/* ======================
   Header / Navbar
====================== */

.header {
  position: fixed;
  width: 100%;
  top: 0;
  background: rgba(0, 0, 0, 0.6); /* Night default */
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: background 0.3s ease;
}

body.day-mode .header {
  background: rgba(245, 245, 247, 0.8); /* Day */
}

.nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  padding: 15px 0;
}

/* Logo */
.logo {
  font-weight: 700;
  font-size: 22px;
}
.logo span {
  color: var(--primary-color-night);
}

body.day-mode .logo span {
  color: var(--primary-color-day);
}

/* ======================
   Desktop Nav Links
====================== */
nav a {
  margin: 0 12px;
  color: var(--text-color-night);
  text-decoration: none;
  position: relative;

  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  transition: all 0.3s ease;
}

body.day-mode nav a {
  color: var(--text-color-day);
}

/* Hover effect */
nav a::after {
  content: "";
  height: 2px;
  width: 0;
  background: var(--primary-color-night);
  position: absolute;
  left: 0;
  bottom: -4px;
  transition: 0.3s;
}

body.day-mode nav a::after {
  background: var(--primary-color-day);
}

nav a:hover::after {
  width: 100%;
}

nav a:hover {
  color: var(--secondary-color-night);
}

body.day-mode nav a:hover {
  color: var(--secondary-color-day);
}

/* Contact Button */
nav a.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-color-night);
  color: var(--text-color-night);
  padding: 10px 18px;
  border-radius: 30px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
}

body.day-mode nav a.btn {
  background: var(--primary-color-day);
  color: var(--text-color-day);
}

nav a.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255,255,255,0.2);
}

body.day-mode nav a.btn:hover {
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

/* ======================
   Menu Toggle - Mobile
====================== */
.menu-toggle {
  display: none;
  font-size: 28px;
  color: var(--text-color-night);
  cursor: pointer;
  transition: 0.3s;
}

body.day-mode .menu-toggle {
  color: var(--text-color-day);
}

.menu-toggle:hover {
  color: var(--primary-color-night);
}

body.day-mode .menu-toggle:hover {
  color: var(--primary-color-day);
}

/* ======================
   Mobile Menu
====================== */
@media (max-width: 768px) {

  .menu-toggle {
    display: block;
  }

  nav {
    position: fixed;
    top: 70px;
    right: -100%;
    width: 250px;
    height: calc(100vh - 70px);
    background: rgba(18, 18, 30, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    padding: 25px;
    gap: 18px;
    transition: 0.4s;
    border-left: 1px solid rgba(108,92,231,0.2);
    z-index: 999;
  }

  body.day-mode nav {
    background: rgba(245, 245, 247, 0.95);
    border-left: 1px solid rgba(230,46,113,0.2);
  }

  nav.active {
    right: 0;
  }

  nav a {
    font-size: 16px;
    padding: 12px 15px;
    background: rgba(108,92,231,0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: 0.3s;
  }

  body.day-mode nav a {
    background: rgba(230,46,113,0.1);
  }

  nav a:hover {
    background: rgba(108,92,231,0.25);
    transform: translateX(5px);
  }

  body.day-mode nav a:hover {
    background: rgba(230,46,113,0.25);
  }

  nav a.btn {
    background: var(--primary-color-night);
    color: var(--text-color-night);
  }

  body.day-mode nav a.btn {
    background: var(--primary-color-day);
    color: var(--text-color-day);
  }
}