/* =============================================================================
   Kasturi Craft Foods — styles.css
   =============================================================================

   Sections:
    1. CSS Custom Properties (Design Tokens)
    2. Reset & Base
    3. Typography
    4. Layout Utilities
    5. Navigation
    6. Hero
    7. Product Cards
    8. Filter Tabs
    9. Product Detail
   10. About Page
   11. Contact Form
   12. Footer
   13. Utilities (reveal, tags, buttons)
   14. Media Queries
   ============================================================================= */

/* =============================================================================
   1. CSS Custom Properties (Design Tokens)
   ============================================================================= */
:root {
  /* Colours */
  --color-bg:        #FDFAF4;
  --color-surface:   #F5EFE0;
  --color-primary:   #C68B1A;
  --color-dark:      #2C1F0E;
  --color-text:      #4A3728;
  --color-muted:     #8A7060;
  --color-green:     #3D6B4F;
  --color-white:     #FFFFFF;

  /* Derived */
  --color-primary-hover: #A87215;
  --color-green-hover:   #2F5540;
  --color-border:        #D9CEB8;

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  /* Font sizes */
  --text-xs:   0.75rem;
  --text-sm:   0.85rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  2rem;
  --text-4xl:  2.5rem;
  --text-5xl:  3rem;

  /* Spacing */
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-7:   1.75rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;
  --space-16:  4rem;
  --space-20:  5rem;
  --space-24:  6rem;

  /* Border radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-full: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(44, 31, 14, 0.08);
  --shadow-md: 0 4px 12px rgba(44, 31, 14, 0.12);
  --shadow-lg: 0 8px 24px rgba(44, 31, 14, 0.16);

  /* Transitions */
  --transition-fast:   0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow:   0.5s ease;

  /* Layout */
  --container-max: 1200px;
  --nav-height:    72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* =============================================================================
   3. Typography
   ============================================================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-dark);
  line-height: 1.25;
  font-weight: 700;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  color: var(--color-text);
  line-height: 1.75;
}

.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-heading {
  font-family: var(--font-heading);
  color: var(--color-dark);
  margin-bottom: var(--space-4);
}

.section-subtext {
  color: var(--color-muted);
  max-width: 60ch;
}

/* =============================================================================
   4. Layout Utilities
   ============================================================================= */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-20);
}

.section--alt {
  background-color: var(--color-surface);
}

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

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

/* =============================================================================
   5. Navigation
   ============================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-normal);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-logo span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.02em;
  padding-bottom: var(--space-1);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
  cursor: pointer;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Mobile nav open state */
.nav-open .nav-hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-open .nav-hamburger span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-open .nav-hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile dropdown */
.nav-mobile-dropdown {
  display: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: var(--space-4) var(--space-6);
  flex-direction: column;
  gap: var(--space-3);
}

.nav-open .nav-mobile-dropdown {
  display: flex;
}

.nav-mobile-dropdown a {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.nav-mobile-dropdown a:last-child {
  border-bottom: none;
}

.nav-mobile-dropdown a:hover,
.nav-mobile-dropdown a.active {
  color: var(--color-primary);
}

/* =============================================================================
   6. Hero
   ============================================================================= */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background-color: var(--color-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(198, 139, 26, 0.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 80% 80%, rgba(61, 107, 79, 0.12) 0%, transparent 70%),
    linear-gradient(160deg, #2C1F0E 0%, #1a1108 60%, #2C1F0E 100%);
}

/* Decorative grain texture */
.hero-bg::after {
  content: '';
  position: absolute;
  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='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  padding-inline: var(--space-6);
}

.hero-eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  color: var(--color-white);
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero h1 em {
  font-style: italic;
  color: var(--color-primary);
}

.hero-tagline {
  font-size: var(--text-xl);
  color: rgba(253, 250, 244, 0.75);
  margin-bottom: var(--space-10);
  max-width: 55ch;
  margin-inline: auto;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* Page-level hero (About, Contact, Products) */
.page-hero {
  background-color: var(--color-dark);
  padding-block: var(--space-16);
  text-align: center;
}

.page-hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.page-hero p {
  color: rgba(253, 250, 244, 0.7);
  font-size: var(--text-lg);
}

/* =============================================================================
   7. Product Cards
   ============================================================================= */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-8);
}

