/* ============================================
   Resonate Life Water v2 — Design System
   Probiotic Structured Water for Human Health
   A Resonate Life Labs Product
   
   Palette: Forest Green + Teal + Cosmic Nebula
   Zero external dependencies
   ============================================ */

/* ============================
   CSS CUSTOM PROPERTIES
   ============================ */
:root {
  /* Primary — Forest Green */
  --clr-primary-50:  #edf5f0;
  --clr-primary-100: #d4e8da;
  --clr-primary-200: #a8d1b6;
  --clr-primary-300: #7cba91;
  --clr-primary-400: #4f9e6a;
  --clr-primary-500: #2D5A3D;
  --clr-primary-600: #244a32;
  --clr-primary-700: #1b3926;
  --clr-primary-800: #12271a;
  --clr-primary-900: #0a160f;

  /* Accent — Teal */
  --clr-teal-50:  #effaf8;
  --clr-teal-100: #d0f0ea;
  --clr-teal-200: #a1e1d5;
  --clr-teal-300: #72d2c0;
  --clr-teal-400: #4A9B8E;
  --clr-teal-500: #3a7d72;
  --clr-teal-600: #2a5e55;
  --clr-teal-700: #1b3f39;

  /* Cosmic Nebula Palette */
  --clr-violet-50:  #f3edff;
  --clr-violet-100: #e0d0ff;
  --clr-violet-200: #c4a3ff;
  --clr-violet-300: #a78bfa;
  --clr-violet-400: #8b5cf6;
  --clr-violet-500: #7c3aed;
  --clr-violet-600: #6d28d9;
  --clr-violet-700: #5b21b6;
  --clr-violet-800: #4c1d95;
  --clr-violet-900: #2e1065;

  --clr-deepblue:       #1e3a5f;
  --clr-deepblue-dark:  #0f1d30;
  --clr-cosmic-teal:    #2dd4bf;
  --clr-nebula-start:   #1e1b4b;
  --clr-nebula-mid:     #312e81;
  --clr-nebula-end:     #0f766e;

  /* Neutrals (warm) */
  --clr-neutral-50:  #fafaf9;
  --clr-neutral-100: #f5f5f4;
  --clr-neutral-200: #e7e5e4;
  --clr-neutral-300: #d6d3d1;
  --clr-neutral-400: #a8a29e;
  --clr-neutral-800: #292524;
  --clr-neutral-900: #1c1917;

  /* Semantic */
  --clr-success: #10b981;
  --clr-warning: #f59e0b;
  --clr-error:   #ef4444;

  /* Brand tokens — Dark Cosmic Theme */
  --clr-primary:      var(--clr-cosmic-teal);
  --clr-primary-dark: var(--clr-primary-700);
  --clr-accent:       var(--clr-violet-400);
  --clr-bg:           #080b14;
  --clr-surface:      #0e1220;
  --clr-surface-alt:  #111827;
  --clr-text:         #e8eaf0;
  --clr-text-muted:   #8b95b0;
  --clr-border:       rgba(45, 212, 191, 0.12);

  /* Layout */
  --container: 1140px;
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-xl:  28px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 18px 50px rgba(0,0,0,0.10);
  --shadow-glow-violet: 0 4px 20px rgba(124,58,237,0.15);
  --shadow-glow-teal:   0 4px 20px rgba(74,155,142,0.15);

  /* Spacing */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  24px;
  --sp-6:  32px;
  --sp-7:  48px;
  --sp-8:  64px;
  --sp-9:  96px;

  /* Typography — system only */
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 150ms;
  --dur-base: 300ms;
  --dur-slow: 500ms;
}


/* ============================
   RESET & BASE
   ============================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  height: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  min-height: 100%;
  overflow-x: hidden;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--clr-text);
  background:
    radial-gradient(ellipse 1200px 700px at 10% 0%, rgba(45,212,191,0.08), transparent 55%),
    radial-gradient(ellipse 1000px 700px at 90% 30%, rgba(124,58,237,0.07), transparent 55%),
    radial-gradient(ellipse 800px 600px at 50% 100%, rgba(30,27,75,0.5), transparent 70%),
    var(--clr-bg);
  /* Fade-in on load */
  opacity: 0;
  transition: opacity 250ms ease;
}

body.is-loaded { opacity: 1; }

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(74,155,142,0.5);
  outline-offset: 2px;
}

button { font: inherit; }


/* ============================
   UTILITY
   ============================ */
.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0,0,0,0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 9999;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--clr-text);
  font-weight: 700;
  border: 2px solid var(--clr-primary);
  box-shadow: var(--shadow-md);
}
.skip-link:focus { left: 16px; }


