/* ===================================================
   BET Conception Environnement — Styles
   =================================================== */

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

:root {
  --color-primary: #1a5e3a;
  --color-primary-light: #2a7d50;
  --color-primary-dark: #134a2d;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f8f9;
  --color-bg-dark: #1a1f2b;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-text-white: #ffffff;
  --color-border: #dfe6e9;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --transition: 0.25s ease;
  --container: 1120px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

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

.btn--primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.nav--scrolled {
  border-bottom-color: var(--color-border);
}

.nav__container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav__logo-bet {
  color: var(--color-primary);
  font-weight: 700;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--transition);
}

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

.nav__cta {
  padding: 8px 20px;
  background: var(--color-primary);
  color: var(--color-text-white) !important;
  border-radius: var(--radius);
  font-weight: 600 !important;
}

.nav__cta:hover {
  background: var(--color-primary-light) !important;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1f2b 0%, #2d3436 50%, #1a5e3a 100%);
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(26,94,58,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(26,94,58,0.1) 0%, transparent 60%);
}

.hero__content {
  position: relative;
  text-align: center;
  padding: 0 24px;
  max-width: 780px;
}

.hero__badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: 24px;
  padding: 8px 20px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50px;
}

.hero__title {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 700;
  color: var(--color-text-white);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: 40px;
  font-weight: 400;
}

/* --- Sections --- */
.section {
  padding: 100px 0;
}

.section__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 12px;
  color: var(--color-text);
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.05rem;
  margin-bottom: 56px;
}

/* --- Présentation --- */
.presentation {
  background: var(--color-bg);
}

.presentation__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-top: 48px;
}

.presentation__text p {
  color: var(--color-text-light);
  font-size: 1.05rem;
  margin-bottom: 20px;
  line-height: 1.8;
}

.presentation__text p:last-child {
  margin-bottom: 0;
}

.presentation__stats {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.stat {
  padding: 28px 32px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.stat__number {
  display: block;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.stat__label {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* --- Prestations --- */
.prestations {
  background: var(--color-bg-alt);
}

.prestations__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,94,58,0.08);
  border-radius: var(--radius);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.card__text {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Pourquoi nous --- */
.pourquoi {
  background: var(--color-bg);
}

.pourquoi__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 56px;
}

.avantage {
  text-align: center;
}

.avantage__icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,94,58,0.08);
  border-radius: 50%;
  color: var(--color-primary);
  margin: 0 auto 20px;
}

.avantage__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.avantage__text {
  color: var(--color-text-light);
  font-size: 0.93rem;
  line-height: 1.7;
}

/* --- Contact --- */
.contact {
  background: var(--color-bg-alt);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  margin-top: 48px;
}

.form__group {
  margin-bottom: 20px;
}

.form__label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form__input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-main);
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition);
}

.form__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,94,58,0.1);
}

.form__input::placeholder {
  color: #b2bec3;
}

.form__textarea {
  min-height: 140px;
  resize: vertical;
}

.form__status {
  margin-top: 16px;
  font-size: 0.9rem;
  text-align: center;
  min-height: 24px;
}

.form__status--success { color: var(--color-primary); }
.form__status--error { color: #d63031; }

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 12px;
}

.contact__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  color: var(--color-text);
}

.contact__item svg {
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--color-primary);
}

.contact__item strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.contact__item a,
.contact__item span {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

.contact__item a:hover {
  color: var(--color-primary);
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-dark);
  padding: 40px 0;
}

.footer__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__brand {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-white);
}

.footer__copy {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ===================================================
   Responsive
   =================================================== */

@media (max-width: 900px) {
  .presentation__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .prestations__grid {
    grid-template-columns: 1fr;
  }

  .pourquoi__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer__content {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .nav__links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
  }

  .nav__links--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__toggle--active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
  }
  .nav__toggle--active span:nth-child(2) {
    opacity: 0;
  }
  .nav__toggle--active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
  }

  .section {
    padding: 72px 0;
  }

  .hero__subtitle br { display: none; }

  .card {
    padding: 28px 24px;
  }

  .presentation__stats {
    gap: 16px;
  }
}