/* ==========================================================================
   Component Styles
   ========================================================================== */

/* Index:
   1. Buttons
   2. Cards
   3. Branding Component (FitQuest Logo + Name)
   4. Navigation (Main Nav, App Nav, Tabs)
   5. Modals (General, Theme Selector)
   6. Forms (General, Auth Card Specifics)
   7. Banners
   8. Footer Elements
   9. Alerts / Notifications
  10. Loading Indicators
  11. Empty States
  12. Theme Selector Panel Specifics (Panel, Header, Body)
*/

/* 1. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; /* Align icon and text nicely */
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  border: var(--border-width-thick) solid transparent;
  border-radius: var(--border-radius-pill);
  cursor: pointer;
  user-select: none; /* Prevent text selection on click */
  transition-property: background-color, border-color, color, box-shadow, transform;
  transition-duration: var(--transition-speed-fast);
  transition-timing-function: var(--transition-timing);
}
.btn:focus-visible {
  /* Focus styles handled by base.css default */
}
.btn:disabled,
.btn.disabled {
  opacity: 0.65;
  cursor: not-allowed;
  box-shadow: none !important; /* Ensure no shadow on disabled */
  transform: none !important; /* Ensure no transform on disabled */
}
.btn > .icon { /* For icons within buttons */
  font-size: 1.2em; /* Slightly larger icon relative to button text */
  line-height: 1; /* Prevent icon from affecting button height */
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm),
              0 0 8px 2px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.2),
              0 0 18px 5px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.15),
              0 0 35px 10px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.1);
}
.btn-primary:hover,
.btn-primary:focus { /* Combined hover and focus for consistency */
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-text-on-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md),
              0 0 12px 3px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.4),
              0 0 25px 7px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.3),
              0 0 50px 12px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.2);
}
.btn-primary:active {
  transform: translateY(0); /* Reset transform for pressed state */
  background-color: hsl(var(--color-primary-hue), var(--color-primary-saturation), calc(var(--color-primary-lightness) - 15%));
  border-color: hsl(var(--color-primary-hue), var(--color-primary-saturation), calc(var(--color-primary-lightness) - 15%));
  box-shadow: var(--shadow-sm); /* Simpler shadow when pressed */
}

/* Secondary Button (Outline style) */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.dark-mode .btn-secondary {
  color: var(--color-primary-light); /* Ensure visibility in dark mode */
  border-color: var(--color-primary-light);
}
.btn-secondary:hover,
.btn-secondary:focus {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.dark-mode .btn-secondary:hover,
.dark-mode .btn-secondary:focus {
  background-color: var(--color-primary-light);
  color: var(--color-background); /* Ensure contrast on hover for dark mode */
  border-color: var(--color-primary-light);
}
.btn-secondary:active {
  transform: translateY(0);
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

/* Text Button (Link-like) */
.btn-text {
  background-color: transparent;
  color: var(--color-primary);
  border-color: transparent;
  padding-left: var(--space-xs); /* Minimal horizontal padding */
  padding-right: var(--space-xs);
  box-shadow: none; /* No shadow for text buttons */
}
.btn-text:hover,
.btn-text:focus {
  color: var(--color-primary-dark);
  text-decoration: underline;
  background-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.05); /* Subtle hover background */
  transform: none; /* No transform for text buttons usually */
  box-shadow: none;
}
.dark-mode .btn-text {
  color: var(--color-primary-light);
}
.dark-mode .btn-text:hover,
.dark-mode .btn-text:focus {
  color: var(--color-primary); /* Brighter primary on dark hover */
  background-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.1);
}

/* Icon-only Button Style */
.btn-icon {
  padding: var(--space-sm); /* Square-ish padding */
  border-radius: 50%; /* Make it circular */
  line-height: 1; /* Critical for icon-only buttons */
  border-width: var(--border-width); /* Thinner border often looks better */
}
.btn-icon.btn-secondary { /* Specific to icon-only secondary button */
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}
.btn-icon.btn-secondary:hover,
.btn-icon.btn-secondary:focus {
  color: var(--color-primary);
  background-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.1);
  border-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.2);
}
.btn-icon > .icon {
  margin: 0; /* Remove gap as there's no text */
  font-size: var(--font-size-md); /* Adjust icon size if needed */
}


/* Button Sizes */
.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
}
.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-md);
}

