/* ═══════════════════════════════════════════════════════════════════════
   Pickleball Shot Breakdown — Main Stylesheet
   Mobile-first, CSS custom properties, no frameworks
   ═══════════════════════════════════════════════════════════════════════ */

/* ── CSS Variables ───────────────────────────────────────────────────── */
:root {
  --color-primary:        #1a5632;
  --color-primary-dark:   #0f3320;
  --color-primary-light:  #e8f5e9;
  --color-accent:         #f9a825;
  --color-accent-dark:    #e65100;
  --color-strength:       #2e7d32;
  --color-strength-bg:    #e8f5e9;
  --color-weakness:       #c62828;
  --color-weakness-bg:    #ffebee;
  --color-neutral:        #757575;
  --color-neutral-bg:     #f5f5f5;
  --color-bg:             #f0f4f1;
  --color-card:           #ffffff;
  --color-border:         #e0e0e0;
  --color-text:           #212121;
  --color-text-secondary: #616161;
  --color-text-muted:     #9e9e9e;

  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-full: 999px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 12px rgba(0,0,0,.12), 0 2px 4px rgba(0,0,0,.08);
  --shadow-lg:  0 10px 30px rgba(0,0,0,.15), 0 4px 8px rgba(0,0,0,.08);

  --transition: 200ms ease;
  --font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
                Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.5;
}

img { display: block; max-width: 100%; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
a { color: var(--color-primary); }

/* ── Utility ─────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.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;
}

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), box-shadow var(--transition),
              transform var(--transition);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-sm); }

.btn-secondary {
  background: var(--color-neutral-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: #e0e0e0; }

.btn-accent {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}
.btn-accent:hover { background: #f0c030; box-shadow: var(--shadow-sm); }

.btn-ghost {
  background: transparent;
  color: rgba(255,255,255,.85);
  border: 1px solid rgba(255,255,255,.3);
}
.btn-ghost:hover { background: rgba(255,255,255,.15); }

.btn-sm { padding: 6px 12px; font-size: .8rem; }

/* ── Card ────────────────────────────────────────────────────────────── */
.card {
  background: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

/* ═══════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════ */
.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.header-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -.3px;
  white-space: nowrap;
}
.header-tagline {
  font-size: .78rem;
  opacity: .75;
  margin-top: 2px;
}

/* Auth section */
.auth-section { flex-shrink: 0; }

.auth-signin {
  display: flex;
  align-items: center;
  gap: 12px;
}
.signin-prompt {
  font-size: .85rem;
  opacity: .8;
}

.auth-user {
  display: flex;
  align-items: center;
  gap: 10px;
}
/* An explicit display value overrides the hidden attribute, so restore it. */
.auth-signin[hidden],
.auth-user[hidden] { display: none; }

.user-avatar {
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255,255,255,.4);
  object-fit: cover;
}

.user-meta {
  display: flex;
  flex-direction: column;
}
.user-name  { font-size: .875rem; font-weight: 600; }
.user-email { font-size: .72rem; opacity: .7; }

/* ═══════════════════════════════════════════════════
   LOADING OVERLAY
   ═══════════════════════════════════════════════════ */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.loading-overlay[hidden] { display: none; }

.spinner {
  width: 44px; height: 44px;
  border: 4px solid var(--color-primary-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-text { color: var(--color-primary); font-weight: 600; }

/* ═══════════════════════════════════════════════════
   DASHBOARD LAYOUT
   ═══════════════════════════════════════════════════ */
.dashboard {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ═══════════════════════════════════════════════════
   PROFILE CARD
   ═══════════════════════════════════════════════════ */
.profile-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  flex-wrap: wrap;
}

.profile-avatar {
  width: 72px; height: 72px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--color-primary-light);
  flex-shrink: 0;
}

.profile-info {
  flex: 1;
  min-width: 150px;
}
.profile-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}
.profile-stats {
  display: flex;
  gap: 24px;
  margin-top: 8px;
}
.stat-item {
  display: flex;
  align-items: baseline;
  gap: 5px;
}
.stat-label {
  font-size: .78rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.stat-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
}
.stat-total {
  font-size: .9rem;
  color: var(--color-text-muted);
}

