/* ============================================
   VARIABLES & RESET
   ============================================ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);

  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-muted: #55556a;

  --accent: #6c63ff;
  --accent-light: #8b83ff;
  --accent-gradient: linear-gradient(135deg, #6c63ff 0%, #b14aed 100%);

  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 20px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', sans-serif;

  --nav-height: 72px;
  --container-width: 1100px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(24px, 5vw, 48px);
  z-index: 1000;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  background: rgba(10, 10, 15, 0.92);
}

.nav-logo {
  display: flex;
  align-items: center;
  padding: 6px 14px;
  background: rgba(235, 235, 242, 0.96);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-logo:hover {
  background: #f0f0f8;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
}

.nav-logo-img {
  height: 38px;
  width: auto;
  display: block;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

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

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.3;
}

.hero-glow--1 {
  width: 500px;
  height: 500px;
  background: var(--accent);
  top: -10%;
  right: -5%;
}

.hero-glow--2 {
  width: 400px;
  height: 400px;
  background: #b14aed;
  bottom: -10%;
  left: -5%;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 24px;
}

.hero-greeting {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--accent-light);
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 4vw, 2.2rem);
  font-weight: 600;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-dot {
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(12px); opacity: 0.3; }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-base), background var(--transition-base);
}

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

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 24px rgba(108, 99, 255, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 8px 32px rgba(108, 99, 255, 0.4);
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent);
}

.btn-icon {
  width: 18px;
  height: 18px;
}

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 16px;
  font-size: 1rem;
}

/* ============================================
   SECTIONS
   ============================================ */

.section {
  padding: 120px 0;
  position: relative;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.section-number {
  color: var(--accent);
  font-size: 0.75em;
  margin-right: 8px;
}

.section-description {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 48px;
  max-width: 550px;
}

/* ============================================
   TIMELINE (À PROPOS)
   ============================================ */

.timeline {
  position: relative;
  padding-left: 40px;
  margin-top: 48px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
  padding-left: 20px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -40px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 4px var(--bg-primary);
}

.timeline-year {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--accent-light);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ============================================
   PROJECTS
   ============================================ */

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

.project-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-slow), border-color var(--transition-base), box-shadow var(--transition-base);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(108, 99, 255, 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px rgba(108, 99, 255, 0.08);
}

.project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--bg-secondary);
}

.project-image-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(108, 99, 255, 0.08) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-image-placeholder svg {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
}

.project-body {
  padding: 24px;
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.project-tag {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-light);
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid rgba(108, 99, 255, 0.15);
  border-radius: 50px;
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.project-link:hover {
  color: var(--accent-light);
}

.project-link svg {
  width: 16px;
  height: 16px;
}

/* ============================================
   SKILLS
   ============================================ */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.skill-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: transform var(--transition-slow), border-color var(--transition-base), box-shadow var(--transition-base);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 99, 255, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.skill-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.skill-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.skill-name {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.skill-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 2px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.skill-category {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ============================================
   CONTACT
   ============================================ */

.contact-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  margin-top: 48px;
}

.contact-form {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  position: relative;
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 16px 18px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.03);
}

.form-group label {
  position: absolute;
  left: 18px;
  top: 16px;
  font-size: 0.95rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: all var(--transition-fast);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -8px;
  left: 14px;
  font-size: 0.75rem;
  color: var(--accent-light);
  background: var(--bg-primary);
  padding: 0 6px;
}

.btn-submit {
  grid-column: 1 / -1;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.form-feedback {
  grid-column: 1 / -1;
  margin: 0;
  min-height: 1.5em;
  font-size: 0.9rem;
}

.form-feedback:empty {
  display: none;
}

.form-feedback--ok {
  color: #7dd3a8;
}

.form-feedback--err {
  color: #f0a0a8;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(108, 99, 255, 0.1);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.contact-card-icon svg {
  width: 22px;
  height: 22px;
  color: var(--accent-light);
}

.contact-card h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 2px;
}

.contact-card p {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.contact-tel {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-tel:hover {
  color: var(--accent-light);
}

.social-link {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
  transform: translateY(-2px);
}

.social-link svg {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.social-link:hover svg {
  color: var(--accent-light);
}

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

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============================================
   RESPONSIVE — TABLET (max 900px)
   ============================================ */

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

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

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

/* ============================================
   RESPONSIVE — MOBILE (max 640px)
   ============================================ */

@media (max-width: 640px) {
  :root {
    --nav-height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 32px;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    gap: 4px;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-link {
    font-size: 1.05rem;
    padding: 12px 16px;
    width: 100%;
  }

  .section {
    padding: 80px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
    max-width: 280px;
  }

  .timeline {
    padding-left: 32px;
  }
}

/* ============================================
   RESPONSIVE — SMALL MOBILE (max 380px)
   ============================================ */

@media (max-width: 380px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 16px;
  }
}