/* =============================================================================
   CBT Daily Tracker — styles.css
   Mobile-first, theme-aware, accessible, production-ready
   ============================================================================= */

/* =============================================================================
   1. CSS CUSTOM PROPERTIES
   ============================================================================= */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-surface: #f5f5f5;
  --color-border: #e0e0e0;
  --color-highlight: #72B7F0;
  --color-highlight-hover: #5aa0d9;
  --color-highlight-light: rgba(114, 183, 240, 0.15);
  --color-danger: #e74c3c;
  --color-success: #27ae60;
  --color-text-muted: #666666;
  --slider-track: #ddd;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --radius-sm: 4px;
  --transition: 0.2s ease;

  /* Layout */
  --nav-height-mobile: 60px;
  --nav-height-desktop: 56px;
  --max-width: 600px;
}

[data-theme="dark"] {
  --color-bg: #393939;
  --color-text: #e8e8e8;
  --color-surface: #4a4a4a;
  --color-border: #555555;
  --color-text-muted: #aaaaaa;
  --slider-track: #555;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* =============================================================================
   2. BASE & RESET
   ============================================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Helvetica, Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  transition: background-color var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

a {
  color: var(--color-highlight);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul,
ol {
  list-style: none;
}

fieldset {
  border: none;
}

/* Focus ring — visible for keyboard, hidden for mouse */
:focus-visible {
  outline: 2px solid var(--color-highlight);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* =============================================================================
   3. LAYOUT
   ============================================================================= */

.page-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1rem calc(var(--nav-height-mobile) + 1.25rem);
  width: 100%;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-top: 0.5rem;
}

.page-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

/* =============================================================================
   4. NAVIGATION
   ============================================================================= */

/* ---- Mobile: fixed bottom nav ---- */
.main-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--nav-height-mobile);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: stretch;
  z-index: 50;
  transition: background-color var(--transition), border-color var(--transition);
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.5rem;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  min-height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  transition: color var(--transition);
  -webkit-tap-highlight-color: transparent;
}

.nav-item:hover {
  color: var(--color-highlight);
  text-decoration: none;
}

.nav-item.active {
  color: var(--color-highlight);
}

.nav-item .nav-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  line-height: 1;
}

.nav-item .nav-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-item.active .nav-icon svg {
  stroke-width: 2.25;
}

.nav-label {
  font-size: 0.7rem;
  line-height: 1;
}


/* =============================================================================
   5. THEME TOGGLE BUTTON
   ============================================================================= */

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition),
    background-color var(--transition);
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  border-color: var(--color-highlight);
  color: var(--color-highlight);
  background-color: var(--color-highlight-light);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  pointer-events: none;
}

.btn-theme {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition),
    background-color var(--transition);
  flex-shrink: 0;
}

.btn-theme:hover {
  border-color: var(--color-highlight);
  color: var(--color-highlight);
  background-color: var(--color-highlight-light);
}

.btn-theme svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  pointer-events: none;
}

/* Show/hide based on current theme */
.icon-sun {
  display: none;
}

.icon-moon {
  display: block;
}

[data-theme="dark"] .icon-sun {
  display: block;
}

[data-theme="dark"] .icon-moon {
  display: none;
}

/* =============================================================================
   6. FORM SECTIONS (fieldset)
   ============================================================================= */

.form-section {
  background-color: var(--color-surface);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  border: none;
  width: 100%;
  transition: background-color var(--transition), box-shadow var(--transition);
}

.section-title,
.form-section legend {
  display: block;
  width: 100%;
  font-weight: 600;
  color: var(--color-highlight);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.875rem;
  padding: 0;
}

.form-section legend {
  background-color: var(--color-surface);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-bg);
}

/* =============================================================================
   7. FORM FIELDS
   ============================================================================= */

.field-group {
  margin-bottom: 1rem;
}

.field-group:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  font-weight: 500;
  color: var(--color-text);
}

/* Date input */
input[type="date"],
input[type="text"],
input[type="email"],
select {
  display: block;
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  min-height: 44px;
  transition: border-color var(--transition), background-color var(--transition),
    color var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

input[type="date"]:focus,
input[type="text"]:focus,
input[type="email"]:focus,
select:focus {
  border-color: var(--color-highlight);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-highlight-light);
}

input[type="date"]::-webkit-calendar-picker-indicator {
  opacity: 0.6;
  cursor: pointer;
  filter: none;
}