/* Full width button */
.btn-block {
  display: block; /* Or flex if children need flex alignment */
  width: 100%;
}

/* Google Button (inherits .btn styles and adds specifics) */
.btn-google {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm); /* Subtle shadow */
}
.btn-google:hover,
.btn-google:focus {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
  background-color: var(--color-surface-alt); /* Slight background change on hover */
}
.btn-google .google-icon { /* From your login.html svg */
  width: 1.2em; /* Relative to button font size */
  height: 1.2em;
}


/* 2. Cards
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg); /* Default large radius */
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform var(--transition-speed) var(--transition-timing),
              box-shadow var(--transition-speed) var(--transition-timing);
  height: 100%; /* Allows cards in a grid to be same height by default */
  display: flex; /* Enable flex column for easier footer placement */
  flex-direction: column;
}
.card:hover {
  transform: translateY(calc(var(--space-xxs) * -1));
  box-shadow: var(--shadow-lg);
}

.card-header,
.card-body,
.card-footer {
  padding: var(--space-lg);
}

.card-header {
  border-bottom: 1px solid var(--color-border);
  /* Removed background-color: var(--color-surface-alt); for a flatter look, can be added back if preferred */
}
.card-header h1, .card-header h2, .card-header h3, .card-header h4, .card-header h5, .card-header h6 {
  margin-bottom: 0;
}
.dark-mode .card-header {
  /* background-color: var(--color-background); /* Darker header in dark mode */
}

.card-body {
  flex-grow: 1; /* Allows body to expand and push footer down */
}

.card-footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-alt); /* Subtle differentiation for footer */
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-top: auto; /* Pushes footer to bottom if card body is short */
}
.dark-mode .card-footer {
  background-color: var(--color-background);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-md);
}

/* Example: Feature Card (adapting your .triple-item) */
.feature-card { /* This class would be added to a .card element */
  text-align: center;
}
.feature-card .card-body { /* Override to ensure its flex settings are correct for content */
  display: flex;
  flex-direction: column;
  align-items: center; /* Center content horizontally */
}
.feature-card-icon-wrapper {
  width: 70px; /* Adjusted from 80px */
  height: 70px;
  margin: 0 auto var(--space-lg);
  border-radius: var(--border-radius-lg); /* Squarer than pill, but rounded */
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-on-primary); /* White text on gradient */
  font-size: var(--font-size-2xl); /* Adjusted icon size */
  box-shadow: 0 4px 10px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.3);
  transition: transform var(--transition-speed) var(--transition-timing);
}
.feature-card:hover .feature-card-icon-wrapper {
  transform: scale(1.1) rotate(3deg); /* Subtle rotation */
}
.feature-card-title { /* h3 in your example */
  font-size: var(--font-size-lg); /* From base.css h4 is 1.5rem, this makes it slightly smaller */
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-sm);
}
.feature-card-description { /* p in your example */
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex-grow: 1;
}
.feature-card-list {
  list-style: none;
  padding: 0;
  text-align: left; /* List items usually left-aligned */
  margin-top: auto;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  width: 100%; /* Ensure list takes full width for text-align:left */
}
.feature-card-list li {
  display: flex;
  align-items: flex-start; /* Better for multi-line list items */
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
}
.feature-card-list li .icon {
  color: var(--color-primary);
  margin-top: 0.2em; /* Fine-tune alignment */
  flex-shrink: 0;
  font-size: 0.9em; /* Slightly smaller checkmark */
}

/* Specific Stat Card styling for Dashboard */
.stat-card .card-body {
  padding: var(--space-md); /* Smaller padding for stat cards */
}
.stat-card-icon {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  line-height: 1;
}
.stat-card-title {
  font-size: var(--font-size-sm); /* Smaller title for stat cards */
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
  font-weight: var(--font-weight-medium);
}
.stat-card-value {
  font-size: var(--font-size-xl); /* Prominent value */
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1.2;
  margin-bottom: 0;
}


/* 3. Branding Component (FitQuest Logo + Name)
   -------------------------------------------------------------------------- */
.fitquest-branding {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  color: inherit;
  vertical-align: middle;
}

.fitquest-branding-logo { /* img */
  height: var(--branding-logo-height, 32px); /* Default, override contextually */
  width: auto;
  flex-shrink: 0;
  display: block;
}

