/* ============================================
   MASTICK — style.css
   Premium DTC filtered showerhead brand
   Mobile-first · Editorial design
   ============================================ */

/* --- 1. Design Tokens --- */
:root {
  --color-primary: #EAC63E;
  --color-dark: #16181A;
  --color-cream: #F5F2EA;
  --color-orange: #E8601C;
  --color-success: #2D8F3C;
  --color-white: #FFFFFF;
  --color-text: #16181A;
  --color-text-muted: #6B6B6B;
  --color-border: #E5E5E5;
  --color-bg: #F9F7F2;
  --color-bg-dark: #16181A;

  --font-heading: Georgia, 'Times New Roman', Times, serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --fs-xs: 0.6875rem;   /* 11px */
  --fs-sm: 0.8125rem;   /* 13px */
  --fs-base: 1rem;      /* 16px */
  --fs-md: 1.125rem;    /* 18px */
  --fs-lg: 1.5rem;      /* 24px */
  --fs-xl: 2rem;        /* 32px */
  --fs-2xl: 2.5rem;     /* 40px */
  --fs-3xl: 3rem;       /* 48px */
  --fs-4xl: 3.5rem;     /* 56px */

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

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

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);

  --header-height: 60px;
  --announce-height: 40px;
  --transition: 0.3s ease;
}

/* --- 2. Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }

/* --- 3. Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text);
}

.heading-display {
  font-size: var(--fs-2xl);
  font-weight: 900;
  letter-spacing: -0.02em;
}
.heading-display em,
.heading-display i {
  font-style: italic;
  font-weight: 400;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}
.section-label--light { color: var(--color-primary); }

.section-label__icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.text-muted { color: var(--color-text-muted); }
.text-white { color: var(--color-white); }
.text-primary { color: var(--color-primary); }

/* --- 4. Utility --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section-padding {
  padding: var(--spacing-2xl) 0;
}

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

/* --- 5. Announcement Bar --- */
.announce-bar {
  background: var(--color-dark);
  color: var(--color-white);
  text-align: center;
  padding: 10px var(--spacing-md);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.4;
}

/* --- 6. Header / Navigation --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header--scrolled { box-shadow: var(--shadow-sm); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

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

.header__logo img,
.header__logo svg {
  height: 28px;
  width: auto;
}

.header__nav { display: none; }

.header__nav-list {
  display: flex;
  gap: var(--spacing-lg);
}

.header__nav-link {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: opacity var(--transition);
  white-space: nowrap;
}
.header__nav-link:hover { opacity: 0.6; }
.header__nav-link--active { border-bottom: 2px solid var(--color-dark); }

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

.header__action-btn {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.header__action-btn svg { width: 20px; height: 20px; }

.header__cart-count {
  position: absolute;
  top: 4px; right: 2px;
  background: var(--color-primary);
  color: var(--color-dark);
  font-size: 10px;
  font-weight: 700;
  width: 16px; height: 16px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.header__cart-count--visible { display: flex; }

.hamburger {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.hamburger__line {
  width: 20px; height: 2px;
  background: var(--color-dark);
  transition: var(--transition);
}
.hamburger--open .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger--open .hamburger__line:nth-child(2) { opacity: 0; }
.hamburger--open .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: calc(var(--header-height) + var(--announce-height));
  left: 0; right: 0; bottom: 0;
  background: var(--color-white);
  z-index: 90;
  padding: var(--spacing-lg) var(--spacing-md);
  transform: translateX(-100%);
  transition: transform var(--transition);
  overflow-y: auto;
}
.mobile-menu--open { transform: translateX(0); }

.mobile-menu__link {
  display: block;
  padding: var(--spacing-sm) 0;
  font-size: var(--fs-md);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
}

/* --- 7. Hero --- */
.hero {
  background: var(--color-primary);
  overflow: hidden;
}

.hero__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.hero__content {
  margin-bottom: var(--spacing-lg);
}

