/* ============================================================
   Horse Racing Handicapper — Design System
   Matches justinwender.com (Inter, Slate dark theme, Green accent)
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --bg:          #0F172A;
  --bg-dark:     #020617;
  --surface:     #1E293B;
  --surface2:    #334155;
  --border:      #334155;
  --text:        #F9FAFB;
  --text-secondary: #D1D5DB;
  --text-muted:  #94A3B8;

  /* Accent */
  --green:       #4ADE80;
  --green-dark:  #10B981;
  --green-bg:    rgba(74, 222, 128, 0.10);
  --purple:      #818CF8;
  --purple-bg:   rgba(129, 140, 248, 0.10);

  /* Functional */
  --value:       #4ADE80;
  --value-bg:    rgba(74, 222, 128, 0.10);
  --watch:       #FBBF24;
  --watch-bg:    rgba(251, 191, 36, 0.10);
  --danger:      #F87171;
  --danger-bg:   rgba(248, 113, 113, 0.10);

  /* Sizes */
  --radius:      0.5rem;
  --radius-sm:   0.375rem;
  --container:   72rem;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: linear-gradient(to bottom, transparent, var(--bg)) var(--bg-dark);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--green); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--green-dark); }

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.80);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}
.header .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s;
}
.header .logo:hover { color: var(--green); }
.header .logo span { color: var(--green); }

/* Desktop nav */
.nav-desktop {
  display: flex;
  gap: 2rem;
}
.nav-desktop a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
  padding: 0.25rem 0;
}
.nav-desktop a:hover { color: var(--text); }
.nav-desktop a.active { color: var(--green); }

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 1.5rem;
  line-height: 1;
}
.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem 2rem 1rem;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.15s;
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover { color: var(--text); }
.nav-mobile a.active { color: var(--green); }

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: block; }
  .header { padding: 0 1rem; }
  .nav-mobile { padding: 0.5rem 1rem 1rem; }
}

/* --- Main Container --- */
.main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.5rem 2rem;
}
@media (max-width: 768px) {
  .main { padding: 1rem; }
}

/* --- Page Title --- */
.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.page-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* --- Card --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: box-shadow 0.2s;
}
.card h2 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
  line-height: 1.4;
}
.btn-primary {
  background: var(--green);
  color: #fff;
}
.btn-primary:hover { background: var(--green-dark); color: #fff; }
.btn-secondary {
  background: var(--surface2);
  color: var(--text);
}
.btn-secondary:hover { background: #475569; color: var(--text); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: var(--surface); }
.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
}
.btn-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* --- Forms --- */
.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}
input[type="text"], input[type="date"], input[type="number"],
input[type="file"], textarea, select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.625rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  width: 100%;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(74, 222, 128, 0.15);
}
select { cursor: pointer; }
textarea { resize: vertical; min-height: 100px; }
.form-row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.form-field input, .form-field select {
  width: auto;
  min-width: 120px;
}

/* --- Tables --- */
.table-wrap {
  overflow-x: auto;
  margin-top: 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}
th, td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
}
th {
  background: var(--bg-dark);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  position: sticky;
  top: 0;
}
th a { color: var(--text-secondary); }
th a:hover { color: var(--green); }
tr:hover { background: rgba(74, 222, 128, 0.03); }

/* --- Stats Grid --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.stat-box {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}
.stat-box .label {
  color: var(--text-muted);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.stat-box .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green);
}

/* --- Signals / Badges --- */
.signal-value {
  background: var(--value-bg);
  color: var(--value);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
}
.signal-watch {
  background: var(--watch-bg);
  color: var(--watch);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
}
.signal-pass {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  background: var(--surface2);
  color: var(--text-muted);
}

.edge-pos { color: var(--value); }
.edge-neg { color: var(--text-muted); }

/* --- Pill / Tag --- */
.pill {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  background: var(--bg-dark);
  color: var(--text-secondary);
}

