/* ============================================
   Component Styles
   Using design tokens throughout
   ============================================ */

/* ============================================
   Skip Link
   ============================================ */

.skip-link {
  position: absolute;
  top: var(--spacing-2);
  left: var(--spacing-2);
  z-index: 1001;
  padding: var(--spacing-2) var(--spacing-4);
  background-color: var(--color-button-primary-bg);
  color: var(--color-button-primary-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-100%);
  transition: opacity var(--transition-base) var(--easing-ease-out),
              transform var(--transition-base) var(--easing-ease-out);
}

.skip-link:focus {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ============================================
   Base & Reset
   ============================================ */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-background-primary);
  color: var(--color-text-primary);
  min-height: 100vh;
  transition: background-color var(--transition-base) var(--easing-ease-in-out),
              color var(--transition-base) var(--easing-ease-in-out);
}

/* ============================================
   Container
   ============================================ */

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-4) var(--spacing-3);
}

@media (min-width: 768px) {
  .container {
    padding: var(--spacing-6) var(--spacing-4);
  }
}

/* ============================================
   Navigation Bar
   ============================================ */

/* Mobile-first: Default layout (375px+) */
.nav {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-section-margin);
  padding-top: var(--spacing-2);
  padding-left: var(--spacing-3);
  padding-right: var(--spacing-3);
  padding-bottom: var(--spacing-2);
  border-bottom: 1px solid var(--color-border-default);
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-background-primary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Top row: Title and theme toggle side-by-side */
.nav__title {
  font-size: var(--font-size-xl);
  font-weight: var(--text-heading-1-font-weight);
  line-height: var(--text-heading-1-line-height);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-base) var(--easing-ease-in-out);
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav__title:hover {
  color: var(--color-button-primary-bg);
}

.nav__title:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Theme toggle on same row as title on mobile */
.theme-toggle {
  grid-column: 2;
  grid-row: 1;
  align-self: center;
  display: block;
  flex-shrink: 0;
  min-width: 44px;
  width: fit-content;
}

/* Navigation links on second row */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  justify-content: center;
  grid-column: 1 / -1;
  grid-row: 2;
  flex-wrap: wrap;
}

.nav__link {
  font-size: var(--text-body-font-size);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base) var(--easing-ease-in-out),
              background-color var(--transition-base) var(--easing-ease-in-out);
  position: relative;
}

.nav__link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-background-secondary);
}

.nav__link:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.nav__link--active {
  color: var(--color-text-primary);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: calc(-1 * var(--spacing-2) - 1px);
  left: var(--spacing-2);
  right: var(--spacing-2);
  height: 2px;
  background-color: var(--color-button-primary-bg);
  border-radius: var(--radius-sm);
}

/* Desktop layout (768px+) */
@media (min-width: 768px) {
  .nav {
    /* Full-width navigation bar */
    width: 100%;
    /* Add padding to match container */
    padding-top: var(--spacing-2);
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
    padding-bottom: var(--spacing-2);
    /* Use grid layout with three equal columns to center links perfectly */
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    grid-template-rows: auto;
    align-items: center;
    gap: var(--spacing-3);
  }
  
  .nav__title {
    font-size: 36px;
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
  }
  
  .nav__links {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
  }
  
  .theme-toggle {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
  }

  .nav__link--active::after {
    bottom: calc(-1 * var(--spacing-2) - 1px);
  }
}

/* ============================================
   Header (for subtitle on generator page)
   ============================================ */

.header__subtitle {
  font-size: var(--text-body-font-size);
  font-weight: var(--text-body-font-weight);
  line-height: var(--text-body-line-height);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-section-margin);
}

/* ============================================
   Theme Toggle
   ============================================ */

.theme-toggle {
  position: relative;
}

.button--icon {
  width: 44px !important;
  height: 44px !important;
  padding: 0 !important;
  min-width: 44px !important;
  max-width: 44px !important;
  background-color: var(--color-button-secondary-bg);
  color: var(--color-text-primary);
  display: flex !important;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  visibility: visible;
  box-sizing: border-box;
  flex-shrink: 0;
}

