/* ===================================================
   VitaCore — Design System & Global Styles
   Version: 1.0.0 | 2026
   Aesthetic: Organic Luxury · Botanical Dark
   =================================================== */

/* ─── Google Fonts ─── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=Noto+Sans+KR:wght@300;400;500;700&family=DM+Mono:wght@300;400&display=swap');

/* ─── CSS Custom Properties ─── */
:root {
  /* Colors */
  --clr-bg:         #0a0f0d;
  --clr-surface:    #111a14;
  --clr-surface-2:  #172012;
  --clr-border:     #1e2e1f;
  --clr-border-2:   #2a3d2c;

  --clr-primary:    #4ade80;
  --clr-primary-dim:#2d7a4a;
  --clr-primary-glow: rgba(74, 222, 128, 0.15);
  --clr-accent:     #a3e635;
  --clr-gold:       #d4af6e;
  --clr-gold-dim:   rgba(212, 175, 110, 0.3);

  --clr-text:       #e8f0e9;
  --clr-text-2:     #9fb89f;
  --clr-text-3:     #5a7a5c;
  --clr-white:      #ffffff;

  /* Typography */
  --font-display:   'Cormorant Garamond', Georgia, serif;
  --font-body:      'Noto Sans KR', sans-serif;
  --font-mono:      'DM Mono', monospace;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 7rem;

  /* Border radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-glow: 0 0 40px rgba(74, 222, 128, 0.12);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lift: 0 8px 40px rgba(0, 0, 0, 0.6);

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 1280px;
  --nav-height: 72px;
}

/* ─── Reset & Base ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb { background: var(--clr-border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--clr-primary-dim); }

/* ─── Selection ─── */
::selection {
  background: var(--clr-primary-glow);
  color: var(--clr-primary);
}

/* ─── Grain overlay ─── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.5;
}

/* ─── Typography ─── */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.display-xl {
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 300;
  font-style: italic;
  letter-spacing: -0.03em;
}

.display-lg {
  font-size: clamp(2rem, 5vw, 4rem);
  font-style: italic;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  font-style: italic;
  color: var(--clr-text);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-primary);
}

/* ─── Layout ─── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-3xl) 0;
}

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(10, 15, 13, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--clr-bg);
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.nav__logo-text span {
  color: var(--clr-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--clr-text-2);
  transition: var(--transition);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--clr-primary);
  transition: var(--transition);
}

.nav__links a:hover {
  color: var(--clr-primary);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav__cart {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-2);
  transition: var(--transition);
}

.nav__cart:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}

.nav__cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  background: var(--clr-primary);
  border-radius: 50%;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--clr-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font-body);
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--clr-primary);
  color: var(--clr-bg);
}

.btn-primary:hover {
  background: var(--clr-accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(74, 222, 128, 0.3);
}

.btn-outline {
  border: 1px solid var(--clr-border-2);
  color: var(--clr-text-2);
}

.btn-outline:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--clr-primary);
  padding-left: 0;
}

.btn-ghost:hover {
  gap: var(--space-md);
}

/* ─── Hero ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 60% 50%, rgba(74, 222, 128, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 80% 20%, rgba(163, 230, 53, 0.04) 0%, transparent 60%);
}

.hero__grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74, 222, 128, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 222, 128, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 80%);
}

.hero__content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.hero__eyebrow-line {
  width: 40px;
  height: 1px;
  background: var(--clr-primary);
}

.hero__title {
  margin-bottom: var(--space-xl);
  color: var(--clr-white);
}

.hero__title em {
  color: var(--clr-primary);
  font-style: italic;
}

.hero__desc {
  font-size: 1.0625rem;
  color: var(--clr-text-2);
  max-width: 480px;
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--clr-border);
}

.hero__stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--clr-primary);
}

.hero__stat-label {
  font-size: 0.8rem;
  color: var(--clr-text-3);
  letter-spacing: 0.05em;
}

