/* ==============================
   🌗 Thème sombre / clair moderne
   ============================== */

/* ===== Thème sombre (par défaut) ===== */
:root {
  --bg: #121212;
  --bg-alt: #1b1b1b;
  --bg-card: rgba(28, 28, 28, 0.85);
  --accent: #d4b483;
  --accent-hover: #e7c58b;
  --text: #f5f5f5;
  --text-muted: #aaa;
  /* Radius & shadows */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 5px 15px rgba(0,0,0,0.08);
  --shadow-md: 0 15px 40px rgba(0,0,0,0.12);
  --shadow-lg: 0 30px 80px rgba(0,0,0,0.18);

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s var(--ease);
  --transition: 0.4s var(--ease);
  --transition-slow: 0.7s var(--ease);
}

/* ===== Thème clair (activé avec la classe .dark désactivée) ===== */
:root:not(.dark) {
  --bg: #f7f7f7;
  --bg-alt: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --accent: #b8860b;
  --accent-hover: #d49e1e;
  --text: #222;
  --text-muted: #555;
}


/* ==============================
   Base
   ============================== */
body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: var(--transition);
}

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

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

header {
  --header-bg: rgba(27, 27, 27, 0.8);
  --header-text: #f5f5f5;
  --header-accent: #d4b483;
  --header-accent-hover: #e7c58b;
}

:root:not(.dark) header {
  --header-bg: rgba(255, 255, 255, 0.8);
  --header-text: #222;
  --header-accent: #d4b483;
  --header-accent-hover: #e7c58b;
}

html {
  scroll-behavior: smooth;
}

section {
  scroll-margin-top: 80px; /* hauteur du header */
}

/* ==============================
   Header / Navigation
   ============================== */

.header {
  position: sticky;
  top: 0;
  z-index: 1000;

  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 1rem 2rem;
  background-color: var(--header-bg);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

/* ==============================
   Header Shrink Effect
   ============================== */
.header {
  transition: all 0.3s ease;
}
.header.shrink {
  padding: 0.5rem 2rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.header.shrink .logo a {
  font-size: 1.2rem;
}

.header.shrink #theme-toggle {
  transform: scale(0.9);
}

/* Logo */
.logo a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--header-accent);
  text-decoration: none;
}

/* Nav container */
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* Links */
.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--header-text);
  text-decoration: none;
  position: relative;
  font-weight: 500;
  transition: color 0.3s ease;
}

/* Hover & active underline animation */
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0%;
  height: 2px;
  background-color: #007bff;
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #007bff;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Theme button */
#theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  transition: transform 0.2s ease;
}

#theme-toggle:hover {
  transform: scale(1.2);
}

/* ==============================
   Hero Section
   ============================== */
.hero {
  text-align: center;
  padding: 10em 2em;
  max-width: 800px;
  margin: auto;
  animation: fadeIn 1s ease-in-out;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 0.5em;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.hero-buttons {
  margin-top: 2.5em;
}

.btn {
  background-color: var(--accent);
  color: var(--bg);
  padding: 0.9em 1.8em;
  border-radius: var(--radius);
  margin: 0 0.5em;
  display: inline-block;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.btn:hover {
  background-color: var(--bg);
  transform: translateY(-3px);
  border: 2px solid var(--accent);
}

.btn-outline {
  border: 2px solid var(--accent);
  background: none;
  color: var(--accent);
}

.btn-outline:hover {
  background-color: var(--accent);
  color: var(--bg);
}

/* ==============================
   Portfolio
   ============================== */
.portfolio {
  padding: 6em 2em;
  max-width: 1000px;
  margin: auto;
  text-align: center;
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5em;
  margin-top: 3em;
}

.project-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1.8em;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  backdrop-filter: blur(6px);
}

.project-card:hover {
  transform: translateY(-5px);
  background: var(--bg-alt);
}

@media (prefers-color-scheme: light) {
  .project-card:hover {
    background: rgba(255, 255, 255, 0.95);
  }
}

.project-card img {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 1em;
}

/* ==============================
   Contact
   ============================== */
.contact {
  text-align: center;
  padding: 6em 2em;
  max-width: 600px;
  margin: auto;
}

.contact h3 {
  margin-bottom: 1.5em;
  font-size: 1.8rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.9em;
  margin-bottom: 1em;
  border: none;
  border-radius: var(--radius);
  background-color: var(--bg-alt);
  color: var(--text);
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
}

.contact-form button:hover {
  background: var(--accent-hover);
  border: 2px solid var(--accent);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--accent);
  background-color: #1f1f1f;
}

@media (prefers-color-scheme: light) {
  .contact-form input:focus,
  .contact-form textarea:focus {
    background-color: #fafafa;
  }
}

/* ==============================
   Footer
   ============================== */
footer {
  background-color: var(--bg-alt);
  text-align: center;
  padding: 2em;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-top: 1px solid #2c2c2c;
  transition: var(--transition);
}

footer a {
  color: var(--accent);
  margin-left: 0.5em;
}

/* ==============================
   Legal
   ============================== */
.legal {
  padding: 4em 2em;
  max-width: 800px;
  margin: auto;
  text-align: justify;
}

/* ==============================
   Animations
   ============================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==============================
   Responsive
   ============================== */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 1em;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 6em 1.5em;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .projects {
    grid-template-columns: 1fr;
  }
}

/* ==============================
   🌗 Bascule de thème
   ============================== */
#theme-toggle {
  background: none;
  border: 2px solid var(--accent);
  color: var(--accent);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

#theme-toggle:hover {
  background-color: var(--accent);
  color: var(--bg);
  transform: rotate(15deg);
}

/* Transition douce pour tout le site lors du changement de thème */
body, header, footer, .project-card, .btn {
  transition: background-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
}