[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
}

/* =============================================================================
   8. RADIO NUMBER GROUP (replaces sliders)
   ============================================================================= */

.radio-number-group {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.25rem;
}

.radio-number-group label {
  display: inline-flex;
  flex: 1 1 0;
  min-width: 0;
  margin: 0;
  padding: 0;
}

/* Hide the actual radio input visually */
.radio-number-group input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  opacity: 0;
}

/* The visible button */
.radio-number-group label span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition),
    color var(--transition);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* SVG icons inside radio buttons */
.radio-number-group label span svg {
  width: 60%;
  height: 60%;
  flex-shrink: 0;
}

.radio-number-group label span:hover {
  border-color: var(--color-highlight);
  color: var(--color-highlight);
  background-color: var(--color-highlight-light);
}

/* Checked state */
.radio-number-group input[type="radio"]:checked + span {
  background-color: var(--color-highlight);
  border-color: var(--color-highlight);
  color: #ffffff;
  font-weight: 600;
}

/* Focus ring on the visible span */
.radio-number-group input[type="radio"]:focus-visible + span {
  outline: 2px solid var(--color-highlight);
  outline-offset: 2px;
}

/* =============================================================================
   9. SECTION HINT & CONDITIONAL INNER
   ============================================================================= */

.section-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  margin-top: -0.25rem;
}

/* Topic blocks — each collapsible topic in "Heute erlebt" */
.topic-block {
  padding-bottom: 0.75rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.topic-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.topic-block .field-group {
  margin-bottom: 0;
}

/* Bordered cluster when conditional group is visible */
.conditional-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-bottom: 0.75rem;
  background-color: var(--color-surface);
}

.conditional-inner {
  margin-bottom: 0.5rem;
}

/* Per-area entries for Überverantwortung */
.area-entry {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  background-color: var(--color-bg);
}

.area-entry-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.area-entry-toggle {
  flex-shrink: 0;
}

.area-entry-name {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

.area-entry-details {
  margin-top: 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}


/* =============================================================================
   10. TOGGLE SWITCH
   ============================================================================= */

.toggle-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  min-height: 44px;
}

.toggle-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  padding-right: 1rem;
}

.toggle-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

/* Visually hidden native checkbox */
.toggle-switch input[type="checkbox"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  opacity: 0;
}

.toggle-track {
  display: inline-flex;
  align-items: center;
  width: 52px;
  height: 28px;
  border-radius: 14px;
  background-color: var(--color-border);
  padding: 2px;
  cursor: pointer;
  transition: background-color 0.25s ease;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

.toggle-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: #ffffff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  transform: translateX(0);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

/* Checked state */
.toggle-switch input[type="checkbox"]:checked + .toggle-track {
  background-color: var(--color-highlight);
}

.toggle-switch input[type="checkbox"]:checked + .toggle-track .toggle-thumb {
  transform: translateX(24px);
}

/* Focus ring on track */
.toggle-switch input[type="checkbox"]:focus-visible + .toggle-track {
  outline: 2px solid var(--color-highlight);
  outline-offset: 2px;
}

/* Hover */
.toggle-track:hover {
  opacity: 0.9;
}

/* =============================================================================
   10. NUMBER INPUT & INLINE FIELD LAYOUT
   ============================================================================= */

/* Inline label + input side-by-side (like toggle-wrapper) */
.inline-field-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  min-height: 44px;
}

.inline-field-wrapper label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 0;
  padding-right: 1rem;
}

.number-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

input[type="number"] {
  width: 80px;
  padding: 0.5rem 0.4rem;
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  min-height: 44px;
  transition: border-color var(--transition), background-color var(--transition);
  -moz-appearance: textfield;
  appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"]:focus {
  border-color: var(--color-highlight);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-highlight-light);
}

.unit-label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 400;
}

/* =============================================================================
   11. TEXTAREA (NOTES)
   ============================================================================= */

textarea {
  display: block;
  width: 100%;
  min-height: 80px;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  resize: none;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.55;
  transition: border-color var(--transition), background-color var(--transition),
    color var(--transition);
}

textarea:focus {
  border-color: var(--color-highlight);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-highlight-light);
}

textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.char-counter {
  text-align: right;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
  line-height: 1;
  transition: color var(--transition);
}

