/* monopole.ai — holographic 3D physics visualization */

:root {
    --vacuum-dark: #050510;
    --field-dark: #0a0a2a;
    --monopole-violet: #7c3aed;
    --monopole-red: #ef4444;
    --field-cyan: #06b6d4;
    --particle-white: #e0e0f0;
    --panel-surface: #1a1a4a;

    --font-display: "Outfit", system-ui, sans-serif;
    --font-body: "Lexend", system-ui, sans-serif;
    --font-mono: "Fira Code", ui-monospace, monospace;

    --scroll-pct: 0;
    --mouse-x: 0.5;
    --mouse-y: 0.5;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.75;
    color: var(--particle-white);
    background-color: var(--vacuum-dark);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 20%, rgba(124, 58, 237, 0.06), transparent 60%),
        radial-gradient(ellipse 80% 60% at 80% 80%, rgba(6, 182, 212, 0.04), transparent 60%),
        radial-gradient(ellipse 60% 60% at 60% 40%, rgba(239, 68, 68, 0.03), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

/* ======================= Compass ======================= */
.compass {
    position: fixed;
    top: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(10, 10, 42, 0.7);
    border: 1px solid rgba(124, 58, 237, 0.4);
    box-shadow:
        0 0 24px rgba(124, 58, 237, 0.25),
        inset 0 0 12px rgba(6, 182, 212, 0.12);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.compass-ring {
    position: absolute;
    inset: 6px;
    border-radius: 50%;
    border: 1px dashed rgba(224, 224, 240, 0.18);
}

.compass-needle {
    position: absolute;
    width: 2px;
    height: 38px;
    top: 50%;
    left: 50%;
    transform-origin: 50% 50%;
    transform: translate(-50%, -50%) rotate(calc(var(--scroll-pct) * 360deg));
    background: linear-gradient(
        to bottom,
        var(--monopole-violet) 0%,
        var(--monopole-violet) 45%,
        rgba(255, 255, 255, 0.6) 50%,
        var(--monopole-red) 55%,
        var(--monopole-red) 100%
    );
    border-radius: 2px;
    box-shadow:
        0 0 8px rgba(124, 58, 237, 0.6),
        0 0 8px rgba(239, 68, 68, 0.4);
    transition: transform 0.08s linear;
}

.compass-center {
    position: absolute;
    width: 5px;
    height: 5px;
    background: var(--particle-white);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--field-cyan);
}

.compass-label {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 0.55rem;
    color: rgba(224, 224, 240, 0.6);
    letter-spacing: 0.05em;
}

.compass-n {
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--monopole-violet);
}

.compass-s {
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--monopole-red);
}

/* ======================= Header ======================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 50;
    background: linear-gradient(180deg, rgba(5, 5, 16, 0.7) 0%, transparent 100%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: 0.02em;
}

.brand-mark {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, var(--monopole-violet), var(--field-dark) 80%);
    box-shadow:
        0 0 12px var(--monopole-violet),
        inset 0 0 4px rgba(255, 255, 255, 0.2);
    animation: monopole-pulse 4s ease-in-out infinite;
}

@keyframes monopole-pulse {
    0%, 100% {
        box-shadow:
            0 0 12px var(--monopole-violet),
            inset 0 0 4px rgba(255, 255, 255, 0.2);
    }
    50% {
        box-shadow:
            0 0 22px var(--monopole-violet),
            0 0 36px rgba(124, 58, 237, 0.4),
            inset 0 0 6px rgba(255, 255, 255, 0.4);
    }
}

.brand-text {
    color: var(--particle-white);
}

.brand-dot {
    color: var(--monopole-violet);
}

.nav {
    display: flex;
    gap: 1.75rem;
}

.nav a {
    color: rgba(224, 224, 240, 0.7);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: lowercase;
    transition: color 0.2s ease;
    position: relative;
    padding-bottom: 2px;
}

.nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--field-cyan), transparent);
    transform: scaleX(0);
    transition: transform 0.25s ease;
}

.nav a:hover {
    color: var(--field-cyan);
}

.nav a:hover::after {
    transform: scaleX(1);
}

/* ======================= Sections ======================= */
.section {
    position: relative;
    min-height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem;
    overflow: hidden;
}

/* ======================= Hero ======================= */
.section-hero {
    min-height: 100vh;
    text-align: center;
}

