@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400..900;1,400..900&family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
  --white: #FFFFFF;
  --off-white: #FAFAFA;
  --bg: #FFFFFF;
  --purple: #3E205E;
  --purple-light: #5A3580;
  --purple-soft: rgba(62,32,94,0.05);
  --gold: #C09A53;
  --gold-light: #D4B068;
  --green: #1A5C3A;
  --green-light: #2A7A50;
  --green-soft: rgba(26,92,58,0.05);
  --text-primary: #1A1A1A;
  --text-secondary: #555;
  --text-muted: #888;
  --border: #E8E8E8;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.06);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);
  --radius: 16px;
  --radius-sm: 8px;
  --font-head: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  --max-w: 1200px;
  --section-pad: 140px 0;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--text-primary); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 40px; }
.section-label { font-size: 13px; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); margin-bottom: 16px; }
.section-title { font-family: var(--font-head); font-size: 52px; font-weight: 600; line-height: 1.15; color: var(--purple); margin-bottom: 24px; }
.section-subtitle { font-size: 18px; color: var(--text-secondary); line-height: 1.7; max-width: 640px; font-weight: 300; }

/* ===== ANIMATIONS ===== */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.9s cubic-bezier(0.16,1,0.3,1), transform 0.9s cubic-bezier(0.16,1,0.3,1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }
.reveal-delay-4 { transition-delay: 0.6s; }

/* Float animation for cards */
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes pulse-glow { 0%,100% { box-shadow: 0 0 0 0 rgba(192,154,83,0); } 50% { box-shadow: 0 0 30px 4px rgba(192,154,83,0.15); } }
@keyframes spin-slow { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes dash { to { stroke-dashoffset: 0; } }

/* DNA Helix Background */
.dna-bg { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; opacity: 0.06; }

/* ===== NAVBAR ===== */
.navbar { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 20px 0; transition: all 0.4s ease; }
.navbar.scrolled { background: rgba(255,255,255,0.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); box-shadow: 0 1px 0 rgba(0,0,0,0.06); padding: 14px 0; }
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.nav-logo-link { display: inline-flex; cursor: pointer; }
.nav-logo-placeholder { width: 140px; height: 40px; border: 2px dashed var(--border); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 11px; color: var(--text-muted); background: rgba(255,255,255,0.8); }
.nav-logo { height: 56px; width: auto; object-fit: contain; display: block; }
.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-secondary); transition: color 0.3s; }
.nav-links a:hover { color: var(--purple); }
.nav-cta { background: var(--purple); color: var(--white) !important; padding: 10px 24px; border-radius: 100px; font-size: 13px !important; font-weight: 600 !important; letter-spacing: 0.5px; transition: all 0.3s !important; }
.nav-cta:hover { background: var(--purple-light); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(62,32,94,0.25); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); margin: 5px 0; transition: 0.3s; }

/* ===== HERO ===== */
.hero { height: 100vh; min-height: 700px; position: relative; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(135deg, rgba(255,255,255,0.96) 0%, rgba(255,255,255,0.88) 40%, rgba(255,255,255,0.3) 70%, transparent 100%); }
.hero-content { position: relative; z-index: 2; max-width: 600px; }
.hero-label { font-size: 12px; font-weight: 600; letter-spacing: 4px; text-transform: uppercase; color: var(--gold); margin-bottom: 24px; }
.hero-title { font-family: var(--font-head); font-size: 60px; font-weight: 600; line-height: 1.1; color: var(--purple); margin-bottom: 24px; }
.hero-title em { font-style: italic; color: var(--gold); }
.hero-subtitle { font-size: 19px; color: var(--text-primary); line-height: 1.7; margin-bottom: 40px; font-weight: 400; background: rgba(255,255,255,0.6); padding: 16px 20px; border-radius: 12px; border-left: 4px solid var(--gold); }
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary { background: var(--purple); color: var(--white); padding: 16px 36px; border-radius: 100px; font-size: 14px; font-weight: 600; letter-spacing: 0.5px; transition: all 0.3s; border: none; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.btn-primary:hover { background: var(--purple-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(62,32,94,0.25); }
.btn-primary--green { background: var(--green); }
.btn-primary--green:hover { background: var(--green-light); box-shadow: 0 8px 24px rgba(26,92,58,0.25); }
.btn-secondary { background: transparent; color: var(--purple); padding: 16px 36px; border-radius: 100px; font-size: 14px; font-weight: 600; border: 2px solid var(--purple); cursor: pointer; display: inline-flex; align-items: center; gap: 8px; transition: all 0.3s; }
.btn-secondary:hover { background: var(--purple); color: var(--white); }

