:root {
  /* Light Mode Palette (Premium & Clean) */
  --bg: #f8fafc;
  --text-main: #0f172a;
  --text-sub: #475569;
  --accent: #2563eb;
  --accent-glow: rgba(37, 99, 235, 0.2);
  --section-bg: #ffffff;
  --card-bg: #f1f5f9;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
}

body.dark {
  /* Dark Mode Palette (Cyber & Deep) */
  --bg: #030712;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --accent: #0ea5e9;
  --accent-glow: rgba(14, 165, 233, 0.3);
  --section-bg: #111827;
  --card-bg: #1f2937;
  --nav-bg: rgba(3, 7, 18, 0.8);
  --border: #374151;
  --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(17, 24, 39, 0.75);
  --glass-border: rgba(255, 255, 255, 0.05);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Outfit', sans-serif;
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  transition: background-color 0.5s cubic-bezier(0.4, 0, 0.2, 1), color 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-x: hidden;
}

/* Glassmorphism Header */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.25rem 0;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
}

nav h1 {
  display: none;
}

.nav-links {
  display: flex;
  gap: 1rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-sub);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-glow);
}

.theme-toggle {
  position: absolute;
  right: 2.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  width: 44px;
  height: 44px;
  border-radius: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

.theme-toggle:hover {
  transform: scale(1.05);
  border-color: var(--accent);
}

/* Hero Section */
.accueil {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  text-align: center;
  width: 100%;
  /* Ensure full width for centering */
  background: radial-gradient(circle at top right, var(--accent-glow), transparent 40%),
    radial-gradient(circle at bottom left, var(--accent-glow), transparent 40%);
}

.avatar-large {
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, var(--accent), #4f46e5);
  color: white;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 2.5rem;
  box-shadow: 0 20px 40px var(--accent-glow);
  animation: morphing 8s ease-in-out infinite;
}

@keyframes morphing {
  0% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }

  50% {
    border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
  }

  100% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
}

.accueil h1 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
  line-height: 1;
  background: linear-gradient(to right, var(--text-main), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.accroche {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1.5rem;
  min-height: 1.2em;
}

.subtitle {
  color: var(--text-sub);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 3rem;
  margin-left: auto;
  margin-right: auto;
}

.btn-main {
  padding: 1.2rem 3rem;
  background: var(--accent);
  color: white;
  text-decoration: none;
  font-weight: 700;
  border-radius: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 10px 30px var(--accent-glow);
}

.btn-main:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px var(--accent-glow);
  background: #2563eb;
}

/* Sections */
.section {
  padding: 8rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 4rem;
  text-align: center;
  letter-spacing: -0.02em;
}

/* Project Grid */
.projects-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
  justify-content: center;
  /* Ensure centering when few items */
}

.project-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 1.5rem;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
  box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.1);
}

.project-card .project-image-wrapper {
  width: 100%;
  height: 220px;
  overflow: hidden;
  border-radius: 16px;
  margin-bottom: 1.5rem;
  background: var(--card-bg);
}

.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.project-card:hover img {
  transform: scale(1.05);
  /* Softer zoom */
}

/* Skills Layout (Enhanced Chips) */
.skill-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  /* Closer gap for chips */
  margin-bottom: 4rem;
}

.icon-label {
  display: flex;
  flex-direction: row;
  /* Horizontal layout */
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background: var(--card-bg);
  /* Use card bg */
  border-radius: 100px;
  /* Pill shape */
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  font-weight: 600;
  font-size: 0.9rem;
}

.icon-label:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  background: var(--section-bg);
  box-shadow: 0 4px 12px var(--accent-glow);
}

.icon-label img {
  width: 24px;
  /* Smaller icon */
  height: 24px;
}

.icon-label span {
  font-size: 0.9rem;
  color: var(--text-main);
  text-transform: none;
  /* Normal case */
  letter-spacing: normal;
}

/* Timeline (Vertical Line Design) */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 2rem;
  border-left: 2px solid var(--border);
}

.timeline-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
}

.timeline-card::before {
  content: '';
  position: absolute;
  left: -2.6rem;
  /* Align with border line */
  top: 2rem;
  width: 1rem;
  height: 1rem;
  background: var(--accent);
  border: 4px solid var(--bg);
  /* create a ring effect */
  border-radius: 50%;
  z-index: 1;
}

.timeline-card:hover {
  transform: translateX(5px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.timeline-card .date {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  display: block;
}

/* Contact Form */
.contact-form {
  max-width: 700px;
  margin: 0 auto;
  background: var(--section-bg);
  padding: 3rem;
  border-radius: 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.contact-form button {
  width: 100%;
  padding: 1.25rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 18px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
}

.contact-form button:hover {
  transform: scale(1.02);
  filter: brightness(1.1);
}

/* Footer */
footer {
  padding: 6rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-sub);
  font-weight: 500;
}

/* Utility */
.typed-text {
  color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {

  .accueil h1 {
    font-size: 3rem;
  }

  .section {
    padding: 4rem 1.5rem;
  }

  .contact-form {
    padding: 2rem;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  nav {
    padding: 1rem;
    justify-content: space-between;
    /* Remove backdrop-filter to prevent containing block issue for fixed children */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-links {
    display: flex;
    /* Ensure visibility */
    position: fixed;
    top: 55px !important;
    /* Below the glass header */
    bottom: auto !important;
    left: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    /* Changed from top to bottom */
    border-top: none;
    padding: 1rem;
    justify-content: center;
    z-index: 999;
  }

  /* Make main content allow for top nav */
  body {
    padding-bottom: 0;
    padding-top: 80px;
  }

  .theme-toggle {
    position: static;
    margin-right: 0;
  }

  .accueil h1 {
    font-size: 2.5rem;
  }

  .projects-cards,
  .timeline,
  .skill-row {
    grid-template-columns: 1fr;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .timeline-card,
  .project-card {
    width: 100%;
    max-width: 400px;
  }

  .nav-links a {
    font-size: 0.8rem;
    padding: 0.5rem;
  }
}