.fitquest-branding-name { /* span */
  font-size: var(--branding-font-size, var(--font-size-lg)); /* Default, override contextually */
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-text-primary);
  white-space: nowrap;
}


/* 4. Navigation (Main Nav, App Nav, Tabs)
   -------------------------------------------------------------------------- */

/* Main Navigation (for public pages like index, pricing) */
.main-nav {
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000; /* Ensure it's above most content */
  transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}
/* .main-nav .nav-container is handled by .container in layout.css */

.main-nav-logo img { /* Direct child if logo is just an image */
  height: 36px; /* Slightly smaller for main nav */
  width: auto;
  display: block;
  transition: transform var(--transition-speed-fast) ease;
}
.main-nav-logo:hover img { /* If logo is a link */
  transform: scale(1.05);
}
.main-nav-menu {
  list-style: none;
  padding: 0; margin: 0; /* Reset */
  display: flex;
  align-items: center;
  gap: var(--space-xs); /* Reduced gap for tighter links */
  margin-left: auto; /* This pushes the entire menu to the right */
}
.main-nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  transition: color var(--transition-speed-fast) ease, background-color var(--transition-speed-fast) ease;
}
.main-nav-link:hover,
.main-nav-link:focus,
.main-nav-link.active {
  color: var(--color-primary);
  background-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.1);
}
.main-nav-link.active {
  font-weight: var(--font-weight-semibold);
}
.main-nav-link .icon {
  font-size: 1em; /* Relative to link font size */
  margin-right: var(--space-xxs); /* If gap isn't enough */
}
/* Login/Signup button in main nav (often a .btn.btn-primary or .btn-secondary) */
.main-nav .btn {
    margin-left: var(--space-sm); /* Space it from other links */
    /* If .nav-link-cta from header.css is used, its margin-left:auto was removed to group links */
}


/* Mobile Navigation Toggle (Hamburger for .main-nav) */
.main-nav-toggle-label { /* The <label> for the hidden checkbox */
  display: none; /* Shown via media query */
  cursor: pointer;
  padding: var(--space-sm); /* Clickable area */
  z-index: 1002; /* Above menu if it slides over */
  background: none; border: none; /* Reset if it's a button */
}
.hamburger-icon { /* The span inside the label that forms the burger */
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  position: relative;
  transition: transform var(--transition-speed) ease, background-color var(--transition-speed) ease;
}
.hamburger-icon::before,
.hamburger-icon::after {
  content: '';
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  position: absolute;
  left: 0;
  transition: transform var(--transition-speed) ease, top var(--transition-speed) ease;
}
.hamburger-icon::before { top: -7px; }
.hamburger-icon::after { top: 7px; }

/* Active state for hamburger (when #main-nav-toggle is checked) */
.main-nav-toggle:checked ~ .main-nav-toggle-label .hamburger-icon { /* Adjusted selector if needed */
  background-color: transparent; /* Middle bar fades */
}
.main-nav-toggle:checked ~ .main-nav-toggle-label .hamburger-icon::before {
  transform: rotate(45deg);
  top: 0;
}
.main-nav-toggle:checked ~ .main-nav-toggle-label .hamburger-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

/* Mobile Menu Styles (for .main-nav-menu when it becomes visible on mobile) */
@media (max-width: 767px) { /* md-breakpoint, adjust as needed */
  .main-nav-toggle-label {
    display: block; /* Show hamburger */
  }
  .main-nav .nav-container {
    position: relative; /* For positioning menu if absolute */
  }
  .main-nav-menu {
    display: none; /* Hidden by default */
    position: absolute;
    top: 100%; /* Position below the navbar */
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: stretch; /* Links take full width */
    padding: var(--space-sm) 0;
    border-top: 1px solid var(--color-border);
    gap: 0; /* Reset gap for vertical items */
  }
  .main-nav-toggle:checked ~ .main-nav-menu { /* Show menu when toggle is checked */
    display: flex;
  }
  .main-nav-menu li {
    width: 100%;
  }
  .main-nav-link {
    padding: var(--space-md); /* Larger touch targets */
    justify-content: flex-start; /* Align text left */
    border-radius: 0;
    border-bottom: 1px solid var(--color-border);
  }
  .main-nav-menu li:last-child .main-nav-link {
    border-bottom: none;
  }
  .main-nav .btn { /* Full width for CTA button in mobile menu */
    margin: var(--space-sm) var(--space-md);
    display: block;
    width: auto; /* Let padding define width or set to 100% */
  }
}


