/* Header CSS - Global header styles */
#global-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px var(--shadow-color);
    z-index: var(--z-sticky);
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

/* Logo */
.logo-link {
    text-decoration: none;
    color: inherit;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
}

.logo svg {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: var(--font-xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* PWA Install Button */
.pwa-install-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-right: var(--spacing-sm);
}

.pwa-install-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.pwa-install-button svg {
    width: 20px;
    height: 20px;
}

.pwa-install-button span {
    display: none;
}

@media (min-width: 768px) {
    .pwa-install-button span {
        display: inline;
    }
}

/* Main navigation - UPDATED FOR COMPACT + CALCULATORS */
.main-nav {
    display: flex;
    gap: 8px; /* More compact spacing */
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px; /* Tighter gap between icon and text */
    padding: 8px 12px; /* More compact padding */
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem; /* Slightly smaller text */
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    text-decoration: none;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
}

.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(74, 144, 226, 0.1);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: var(--radius-sm);
}

.nav-link svg {
    width: 18px; /* Slightly smaller icons */
    height: 18px;
}

.nav-link span {
    display: inline-block;
}

/* Header actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ============================================
   AUTH BUTTONS STYLING
   ============================================ */

/* Auth buttons container */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 180px;
}

/* Loading state */
.auth-loading {
    width: 180px;
    height: 36px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: auth-loading 1.5s infinite;
    border-radius: 6px;
}

@keyframes auth-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

[data-theme="dark"] .auth-loading {
    background: linear-gradient(90deg, #2a2a2a 25%, #3a3a3a 50%, #2a2a2a 75%);
    background-size: 200% 100%;
}

/* Login Button */
.btn-login {
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    color: var(--primary-color, #4A90E2);
    border: 1px solid var(--primary-color, #4A90E2);
    background: transparent;
    white-space: nowrap;
}

.btn-login:hover {
    background: rgba(74, 144, 226, 0.1);
    transform: translateY(-1px);
}

/* Sign Up Button */
.btn-signup {
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    background: var(--primary-color, #4A90E2);
    color: white;
    border: 1px solid var(--primary-color, #4A90E2);
    white-space: nowrap;
}

.btn-signup:hover {
    background: #3a7bc8;
    border-color: #3a7bc8;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
}

/* Dashboard Button */
.btn-dashboard {
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-color, #4A90E2);
    color: white;
    border: none;
    white-space: nowrap;
}

.btn-dashboard:hover {
    background: #3a7bc8;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
}

.btn-dashboard svg {
    width: 18px;
    height: 18px;
}

/* User Badge */
.user-badge {
    padding: 6px 12px;
    background: rgba(74, 144, 226, 0.1);
    color: var(--primary-color, #4A90E2);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: default;
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle svg {
    width: 24px;
    height: 24px;
    stroke: var(--text-color);
}

/* Sticky header behavior */
.header-scrolled {
    box-shadow: 0 4px 20px var(--shadow-color);
}

/* Fullscreen mode adjustments */
body.fullscreen #global-header {
    transform: translateY(-100%);
}

body.fullscreen #main-content {
    padding-top: 0;
}

/* Dark theme header */
[data-theme="dark"] #global-header {
    background-color: var(--bg-secondary);
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .btn-login {
    color: #6fb3ff;
    border-color: #6fb3ff;
}

[data-theme="dark"] .btn-login:hover {
    background: rgba(111, 179, 255, 0.1);
}

[data-theme="dark"] .btn-signup {
    background: #6fb3ff;
    border-color: #6fb3ff;
    color: #1a1a1a;
}

[data-theme="dark"] .btn-signup:hover {
    background: #5a9de6;
    border-color: #5a9de6;
}

[data-theme="dark"] .btn-dashboard {
    background: #6fb3ff;
    color: #1a1a1a;
}

[data-theme="dark"] .btn-dashboard:hover {
    background: #5a9de6;
}

[data-theme="dark"] .user-badge {
    background: rgba(111, 179, 255, 0.15);
    color: #6fb3ff;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet adjustments */
@media (max-width: 1200px) {
    .main-nav {
        gap: 6px;
    }
    
    .nav-link {
        padding: 6px 10px;
        font-size: 0.85rem;
    }
    
    .auth-buttons {
        gap: 8px;
        min-width: 160px;
    }
    
    .btn-login,
    .btn-signup,
    .btn-dashboard {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
    
    .user-badge {
        max-width: 100px;
        font-size: 0.8rem;
        padding: 5px 10px;
    }
}

/* Laptop - hide nav text, show only icons */
@media (max-width: 992px) {
    .nav-link span {
        display: none;
    }
    
    .nav-link {
        padding: 8px;
    }
    
    .nav-link svg {
        width: 20px;
        height: 20px;
    }
}

/* Mobile - YOUR BEAUTIFUL BOTTOM NAV BAR */
@media (max-width: 768px) {
    .header-content {
        padding: var(--spacing-sm) 0;
    }

    .logo-text {
        font-size: var(--font-lg);
    }

    /* ✅ FIXED Mobile navigation - bottom scrollable bar */
    .main-nav {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        background-color: var(--bg-color);
        border-top: 1px solid var(--border-color);
        border-bottom: none;
        padding: 0;
        display: flex;
        flex-direction: row;
        justify-content: flex-start;
        overflow-x: auto;
        overflow-y: hidden;
        white-space: nowrap;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
        transform: none;
        transition: none;
        z-index: var(--z-sticky);
        box-shadow: 0 -2px 10px var(--shadow-color);
        gap: 0; /* Reset gap for mobile */
    }