/* ============================
   TOP BANNER
   ============================ */
.top-banner {
  background: transparent;
  border-bottom: none;
  color: rgba(45,212,191,0.8);
  text-align: center;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}


/* ============================
   HEADER
   ============================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) ease, box-shadow var(--dur-base) ease, padding var(--dur-base) ease;
}

.site-header.is-scrolled {
  background: rgba(8, 11, 20, 0.97) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
  border-bottom: 1px solid rgba(45,212,191,0.12) !important;
}



.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: 14px 0;
  transition: padding var(--dur-base) ease;
}

.site-header.is-scrolled .header__inner {
  padding: 8px 0;
}

/* Nav links white when header is transparent (over hero) */
.site-header:not(.is-scrolled) .nav__link,
.site-header:not(.is-scrolled) .header-actions__link {
  color: rgba(255,255,255,0.9);
}
.site-header:not(.is-scrolled) .nav__link:hover,
.site-header:not(.is-scrolled) .header-actions__link:hover {
  color: #fff;
}
.site-header:not(.is-scrolled) .brand__name {
  color: #fff;
}
.site-header:not(.is-scrolled) .brand__tagline {
  color: rgba(255,255,255,0.7);
}

/* Brand / Logo */
.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  flex-shrink: 0;
}

.brand__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary-500), var(--clr-teal-400));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 900;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(45,90,61,0.2);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--clr-primary-500);
  letter-spacing: -0.01em;
}

.brand__tagline {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Nav */
.nav {
  display: none;
  gap: var(--sp-4);
  align-items: center;
}

.nav__link {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--clr-text-muted);
  transition: color var(--dur-fast) ease;
  text-decoration: none;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--clr-primary-500);
  text-decoration: none;
}

.nav__link.is-active {
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--clr-teal-400);
}

/* Mobile menu */
.nav.is-open {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  position: absolute;
  top: 100%;
  left: 16px;
  right: 16px;
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  background: rgba(8,11,20,0.97);
  border: 1px solid rgba(45,212,191,0.15);
  box-shadow: var(--shadow-lg);
  animation: slideDown 200ms var(--ease-out) forwards;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Menu button */
.menu-btn {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  background: #fff;
  cursor: pointer;
}

.menu-btn__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--clr-primary-500);
  border-radius: 2px;
  transition: transform var(--dur-fast) ease, opacity var(--dur-fast) ease;
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.header-actions__link {
  display: none;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--clr-text-muted);
}

.header-actions__link:hover {
  color: var(--clr-primary-500);
  text-decoration: none;
}

/* Cart icon */
.cart-icon a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--clr-border);
  background: #fff;
}

.cart-icon__svg { color: var(--clr-primary-500); }

.cart-count {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--radius-pill);
  background: var(--clr-violet-500);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}


/* ============================
   BUTTONS
   ============================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--clr-border);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  background: transparent;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-fast) ease, box-shadow var(--dur-base) ease, background var(--dur-base) ease;
}

.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px) scale(0.98); }

/* Ripple */
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(255,255,255,0.3);
  opacity: 0;
  transform: scale(0);
  transition: transform 400ms ease, opacity 400ms ease;
  pointer-events: none;
}
.btn:active::after { transform: scale(2.5); opacity: 1; }

.btn--primary {
  background: linear-gradient(135deg, var(--clr-violet-600), var(--clr-cosmic-teal));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(124,58,237,0.3);
}

.btn--primary:hover {
  box-shadow: 0 6px 24px rgba(124,58,237,0.4);
  filter: brightness(1.06);
}

.btn--cosmic {
  background: linear-gradient(135deg, var(--clr-violet-600), var(--clr-violet-500), var(--clr-teal-400));
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-glow-violet);
}

.btn--cosmic:hover {
  box-shadow: 0 6px 28px rgba(124,58,237,0.25);
}

.btn--secondary {
  background: rgba(45,90,61,0.06);
  border-color: rgba(45,90,61,0.18);
  color: var(--clr-primary-500);
}

.btn--ghost {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-color: rgba(255,255,255,0.35);
  backdrop-filter: blur(4px);
}

.btn--ghost:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(255,255,255,0.6);
}