.char-counter.warning {
  color: var(--color-highlight);
}

.char-counter.limit {
  color: var(--color-danger);
  font-weight: 600;
}

/* =============================================================================
   12. SUBMIT BUTTON (PRIMARY)
   ============================================================================= */

.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.875rem 1.25rem;
  background-color: var(--color-highlight);
  color: #ffffff;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
  letter-spacing: 0.01em;
  transition: background-color var(--transition), transform var(--transition),
    box-shadow var(--transition);
  -webkit-tap-highlight-color: transparent;
  text-align: center;
}

.btn-primary:hover {
  background-color: var(--color-highlight-hover);
  box-shadow: 0 4px 12px rgba(114, 183, 240, 0.35);
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: none;
}

.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-primary svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* =============================================================================
   13. EXPORT / IMPORT BUTTONS (SECONDARY)
   ============================================================================= */

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.625rem 1rem;
  background-color: transparent;
  color: var(--color-highlight);
  border: 2px solid var(--color-highlight);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
  letter-spacing: 0.01em;
  transition: background-color var(--transition), color var(--transition),
    transform var(--transition);
  -webkit-tap-highlight-color: transparent;
  text-align: center;
  white-space: nowrap;
}

.btn-secondary:hover {
  background-color: var(--color-highlight-light);
}

.btn-secondary:active {
  transform: scale(0.98);
}

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.note-item {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
}

.note-item:last-child {
  border-bottom: none;
}

.note-date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 0.2rem;
}

.note-text {
  font-size: 0.9rem;
  line-height: 1.4;
  white-space: pre-wrap;
}

.data-actions {
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
}

.data-actions > * {
  flex: 1;
  display: flex;
  box-sizing: border-box;
  margin-bottom: 0;
}

.import-feedback {
  margin-top: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.import-feedback--success {
  background-color: rgba(39, 174, 96, 0.15);
  color: var(--color-success);
}

.import-feedback--error {
  background-color: rgba(231, 76, 60, 0.15);
  color: var(--color-danger);
}

.btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

/* Danger variant */
.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.625rem 1rem;
  background-color: transparent;
  color: var(--color-danger);
  border: 2px solid var(--color-danger);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
  transition: background-color var(--transition), color var(--transition),
    transform var(--transition);
}

.btn-danger:hover {
  background-color: rgba(231, 76, 60, 0.1);
}

.btn-danger:active {
  transform: scale(0.98);
}

/* =============================================================================
   14. TOAST NOTIFICATION
   ============================================================================= */

.toast {
  position: fixed;
  bottom: calc(var(--nav-height-mobile) + 0.75rem);
  left: 50%;
  transform: translateX(-50%);
  background-color: #333333;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  white-space: nowrap;
  z-index: 1000;
  box-shadow: var(--shadow-md);
  pointer-events: none;
  max-width: calc(100vw - 2rem);
  overflow: hidden;
  text-overflow: ellipsis;
}

.toast.success {
  background-color: var(--color-success);
}

.toast.error {
  background-color: var(--color-danger);
}

.toast.info {
  background-color: var(--color-highlight);
}

/* Toast enter animation */
.toast-enter {
  animation: toastSlideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Toast exit animation */
.toast-exit {
  animation: toastFadeOut 0.25s ease forwards;
}

@keyframes toastSlideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes toastFadeOut {
  from {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  to {
    opacity: 0;
    transform: translateX(-50%) translateY(-8px);
  }
}

/* =============================================================================
   15. HIDDEN / CONDITIONAL FIELDS
   ============================================================================= */

.hidden {
  display: none !important;
}

.field-group.hidden {
  display: none !important;
}

/* Animated reveal (progressive disclosure) */
.field-group.reveal {
  animation: fieldReveal 0.25s ease forwards;
}

@keyframes fieldReveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =============================================================================
   16. DIALOG / MODAL
   ============================================================================= */

.dialog-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  animation: overlayFadeIn 0.2s ease forwards;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.dialog-overlay.hidden {
  display: none !important;
}

@keyframes overlayFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.dialog {
  background-color: var(--color-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 340px;
  width: calc(100% - 2rem);
  box-shadow: var(--shadow-md);
  animation: dialogSlideIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  position: relative;
}

@keyframes dialogSlideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.dialog-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
  line-height: 1.35;
}

.dialog-body {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.dialog-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Small button variant for dialog actions */
.dialog-actions .btn-secondary,
.dialog-actions .btn-danger {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* =============================================================================
   17. ANALYSIS PAGE
   ============================================================================= */

