/* ============================================================
   BASE.CSS — Variables globales, reset, typographie
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* --- Variables CSS --- */
:root {
  /* Couleurs */
  --color-bg:        #ffffff;
  --color-accent:    #00ADEF;
  --color-accent-dark: #0093CB;
  --color-text:      #1a1a1a;
  --color-text-muted:#6b7280;
  --color-surface:   #f9fafb;
  --color-border:    #e5e7eb;
  --color-dark:      #111827;

  /* Typographie */
  --font-family: 'Poppins', sans-serif;
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.25rem;
  --fs-xl:   1.5rem;
  --fs-2xl:  2rem;
  --fs-3xl:  2.75rem;
  --fs-4xl:  3.5rem;

  /* Espacements */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Bordures */
  --radius-sm:  0.375rem;
  --radius-md:  0.75rem;
  --radius-lg:  1.25rem;
  --radius-xl:  2rem;
  --radius-full: 9999px;

  /* Ombres */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:  0 10px 40px rgba(0,0,0,0.10);
  --shadow-accent: 0 4px 20px rgba(0,173,239,0.35);

  /* Transitions */
  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Layout */
  --container-max: 1200px;
  --header-h: 72px;
}

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

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

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: var(--font-family);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
}

/* --- Utilitaires typographiques --- */
.text-accent   { color: var(--color-accent-dark); }
.text-muted    { color: var(--color-text-muted); }
.text-center   { text-align: center; }
.font-light    { font-weight: 300; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }

/* --- Container centré --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* --- Section padding standard --- */
.section {
  padding-block: var(--space-24);
}

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

/* --- Titre de section --- */
.section__label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  background: rgba(0,173,239,0.15);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section__title {
  font-size: clamp(var(--fs-xl), 3vw, var(--fs-3xl));
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* --- Visually hidden (accessibilité) --- */
.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;
}