/* =========================================================
   GuwLab Design System — Tokens (Foundations)
   Design tokens, reset, base layout, typography, utilities.
   Shared across all GuwLab pages.
   ========================================================= */

/* ── Design Tokens ── */

:root {
  --color-primary: #4E4E50;
  --color-accent: #5693A5;
  --color-white: #FFFFFF;

  --color-bg: #FFFFFF;
  --color-bg-soft: #F6F8F9;
  --color-border: #D7E0E4;
  --color-text: #4E4E50;
  --color-text-soft: #6B7478;
  --color-heading: #2F3133;

  --color-accent-dark: #467B8A;
  --color-accent-soft: rgba(86, 147, 165, 0.12);
  --color-primary-soft: rgba(78, 78, 80, 0.06);
  --color-agro: #0d7c66;

  --shadow-sm: 0 8px 24px rgba(78, 78, 80, 0.06);
  --shadow-md: 0 16px 40px rgba(78, 78, 80, 0.10);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --container: 1180px;

  --font-sans: "Montserrat", "Inter", "Segoe UI", Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", Arial, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 3rem;
  --text-4xl: 4rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 5rem;
  --space-10: 7rem;

  --line-tight: 1.08;
  --line-snug: 1.25;
  --line-normal: 1.6;
}

/* ── Reset ── */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--line-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

/* ── Base Layout ── */

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.section {
  padding: var(--space-10) 0;
}

.section-sm {
  padding: var(--space-8) 0;
}

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

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* ── Typography ── */

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-4);
  color: var(--color-heading);
  font-weight: 700;
  line-height: var(--line-tight);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, var(--text-4xl));
  max-width: 11ch;
}

h2 {
  font-size: clamp(1.9rem, 3.5vw, var(--text-3xl));
}

h3 {
  font-size: clamp(1.15rem, 2vw, var(--text-xl));
}

p {
  margin: 0 0 var(--space-4);
}

.lead {
  font-size: var(--text-md);
  color: var(--color-text-soft);
  max-width: 62ch;
}

.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.section-title {
  max-width: 14ch;
}

.section-intro {
  max-width: 65ch;
  color: var(--color-text-soft);
}

/* ── Body font (Inter for readability) ── */

p, li, dd, td,
.lead,
.product-card__description,
.section-intro {
  font-family: var(--font-body);
}

/* ── Utilities ── */

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

.max-w-lg {
  max-width: 52rem;
}

.mx-auto {
  margin-inline: auto;
}

.mb-0 {
  margin-bottom: 0;
}

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

/* ── Responsive (Foundations) ── */

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-8) 0;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 100%;
  }
}