/* ============================================================
   ProRisk — Feuille de styles principale
   Mobile-first · CSS Variables · Sémantique HTML5
   ============================================================ */

/* ---- Variables ---- */
:root {
  /* Couleurs */
  --color-primary:      #1a2744;   /* Navy profond — fiabilité, sérieux */
  --color-primary-dark: #111c35;
  --color-secondary:    #2563eb;   /* Bleu vif — confiance, technologie */
  --color-secondary-light: #3b82f6;
  --color-accent:       #f59e0b;   /* Ambre — CTA, attention, énergie */
  --color-accent-dark:  #d97706;
  --color-success:      #10b981;

  --color-text:         #1e293b;
  --color-text-light:   #64748b;
  --color-text-xlight:  #94a3b8;

  --color-bg:           #f8fafc;
  --color-bg-alt:       #eef2f8;
  --color-white:        #ffffff;
  --color-border:       #e2e8f0;

  /* Typographie */
  --font-family:        'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base:     1rem;      /* 16px */

  --text-xs:    0.75rem;
  --text-sm:    0.875rem;
  --text-base:  1rem;
  --text-lg:    1.125rem;
  --text-xl:    1.25rem;
  --text-2xl:   1.5rem;
  --text-3xl:   1.875rem;
  --text-4xl:   2.25rem;
  --text-5xl:   3rem;

  --weight-regular: 400;
  --weight-medium:  500;
  --weight-semi:    600;
  --weight-bold:    700;
  --weight-xbold:   800;

  --leading-tight:  1.2;
  --leading-normal: 1.6;
  --leading-relaxed:1.8;

  /* Espacement */
  --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;

  /* Layout */
  --container-max: 1200px;
  --container-padding: var(--space-5);

  /* Radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  20px;
  --radius-full:9999px;

  /* Ombres */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:  0 10px 40px rgba(0,0,0,.14);
  --shadow-xl:  0 20px 60px rgba(0,0,0,.18);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow:   400ms ease;

  /* Header */
  --header-height: 68px;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol { list-style: none; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

button { cursor: pointer; }

address { font-style: normal; }

h1, h2, h3, h4 {
  line-height: var(--leading-tight);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
}

/* ============================================================
   UTILITAIRES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

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

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

.section__header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.section__eyebrow {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-xbold);
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   BOUTONS
   ============================================================ */
.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-base);
  font-weight: var(--weight-semi);
  transition: background-color var(--transition-normal),
              color var(--transition-normal),
              transform var(--transition-fast),
              box-shadow var(--transition-normal);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.btn:active { transform: scale(0.97); }

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

.btn--primary:hover {
  background-color: var(--color-accent-dark);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  border: 2px solid rgba(255,255,255,.5);
  color: var(--color-white);
  background-color: transparent;
}

.btn--ghost:hover {
  background-color: rgba(255,255,255,.12);
  border-color: var(--color-white);
}

.btn--full { width: 100%; }

/* ============================================================
   ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal--right {
  transform: translateX(24px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translate(0);
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  transition: box-shadow var(--transition-normal);
}

.header.is-scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  flex-shrink: 0;
}

.logo__icon {
  font-size: var(--text-2xl);
}

.logo__text strong {
  color: var(--color-secondary);
}

/* Nav desktop (masqué sur mobile) */
.header__nav {
  display: none;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  padding-block: var(--space-1);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-secondary);
  border-bottom-color: var(--color-secondary);
}

.nav__link--cta {
  padding: var(--space-2) var(--space-5);
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  border-bottom: none;
  font-weight: var(--weight-semi);
}

.nav__link--cta:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-primary);
}

/* Burger button */
.header__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.header__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
  transform-origin: center;
}

.header__burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header__burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.header__burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav open */
.header__nav.is-open {
  display: block;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) var(--container-padding) var(--space-6);
  box-shadow: var(--shadow-lg);
}

.header__nav.is-open .nav__list {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}

