rgba(0,243,255,.08);
}
.game-card--space:hover .card-title { text-shadow: 0 0 18px rgba(0,243,255,.5); }
.game-card--space:hover .accent-gold { text-shadow: 0 0 22px rgba(255,210,0,.9); }

/* ── Tags ── */
.card-tag {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 50px;
    font-size: .78rem;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: .12em;
    margin-bottom: 18px;
    font-weight: 600;
    transition: box-shadow .3s, border-color .3s;
}
.tag-green  {
    background: rgba(0,255,65,.1); color: var(--green);
    border: 1px solid rgba(0,255,65,.4);
    box-shadow: 0 0 8px rgba(0,255,65,.25);
}
.game-card:hover .tag-green {
    border-color: rgba(0,255,65,.9);
    box-shadow: 0 0 16px rgba(0,255,65,.55), 0 0 32px rgba(0,255,65,.2);
}
.tag-cyan   {
    background: rgba(0,243,255,.1); color: var(--cyan);
    border: 1px solid rgba(0,243,255,.4);
    box-shadow: 0 0 8px rgba(0,243,255,.25);
}
.tag-gold   {
    background: rgba(255,210,0,.1); color: var(--gold);
    border: 1px solid rgba(255,210,0,.4);
    box-shadow: 0 0 8px rgba(255,210,0,.25);
}
.tag-space-gold {
    background: rgba(255,210,0,.08); color: var(--gold);
    border: 1px solid rgba(255,210,0,.35);
    box-shadow: 0 0 8px rgba(255,210,0,.2);
}
.game-card--space:hover .tag-space-gold {
    border-color: rgba(255,210,0,.9);
    box-shadow: 0 0 16px rgba(255,210,0,.55), 0 0 32px rgba(188,19,254,.2);
}

/* ── Title & desc ── */
.card-title {
    font-family: 'Orbitron', 'Noto Sans TC', sans-serif;
    font-size: clamp(1.4rem, 3.5vw, 2.1rem);
    font-weight: 700;
    margin-bottom: 14px;
    line-height: 1.3;
    transition: text-shadow .3s;
}
.card-title .accent-green  { color: var(--green); transition: text-shadow .3s; }
.card-title .accent-cyan   { color: var(--cyan);  transition: text-shadow .3s; }
.card-title .accent-gold   { color: var(--gold);  transition: text-shadow .3s; }

.card-desc {
    font-size: 1.08rem;
    line-height: 1.85;
    color: rgba(255,255,255,.65);
    margin-bottom: 32px;
    transition: color .3s;
}
.game-card:hover .card-desc        { color: rgba(255,255,255,.82); }
.game-card--space:hover .card-desc { color: rgba(200,240,255,.82); }

/* ── CTA buttons ── */
.cta-btn {
    display: inline-block;
    padding: 13px 38px;
    font-family: 'Orbitron', sans-serif;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .18em;
    text-transform: uppercase;
    text-decoration: none;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: color .25s, box-shadow .25s, transform .2s;
}
.cta-btn:hover { transform: scale(1.05); }
.cta-btn::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 0;
    transition: height .28s ease;
    z-index: -1;
}

.btn-green {
    color: var(--green);
    border: 1px solid var(--green);
    box-shadow: 0 0 10px rgba(0,255,65,.35), inset 0 0 12px rgba(0,255,65,.05);
}
.btn-green::after  { background: linear-gradient(90deg, #00ff41, #00f3ff); }
.btn-green:hover   {
    color: #000;
    box-shadow: 0 0 30px rgba(0,255,65,.8), 0 0 60px rgba(0,243,255,.3);
    border-color: #00f3ff;
}

.btn-cyan {
    color: var(--cyan);
    border: 1px solid var(--cyan);
    box-shadow: 0 0 10px rgba(0,243,255,.35), inset 0 0 12px rgba(0,243,255,.05);
}
.btn-cyan::after   { background: linear-gradient(90deg, #00f3ff, #bc13fe); }
.btn-cyan:hover    {
    color: #000;
    box-shadow: 0 0 30px rgba(0,243,255,.8), 0 0 60px rgba(188,19,254,.3);
    border-color: #bc13fe;
}