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

.hero__orb {
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%,
    rgba(74, 222, 128, 0.2) 0%,
    rgba(74, 222, 128, 0.05) 40%,
    transparent 70%
  );
  border: 1px solid rgba(74, 222, 128, 0.2);
  position: relative;
  animation: pulse-orb 4s ease-in-out infinite;
}

@keyframes pulse-orb {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.8; }
}

.hero__orb::before {
  content: '';
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%,
    rgba(74, 222, 128, 0.15) 0%,
    transparent 60%
  );
  border: 1px solid rgba(74, 222, 128, 0.1);
}

.hero__molecule {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.molecule-text {
  font-family: var(--font-display);
  font-size: 5rem;
  font-style: italic;
  color: rgba(74, 222, 128, 0.6);
  text-shadow: 0 0 40px rgba(74, 222, 128, 0.3);
}

.hero__float-card {
  position: absolute;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  backdrop-filter: blur(20px);
  animation: float 3s ease-in-out infinite;
}

.hero__float-card:nth-child(1) {
  top: 15%;
  left: -10%;
  animation-delay: 0s;
}

.hero__float-card:nth-child(2) {
  bottom: 20%;
  right: -10%;
  animation-delay: 1.5s;
}

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

.float-card__label {
  font-size: 0.7rem;
  color: var(--clr-text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.float-card__value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--clr-primary);
}

.float-card__sub {
  font-size: 0.75rem;
  color: var(--clr-text-2);
}

/* ─── Section Header ─── */
.section-header {
  margin-bottom: var(--space-2xl);
}

.section-header--center {
  text-align: center;
}

.section-header .section-label {
  display: block;
  margin-bottom: var(--space-md);
}

.section-header .section-title {
  display: block;
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--clr-text-2);
  max-width: 600px;
}

.section-header--center p {
  margin: 0 auto;
}

/* ─── Vitamins Section ─── */
.vitamins-section {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.vitamins-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.vitamin-tab {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--clr-border-2);
  color: var(--clr-text-3);
  transition: var(--transition);
  font-family: var(--font-body);
}

.vitamin-tab:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}

.vitamin-tab.active {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: var(--clr-bg);
}

.vitamins-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.vitamin-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.vitamin-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  opacity: 0;
  transition: var(--transition);
}

.vitamin-card:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.vitamin-card:hover::before {
  opacity: 1;
}

.vitamin-card__letter {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 300;
  font-style: italic;
  color: var(--clr-primary);
  opacity: 0.3;
  position: absolute;
  top: var(--space-md);
  right: var(--space-xl);
  line-height: 1;
}

.vitamin-card__badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.badge-fat { background: rgba(212, 175, 110, 0.15); color: var(--clr-gold); }
.badge-water { background: rgba(74, 222, 128, 0.1); color: var(--clr-primary); }

.vitamin-card__name {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
}

.vitamin-card__aka {
  font-size: 0.8rem;
  color: var(--clr-text-3);
  font-family: var(--font-mono);
  margin-bottom: var(--space-lg);
}

.vitamin-card__benefits {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--clr-text-2);
}

.benefit-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-primary);
  flex-shrink: 0;
}

.vitamin-card__footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--clr-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.vitamin-card__dose {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--clr-text-3);
}

/* ─── Products Section ─── */
.products-section {
  background: var(--clr-bg);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.product-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift), 0 0 40px rgba(74, 222, 128, 0.08);
  border-color: var(--clr-border-2);
}

.product-card__rank {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  z-index: 2;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.rank-gold { background: var(--clr-gold); color: var(--clr-bg); }
.rank-silver { background: #a0aec0; color: var(--clr-bg); }
.rank-bronze { background: #c88c50; color: var(--clr-bg); }
.rank-normal { background: var(--clr-border-2); color: var(--clr-text-2); }

.product-card__img {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, var(--clr-surface-2) 0%, var(--clr-surface) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  position: relative;
  overflow: hidden;
}