.hero__title {
  font-size: var(--fs-2xl);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: var(--spacing-md);
}
.hero__title em {
  font-style: italic;
  font-weight: 400;
}

.hero__text {
  font-size: var(--fs-base);
  line-height: 1.5;
  max-width: 500px;
  margin-bottom: var(--spacing-md);
}

.hero__cta-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.hero__price {
  font-size: var(--fs-sm);
  color: var(--color-text);
}

.hero__image {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.hero__image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero__stats {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 2px solid var(--color-dark);
}

.hero__stat {
  flex: 1;
  text-align: center;
}
.hero__stat-number {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 4px;
}
.hero__stat-label {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* --- 8. Proof Section --- */
.proof {
  background: var(--color-bg);
}

.proof__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.proof__image-wrapper {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.proof__image {
  width: 100%;
  border-radius: var(--radius-md);
}

.proof__badges {
  display: flex;
  justify-content: space-around;
  margin-top: var(--spacing-sm);
}

.proof__badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.proof__badge--day1 { background: var(--color-dark); color: var(--color-white); }
.proof__badge--day30 { background: var(--color-orange); color: var(--color-white); }

.proof__content { max-width: 500px; }

.proof__title {
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-sm);
}
.proof__title em { font-style: italic; font-weight: 400; }

.proof__text {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.proof__link {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.proof__link:hover { opacity: 0.7; }

/* --- 9. Water Checker --- */
.water-checker {
  background: var(--color-bg-dark);
  color: var(--color-white);
}

.water-checker__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.water-checker__title {
  color: var(--color-white);
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-sm);
}
.water-checker__title em { font-style: italic; font-weight: 400; }

.water-checker__text {
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--spacing-lg);
  max-width: 500px;
}

.water-checker__form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.water-checker__label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.water-checker__select {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: var(--color-white);
  font-size: var(--fs-base);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%23EAC63E'%3E%3Cpath d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}
.water-checker__select option { color: var(--color-dark); background: var(--color-white); }

.water-checker__result {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  color: var(--color-dark);
}

.water-checker__result-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

.water-checker__result-value {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}
.water-checker__result-unit {
  font-size: var(--fs-lg);
  vertical-align: super;
}

.water-checker__gauge {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to right, #A8D5A2, #EAC63E 40%, #E8601C 70%, #C0392B);
  margin-bottom: 8px;
  position: relative;
}
.water-checker__gauge-marker {
  position: absolute;
  top: -4px;
  width: 3px;
  height: 16px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: left var(--transition);
}

.water-checker__gauge-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-xs);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.water-checker__result-desc {
  font-size: var(--fs-sm);
  margin-bottom: var(--spacing-md);
}
.water-checker__result-desc strong { font-weight: 800; }

.water-checker__source {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.5);
  margin-top: var(--spacing-sm);
}

/* --- 10. Product Features --- */
.features {
  background: var(--color-bg);
}

.features__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.features__grid {
  display: grid;
  gap: var(--spacing-lg);
}

.features__image {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.features__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.features__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  gap: var(--spacing-sm);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-dark);
}
.feature-item:last-child { border-bottom: none; }

.feature-item__icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-item__icon svg { width: 24px; height: 24px; }

.feature-item__title {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: 800;
  margin-bottom: 2px;
}

.feature-item__text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.features__cta {
  margin-top: var(--spacing-lg);
}

.features__price {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}
.features__price-old {
  text-decoration: line-through;
  opacity: 0.6;
}

/* --- 11. Mechanism Section --- */
.mechanism {
  background: var(--color-primary);
}

.mechanism__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.mechanism__title {
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-sm);
}
.mechanism__title em { font-style: italic; font-weight: 400; }

.mechanism__text {
  margin-bottom: var(--spacing-lg);
  max-width: 500px;
}

.mechanism__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
}

.mechanism__card {
  background: var(--color-white);
  border: 3px solid var(--color-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.mechanism__card-header,
.mechanism__card-footer {
  background: var(--color-dark);
  color: var(--color-primary);
  text-align: center;
  padding: 10px;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.mechanism__layer {
  padding: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-start;
}
.mechanism__layer + .mechanism__layer {
  border-top: 2px dashed var(--color-border);
}

