/* ===== NAVBAR =====
 * Shared top navigation bar used across all pages.
 * Last updated: 2026-06-18
 */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border); height: 68px;
}
.navbar .container {
  display: flex; align-items: center; justify-content: space-between; height: 100%;
}

/* Logo */
.nav-logo {
  display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 22px;
}
.nav-logo .logo-icon {
  width: 48px; height: 48px; border-radius: 10px;
  background-image: url("../celercloud-icon.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* Nav links */
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 15px; color: var(--text-mid); font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover { color: var(--primary); }

/* Right-side actions */
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-right .btn { padding: 8px 20px; font-size: 14px; }

/* Compact nav buttons */
.login-btn  { padding: 8px 16px; }
.register-btn { padding: 8px 20px; }
.login-btn, .register-btn { font-size: 14px; }

/* ===== LANGUAGE SWITCHER ===== */
.lang-switcher { position: relative; }
.lang-switcher-btn {
  display: flex; align-items: center; gap: 6px; height: 36px;
  padding: 0 8px; font-size: 18px; color: var(--text-mid);
  cursor: pointer; border-radius: 6px; outline: none;
  background: transparent; border: none;
  transition: color .2s, background .2s;
}
.lang-switcher-btn:hover {
  color: var(--primary); background: var(--primary-light);
}
.lang-switcher-btn .arrow-icon {
  font-size: 12px; transition: transform .2s;
}
.lang-switcher.open .lang-switcher-btn .arrow-icon {
  transform: rotate(180deg);
}
.lang-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  min-width: 130px; background: #fff; border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,.1); border: 1px solid var(--border);
  padding: 4px; z-index: 1001;
  opacity: 0; visibility: hidden; transform: translateY(-4px);
  transition: all .2s ease;
}
.lang-switcher.open .lang-dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.lang-option {
  display: block; width: 100%; padding: 8px 16px; font-size: 14px;
  color: var(--text-mid); border-radius: 6px; cursor: pointer;
  background: transparent; border: none; text-align: left;
  transition: all .15s;
}
.lang-option:hover { background: var(--bg-gray); }
.lang-option.is-active {
  color: var(--primary); background: var(--primary-light); font-weight: 600;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 930px) {
  .nav-logo { font-size: 16px; }
  .login-btn, .register-btn { font-size: 12px !important; }
  .nav-links a { font-size: 12px; }
}

@media (max-width: 835px) {
  .nav-logo .logo-icon { width: 30px; height: 30px; }
  .nav-logo { font-size: 14px; }
  .login-btn, .register-btn { padding: 6px 14px !important; font-size: 12px !important; }
  .nav-links { display: none; }
}

/* ===== HAMBURGER MENU ===== */
.hamburger {
  display: none;
  flex-direction: column; justify-content: center; align-items: center;
  width: 36px; height: 36px; gap: 5px;
  cursor: pointer; background: none; border: none;
  padding: 4px; z-index: 1001;
}
.hamburger span {
  display: block; width: 22px; height: 2.5px;
  background: var(--text-mid); border-radius: 2px;
  transition: all .3s ease;
}
.hamburger.open span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Mobile drawer */
.mobile-drawer {
  display: none;
  position: fixed; top: 68px; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,.98); backdrop-filter: blur(12px);
  z-index: 999; padding: 24px 24px 48px;
  flex-direction: column; gap: 12px;
  overflow-y: auto;
}
.mobile-drawer.open { display: flex; }
.mobile-drawer a {
  display: block; padding: 14px 16px; font-size: 17px; font-weight: 500;
  color: var(--text-mid); border-radius: 8px; transition: all .15s;
}
.mobile-drawer a:hover { background: var(--primary-light); color: var(--primary); }
.mobile-drawer .drawer-divider {
  height: 1px; background: var(--border); margin: 8px 0;
}
.mobile-drawer .drawer-buttons {
  display: flex; flex-direction: column; gap: 10px; margin-top: 8px;
}
.mobile-drawer .drawer-buttons .btn { justify-content: center; }

@media (max-width: 835px) {
  .hamburger { display: flex; }
}