    /* Hide scrollbar */
    .main-nav::-webkit-scrollbar {
        display: none;
    }

    .nav-link {
        flex: 0 0 auto;
        min-width: 70px;
        flex-direction: column;
        justify-content: center;
        padding: var(--spacing-sm) var(--spacing-xs);
        border-radius: 0;
        font-size: var(--font-xs);
        text-align: center;
    }

    .nav-link.active {
        background-color: rgba(74, 144, 226, 0.1);
        color: var(--primary-color);
    }

    .nav-link.active::after {
        display: none;
    }

    .nav-link span {
        display: block;
        margin-top: 2px;
    }

    .nav-link svg {
        width: 24px;
        height: 24px;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .header-actions {
        margin-left: auto;
    }

    #main-content {
        padding-bottom: 70px;
    }

    .pwa-install-button {
        padding: var(--spacing-sm);
    }

    .pwa-install-button span {
        display: none;
    }
    
    /* Hide auth buttons on mobile */
    .auth-buttons {
        display: none;
    }
}

/* Small mobile phones */
@media (max-width: 480px) {
    .logo svg {
        width: 32px;
        height: 32px;
    }

    .nav-link span {
        font-size: var(--font-sm);
    }

    .icon-btn {
        width: 36px;
        height: 36px;
    }
}

/* Print styles */
@media print {
    #global-header {
        position: relative;
        box-shadow: none;
        border-bottom: 2px solid black;
    }
    
    .auth-buttons,
    .pwa-install-button,
    .header-actions {
        display: none;
    }
}






/* ============================================
   DROPDOWNS + COMPACT NAV (Desktop + Mobile)
   (Clean replacement - removes duplicates)
   ============================================ */

/* Make sure dropdown isn't clipped */
#global-header,
#global-header .container,
#global-header .header-content {
  overflow: visible;
}

/* Desktop: make header/nav more compact */
@media (min-width: 769px) {
  .header-content {
    padding: 10px 0;              /* was var(--spacing-md) */
  }

  .main-nav {
    gap: 6px;                      /* tighter spacing between buttons */
  }

  .nav-link {
    padding: 7px 10px;             /* tighter padding */
    font-size: 0.88rem;            /* slightly smaller */
    gap: 6px;
  }

  .nav-link svg {
    width: 18px;
    height: 18px;
  }

  .main-nav .nav-link-btn {
    padding: 7px 10px;             /* match links */
    border-radius: var(--radius-md);
  }
}

/* Dropdown base */
.main-nav .nav-dropdown {
  position: relative;
}

.main-nav .nav-link-btn {
  background: transparent;
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.main-nav .nav-link-btn:hover {
  color: var(--primary-color);
  background-color: var(--bg-secondary);
}

.main-nav .nav-caret {
  margin-left: 2px;
  font-size: 12px;
  opacity: 0.8;
}

/* Dropdown menu (desktop) - NO GAP */
.main-nav .nav-dropdown-menu {
  display: none;
  position: absolute;

  /* Attach to the button (slight overlap removes “floating” feel) */
  top: calc(100% - 2px);
 right: auto;
 left: auto;
  margin-top: 0;

  /* Auto-fit width to content (no wasted space) */
  width: max-content;
  min-width: 0;
  max-width: 320px;

  background: var(--bg-color);
  border: 1px solid rgba(0,0,0,.10);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,.10);
  padding: 8px;
  z-index: 99999;
}


/* Prevents layout shift while header loads */
#global-header:empty {
    min-height: 60px;
}




/* Invisible hover bridge so it never closes when crossing tiny gap */
@media (hover: hover) and (pointer: fine) {
  .main-nav .nav-dropdown-menu::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -12px;
    height: 12px;
  }
}

/* Show dropdown: click + keyboard + hover */
.main-nav .nav-dropdown.open .nav-dropdown-menu,
.main-nav .nav-dropdown:focus-within .nav-dropdown-menu {
  display: block;
}

@media (hover: hover) and (pointer: fine) {
  .main-nav .nav-dropdown:hover .nav-dropdown-menu {
    display: block;
  }
}

/* Dropdown links */
.main-nav .dropdown-link {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--text-color);
  font-size: 14px;
  opacity: 0.95;
}

.main-nav .dropdown-link:hover {
  background: rgba(0,0,0,.05);
}

/* Dark theme dropdown background */
[data-theme="dark"] .main-nav .nav-dropdown-menu {
  background: var(--bg-secondary);
  border-color: rgba(255,255,255,.12);
}

/* Mobile: keep your bottom nav, dropdown opens as a sheet above it */
@media (max-width: 768px) {
  .main-nav .nav-dropdown-menu {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 74px;         /* adjust if your bottom header height differs */
    top: auto;
    min-width: auto;
    max-height: 60vh;
    overflow: auto;
    border-radius: 16px;
    animation: dropdownSlideUp .18s ease-out;
  }

  @keyframes dropdownSlideUp {
    from { transform: translateY(10px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
  }
}