/*
 * CIRCULAR REVEAL OVERLAY MENU
 * Premium fullscreen navigation for studio websites
 */

/* ===== MENU BUTTON (RECHTS BOVEN) ===== */
.menu-toggle {
  position: fixed;
  top: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  z-index: 10001;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
  will-change: transform;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.8) translateY(-20px);
}

/* Show button when scrolled */
.menu-toggle.visible {
  opacity: 1;
  pointer-events: all;
  transform: scale(1) translateY(0);
}

.menu-toggle.visible:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(37, 99, 235, 0.5);
}

/* Hamburger Icon */
.menu-toggle-icon {
  width: 24px;
  height: 18px;
  position: relative;
  transform: rotate(0deg);
  transition: 0.3s ease-in-out;
}

.menu-toggle-icon span {
  display: block;
  position: absolute;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
  opacity: 1;
  left: 0;
  transform: rotate(0deg);
  transition: 0.25s ease-in-out;
}

.menu-toggle-icon span:nth-child(1) {
  top: 0px;
}

.menu-toggle-icon span:nth-child(2),
.menu-toggle-icon span:nth-child(3) {
  top: 8px;
}

.menu-toggle-icon span:nth-child(4) {
  top: 16px;
}

/* Active state - transform to X */
.menu-active .menu-toggle-icon span:nth-child(1),
.menu-active .menu-toggle-icon span:nth-child(4) {
  top: 8px;
  width: 0%;
  left: 50%;
}

.menu-active .menu-toggle-icon span:nth-child(2) {
  transform: rotate(45deg);
}

.menu-active .menu-toggle-icon span:nth-child(3) {
  transform: rotate(-45deg);
}

.menu-active .menu-toggle {
  background: #fff;
}

.menu-active .menu-toggle-icon span {
  background: #1a1a1a;
}

/* ===== HORIZONTAL DROPDOWN MENU ===== */
.circular-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  z-index: 10000;
  padding: 6rem 2rem 2rem;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.5s cubic-bezier(0.77, 0, 0.175, 1),
              opacity 0.5s ease;
  will-change: transform;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.circular-overlay.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

/* Background Pattern */
.circular-overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(37, 99, 235, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
  opacity: 0;
  animation: patternFade 0.6s 0.4s forwards;
}

@keyframes patternFade {
  to { opacity: 1; }
}

/* ===== OVERLAY MENU CONTENT ===== */
.overlay-menu {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.overlay-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 3rem;
  justify-content: center;
}

.overlay-nav-item {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.circular-overlay.active .overlay-nav-item {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animation delays */
.circular-overlay.active .overlay-nav-item:nth-child(1) { transition-delay: 0.1s; }
.circular-overlay.active .overlay-nav-item:nth-child(2) { transition-delay: 0.15s; }
.circular-overlay.active .overlay-nav-item:nth-child(3) { transition-delay: 0.2s; }
.circular-overlay.active .overlay-nav-item:nth-child(4) { transition-delay: 0.25s; }
.circular-overlay.active .overlay-nav-item:nth-child(5) { transition-delay: 0.3s; }
.circular-overlay.active .overlay-nav-item:nth-child(6) { transition-delay: 0.35s; }
.circular-overlay.active .overlay-nav-item:nth-child(7) { transition-delay: 0.4s; }
.circular-overlay.active .overlay-nav-item:nth-child(8) { transition-delay: 0.45s; }
.circular-overlay.active .overlay-nav-item:nth-child(9) { transition-delay: 0.5s; }

.overlay-nav-link {
  display: inline-block;
  font-family: 'DM Sans', sans-serif;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.01em;
  padding: 0.75rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  border-radius: 8px;
}

.overlay-nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #2563eb 0%, #7c3aed 100%);
  transform: scaleX(0);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.overlay-nav-link:hover {
  color: #2563eb;
  background: rgba(37, 99, 235, 0.1);
}

.overlay-nav-link:hover::before {
  transform: scaleX(1);
}

/* Link number indicator */
.overlay-nav-link .link-number {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 500;
  color: #64748b;
  margin-right: 0.5rem;
  transition: color 0.3s ease;
}

.overlay-nav-link:hover .link-number {
  color: #7c3aed;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .menu-toggle {
    top: 1.5rem;
    right: 1.5rem;
    width: 50px;
    height: 50px;
  }

  .circular-overlay {
    padding: 5rem 1.5rem 1.5rem;
  }

  .overlay-nav {
    flex-direction: column;
    gap: 0.5rem;
    align-items: stretch;
  }

  .overlay-nav-link {
    font-size: 1.1rem;
    padding: 1rem 1.5rem;
    text-align: center;
  }

  .overlay-nav-link .link-number {
    display: inline;
    margin-right: 0.5rem;
  }
}

/* ===== ACCESSIBILITY ===== */
.overlay-nav-link:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 4px;
  border-radius: 8px;
}

.menu-toggle:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 4px;
}

/* ===== PERFORMANCE ===== */
@media (prefers-reduced-motion: reduce) {
  .circular-overlay,
  .overlay-nav-item,
  .overlay-nav-link {
    transition: none;
  }

  .circular-overlay::before {
    animation: none;
    opacity: 1;
  }
}

/* Body scroll lock when menu is open */
body.menu-open {
  overflow: hidden;
}

/* Hide header when scrolled */
.header.hide-on-scroll {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}