.mechanism__layer-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--color-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mechanism__layer-title {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: var(--fs-base);
  margin-bottom: 2px;
}

.mechanism__layer-text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* --- 12. Range / Gamme --- */
.range {
  background: var(--color-bg);
}

.range__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.range__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--spacing-lg);
}

.range__link {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  font-size: var(--fs-sm);
  white-space: nowrap;
}

.range__grid {
  display: grid;
  gap: var(--spacing-md);
}

.range__featured {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  position: relative;
}
.range__featured img {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
}

.range__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.range-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  transition: opacity var(--transition);
}
.range-item:hover { opacity: 0.7; }
.range-item:last-child { border-bottom: none; }

.range-item__image {
  width: 56px; height: 56px;
  flex-shrink: 0;
  background: var(--color-cream);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.range-item__image img { width: 100%; height: 100%; object-fit: cover; }

.range-item__category {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.range-item__name {
  font-weight: 700;
  font-size: var(--fs-sm);
  line-height: 1.3;
}

.range-item__prices {
  margin-left: auto;
  text-align: right;
  white-space: nowrap;
}

.price-current {
  font-weight: 800;
  color: var(--color-text);
}
.price-old {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-decoration: line-through;
  margin-left: 4px;
}

/* --- 13. Lifestyle Gallery --- */
.lifestyle {
  background: var(--color-bg);
}

.lifestyle__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.lifestyle__title {
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-lg);
}
.lifestyle__title em { font-style: italic; font-weight: 400; }

.lifestyle__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.lifestyle__item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/5;
}
.lifestyle__item:first-child {
  grid-row: span 2;
  aspect-ratio: auto;
}

.lifestyle__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lifestyle__badge {
  position: absolute;
  bottom: var(--spacing-sm);
  left: var(--spacing-sm);
  background: var(--color-white);
  color: var(--color-dark);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 700;
}

/* --- 14. Guarantee Banner --- */
.guarantee {
  background: var(--color-dark);
  color: var(--color-white);
}

.guarantee__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-lg);
}

.guarantee__badge {
  width: 100px; height: 100px;
  border-radius: 50%;
  border: 3px solid var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.guarantee__badge-number {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 900;
  line-height: 1;
  color: var(--color-primary);
}
.guarantee__badge-label {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.guarantee__title {
  color: var(--color-white);
  font-size: var(--fs-xl);
}
.guarantee__title em { font-style: italic; font-weight: 400; }

.guarantee__text {
  color: rgba(255,255,255,0.7);
  max-width: 500px;
}

/* --- 15. FAQ Accordion --- */
.faq {
  background: var(--color-white);
}

.faq__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.faq__header {
  margin-bottom: var(--spacing-lg);
}

.faq__subtitle {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.faq__list {
  max-width: 700px;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--spacing-md) 0;
  font-weight: 700;
  font-size: var(--fs-base);
  text-align: left;
  gap: var(--spacing-sm);
}

.faq-item__icon {
  width: 28px; height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: var(--fs-md);
  line-height: 1;
}
.faq-item--open .faq-item__icon {
  transform: rotate(45deg);
  border-color: var(--color-dark);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item--open .faq-item__answer {
  max-height: 300px;
  padding-bottom: var(--spacing-md);
}

.faq-item__answer p {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

/* --- 16. Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer__grid {
  display: grid;
  gap: var(--spacing-lg);
}

.footer__brand-desc {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
  margin: var(--spacing-sm) 0;
  max-width: 280px;
}

.footer__contact {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.6);
}
.footer__contact a { text-decoration: underline; color: var(--color-white); }