.hero-field {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.hero-field-lines {
    position: absolute;
    inset: 0;
    background:
        repeating-conic-gradient(
            from calc(var(--scroll-pct) * 30deg),
            transparent 0deg,
            transparent 14deg,
            rgba(124, 58, 237, 0.08) 14deg,
            rgba(124, 58, 237, 0.08) 15deg
        );
    mask-image: radial-gradient(circle at center, black 0%, black 50%, transparent 90%);
    -webkit-mask-image: radial-gradient(circle at center, black 0%, black 50%, transparent 90%);
}

.hero-field-shimmer {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.12) 0%, transparent 30%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
    mix-blend-mode: screen;
    animation: shimmer-breathe 8s ease-in-out infinite;
}

@keyframes shimmer-breathe {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.hero-core {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--monopole-violet);
    transform: translate(-50%, -50%);
    box-shadow:
        0 0 20px var(--monopole-violet),
        0 0 40px rgba(124, 58, 237, 0.6),
        0 0 80px rgba(124, 58, 237, 0.3);
    z-index: 2;
}

.hero-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid var(--monopole-violet);
    transform: translate(-50%, -50%);
    animation: pulse-out 3s ease-out infinite;
    z-index: 1;
}

@keyframes pulse-out {
    0% {
        width: 8px;
        height: 8px;
        opacity: 1;
        border-width: 2px;
    }
    100% {
        width: 480px;
        height: 480px;
        opacity: 0;
        border-width: 0.5px;
    }
}

.hero-content {
    position: relative;
    z-index: 5;
    max-width: 760px;
    padding: 2rem;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(224, 224, 240, 0.7);
    margin-bottom: 2rem;
    padding: 0.55rem 1.1rem;
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 999px;
    background: rgba(10, 10, 42, 0.5);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(3rem, 9vw, 7rem);
    line-height: 1;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
    background: linear-gradient(
        135deg,
        var(--particle-white) 0%,
        var(--monopole-violet) 35%,
        var(--field-cyan) 65%,
        var(--monopole-red) 100%
    );
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: hero-shimmer 12s ease-in-out infinite;
    text-shadow: 0 0 60px rgba(124, 58, 237, 0.3);
}

@keyframes hero-shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.title-accent {
    color: var(--monopole-violet);
    -webkit-text-fill-color: var(--monopole-violet);
}

.hero-tagline {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(1.1rem, 2.4vw, 1.5rem);
    line-height: 1.4;
    color: var(--particle-white);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.hero-sub {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.75;
    color: rgba(224, 224, 240, 0.75);
    max-width: 540px;
    margin: 0 auto 2.5rem;
}

.hero-meta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: rgba(224, 224, 240, 0.7);
}

.meta-row {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(10, 10, 42, 0.6);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: 4px;
    padding: 0.35rem 0.8rem;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.meta-key {
    color: var(--field-cyan);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.7rem;
}

.meta-arrow {
    color: rgba(224, 224, 240, 0.4);
}

.meta-val {
    color: var(--particle-white);
}

.pulse-text {
    animation: text-pulse 2.5s ease-in-out infinite;
}

@keyframes text-pulse {
    0%, 100% { color: var(--particle-white); }
    50% { color: var(--monopole-red); }
}

.scroll-hint {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    z-index: 5;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(224, 224, 240, 0.4);
}

.scroll-hint-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--monopole-violet));
    animation: scroll-hint 2s ease-in-out infinite;
}

@keyframes scroll-hint {
    0%, 100% { transform: scaleY(0.4); transform-origin: top; opacity: 0.3; }
    50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
}

/* ======================= Atmospheric backgrounds ======================= */
.atmos-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.atmos-bg-radial {
    background:
        repeating-conic-gradient(
            from 45deg at 80% 30%,
            transparent 0deg,
            transparent 18deg,
            rgba(124, 58, 237, 0.05) 18deg,
            rgba(124, 58, 237, 0.05) 19deg
        ),
        radial-gradient(circle at 80% 30%, rgba(124, 58, 237, 0.18) 0%, transparent 40%);
}

.atmos-bg-violet {
    background:
        radial-gradient(ellipse at 30% 50%, rgba(124, 58, 237, 0.18) 0%, transparent 50%),
        linear-gradient(135deg, rgba(124, 58, 237, 0.06), transparent 60%);
}

