:root {
  --bg-deep: #081714;
  --bg-mid: #103227;
  --bg-felt: #16543f;
  --bg-panel: rgba(7, 19, 17, 0.74);
  --bg-panel-strong: rgba(8, 17, 16, 0.92);
  --line-soft: rgba(255, 236, 196, 0.18);
  --line-strong: rgba(255, 226, 150, 0.4);
  --gold: #f0c66e;
  --gold-bright: #ffe5a8;
  --cream: #fff9ec;
  --ink: #072019;
  --text-main: #f7f1df;
  --text-dim: #d7ccb0;
  --good: #75e7a6;
  --bad: #ff8e7a;
  --shadow-lg: 0 22px 60px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.28);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at top, rgba(240, 198, 110, 0.15), transparent 30%),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.08), transparent 25%),
    linear-gradient(160deg, var(--bg-deep), var(--bg-mid) 48%, #07100f 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.02) 0 1px, transparent 1px);
  background-size: 22px 22px, 11px 11px;
  opacity: 0.18;
  pointer-events: none;
}

.site-bar {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 22px 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-link,
.site-nav a {
  color: var(--text-main);
  text-decoration: none;
}

.site-link {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.site-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border: 1px solid rgba(255, 236, 196, 0.18);
  border-radius: 999px;
  background: rgba(7, 19, 17, 0.45);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(255, 226, 150, 0.38);
  background: rgba(255, 236, 196, 0.08);
}

.table-glow {
  position: fixed;
  inset: 7vh 4vw auto;
  height: 48vh;
  border-radius: 999px;
  background:
    radial-gradient(circle at center, rgba(30, 112, 84, 0.85), rgba(12, 42, 33, 0.15) 70%, transparent 78%);
  filter: blur(18px);
  pointer-events: none;
}

.app-shell {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 18px 40px;
}

.hero-panel,
.control-panel,
.selection-panel,
.hand-panel,
.answer-panel,
.mistakes-panel {
  border: 1px solid var(--line-soft);
  background: var(--bg-panel);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 1fr);
  gap: 22px;
  padding: 28px;
  border-radius: var(--radius-xl);
  animation: rise-in 500ms ease-out;
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  font-size: 0.78rem;
}

.hero-copy h1,
.panel-heading h2 {
  margin: 0;
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
}

.hero-copy h1 {
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 0.95;
  max-width: 12ch;
}

.hero-text,
.panel-heading p,
.hand-caption,
.feedback-reason,
.feedback-answer,
.control-label,
.control-group label {
  color: var(--text-dim);
}

.hero-text {
  max-width: 62ch;
  margin: 16px 0 0;
  line-height: 1.6;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 236, 196, 0.14);
  background:
    linear-gradient(160deg, rgba(255, 236, 196, 0.08), rgba(255, 236, 196, 0.02)),
    rgba(4, 12, 11, 0.5);
}

.stat-label {
  display: block;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.stat-card strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.control-panel {
  margin-top: 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  animation: rise-in 650ms ease-out;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.actions-group {
  justify-content: end;
}

.selection-summary {
  margin: 0;
  line-height: 1.5;
  color: var(--text-main);
}

.control-group label,
.control-label {
  font-size: 0.9rem;
}

select,
button {
  font: inherit;
}

select {
  width: 100%;
  padding: 13px 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

select:focus,
button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.segment,
.answer-button,
.secondary-button,
.ghost-button {
  min-height: 48px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.segment {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.segment:hover,
.secondary-button:hover,
.ghost-button:hover,
.answer-button:hover {
  transform: translateY(-1px);
}

.segment.is-active {
  background: linear-gradient(135deg, rgba(240, 198, 110, 0.25), rgba(240, 198, 110, 0.08));
  border-color: rgba(255, 226, 168, 0.4);
  box-shadow: inset 0 0 0 1px rgba(255, 226, 168, 0.1);
}

.secondary-button,
.ghost-button {
  padding: 0 16px;
}

.secondary-button {
  background: linear-gradient(135deg, rgba(240, 198, 110, 0.2), rgba(255, 255, 255, 0.05));
  color: var(--text-main);
  border-color: rgba(255, 226, 168, 0.28);
}