.footer__col-title {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  color: var(--color-white);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer__link {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.footer__link:hover { color: var(--color-white); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer__payment { display: flex; gap: var(--spacing-xs); }
.footer__payment-icon {
  width: 40px; height: 26px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: var(--color-dark);
}

.footer__copy {
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.4);
  text-align: center;
  line-height: 1.5;
}

/* --- 17. Buttons / CTAs --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: all var(--transition);
  text-align: center;
  gap: 8px;
}

.btn--primary {
  background: var(--color-dark);
  color: var(--color-white);
}
.btn--primary:hover { background: #2a2d30; transform: translateY(-1px); }

.btn--white {
  background: var(--color-white);
  color: var(--color-dark);
}
.btn--white:hover { background: var(--color-cream); }

.btn--outline {
  background: transparent;
  border: 2px solid var(--color-dark);
  color: var(--color-dark);
}

.btn--full { width: 100%; }

.btn--lg { padding: 18px 40px; font-size: var(--fs-base); }

/* --- 18. Badges --- */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1.2;
}
.badge--orange { background: var(--color-orange); color: var(--color-white); }
.badge--green { background: var(--color-success); color: var(--color-white); }
.badge--primary { background: var(--color-primary); color: var(--color-dark); }
.badge--dark { background: var(--color-dark); color: var(--color-white); }
.badge--discount { background: var(--color-orange); color: var(--color-white); }

/* --- 19. Product Page --- */
.product-page {
  background: var(--color-white);
}

.product-page__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
}

/* Gallery */
.gallery {
  margin-bottom: var(--spacing-lg);
}

.gallery__main {
  position: relative;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 1;
}
.gallery__main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery__badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
}

.gallery__dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: var(--spacing-sm);
}
.gallery__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: background var(--transition);
}
.gallery__dot--active { background: var(--color-dark); }

.gallery__thumbs {
  display: none;
}

/* Product Info */
.product-info {
  margin-bottom: var(--spacing-lg);
}

.product-info__title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 900;
  margin-bottom: var(--spacing-xs);
}

.product-info__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.product-info__checks {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: var(--spacing-md);
}

.product-info__check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  font-weight: 500;
}
.product-info__check-icon {
  color: var(--color-success);
  font-size: var(--fs-md);
  flex-shrink: 0;
}

/* Offer Selector */
.offer-selector {
  margin-bottom: var(--spacing-md);
}

.offer-selector__label {
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
  position: relative;
}
.offer-selector__label::before,
.offer-selector__label::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 30%;
  height: 1px;
  background: var(--color-border);
}
.offer-selector__label::before { left: 0; }
.offer-selector__label::after { right: 0; }

.offer-option {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color var(--transition);
}
.offer-option:hover { border-color: var(--color-text-muted); }
.offer-option--selected {
  border-color: var(--color-dark);
  background: rgba(234,198,62,0.04);
}

.offer-option__radio {
  width: 20px; height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  flex-shrink: 0;
  margin-right: var(--spacing-sm);
  position: relative;
}
.offer-option--selected .offer-option__radio {
  border-color: var(--color-dark);
}
.offer-option--selected .offer-option__radio::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 10px; height: 10px;
  background: var(--color-dark);
  border-radius: 50%;
}

.offer-option__info { flex: 1; }

.offer-option__title {
  font-weight: 700;
  font-size: var(--fs-sm);
}

.offer-option__subtitle {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.offer-option__prices {
  text-align: right;
}

.offer-option__price {
  font-weight: 800;
  font-size: var(--fs-md);
  color: var(--color-text);
}

.offer-option__compare {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.offer-option__discount {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--color-orange);
}

.offer-option__badge {
  position: absolute;
  top: -10px;
  right: var(--spacing-sm);
}

.offer-option__extra {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px dashed var(--color-border);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* Add to cart */
.product-info__atc {
  margin-bottom: var(--spacing-sm);
}

.product-info__delivery {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}
.product-info__delivery-dot {
  width: 8px; height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  flex-shrink: 0;
}