/* ===== SCIENCE ===== */
.science { padding: var(--section-pad); background: var(--bg); position: relative; }
.science-header { text-align: center; margin-bottom: 80px; }
.science-header .section-subtitle { margin: 0 auto; }
.science-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 40px; }
.science-card { background: var(--off-white); border-radius: var(--radius); padding: 48px 36px; text-align: center; border: 1px solid var(--border); transition: all 0.4s ease; }
.science-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; animation: pulse-glow 2s ease infinite; }
.science-icon { width: 72px; height: 72px; margin: 0 auto 24px; background: linear-gradient(135deg, var(--purple-soft), rgba(192,154,83,0.08)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 30px; border: 1px solid rgba(192,154,83,0.15); }
.science-card h3 { font-family: var(--font-head); font-size: 22px; color: var(--purple); margin-bottom: 12px; }
.science-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.6; font-weight: 300; }

/* ===== THE SYSTEMS ===== */
.systems { padding: var(--section-pad); background: var(--off-white); position: relative; overflow: hidden; }

/* Content column */
.systems-content-col { width: 100%; max-width: 1200px; margin: 0 auto; }
.systems-header { text-align: center; margin-bottom: 50px; }
.systems-header .section-subtitle { max-width: 560px; margin: 0 auto; }
.sys-title { color: var(--purple); transition: color 0.4s; }

/* Tabs */
.systems-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 48px; }
.sys-tab { padding: 14px 36px; border-radius: 100px; font-size: 14px; font-weight: 600; cursor: pointer; border: 2px solid var(--border); background: var(--white); color: var(--text-muted); transition: all 0.3s; }
.sys-tab.active { border-color: var(--purple); background: var(--purple); color: var(--white); }
.sys-tab:hover:not(.active) { border-color: var(--purple-light); color: var(--purple); }

/* Slim active state — green colors */
.systems[data-active="slim"] .sys-title { color: var(--green); }
.systems[data-active="slim"] .sys-tab.active { border-color: var(--green); background: var(--green); }
.systems[data-active="slim"] .sys-tab:hover:not(.active) { border-color: var(--green-light); color: var(--green); }

/* Panels */
.systems-panel { display: none; }
.systems-panel.active { display: block; }
.sys-list { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }

/* Cards — horizontal layout with badge + body */
.sys-card { background: var(--white); border-radius: var(--radius); padding: 36px; border: 1px solid var(--border); display: flex; gap: 24px; align-items: flex-start; transition: all 0.4s; }
.sys-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: transparent; }

/* Number Badge — clean circle */
.sys-badge { width: 52px; height: 52px; min-width: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-body); font-size: 20px; font-weight: 700; flex-shrink: 0; transition: all 0.4s; }
.sys-badge--glow { background: linear-gradient(135deg, var(--purple), var(--purple-light)); color: var(--white); box-shadow: 0 4px 16px rgba(62,32,94,0.2); }
.sys-badge--slim { background: linear-gradient(135deg, var(--green), var(--green-light)); color: var(--white); box-shadow: 0 4px 16px rgba(26,92,58,0.2); }

/* Card body */
.sys-card-body { flex: 1; min-width: 0; }
.sys-card h3 { font-family: var(--font-head); font-size: 22px; color: var(--purple); margin-bottom: 6px; }
.systems[data-active="slim"] .sys-card h3 { color: var(--green); }
.sys-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 18px; font-weight: 300; line-height: 1.5; }

/* Table */
.sys-table { width: 100%; border-collapse: collapse; }
.sys-table td { padding: 10px 0; font-size: 13px; color: var(--text-primary); border-bottom: 1px solid var(--border); }
.sys-table td:first-child { font-weight: 400; color: var(--text-secondary); }
.sys-table td:last-child { text-align: right; font-weight: 600; color: var(--purple); white-space: nowrap; }
.systems[data-active="slim"] .sys-table td:last-child { color: var(--green); }
.sys-table tr:last-child td { border-bottom: none; }