.btn-gold {
    color: var(--gold);
    border: 1px solid var(--gold);
    box-shadow: 0 0 10px rgba(255,210,0,.35), inset 0 0 12px rgba(255,210,0,.05);
}
.btn-gold::after   { background: linear-gradient(90deg, #ffd200, #bc13fe); }
.btn-gold:hover    {
    color: #000;
    box-shadow: 0 0 30px rgba(255,210,0,.8), 0 0 60px rgba(188,19,254,.3);
    border-color: #bc13fe;
}

.cta-btn:hover::after { height: 100%; }

/* ── Nav Dots ── */
.nav-dots {
    position: fixed;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.dot {
    width: 9px; height: 9px;
    background: transparent;
    border: 2px solid rgba(255,255,255,.25);
    border-radius: 50%;
    cursor: pointer;
    transition: .3s;
}
.dot:hover, .dot.active {
    background: var(--green);
    border-color: var(--green);
    box-shadow: 0 0 12px var(--green), 0 0 24px rgba(0,243,255,.5);
    transform: scale(1.35);
}
.dot.space-dot.active {
    background: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 12px var(--cyan), 0 0 24px rgba(188,19,254,.6);
}
.dot.chaos-dot.active {
    background: var(--magenta);
    border-color: var(--magenta);
    box-shadow: 0 0 14px var(--magenta), 0 0 28px rgba(255,107,0,.5);
}

/* ══════════════════════════════════════
   CHAOS SECTION (last page)
══════════════════════════════════════ */
.chaos-section {
    flex-direction: column;
    gap: 0;
    background: transparent;
}

#conway-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.chaos-ui {
    position: relative;
    z-index: 5;
    text-align: center;
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.chaos-eyebrow {
    font-family: 'Orbitron', sans-serif;
    font-size: .72rem;
    letter-spacing: .35em;
    color: rgba(255,0,128,.6);
    text-transform: uppercase;
}

.chaos-title {
    font-family: 'Orbitron', 'Noto Sans TC', sans-serif;
    font-size: clamp(2.8rem, 9vw, 6.5rem);
    font-weight: 900;
    line-height: 1;
    letter-spacing: .08em;
    background: linear-gradient(135deg, #ff6b00, #ff0080, #bc13fe, #ff6b00);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradShift 4s ease infinite;
    filter: drop-shadow(0 0 30px rgba(255,0,128,.5));
}
@keyframes gradShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.chaos-sub {
    font-size: 1.05rem;
    letter-spacing: .1em;
    color: rgba(255,255,255,.5);
    max-width: 480px;
}

.chaos-seed-btn {
    margin-top: 8px;
    padding: 14px 44px;
    font-family: 'Orbitron', sans-serif;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .2em;
    text-transform: uppercase;
    border: 1px solid var(--magenta);
    color: var(--magenta);
    background: rgba(255,0,128,.06);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: color .3s, box-shadow .3s, background .3s;
    backdrop-filter: blur(6px);
}
.chaos-seed-btn::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 0;
    background: var(--magenta);
    transition: height .3s;
    z-index: -1;
}
.chaos-seed-btn:hover {
    color: #000;
    box-shadow: 0 0 30px rgba(255,0,128,.7);
}
.chaos-seed-btn:hover::after { height: 100%; }

.chaos-stats {
    display: flex;
    gap: 32px;
    font-family: 'Orbitron', sans-serif;
    font-size: .65rem;
    letter-spacing: .12em;
    color: rgba(255,165,0,.5);
}
.stat-item { text-align: center; }
.stat-value { display: block; font-size: 1.4rem; font-weight: 700; color: var(--orange); text-shadow: 0 0 10px var(--orange); }

.chaos-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(0,0,0,.06) 2px,
            rgba(0,0,0,.06) 4px
    );
    pointer-events: none;
    z-index: 2;
}