/* Ghost on light background */
.section--light .btn--ghost,
.products-header ~ * .btn--ghost {
  background: rgba(45,90,61,0.06);
  color: var(--clr-primary-500);
  border-color: rgba(45,90,61,0.18);
}
.section--light .btn--ghost:hover {
  background: var(--clr-primary-50);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}


/* ============================
   MAIN LAYOUT
   ============================ */
.site-main {
  padding-top: 0;
}


/* ============================
   HERO
   ============================ */
.hero {
  position: relative;
  min-height: 100vh;
  margin-top: -80px;
  padding-top: 80px;
  display: flex;
  align-items: center;
  overflow: hidden;
  /* Cosmic nebula gradient background — no external images */
  background:
    radial-gradient(ellipse 800px 600px at 20% 30%, rgba(124,58,237,0.25), transparent 60%),
    radial-gradient(ellipse 600px 500px at 75% 50%, rgba(45,212,191,0.2), transparent 55%),
    radial-gradient(ellipse 500px 400px at 50% 85%, rgba(30,58,95,0.15), transparent 50%),
    radial-gradient(ellipse 900px 700px at 60% 20%, rgba(91,33,182,0.12), transparent 65%),
    linear-gradient(160deg, #0a160f 0%, #1e1b4b 35%, #0f766e 70%, #1b3926 100%);
  color: #fff;
}

/* Animated star particles */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 30% 65%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 55% 15%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 70% 80%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1.5px 1.5px at 85% 35%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 45% 50%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 15% 85%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 92% 60%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 60% 40%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 25% 45%, rgba(255,255,255,0.45), transparent);
  animation: twinkle 6s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

@keyframes twinkle {
  0%   { opacity: 0.4; }
  50%  { opacity: 0.8; }
  100% { opacity: 0.5; }
}

/* Soft light overlay */
.hero::after {
  content: "";
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(ellipse at 25% 40%, rgba(124,58,237,0.12), transparent 50%),
    radial-gradient(ellipse at 75% 60%, rgba(45,212,191,0.1), transparent 50%);
  animation: heroGlow 12s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

@keyframes heroGlow {
  from { transform: translate(-2%, -1%) rotate(-1deg); }
  to   { transform: translate(2%, 1%) rotate(1deg); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-7);
  align-items: center;
  padding: var(--sp-8) 0;
}

.hero__content {
  max-width: 640px;
}

.hero__eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.9);
  font-weight: 800;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
  backdrop-filter: blur(4px);
}

.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin-bottom: var(--sp-5);
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--clr-cosmic-teal), var(--clr-violet-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 500;
  line-height: 1.6;
  color: rgba(255,255,255,0.88);
  max-width: 55ch;
  margin-bottom: var(--sp-6);
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.hero__cta .btn--ghost {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.25);
  color: #fff;
  backdrop-filter: blur(4px);
}
.hero__cta .btn--ghost:hover {
  background: rgba(255,255,255,0.18);
}

/* Hero bottle */
.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__bottle-img {
  width: 100%;
  max-width: 380px;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  filter: drop-shadow(0 0 40px rgba(74,155,142,0.4)) drop-shadow(0 0 80px rgba(124,58,237,0.2));
  animation: floatBottle 6s ease-in-out infinite;
}

@keyframes floatBottle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}


/* ============================
   SECTIONS — SHARED
   ============================ */
.section {
  padding: var(--sp-8) 0;
}

.section--alt {
  background:
    radial-gradient(ellipse 800px 400px at 0% 50%, rgba(45,212,191,0.05), transparent 60%),
    #0c0f1e;
  border-top: 1px solid rgba(45,212,191,0.08);
  border-bottom: 1px solid rgba(45,212,191,0.08);
  color: #e8eaf0;
}

.section--alt .btn--ghost,
.section--alt .btn--secondary {
  background: rgba(45,212,191,0.08);
  color: var(--clr-cosmic-teal);
  border-color: rgba(45,212,191,0.2);
  backdrop-filter: none;
}
.section--alt .btn--ghost:hover,
.section--alt .btn--secondary:hover {
  background: rgba(45,212,191,0.14);
}

.section--cosmic {
  background:
    radial-gradient(ellipse 900px 500px at 15% 20%, rgba(124,58,237,0.08), transparent 55%),
    radial-gradient(ellipse 700px 400px at 85% 70%, rgba(45,212,191,0.06), transparent 50%),
    #080b14;
  color: #e8eaf0;
}

