/* ============================================
   JOINT JOURNEY - Design System & Global Styles
   Green theme, elderly-friendly, accessible
   ============================================ */

/* --- Web fonts: Bitter (headings) + Inter (body) --- */
@import url('https://fonts.googleapis.com/css2?family=Bitter:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Primary Palette - Based on Little Greene Three Farm Green 306 */
  --green-900: #2A3532;
  --green-800: #354140;
  --green-700: #475953;
  --green-600: #546660;
  --green-500: #677872;
  --green-400: #849490;
  --green-300: #A3B0AD;
  --green-200: #C4CDCB;
  --green-100: #E1E7E5;
  --green-50:  #F0F3F2;

  /* Warm Accent (celebrations, CTAs) */
  --amber-600: #FF8F00;
  --amber-500: #FFA726;
  --amber-400: #FFCA28;
  --amber-100: #FFF3E0;

  /* Neutrals */
  --text-primary: #1A1A2E;
  --text-secondary: #4A4A5A;
  --text-muted: #7A7A8A;
  --text-on-dark: #FFFFFF;
  --text-on-green: #FFFFFF;

  --bg-body: #FAFDF7;
  --bg-white: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-muted: #F5F7F3;

  --border-light: #E0E4DC;
  --border-medium: #C8CCC4;

  /* Feedback */
  --success: #475953;
  --warning: #FF8F00;
  --error: #D32F2F;
  --info: #1976D2;

  /* Semantic surfaces (tinted info/warn/success panels) */
  --info-bg: #EAF1FB;
  --info-border: #B9D2F2;
  --info-text: #0D47A1;
  --warn-bg: #FFF4E6;
  --warn-border: #FFD9A8;
  --warn-text: #B45309;
  --success-bg: var(--green-50);
  --success-border: var(--green-300);
  --success-text: var(--green-900);

  /* Aliases & accessible accents (also fixes vars referenced in app.css) */
  --primary: var(--green-800);
  --primary-dark: var(--green-900);
  --amber-text: #B45309; /* WCAG-safe amber for text on white */

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

  /* Typography */
  --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: 'Bitter', Georgia, 'Times New Roman', serif;
  --font-size-base: 18px;
  --font-size-sm: 16px;
  --font-size-xs: 14px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 30px;
  --font-size-3xl: 38px;
  --font-size-4xl: 48px;
  --line-height: 1.6;
  --line-height-tight: 1.3;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Touch targets */
  --min-touch: 48px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--text-primary);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

:focus-visible {
  outline: 3px solid var(--green-600);
  outline-offset: 2px;
}

.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;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--font-size-4xl); margin-bottom: var(--space-lg); }
h2 { font-size: var(--font-size-3xl); margin-bottom: var(--space-lg); }
h3 { font-size: var(--font-size-2xl); margin-bottom: var(--space-md); }
h4 { font-size: var(--font-size-xl); margin-bottom: var(--space-md); }
h5 { font-size: var(--font-size-lg); margin-bottom: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

a {
  color: var(--green-700);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--green-900);
}

strong { font-weight: 700; color: var(--text-primary); }

ul, ol {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

li {
  margin-bottom: var(--space-sm);
}

/* --- Layout Utilities --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: var(--min-touch);
  padding: 14px 28px;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background-image: linear-gradient(135deg, var(--green-700), var(--green-800));
  background-color: var(--green-800);
  color: var(--text-on-green);
  border-color: var(--green-800);
}

.btn-primary:hover {
  background-image: linear-gradient(135deg, var(--green-800), var(--green-900));
  background-color: var(--green-900);
  border-color: var(--green-900);
  color: var(--text-on-green);
}

/* Warm "call to action" button - draws the eye to the main next action */
.btn-cta {
  background-image: linear-gradient(135deg, var(--amber-500), var(--amber-600));
  background-color: var(--amber-600);
  color: #3A2600;
  border-color: var(--amber-600);
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(255, 143, 0, 0.28);
}

.btn-cta:hover {
  background-image: linear-gradient(135deg, var(--amber-600), #E67E00);
  background-color: #E67E00;
  border-color: #E67E00;
  color: #3A2600;
  box-shadow: 0 6px 18px rgba(255, 143, 0, 0.36);
}

.btn-secondary {
  background-color: transparent;
  color: var(--green-800);
  border-color: var(--green-800);
}

.btn-secondary:hover {
  background-color: var(--green-50);
  color: var(--green-900);
}

.btn-accent {
  background-color: var(--amber-600);
  color: var(--text-on-dark);
  border-color: var(--amber-600);
}

.btn-accent:hover {
  background-color: #E67E00;
  border-color: #E67E00;
  color: var(--text-on-dark);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--bg-muted);
  color: var(--text-primary);
}

.btn-lg {
  padding: 18px 36px;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  min-height: 40px;
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal), border-color var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* Clickable cards get a gentle lift to signal interactivity */
.card[onclick]:hover,
.card[role="button"]:hover {
  transform: translateY(-3px);
  border-color: var(--green-300);
}

.card-highlight {
  border-left: 4px solid var(--green-600);
}

.card-success {
  background: var(--green-50);
  border-color: var(--green-300);
}

/* --- Forms --- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.form-hint {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  min-height: var(--min-touch);
  padding: 12px 16px;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background-color: var(--bg-white);
  border: 2px solid var(--border-medium);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--green-600);
  box-shadow: 0 0 0 3px rgba(46, 125, 91, 0.15);
  outline: none;
}

