/* ===================================================
   CARTEUM — Research Peptide Company
   Custom Pharmaceutical / Biotech Palette
   Updated March 2026
   =================================================== */

/* --- FONTS --- */
@import url('https://api.fontshare.com/v2/css?f[]=general-sans@300,400,500,600,700&f[]=cabinet-grotesk@500,700,800&display=swap');

:root {
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
}

/* --- TYPE SCALE --- */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
}

/* --- SPACING --- */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* --- RADIUS / TRANSITIONS --- */
:root {
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- CONTENT WIDTHS --- */
:root {
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* ===================================================
   LIGHT MODE (Default) — Clinical White + Teal
   =================================================== */
:root, [data-theme="light"] {
  --color-bg:               #f8f9fa;
  --color-surface:          #ffffff;
  --color-surface-2:        #f1f3f5;
  --color-surface-offset:   #e9ecef;
  --color-surface-offset-2: #dee2e6;
  --color-surface-dynamic:  #ced4da;
  --color-divider:          #dee2e6;
  --color-border:           #ced4da;

  --color-text:             #1a2332;
  --color-text-muted:       #5a6577;
  --color-text-faint:       #8b95a5;
  --color-text-inverse:     #f8f9fa;

  --color-primary:          #0a7e8c;
  --color-primary-hover:    #086b77;
  --color-primary-active:   #065862;
  --color-primary-highlight: #e0f4f4;

  --color-success:          #2d8a4e;
  --color-success-hover:    #1e7a3e;
  --color-warning:          #d4820c;
  --color-error:            #c53030;

  --shadow-sm: 0 1px 2px rgba(26, 35, 50, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 35, 50, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 35, 50, 0.12);
}

/* ===================================================
   DARK MODE — Deep Navy + Lighter Teal
   =================================================== */
[data-theme="dark"] {
  --color-bg:               #0d1117;
  --color-surface:          #161b22;
  --color-surface-2:        #1c2128;
  --color-surface-offset:   #21262d;
  --color-surface-offset-2: #282e36;
  --color-surface-dynamic:  #30363d;
  --color-divider:          #21262d;
  --color-border:           #30363d;

  --color-text:             #c9d1d9;
  --color-text-muted:       #8b949e;
  --color-text-faint:       #484f58;
  --color-text-inverse:     #0d1117;

  --color-primary:          #3dbcc9;
  --color-primary-hover:    #56d4e0;
  --color-primary-active:   #2aa3b0;
  --color-primary-highlight: #1a3038;

  --color-success:          #56d364;
  --color-success-hover:    #3fb950;
  --color-warning:          #e3b341;
  --color-error:            #f85149;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:               #0d1117;
    --color-surface:          #161b22;
    --color-surface-2:        #1c2128;
    --color-surface-offset:   #21262d;
    --color-surface-offset-2: #282e36;
    --color-surface-dynamic:  #30363d;
    --color-divider:          #21262d;
    --color-border:           #30363d;
    --color-text:             #c9d1d9;
    --color-text-muted:       #8b949e;
    --color-text-faint:       #484f58;
    --color-text-inverse:     #0d1117;
    --color-primary:          #3dbcc9;
    --color-primary-hover:    #56d4e0;
    --color-primary-active:   #2aa3b0;
    --color-primary-highlight: #1a3038;
    --color-success:          #56d364;
    --color-success-hover:    #3fb950;
    --color-warning:          #e3b341;
    --color-error:            #f85149;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}

/* ===================================================
   GLOBAL LAYOUT
   =================================================== */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--content-default);
}

/* ===================================================
   RESEARCH-USE-ONLY BANNER (Top of every page)
   =================================================== */
.research-banner {
  background: var(--color-surface-offset);
  padding: var(--space-2) 0;
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-divider);
}

.research-banner svg {
  display: inline;
  vertical-align: -2px;
  margin-right: var(--space-1);
}

/* ===================================================
   HEADER / NAV
   =================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-4) 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-interactive);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}

