/* ============================================================
   SOLARTEST — main.css
   Variables del design system + reset + utilitats globals
   Font: Inter · Paleta: Navy #003D78 + Green #89C600
   Design System v3 · simplificat (sense blau electric)
   ============================================================ */

/* ── Variables ──────────────────────────────────────────── */
:root {
  /* ---- BACKGROUNDS ---- */
  --color-bg:             #FFFFFF;
  --color-bg-alt:         #F7F8FA;      /* grey-50 — seccions alternes */
  --color-bg-card:        #FFFFFF;
  --color-bg-dark:        #003D78;      /* navy-500 — footer, heroes */
  --color-bg-dark-alt:    #001E50;      /* navy-900 — hover sobre fons fosc */
  --color-bg-dark-2:      #001E50;      /* navy-900 — alias */

  /* ---- NAVY — protagonista (titulars, CTAs, links) ---- */
  --color-accent:         #003D78;      /* navy-500 */
  --color-accent-lighter: #B5C7DC;      /* navy-100 — detalls sobre fons fosc */
  --color-accent-dark:    #001E50;      /* navy-900 — hover de CTA */
  --color-accent-darker:  #001E50;      /* navy-900 — alias */
  --color-accent-muted:   #003D78;      /* navy-500 — alias */
  --color-accent-subtle:  rgba(0,61,120,0.08);

  /* ---- GREEN — accent (icones, pills, detalls) ---- */
  --color-secondary:        #89C600;    /* green-500 — principal */
  --color-secondary-dark:   #5C8506;    /* green-700 — text sobre clar (AA 4.5:1) */
  --color-secondary-subtle: rgba(137,198,0,0.10);

  /* ---- TEXT ---- */
  --color-text-heading:   #003D78;      /* navy — headings */
  --color-text-body:      #3D4455;      /* grey-700 */
  --color-text-secondary: #5A6478;      /* grey-600 — 5.7:1 on white (WCAG AA ✓) */
  --color-text-muted:     #9DA3B4;      /* grey-400 */
  --color-text-on-dark:   #F0F0F0;

  /* ---- BORDERS ---- */
  --color-border:         #EDEEF2;      /* grey-100 */
  --color-border-medium:  #D5D8E0;      /* grey-200 */
  --color-border-accent:  var(--color-accent);

  /* ---- FEEDBACK ---- */
  --color-success:        #22C55E;
  --color-error:          #EF4444;

  /* ---- SPACING — escala 4px ---- */
  --space-1:  4px;  --space-2:  8px;  --space-3:  12px; --space-4:  16px;
  --space-5:  20px; --space-6:  24px; --space-8:  32px; --space-10: 40px;
  --space-12: 48px; --space-16: 64px; --space-20: 80px; --space-24: 96px;
  --space-32: 128px;

  /* ---- LAYOUT ---- */
  --container-max:     1440px;
  --container-padding: clamp(16px, 4vw, 48px);
  --grid-gap:          24px;

  /* ---- BORDER RADIUS ---- */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-2xl:  24px;
  --radius-full: 9999px;

  /* ---- SHADOWS — neutrales (DS + shadcn) ---- */
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.07), 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 12px 32px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.05);
  --shadow-xl:  0 20px 48px rgba(0,0,0,0.12);
  --shadow-cta: 0 4px 16px rgba(8,67,186,0.30);

  /* ---- TRANSITIONS ---- */
  --transition:      220ms cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 400ms cubic-bezier(0.4,0,0.2,1);

  /* ---- TYPOGRAPHY ---- */
  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* ---- SHORTHAND ALIASES (design system tokens) ---- */
  --navy:       #003D78;
  --navy-deep:  #001E50;
  --navy-light: #B5C7DC;
  --green:      #89C600;
  --green-dark: #5C8506;
  --green-10:   rgba(137,198,0,0.10);
  --white:      #FFFFFF;
  --grey-50:    #F7F8FA;
  --grey-100:   #EDEEF2;
  --grey-200:   #D5D8E0;
  --grey-400:   #9DA3B4;
  --grey-700:   #3D4455;
  --grey-900:   #111827;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text-body);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-dark);
}

ul, ol {
  list-style: none;
}

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

/* Focus visible — accessibilitat */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Skip link — WCAG 2.4.1: visible en rebre focus de teclat */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-2) var(--space-5);
  background: var(--color-bg-dark);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: top 150ms;
}

.skip-link:focus-visible {
  top: var(--space-2);
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* ── Tipografia — Untitled UI tracking scale ─────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-base);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text-heading);
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);     /* 32–64px */
  letter-spacing: -0.025em;
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.625rem, 3.5vw, 2.75rem); /* 26–44px */
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h3 {
  font-size: clamp(1.125rem, 2vw, 1.625rem); /* 18–26px */
  letter-spacing: -0.01em;
  font-weight: 600;
}

h4 {
  font-size: clamp(1rem, 1.5vw, 1.25rem);   /* 16–20px */
  letter-spacing: -0.005em;
  font-weight: 600;
}

p {
  max-width: 68ch;
}

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

strong { font-weight: 600; }
em     { font-style: italic; }

/* ── Utilitats de layout ─────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

@media (min-width: 768px) {
  .section { padding-top: var(--space-24); padding-bottom: var(--space-24); }
}

.section--sm {
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
}

.section--lg {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}

@media (min-width: 768px) {
  .section--lg { padding-top: var(--space-32); padding-bottom: var(--space-32); }
}

/* Grid bàsic */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
}

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

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

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

/* ── Utilitats tipogràfiques ─────────────────────────────── */
.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);  /* gris-blau sobre fons clar — 5.7:1 ✓ */
  margin-bottom: var(--space-3);
}

.text-muted    { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-heading  { color: var(--color-text-heading); }
.text-accent   { color: var(--color-accent); }
.text-secondary-color { color: var(--color-secondary); }
.text-center   { text-align: center; }
.text-sm       { font-size: 0.875rem; }
.text-xs       { font-size: 0.75rem; }

/* ── Utilitats de display ────────────────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.d-flex        { display: flex; }
.align-center  { align-items: center; }
.gap-2         { gap: var(--space-2); }
.gap-3         { gap: var(--space-3); }
.gap-4         { gap: var(--space-4); }

/* ── Imatges ─────────────────────────────────────────────── */
.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

/* ── Breadcrumb ──────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.breadcrumb li::after {
  content: '/';
  margin-left: var(--space-2);
  opacity: .5;
}

.breadcrumb li:last-child::after {
  display: none;
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

.breadcrumb--dark,
.breadcrumb--dark a {
  color: rgba(255,255,255,.7);
}

.breadcrumb--dark a:hover { color: #fff; }

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-medium);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.badge--accent {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent-lighter);
  color: var(--color-accent-darker);
}

.badge--secondary {
  background: var(--color-secondary-subtle);
  border-color: var(--color-secondary);
  color: var(--color-accent-muted);  /* navy — contrast ✓ (era #6da000: 2.98:1 ✗) */
}

/* ── Notices ─────────────────────────────────────────────── */
.notice-banner {
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: var(--space-6);
}

.notice-banner--ok {
  background: var(--color-secondary-subtle);
  color: var(--color-secondary-dark);
  border: 1px solid var(--color-secondary);
}

.notice-banner--error {
  background: #FEF2F2;
  color: #991B1B;
  border: 1px solid var(--color-error);
}

/* ── Icones Lucide ───────────────────────────────────────── */
i[data-lucide] {
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}