/* --- Probability bar --- */
.prob-bar {
  display: inline-block;
  height: 6px;
  border-radius: 3px;
  background: var(--green);
  vertical-align: middle;
}

/* --- Summary Bar --- */
.summary-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  padding: 1rem 1.25rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}
.summary-bar .stat {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.summary-bar .stat-label { color: var(--text-muted); font-size: 0.8125rem; }
.summary-bar .stat-num { font-weight: 700; }
.summary-bar .val-count { color: var(--value); }
.summary-bar .watch-count { color: var(--watch); }

/* --- Race Pills --- */
.race-pills-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  white-space: nowrap;
  padding: 0.5rem 0;
  margin-bottom: 1rem;
}
.race-pills-wrap::-webkit-scrollbar { height: 3px; }
.race-pills-wrap::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.race-pill {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  margin-right: 0.375rem;
  min-width: 3rem;
  text-align: center;
  transition: border-color 0.15s, color 0.15s;
}
.race-pill:hover { border-color: var(--green); color: var(--text); }
.race-pill.has-value { border-color: var(--value); color: var(--value); }

/* --- Horse Cards --- */
.horse-card {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem;
  margin-bottom: 0.5rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.horse-card.value-card {
  border-left: 3px solid var(--value);
  background: var(--value-bg);
}
.horse-card.watch-card {
  border-left: 3px solid var(--watch);
  background: var(--watch-bg);
}
.horse-card.scratched-card {
  opacity: 0.35;
  border-color: var(--border);
  background: var(--bg-dark);
}
.horse-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.375rem;
}
.horse-header .prog-num {
  background: var(--surface2);
  color: var(--text);
  font-weight: 700;
  font-size: 0.875rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.horse-header .horse-name {
  font-weight: 600;
  font-size: 0.875rem;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.horse-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}
.horse-stats .stat-item { white-space: nowrap; }
.horse-stats .stat-item strong { color: var(--text); }
.horse-signals {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
  align-items: center;
}
.horse-signals .action-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  flex: 1;
}

@media (min-width: 768px) {
  .horse-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.875rem;
    align-items: center;
  }
  .horse-header { margin-bottom: 0; }
  .horse-stats { margin-bottom: 0; }
}

/* --- Exotic Rows --- */
.exotic-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.625rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.8125rem;
}
.exotic-row:last-child { border-bottom: none; }
.exotic-finish { font-weight: 600; min-width: 100px; }
.exotic-prob { color: var(--text-muted); }
.exotic-pay { color: var(--text); }
.exotic-ev { font-weight: 600; }
.exotic-ev.pos { color: var(--value); }
.exotic-ev.neg { color: var(--text-muted); }

/* --- Ticket Recommendations --- */
.ticket-rec {
  background: var(--value-bg);
  border: 1px solid var(--value);
  border-radius: var(--radius);
  padding: 0.625rem 0.875rem;
  margin-bottom: 0.375rem;
  font-size: 0.8125rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ticket-rec .ticket-label { font-weight: 600; }
.ticket-rec .ticket-wager { color: var(--text-muted); }

/* --- Multi-Race Ticket --- */
.multi-ticket {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem;
  margin-bottom: 0.5rem;
  font-size: 0.8125rem;
}
.multi-ticket .ticket-header { font-weight: 600; margin-bottom: 0.25rem; }
.multi-ticket .ticket-leg { color: var(--text-muted); padding: 0.125rem 0; }
.multi-ticket .ticket-summary {
  margin-top: 0.375rem;
  padding-top: 0.375rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --- Live Adjustment Controls --- */
.adj-controls {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.adj-horse-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0;
  min-height: 2.75rem;
}
.scratch-btn {
  background: var(--bg-dark);
  border: 2px solid var(--border);
  color: var(--text-muted);
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.15s, background 0.15s;
}
.scratch-btn:hover { border-color: var(--green); }
.scratch-btn.scratched {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.adj-horse-name {
  font-size: 0.875rem;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.adj-horse-name.scratched { text-decoration: line-through; color: var(--text-muted); }
.odds-input {
  width: 4rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-family: inherit;
  text-align: center;
}
.odds-input:focus { border-color: var(--green); outline: none; }
.off-turf-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  border-top: 1px solid var(--border);
}
.off-turf-btn {
  background: var(--bg-dark);
  border: 2px solid var(--border);
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.875rem;
  font-family: inherit;
  min-height: 2.75rem;
  transition: border-color 0.15s, background 0.15s;
}
.off-turf-btn:hover { border-color: var(--watch); }
.off-turf-btn.active {
  background: var(--watch);
  border-color: var(--watch);
  color: #000;
  font-weight: 600;
}
.adj-log {
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-dark);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .adj-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }
}