/* App Navigation (Sidebar/Horizontal Scroll for logged-in area) */
.app-nav {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.app-nav-branding { /* Uses .fitquest-branding component */
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  /* Specific sizing for logo/name within this context should be here or on .fitquest-branding children */
}
.app-nav-branding .fitquest-branding-logo { height: 30px; }
.app-nav-branding .fitquest-branding-name { font-size: var(--font-size-lg); }

.app-nav-menu {
  list-style: none;
  padding: 0; margin: 0; /* Reset */
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.app-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm); /* Adjusted gap */
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  transition: color var(--transition-speed-fast) ease,
              background-color var(--transition-speed-fast) ease,
              transform var(--transition-speed-fast) ease,
              box-shadow var(--transition-speed-fast) ease;
}
.app-nav-link .icon { /* FontAwesome or SVG wrapper */
  font-size: var(--font-size-md); /* Adjusted for better proportion */
  width: 20px; /* Fixed width for alignment */
  text-align: center;
  line-height: 1; /* Ensure icon doesn't add extra height */
  flex-shrink: 0;
}
.app-nav-link img.icon { /* For SVG image icons used directly */
  width: 20px;
  height: 20px;
  object-fit: contain;
}
.app-nav-link > span { /* Text label */
  flex-grow: 1; /* Allow text to take available space */
}

.app-nav-link:hover,
.app-nav-link:focus {
  color: var(--color-primary);
  background-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.08);
  transform: translateX(var(--space-xxs)); /* Slight nudge */
}
.app-nav-link.active {
  color: var(--color-primary);
  background-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.12);
  font-weight: var(--font-weight-semibold);
  box-shadow: inset 3px 0 0 var(--color-primary); /* Active indicator on the left */
}

/* Responsive App Navigation (Horizontal Scroll on Mobile) */
@media (max-width: 991px) { /* lg breakpoint for sidebar to become top scrollable nav */
  .app-nav {
    flex-direction: column; /* Keep branding on top */
    /* padding: var(--space-sm); /* Reduce padding */
  }
  .app-nav-branding {
    /* Optionally hide branding text on very small screens if needed */
  }
  .app-nav-menu {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: var(--space-sm); /* For scrollbar space */
    border-bottom: 1px solid var(--color-border);
    margin-bottom: calc(var(--space-sm) * -1); /* Pull content slightly up if needed */

    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
  }
  .app-nav-menu::-webkit-scrollbar { display: none; }

  .app-nav-menu li {
    flex-shrink: 0; /* Prevent items from shrinking */
  }
  .app-nav-link {
    flex-direction: column; /* Icon above text */
    gap: var(--space-xxs);
    min-width: 75px; /* Min width for touch targets */
    text-align: center;
    padding: var(--space-sm) var(--space-xs); /* Adjust padding for compact view */
    font-size: var(--font-size-xs); /* Smaller text for compact view */
    box-shadow: none !important; /* Remove left inset shadow */
    transform: none !important; /* Remove nudge */
  }
  .app-nav-link.active {
    /* Active state for horizontal scroll */
    background-color: transparent; /* Remove bg */
    color: var(--color-primary);
    position: relative;
  }
  .app-nav-link.active::after { /* Underline for active link in horizontal mode */
    content: '';
    position: absolute;
    bottom: -1px; /* Align with bottom border of .app-nav-menu */
    left: var(--space-sm);
    right: var(--space-sm);
    height: var(--border-width-thick);
    background-color: var(--color-primary);
    border-radius: 1px;
  }
  .app-nav-link .icon, .app-nav-link img.icon {
    margin-bottom: var(--space-xxs); /* Space between icon and text */
    font-size: var(--font-size-lg); /* Slightly larger icons in this mode */
  }
  .app-nav-link img.icon { width: 22px; height: 22px; }
}


/* Tabs Navigation */
.tabs-nav {
  display: flex;
  border-bottom: var(--border-width-thick) solid var(--color-border);
  margin-bottom: var(--space-lg);
  overflow-x: auto;
  -ms-overflow-style: none; scrollbar-width: none; /* Hide scrollbar */
}
.tabs-nav::-webkit-scrollbar { display: none; }

