/* ========================================
   Meridian Partners — Style principal
   ======================================== */

/* --- Design Tokens --- */
:root {
  /* Palette */
  --color-primary-900: #0B1D3A;
  --color-primary-700: #143564;
  --color-primary-500: #1E6091;
  --color-accent-400: #2EC4B6;
  --color-accent-300: #5DD9CD;
  --color-neutral-50: #F8FAFC;
  --color-neutral-100: #F1F5F9;
  --color-neutral-200: #E2E8F0;
  --color-neutral-600: #475569;
  --color-neutral-900: #0F172A;
  --color-whatsapp: #25D366;
  --color-whatsapp-hover: #1DA851;
  --color-white: #FFFFFF;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  --text-2xl: clamp(2rem, 1.5rem + 2vw, 3rem);
  --text-3xl: clamp(2.5rem, 1.75rem + 3vw, 4rem);

  /* Misc */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 200ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --navbar-height: 72px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-neutral-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  max-width: 65ch;
}

/* --- Utilities --- */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-4xl) 0;
  scroll-margin-top: var(--navbar-height);
}

.section--alt {
  background-color: var(--color-neutral-50);
}

.section--dark {
  background-color: var(--color-primary-900);
  color: var(--color-white);
}

.section--accent {
  background: linear-gradient(135deg, var(--color-accent-400), var(--color-primary-500));
  color: var(--color-white);
}

.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;
}

.text-center {
  text-align: center;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
  transform: translateY(0);
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-whatsapp {
  background-color: var(--color-whatsapp);
  color: var(--color-neutral-900);
}

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
  color: var(--color-neutral-900);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-white);
  color: var(--color-white);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-outline-dark {
  background: transparent;
  border: 2px solid var(--color-primary-700);
  color: var(--color-primary-700);
}

.btn-outline-dark:hover {
  background: var(--color-primary-700);
  color: var(--color-white);
}

/* --- Scroll Animations --- */
[data-animate] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-animate-delay="1"] { transition-delay: 0.1s; }
[data-animate-delay="2"] { transition-delay: 0.2s; }
[data-animate-delay="3"] { transition-delay: 0.3s; }
[data-animate-delay="4"] { transition-delay: 0.4s; }

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: background-color var(--transition-base), backdrop-filter var(--transition-base);
}

.navbar.scrolled {
  background-color: rgba(11, 29, 58, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

.navbar__logo img {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
}

.navbar__links {
  display: flex;
  gap: var(--space-xl);
}

.navbar__links a {
  color: var(--color-white);
  font-size: 0.9375rem;
  font-weight: 500;
  opacity: 0.85;
  transition: opacity var(--transition-fast);
}

.navbar__links a:hover {
  opacity: 1;
}

.navbar__cta {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

.burger {
  display: none;
  color: var(--color-white);
}

.burger svg {
  width: 28px;
  height: 28px;
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background-color: var(--color-primary-900);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu--open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
}

.mobile-menu__close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  color: var(--color-white);
}

.mobile-menu__close svg {
  width: 32px;
  height: 32px;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-900) 0%, var(--color-primary-700) 50%, var(--color-accent-400) 100%);
  overflow: hidden;
  padding: var(--space-4xl) 0;
}

.hero__shapes {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.hero__shapes circle,
.hero__shapes rect {
  opacity: 0.07;
  fill: var(--color-white);
}

.hero__shape-1 { animation: float-1 18s ease-in-out infinite; }
.hero__shape-2 { animation: float-2 22s ease-in-out infinite; }
.hero__shape-3 { animation: float-3 16s ease-in-out infinite; }
.hero__shape-4 { animation: float-4 20s ease-in-out infinite; }

@keyframes float-1 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(30px, -40px) rotate(10deg); }
}

@keyframes float-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-20px, 30px) scale(1.1); }
}

@keyframes float-3 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(40px, 20px) rotate(-15deg); }
}

@keyframes float-4 {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(-30px, -20px); }
  66% { transform: translate(20px, 30px); }
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  max-width: 800px;
  padding: 0 var(--space-lg);
}

.hero__title {
  margin-bottom: var(--space-lg);
}

.hero__subtitle {
  font-size: var(--text-lg);
  opacity: 0.9;
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__ctas {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.hero__keywords {
  font-size: 0.875rem;
  opacity: 0.6;
  letter-spacing: 0.05em;
  max-width: none;
}

/* --- Section Pourquoi --- */
.pourquoi__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

.pourquoi__item {
  text-align: center;
}

.pourquoi__icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent-400);
  margin: 0 auto var(--space-md);
}