.header__nav.is-open .nav__link {
  display: block;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-base);
}

.header__nav.is-open .nav__link--cta {
  margin-top: var(--space-4);
  text-align: center;
  padding: var(--space-3);
  background-color: var(--color-accent);
  border-bottom: none;
  border-radius: var(--radius-md);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + var(--space-12));
  padding-bottom: var(--space-20);
  overflow: hidden;
  color: var(--color-white);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, var(--color-primary) 0%, #263562 50%, #1e3a6e 100%);
  z-index: 0;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(37,99,235,.25) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245,158,11,.12) 0%, transparent 50%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero__eyebrow {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}

.hero__title {
  font-size: var(--text-4xl);
  font-weight: var(--weight-xbold);
  line-height: 1.1;
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: rgba(255,255,255,.8);
  max-width: 600px;
  margin-bottom: var(--space-8);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}

.hero__trust li {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.7);
}

.hero__trust strong {
  display: block;
  font-size: var(--text-2xl);
  font-weight: var(--weight-xbold);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  color: rgba(255,255,255,.5);
  font-size: var(--text-xl);
  animation: bounce 2s infinite;
  transition: color var(--transition-fast);
}

.hero__scroll:hover { color: var(--color-white); }

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   À PROPOS
   ============================================================ */
.apropos__grid {
  display: grid;
  gap: var(--space-12);
}

.apropos__image-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  height: 320px;
  background: linear-gradient(135deg, var(--color-bg-alt), var(--color-border));
  border-radius: var(--radius-xl);
  color: var(--color-text-light);
  font-size: var(--text-sm);
  border: 2px dashed var(--color-border);
}

.apropos__image-placeholder span {
  font-size: 3rem;
}

.apropos__text .section__title {
  margin-bottom: var(--space-4);
}

.apropos__text p {
  color: var(--color-text-light);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.apropos__values {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.apropos__values li {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.value__icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  margin-top: 2px;
}

.apropos__values strong {
  display: block;
  font-size: var(--text-base);
  font-weight: var(--weight-semi);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.apropos__values p {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin: 0;
}

/* ============================================================
   SERVICES
   ============================================================ */
.services__grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.service-card__icon {
  font-size: 2.25rem;
  margin-bottom: var(--space-4);
}

.service-card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.service-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.service-card__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  color: var(--color-secondary);
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.service-card__link:hover { color: var(--color-primary); }

/* ============================================================
   TÉMOIGNAGES
   ============================================================ */
.temoignages__grid {
  display: grid;
  gap: var(--space-6);
}

.temoignage-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: relative;
}

.temoignage-card::before {
  content: '\201C';
  position: absolute;
  top: var(--space-4);
  left: var(--space-6);
  font-size: 5rem;
  line-height: 1;
  color: var(--color-bg-alt);
  font-family: Georgia, serif;
  pointer-events: none;
}

.temoignage-card__text {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  position: relative;
  padding-top: var(--space-6);
}

.temoignage-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.author__avatar {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
}

.author__name {
  display: block;
  font-weight: var(--weight-semi);
  font-size: var(--text-base);
  font-style: normal;
  color: var(--color-primary);
}

.author__role {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-top: 2px;
}

/* ============================================================
   GALERIE
   ============================================================ */
.galerie__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.galerie__item {
  overflow: hidden;
  border-radius: var(--radius-lg);
  cursor: pointer;
}

.galerie__img {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  transition: transform var(--transition-slow);
  background-size: cover;
  background-position: center;
}

.galerie__item:hover .galerie__img {
  transform: scale(1.04);
}

figcaption {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  padding: var(--space-2) var(--space-1);
  text-align: center;
}