.tab-button {
  padding: var(--space-sm) var(--space-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-bottom: var(--border-width-thick) solid transparent;
  margin-bottom: calc(var(--border-width-thick) * -1); /* Overlap main border for seamless indicator */
  cursor: pointer;
  transition: color var(--transition-speed-fast) ease, border-color var(--transition-speed-fast) ease;
  white-space: nowrap; /* Prevent tab text from wrapping */
  flex-shrink: 0; /* Prevent tabs from shrinking too much */
}
.tab-button:hover,
.tab-button:focus {
  color: var(--color-text-primary);
}
.tab-button.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.tab-content {
  display: none;
  padding-top: var(--space-md);
  animation: fadeIn 0.4s ease forwards; /* Ensure fadeIn keyframes are in animations.css */
}
.tab-content.active {
  display: block;
}


/* 5. Modals (General, Theme Selector Panel is separate)
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: hsla(0, 0%, 0%, 0.65); /* Slightly darker overlay */
  backdrop-filter: blur(5px); /* Stronger blur */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-speed) var(--transition-timing), visibility 0s linear var(--transition-speed);
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.modal-content {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-xl); /* More rounded */
  box-shadow: var(--shadow-xl);
  padding: 0; /* Header/body/footer will have padding */
  width: 100%;
  max-width: 550px; /* Slightly wider default */
  max-height: 90vh;
  display: flex; /* Use flex for easier header/body/footer layout */
  flex-direction: column;
  overflow: hidden; /* Prevents content from breaking border-radius */
  position: relative;
  transform: scale(0.95) translateY(10px); /* Entry animation */
  opacity: 0;
  transition: transform var(--transition-speed) cubic-bezier(0.25, 0.1, 0.25, 1.5), /* Bouncy pop-up */
              opacity var(--transition-speed) ease-out;
}
.modal-overlay.active .modal-content {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0; /* Prevent header from shrinking */
}
.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 0;
  color: var(--color-text-primary);
}
.modal-close-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  padding: var(--space-xs);
  line-height: 1;
  cursor: pointer;
  transition: color var(--transition-speed-fast) ease, transform var(--transition-speed-fast) ease;
  border-radius: 50%; /* Make it round */
}
.modal-close-btn:hover,
.modal-close-btn:focus {
  color: var(--color-text-primary);
  transform: scale(1.1);
  background-color: var(--color-surface-alt); /* Subtle hover background */
}
.modal-body {
  padding: var(--space-lg);
  overflow-y: auto; /* Scroll only body if content is too long */
  flex-grow: 1; /* Allow body to take available space */
}
.modal-body p:last-child { margin-bottom: 0; }

.modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  background-color: var(--color-surface-alt); /* Subtle differentiation */
  flex-shrink: 0; /* Prevent footer from shrinking */
}
.dark-mode .modal-footer {
  background-color: var(--color-background);
}

/* Theme Grid (used by Theme Selector) - styles from previous turn were good */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr)); /* Responsive columns */
  gap: var(--space-md);
}
.theme-btn {
  width: 100%;
  padding-top: 100%; /* Square aspect ratio */
  position: relative;
  border: 2px solid transparent;
  border-radius: var(--border-radius-lg); /* More rounded */
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-speed-fast) ease, box-shadow var(--transition-speed-fast) ease, border-color var(--transition-speed-fast) ease;
}
.theme-btn:hover {
  transform: scale(1.07);
  box-shadow: var(--shadow-md);
}
.theme-btn:focus-visible, /* Use focus-visible for keyboard */
.theme-btn.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px hsla(var(--color-primary-hue),var(--color-primary-saturation),var(--color-primary-lightness),0.3), var(--shadow-md);
}
.theme-btn .theme-check-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-xl); /* Adjusted size */
  opacity: 0;
  transition: opacity var(--transition-speed-fast) ease, transform var(--transition-speed-fast) ease;
  text-shadow: 0 1px 2px hsla(0, 0%, 0%, 0.4);
  pointer-events: none;
  transform: scale(0.8);
}
.theme-btn.active .theme-check-icon {
  opacity: 1;
  transform: scale(1);
}
/* Specific theme button background gradients are applied via inline style or JS */