.product-info__trial {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--color-cream);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
}
.product-info__trial-icon { font-size: var(--fs-lg); flex-shrink: 0; }
.product-info__trial-title { font-weight: 700; font-size: var(--fs-sm); }
.product-info__trial-text { font-size: var(--fs-xs); color: var(--color-text-muted); }

.product-info__payment {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

/* Accordion (product page) */
.accordion {
  border-top: 1px solid var(--color-border);
}

.accordion__item {
  border-bottom: 1px solid var(--color-border);
}

.accordion__trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--spacing-sm) 0;
  font-weight: 700;
  font-size: var(--fs-sm);
  text-align: left;
}

.accordion__icon {
  font-size: var(--fs-md);
  transition: transform var(--transition);
}
.accordion__item--open .accordion__icon {
  transform: rotate(45deg);
}

.accordion__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.accordion__item--open .accordion__body {
  max-height: 500px;
  padding-bottom: var(--spacing-sm);
}

.accordion__body p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Benefits section */
.benefits {
  padding: var(--spacing-2xl) 0;
  text-align: center;
  background: var(--color-white);
}

.benefits__title {
  font-size: var(--fs-lg);
  margin-bottom: var(--spacing-lg);
}
.benefits__title em { font-style: italic; font-weight: 400; }

.benefits__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  max-width: 700px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.benefit-card {
  text-align: center;
}
.benefit-card__icon {
  width: 48px; height: 48px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-xs);
}
.benefit-card__title {
  font-weight: 800;
  font-size: var(--fs-sm);
  margin-bottom: 4px;
}
.benefit-card__text {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* Comparison table */
.comparison {
  background: var(--color-primary);
  padding: var(--spacing-2xl) 0;
}

.comparison__inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.comparison__title {
  text-align: center;
  font-size: var(--fs-lg);
  margin-bottom: var(--spacing-lg);
}
.comparison__title em { font-style: italic; font-weight: 400; }

.comparison__table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.comparison__table th {
  padding: 12px 16px;
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}
.comparison__table th:first-child { width: 40%; text-align: left; }
.comparison__table th.comparison__col-them { background: var(--color-cream); }
.comparison__table th.comparison__col-us {
  background: var(--color-dark);
  color: var(--color-white);
}

.comparison__table td {
  padding: 14px 16px;
  font-size: var(--fs-sm);
  text-align: center;
  border-top: 1px solid var(--color-border);
}
.comparison__table td:first-child { text-align: left; font-weight: 600; }
.comparison__table td.comparison__col-them { color: var(--color-text-muted); }

.comparison__check { color: var(--color-success); }
.comparison__cross { color: var(--color-text-muted); opacity: 0.4; }

/* Recommended products */
.recommended {
  padding: var(--spacing-2xl) 0;
  background: var(--color-white);
}

.recommended__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.recommended__title {
  text-align: center;
  font-size: var(--fs-lg);
  margin-bottom: var(--spacing-lg);
}

.recommended__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.product-card {
  text-decoration: none;
  display: block;
}
.product-card:hover { opacity: 0.85; }

.product-card__image {
  position: relative;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 1;
  margin-bottom: var(--spacing-xs);
}
.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card__badge {
  position: absolute;
  top: 8px; left: 8px;
}

.product-card__name {
  font-weight: 700;
  font-size: var(--fs-sm);
  line-height: 1.3;
  margin-bottom: 4px;
}

.product-card__prices {
  font-size: var(--fs-sm);
}

/* --- 20. Cart Drawer --- */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}
.cart-overlay--open { opacity: 1; visibility: visible; }

.cart-drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 100%;
  max-width: 420px;
  background: var(--color-white);
  z-index: 210;
  transform: translateX(100%);
  transition: transform var(--transition);
  display: flex;
  flex-direction: column;
}
.cart-drawer--open { transform: translateX(0); }

.cart-drawer__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}
.cart-drawer__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-md);
}
.cart-drawer__close {
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.cart-drawer__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
}