.ghost-button {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  border-color: var(--line-soft);
}

.selection-panel {
  margin-top: 20px;
  padding: 22px;
  border-radius: var(--radius-xl);
  animation: rise-in 720ms ease-out;
}

.selection-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.filter-sections {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.filter-section {
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 236, 196, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.filter-section h3 {
  margin: 0;
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
  font-size: 1.05rem;
}

.filter-chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.filter-chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 236, 196, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  cursor: pointer;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease;
}

.filter-chip:hover {
  transform: translateY(-1px);
}

.filter-chip.is-active {
  border-color: rgba(255, 226, 168, 0.38);
  background: linear-gradient(135deg, rgba(240, 198, 110, 0.22), rgba(255, 255, 255, 0.05));
  color: var(--gold-bright);
}

.filter-chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.trainer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(250px, 320px);
  grid-template-areas:
    "table answers"
    "mistakes mistakes";
  align-items: start;
  gap: 20px;
  margin-top: 20px;
}

.hand-panel {
  grid-area: table;
  border-radius: var(--radius-xl);
  padding: 20px;
  animation: rise-in 780ms ease-out;
  overflow: hidden;
}

.status-strip {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(255, 236, 196, 0.12);
  border: 1px solid rgba(255, 236, 196, 0.18);
  color: var(--gold-bright);
  font-size: 0.88rem;
}

.pill.muted {
  color: var(--text-dim);
}

.deal-layout {
  position: relative;
  display: grid;
  grid-template-rows: auto auto auto auto;
  justify-items: center;
  margin-top: 22px;
  padding: 34px 28px 26px;
  border-radius: 42px 42px 120px 120px;
  border: 1px solid rgba(255, 236, 196, 0.18);
  background:
    radial-gradient(circle at 50% 24%, rgba(255, 230, 162, 0.08), transparent 24%),
    radial-gradient(circle at 50% 120%, rgba(255, 255, 255, 0.06), transparent 38%),
    linear-gradient(180deg, rgba(17, 73, 56, 0.98), rgba(11, 53, 41, 0.98));
  box-shadow:
    inset 0 0 0 2px rgba(255, 226, 168, 0.06),
    inset 0 24px 80px rgba(0, 0, 0, 0.18),
    0 28px 50px rgba(0, 0, 0, 0.22);
}

.deal-layout::before {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 32px 32px 104px 104px;
  border: 2px solid rgba(240, 198, 110, 0.16);
  pointer-events: none;
}

.deal-layout::after {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 20px;
  height: 132px;
  border: 2px solid rgba(255, 226, 168, 0.2);
  border-top: 0;
  border-radius: 0 0 180px 180px;
  opacity: 0.8;
  pointer-events: none;
}

.table-center-mark {
  display: grid;
  justify-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.table-script {
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  font-style: italic;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 234, 182, 0.8);
  text-align: center;
}

.hand-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  width: min(100%, 560px);
  position: relative;
}

.dealer-block {
  padding-top: 8px;
}

.player-block {
  padding-top: 18px;
}

.hand-label,
.prompt-text {
  margin: 0;
}

.hand-label {
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.hand-caption {
  text-align: center;
}

.card-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.dealer-block .card-row .card:nth-child(1) {
  --card-tilt: -6deg;
}

.dealer-block .card-row .card:nth-child(2) {
  --card-tilt: 6deg;
  --card-shift: 4px;
}

.player-block .card-row .card:nth-child(1) {
  --card-tilt: -4deg;
}

.player-block .card-row .card:nth-child(2) {
  --card-tilt: 5deg;
  --card-shift: -6px;
}

.card {
  --card-tilt: 0deg;
  --card-shift: 0px;
  width: 94px;
  min-height: 128px;
  padding: 14px;
  border-radius: 18px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.96), rgba(244, 235, 213, 0.96));
  color: var(--ink);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transform-origin: bottom center;
  animation: deal-in 280ms ease-out both;
}

.card::after {
  content: "";
  position: absolute;
  inset: auto -18px -24px auto;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(240, 198, 110, 0.48), transparent 72%);
}