/* 6. Forms
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--space-lg);
}
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}
.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-family: inherit;
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  background-clip: padding-box;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-speed-fast) ease, box-shadow var(--transition-speed-fast) ease;
}
/* Dark mode input styling */
.dark-mode .form-input,
.dark-mode .form-select,
.dark-mode .form-textarea {
    background-color: var(--color-background); /* Darker background for inputs */
    border-color: var(--color-border); /* Use dark mode border color */
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm), 0 0 0 3px hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.25);
  outline: none; /* We have a box-shadow focus indicator */
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.8; /* Slightly more subtle placeholder */
}
.form-textarea {
  min-height: 120px;
  resize: vertical;
}
.form-select {
  appearance: none;
  padding-right: calc(var(--space-md) + 24px);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23576574' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e"); /* Arrow for light mode */
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 12px 10px; /* Adjusted size */
}
.dark-mode .form-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23909399' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e"); /* Light arrow for dark mode */
}

/* Form validation styles */
.form-input.is-invalid, .form-textarea.is-invalid, .form-select.is-invalid {
  border-color: var(--color-error);
}
.form-input.is-invalid:focus, .form-textarea.is-invalid:focus, .form-select.is-invalid:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px hsla(0, 72%, 51%, 0.25); /* Error focus shadow */
}
.form-error-message {
  display: block;
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
}

/* Auth Card specific styles (Login/Signup forms) */
.auth-card { /* Applied to .card on login page */
  max-width: 420px; /* Slightly narrower */
  margin: var(--space-2xl) auto;
}
.auth-card .card-header { /* Override for auth card header */
  text-align: center;
  border-bottom: none; /* No border for a cleaner look */
  background-color: transparent; /* No distinct background for header */
  padding-bottom: var(--space-md);
}
.auth-card .card-header img {
  width: 50px; /* Smaller logo */
  height: auto;
  margin-bottom: var(--space-sm);
}
.auth-card .card-header h1 { /* "Welcome to FitQuest" */
    font-size: var(--font-size-xl); /* Smaller heading */
    margin-bottom: var(--space-xs);
}
.or-divider {
  text-align: center;
  margin: var(--space-lg) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.or-divider::before,
.or-divider::after {
  content: '';
  flex-grow: 1;
  height: 1px;
  background-color: var(--color-border);
}
.forgot-password-link { /* Used in login form */
  display: block;
  text-align: right;
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  color: var(--color-primary);
}
.form-toggle-link { /* "Already have an account? Log in" or similar */
  display: block;
  text-align: center;
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.form-toggle-link a { /* The actual link part */
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}
.auth-card .btn-google { /* Ensure Google button can be full width */
    width: 100%;
}


/* 7. Banners
   -------------------------------------------------------------------------- */
.banner {
  padding: var(--space-sm) var(--space-md);
  text-align: center;
  font-weight: var(--font-weight-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}
.banner-primary { /* e.g., price-banner */
  background-color: var(--banner-color);
  color: var(--color-text-primary);
  /* border-bottom: 1px solid var(--color-border); /* Optional: only if banner is always at top */
}
.dark-mode .banner-primary {
    color: var(--color-text-primary);
}
.banner .icon {
  font-size: 1.1em; /* Relative to banner text */
  line-height: 1;
}


/* 8. Footer Elements (from components/footer.html)
   -------------------------------------------------------------------------- */
.site-footer { /* Styles for the main <footer> element */
  background-color: var(--color-surface-alt);
  color: var(--color-text-secondary);
  padding: var(--space-xl) 0; /* Vertical padding, horizontal from .container */
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}
/* .site-footer .container is handled by layout.css */

.footer-content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg) var(--space-md); /* row-gap column-gap */
  margin-bottom: var(--space-xl);
}

.footer-section h4 {
  font-size: var(--font-size-sm); /* Smaller footer headings */
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.075em; /* Wider spacing for uppercase */
  position: relative;
  padding-bottom: var(--space-xs);
}
.footer-section h4::after { /* Underline for footer headings */
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px; /* Shorter underline */
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: var(--space-xs); /* Tighter spacing */
}
.footer-link, /* General class for links like mailto */
.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: color var(--transition-speed-fast) ease;
}
.footer-link:hover,
.footer-links a:hover,
.footer-link:focus,
.footer-links a:focus {
  color: var(--color-primary);
  text-decoration: underline;
}
.footer-link .icon { /* Icon in mailto link */
  /* font-size: 1.1em; */ /* If needed */
}