.button--icon:hover {
  background-color: var(--color-button-secondary-hover);
}

.button--icon:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.theme-icon {
  width: 20px;
  height: 20px;
  display: block;
  visibility: visible;
  flex-shrink: 0;
}

.theme-menu {
  position: absolute;
  top: calc(100% + var(--spacing-2));
  right: 0;
  background-color: var(--card-background);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-1);
  min-width: 140px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.theme-menu[hidden] {
  display: none;
}

.theme-menu__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--text-body-font-size);
  color: var(--color-text-primary);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  width: 100%;
  font-family: var(--font-family-sans);
  transition: background-color var(--transition-base) var(--easing-ease-in-out);
}

.theme-menu__item:hover {
  background-color: var(--color-background-secondary);
}

.theme-menu__item:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: -2px;
}

.theme-check {
  width: 16px;
  height: 16px;
  color: var(--color-button-primary-bg);
  flex-shrink: 0;
}

.theme-check[hidden] {
  display: none;
}

/* ============================================
   Card Component
   ============================================ */

.card {
  background-color: var(--card-background);
  padding: var(--card-padding);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
  transition: box-shadow var(--transition-base) var(--easing-ease-in-out);
}

/* ============================================
   Form Section
   ============================================ */

.form-section {
  margin-bottom: var(--spacing-section-margin);
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--form-field-gap);
}

/* ============================================
   Form Field
   ============================================ */

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.form-label {
  font-size: var(--text-label-font-size);
  font-weight: var(--text-label-font-weight);
  line-height: var(--text-label-line-height);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.form-label__required {
  color: var(--color-error);
  font-size: var(--font-size-xs);
}

.form-label__optional {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-normal);
  font-size: var(--font-size-xs);
}

/* ============================================
   Form Input
   ============================================ */

.form-input,
.form-select {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-size: var(--input-font-size);
  font-family: var(--font-family-sans);
  color: var(--color-text-primary);
  background-color: var(--color-background-secondary);
  border: var(--input-border-width) solid var(--color-border-default);
  border-radius: var(--input-border-radius);
  transition: border-color var(--input-transition),
              background-color var(--input-transition),
              color var(--input-transition);
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus {
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.form-input::placeholder {
  color: var(--color-text-tertiary);
}

.form-input--readonly {
  background-color: var(--color-background-secondary);
  cursor: default;
  user-select: all;
}

.form-input--readonly:focus {
  box-shadow: none;
}

/* Project Input with Prefix */
.project-input-wrapper {
  display: flex;
  align-items: center;
  width: 100%;
  position: relative;
}

.project-input-prefix {
  position: absolute;
  left: var(--input-padding-x);
  color: var(--color-text-secondary);
  font-size: var(--input-font-size);
  font-family: var(--font-family-sans);
  pointer-events: none;
  z-index: 1;
  user-select: none;
}

.project-input-wrapper .form-input {
  padding-left: calc(var(--input-padding-x) + 1ch + 0.375rem);
}

.project-input-wrapper .form-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .project-input-wrapper .form-input:focus {
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

/* Select Styling */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-2) center;
  background-size: 12px;
  padding-right: var(--spacing-5);
  cursor: pointer;
}

[data-theme="dark"] .form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23e5e7eb' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

/* ============================================
   Priority Dropdown
   ============================================ */

.priority-dropdown {
  position: relative;
  width: 100%;
}

.priority-dropdown__trigger {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  font-size: var(--input-font-size);
  font-family: var(--font-family-sans);
  color: var(--color-text-primary);
  background-color: var(--color-background-secondary);
  border: var(--input-border-width) solid var(--color-border-default);
  border-radius: var(--input-border-radius);
  transition: border-color var(--input-transition),
              background-color var(--input-transition),
              color var(--input-transition);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-2);
  text-align: left;
}