.corner {
    position: absolute;
    z-index: 6;
    width: 60px; height: 60px;
    pointer-events: none;
}
.corner-tl { top: 20px; left: 20px; border-top: 2px solid var(--magenta); border-left: 2px solid var(--magenta); opacity: .6; }
.corner-tr { top: 20px; right: 20px; border-top: 2px solid var(--orange); border-right: 2px solid var(--orange); opacity: .6; }
.corner-bl { bottom: 20px; left: 20px; border-bottom: 2px solid var(--orange); border-left: 2px solid var(--orange); opacity: .6; }
.corner-br { bottom: 20px; right: 20px; border-bottom: 2px solid var(--magenta); border-right: 2px solid var(--magenta); opacity: .6; }

/* ── Glitch overlay canvas (hero section) ── */
#glitch-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 3;
    mix-blend-mode: screen;
    opacity: 0;
    transition: opacity .15s;
}

.hero-title-wrap {
    position: relative;
    display: inline-block;
}
.hero-title-wrap::before,
.hero-title-wrap::after {
    content: attr(data-text);
    font-family: 'Orbitron', sans-serif;
    font-size: inherit;
    font-weight: 900;
    letter-spacing: 0.15em;
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
}
.hero-title-wrap::before {
    color: #ff0040;
    clip-path: polygon(0 15%, 100% 15%, 100% 35%, 0 35%);
}
.hero-title-wrap::after {
    color: #00f3ff;
    clip-path: polygon(0 55%, 100% 55%, 100% 75%, 0 75%);
}
.hero-title-wrap.glitching::before {
    opacity: .85;
    animation: rgb-shift-r .12s steps(1) infinite;
}
.hero-title-wrap.glitching::after {
    opacity: .85;
    animation: rgb-shift-b .12s steps(1) infinite;
}
@keyframes rgb-shift-r {
    0%  { transform: translateX(-4px) skewX(-1deg); clip-path: polygon(0 5%,  100% 5%,  100% 25%, 0 25%); }
    25% { transform: translateX(5px)  skewX(2deg);  clip-path: polygon(0 40%, 100% 40%, 100% 60%, 0 60%); }
    50% { transform: translateX(-6px) skewX(-3deg); clip-path: polygon(0 70%, 100% 70%, 100% 85%, 0 85%); }
    75% { transform: translateX(3px)  skewX(1deg);  clip-path: polygon(0 20%, 100% 20%, 100% 45%, 0 45%); }
    100%{ transform: translateX(-2px) skewX(-2deg); clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%); }
}
@keyframes rgb-shift-b {
    0%  { transform: translateX(5px)  skewX(2deg);  clip-path: polygon(0 55%, 100% 55%, 100% 70%, 0 70%); }
    25% { transform: translateX(-4px) skewX(-2deg); clip-path: polygon(0 10%, 100% 10%, 100% 30%, 0 30%); }
    50% { transform: translateX(7px)  skewX(3deg);  clip-path: polygon(0 75%, 100% 75%, 100% 90%, 0 90%); }
    75% { transform: translateX(-5px) skewX(-1deg); clip-path: polygon(0 35%, 100% 35%, 100% 55%, 0 55%); }
    100%{ transform: translateX(3px)  skewX(2deg);  clip-path: polygon(0 0%,  100% 0%,  100% 20%, 0 20%); }
}

.hero-title-wrap.glitching .hero-title {
    animation: flicker 6s infinite, shake .08s steps(2) infinite;
}
@keyframes shake {
    0%  { transform: translateX(0); }
    25% { transform: translateX(-3px) skewX(-1deg); }
    50% { transform: translateX(4px)  skewX(2deg); }
    75% { transform: translateX(-2px) skewX(-2deg); }
    100%{ transform: translateX(3px)  skewX(1deg); }
}

@media (max-width: 768px) {
    .game-card { padding: 28px 24px; }
    .card-title { font-size: 1.3rem; }
    .nav-dots { right: 10px; }
    .chaos-stats { gap: 18px; font-size: .6rem; }
}