.section--dark {
  background: linear-gradient(160deg, #060d18, #1e1b4b 50%, #0a2a28 100%);
  color: #fff;
}

.section__header {
  text-align: center;
  margin-bottom: var(--sp-7);
  max-width: 720px;
  margin-inline: auto;
}

.section__eyebrow {
  display: inline-block;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(74,155,142,0.1));
  border: 1px solid rgba(124,58,237,0.15);
  color: var(--clr-violet-700);
  font-weight: 800;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}

.section--dark .section__eyebrow {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
  color: var(--clr-cosmic-teal);
}

.section__title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

.section__subtitle {
  margin-top: var(--sp-4);
  color: var(--clr-text-muted);
  font-size: 1.05rem;
  line-height: 1.65;
  max-width: 65ch;
  margin-inline: auto;
}

.section--dark .section__subtitle {
  color: rgba(255,255,255,0.75);
}

section[id] {
  scroll-margin-top: 96px;
}


/* ============================
   SCROLL REVEAL
   ============================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  will-change: opacity, transform;
}

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

/* Stagger children */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out);
}

[data-reveal-stagger].is-visible > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(2) { transition-delay: 80ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(6) { transition-delay: 400ms; opacity: 1; transform: none; }

.no-js [data-reveal],
.no-js [data-reveal-stagger] > * {
  opacity: 1;
  transform: none;
}


/* ============================
   ABOUT / SPLIT SECTION
   ============================ */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-7);
  align-items: center;
}

.split__content { }

.split__title {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-4);
  color: #e8eaf0;
}

.split__text {
  color: rgba(210,220,240,0.85);
  line-height: 1.7;
  margin-bottom: var(--sp-5);
}

.check-list {
  list-style: none;
  display: grid;
  gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}

.check-list li {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-start;
  line-height: 1.5;
}

.check-list li::before {
  content: "✓";
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(74,155,142,0.12);
  color: var(--clr-teal-400);
  font-weight: 800;
  font-size: 0.8rem;
  display: grid;
  place-items: center;
}

/* Visual block */
.split__visual {
  border-radius: var(--radius-xl);
  background: transparent;
  display: flex;
  align-items: center;
  overflow: hidden;
}


/* ============================
   FEATURE CARDS
   ============================ */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
}

.feature {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(45,212,191,0.1);
  background: rgba(14,18,32,0.7);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) ease;
}

.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: var(--sp-4);
}

.feature__icon--green  { background: rgba(45,90,61,0.1); }
.feature__icon--teal   { background: rgba(74,155,142,0.1); }
.feature__icon--violet { background: rgba(124,58,237,0.08); }
.feature__icon--blue   { background: rgba(30,58,95,0.08); }

.feature__title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: var(--sp-2);
  color: #e8eaf0;
}

.feature__text {
  color: rgba(210,220,240,0.85);
  line-height: 1.6;
}


/* ============================
   BOTTLE VISUALIZATION (CSS-only)
   ============================ */
.bottle-viz {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-6);
}

.bottle-viz__scene {
  position: relative;
  width: 140px;
  height: 320px;
}

/* Cap */
.bottle-viz__cap {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 38px;
  height: 16px;
  background: linear-gradient(180deg, var(--clr-deepblue), var(--clr-nebula-end));
  border-radius: 5px 5px 2px 2px;
  z-index: 4;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

/* Neck */
.bottle-viz__neck {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 36px;
  background: linear-gradient(180deg, rgba(255,255,255,0.85), rgba(240,249,255,0.7));
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 3px 3px 0 0;
  z-index: 2;
}

/* Shoulder — curved transition from neck to body */
.bottle-viz__shoulder {
  position: absolute;
  top: 48px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 24px;
  background: linear-gradient(180deg, rgba(240,249,255,0.7), rgba(255,255,255,0.5));
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  border: 1px solid rgba(0,0,0,0.05);
  border-bottom: none;
  z-index: 2;
}

/* Body */
.bottle-viz__body {
  position: absolute;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 240px;
  border-radius: 4px 4px 14px 14px;
  overflow: hidden;
  background: linear-gradient(
    135deg,
    rgba(255,255,255,0.92) 0%,
    rgba(240,249,255,0.75) 25%,
    rgba(255,255,255,0.55) 50%,
    rgba(240,249,255,0.75) 75%,
    rgba(255,255,255,0.92) 100%
  );
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow:
    inset 0 0 30px rgba(255,255,255,0.5),
    0 8px 32px rgba(0,0,0,0.1),
    0 2px 8px rgba(0,0,0,0.06);
  z-index: 1;
}

