/**
 * ACTIV FITNESS - Site statique recruteur
 * Design system premium, sans framework
 * Contraintes: statique, AA contrast, 60fps, responsive 360-1440px
 * Hooks: remplacer placeholders images dans HTML
 */

@font-face {
  font-family: 'Astrid';
  src: url('../assets/fonts/Astrid.woff') format('woff');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* === TOKENS === */
:root {
  --bg: #0E0F12;
  --surface: #151821;
  --text: #F2F5F9;
  --muted: #9AA4B2;
  --accent: #00B1E1;
  --accent-2: #3CE6B0;
  --warning: #FFC857;
  
  --radius: 12px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.15);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.25);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.35);
  
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --font-stack: system-ui, -apple-system, 'Segoe UI', sans-serif;
  
  --container: 1200px;
  --gutter: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Astrid', var(--font-stack);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover, a:focus {
  color: var(--accent-2);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

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

/* === UTILITIES === */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: 80px 0;
}

@media (max-width: 768px) {
  .section {
    padding: 48px 0;
  }
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
}

@media (max-width: 768px) {
  .grid-12 {
    grid-template-columns: 1fr;
  }
}

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

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.25rem;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .lead {
    font-size: 1.125rem;
  }
}

/* === COMPONENTS === */

/* CTA Button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: var(--bg);
  box-shadow: var(--shadow-md);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 100%);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn--primary:hover::before,
.btn--primary:focus::before {
  opacity: 1;
}

.btn--primary span {
  position: relative;
  z-index: 1;
}

.btn--secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid rgba(242, 245, 249, 0.1);
}

.btn--secondary:hover,
.btn--secondary:focus {
  background: rgba(242, 245, 249, 0.05);
  border-color: var(--accent);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* Card */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid rgba(242, 245, 249, 0.05);
}

.card:hover,
.card:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 177, 225, 0.2);
}

@media (max-width: 768px) {
  .card {
    padding: 24px;
  }
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: 8px;
  margin-bottom: 16px;
}

.card__title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.card__text {
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0, 177, 225, 0.1);
  border: 1px solid rgba(0, 177, 225, 0.3);
  border-radius: 24px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
}

.badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* === SECTIONS === */

/* Header/Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 15, 18, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(242, 245, 249, 0.05);
  padding: 16px 0;
}

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

.nav__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

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

@media (max-width: 768px) {
  .nav__links {
    gap: 16px;
    font-size: 0.875rem;
  }
}

.nav__link {
  color: var(--muted);
  font-weight: 500;
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link:focus {
  color: var(--text);
}

/* Hero */
.hero {
  padding: 120px 0 80px;
  position: relative;
}

@media (max-width: 768px) {
  .hero {
    padding: 80px 0 48px;
  }
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

@media (max-width: 768px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.hero__content h1 {
  margin-bottom: 24px;
}

.hero__content .lead {
  margin-bottom: 32px;
}

.hero__image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/5;
  box-shadow: var(--shadow-lg);
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Skills Grid */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

@media (max-width: 768px) {
  .skills {
    grid-template-columns: 1fr;
  }
}

/* Projects */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

@media (max-width: 768px) {
  .projects {
    grid-template-columns: 1fr;
  }
}

.project__metrics {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(242, 245, 249, 0.1);
  font-weight: 600;
  color: var(--accent-2);
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

@media (max-width: 768px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
}

.gallery__item {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  background: var(--surface);
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.gallery__item:hover img,
.gallery__item:focus img {
  transform: scale(1.05);
}

.gallery__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(to top, rgba(14, 15, 18, 0.95), transparent);
  font-size: 0.875rem;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery__item:hover .gallery__caption,
.gallery__item:focus .gallery__caption {
  opacity: 1;
}

/* Testimonials */
.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

@media (max-width: 768px) {
  .testimonials {
    grid-template-columns: 1fr;
  }
}

.testimonial {
  background: var(--surface);
  padding: 32px;
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow-sm);
}

.testimonial__quote {
  font-size: 1.125rem;
  font-style: italic;
  margin-bottom: 16px;
  line-height: 1.6;
}

.testimonial__author {
  font-size: 0.875rem;
  color: var(--muted);
  font-weight: 600;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 48px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2));
}

.timeline__item {
  position: relative;
  margin-bottom: 32px;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -54px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--bg);
}

.timeline__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline__content {
  color: var(--muted);
  font-size: 0.9375rem;
}

/* Contact */
.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

.contact__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid rgba(242, 245, 249, 0.1);
  transition: all var(--transition);
  font-weight: 500;
}

.contact__link:hover,
.contact__link:focus {
  background: rgba(0, 177, 225, 0.1);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* Footer */
.footer {
  padding: 48px 0;
  border-top: 1px solid rgba(242, 245, 249, 0.05);
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

/* Video Container */
.video-container {
  position: relative;
  aspect-ratio: 16/9;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--surface);
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Action Cards */
.action-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.action-card {
  background: var(--surface);
  padding: 32px;
  border-radius: var(--radius);
  text-align: center;
  border: 2px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
}

.action-card:hover,
.action-card:focus-within {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.action-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.action-card__title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

/* Form */
.form {
  max-width: 600px;
  margin: 0 auto;
}

.form__group {
  margin-bottom: 24px;
}

.form__label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.9375rem;
}

.form__input,
.form__textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid rgba(242, 245, 249, 0.1);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 177, 225, 0.1);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__success {
  padding: 16px;
  background: rgba(60, 230, 176, 0.1);
  border: 1px solid var(--accent-2);
  border-radius: 8px;
  color: var(--accent-2);
  text-align: center;
  margin-top: 16px;
}

.honeypot {
  position: absolute;
  left: -9999px;
}

/* === ANIMATIONS === */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Gradient animation sur CTA */
@keyframes gradient-shift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent));
  background-size: 200% 200%;
  animation: gradient-shift 8s ease infinite;
}

/* === ACCESSIBILITY === */
@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;
  }
  
  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* Focus visible modern */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* === RESPONSIVE === */
@media (max-width: 360px) {
  :root {
    font-size: 14px;
  }
  
  .section {
    padding: 32px 0;
  }
}