/* Placeholder colorés pour les images de galerie */
.galerie__img--1 { background-color: #d1e8ff; background-image: linear-gradient(135deg, #b3d4f5, #d1e8ff); }
.galerie__img--2 { background-color: #d4f1e4; background-image: linear-gradient(135deg, #a8e6c7, #d4f1e4); }
.galerie__img--3 { background-color: #fde8cc; background-image: linear-gradient(135deg, #ffd09b, #fde8cc); }
.galerie__img--4 { background-color: #e8d8f8; background-image: linear-gradient(135deg, #cfb3ef, #e8d8f8); }
.galerie__img--5 { background-color: #ffd6d6; background-image: linear-gradient(135deg, #ffb3b3, #ffd6d6); }
.galerie__img--6 { background-color: #d6f0f8; background-image: linear-gradient(135deg, #a3dff0, #d6f0f8); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  background: linear-gradient(135deg, var(--color-primary) 0%, #263562 100%);
  color: var(--color-white);
}

.contact .section__eyebrow {
  color: var(--color-accent);
}

.contact .section__title {
  color: var(--color-white);
}

.contact__grid {
  display: grid;
  gap: var(--space-12);
}

.contact__info > p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: rgba(255,255,255,.75);
  margin-bottom: var(--space-8);
  margin-top: var(--space-4);
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact__detail-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.detail__icon {
  font-size: var(--text-xl);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact__detail-item strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  color: var(--color-accent);
  margin-bottom: 2px;
}

.contact__detail-item p,
.contact__detail-item a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.7);
}

.contact__detail-item a:hover { color: var(--color-white); text-decoration: underline; }

/* Formulaire */
.contact__form-wrapper {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.form__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
}

.form__label span { color: var(--color-accent-dark); }

.form__input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__input::placeholder {
  color: var(--color-text-xlight);
}

.form__input:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
  background-color: var(--color-white);
}

.form__input:invalid:not(:placeholder-shown) {
  border-color: #ef4444;
}

.form__select { appearance: none; cursor: pointer; }

.form__textarea { resize: vertical; min-height: 100px; }

.form__required-note {
  font-size: var(--text-xs);
  color: var(--color-text-xlight);
  margin-bottom: var(--space-4);
}

.form__feedback {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-align: center;
}

.form__feedback--success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.form__feedback--error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-primary-dark);
  color: rgba(255,255,255,.7);
}

.footer__inner {
  display: grid;
  gap: var(--space-10);
  padding-block: var(--space-12);
}

.footer__brand .header__logo {
  color: var(--color-white);
  margin-bottom: var(--space-4);
  font-size: var(--text-xl);
}

.footer__brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.footer__nav-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

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

.footer__nav a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.6);
  transition: color var(--transition-fast);
}

.footer__nav a:hover { color: var(--color-white); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-block: var(--space-5);
  text-align: center;
}

.footer__bottom p {
  font-size: var(--text-xs);
  color: rgba(255,255,255,.4);
}

/* ============================================================
   RESPONSIVE — TABLETTE (≥ 640px)
   ============================================================ */
@media (min-width: 640px) {
  :root {
    --container-padding: var(--space-8);
  }

  .hero__title { font-size: var(--text-5xl); }

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

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

/* ============================================================
   RESPONSIVE — DESKTOP (≥ 1024px)
   ============================================================ */
@media (min-width: 1024px) {
  :root {
    --container-padding: var(--space-6);
  }

  /* Header */
  .header__burger { display: none; }
  .header__nav { display: block; }

  /* Hero */
  .hero__title { font-size: clamp(2.5rem, 4vw, 3.5rem); }

  /* À propos */
  .apropos__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-16);
  }

  .apropos__image-placeholder { height: 440px; }

  /* Services */
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Témoignages */
  .temoignages__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Contact */
  .contact__grid {
    grid-template-columns: 1fr 1.2fr;
    align-items: start;
    gap: var(--space-16);
  }

  /* Footer */
  .footer__inner {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-16);
  }
}

/* ============================================================
   ACCESSIBILITÉ — FOCUS & REDUCED MOTION
   ============================================================ */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__scroll { animation: none; }

  .service-card,
  .galerie__img {
    transition: none;
  }
}