.card-rank {
  display: block;
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
  font-size: 2.2rem;
  font-weight: 700;
}

.card-name {
  display: block;
  margin-top: 6px;
  font-size: 0.9rem;
  color: rgba(7, 32, 25, 0.72);
}

.seat-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 226, 168, 0.28);
  background: linear-gradient(135deg, rgba(12, 36, 29, 0.85), rgba(255, 255, 255, 0.04));
  color: var(--gold-bright);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.player-badge {
  margin-top: 4px;
}

.table-divider {
  width: min(100%, 560px);
  height: 1px;
  margin: 18px 0 12px;
  background: linear-gradient(90deg, transparent, rgba(255, 226, 168, 0.45), transparent);
}

.versus-chip {
  min-width: 118px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(255, 236, 196, 0.28);
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.03));
  color: var(--gold-bright);
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
}

.question-box {
  margin-top: 24px;
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 236, 196, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.prompt-text {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.35;
}

.answer-panel {
  grid-area: answers;
  display: grid;
  align-content: start;
  gap: 16px;
  padding: 18px;
  border-radius: var(--radius-xl);
  position: sticky;
  top: 18px;
  animation: rise-in 820ms ease-out;
}

.answer-panel .question-box,
.answer-panel .feedback-panel {
  margin-top: 0;
}

.answer-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 0;
}

.answer-button {
  padding: 16px;
  border-color: rgba(255, 236, 196, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  text-align: left;
}

.answer-button span {
  display: block;
}

.answer-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.answer-shortcut {
  margin-top: 6px;
  font-size: 0.84rem;
  color: var(--text-dim);
}

.answer-button.is-disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
}

.answer-button.is-right {
  background: rgba(117, 231, 166, 0.14);
  border-color: rgba(117, 231, 166, 0.45);
}

.answer-button.is-wrong {
  background: rgba(255, 142, 122, 0.12);
  border-color: rgba(255, 142, 122, 0.4);
}

.feedback-panel {
  margin-top: 18px;
  padding: 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 236, 196, 0.12);
}

.feedback-panel.is-hidden {
  display: none;
}

.feedback-result {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.feedback-result.is-correct {
  color: var(--good);
}

.feedback-result.is-wrong {
  color: var(--bad);
}

.feedback-answer,
.feedback-reason {
  line-height: 1.55;
}

.mistakes-panel {
  grid-area: mistakes;
  border-radius: var(--radius-xl);
  padding: 22px;
}

.panel-heading p {
  margin: 8px 0 0;
}

.mistakes-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.mistake-card,
.empty-card {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 236, 196, 0.12);
}

.mistake-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1rem;
}

.mistake-card p,
.mistake-card small,
.empty-card p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.5;
}

.mistake-card small {
  display: block;
  margin-top: 8px;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes deal-in {
  from {
    opacity: 0;
    transform: translateY(calc(16px + var(--card-shift))) rotate(calc(var(--card-tilt) - 3deg)) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(var(--card-shift)) rotate(var(--card-tilt)) scale(1);
  }
}

@media (max-width: 1080px) {
  .site-bar {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero-panel,
  .trainer-grid,
  .control-panel,
  .filter-sections {
    grid-template-columns: 1fr;
  }

  .trainer-grid {
    grid-template-areas:
      "table"
      "answers"
      "mistakes";
  }

  .actions-group {
    justify-content: start;
  }

  .deal-layout {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    padding: 24px 18px 22px;
    border-radius: 30px 30px 80px 80px;
  }

  .deal-layout::after {
    left: 8%;
    right: 8%;
    height: 92px;
  }

  .hand-block,
  .dealer-block,
  .player-block {
    width: 100%;
  }

  .card-row {
    justify-content: center;
  }

  .answer-panel {
    padding: 18px;
    position: static;
  }

  .answer-buttons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-nav {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-nav a {
    justify-content: center;
  }

  .app-shell {
    padding: 16px 14px 28px;
  }

  .hero-panel,
  .selection-panel,
  .hand-panel,
  .answer-panel,
  .mistakes-panel {
    padding: 18px;
  }

  .answer-buttons,
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .card {
    width: 78px;
    min-height: 112px;
  }
}