/* =============================================
   THE DIGI LAB — Header & Navigation
   Includes: navbar, tubelight pill, dropdown,
   mobile menu, theme toggle, light theme
============================================= */

/* ---- Navbar ---- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.6rem 0;
  transition: background 0.4s ease, padding 0.4s ease, backdrop-filter 0.4s ease;
}
.navbar.scrolled {
  background: rgba(0, 0, 0, 0.75);
  padding: 1rem 0;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}
/* .nav-logo: see style.css (global) */

/* ---- Tubelight Pill ---- */
.nav-pill {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 9999px;
  padding: 5px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: visible;
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255,255,255,0.06);
}

.tubelight-indicator {
  position: absolute;
  top: 5px;
  left: 0;
  height: calc(100% - 10px);
  background: rgba(250, 164, 26, 0.09);
  border: 1px solid rgba(250, 164, 26, 0.2);
  border-radius: 9999px;
  pointer-events: none;
  z-index: 0;
  overflow: visible;
}
.tubelight-indicator.ready {
  transition:
    left 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
    width 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tubelight-glow {
  position: absolute;
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 3px;
  background: var(--accent);
  border-radius: 9999px 9999px 0 0;
  overflow: visible;
  box-shadow: 0 0 6px 1px rgba(250, 164, 26, 0.6);
}
.tubelight-glow::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 28px;
  background: radial-gradient(ellipse at bottom, rgba(250, 164, 26, 0.5) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.tubelight-glow::after {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 16px;
  background: radial-gradient(ellipse at bottom, rgba(250, 164, 26, 0.7) 0%, transparent 70%);
  filter: blur(4px);
  border-radius: 50%;
  pointer-events: none;
}

/* ---- Nav Links ---- */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  position: relative;
  z-index: 1;
}
.nav-links > li > a,
.nav-links > li.nav-dropdown > a {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  padding: 0.5rem 1.1rem;
  border-radius: 9999px;
  transition: color 0.25s ease;
  position: relative;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.nav-links > li > a::after { display: none !important; }
.nav-links > li > a:hover { color: rgba(255, 255, 255, 0.9); }
.nav-links > li > a.active { color: var(--accent); }

/* ---- Dropdown ---- */
.nav-dropdown { position: relative; }
.nav-dropdown > a .chevron {
  font-size: 0.55rem;
  opacity: 0.6;
  transition: transform var(--transition);
}
.nav-dropdown:hover > a .chevron { transform: rotate(180deg); }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 10, 10, 0.95);
  border: 1px solid var(--black-border);
  border-radius: 12px;
  padding: 0.5rem 0;
  min-width: 210px;
  opacity: 0;
  visibility: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.6);
  transition: opacity 0.2s ease, visibility 0.2s ease, top 0.2s ease;
}
.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  top: calc(100% + 6px);
}
.dropdown-menu a {
  display: block;
  padding: 0.6rem 1.25rem;
  font-family: var(--font-head);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s ease, background 0.2s ease;
}
.dropdown-menu a::after { display: none; }
.dropdown-menu a:hover {
  color: var(--accent);
  background: rgba(250, 164, 26, 0.07);
}

/* ---- Right side ---- */
.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* ---- Hamburger ---- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ---- Mobile Menu ---- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--black);
  z-index: 999;
  padding: 6rem 2rem 2rem;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  display: block;
  padding: 1rem 0;
  border-bottom: 1px solid var(--black-border);
  font-family: var(--font-head);
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--accent); }
.mobile-menu .mobile-sub {
  padding-left: 1rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
}
.mobile-menu .mobile-cta { margin-top: 2rem; border: none; }

/* ---- Theme Toggle: see style.css (global) ---- */

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav-pill { display: none; }
  .nav-right .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}

/* =============================================
   LIGHT THEME — Header & Navigation
============================================= */
[data-theme="light"] .navbar.scrolled {
  background: rgba(240,240,238,0.92);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.08);
}
[data-theme="light"] .nav-pill {
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.09);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
[data-theme="light"] .tubelight-indicator {
  background: rgba(250,164,26,0.12);
  border-color: rgba(250,164,26,0.28);
}
[data-theme="light"] .nav-links > li > a,
[data-theme="light"] .nav-links > li.nav-dropdown > a { color: #222; }
[data-theme="light"] .nav-links > li > a.active,
[data-theme="light"] .nav-links > li.nav-dropdown > a.active { color: var(--accent); }
[data-theme="light"] .nav-links > li > a:hover,
[data-theme="light"] .nav-links > li.nav-dropdown > a:hover { color: #111; }
/* [data-theme="light"] .nav-logo span: see style.css */
[data-theme="light"] .dropdown-menu {
  background: #fff;
  border-color: #e0e0e0;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
[data-theme="light"] .dropdown-menu a { color: #222; }
[data-theme="light"] .dropdown-menu a:hover { background: #f5f5f5; color: #111; }
[data-theme="light"] .mobile-menu { background: #f0f0ee; }
[data-theme="light"] .mobile-menu a { color: #333; border-bottom-color: #dcdcda; }