.theme-toggle:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

/* Mobile menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 2px 0;
}

.mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6);
    gap: var(--space-4);
    z-index: 99;
  }
  .nav-links.open { display: flex; }
}

/* ===================================================
   AGE VERIFICATION GATE
   =================================================== */
.age-gate {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-6);
}

.age-gate.active {
  display: flex;
}

.age-gate-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  max-width: 480px;
  width: 100%;
  text-align: center;
}

.age-gate-card .logo {
  display: inline-flex;
  margin-bottom: var(--space-6);
}

.age-gate-card h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.age-gate-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
  max-width: none;
}

.age-gate-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.age-gate-actions .btn {
  width: 100%;
  padding: var(--space-4) var(--space-6);
}

.age-gate-disclaimer {
  margin-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.5;
}

/* ===================================================
   FOOTER
   =================================================== */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: clamp(var(--space-10), 4vw, var(--space-16)) 0;
  margin-top: clamp(var(--space-12), 6vw, var(--space-24));
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

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

.footer-brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: var(--space-3);
  max-width: 32ch;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
}

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

.footer-bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.footer-bottom p,
.footer-bottom a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

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

.footer-disclaimer {
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: none;
}

/* ===================================================
   BUTTONS
   =================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              transform var(--transition-interactive);
}

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

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

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

.btn-success {
  background: var(--color-success) !important;
  color: #fff !important;
  border-color: var(--color-success) !important;
}

/* ===================================================
   CARDS
   =================================================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

/* ===================================================
   BADGES / TAGS
   =================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
}

.badge--muted {
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  border-color: var(--color-divider);
}

.badge--new {
  background: #fef3c7;
  color: #92400e;
  border-color: #fbbf24;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.65rem;
}

[data-theme="dark"] .badge--new {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.3);
}

.badge--pen {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
  gap: var(--space-1);
}

.badge--pen svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

.badge--category {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* ===================================================
   SECTION SPACING
   =================================================== */
.section {
  padding-block: clamp(var(--space-10), 6vw, var(--space-20));
}

.section--tight {
  padding-block: clamp(var(--space-6), 4vw, var(--space-12));
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 60ch;
}

/* ===================================================
   HERO
   =================================================== */
.hero {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0 clamp(var(--space-12), 6vw, var(--space-20));
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 680px;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

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

.hero p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  margin-bottom: var(--space-6);
  max-width: 52ch;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-highlight);
  border: 1px solid color-mix(in srgb, var(--color-primary) 15%, transparent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

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

.hero-bg {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--color-primary) 6%, transparent) 0%,
    transparent 70%
  );
  pointer-events: none;
}

/* Hero stats strip */
.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  flex-wrap: wrap;
}

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

.hero-stat .stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--color-primary);
  display: block;
}

.hero-stat .stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ===================================================
   PRODUCT GRID
   =================================================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

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

.product-card-header {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-1);
}

.product-card .product-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.product-card .product-fullname {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: calc(-1 * var(--space-2));
}

.product-card .product-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.product-card-wrapper {
  height: 100%;
}
.product-card-wrapper > .product-card {
  height: 100%;
  display: flex;
  flex-direction: column;
}
.product-card .product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
}

.product-price {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.product-price span {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-muted);
}

/* ===================================================
   CATEGORY GRID
   =================================================== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
}

.category-card {
  padding: var(--space-5) var(--space-4);
  text-decoration: none;
  text-align: left;
}

.category-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.category-card p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ===================================================
   VALUE PROPS
   =================================================== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 600px) {
  .value-grid {
    grid-template-columns: 1fr;
  }
}

.value-item {
  padding: var(--space-6);
  border-left: 3px solid var(--color-primary);
}

.value-item h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.value-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ===================================================
   HOW IT WORKS / STEPS
   =================================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  counter-reset: step;
}

@media (max-width: 700px) {
  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.step {
  counter-increment: step;
  position: relative;
  padding-left: var(--space-8);
}

.step::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-primary);
  opacity: 0.3;
  line-height: 1;
}