.pourquoi__item h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.pourquoi__item p {
  color: var(--color-neutral-600);
  margin: 0 auto;
}

/* --- Section Comment ça marche --- */
.tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-neutral-600);
  background: var(--color-neutral-100);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.tab-btn[aria-selected="true"] {
  background-color: var(--color-primary-700);
  color: var(--color-white);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  max-width: 700px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.step__number {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 50%;
  background-color: var(--color-primary-700);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
}

.step h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.step p {
  color: var(--color-neutral-600);
}

/* --- Section Métiers --- */
.metiers__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.metier-card {
  background: var(--color-neutral-100);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.metier-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.metier-card__icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent-400);
  margin-bottom: var(--space-md);
}

.metier-card h3 {
  margin-bottom: var(--space-xs);
}

.metier-card__tagline {
  font-style: italic;
  color: var(--color-primary-500);
  margin-bottom: var(--space-md);
  font-size: 0.9375rem;
}

.metier-card p:last-child {
  color: var(--color-neutral-600);
}

/* --- CTA Mid / Final --- */
.cta-block {
  text-align: center;
  padding: var(--space-4xl) var(--space-lg);
}

.cta-block h2 {
  margin-bottom: var(--space-md);
}

.cta-block p {
  margin: 0 auto var(--space-xl);
  opacity: 0.9;
  max-width: 500px;
}

/* --- Section Entreprises --- */
.entreprises__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.entreprises__header h2 {
  margin-bottom: var(--space-md);
}

.entreprises__header p {
  color: var(--color-neutral-600);
  margin: 0 auto;
  max-width: 600px;
}

.entreprises__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.service-block {
  padding: var(--space-2xl);
  background: var(--color-neutral-100);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent-400);
}

.service-block__icon {
  width: 36px;
  height: 36px;
  color: var(--color-accent-400);
  margin-bottom: var(--space-md);
}

.service-block h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.service-block__subtitle {
  color: var(--color-primary-500);
  font-weight: 500;
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.service-block p:last-child {
  color: var(--color-neutral-600);
}

.entreprises__cta {
  text-align: center;
}

/* --- Section À propos --- */
.a-propos__text {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  font-size: var(--text-lg);
  color: var(--color-neutral-600);
  line-height: 1.8;
}

/* --- FAQ --- */
.faq__category {
  margin-bottom: var(--space-2xl);
}

.faq__category:last-child {
  margin-bottom: 0;
}

.faq__category-title {
  font-size: var(--text-lg);
  color: var(--color-primary-700);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-neutral-200);
}

.faq-item {
  border-bottom: 1px solid var(--color-neutral-200);
}

.faq-item__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) 0;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-neutral-900);
}

.faq-item__chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 250ms ease;
  color: var(--color-neutral-600);
}

.faq-item__question[aria-expanded="true"] .faq-item__chevron {
  transform: rotate(180deg);
}

.faq-item__answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 250ms ease;
}

.faq-item__answer.is-open {
  grid-template-rows: 1fr;
}

.faq-item__answer-inner {
  overflow: hidden;
}

.faq-item__answer-inner p {
  padding-bottom: var(--space-lg);
  color: var(--color-neutral-600);
  line-height: 1.7;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-primary-900);
  color: var(--color-white);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand img {
  height: 32px;
  margin-bottom: var(--space-md);
  filter: brightness(0) invert(1);
}

.footer__tagline {
  opacity: 0.7;
  font-size: 0.9375rem;
}

.footer__heading {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
  margin-bottom: var(--space-md);
}

.footer__link-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link-list a {
  opacity: 0.75;
  font-size: 0.9375rem;
  transition: opacity var(--transition-fast);
}

.footer__link-list a:hover {
  opacity: 1;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-xl);
  text-align: center;
  font-size: 0.8125rem;
  opacity: 0.5;
}

/* --- Responsive --- */

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

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

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

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

  .steps {
    gap: var(--space-xl);
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .burger {
    display: none !important;
  }

  .navbar__links {
    display: flex !important;
  }

  .pourquoi__grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .faq__columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3xl);
  }
}

/* Mobile-specific */
@media (max-width: 1023px) {
  .navbar__links {
    display: none;
  }

  .navbar__cta-desktop {
    display: none;
  }

  .burger {
    display: block;
  }
}

@media (max-width: 639px) {
  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }

  .hero__ctas .btn {
    width: 100%;
    justify-content: center;
    max-width: 300px;
  }

  .section {
    padding: var(--space-3xl) 0;
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
  }
}