.atmos-bg-red {
    background:
        radial-gradient(ellipse at 70% 50%, rgba(239, 68, 68, 0.15) 0%, transparent 50%),
        linear-gradient(225deg, rgba(239, 68, 68, 0.05), transparent 60%);
}

.atmos-bg-shimmer {
    background: linear-gradient(
        135deg,
        rgba(124, 58, 237, 0.08),
        rgba(6, 182, 212, 0.08),
        rgba(239, 68, 68, 0.08),
        rgba(124, 58, 237, 0.08)
    );
    background-size: 300% 300%;
    animation: holographic-shift 14s ease-in-out infinite;
}

@keyframes holographic-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.atmos-bg-grid {
    background-image:
        linear-gradient(rgba(6, 182, 212, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(6, 182, 212, 0.08) 1px, transparent 1px),
        radial-gradient(ellipse at 50% 50%, rgba(124, 58, 237, 0.12) 0%, transparent 60%);
    background-size: 80px 80px, 80px 80px, 100% 100%;
    background-position: 0 0, 0 0, center;
}

.atmos-bg-deep {
    background:
        radial-gradient(circle at 20% 80%, rgba(124, 58, 237, 0.18) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.12) 0%, transparent 40%),
        linear-gradient(180deg, transparent 0%, rgba(10, 10, 42, 0.6) 100%);
}

.atmos-bg-radial-fine {
    background:
        repeating-conic-gradient(
            from calc(var(--scroll-pct) * -180deg),
            transparent 0deg,
            transparent 11deg,
            rgba(124, 58, 237, 0.05) 11deg,
            rgba(124, 58, 237, 0.05) 12deg
        ),
        radial-gradient(circle at center, rgba(124, 58, 237, 0.1) 0%, transparent 60%);
    mask-image: radial-gradient(circle at center, black 30%, transparent 90%);
    -webkit-mask-image: radial-gradient(circle at center, black 30%, transparent 90%);
}

.field-lines {
    position: absolute;
    inset: 0;
    opacity: 0.6;
}

.field-lines-north {
    background: repeating-conic-gradient(
        from calc(90deg + var(--scroll-pct) * 60deg) at 30% 50%,
        transparent 0deg,
        transparent 16deg,
        rgba(124, 58, 237, 0.12) 16deg,
        rgba(124, 58, 237, 0.12) 17deg
    );
    mask-image: radial-gradient(circle at 30% 50%, black 0%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(circle at 30% 50%, black 0%, black 30%, transparent 70%);
}

.field-lines-south {
    background: repeating-conic-gradient(
        from calc(-90deg - var(--scroll-pct) * 60deg) at 70% 50%,
        transparent 0deg,
        transparent 16deg,
        rgba(239, 68, 68, 0.12) 16deg,
        rgba(239, 68, 68, 0.12) 17deg
    );
    mask-image: radial-gradient(circle at 70% 50%, black 0%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(circle at 70% 50%, black 0%, black 30%, transparent 70%);
}

/* ======================= Panels ======================= */
.panel {
    position: relative;
    z-index: 5;
    background: rgba(26, 26, 74, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(124, 58, 237, 0.15);
    border-radius: 8px;
    padding: 3rem;
    max-width: 680px;
    margin: 0 auto;
    overflow: hidden;
}

.panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(124, 58, 237, 0.05),
        rgba(6, 182, 212, 0.05),
        rgba(239, 68, 68, 0.05)
    );
    background-size: 200% 200%;
    animation: panel-shimmer 16s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes panel-shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.panel-wide {
    max-width: 920px;
}

.panel-narrow {
    max-width: 540px;
    text-align: center;
}

.kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(224, 224, 240, 0.7);
    margin-bottom: 1.25rem;
}

.panel-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2rem, 5vw, 3.25rem);
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--particle-white);
    margin-bottom: 1.5rem;
}

.panel-body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.75;
    color: rgba(224, 224, 240, 0.85);
    margin-bottom: 1.25rem;
}

.panel-body:last-child {
    margin-bottom: 0;
}

.panel-footnote {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: rgba(224, 224, 240, 0.5);
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(124, 58, 237, 0.15);
}

/* ======================= Pole indicator dots ======================= */
.dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.dot-north {
    background: var(--monopole-violet);
    box-shadow: 0 0 10px var(--monopole-violet), 0 0 4px rgba(255, 255, 255, 0.5);
}