.step h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ===================================================
   FILTERS / TOOLBAR
   =================================================== */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-8);
}

.search-input {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
  font-size: var(--text-sm);
  color: var(--color-text);
  width: 200px;
  transition: border-color var(--transition-interactive);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.search-input::placeholder {
  color: var(--color-text-faint);
}

.filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  cursor: pointer;
  transition: all var(--transition-interactive);
}

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

.filter-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.sort-select {
  margin-left: auto;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
  font-size: var(--text-xs);
  color: var(--color-text);
  cursor: pointer;
}

.no-results {
  padding: var(--space-10);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ===================================================
   PRODUCT DETAIL
   =================================================== */
.detail-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

@media (max-width: 768px) {
  .detail-header {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.detail-visual {
  background: #18191b;
  border-radius: var(--radius-lg);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.detail-visual .pen-icon {
  width: 60%;
  height: auto;
  opacity: 0.15;
}

.detail-info h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  margin-bottom: var(--space-1);
}

.detail-info .fullname {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.detail-info .description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

/* Size selector */
.size-selector {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.size-btn {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  border: 2px solid var(--color-divider);
  background: var(--color-surface);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-interactive);
  min-width: 100px;
}

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

.size-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}

.size-btn .size-label {
  font-weight: 600;
  font-size: var(--text-sm);
  display: block;
}

.size-btn .size-price {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Molecular table */
.mol-table {
  width: 100%;
  margin: var(--space-6) 0;
}

.mol-table th {
  text-align: left;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-offset);
}

.mol-table th:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.mol-table th:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.mol-table td {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-divider);
}

.mol-table tr:last-child td {
  border-bottom: none;
}

/* Volume discounts */
.discount-table {
  margin: var(--space-6) 0;
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.discount-table table {
  width: 100%;
}

.discount-table th {
  background: var(--color-surface-offset);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.discount-table td {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-divider);
}

.discount-table tr:last-child td {
  border-bottom: none;
}

.discount-tag {
  font-weight: 600;
  color: var(--color-success);
}

/* Research area tags */
.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0;
}

/* Related products */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
}

/* ===================================================
   COA LOOKUP (Quality Page)
   =================================================== */
.coa-lookup {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.coa-lookup h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.coa-lookup p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.coa-form {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.coa-form input {
  flex: 1;
  min-width: 200px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  background: var(--color-surface-2);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.coa-form input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.coa-result {
  margin-top: var(--space-6);
  display: none;
}

.coa-result.active {
  display: block;
}

.coa-result-card {
  padding: var(--space-6);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  text-align: center;
}

.coa-result-card .coa-result-icon {
  margin-bottom: var(--space-3);
}

.coa-result-card .coa-result-icon svg {
  display: inline-block;
}

.coa-result-card h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.coa-result-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin: 0 auto;
}

.coa-result-card a {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ===================================================
   QUALITY FEATURES GRID
   =================================================== */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.quality-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}

.quality-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.quality-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

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

/* ===================================================
   SHIPPING FEATURES
   =================================================== */
.shipping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
}

.shipping-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}

.shipping-item-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.shipping-item h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}

.shipping-item p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ===================================================
   PEN BENEFITS CHECKLIST
   =================================================== */
.pen-benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pen-benefits li {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  align-items: flex-start;
}

.pen-benefits li svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

/* ===================================================
   RESEARCH / BLOG
   =================================================== */
.article-featured {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (max-width: 768px) {
  .article-featured {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.article-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.article-card-body {
  padding: var(--space-5) var(--space-6);
}

.article-card-body .article-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.article-card-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.article-card-body p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.article-thumb {
  aspect-ratio: 16/9;
  background: var(--color-surface-offset);
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-thumb-icon {
  width: 64px;
  height: 64px;
  color: var(--color-text-faint);
  opacity: 0.5;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

/* ===================================================
   FAQ ACCORDION
   =================================================== */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.accordion-item {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-interactive);
}

