/* ==========================================================================
   STYLES.CSS — REM Digital Solutions
   Reset + fondations + header + footer + composants communs
   Charge après variables.css sur toutes les pages.
   ========================================================================== */

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

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

body {
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeSpeed;
}

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

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

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

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

table {
  border-collapse: collapse;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: inherit;
  text-wrap: pretty;
}

p {
  text-wrap: pretty;
}

/* -------------------- Fondations -------------------- */
@font-face {
  font-family: 'Space Grotesk';
  src: local('Space Grotesk');
  font-display: swap;
}

@font-face {
  font-family: 'DM Sans';
  src: local('DM Sans');
  font-display: swap;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--color-text);
  background: var(--color-white);
  overflow-x: hidden;
}

a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--space-2xl);
}

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

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

.section--dark {
  background: var(--color-black);
  color: var(--color-text-inverse);
}

.section--gradient {
  background: var(--color-gradient);
  color: var(--color-text-inverse);
}

/* -------------------- Typography -------------------- */
.eyebrow {
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  display: block;
}

.heading-1,
.heading-2,
.heading-3 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.1;
}

.heading-1 { font-size: var(--fs-h1); margin-bottom: var(--space-md); }
.heading-2 { font-size: var(--fs-h2); margin-bottom: var(--space-lg); max-width: 640px; }
.heading-3 { font-size: var(--fs-h3); margin-bottom: var(--space-sm); }

.lead {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.6;
  color: var(--color-text-muted);
  max-width: 640px;
}

.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }

/* -------------------- Buttons (BEM: btn / btn--variant) -------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 16px;
  padding: 16px 28px;
  border-radius: var(--radius-pill);
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn--primary:hover {
  color: var(--color-text-inverse);
  background: var(--color-primary-dark);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(11, 11, 14, 0.2);
}

.btn--outline:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}

.btn--outline-inverse {
  background: transparent;
  color: var(--color-text-inverse);
  border: 1px solid var(--color-border-inverse);
}

.btn--outline-inverse:hover {
  color: var(--color-text-inverse);
  border-color: rgba(255, 255, 255, 0.6);
}

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

.btn--on-light:hover {
  color: var(--color-primary-dark);
}

/* -------------------- Grid helpers -------------------- */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid--auto-fit-220 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--auto-fit-260 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--auto-fit-320 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

/* -------------------- Cards -------------------- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.card--bordered {
  border: 1px solid var(--color-border);
}

/* -------------------- Reveal on scroll (état, piloté par main.js) -------------------- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* -------------------- JS behavior hooks (transitions only, no layout) -------------------- */
.js-tilt {
  transition: transform var(--transition-base);
  will-change: transform;
}

.js-magnetic {
  transition: transform 0.2s ease;
}

.js-parallax {
  will-change: transform;
}

/* -------------------- Skip link (accessibilité) -------------------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-black);
  color: var(--color-white);
  padding: 12px 20px;
  z-index: 1000;
}

.skip-link:focus {
  left: var(--space-sm);
  top: var(--space-sm);
}

/* -------------------- Focus visibility -------------------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   HEADER — glassmorphism + menu fullscreen overlay
   ========================================================================== */
.header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 4vw, 64px);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.72);
  border-bottom: 1px solid var(--color-border);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}

.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.header__logo-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  color: var(--color-text);
}

.header__logo-sub {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.header__nav {
  display: none;
  align-items: center;
  gap: 36px;
}

.header__nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-text);
}

.header__nav-link:hover {
  color: var(--color-primary);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header__toggle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(11, 11, 14, 0.15);
  background: var(--color-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: transform var(--transition-fast);
}

.header__toggle:hover {
  transform: scale(1.05);
}

.header__toggle-bar {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  display: block;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.header__toggle.is-active .header__toggle-bar:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.header__toggle.is-active .header__toggle-bar:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.menu-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-black);
  z-index: 300;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-inline: clamp(24px, 8vw, 96px);
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.menu-overlay__close {
  position: absolute;
  top: 20px;
  right: clamp(20px, 4vw, 64px);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--color-border-inverse);
  background: transparent;
  color: var(--color-white);
  font-size: 24px;
  line-height: 1;
}

.menu-overlay__nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.menu-overlay__link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(32px, 7vw, 64px);
  color: var(--color-white);
  padding-block: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 0;
  transform: translateY(24px);
}

.menu-overlay.is-open .menu-overlay__link {
  animation: menu-word-in 0.6s ease forwards;
}

.menu-overlay__link:nth-child(1) { animation-delay: 0s; }
.menu-overlay__link:nth-child(2) { animation-delay: 0.08s; }
.menu-overlay__link:nth-child(3) { animation-delay: 0.16s; }
.menu-overlay__link:nth-child(4) { animation-delay: 0.24s; }
.menu-overlay__link:nth-child(5) { animation-delay: 0.32s; }

.menu-overlay__socials {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}

.menu-overlay__social-link {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

.menu-overlay__social-link:hover {
  color: var(--color-white);
}

@keyframes menu-word-in {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .menu-overlay__link {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: var(--color-black);
  color: var(--color-text-inverse-muted);
  padding: var(--space-xl) var(--space-md) var(--space-md);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.footer__brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--space-sm);
}

.footer__brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--color-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}

.footer__brand-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  color: var(--color-white);
}

.footer__tagline {
  font-size: var(--fs-small);
  line-height: 1.6;
  max-width: 240px;
}

.footer__col-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-small);
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__link {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--fs-small);
}

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

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
  font-size: 13px;
}

.footer__socials {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer__social-link {
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
}

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

/* ==========================================================================
   CTA BANNER — bloc d'appel à l'action partagé (accueil / à propos / services)
   ========================================================================== */
.cta-banner {
  padding: 110px 24px;
  text-align: center;
}

.cta-banner__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.8rem, 5vw, 3rem);
  margin-bottom: var(--space-md);
}

.cta-banner__text {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin: 0 auto var(--space-lg);
}

.cta-banner__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}