/* ===== LIFESTYLE BAND ===== */
.lifestyle-band { height: 650px; position: relative; overflow: hidden; }
.lifestyle-band img { width: 100%; height: 100%; object-fit: cover; transition: transform 8s ease; }
.lifestyle-band:hover img { transform: scale(1.05); }
.lifestyle-band-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to bottom, rgba(26,92,58,0.5), rgba(26,92,58,0.7)); display: flex; align-items: center; justify-content: center; text-align: center; }
.lifestyle-band-text { color: var(--white); max-width: 700px; padding: 40px; }
.lifestyle-band-text h2 { font-family: var(--font-head); font-size: 48px; margin-bottom: 16px; font-weight: 600; }
.lifestyle-band-text p { font-size: 18px; font-weight: 300; opacity: 0.9; }
.lifestyle-band--ingredients { height: 550px; }
.lifestyle-band--ingredients img { object-position: center center; }

/* ===== PRODUCTS ===== */
.products { padding: var(--section-pad); background: var(--bg); }
.products-header { text-align: center; margin-bottom: 80px; }
.products-header .section-subtitle { margin: 0 auto; }
.products-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.product-card { background: var(--white); border: 1px solid var(--border); border-radius: 24px; overflow: hidden; transition: all 0.5s ease; }
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.product-card--glow { border-top: 4px solid var(--purple); }
.product-card--slim { border-top: 4px solid var(--green); }
.product-img-area { height: 360px; display: flex; align-items: center; justify-content: center; position: relative; }
.product-card--glow .product-img-area { background: linear-gradient(145deg, #F5F0FA, #FAF8FF); }
.product-card--slim .product-img-area { background: linear-gradient(145deg, #F0FAF5, #F5FFF8); }
.product-img-placeholder { width: 200px; height: 260px; border: 2px dashed var(--border); border-radius: var(--radius); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; font-size: 12px; color: var(--text-muted); padding: 20px; background: rgba(255,255,255,0.8); gap: 8px; }
.product-img-placeholder .pack-label { font-weight: 700; color: var(--purple); font-size: 14px; }
.product-card--slim .product-img-placeholder .pack-label { color: var(--green); }
.product-img { width: 100%; height: 320px; object-fit: contain; padding: 10px; transition: transform 0.3s ease; }
.product-card:hover .product-img { transform: scale(1.03); }
.product-info { padding: 36px; }
.product-name { font-family: var(--font-head); font-size: 28px; color: var(--purple); margin-bottom: 8px; }
.product-card--slim .product-name { color: var(--green); }
.product-hero-dose { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.product-flavour { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; display: flex; align-items: center; gap: 6px; }
.pack-toggle { display: flex; background: var(--off-white); border-radius: 100px; padding: 4px; margin-bottom: 24px; border: 1px solid var(--border); }
.pack-btn { flex: 1; padding: 10px 0; text-align: center; border-radius: 100px; font-size: 13px; font-weight: 600; cursor: pointer; transition: all 0.3s; border: none; background: transparent; color: var(--text-muted); }
.pack-btn.active { color: var(--white); box-shadow: 0 2px 8px rgba(0,0,0,0.15); }
.product-card--glow .pack-btn.active { background: var(--purple); }
.product-card--slim .pack-btn.active { background: var(--green); }
.product-price { display: flex; align-items: baseline; gap: 8px; margin-bottom: 24px; }
.product-price .price { font-family: var(--font-body); font-size: 36px; font-weight: 700; letter-spacing: -0.5px; }
.product-card--glow .product-price .price { color: var(--purple); }
.product-card--slim .product-price .price { color: var(--green); }
.product-price .per { font-size: 14px; color: var(--text-muted); }
.btn-buy { width: 100%; text-align: center; }
.product-card--slim .btn-buy { background: var(--green); }
.product-card--slim .btn-buy:hover { background: var(--green-light); box-shadow: 0 8px 24px rgba(26,92,58,0.25); }