/* Liquid */
.bottle-viz__liquid {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 78%;
  background: linear-gradient(
    180deg,
    rgba(45,212,191,0.1) 0%,
    rgba(74,155,142,0.2) 50%,
    rgba(45,90,61,0.15) 100%
  );
  z-index: 0;
}

/* Cosmic Nebula Sleeve */
.bottle-viz__sleeve {
  position: absolute;
  top: 12%;
  left: 0;
  right: 0;
  bottom: 8%;
  background:
    radial-gradient(ellipse 70px 50px at 25% 25%, rgba(167,139,250,0.65), transparent 60%),
    radial-gradient(ellipse 60px 45px at 75% 55%, rgba(45,212,191,0.55), transparent 55%),
    radial-gradient(ellipse 80px 60px at 45% 80%, rgba(30,58,95,0.5), transparent 55%),
    radial-gradient(ellipse 40px 30px at 60% 30%, rgba(255,255,255,0.15), transparent 50%),
    linear-gradient(180deg,
      var(--clr-nebula-start) 0%,
      var(--clr-nebula-mid) 35%,
      var(--clr-violet-700) 55%,
      var(--clr-nebula-end) 100%
    );
  opacity: 0.9;
  z-index: 2;
  /* Small stars on sleeve */
  background-size: 100% 100%;
}

.bottle-viz__sleeve::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 15% 20%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 40% 60%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 70% 30%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 55% 80%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 85% 70%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1px 1px at 30% 90%, rgba(255,255,255,0.35), transparent);
}

/* Window cutout on sleeve */
.bottle-viz__window {
  position: absolute;
  left: 50%;
  top: 42%;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  z-index: 3;
  backdrop-filter: blur(1px);
}

/* Glass shine reflection */
.bottle-viz__shine {
  position: absolute;
  top: 0;
  left: 10px;
  width: 14px;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(255,255,255,0.55),
    rgba(255,255,255,0.1) 40%,
    rgba(255,255,255,0.35) 70%,
    rgba(255,255,255,0.1)
  );
  z-index: 5;
  border-radius: 8px;
  pointer-events: none;
}

/* Second subtle shine */
.bottle-viz__shine2 {
  position: absolute;
  top: 0;
  right: 16px;
  width: 6px;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(255,255,255,0.2),
    rgba(255,255,255,0.05) 50%,
    rgba(255,255,255,0.15)
  );
  z-index: 5;
  border-radius: 4px;
  pointer-events: none;
}

.bottle-viz__label {
  text-align: center;
  margin-top: var(--sp-4);
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  line-height: 1.4;
}

/* Hero bottle — on dark background */
.hero .bottle-viz__label {
  color: rgba(255,255,255,0.7);
}


/* ============================
   PRODUCTS
   ============================ */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
  align-items: stretch;
}

.product-card {
  border-radius: var(--radius-xl);
  border: 1px solid rgba(45,212,191,0.12);
  background: rgba(14,18,32,0.85);
  backdrop-filter: blur(12px);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) ease;
}

.product-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-120%);
  transition: transform 600ms ease;
  pointer-events: none;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-card:hover::before {
  transform: translateX(120%);
}

/* Cosmic product card enhancements */
.product-card--cosmic {
  border-color: rgba(124,58,237,0.18);
  background:
    radial-gradient(ellipse 250px 180px at 85% 0%, rgba(124,58,237,0.10), transparent 60%),
    radial-gradient(ellipse 250px 180px at 15% 100%, rgba(45,212,191,0.08), transparent 60%),
    rgba(14,18,32,0.85);
}

.product-card--cosmic:hover {
  border-color: rgba(124,58,237,0.2);
  box-shadow: var(--shadow-glow-violet);
}

/* Featured product */
.product-card--featured {
  border-color: rgba(245,158,11,0.2);
  box-shadow: 0 12px 40px rgba(124,58,237,0.1);
}

/* Badge row — sits above image */
.product-card__badge-row {
  display: flex;
  margin-bottom: var(--sp-3);
}



.product-badge {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.product-badge--protocol {
  background: linear-gradient(135deg, rgba(124,58,237,0.12), rgba(45,212,191,0.12));
  border: 1px solid rgba(124,58,237,0.2);
  color: var(--clr-violet-700);
}