.priority-dropdown__trigger:hover {
  border-color: var(--color-border-focus);
}

.priority-dropdown__trigger:focus-visible {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .priority-dropdown__trigger:focus-visible {
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.priority-dropdown__content {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  flex: 1;
}

.priority-flag {
  flex-shrink: 0;
  display: block;
}

.priority-dropdown__icon {
  flex-shrink: 0;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base) var(--easing-ease-in-out);
}

.priority-dropdown__trigger[aria-expanded="true"] .priority-dropdown__icon {
  transform: rotate(180deg);
}

.priority-dropdown__menu {
  position: absolute;
  top: calc(100% + var(--spacing-1));
  left: 0;
  right: 0;
  background-color: var(--card-background);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-1);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
  max-height: 300px;
  overflow-y: auto;
}

.priority-dropdown__menu[hidden] {
  display: none;
}

.priority-dropdown__option {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--text-body-font-size);
  color: var(--color-text-primary);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  width: 100%;
  font-family: var(--font-family-sans);
  transition: background-color var(--transition-base) var(--easing-ease-in-out);
}

.priority-dropdown__option:hover {
  background-color: var(--color-background-secondary);
}

.priority-dropdown__option:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: -2px;
}

.priority-dropdown__option .priority-flag {
  flex-shrink: 0;
}

.priority-dropdown__option span {
  flex: 1;
}

.priority-checkmark {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--color-button-primary-bg);
  margin-left: auto;
}

.priority-dropdown__option--selected {
  background-color: var(--color-background-secondary);
}

/* ============================================
   Form Helper & Error
   ============================================ */

.form-helper {
  font-size: var(--text-helper-font-size);
  font-weight: var(--text-helper-font-weight);
  line-height: var(--text-helper-line-height);
  color: var(--color-text-secondary);
}

.form-helper a {
  color: var(--color-text-secondary);
  text-decoration: underline;
}

.form-helper a:visited {
  color: var(--color-text-secondary);
}

.form-error {
  font-size: var(--text-helper-font-size);
  font-weight: var(--text-helper-font-weight);
  line-height: var(--text-helper-line-height);
  color: var(--color-error);
  display: none;
}

.form-error:not(:empty) {
  display: block;
}

/* ============================================
   Button Component
   ============================================ */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--button-gap);
  padding: var(--button-padding-y) var(--button-padding-x);
  font-size: var(--button-font-size);
  font-weight: var(--button-font-weight);
  font-family: var(--font-family-sans);
  line-height: 1;
  border: none;
  border-radius: var(--button-border-radius);
  cursor: pointer;
  transition: background-color var(--button-transition),
              color var(--button-transition),
              transform var(--button-transition),
              box-shadow var(--button-transition);
  -webkit-tap-highlight-color: transparent;
  min-height: 44px; /* Minimum tap target size */
}

@media (min-width: 768px) {
  .button {
    min-width: 120px;
  }
}

.button:active {
  transform: scale(0.98);
}

.button--primary {
  background-color: var(--color-button-primary-bg);
  color: var(--color-button-primary-text);
  width: 100%;
}

.button--primary:hover:not(:disabled) {
  background-color: var(--color-button-primary-hover);
}

.button--primary:disabled {
  background-color: var(--color-button-disabled-bg);
  color: var(--color-button-disabled-text);
  cursor: not-allowed;
  transform: none;
}

.button--secondary {
  background-color: var(--color-button-secondary-bg);
  color: var(--color-button-secondary-text);
  width: 100%;
}

.button--secondary:hover:not(:disabled) {
  background-color: var(--color-button-secondary-hover);
}

.button--coffee {
  background-color: #e34432;
  color: #ffffff;
  width: 100%;
}

.button--coffee:hover:not(:disabled) {
  background-color: #cf3520;
}

.button--coffee:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ============================================
   Output Section
   ============================================ */

.output-section {
  margin-bottom: var(--spacing-section-margin);
}

.output-section[hidden] {
  display: none !important;
}

.output-section__title {
  font-size: var(--text-heading-2-font-size);
  font-weight: var(--text-heading-2-font-weight);
  line-height: var(--text-heading-2-line-height);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-3);
}

