/* ============================================================
   PUENTE SCIENTIFIC — MODERN LAYER (modern.css)
   ------------------------------------------------------------
   Purpose: additive refinement layer loaded AFTER all other
   stylesheets (see _includes/head.html). It modernizes type,
   spacing, surfaces, and responsiveness WITHOUT replacing or
   editing existing CSS files.

   Safety design:
   - Theme-agnostic: borders/surfaces use color-mix with
     currentColor, so they adapt to light AND dark mode.
   - No transforms on slider arrows/dots/scroll indicator
     (existing CSS likely positions them via translate).
   - No changes to loading screen, slider track, or nav toggle
     mechanics (JS-controlled).
   - Rollback: delete this file + its <link> in head.html.

   Protected content untouched: hero title, 45/2025/85 stats,
   Products nav link, contact details. (See BUSINESS_CONTENT.md)
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root {
  --ps-accent: #2E6BE6;            /* lab blue */
  --ps-spectrum: linear-gradient(90deg, #7C5CFF 0%, #2E6BE6 55%, #19B8A6 100%); /* UV→visible nod */
  --ps-ring: color-mix(in srgb, var(--ps-accent) 25%, transparent);

  --ps-hairline: color-mix(in srgb, currentColor 12%, transparent);
  --ps-hairline-strong: color-mix(in srgb, currentColor 22%, transparent);
  --ps-surface: color-mix(in srgb, currentColor 4%, transparent);
  --ps-surface-hover: color-mix(in srgb, currentColor 7%, transparent);

  --ps-radius-s: 10px;
  --ps-radius-m: 14px;
  --ps-radius-l: 20px;

  --ps-shadow-s: 0 1px 2px rgb(0 0 0 / 0.05), 0 2px 8px rgb(0 0 0 / 0.05);
  --ps-shadow-m: 0 2px 4px rgb(0 0 0 / 0.06), 0 10px 28px rgb(0 0 0 / 0.08);

  --ps-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 2. Foundations ---------- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3, h4 { text-wrap: balance; }
p { text-wrap: pretty; }

::selection { background: color-mix(in srgb, var(--ps-accent) 25%, transparent); }

:focus-visible {
  outline: 2px solid var(--ps-accent);
  outline-offset: 2px;
}

/* Form controls (checkboxes, etc.) pick up the brand accent */
input, textarea, select, button { accent-color: var(--ps-accent); }

/* ---------- 3. Fluid type scale ---------- */
.hero-title {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: clamp(2.4rem, 1.2rem + 6vw, 4.6rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.hero-subtitle {
  font-size: clamp(1rem, 0.92rem + 0.5vw, 1.2rem);
  line-height: 1.65;
}

.section-title,
.about-title,
.contact-title,
.legal-title,
.thank-you-title {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: clamp(1.8rem, 1.3rem + 2.4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.about-subtitle,
.legal-subtitle {
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.15rem);
}

/* Comfortable reading measure on long-form prose */
.about-text p,
.history-text p,
.vision-text p,
.legal-section p,
.contact-description {
  max-width: 65ch;
  line-height: 1.7;
}

/* ---------- 4. Signature: spectral calibration line ----------
   A hairline gradient under section titles — violet→blue→teal,
   echoing UV detection / the deuterium-lamp side of the catalog. */
.section-header .section-title {
  position: relative;
  padding-bottom: 0.9rem;
}
.section-header .section-title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 64px;
  height: 3px;
  margin-left: -32px; /* center without transform */
  border-radius: 999px;
  background: var(--ps-spectrum);
}

/* ---------- 5. Nav + footer refinement ---------- */
.navbar {
  border-bottom: 1px solid var(--ps-hairline);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  backdrop-filter: saturate(140%) blur(12px);
}

.nav-link {
  border-radius: 8px;
  transition: color 0.2s var(--ps-ease), background-color 0.2s var(--ps-ease), opacity 0.2s var(--ps-ease);
}

.language-select {
  border-radius: var(--ps-radius-s);
  border: 1px solid var(--ps-hairline-strong);
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

.theme-toggle { cursor: pointer; }

.footer {
  border-top: 1px solid var(--ps-hairline);
}

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.2s var(--ps-ease), box-shadow 0.2s var(--ps-ease), opacity 0.2s var(--ps-ease);
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--ps-shadow-m);
}
.btn:active { transform: translateY(0); }