.dot-south {
    background: var(--monopole-red);
    box-shadow: 0 0 10px var(--monopole-red), 0 0 4px rgba(255, 255, 255, 0.5);
}

.dot-cyan {
    background: var(--field-cyan);
    box-shadow: 0 0 10px var(--field-cyan), 0 0 4px rgba(255, 255, 255, 0.5);
}

/* ======================= Equation blocks ======================= */
.equation {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.85;
    color: var(--field-cyan);
    background: rgba(5, 5, 16, 0.6);
    border: 1px solid rgba(6, 182, 212, 0.25);
    border-radius: 6px;
    padding: 1.4rem 1.6rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    position: relative;
}

.equation::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(
        to bottom,
        var(--monopole-violet),
        var(--field-cyan),
        var(--monopole-red)
    );
    border-radius: 6px 0 0 6px;
}

.equation code {
    white-space: pre;
    color: var(--particle-white);
}

.equation-large {
    font-size: 0.95rem;
    line-height: 2.1;
}

.eq-comment {
    color: rgba(124, 58, 237, 0.85);
    font-style: italic;
}

/* ======================= Method panel rows ======================= */
.panel-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.panel-col {
    background: rgba(5, 5, 16, 0.5);
    border: 1px solid rgba(124, 58, 237, 0.15);
    border-radius: 6px;
    padding: 1.5rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.panel-col:hover {
    transform: translateY(-3px);
    border-color: rgba(6, 182, 212, 0.35);
}

.col-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(224, 224, 240, 0.8);
    margin-bottom: 0.75rem;
}

.col-body {
    font-family: var(--font-body);
    font-size: 0.92rem;
    line-height: 1.65;
    color: rgba(224, 224, 240, 0.7);
}

/* ======================= Research list ======================= */
.research-list {
    list-style: none;
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.research-item {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 1.25rem;
    align-items: start;
    padding: 1rem 0;
    border-top: 1px solid rgba(124, 58, 237, 0.15);
}

.research-item:first-child {
    border-top: none;
    padding-top: 0;
}

.research-tag {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--field-cyan);
    padding: 0.3rem 0.7rem;
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.25);
    border-radius: 4px;
    text-align: center;
    white-space: nowrap;
}

.research-item p {
    font-family: var(--font-body);
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(224, 224, 240, 0.8);
}

/* ======================= Closing signoff ======================= */
.signoff {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    margin-top: 2rem;
    padding: 0.6rem 1.1rem;
    background: rgba(5, 5, 16, 0.6);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 4px;
}

.signoff-key {
    color: var(--field-cyan);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.7rem;
}

.signoff-arrow {
    color: rgba(224, 224, 240, 0.4);
}

.signoff-val {
    color: var(--particle-white);
}

/* ======================= Footer ======================= */
.site-footer {
    position: relative;
    z-index: 5;
    padding: 2.5rem 2.5rem 2rem;
    border-top: 1px solid rgba(124, 58, 237, 0.18);
    background: rgba(5, 5, 16, 0.7);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: rgba(224, 224, 240, 0.5);
    letter-spacing: 0.05em;
}

.footer-brand {
    color: var(--particle-white);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
}

.footer-coord {
    color: var(--field-cyan);
}

/* ======================= Responsive ======================= */
@media (max-width: 768px) {
    .site-header {
        padding: 1rem 1.25rem;
    }

    .nav {
        gap: 1rem;
    }

    .nav a {
        font-size: 0.7rem;
    }

    .compass {
        top: 1rem;
        right: 1rem;
        width: 44px;
        height: 44px;
    }

    .compass-needle {
        height: 28px;
    }

    .section {
        padding: 6rem 1.25rem;
    }

    .panel {
        padding: 2rem 1.5rem;
    }

    .panel-row {
        grid-template-columns: 1fr;
    }

    .research-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .research-tag {
        justify-self: start;
    }

    .equation {
        font-size: 0.75rem;
        padding: 1rem;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .nav {
        display: none;
    }

    .hero-eyebrow {
        font-size: 0.65rem;
        padding: 0.4rem 0.8rem;
    }

    .hero-meta {
        font-size: 0.75rem;
    }
}

/* ======================= Reveal on scroll ======================= */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.9s ease, transform 0.9s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}