/* ===== INGREDIENTS ===== */
.ingredients { padding: var(--section-pad); background: var(--off-white); }
.ingredients-header { text-align: center; margin-bottom: 60px; }
.ingredients-header .section-subtitle { margin: 0 auto; }
.ing-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 60px; }
.ing-tab { padding: 12px 32px; border-radius: 100px; font-size: 14px; font-weight: 600; cursor: pointer; border: 2px solid var(--border); background: var(--white); color: var(--text-muted); transition: all 0.3s; }
.ing-tab.active { border-color: var(--purple); background: var(--purple); color: var(--white); }
.ing-tab[data-tab="slim"].active { border-color: var(--green); background: var(--green); }
.ing-panel { display: none; }
.ing-panel.active { display: block; }
.ing-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.ing-card { background: var(--white); border-radius: var(--radius); padding: 32px; border: 1px solid var(--border); transition: all 0.4s ease; }
.ing-card:hover { box-shadow: var(--shadow-sm); transform: translateY(-4px); }
.ing-card-icon { font-size: 28px; margin-bottom: 16px; }
.ing-card h4 { font-family: var(--font-head); font-size: 18px; color: var(--purple); margin-bottom: 4px; }
.ing-card .dose { font-size: 14px; font-weight: 600; color: var(--gold); margin-bottom: 12px; }
.ing-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.5; font-weight: 300; }
#panel-slim .ing-card h4 { color: var(--green); }

/* ===== PRICE COMPARISON (3-column) ===== */
.comparison { padding: var(--section-pad); background: var(--bg); }
.comparison-header { text-align: center; margin-bottom: 80px; }
.comparison-header .section-subtitle { margin: 0 auto; }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.comparison-card { background: var(--white); border-radius: 24px; overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: all 0.4s; }
.comparison-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.comparison-card-header { padding: 32px; text-align: center; }
.comparison-card--glow .comparison-card-header { background: var(--purple); color: var(--white); }
.comparison-card--slim .comparison-card-header { background: var(--green); color: var(--white); }
.comparison-card-header h3 { font-family: var(--font-head); font-size: 28px; margin-bottom: 4px; }
.comparison-card-header p { font-size: 14px; opacity: 0.8; }

/* 3-column table */
.comp-table--3col { width: 100%; border-collapse: collapse; }
.comp-table--3col th { padding: 14px 20px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); border-bottom: 2px solid var(--border); background: var(--off-white); }
.comp-table--3col th:first-child { text-align: left; }
.comp-table--3col th:nth-child(2) { text-align: right; }
.comp-table--3col th:last-child { text-align: center; }
.comp-table--3col td { padding: 16px 20px; font-size: 14px; border-bottom: 1px solid var(--border); }
.comp-table--3col td:first-child { color: var(--text-primary); }
.comp-table--3col td:nth-child(2) { text-align: right; font-weight: 600; color: var(--text-secondary); }
.comp-table--3col td.check { text-align: center; font-size: 20px; font-weight: 700; }
.comparison-card--glow .comp-table--3col td.check { color: var(--purple); }
.comparison-card--slim .comp-table--3col td.check { color: var(--green); }
.comp-table--3col tr.total td { font-size: 16px; font-weight: 700; color: var(--text-primary); background: var(--off-white); border-top: 2px solid var(--border); }
.comp-table--3col tr.nexxgene td { font-size: 17px; font-weight: 800; border-bottom: none; }
.comp-table--3col tr.nexxgene--glow td { color: var(--purple); background: rgba(62,32,94,0.04); }
.comp-table--3col tr.nexxgene--slim td { color: var(--green); background: rgba(26,92,58,0.04); }
.comp-savings { text-align: center; padding: 24px; font-size: 14px; color: var(--text-muted); font-weight: 500; }
.comp-savings strong { font-size: 18px; }
.comparison-card--glow .comp-savings strong { color: var(--purple); }
.comparison-card--slim .comp-savings strong { color: var(--green); }