.profile-dupr-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.dupr-display {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.dupr-label {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--color-text-secondary);
}
.dupr-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

/* ═══════════════════════════════════════════════════
   INSIGHTS ROW
   ═══════════════════════════════════════════════════ */
.insights-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.insight-card {
  padding: 20px;
}

.insight-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.insight-icon { font-size: 1.3rem; }
.insight-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.insight-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.insight-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  transition: background var(--transition);
}
.insight-item:hover { background: var(--color-border); }
.insight-item-clickable { cursor: pointer; }
.insight-item-clickable:active { background: var(--color-primary-light); }
.insight-item-clickable:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.insight-item-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}
.insight-shot-name {
  font-size: .875rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.insight-cat-name {
  font-size: .72rem;
  color: var(--color-text-muted);
}

.insight-badges {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.insight-rating {
  font-size: .85rem;
  font-weight: 700;
  color: var(--color-text-secondary);
}

.diff-badge {
  font-size: .75rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
}
.diff-badge.strength {
  background: var(--color-strength-bg);
  color: var(--color-strength);
}
.diff-badge.weakness {
  background: var(--color-weakness-bg);
  color: var(--color-weakness);
}

.insight-empty {
  font-size: .85rem;
  color: var(--color-text-muted);
  font-style: italic;
  padding: 8px 0;
}

/* ═══════════════════════════════════════════════════
   CATEGORIES SECTION
   ═══════════════════════════════════════════════════ */
.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 14px;
}

.categories-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.categories-placeholder {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
}

/* Category card */
.category-card {
  background: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.category-card:hover { box-shadow: var(--shadow-md); }

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
  gap: 12px;
  transition: background var(--transition);
}
.category-header:hover { background: var(--color-primary-light); }
.category-header:active { background: #d5ead7; }

.category-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.category-name {
  font-size: .975rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.category-avg-badge {
  font-size: .8rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
  flex-shrink: 0;
}
.category-avg-badge.no-rating {
  background: var(--color-neutral-bg);
  color: var(--color-neutral);
}

.category-meta {
  font-size: .78rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.category-chevron {
  font-size: .75rem;
  color: var(--color-text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.category-card.expanded .category-chevron { transform: rotate(180deg); }

/* Shots body (collapsible) */
.category-body {
  display: none;
  border-top: 1px solid var(--color-border);
}
.category-card.expanded .category-body { display: block; }

.shots-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.shot-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  cursor: pointer;
  gap: 12px;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}
.shot-row:last-child { border-bottom: none; }
.shot-row:hover { background: #fafafa; }
.shot-row:active { background: var(--color-primary-light); }

.shot-name {
  font-size: .875rem;
  color: var(--color-text);
  flex: 1;
  min-width: 0;
}

/* Rating badge on shot row */
.rating-badge {
  font-size: .8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  min-width: 52px;
  text-align: center;
  transition: background var(--transition), color var(--transition);
}
.rating-badge.strength {
  background: var(--color-strength-bg);
  color: var(--color-strength);
}
.rating-badge.weakness {
  background: var(--color-weakness-bg);
  color: var(--color-weakness);
}
.rating-badge.neutral {
  background: var(--color-neutral-bg);
  color: var(--color-neutral);
}
.rating-badge.not-rated {
  background: transparent;
  color: var(--color-text-muted);
  border: 1.5px dashed var(--color-border);
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════
   MODAL
   ═══════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(3px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 180ms ease forwards;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-overlay[hidden] { display: none; }

.modal-box {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: scaleIn 180ms ease forwards;
}
.modal-box--sm { max-width: 360px; }

@keyframes scaleIn {
  from { transform: scale(.94); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 14px; right: 16px;
  background: var(--color-neutral-bg);
  border: none;
  width: 30px; height: 30px;
  border-radius: var(--radius-full);
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition);
  z-index: 1;
}
.modal-close:hover { background: #e0e0e0; color: var(--color-text); }

.modal-header {
  padding: 24px 24px 0;
}
.modal-category-label {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 3px 9px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}
.modal-shot-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
}
.modal-subtitle {
  margin-top: 6px;
  font-size: .875rem;
  color: var(--color-text-secondary);
}