.product-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  position: relative;
}

.product-card__image img,
.product-card__image .placeholder-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card__body {
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-card__category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background-color: var(--color-green);
  color: var(--color-white);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
  align-self: flex-start;
}

.product-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.product-card__tagline {
  color: var(--color-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
  flex: 1;
}

/* =============================================================================
   8. Filter Tabs
   ============================================================================= */
.filter-tabs {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.filter-tab {
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background-color: transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.filter-tab:hover {
  background-color: rgba(198, 139, 26, 0.08);
}

.filter-tab[data-active="true"] {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* =============================================================================
   9. Product Detail
   ============================================================================= */
.product-detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.product-detail__image {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--color-surface);
}

.product-detail__image img,
.product-detail__image .placeholder-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-detail__info {
  /* Scrollable right column */
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-5);
}

.breadcrumb a {
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

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

.breadcrumb span {
  color: var(--color-muted);
}

.product-detail__name {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-4xl));
  margin-bottom: var(--space-4);
}

.product-detail__description {
  color: var(--color-text);
  margin-bottom: var(--space-6);
  font-size: var(--text-lg);
  line-height: 1.8;
}

.product-detail__divider {
  height: 1px;
  background-color: var(--color-border);
  margin-block: var(--space-6);
}

.detail-section-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

/* Benefits list */
.benefits-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.benefits-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--color-text);
}

.benefits-list li::before {
  content: '';
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  margin-top: 8px;
}

/* Weight pills */
.weight-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.weight-pill {
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-1) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  background-color: transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.weight-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Lab reports */
.lab-reports-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.lab-report-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-green);
  padding: var(--space-2) var(--space-4);
  border: 2px solid var(--color-green);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  align-self: flex-start;
}

.lab-report-link:hover {
  background-color: var(--color-green);
  color: var(--color-white);
}

.lab-report-link svg {
  flex-shrink: 0;
}

.lab-report-coming-soon {
  color: var(--color-muted);
  font-style: italic;
  font-size: var(--text-sm);
}

/* =============================================================================
   10. About Page
   ============================================================================= */
/* Farm-to-shelf timeline */
.timeline {
  display: flex;
  gap: 0;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(28px + 0%);
  right: calc(28px);
  height: 2px;
  background: linear-gradient(to right, var(--color-primary), var(--color-green));
}

.timeline-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: var(--space-4);
  position: relative;
}

.timeline-step__number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  z-index: 1;
  position: relative;
  box-shadow: 0 0 0 6px var(--color-bg);
}

.timeline-step:first-child .timeline-step__number {
  background-color: var(--color-primary);
}

.timeline-step h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.timeline-step p {
  font-size: var(--text-sm);
  color: var(--color-muted);
  max-width: 18ch;
  margin-inline: auto;
}

/* Quality badge */
.quality-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background-color: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-6);
  margin-top: var(--space-8);
}

.quality-badge__text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-dark);
}

/* Decorative colour block */
.deco-block {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.deco-block--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #E8A030 100%);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.deco-block--green {
  background: linear-gradient(135deg, var(--color-green) 0%, #5A9270 100%);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.deco-block__inner {
  text-align: center;
  color: var(--color-white);
  padding: var(--space-8);
}

.deco-block__inner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-lg);
  font-style: italic;
}

.deco-block__inner h3 {
  color: var(--color-white);
  font-size: var(--text-3xl);
  margin-bottom: var(--space-3);
}

/* =============================================================================
   11. Contact Form
   ============================================================================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(198, 139, 26, 0.15);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #C0392B;
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-error {
  font-size: var(--text-xs);
  color: #C0392B;
  font-weight: 500;
  display: none;
}

.form-error.visible {
  display: block;
}

.success-banner {
  display: none;
  background-color: var(--color-green);
  color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  font-weight: 600;
  text-align: center;
  margin-top: var(--space-4);
}

.success-banner.visible {
  display: block;
}

.contact-details {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-8);
}

.contact-detail-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-detail-item:last-child {
  margin-bottom: 0;
}

.contact-detail-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-primary);
}

.contact-detail-item h4 {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-bottom: var(--space-1);
}

.contact-detail-item p,
.contact-detail-item a {
  color: var(--color-text);
  font-weight: 500;
}