.accordion-item.open {
  border-color: var(--color-primary);
}

.accordion-trigger {
  width: 100%;
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  text-align: left;
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-surface);
  cursor: pointer;
}

.accordion-trigger:hover {
  background: var(--color-surface-2);
}

.accordion-trigger svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  transition: transform 0.3s ease;
}

.accordion-item.open .accordion-trigger svg {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-content-inner {
  padding: 0 var(--space-6) var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===================================================
   ABOUT PAGE
   =================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin: var(--space-10) 0;
}

@media (max-width: 600px) {
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}

.stat-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===================================================
   CONTACT PAGE
   =================================================== */
.order-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin: var(--space-8) 0;
  counter-reset: orderstep;
}

@media (max-width: 768px) {
  .order-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.order-step {
  counter-increment: orderstep;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  position: relative;
}

.order-step::before {
  content: counter(orderstep);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--color-primary);
  opacity: 0.4;
  display: block;
  margin-bottom: var(--space-2);
}

.order-step h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
}

.order-step p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.contact-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

@media (max-width: 600px) {
  .contact-details {
    grid-template-columns: 1fr;
  }
}

.contact-block {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}

.contact-block h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
}

.contact-block p,
.contact-block li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.contact-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* Form Validation Errors */
.input-error {
  border-color: #e53e3e !important;
  background: rgba(229, 62, 62, 0.04) !important;
}

.input-error:focus {
  border-color: #e53e3e !important;
  box-shadow: 0 0 0 2px rgba(229, 62, 62, 0.15);
}

.field-error {
  display: block;
  font-size: var(--text-xs);
  color: #e53e3e;
  margin-top: 4px;
  min-height: 0;
}

/* ===================================================
   RESEARCH DISCLAIMER BAR
   =================================================== */
.disclaimer-bar {
  background: var(--color-surface-offset);
  padding: var(--space-4) 0;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-divider);
}

.disclaimer-inline {
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-warning);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===================================================
   FIRST ORDER DISCOUNT BANNER
   =================================================== */
.promo-banner {
  background: linear-gradient(135deg, var(--color-primary-highlight), var(--color-surface));
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.promo-banner-text {
  flex: 1;
  min-width: 200px;
}

.promo-banner-text h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}

.promo-banner-text p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.promo-code {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 2px dashed var(--color-primary);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

/* ===================================================
   SCROLL ANIMATIONS
   =================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================================
   UTILITIES
   =================================================== */
.text-center { text-align: center; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Page title area */
.page-header {
  padding: clamp(var(--space-10), 5vw, var(--space-16)) 0 clamp(var(--space-6), 3vw, var(--space-10));
}

.page-header h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.page-header p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 60ch;
}

/* Stacks callout */
.stacks-callout {
  background: linear-gradient(135deg, var(--color-surface), var(--color-primary-highlight));
  border: 1px solid color-mix(in srgb, var(--color-primary) 15%, transparent);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}

@media (max-width: 768px) {
  .stacks-callout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.stacks-callout h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.stacks-callout p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.stack-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.stack-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.stack-list li .stack-price {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
}

/* ===================================================
   CART ICON & BADGE
   =================================================== */
.cart-icon-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.cart-icon-link:hover { color: var(--color-primary); }
.cart-badge {
  position: absolute;
  top: 0;
  right: -4px;
  min-width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ef4444;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  border-radius: 50%;
  line-height: 1;
  padding: 0 5px;
  box-shadow: 0 2px 6px rgba(239,68,68,0.4);
}

/* ===================================================
   TOAST NOTIFICATIONS
   =================================================== */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}
.toast {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-divider);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
  animation: toastIn 0.3s ease;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: auto;
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===================================================
   QUANTITY SELECTOR
   =================================================== */
.qty-selector {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.qty-btn {
  width: 40px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  color: #ffffff;
  border: none;
  cursor: pointer;
  font-size: 18px;
  font-weight: 800;
  transition: background var(--transition-interactive);
}
.qty-btn:hover { background: var(--color-primary-highlight); color: var(--color-primary); }
.qty-input {
  width: 52px;
  height: 36px;
  text-align: center;
  border: none;
  border-left: 1px solid var(--color-divider);
  border-right: 1px solid var(--color-divider);
  background: #ffffff;
  color: #000000;
  font-size: var(--text-base);
  font-weight: 800;
  -moz-appearance: textfield;
}
.qty-input::-webkit-inner-spin-button,
.qty-input::-webkit-outer-spin-button { -webkit-appearance: none; }