.cart-drawer__empty {
  text-align: center;
  padding: var(--spacing-2xl) 0;
  color: var(--color-text-muted);
}

.cart-item {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.cart-item__image {
  width: 64px; height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--color-cream);
}
.cart-item__image img { width: 100%; height: 100%; object-fit: cover; }

.cart-item__info { flex: 1; }
.cart-item__name { font-weight: 700; font-size: var(--fs-sm); }
.cart-item__variant { font-size: var(--fs-xs); color: var(--color-text-muted); }
.cart-item__price { font-weight: 700; font-size: var(--fs-sm); margin-top: 4px; }

.cart-item__remove {
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  text-decoration: underline;
  align-self: flex-end;
}

.cart-drawer__footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md);
}

.cart-drawer__subtotal {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  margin-bottom: 4px;
}

.cart-drawer__taxes {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.cart-drawer__secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
}

/* --- 21. Sticky Mobile CTA --- */
.sticky-cta {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 10px var(--spacing-md);
  z-index: 80;
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
}
.sticky-cta--visible { display: flex; }

.sticky-cta__info { flex: 1; min-width: 0; }
.sticky-cta__name {
  font-size: var(--fs-xs);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sticky-cta__prices { font-size: var(--fs-xs); }

.sticky-cta .btn { padding: 12px 20px; font-size: var(--fs-xs); white-space: nowrap; }

/* --- 22. Page templates (info pages) --- */
.page {
  background: var(--color-white);
  padding: var(--spacing-2xl) 0;
  min-height: 60vh;
}
.page__inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}
.page__title {
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-lg);
}
.page__content p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
  color: var(--color-text-muted);
}
.page__content h3 {
  font-size: var(--fs-md);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}
.page__content a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page__content ul {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}
.page__content ul li {
  list-style: disc;
  margin-bottom: 6px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- 23. Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- 24. Responsive — Tablet (768px+) --- */
@media (min-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .heading-display { font-size: var(--fs-3xl); }

  .hero__title { font-size: var(--fs-3xl); }

  .proof__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
  }
  .proof__image-wrapper { margin-bottom: 0; }

  .water-checker__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
  }

  .features__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
  }

  .mechanism__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
  }

  .range__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
  }

  .guarantee__inner { flex-direction: row; text-align: left; }

  .faq__inner {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
  }

  .footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }

  .recommended__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Product page side-by-side */
  .product-page__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
  }
}

/* --- 25. Responsive — Desktop (1024px+) --- */
@media (min-width: 1024px) {
  :root {
    --header-height: 72px;
  }

  .heading-display { font-size: var(--fs-4xl); }

  .hamburger { display: none; }
  .header__nav { display: block; }

  .hero__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    padding: var(--spacing-3xl) var(--spacing-md);
  }
  .hero__title { font-size: var(--fs-3xl); }
  .hero__image { margin-bottom: 0; }
  .hero__stats { margin-top: var(--spacing-xl); }

  .proof__title { font-size: var(--fs-2xl); }
  .water-checker__title { font-size: var(--fs-2xl); }
  .mechanism__title { font-size: var(--fs-2xl); }
  .lifestyle__title { font-size: var(--fs-2xl); }
  .guarantee__title { font-size: var(--fs-2xl); }

  .lifestyle__grid {
    grid-template-columns: 2fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
  }

  .sticky-cta { display: none !important; }

  /* Product page gallery with thumbs */
  .gallery {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--spacing-sm);
  }

  .gallery__thumbs {
    display: flex;
    flex-direction: column;
    gap: 8px;
    order: -1;
  }

  .gallery__thumb {
    width: 80px; height: 80px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    background: var(--color-cream);
    transition: border-color var(--transition);
  }
  .gallery__thumb--active { border-color: var(--color-dark); }
  .gallery__thumb img { width: 100%; height: 100%; object-fit: cover; }

  .gallery__dots { display: none; }
}

/* --- Body lock for drawers --- */
body.no-scroll { overflow: hidden; }