.modal-body { padding: 20px 24px; }

/* Rating display inside modal */
.modal-rating-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 24px;
}
.modal-rating-label {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--color-text-secondary);
}
.modal-rating-value {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  transition: color var(--transition);
}

/* Slider group */
.slider-group {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.slider-min, .slider-max {
  font-size: .8rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* Custom range slider */
.rating-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  outline: none;
  transition: background var(--transition);
}
.rating-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,.2);
  transition: transform var(--transition), box-shadow var(--transition);
}
.rating-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 3px 10px rgba(26,86,50,.35);
}
.rating-slider::-moz-range-thumb {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 6px rgba(0,0,0,.2);
}

/* Number input */
.number-input-group {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}
.rating-number-input {
  width: 90px;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  padding: 8px 12px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font);
  transition: border-color var(--transition);
  -moz-appearance: textfield;
}
.rating-number-input::-webkit-outer-spin-button,
.rating-number-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.rating-number-input:focus {
  outline: none;
  border-color: var(--color-primary);
}
.rating-number-input--lg {
  width: 120px;
  font-size: 1.4rem;
}

.dupr-input-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.input-label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* Rating history */
.rating-history { margin-top: 4px; }
.history-title {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}
.history-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: .82rem;
}
.history-date { color: var(--color-text-muted); }
.history-rating { font-weight: 700; color: var(--color-primary); }
.history-empty {
  font-size: .82rem;
  color: var(--color-text-muted);
  font-style: italic;
  text-align: center;
  padding: 8px 0;
}

/* Modal footer */
.modal-footer {
  padding: 16px 24px 24px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  border-top: 1px solid var(--color-border);
}

/* ═══════════════════════════════════════════════════
   CHARTS SECTION
   ═══════════════════════════════════════════════════ */
.charts-section { /* uses dashboard gap for spacing */ }
.charts-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.chart-card { padding: 20px; }
.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.chart-title { font-size: 1rem; font-weight: 700; color: var(--color-text); }
.chart-container { position: relative; width: 100%; }
.chart-container--radar { max-height: 550px; }
.chart-container--line  { max-height: 300px; }
.snapshot-controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.snapshot-select {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-family: var(--font);
  background: var(--color-card);
  color: var(--color-text);
  max-width: 200px;
}

/* Landing Page */
.landing-page {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.landing-hero {
  text-align: center;
  padding: 40px 20px 48px;
}
.landing-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.15;
  margin-bottom: 16px;
}
.landing-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.6;
}
.landing-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.landing-cta-note {
  font-size: .82rem;
  color: var(--color-text-muted);
}

.landing-preview {
  margin-top: 24px;
}
.landing-preview-label {
  text-align: center;
  font-size: .85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.landing-demo-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}
.landing-demo-card {
  padding: 20px;
}

.landing-radar-card {
  padding: 24px;
  max-width: 700px;
  margin: 0 auto 32px;
}


/* Responsive landing */
@media (max-width: 768px) {
  .landing-title { font-size: 1.8rem; }
  .landing-demo-row { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .landing-title { font-size: 1.5rem; }
  .landing-subtitle { font-size: 1rem; }
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE — 768px
   ═══════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .header-inner {
    padding: 12px 16px;
  }
  .header-title { font-size: 1.1rem; }

  .dashboard { padding: 16px 14px 40px; gap: 16px; }

  .insights-section {
    grid-template-columns: 1fr;
  }

  .profile-card { gap: 14px; padding: 18px; }
  .dupr-number  { font-size: 2.5rem; }
  .profile-avatar { width: 56px; height: 56px; }

  .rating-slider::-webkit-slider-thumb { width: 30px; height: 30px; }
  .rating-slider::-moz-range-thumb     { width: 30px; height: 30px; }
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE — 480px
   ═══════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .signin-prompt { display: none; }
  .user-meta     { display: none; }

  .profile-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .profile-dupr-wrap {
    margin-left: 0;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }

  .category-header { padding: 12px 14px; }
  .shot-row        { padding: 10px 14px; }

  .modal-box { border-radius: var(--radius-md); }
  .modal-header, .modal-body { padding-left: 18px; padding-right: 18px; }
  .modal-footer { padding: 14px 18px 18px; }
}