/* ===================================================
   CHECKOUT / CART PAGE
   =================================================== */
.cart-items { display: flex; flex-direction: column; gap: var(--space-3); }
.cart-item {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}
.cart-item-info h4 { font-family: var(--font-display); font-weight: 700; font-size: var(--text-base); color: var(--color-text); }
.cart-item-info p { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 2px; }
.cart-item-price { font-weight: 600; color: var(--color-text); font-size: var(--text-sm); white-space: nowrap; }
.cart-item-total { font-weight: 700; color: var(--color-primary); font-size: var(--text-sm); white-space: nowrap; }
.cart-item-remove {
  background: none; border: none; cursor: pointer;
  color: var(--color-text-faint); padding: var(--space-2);
  transition: color var(--transition-interactive);
}
.cart-item-remove:hover { color: #ef4444; }

.cart-summary {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-top: var(--space-6);
}
.cart-summary-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-2) 0;
  font-size: var(--text-sm); color: var(--color-text-muted);
}
.cart-summary-row.total {
  border-top: 1px solid var(--color-divider);
  margin-top: var(--space-3); padding-top: var(--space-3);
  font-size: var(--text-lg); font-weight: 800; color: var(--color-text);
}
.cart-summary-row.total .thb { font-size: var(--text-sm); color: var(--color-text-faint); font-weight: 500; margin-left: var(--space-2); }

.cart-empty {
  text-align: center; padding: var(--space-12) var(--space-6);
  color: var(--color-text-muted);
}
.cart-empty svg { margin-bottom: var(--space-4); color: var(--color-text-faint); }
.cart-empty h2 { font-family: var(--font-display); font-weight: 700; margin-bottom: var(--space-3); color: var(--color-text); }
.cart-empty p { margin-bottom: var(--space-6); }

@media (max-width: 640px) {
  .cart-item { grid-template-columns: 1fr; gap: var(--space-2); }
  .cart-item-price, .cart-item-total { text-align: left; }
  .toast-container { left: var(--space-4); right: var(--space-4); bottom: var(--space-4); }
}

/* Guarantee + How to Order grid */
.guarantee-order-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}
@media (max-width: 768px) {
  .guarantee-order-grid { grid-template-columns: 1fr; }
}

/* Vial + Steps grid */
.vial-steps-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-8);
  align-items: center;
}
@media (max-width: 768px) {
  .vial-steps-grid { grid-template-columns: 1fr; }
  .vial-steps-grid > div:last-child { order: -1; }
}

/* ===================================================
   HEADER SEARCH BAR
   =================================================== */
.header-search {
  position: relative;
  margin-right: var(--space-2);
}
.header-search input {
  width: 180px;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-8);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
  font-size: var(--text-xs);
  color: var(--color-text);
  transition: width 0.3s, border-color 0.2s;
}
.header-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  width: 240px;
}
.header-search input::placeholder { color: var(--color-text-faint); }
.header-search .search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-faint);
  pointer-events: none;
}
.header-search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  min-width: 280px;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
  max-height: 320px;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  display: none;
  z-index: 1000;
}
.header-search-results.active { display: block; }
.header-search-results a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  transition: background 0.15s;
}
.header-search-results a:hover { background: var(--color-surface-offset); }
.header-search-results a .sr-cat {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.header-search-results .sr-empty {
  padding: var(--space-4);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

@media (max-width: 768px) {
  .header-search input { width: 140px; }
  .header-search input:focus { width: 180px; }
}
@media (max-width: 480px) {
  .header-search { display: none; }
}