.social-links-footer { /* Wrapper for social icons in footer */
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}
.social-links-footer .social-link { /* Individual social icon link */
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  transition: color var(--transition-speed-fast) ease, transform var(--transition-speed-fast) ease;
}
.social-links-footer .social-link:hover,
.social-links-footer .social-link:focus {
  color: var(--color-primary);
  transform: scale(1.15); /* More pop */
}

.footer-bottom-text {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs); /* Smaller copyright text */
}
/* Styles for minimal footer (e.g., on login page) */
body.minimal-page .site-footer { /* Add .minimal-page to body of login.html etc. */
    background-color: transparent;
    border-top: none;
    box-shadow: none;
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
}
body.minimal-page .site-footer .footer-content-grid {
    display: none; /* Hide main grid on minimal pages */
}
body.minimal-page .site-footer .footer-bottom-text {
  margin-top: 0;
  border-top: none;
}


/* 9. Alert / Notification Messages
   -------------------------------------------------------------------------- */
.alert {
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  border-radius: var(--border-radius-md);
  border-left-width: 4px; /* Thicker accent border */
  border-left-style: solid;
  display: flex;
  align-items: flex-start; /* Align icon to top of text */
  gap: var(--space-md); /* Increased gap */
  box-shadow: var(--shadow-sm);
}
.alert-icon { /* Icon within alert */
  font-size: var(--font-size-lg);
  margin-top: 0.1em; /* Fine-tune vertical alignment */
  flex-shrink: 0; /* Prevent icon from shrinking */
  line-height: 1.4; /* Match text line height better */
}
.alert-content {
  flex-grow: 1;
}
.alert-title {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base); /* Match base text size or slightly larger */
  margin-bottom: var(--space-xs);
  color: inherit; /* Inherit color from parent .alert-* class */
}
.alert-message {
  font-size: var(--font-size-sm);
  line-height: 1.6;
}
.alert-message p:last-child { margin-bottom: 0; }

/* Alert Modifiers (Success, Error, Warning, Info) */
.alert-success {
  background-color: hsl(var(--color-primary-hue), 70%, 96%); /* Lighter background */
  border-color: var(--color-success);
  color: hsl(var(--color-primary-hue), 60%, 25%); /* Darker text for contrast */
}
.alert-success .alert-icon { color: var(--color-success); }
.dark-mode .alert-success {
  background-color: hsla(var(--color-primary-hue), 40%, 20%, 0.7);
  color: hsl(var(--color-primary-hue), 60%, 90%);
  border-color: hsla(var(--color-success), 100%, 70%, 0.7);
}
.dark-mode .alert-success .alert-icon { color: hsla(var(--color-success), 100%, 70%, 0.9); }


.alert-error {
  background-color: hsl(0, 80%, 96%);
  border-color: var(--color-error);
  color: hsl(0, 60%, 35%);
}
.alert-error .alert-icon { color: var(--color-error); }
.dark-mode .alert-error {
  background-color: hsla(0, 50%, 20%, 0.7);
  color: hsl(0, 70%, 90%);
  border-color: hsla(var(--color-error),100%,70%,0.7);
}
.dark-mode .alert-error .alert-icon { color: hsla(var(--color-error),100%,70%,0.9); }

.alert-warning {
  background-color: hsl(45, 100%, 96%);
  border-color: var(--color-warning);
  color: hsl(45, 100%, 25%);
}
.alert-warning .alert-icon { color: var(--color-warning); }
.dark-mode .alert-warning {
  background-color: hsla(45, 60%, 20%, 0.7);
  color: hsl(45, 100%, 85%);
  border-color: hsla(var(--color-warning),100%,70%,0.7);
}
.dark-mode .alert-warning .alert-icon { color: hsla(var(--color-warning),100%,70%,0.9); }

.alert-info {
  background-color: hsl(200, 80%, 96%);
  border-color: var(--color-info);
  color: hsl(200, 70%, 30%);
}
.alert-info .alert-icon { color: var(--color-info); }
.dark-mode .alert-info {
  background-color: hsla(200, 50%, 20%, 0.7);
  color: hsl(200, 70%, 90%);
  border-color: hsla(var(--color-info),100%,70%,0.7);
}
.dark-mode .alert-info .alert-icon { color: hsla(var(--color-info),100%,70%,0.9); }


