/* ========================================
   VARIABLES
======================================== */

:root {
  --color-primary: #1B263B;
  --color-accent: #B08A4A;
  --color-white: #FFFFFF;
  --color-light: #F1F3F5;
  --color-border: #DDE2E6;
  --color-text: #1B263B;
  --color-muted: #6C757D;

  --container: 1280px;

  --radius: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,.05);
  --shadow-md: 0 10px 30px rgba(0,0,0,.08);
  --shadow-lg: 0 18px 50px rgba(0,0,0,.12);

  --transition: .3s ease;
}

/* ========================================
   RESET
======================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  color: var(--color-text);
  background: var(--color-white);

  line-height: 1.7;
}

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

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

ul {
  list-style: none;
}

/* ========================================
   TYPOGRAPHIE
======================================== */

h1,
h2,
h3,
h4 {
  font-weight: 750;
  line-height: 1.12;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 1.05;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
}

h3 {
  font-size: 1.35rem;
}

p {
  color: var(--color-muted);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;

  color: var(--color-accent);

  font-size: .82rem;
  font-weight: 800;

  text-transform: uppercase;
  letter-spacing: 2px;

  margin-bottom: 1rem;
}

.eyebrow::before {
  content: "";

  width: 28px;
  height: 2px;

  background: var(--color-accent);
  border-radius: 100px;
}

/* ========================================
   LAYOUT
======================================== */

.container {
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

.section {
  padding: 110px 0;
}

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

.section-dark {
  background: var(--color-primary);
  color: var(--color-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-white);
}

.section-dark p {
  color: rgba(255,255,255,.76);
}

.section-dark .eyebrow {
  color: var(--color-accent);
}

.split {
  display: grid;
  gap: 70px;

  grid-template-columns: 1fr 1fr;

  align-items: center;
}

.cards-grid {
  display: grid;
  gap: 30px;

  grid-template-columns:
    repeat(auto-fit, minmax(280px, 1fr));

  margin-top: 60px;
}

/* ========================================
   HEADER
======================================== */

.site-header {
  position: sticky;
  top: 0;

  z-index: 1000;

  background: rgba(255,255,255,.95);

  backdrop-filter: blur(10px);

  border-bottom: 1px solid var(--color-border);
}

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

  min-height: 90px;
}

.nav-logo img {
  height: 55px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-menu a {
  font-weight: 600;
  transition: var(--transition);
}

.nav-menu a:hover {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
}

/* ========================================
   HERO
======================================== */

.hero {
  padding: 140px 0 120px;
}

.hero h1 {
  max-width: 980px;
}

.hero-subtitle {
  font-size: clamp(1.08rem, 1.6vw, 1.28rem);
  margin-top: 28px;
  max-width: 780px;
}

.hero-grid {
  display: grid;
  gap: 70px;

  grid-template-columns: 1.4fr .8fr;

  align-items: center;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;

  margin-top: 35px;
}

.hero-points span {
  background: var(--color-light);

  padding: 10px 18px;

  border-radius: 100px;

  color: var(--color-primary);
  font-size: .9rem;
  font-weight: 700;
}

.hero-card {
  background: var(--color-white);

  padding: 42px;

  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-lg);

  box-shadow: var(--shadow-lg);
}

.hero-card h2 {
  font-size: 1.7rem;
  margin-bottom: 15px;
}

.hero-card p {
  margin-bottom: 25px;
}

/* ========================================
   BENEFITS
======================================== */

.benefits-list {
  display: flex;
  flex-direction: column;
  gap: 35px;
}

.benefits-list h3 {
  margin-bottom: 10px;
}

/* ========================================
   CTA
======================================== */

.cta-section {
  padding-bottom: 110px;
}

.cta-box {
  background:
    linear-gradient(
      135deg,
      #1B263B 0%,
      #101A2A 100%
    );

  color: var(--color-white);

  padding: 82px;

  border-radius: var(--radius-lg);

  text-align: center;

  box-shadow: var(--shadow-lg);
}

.cta-box h2 {
  color: var(--color-white);
  margin-bottom: 20px;
}

.cta-box h2::after {
  margin-inline: auto;
}

.cta-box p {
  color: rgba(255,255,255,.8);

  max-width: 750px;

  margin: 0 auto;
}

.cta-box .eyebrow {
  color: var(--color-accent);
}

.cta-box .card {
  background: var(--color-white);
}

.cta-box .card h3 {
  color: var(--color-primary);
}

/* ========================================
   TITRES PREMIUM
======================================== */

.section > .container > h2::after,
.split h2::after,
.cta-box h2::after {
  content: "";

  display: block;

  width: 76px;
  height: 3px;

  margin-top: 20px;

  background: var(--color-accent);

  border-radius: 20px;
}

/* ========================================
   CALCULATEUR / FORM LAYOUT
======================================== */

.calculator-grid {
  display: grid;
  gap: 40px;

  grid-template-columns:
    minmax(0, 1.3fr)
    minmax(320px, .7fr);

  align-items: start;
}

/* ========================================
   FOOTER
======================================== */

.site-footer {
  background: var(--color-primary);
  color: var(--color-white);

  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  gap: 50px;

  grid-template-columns:
    2fr
    1fr
    1fr
    1.2fr;
}

.footer-logo {
  height: 60px;
  width: auto;

  margin-bottom: 20px;
}

.site-footer p,
.site-footer a {
  color: rgba(255,255,255,.8);
}

.site-footer h3 {
  color: var(--color-white);
  margin-bottom: 15px;
}

.footer-nav ul,
.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li,
.footer-links li {
  margin-bottom: 10px;
}

.footer-nav a,
.footer-links a,
.footer-contact a {
  color: rgba(255,255,255,.8);
  text-decoration: none;
}

.footer-nav a:hover,
.footer-links a:hover,
.footer-contact a:hover {
  color: var(--color-accent);
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.15);

  margin-top: 50px;
  padding: 25px 0;

  text-align: center;
}

.footer-bottom p {
  color: rgba(255,255,255,.65);
}

/* ========================================
   RESPONSIVE
======================================== */

@media (max-width: 992px) {

  .hero-grid,
  .split,
  .footer-grid,
  .calculator-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 90px 0;
  }

  .section {
    padding: 80px 0;
  }

  .cta-box {
    padding: 50px 30px;
  }

  .nav-menu {
    position: absolute;

    top: 90px;
    left: 0;
    right: 0;

    display: none;
    flex-direction: column;
    gap: 20px;

    padding: 30px;

    background: var(--color-white);

    border-bottom: 1px solid var(--color-border);

    box-shadow: var(--shadow-md);
  }

  .nav-menu.active {
    display: flex;
    z-index: 1001;
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;

    background: none;
    border: none;

    cursor: pointer;
  }

  .nav-toggle span {
    width: 28px;
    height: 2px;

    background: var(--color-primary);
  }

}

@media (max-width: 768px) {

  .container {
    width: min(100% - 28px, var(--container));
  }

  h1 {
    font-size: clamp(2.4rem, 11vw, 3.5rem);
  }

  h2 {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
  }

  .cta-box {
    border-radius: var(--radius);
  }

  .eyebrow {
    letter-spacing: 1.4px;
  }

}