.product-badge--best {
  background: rgba(245,158,11,0.15);
  border: 1px solid rgba(245,158,11,0.25);
  color: #92400e;
}

.product-card__media {
  margin-bottom: var(--sp-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--clr-surface);
}

.product-card__img {
  width: 100%;
  height: 280px;
  object-fit: contain;
  object-position: center center;
  display: block;
  margin: 0 auto;
  background: #000;
  padding: 12px;
  transition: transform 0.4s ease;
}

/* Remove featured right-align override — center all */
.product-card--featured .product-card__img {
  object-position: center center;
}

.product-card:hover .product-card__img {
  transform: scale(1.03);
}

.product-card__title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: var(--sp-2);
}

.product-card__detail {
  font-weight: 700;
  color: var(--clr-text-muted);
  margin-bottom: var(--sp-3);
}

.product-card__desc {
  color: var(--clr-text-muted);
  line-height: 1.65;
  margin-bottom: var(--sp-5);
  font-size: 0.95rem;
}

/* Product specs list */
.product-specs {
  list-style: none;
  display: grid;
  gap: 8px;
  margin-bottom: var(--sp-5);
  flex: 1;
  align-content: start;
}

.product-specs li {
  padding: 10px 14px 10px 38px;
  position: relative;
  border-radius: var(--radius-md);
  background: rgba(124,58,237,0.07);
  border: 1px solid rgba(124,58,237,0.12);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--clr-text);
}

.product-specs li::before {
  content: "✦";
  position: absolute;
  left: 14px;
  top: 10px;
  color: var(--clr-violet-500);
  font-size: 0.85rem;
}

/* Pricing block */
.pricing {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(45,212,191,0.15);
  background:
    radial-gradient(ellipse 400px 180px at 25% 0%, rgba(45,212,191,0.10), transparent 55%),
    radial-gradient(ellipse 400px 200px at 75% 100%, rgba(124,58,237,0.10), transparent 55%),
    rgba(10,14,26,0.8);
  padding: var(--sp-5);
  margin-bottom: var(--sp-5);
}

.pricing__label {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  background: rgba(245,158,11,0.15);
  border: 1px solid rgba(245,158,11,0.25);
  color: #f59e0b;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

.pricing__amount {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--clr-primary-500);
  letter-spacing: -0.02em;
}

.pricing__note {
  margin-top: var(--sp-1);
  color: var(--clr-teal-500);
  font-weight: 700;
  font-size: 0.85rem;
}

/* Storage note */
.product-storage {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  background: rgba(45,212,191,0.04);
  border: 1px solid rgba(45,212,191,0.1);
  font-size: 0.88rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
  margin-bottom: var(--sp-4);
}

.product-storage strong {
  color: var(--clr-text);
}

/* Shopify placeholder button */
.shopify-buy-button {
  margin-top: auto;
}

/* Labs badge */
.labs-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, rgba(30,58,95,0.06), rgba(124,58,237,0.05));
  border: 1px solid rgba(30,58,95,0.1);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--clr-deepblue);
  letter-spacing: 0.03em;
  margin-top: var(--sp-4);
}

.guarantee {
  text-align: center;
  margin-top: var(--sp-6);
  font-weight: 800;
  color: var(--clr-primary-500);
  font-size: 1.05rem;
}


/* ============================
   PROTOCOL — TIMELINE
   ============================ */
.protocol-intro {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--sp-7);
}

.protocol-intro__text {
  color: var(--clr-text-muted);
  line-height: 1.7;
  font-size: 1.05rem;
}

.protocol-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

/* Vertical connecting line */
.protocol-timeline::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(
    180deg,
    #94a3b8,
    var(--clr-violet-400),
    var(--clr-cosmic-teal),
    var(--clr-teal-400)
  );
  border-radius: 3px;
  opacity: 0.25;
}

.protocol-phase {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: var(--sp-5);
  padding: var(--sp-6);
  position: relative;
  border-radius: var(--radius-lg);
  background: #080b14 !important;
  border: 1px solid rgba(45,212,191,0.22) !important;
  color: #e8eaf0 !important;
}

.protocol-phase + .protocol-phase {
  margin-top: var(--sp-3);
}

.protocol-phase__title {
  color: var(--clr-text);
}

.protocol-phase__desc {
  color: rgba(220,225,240,0.85) !important;
}

.protocol-phase__details li {
  color: rgba(220,225,240,0.85);
}

/* Phase number */
.protocol-phase__num {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 1.2rem;
  color: #fff;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