/* --- Section details/summary --- */
details { margin-bottom: 0.5rem; }
summary {
  cursor: pointer;
  padding: 0.625rem 0.75rem;
  background: var(--bg-dark);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: background 0.15s;
}
summary:hover { background: var(--surface2); }
.section-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

/* --- Animations --- */
.newly-value { animation: pulse-green 1s ease; }
@keyframes pulse-green {
  0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* --- Alerts --- */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.875rem;
  border: 1px solid;
}
.alert-error {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger);
}
.alert-success {
  background: var(--value-bg);
  border-color: var(--value);
  color: var(--value);
}
.alert-info {
  background: var(--purple-bg);
  border-color: var(--purple);
  color: var(--purple);
}

/* --- Upload Zone --- */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  transition: border-color 0.2s;
}
.upload-zone:hover { border-color: var(--green); }

/* --- Info text --- */
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-sm { font-size: 0.8125rem; }
.text-xs { font-size: 0.75rem; }

/* --- Explorer extras --- */
.table-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem;
}
.table-card {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.table-card:hover {
  border-color: var(--green);
  box-shadow: 0 4px 12px rgba(74, 222, 128, 0.05);
}
.table-card .name { font-weight: 600; font-size: 0.9375rem; }
.table-card .count { color: var(--text-muted); font-size: 0.8125rem; margin-top: 0.125rem; }

/* Pagination */
.pagination { display: flex; gap: 0.5rem; align-items: center; margin-top: 0.75rem; }
.pagination a, .pagination span {
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
}
.pagination a { background: var(--surface); color: var(--text-secondary); text-decoration: none; }
.pagination a:hover { background: var(--green); color: #fff; }
.pagination .current { background: var(--green); color: #fff; }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.feature-item {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.625rem 0.875rem;
  font-size: 0.8125rem;
}
.feature-item .fname { font-weight: 600; color: var(--green); }
.feature-item .fcat { color: var(--text-muted); font-size: 0.75rem; }

/* Bar chart */
.bar-container {
  background: var(--bg-dark);
  border-radius: 3px;
  height: 8px;
  width: 100px;
  display: inline-block;
  vertical-align: middle;
}
.bar-fill {
  background: var(--green);
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s;
}
.bar-fill.low { background: var(--green); }
.bar-fill.medium { background: var(--watch); }
.bar-fill.high { background: var(--danger); }

/* Importance bar */
.importance-bar {
  background: var(--bg-dark);
  border-radius: 3px;
  height: 8px;
  width: 200px;
  display: inline-block;
  vertical-align: middle;
}
.importance-bar .fill {
  height: 100%;
  border-radius: 3px;
}
.importance-bar .fill-green { background: var(--green); }
.importance-bar .fill-purple { background: var(--purple); }

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  margin-top: 2rem;
  text-align: center;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.footer p {
  color: var(--text-muted);
  font-size: 0.8125rem;
}
.footer a { color: var(--text-secondary); }
.footer a:hover { color: var(--green); }

/* --- Utility --- */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 0.5rem; }
.gap-md { gap: 1rem; }
.mt-sm { margin-top: 0.5rem; }
.mt-md { margin-top: 1rem; }
.mb-sm { margin-bottom: 0.5rem; }
.mb-md { margin-bottom: 1rem; }