.product-card__img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 80%, rgba(74, 222, 128, 0.08) 0%, transparent 70%);
}

.product-card__body {
  padding: var(--space-lg);
}

.product-card__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--clr-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.product-card__name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.product-card__desc {
  font-size: 0.825rem;
  color: var(--clr-text-2);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.product-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.product-card__price {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--clr-primary);
}

.product-card__rating {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--clr-gold);
}

.product-card__add {
  width: 100%;
  padding: var(--space-md);
  background: var(--clr-bg);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-md);
  color: var(--clr-text-2);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
  font-family: var(--font-body);
}

.product-card__add:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: var(--clr-bg);
}

/* ─── Health Goals Section ─── */
.goals-section {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.goals-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.goal-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: var(--transition);
  cursor: pointer;
}

.goal-card:hover {
  border-color: var(--clr-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.goal-card__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-lg);
}

.goal-card__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--clr-white);
  margin-bottom: var(--space-md);
}

.goal-card__desc {
  font-size: 0.875rem;
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.goal-card__items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.goal-tag {
  padding: 3px 10px;
  background: var(--clr-primary-glow);
  border: 1px solid rgba(74, 222, 128, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--clr-primary);
}

/* ─── CTA / Newsletter ─── */
.newsletter-section {
  padding: var(--space-3xl) 0;
  background: var(--clr-bg);
  position: relative;
  overflow: hidden;
}

.newsletter-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.newsletter-inner {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.newsletter-inner .section-title {
  margin-bottom: var(--space-md);
}

.newsletter-inner p {
  color: var(--clr-text-2);
  margin-bottom: var(--space-xl);
}

.newsletter-form {
  display: flex;
  gap: var(--space-sm);
  max-width: 480px;
  margin: 0 auto;
}

.newsletter-input {
  flex: 1;
  padding: 0.75rem 1.25rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-full);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  outline: none;
  transition: var(--transition);
}

.newsletter-input:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.1);
}

.newsletter-input::placeholder {
  color: var(--clr-text-3);
}

/* ─── Footer ─── */
.footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: var(--space-2xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand p {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  line-height: 1.8;
  margin-top: var(--space-md);
  max-width: 260px;
}

.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--space-lg);
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__col ul a {
  font-size: 0.875rem;
  color: var(--clr-text-2);
  transition: var(--transition);
}

.footer__col ul a:hover {
  color: var(--clr-primary);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--clr-border);
  font-size: 0.8rem;
  color: var(--clr-text-3);
}

/* ─── Scroll reveal ─── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ─── Mobile Menu ─── */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  height: 1.5px;
  background: var(--clr-text-2);
  border-radius: 1px;
  transition: var(--transition);
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .goals-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 4rem;
    --space-2xl: 2.5rem;
  }

  .nav__links { display: none; }

  .mobile-menu-btn { display: flex; }

  .hero__content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__desc {
    max-width: 100%;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__stats {
    justify-content: center;
  }

  .hero__visual {
    display: none;
  }

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

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

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .container {
    padding: 0 var(--space-lg);
  }
}

@media (max-width: 480px) {
  .vitamins-grid {
    grid-template-columns: 1fr;
  }

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

/* ─── Loading animation ─── */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(90deg,
    var(--clr-surface) 25%,
    var(--clr-border) 50%,
    var(--clr-surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ─── Toast notification ─── */
.toast-container {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-left: 3px solid var(--clr-primary);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  font-size: 0.875rem;
  color: var(--clr-text);
  animation: toast-in 0.3s ease, toast-out 0.3s ease 2.7s forwards;
  max-width: 280px;
  backdrop-filter: blur(20px);
}

@keyframes toast-in {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);   opacity: 1; }
}

@keyframes toast-out {
  from { transform: translateX(0);   opacity: 1; }
  to   { transform: translateX(100%); opacity: 0; }
}