.protocol-phase--silver .protocol-phase__num {
  background: linear-gradient(135deg, #94a3b8, #64748b);
  box-shadow: 0 4px 16px rgba(100,116,139,0.25);
}
.protocol-phase--loading .protocol-phase__num {
  background: linear-gradient(135deg, var(--clr-violet-500), var(--clr-violet-700));
  box-shadow: 0 4px 16px rgba(124,58,237,0.25);
}
.protocol-phase--building .protocol-phase__num {
  background: linear-gradient(135deg, var(--clr-cosmic-teal), var(--clr-teal-500));
  box-shadow: 0 4px 16px rgba(45,212,191,0.25);
}
.protocol-phase--maintenance .protocol-phase__num {
  background: linear-gradient(135deg, var(--clr-teal-400), var(--clr-primary-500));
  box-shadow: 0 4px 16px rgba(74,155,142,0.25);
}

.protocol-phase__body { min-width: 0; }

.protocol-phase__tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

.protocol-phase--silver .protocol-phase__tag {
  background: rgba(100,116,139,0.12);
  border: 1px solid rgba(100,116,139,0.25);
  color: #94a3b8;
}
.protocol-phase--loading .protocol-phase__tag {
  background: rgba(124,58,237,0.12);
  border: 1px solid rgba(124,58,237,0.25);
  color: var(--clr-violet-300);
}
.protocol-phase--building .protocol-phase__tag {
  background: rgba(45,212,191,0.10);
  border: 1px solid rgba(45,212,191,0.22);
  color: var(--clr-cosmic-teal);
}
.protocol-phase--maintenance .protocol-phase__tag {
  background: rgba(74,155,142,0.10);
  border: 1px solid rgba(74,155,142,0.22);
  color: var(--clr-cosmic-teal);
}

.protocol-phase__title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: var(--sp-2);
  color: #e8eaf0;
}

.protocol-phase__desc {
  color: rgba(210,220,240,0.9);
  line-height: 1.65;
  margin-bottom: var(--sp-4);
}

.protocol-phase__details {
  list-style: none;
  border-radius: var(--radius-md);
  padding: var(--sp-4);
}

.protocol-phase--silver .protocol-phase__details  { background: #0f1422; border: 1px solid rgba(100,116,139,0.25); }
.protocol-phase--loading .protocol-phase__details  { background: #0f1422; border: 1px solid rgba(124,58,237,0.25); }
.protocol-phase--building .protocol-phase__details { background: #0f1422; border: 1px solid rgba(45,212,191,0.22); }
.protocol-phase--maintenance .protocol-phase__details { background: #0f1422; border: 1px solid rgba(74,155,142,0.22); }

.protocol-phase__details li {
  padding: 5px 0;
  font-size: 0.93rem;
  line-height: 1.55;
}

.protocol-phase__details li strong {
  color: var(--clr-text);
}

/* Supply guide callout */
.protocol-supply {
  margin-top: var(--sp-7);
  padding: var(--sp-5) var(--sp-6);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(45,212,191,0.12));
  border: 1px solid rgba(124,58,237,0.3);
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
}

.protocol-supply__title {
  font-weight: 800;
  font-size: 1rem;
  color: var(--clr-violet-700);
  margin-bottom: var(--sp-2);
}

.protocol-supply__text {
  color: var(--clr-text-muted);
  line-height: 1.65;
}

.protocol-cta {
  text-align: center;
  margin-top: var(--sp-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  justify-content: center;
}

/* Important note callout */
.callout {
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--clr-teal-400);
  background: rgba(74,155,142,0.05);
  margin-top: var(--sp-5);
}

.callout--violet {
  border-left-color: var(--clr-violet-500);
  background: rgba(124,58,237,0.04);
}

.callout__title {
  font-weight: 800;
  margin-bottom: var(--sp-2);
}

.callout__text {
  color: var(--clr-text-muted);
  line-height: 1.6;
}


/* ============================
   CONTACT
   ============================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-7);
  align-items: start;
}

.contact-info { }

.contact-details {
  display: grid;
  gap: var(--sp-5);
  margin-top: var(--sp-5);
}

.contact-details dt {
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.contact-details dd {
  margin-top: var(--sp-1);
  line-height: 1.6;
}

.contact-details a {
  color: var(--clr-primary-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Form */
.form {
  border-radius: var(--radius-xl);
  border: 1px solid var(--clr-border);
  background: rgba(255,255,255,0.9);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
}

