:root {
    --paper: #FAF7EE;
    --cream: #F5EDCF;
    --ink: #1A1A1A;
    --muted: rgba(26,26,26,0.65);
    --red: #E30613;
    --olive: #556B2F;
    --olive-dark: #3E5121;
    --teal: #0ABAB5;
    --mustard: #C9A238;
    --burgundy: #7B2438;
    --line: rgba(85,107,47,0.15);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', sans-serif;
    background: var(--paper);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.55;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 56px;
}

/* HERO */
.hero {
    text-align: center;
    padding: 90px 0 60px;
    border-bottom: 1px solid var(--line);
}
.hero .logo-big {
    height: 140px;
    margin-bottom: 40px;
}
.hero .eyebrow {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 500;
    margin-bottom: 18px;
}
.hero h1 {
    font-family: 'Playfair Display', serif;
    font-weight: 500;
    font-size: 68px;
    line-height: 1.05;
    color: var(--ink);
    letter-spacing: -0.015em;
    max-width: 900px;
    margin: 0 auto 20px;
}
.hero h1 em {
    font-style: italic;
    color: var(--olive-dark);
}
.hero .sub {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 20px;
    color: var(--olive);
    margin-top: 12px;
}

/* VIDEO SECTION */
.video-section {
    padding: 60px 0 20px;
}
.video-frame {
    max-width: 360px;
    margin: 0 auto;
    aspect-ratio: 9 / 16;
    border-radius: 14px;
    overflow: hidden;
    background: #1A1A1A;
    box-shadow: 0 24px 60px rgba(0,0,0,0.12);
    position: relative;
}
.video-frame video, .video-frame iframe {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: 0;
    display: block;
}
.video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    background: linear-gradient(135deg, #1A1A1A 0%, #2E2A22 100%);
    color: rgba(255,255,255,0.55);
}
.play-icon {
    width: 78px;
    height: 78px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
    padding-left: 6px;
}
.placeholder-label {
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    font-weight: 500;
}

/* EQUATION SECTION */
.equation {
    background: var(--cream);
    padding: 90px 0;
    margin-top: -1px;
}
.eq-eyebrow {
    text-align: center;
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 500;
    margin-bottom: 40px;
}
.eq-grid {
    display: grid;
    grid-template-columns: 1fr auto 1.4fr;
    gap: 40px;
    align-items: center;
    max-width: 1120px;
    margin: 0 auto;
}
.eq-left {
    text-align: center;
}
.eq-left img {
    width: 100%;
    max-width: 340px;
    margin: 0 auto;
    display: block;
}
.eq-left .caption {
    margin-top: 20px;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
}
.eq-left .caption-sub {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 13px;
    color: var(--muted);
    margin-top: 4px;
}
.eq-sign {
    font-family: 'Playfair Display', serif;
    font-size: 82px;
    color: var(--red);
    font-weight: 400;
    line-height: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}
.eq-sign::before, .eq-sign::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--red);
    border-radius: 2px;
}
.eq-right h2 {
    font-family: 'Playfair Display', serif;
    font-weight: 500;
    font-size: 44px;
    line-height: 1.1;
    color: var(--ink);
    letter-spacing: -0.01em;
    margin-bottom: 6px;
}
.eq-right .eq-mini {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 20px;
    color: var(--olive);
    margin-bottom: 30px;
}
.eq-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px 32px;
}
.eq-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding-top: 4px;
}
.eq-item .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}
.eq-item .dot.red { background: var(--red); }
.eq-item .dot.teal { background: var(--teal); }
.eq-item .dot.olive { background: var(--olive); }
.eq-item .dot.mustard { background: var(--mustard); }
.eq-item .txt strong {
    display: block;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 15.5px;
    color: var(--ink);
    line-height: 1.2;
}
.eq-item .txt span {
    display: block;
    font-family: 'Inter', sans-serif;
    font-size: 12.5px;
    color: var(--muted);
    margin-top: 3px;
}

/* SCIENCE SECTION */
.science {
    padding: 100px 0 90px;
    background: var(--paper);
}
.sci-header {
    text-align: center;
    margin-bottom: 60px;
}
.sci-header .eyebrow {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 500;
    margin-bottom: 14px;
}
.sci-header h2 {
    font-family: 'Playfair Display', serif;
    font-weight: 500;
    font-size: 42px;
    line-height: 1.1;
    color: var(--ink);
    letter-spacing: -0.01em;
    max-width: 700px;
    margin: 0 auto;
}

.sci-layout {
    display: grid;
    grid-template-columns: 1fr 380px 1fr;
    gap: 50px;
    align-items: center;
    max-width: 1220px;
    margin: 0 auto;
}
.sci-col {
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.sci-col.left { text-align: right; align-items: flex-end; }
.sci-col.right { text-align: left; align-items: flex-start; }

.sci-fact {
    max-width: 320px;
}
.sci-fact .val {
    font-family: 'Playfair Display', serif;
    font-weight: 500;
    font-size: 46px;
    line-height: 1;
    letter-spacing: -0.015em;
    margin-bottom: 4px;
}
.sci-fact .val.red { color: var(--red); }
.sci-fact .val.olive { color: var(--olive-dark); }
.sci-fact .val.teal { color: var(--teal); }
.sci-fact .val.mustard { color: var(--mustard); }
.sci-fact .val.burgundy { color: var(--burgundy); }
.sci-fact .val em {
    font-style: italic;
}
.sci-fact .title {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 15px;
    color: var(--ink);
    margin-top: 6px;
    line-height: 1.3;
}
.sci-fact .desc {
    font-family: 'Inter', sans-serif;
    font-size: 12.5px;
    color: var(--muted);
    margin-top: 5px;
    line-height: 1.5;
}

.sci-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 26px;
}
.sci-center .pack {
    width: 100%;
    max-width: 320px;
    filter: drop-shadow(0 24px 40px rgba(0,0,0,0.10));
}
.sci-center .niq {
    width: 100%;
    max-width: 240px;
    margin-top: 6px;
}
.sci-center .patents {
    text-align: center;
}
.sci-center .patents .a {
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 600;
}
.sci-center .patents .b {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 14px;
    color: var(--muted);
    margin-top: 4px;
}

/* FOOTER */
footer {
    padding: 40px 0 34px;
    background: var(--olive);
    color: var(--cream);
    margin-top: 40px;
    text-align: center;
}
footer .foot-line {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 20px;
    max-width: 780px;
    margin: 0 auto 24px;
    line-height: 1.4;
}
footer .foot-meta {
    display: flex;
    justify-content: center;
    gap: 40px;
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    font-weight: 500;
    opacity: 0.75;
    padding-top: 20px;
    border-top: 1px solid rgba(245,237,207,0.25);
    max-width: 700px;
    margin: 24px auto 0;
}

/* Responsive */
@media (max-width: 900px) {
    .container { padding: 0 24px; }
    .hero h1 { font-size: 44px; }
    .hero .logo-big { height: 96px; }
    .eq-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
    .eq-sign { flex-direction: row; gap: 20px; }
    .eq-sign::before, .eq-sign::after { display: none; }
    .eq-right h2 { font-size: 30px; }
    .eq-items { grid-template-columns: 1fr; text-align: left; }
    .sci-layout { grid-template-columns: 1fr; gap: 40px; }
    .sci-col.left, .sci-col.right { text-align: center; align-items: center; }
    .sci-header h2 { font-size: 30px; }
    footer .foot-meta { flex-direction: column; gap: 12px; }
}