.output-actions {
  display: flex;
  flex-direction: column;
  gap: var(--output-button-gap);
  margin-top: var(--output-section-gap);
}

.bmc-button-container {
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-3);
  border-top: 1px solid var(--color-border-default);
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-3);
}

.bmc-button-container[hidden] {
  display: none;
}

.coffee-button-container {
  margin-top: var(--spacing-3);
}

.coffee-button-container[hidden] {
  display: none;
}

/* ============================================
   Snackbar
   ============================================ */

.snackbar {
  position: fixed;
  bottom: var(--spacing-4);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--color-gray-800);
  color: var(--color-white);
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-body-font-size);
  font-weight: var(--font-weight-medium);
  min-width: 280px;
  max-width: 90%;
  text-align: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--transition-base) var(--easing-ease-out),
              transform var(--transition-base) var(--easing-ease-out);
  pointer-events: none;
}

[data-theme="dark"] .snackbar {
  background-color: #374151; /* Dark gray-700 for dark theme */
  color: #f3f4f6; /* Light text for contrast */
}

.snackbar:not([hidden]) {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.snackbar__message {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .snackbar {
    transition: opacity 0.01ms;
  }
}

/* ============================================
   QR Code Container
   ============================================ */

.qr-container {
  margin-top: var(--output-section-gap);
  padding: var(--qr-container-padding);
  background-color: var(--qr-container-background);
  border: var(--qr-container-border);
  border-radius: var(--qr-container-border-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  animation: fadeIn var(--transition-slow) var(--easing-ease-out);
}

.qr-container .form-label {
  margin-bottom: var(--spacing-1);
  text-align: center;
}

.qr-container[hidden] {
  display: none;
}

#qr-error {
  margin-top: var(--spacing-2);
}

.qr-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  width: 300px;
  height: 300px;
}

.qr-image[hidden] {
  display: none;
}

@media (max-width: 767px) {
  .qr-image {
    width: 100%;
    max-width: 300px;
    height: auto;
  }
}

.qr-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3);
  min-height: 300px;
  width: 100%;
}

.qr-loading[hidden] {
  display: none;
}

.qr-loading__spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border-default);
  border-top-color: var(--color-button-primary-bg);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.qr-loading__text {
  font-size: var(--text-body-font-size);
  color: var(--color-text-secondary);
  margin: 0;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============================================
   Info Section
   ============================================ */

.info-section {
  margin-bottom: var(--spacing-section-margin);
}

.info-card {
  background-color: var(--color-background-secondary);
  padding: var(--card-padding);
  border-radius: var(--card-border-radius);
}

.info-card__title {
  font-size: var(--text-heading-2-font-size);
  font-weight: var(--text-heading-2-font-weight);
  line-height: var(--text-heading-2-line-height);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-3);
}

.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-info-gap);
  margin-bottom: var(--spacing-3);
}

.info-list li {
  font-size: var(--text-body-font-size);
  line-height: var(--text-body-line-height);
  color: var(--color-text-secondary);
  padding-left: var(--spacing-4);
  position: relative;
}

.info-list li::before {
  content: '•';
  position: absolute;
  left: var(--spacing-2);
  color: var(--color-text-tertiary);
}

/* Links within info sections */
.info-list a,
.info-text a {
  color: var(--color-button-primary-bg);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
  transition: color var(--transition-base) var(--easing-ease-in-out),
              text-decoration-color var(--transition-base) var(--easing-ease-in-out);
  font-weight: var(--font-weight-medium);
}

.info-list a:hover,
.info-text a:hover {
  color: var(--color-button-primary-hover);
  text-decoration-color: var(--color-button-primary-hover);
}

.info-list a:visited,
.info-text a:visited {
  color: var(--color-button-primary-bg);
  opacity: 0.8;
}