/* ===== RESULTS TIMELINE ===== */
.results { padding: var(--section-pad); background: var(--off-white); position: relative; overflow: hidden; }
.results-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-size: cover; background-position: center; transition: opacity 0.8s ease-in-out; z-index: 0; }
.results-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(255, 255, 255, 0.85); z-index: 1; }
.results-header { text-align: center; margin-bottom: 40px; }
.results-header .section-subtitle { margin: 0 auto; }
.results-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 60px; }
.results-tab { padding: 12px 32px; border-radius: 100px; font-size: 14px; font-weight: 600; cursor: pointer; border: 2px solid var(--border); background: var(--white); color: var(--text-muted); transition: all 0.3s; }
.results-tab.active { border-color: var(--purple); background: var(--purple); color: var(--white); }
.results-tab[data-rtab="slim"].active { border-color: var(--green); background: var(--green); }
.results-panel { display: none; }
.results-panel.active { display: block; }
.timeline { display: grid; grid-template-columns: repeat(4,1fr); gap: 32px; position: relative; }
.timeline::before { content: ''; position: absolute; top: 48px; left: 10%; right: 10%; height: 2px; background: linear-gradient(to right, var(--purple), var(--gold)); opacity: 0.15; }
.results-panel[id="rpanel-slim"] .timeline::before { background: linear-gradient(to right, var(--green), var(--gold)); }
.timeline-item { text-align: center; position: relative; }
.timeline-number { width: 96px; height: 96px; margin: 0 auto 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-head); font-size: 32px; font-weight: 700; color: var(--purple); background: var(--white); border: 2px solid var(--border); box-shadow: var(--shadow-sm); position: relative; z-index: 2; transition: all 0.4s; }
.timeline-item:hover .timeline-number { transform: scale(1.08); box-shadow: var(--shadow-md); }
.results-panel[id="rpanel-slim"] .timeline-number { color: var(--green); }
.timeline-item h4 { font-family: var(--font-head); font-size: 20px; color: var(--purple); margin-bottom: 8px; }
.results-panel[id="rpanel-slim"] .timeline-item h4 { color: var(--green); }
.timeline-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.5; font-weight: 300; padding: 0 8px; }

/* ===== TRUST ===== */
.trust { padding: 100px 0; background: var(--bg); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.trust-grid { display: flex; justify-content: center; gap: 80px; flex-wrap: wrap; }
.trust-badge { text-align: center; transition: all 0.3s; }
.trust-badge:hover { transform: translateY(-4px); }
.trust-icon { width: 72px; height: 72px; margin: 0 auto 16px; border-radius: 50%; border: 2px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 28px; transition: all 0.3s; overflow: hidden; background: #fff; }
.trust-icon img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.trust-badge:hover .trust-icon { border-color: var(--gold); box-shadow: 0 0 20px rgba(192,154,83,0.15); }
.trust-badge h4 { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.trust-badge p { font-size: 12px; color: var(--text-muted); }

/* ===== HOW TO USE ===== */
.howto { padding: var(--section-pad); position: relative; overflow: hidden; }
.howto-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.howto-bg img { width: 100%; height: 100%; object-fit: cover; }
.howto-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to right, rgba(62,32,94,0.92), rgba(62,32,94,0.8)); }
.howto-content { position: relative; z-index: 2; color: var(--white); }
.howto .section-label { color: rgba(255,255,255,0.6); }
.howto .section-title { color: var(--white); }
.howto-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 40px; margin-top: 60px; }
.howto-step { background: rgba(255,255,255,0.08); border-radius: var(--radius); padding: 48px 32px; border: 1px solid rgba(255,255,255,0.1); text-align: center; transition: all 0.4s; backdrop-filter: blur(8px); }
.howto-step:hover { background: rgba(255,255,255,0.14); transform: translateY(-6px); border-color: rgba(255,255,255,0.2); }
.howto-step-num { font-family: var(--font-head); font-size: 48px; color: var(--gold); margin-bottom: 20px; }
.howto-step h4 { font-size: 18px; font-weight: 600; margin-bottom: 12px; }
.howto-step p { font-size: 15px; font-weight: 300; opacity: 0.85; line-height: 1.5; }