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

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%234A4A5A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 44px;
}

.form-error {
  color: var(--error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
}

/* Radio & Checkbox Cards */
.option-cards {
  display: grid;
  gap: var(--space-md);
}

.option-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--bg-white);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: var(--min-touch);
}

.option-card:hover {
  border-color: var(--green-400);
  background: var(--green-50);
}

.option-card.selected {
  border-color: var(--green-600);
  background: var(--green-50);
}

.option-card input[type="radio"],
.option-card input[type="checkbox"] {
  width: 24px;
  height: 24px;
  accent-color: var(--green-700);
  flex-shrink: 0;
}

.option-card-content {
  flex: 1;
}

.option-card-title {
  font-weight: 600;
  font-size: var(--font-size-lg);
  color: var(--text-primary);
}

.option-card-desc {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-green {
  background: var(--green-100);
  color: var(--green-900);
}

.badge-amber {
  background: var(--amber-100);
  color: var(--amber-text);
}

/* --- Progress Bar --- */
.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--bg-muted);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green-600), var(--green-400));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* --- Alerts --- */
.alert {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid;
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-base);
}

.alert-success {
  background: var(--green-50);
  border-color: var(--green-300);
  color: var(--green-900);
}

.alert-info {
  background: var(--info-bg);
  border-color: var(--info-border);
  color: var(--info-text);
}

.alert-warning {
  background: var(--warn-bg);
  border-color: var(--warn-border);
  color: var(--warn-text);
}

/* --- Checklist --- */
.checklist {
  list-style: none;
  padding: 0;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-light);
  min-height: var(--min-touch);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.checklist-item:hover {
  background: var(--green-50);
}

.checklist-item.checked {
  opacity: 0.6;
}

.checklist-item.checked .checklist-text {
  text-decoration: line-through;
}

.checklist-item input[type="checkbox"] {
  width: 24px;
  height: 24px;
  accent-color: var(--green-700);
  flex-shrink: 0;
}

.checklist-text {
  flex: 1;
  font-size: var(--font-size-base);
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: var(--space-xs);
  border-bottom: 2px solid var(--border-light);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  flex: 0 0 auto; /* don't shrink: size to content so a long week strip scrolls instead of overlapping on mobile */
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  min-height: var(--min-touch);
  transition: all var(--transition-fast);
  margin-bottom: -2px;
}

/* Phase separator labels inside the week strip (#week-tabs) must not shrink either */
#week-tabs > span {
  flex: 0 0 auto;
  align-self: center;
}


.tab:hover {
  color: var(--green-700);
}

.tab.active {
  color: var(--green-800);
  border-bottom-color: var(--green-600);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.modal-close {
  width: var(--min-touch);
  height: var(--min-touch);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.modal-close:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--green-600);
  font-weight: 500;
  animation: slideIn var(--transition-normal) ease;
  max-width: 400px;
}

.toast-success { border-left-color: var(--success); }
.toast-warning { border-left-color: var(--warning); }
.toast-error { border-left-color: var(--error); }

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* --- Emoji Icons (no external dependencies) --- */
.icon-emoji {
  font-size: 28px;
  line-height: 1;
}

.icon-emoji-lg {
  font-size: 48px;
  line-height: 1;
}

/* --- Stat Cards --- */
.stat-card {
  text-align: center;
  padding: var(--space-xl);
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--green-800);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: var(--space-sm);
  font-weight: 500;
}

/* --- Accent stat cards (colour-coded, subtle lift on hover) --- */
.stat-card--accent {
  border-top: 4px solid var(--green-400);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.stat-card--accent:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.stat-card--amber { background: var(--amber-100); border-top-color: var(--amber-500); }
.stat-card--amber .stat-value { color: var(--amber-text); }
.stat-card--green { background: var(--green-50); border-top-color: var(--green-500); }
.stat-card--green .stat-value { color: var(--green-700); }
.stat-card--blue { background: var(--info-bg); border-top-color: var(--info); }
.stat-card--blue .stat-value { color: var(--info-text); }
.stat-card--terracotta { background: #FBEFEA; border-top-color: #C4623F; }
.stat-card--terracotta .stat-value { color: #9C4A2C; }

/* --- Confetti (celebration micro-moments) --- */
.jj-confetti-piece {
  position: fixed;
  z-index: 9999;
  border-radius: 2px;
  pointer-events: none;
  will-change: transform, opacity;
}
@media (prefers-reduced-motion: reduce) {
  .stat-card--accent { transition: none; }
  .stat-card--accent:hover { transform: none; }
}

/* --- Streak / Celebration --- */
.celebration {
  text-align: center;
  padding: var(--space-2xl);
  background: linear-gradient(135deg, var(--green-50), var(--amber-100));
  border-radius: var(--radius-xl);
}

.celebration-emoji {
  font-size: 64px;
  margin-bottom: var(--space-md);
}

.celebration-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 34px;
    --font-size-3xl: 28px;
    --font-size-2xl: 24px;
  }

  .container, .container-narrow, .container-wide {
    padding: 0 var(--space-md);
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .hide-mobile { display: none !important; }
}

@media (max-width: 480px) {
  :root {
    --font-size-4xl: 28px;
    --font-size-3xl: 24px;
    --font-size-2xl: 22px;
  }
}

@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

/* --- Print --- */
@media print {
  body {
    background: white;
    color: black;
    font-size: 14px;
  }

  .no-print { display: none !important; }

  .card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}