.contact-detail-item a:hover {
  color: var(--color-primary);
}

/* =============================================================================
   12. Footer
   ============================================================================= */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding-top: var(--space-16);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-brand-name span {
  color: var(--color-primary);
}

.footer-blurb {
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.footer-social a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.footer-col-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-white);
  margin-bottom: var(--space-5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-contact-item:last-child {
  margin-bottom: 0;
}

.footer-contact-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-primary);
}

.footer-contact-item span {
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: 1.6;
}

.footer-contact-item a {
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer-contact-item a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-block: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copyright {
  font-size: var(--text-xs);
  color: var(--color-muted);
}

/* =============================================================================
   13. Utilities (reveal, tags, buttons)
   ============================================================================= */

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* Stagger delay for children */
.reveal-group > *:nth-child(1) { transition-delay: 0s; }
.reveal-group > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-group > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-group > *:nth-child(4) { transition-delay: 0.3s; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-7);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 2px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,0.6);
}

.btn-ghost:hover {
  background-color: rgba(255,255,255,0.1);
  border-color: var(--color-white);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-green {
  background-color: var(--color-green);
  color: var(--color-white);
  border: 2px solid var(--color-green);
}

.btn-green:hover {
  background-color: var(--color-green-hover);
  border-color: var(--color-green-hover);
}

.btn-lg {
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-8);
}

/* Value cards */
.value-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-6);
  text-align: center;
}

.value-card__icon {
  width: 56px;
  height: 56px;
  background-color: rgba(198, 139, 26, 0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}

.value-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.value-card p {
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: 1.7;
}

/* Placeholder image */
.placeholder-img {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-border) 100%);
}

.placeholder-img svg {
  opacity: 0.3;
  color: var(--color-muted);
}

/* Page header / breadcrumb area */
.page-header {
  padding-block: var(--space-10) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
}

.page-header h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-2);
}

/* Featured products section */
.featured-section {
  background-color: var(--color-surface);
}

/* About strip (home page) */
.about-strip {
  background-color: var(--color-bg);
}

/* Related products */
.related-section {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-12);
  margin-top: var(--space-12);
}

/* WhatsApp button color override */
.btn-whatsapp {
  background-color: #25D366;
  color: var(--color-white);
  border-color: #25D366;
}

.btn-whatsapp:hover {
  background-color: #1DAE54;
  border-color: #1DAE54;
}

/* Composition block */
.composition-text {
  background-color: var(--color-surface);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-3) var(--space-5);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text);
  font-size: var(--text-sm);
}

/* Not-found state */
.not-found-state {
  text-align: center;
  padding-block: var(--space-24);
}

.not-found-state h2 {
  margin-bottom: var(--space-4);
}

.not-found-state p {
  color: var(--color-muted);
  margin-bottom: var(--space-8);
}

/* =============================================================================
   14. Media Queries
   ============================================================================= */

/* Tablet — ≤ 1024px */
@media (max-width: 1024px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-detail-layout {
    gap: var(--space-10);
  }
}

/* Tablet — ≤ 768px */
@media (max-width: 768px) {
  :root {
    --space-20: 4rem;
  }

  /* Nav */
  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  /* Layouts */
  .grid-2 {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .grid-3 {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }

  /* Product detail */
  .product-detail-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .product-detail__image {
    position: static;
  }

  /* Contact */
  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }

  /* Timeline */
  .timeline {
    flex-direction: column;
    gap: var(--space-8);
  }

  .timeline::before {
    display: none;
  }

  .timeline-step {
    flex-direction: row;
    text-align: left;
    align-items: flex-start;
    gap: var(--space-5);
  }

  .timeline-step__number {
    flex-shrink: 0;
    margin-bottom: 0;
  }

  .timeline-step p {
    max-width: none;
    margin-inline: 0;
  }
}

/* Mobile — ≤ 480px */
@media (max-width: 480px) {
  :root {
    --space-16: 3rem;
    --space-20: 3rem;
  }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-lg); }

  .container {
    padding-inline: var(--space-4);
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }

  .hero-tagline {
    font-size: var(--text-base);
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  .filter-tabs {
    gap: var(--space-2);
  }

  .btn-lg {
    width: 100%;
    justify-content: center;
  }
}

/* Screen-reader only utility */
.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;
}