/* ===== SIGNUP ===== */
.signup { padding: var(--section-pad); background: var(--off-white); }
.signup-inner { max-width: 600px; margin: 0 auto; text-align: center; }
.signup .section-title { font-size: 40px; }
.signup-form { display: flex; flex-direction: column; gap: 16px; margin-top: 32px; width: 100%; max-width: 500px; margin-left: auto; margin-right: auto; }
.signup-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; width: 100%; }
.signup-form input { padding: 16px 24px; border-radius: 12px; border: 1px solid var(--border); font-size: 15px; font-family: var(--font-body); outline: none; transition: border 0.3s; background: var(--white); width: 100%; box-sizing: border-box; }
.signup-form input:focus { border-color: var(--purple); }
.signup-form button { padding: 16px 32px; border-radius: 12px; background: var(--purple); color: var(--white); border: none; font-size: 16px; font-weight: 600; cursor: pointer; transition: all 0.3s; width: 100%; box-sizing: border-box; }
.signup-form button:hover { background: var(--purple-light); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(62,32,94,0.15); }
.signup-disclaimer { font-size: 12px; color: var(--text-muted); margin-top: 16px; }

/* ===== FOOTER ===== */
.footer { padding: 80px 0 40px; background: #0A0A0A; color: var(--off-white); border-top: none; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px; margin-bottom: 60px; }
.footer-brand p { font-size: 14px; color: rgba(255, 255, 255, 0.6); line-height: 1.6; margin-top: 16px; }
.footer-brand .nav-logo { filter: brightness(0) invert(1) opacity(0.9); transition: opacity 0.3s; }
.footer-brand .nav-logo:hover { opacity: 1; }
.footer-col h4 { font-size: 13px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 20px; color: var(--white); opacity: 0.9; }
.footer-col a { display: block; font-size: 14px; color: rgba(255, 255, 255, 0.6); margin-bottom: 12px; transition: color 0.3s; text-decoration: none; }
.footer-col a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 32px; text-align: center; }
.footer-bottom p { font-size: 12px; color: rgba(255, 255, 255, 0.4); line-height: 1.8; }

/* ===== WHATSAPP ===== */
.whatsapp-btn { position: fixed; bottom: 28px; right: 28px; width: 60px; height: 60px; background: #25D366; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(37,211,102,0.3); z-index: 999; transition: all 0.3s; cursor: pointer; animation: float 3s ease-in-out infinite; }
.whatsapp-btn:hover { transform: scale(1.1); box-shadow: 0 6px 20px rgba(37,211,102,0.4); animation: none; }
.whatsapp-btn svg { width: 28px; height: 28px; fill: var(--white); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  :root { --section-pad: 50px 0; }
  .container { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .hero { min-height: 100svh; height: auto; padding: 100px 0 60px; }
  .hero-title { font-size: 36px; }
  .hero-subtitle { font-size: 16px; }
  .section-title { font-size: 28px; }
  .science-grid, .ing-grid, .sys-list { grid-template-columns: 1fr; }
  .products-grid, .comparison-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .signup-form { width: 100%; }
  .signup-form-grid { grid-template-columns: 1fr; }
  .lifestyle-band { height: 450px; background-attachment: scroll !important; }
  .hero-bg { background-attachment: scroll !important; }
  .howto-bg { background-attachment: scroll !important; }
  .lifestyle-band--ingredients { height: 400px; }
  .lifestyle-band-text h2 { font-size: 28px; }
  .hero-ctas { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .comparison-card { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .comp-table--3col { min-width: 100%; width: 100%; table-layout: fixed; }
  .comp-table--3col th, .comp-table--3col td { padding: 12px 4px; font-size: 11px; word-wrap: break-word; }
  .comp-table--3col th:nth-child(1), .comp-table--3col td:nth-child(1) { width: 45%; }
  .comp-table--3col th:nth-child(2), .comp-table--3col td:nth-child(2) { width: 30%; }
  .comp-table--3col th:nth-child(3), .comp-table--3col td:nth-child(3) { width: 25%; }
  .comp-table--3col tr.total td { font-size: 13px; }
  .comp-table--3col tr.nexxgene td { font-size: 14px; }
  .systems-layout { flex-direction: column; gap: 40px; }
  .systems-dna-col { width: 100%; position: relative; top: auto; display: flex; justify-content: center; }
  .systems-dna-col canvas { width: 200px; height: 350px; }
  .systems-tabs { flex-direction: column; align-items: stretch; }
  .sys-card { flex-direction: column; gap: 16px; padding: 24px; }
  .sys-badge { width: 44px; height: 44px; min-width: 44px; font-size: 18px; }
}