/* Date range bar */
.date-range-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1rem;
}

.preset-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.375rem 0.875rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background-color: transparent;
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  min-height: 34px;
  transition: background-color var(--transition), color var(--transition),
    border-color var(--transition);
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
}

.preset-btn:hover {
  border-color: var(--color-highlight);
  color: var(--color-highlight);
}

.preset-btn.active {
  background-color: var(--color-highlight);
  color: #ffffff;
  border-color: var(--color-highlight);
}

/* Custom date range inputs */
.date-range-inputs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.date-range-inputs input[type="date"] {
  width: auto;
  min-width: 140px;
  font-size: 0.875rem;
  padding: 0.375rem 0.625rem;
  min-height: 36px;
}

.date-range-separator {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Metric selector */
.metric-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.metric-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.375rem 0.875rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background-color: transparent;
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  min-height: 34px;
  transition: background-color var(--transition), color var(--transition),
    border-color var(--transition);
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
}

.metric-tag:hover {
  border-color: var(--color-highlight);
  color: var(--color-highlight);
}

.metric-tag.active {
  background-color: var(--color-highlight);
  color: #ffffff;
  border-color: var(--color-highlight);
}

/* Chart */
.chart-container {
  position: relative;
  width: 100%;
  height: 280px;
  margin-bottom: 1.5rem;
}

.chart-title {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Stats summary cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.stat-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 0.875rem;
  box-shadow: var(--shadow);
  transition: background-color var(--transition);
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-highlight);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
  line-height: 1.3;
  min-height: 2.6em;
  display: flex;
  align-items: flex-start;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.5;
  display: block;
}

.empty-state p {
  font-size: 0.9rem;
  line-height: 1.5;
}

/* =============================================================================
   18. UTILITY CLASSES
   ============================================================================= */

/* Spacing */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }

/* Text */
.text-muted { color: var(--color-text-muted); }
.text-highlight { color: var(--color-highlight); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.8rem; }
.font-600 { font-weight: 600; }

/* Flex */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }

/* Divider */
.divider {
  height: 1px;
  background-color: var(--color-border);
  border: none;
  margin: 0.75rem 0;
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-highlight-light);
  border-top-color: var(--color-highlight);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

/* Screen-reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =============================================================================
   19. REDUCED MOTION
   ============================================================================= */

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

  .toggle-thumb {
    transition: none;
  }
}

/* =============================================================================
   20. RESPONSIVE — TABLET & DESKTOP (768px+)
   ============================================================================= */

@media (min-width: 768px) {

  /* ---- Layout ---- */
  .page-container {
    padding-bottom: 2rem;
    padding-top: 1.25rem;
  }

  /* ---- Navigation: switch to top ---- */
  .main-nav {
    position: fixed;
    top: 0;
    bottom: auto;
    left: 0;
    right: 0;
    height: var(--nav-height-desktop);
    border-top: none;
    border-bottom: 1px solid var(--color-border);
    justify-content: center;
  }

  .nav-item {
    flex: 0 0 auto;
    flex-direction: row;
    gap: 0.5rem;
    padding: 0 1.5rem;
    min-height: var(--nav-height-desktop);
    font-size: 0.875rem;
  }

  /* Active underline on desktop */
  .nav-item.active {
    box-shadow: inset 0 -2px 0 var(--color-highlight);
  }

  /* ---- Page container offset for top nav ---- */
  body {
    padding-top: var(--nav-height-desktop);
  }

  /* ---- Form sections ---- */
  .form-section {
    padding: 1.25rem 1.5rem;
  }

  /* ---- Charts ---- */
  .chart-container {
    height: 320px;
  }

  /* ---- Stats grid ---- */
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* ---- Toasts ---- */
  .toast {
    bottom: 1rem;
  }

  /* ---- Dialog ---- */
  .dialog {
    max-width: 380px;
  }

  /* ---- Date range bar ---- */
  .date-range-bar {
    flex-wrap: nowrap;
  }
}

/* ---- Large desktop (1024px+) ---- */
@media (min-width: 1024px) {
  .page-container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .form-section {
    padding: 1.5rem 1.75rem;
  }

  .chart-container {
    height: 360px;
  }

  .stats-grid {
    gap: 1rem;
  }
}

/* =============================================================================
   EOF
   ============================================================================= */