.btn-secondary { border: 1px solid var(--ps-hairline-strong); }

/* ---------- 7. Surfaces: stats, cards, slider, pills ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}
.stat-item {
  margin: 0;
  padding: 1.4rem 1.1rem;
  border: 1px solid var(--ps-hairline);
  border-radius: var(--ps-radius-m);
  background: var(--ps-surface);
  text-align: center;
  transition: transform 0.25s var(--ps-ease), border-color 0.25s var(--ps-ease), background-color 0.25s var(--ps-ease);
}
.stat-item:hover {
  transform: translateY(-3px);
  border-color: var(--ps-hairline-strong);
  background: var(--ps-surface-hover);
}
.stat-number {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-variant-numeric: tabular-nums; /* steady width during count-up */
  font-size: clamp(1.9rem, 1.4rem + 1.8vw, 2.6rem);
  font-weight: 700;
  line-height: 1.1;
}
.stat-label {
  margin-top: 0.45rem;
  font-size: 0.78rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  opacity: 0.75;
}

/* Contact page method cards */
.contact-method {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--ps-hairline);
  border-radius: var(--ps-radius-m);
  background: var(--ps-surface);
  transition: transform 0.25s var(--ps-ease), border-color 0.25s var(--ps-ease);
}
.contact-method:hover {
  transform: translateY(-2px);
  border-color: var(--ps-hairline-strong);
}
.contact-method + .contact-method { margin-top: 0.9rem; }

/* Homepage contact rows: lighter touch */
.contact-item {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--ps-hairline);
}
.contact-item:last-child { border-bottom: 0; }

/* Product slider polish (cosmetic only — no repositioning) */
.slider-container {
  border-radius: var(--ps-radius-l);
  overflow: hidden;
}
.visual-container { border-radius: var(--ps-radius-l); }
.slider-btn {
  border: 1px solid var(--ps-hairline-strong);
  border-radius: 999px;
  cursor: pointer;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: opacity 0.2s var(--ps-ease), border-color 0.2s var(--ps-ease), box-shadow 0.2s var(--ps-ease);
}
.slider-btn:hover { box-shadow: var(--ps-shadow-s); }
.slider-dot { cursor: pointer; transition: opacity 0.2s var(--ps-ease); }

/* Products page equipment list → tag pills */
.equipment-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.5rem;
}
.equipment-item {
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--ps-hairline-strong);
  border-radius: 999px;
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: border-color 0.2s var(--ps-ease), background-color 0.2s var(--ps-ease);
}
.equipment-item:hover { background: var(--ps-surface); }

/* Social icons: gentle lift */
.social-link { transition: transform 0.2s var(--ps-ease), opacity 0.2s var(--ps-ease); }
.social-link:hover { transform: translateY(-2px); }

/* Legal pages: centered reading column */
.legal-document {
  max-width: 760px;
  margin-inline: auto;
}
.legal-section + .legal-section { margin-top: 2.2rem; }

/* ---------- 8. Forms ---------- */
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  min-height: 44px; /* tap-friendly */
  padding: 0.8rem 1rem;
  border: 1px solid var(--ps-hairline-strong);
  border-radius: 12px;
  font: inherit;
  transition: border-color 0.2s var(--ps-ease), box-shadow 0.2s var(--ps-ease);
}
.form-group textarea { resize: vertical; }
.form-group input::placeholder,
.form-group textarea::placeholder { opacity: 0.6; }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--ps-accent);
  box-shadow: 0 0 0 3px var(--ps-ring);
}
.form-group + .form-group { margin-top: 1rem; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-row + .form-row,
.form-row + .form-group,
.form-group + .form-row { margin-top: 1rem; }
.form-row .form-group { margin-top: 0; }

/* Slider images are wrapped in <picture> for WebP; pass slide sizing through */
.slider-slide picture {
  width: 100%;
  height: 100%;
  display: block;
}

/* ---------- Products catalog ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-primary);
}

.product-card picture,
.product-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 800 / 446;
  object-fit: cover;
  display: block;
}

.product-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.75rem;
  padding: 1.5rem;
}

.product-card-body h3 {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
}

.product-card-body p {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  flex: 1;
}

.product-card-body .btn {
  align-self: flex-start;
}

.sourcing-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.sourcing-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sourcing-item h3 {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
}

.sourcing-item p {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  flex: 1;
}

.sourcing-item .btn {
  align-self: flex-start;
}

@media (max-width: 900px) {
  .product-grid { grid-template-columns: 1fr; }
  .sourcing-block { grid-template-columns: 1fr; }
}

/* Payment trust line shown near forms and on the products page */
.payment-note {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--text-tertiary, #888);
}

/* ---------- 9. Responsive collapses + mobile ergonomics ---------- */
@media (max-width: 900px) {
  .about-content,
  .history-content,
  .contact-content,
  .contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .about-visual { order: -1; } /* product imagery first on mobile */
}

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .section-header .section-title { padding-bottom: 0.75rem; }
}

@media (max-width: 480px) {
  .hero-buttons .btn {
    width: 100%;
  }
  .stat-item { padding: 1.1rem 0.9rem; }
  .scroll-indicator { display: none; } /* declutter short viewports */
}

/* ---------- 10. Motion & accessibility floor ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}