.field {
  display: grid;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}

.field__label {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--clr-text-muted);
}

.field__input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(45,212,191,0.15);
  background: rgba(255,255,255,0.05);
  color: var(--clr-text);
  font: inherit;
  transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}

.field__input:focus {
  border-color: var(--clr-teal-400);
  box-shadow: 0 0 0 3px rgba(74,155,142,0.15);
  outline: none;
}

.field__input--area {
  resize: vertical;
  min-height: 100px;
}

.form__note {
  margin-top: var(--sp-2);
  color: var(--clr-text-muted);
  font-size: 0.82rem;
}


/* ============================
   FOOTER
   ============================ */
.site-footer {
  border-top: 1px solid rgba(45,212,191,0.1);
  padding: var(--sp-7) 0 var(--sp-6);
  background: rgba(6,9,18,0.98);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
}

.footer__brand { }

.footer__brand-name {
  font-weight: 800;
  color: var(--clr-primary-500);
  margin-bottom: var(--sp-1);
}

.footer__brand-sub {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.footer-nav__link {
  color: var(--clr-text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  transition: color var(--dur-fast) ease;
}

.footer-nav__link:hover {
  color: var(--clr-primary-500);
  text-decoration: none;
}

/* Newsletter */
.footer-signup {
  display: flex;
  gap: var(--sp-2);
  max-width: 380px;
}

.footer-signup__input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(45,212,191,0.2);
  background: rgba(255,255,255,0.05);
  color: var(--clr-text);
  font: inherit;
  font-size: 0.9rem;
}

.footer__bottom {
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--clr-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-3);
  font-size: 0.82rem;
  color: var(--clr-text-muted);
}


/* ============================
   SCROLL-TO-TOP
   ============================ */
.scroll-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--clr-border);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--clr-primary-500);
  display: grid;
  place-items: center;
  z-index: 50;
  transition: transform var(--dur-fast) ease, opacity var(--dur-fast) ease;
}

.scroll-top:hover {
  transform: translateY(-2px);
}


/* ============================
   404 PAGE
   ============================ */
.error-page {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--sp-8) var(--sp-5);
}

.error-page__code {
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--clr-violet-500), var(--clr-cosmic-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--sp-4);
}

.error-page__title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: var(--sp-3);
}

.error-page__text {
  color: var(--clr-text-muted);
  max-width: 45ch;
  margin-inline: auto;
  margin-bottom: var(--sp-6);
}


/* ============================
   RESPONSIVE — 640px+
   ============================ */
@media (min-width: 640px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer__inner {
    grid-template-columns: 1fr auto;
    align-items: start;
  }
}


/* ============================
   RESPONSIVE — 768px+
   ============================ */
@media (min-width: 768px) {
  .menu-btn { display: none; }

  .nav {
    display: flex;
    gap: var(--sp-5);
  }

  .nav.is-open {
    /* Reset mobile styles */
    position: static;
    flex-direction: row;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: transparent;
    animation: none;
  }

  .header-actions__link { display: inline-flex; }

  .hero__inner {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .hero__visual {
    display: flex;
  }

  .split {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
  }

  .protocol-timeline {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
    max-width: 800px;
  }

  .protocol-timeline::before { display: none; }

  .protocol-phase {
    grid-template-columns: 1fr;
    padding: var(--sp-5);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(124,58,237,0.06);
    background: rgba(255,255,255,0.65);
    backdrop-filter: blur(4px);
  }

  .protocol-phase + .protocol-phase { border-top: none; }

  .protocol-phase__num {
    margin-bottom: var(--sp-3);
  }

  .footer__inner {
    grid-template-columns: auto 1fr auto;
    gap: var(--sp-7);
    align-items: center;
  }

  .footer-nav {
    justify-content: center;
  }
}


/* ============================
   RESPONSIVE — 1024px+
   ============================ */
@media (min-width: 1024px) {
  .features {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero {
    min-height: 94vh;
  }

  .hero__content {
    max-width: 560px;
  }
}


/* ============================
   PRINT
   ============================ */
@media print {
  .site-header,
  .scroll-top,
  .top-banner,
  .hero::before,
  .hero::after { display: none !important; }

  body { background: #fff !important; color: #000 !important; }

  .site-main { padding-top: 0; }

  .hero {
    min-height: auto;
    background: #f5f5f5 !important;
    color: #000;
    padding: 2rem 0;
  }
}