.info-list a:focus-visible,
.info-text a:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.info-note {
  font-size: var(--text-caption-font-size);
  line-height: var(--text-caption-line-height);
  color: var(--color-text-tertiary);
  padding-top: var(--spacing-2);
  border-top: 1px solid var(--color-border-default);
}

.info-note strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
}

.info-text {
  font-size: var(--text-body-font-size);
  line-height: var(--text-body-line-height);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-3);
}

.info-text:last-child {
  margin-bottom: 0;
}

.info-list--numbered {
  list-style: decimal;
  padding-left: var(--spacing-4);
}

.info-list--numbered li {
  padding-left: var(--spacing-2);
}

.info-list--numbered li::before {
  display: none;
}

.page-heading {
  font-size: var(--text-heading-1-font-size);
  font-weight: var(--text-heading-1-font-weight);
  line-height: var(--text-heading-1-line-height);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-section-margin);
  text-align: center;
}

/* ============================================
   Table of Contents
   ============================================ */

.toc-nav {
  margin-top: var(--spacing-2);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0;
  margin: 0;
}

.toc-link {
  font-size: var(--text-caption-font-size);
  line-height: 1.4;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 4px var(--spacing-2);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base) var(--easing-ease-in-out),
              background-color var(--transition-base) var(--easing-ease-in-out);
  display: block;
}

.toc-link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-background-secondary);
}

.toc-link:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ============================================
   Use Case Section
   ============================================ */

.use-case {
  margin-top: var(--spacing-5);
  padding-top: var(--spacing-5);
  border-top: 1px solid var(--color-border-default);
}

.use-case:first-of-type {
  margin-top: var(--spacing-3);
  padding-top: var(--spacing-3);
  border-top: none;
}

.use-case__title {
  font-size: var(--text-heading-2-font-size);
  font-weight: var(--text-heading-2-font-weight);
  line-height: var(--text-heading-2-line-height);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-3);
}

.use-case__buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-top: var(--spacing-3);
}

.use-case__button--primary {
  width: 100%;
}

.use-case__buttons-secondary {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  width: 100%;
}

.use-case__buttons-secondary .use-case__button {
  width: 100%;
}

@media (min-width: 768px) {
  .use-case__buttons-secondary {
    flex-direction: row;
    gap: var(--spacing-2);
  }
  
  .use-case__buttons-secondary .use-case__button {
    flex: 1;
    width: auto;
  }
}

/* ============================================
   Accordion Component
   ============================================ */

.accordion {
  margin-bottom: var(--spacing-3);
  border-bottom: 1px solid var(--color-border-default);
}

.accordion:last-child {
  margin-bottom: 0;
  border-bottom: none;
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-2);
  padding: var(--spacing-3) 0;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-family-sans);
  font-size: var(--text-body-font-size);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  transition: color var(--transition-base) var(--easing-ease-in-out);
}

.accordion__trigger:hover {
  color: var(--color-button-primary-bg);
}

.accordion__trigger:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.accordion__question {
  flex: 1;
}

.accordion__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base) var(--easing-ease-in-out),
              color var(--transition-base) var(--easing-ease-in-out);
}

.accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(180deg);
  color: var(--color-button-primary-bg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  visibility: hidden;
  transition: max-height var(--transition-base) var(--easing-ease-in-out),
              padding-top var(--transition-base) var(--easing-ease-in-out),
              padding-bottom var(--transition-base) var(--easing-ease-in-out);
  padding-top: 0;
  padding-bottom: 0;
}

.accordion__content--expanded {
  max-height: 500px !important;
  padding-top: var(--spacing-2);
  padding-bottom: var(--spacing-3);
}

.accordion__content[hidden] {
  display: block;
  visibility: hidden;
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.accordion__content:not([hidden]).accordion__content--expanded {
  visibility: visible;
}

/* ============================================
   Responsive Adjustments
   ============================================ */

@media (min-width: 768px) {
  .nav__title {
    font-size: 36px;
  }

  .card {
    padding: var(--spacing-5);
  }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
.button:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}