/* 10. Loading Indicators
   -------------------------------------------------------------------------- */
.loading-spinner {
  display: inline-block;
  width: 2.5rem; /* 40px */
  height: 2.5rem;
  border-width: 0.25rem; /* 4px */
  border-style: solid;
  border-color: hsla(var(--color-primary-hue), var(--color-primary-saturation), var(--color-primary-lightness), 0.2);
  border-radius: 50%;
  border-top-color: var(--color-primary);
  animation: spin 0.8s linear infinite; /* spin keyframes in animations.css */
}

.auth-loading-overlay { /* Full page loader */
  position: fixed;
  inset: 0;
  background-color: hsla(var(--color-background-h, 0), var(--color-background-s, 0%), var(--color-background-l, 100%), 0.85); /* Default to light overlay */
  backdrop-filter: blur(4px);
  display: none; /* Hidden by default, shown by .active class */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  z-index: 3000; /* Very high z-index */
  color: var(--color-text-primary);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-speed) ease, visibility 0s linear var(--transition-speed);
}
.auth-loading-overlay.active {
  display: flex;
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}
.dark-mode .auth-loading-overlay { /* Dark mode overlay */
   background-color: hsla(var(--color-background-h, 220), var(--color-background-s, 18%), var(--color-background-l, 12%), 0.85);
}
.auth-loading-overlay .loading-spinner {
  width: 3.5rem; height: 3.5rem; border-width: 0.3rem;
}
.auth-loading-overlay p {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  margin-bottom: 0;
}


/* 11. Empty States
    -------------------------------------------------------------------------- */
.empty-state {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background-color: var(--color-surface-alt);
  border-radius: var(--border-radius-lg);
  border: 1px dashed var(--color-border);
  color: var(--color-text-secondary);
  display: flex; /* Use flex for better centering of content */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px; /* Ensure it has some height */
}
.dark-mode .empty-state {
    background-color: var(--color-background); /* Slightly different for dark mode */
}
.empty-state-icon {
  font-size: var(--font-size-3xl); /* Adjusted size */
  color: var(--color-text-muted);
  margin-bottom: var(--space-md); /* Adjusted spacing */
  display: block;
  line-height: 1;
}
.empty-state h3 {
  font-size: var(--font-size-lg); /* Adjusted size */
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs); /* Tighter spacing */
}
.empty-state p {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-lg);
  max-width: 450px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}
.empty-state .btn {
  /* Button already styled, no specific overrides unless needed */
}

/* Minimal Empty State (for smaller contexts) */
.empty-state-minimal {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  color: var(--color-text-muted);
}
.empty-state-minimal .empty-state-icon {
  font-size: var(--font-size-2xl); /* Smaller icon */
  margin-bottom: var(--space-sm);
}
.empty-state-minimal p {
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}


/* 12. Theme Selector Panel Specifics (Panel, Header, Body)
   -------------------------------------------------------------------------- */
.theme-selector-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background-color: var(--color-surface);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 0; /* Header/body provide padding */
  width: 90%;
  max-width: 380px; /* Slightly narrower for theme selector */
  z-index: 2010; /* Above other modals if needed */
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-speed) var(--transition-timing),
              transform var(--transition-speed) var(--transition-timing),
              visibility 0s linear var(--transition-speed);
  border: 1px solid var(--color-border);
  display: flex; /* Use flex for header/body layout */
  flex-direction: column;
  max-height: 80vh; /* Prevent it from being too tall */
}

.theme-selector-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
  transition-delay: 0s;
}

.theme-selector-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0; /* Prevent header from shrinking */
}

.theme-selector-title { /* h3 */
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 0;
}

.theme-selector-close-btn { /* This is a .btn.btn-icon potentially */
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--font-size-md); /* Adjusted icon size */
  padding: var(--space-xs);
  line-height: 1;
  cursor: pointer;
  transition: color var(--transition-speed-fast) ease, transform var(--transition-speed-fast) ease;
  border-radius: 50%;
}
.theme-selector-close-btn:hover,
.theme-selector-close-btn:focus {
  color: var(--color-text-primary);
  transform: scale(1.1);
  background-color: var(--color-surface-alt);
}
.dark-mode .theme-selector-close-btn:hover,
.dark-mode .theme-selector-close-btn:focus {
  background-color: var(--color-background);
}


.theme-selector-body {
  padding: var(--space-lg);
  overflow-y: auto; /* Scroll if many themes */
  flex-grow: 1;
}
/* .theme-grid and .theme-btn styles are above in the Modals section or here */