:root {
  --paper: #e8f0fb;
  --paper-strong: #f8fbff;
  --ink: #12233d;
  --curtain: #1e5aa7;
  --curtain-deep: #143b77;
  --gold: #2f73c9;
  --gold-soft: #cfe1fb;
  --shadow: rgba(17, 45, 89, 0.16);
  --line: rgba(30, 90, 167, 0.18);
  --line-strong: rgba(30, 90, 167, 0.34);
  --select-arrow: #2359ab;
  --ui: "Gill Sans", "Trebuchet MS", sans-serif;
  --display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--ui);
  background:
    radial-gradient(circle at top, rgba(247, 251, 255, 0.96), rgba(232, 240, 251, 0.88) 34%, rgba(163, 196, 244, 0.42) 60%, rgba(30, 90, 167, 0.16) 100%),
    linear-gradient(135deg, #f4f9ff 0%, #deecff 46%, #bdd6fb 100%);
}

.page-shell {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  display: grid;
  gap: 1.5rem;
}

.hero-panel,
.control-panel,
.stage-panel {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  background: rgba(248, 251, 255, 0.88);
  border: 1px solid var(--line);
  box-shadow: 0 22px 60px var(--shadow);
}

.hero-panel {
  padding: 1.5rem 1.7rem 1.65rem;
  background:
    linear-gradient(120deg, rgba(30, 90, 167, 0.98), rgba(20, 59, 119, 0.96)),
    var(--curtain);
  color: #f6fbff;
}

.hero-top {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: auto -8% -30% auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(173, 212, 255, 0.44), rgba(173, 212, 255, 0));
}

.card-badge,
.meta-label {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
}

.language-switcher {
  position: relative;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: auto;
  padding: 0.3rem;
  border-radius: 999px;
  background: rgba(255, 248, 238, 0.12);
  border: 1px solid rgba(255, 248, 238, 0.16);
  backdrop-filter: blur(8px);
}

.language-flag {
  position: relative;
  z-index: 4;
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.65rem;
  height: 2.25rem;
  padding: 0 0.7rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #fff7eb;
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.7;
  box-shadow: none;
}

.language-flag:hover:not(:disabled) {
  transform: none;
  opacity: 1;
}

.language-flag[aria-pressed="true"] {
  background: rgba(255, 248, 238, 0.22);
  opacity: 1;
  box-shadow: inset 0 0 0 1px rgba(255, 248, 238, 0.12);
}

.hero-panel h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.95;
  letter-spacing: 0.01em;
}

.intro {
  width: min(60ch, 100%);
  margin: 0.7rem 0 0;
  font-size: 1.05rem;
  line-height: 1.5;
  color: rgba(246, 251, 255, 0.88);
}

.control-panel,
.stage-panel {
  padding: 1.4rem;
}

.field-grid {
  display: grid;
  grid-template-columns: 2fr 2fr minmax(110px, 0.8fr) auto;
  gap: 0.9rem;
  align-items: end;
}

.field {
  display: grid;
  gap: 0.45rem;
  font-size: 0.95rem;
}

.field span {
  font-weight: 700;
}

select,
input,
button {
  font: inherit;
}

select,
input {
  appearance: none;
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--paper-strong);
  color: var(--ink);
  padding: 0.9rem 1rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

select {
  padding-right: 3rem;
  border-color: var(--line-strong);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--select-arrow) 50%),
    linear-gradient(135deg, var(--select-arrow) 50%, transparent 50%),
    linear-gradient(180deg, rgba(47, 115, 201, 0.14), rgba(47, 115, 201, 0.14));
  background-position:
    calc(100% - 20px) calc(50% - 3px),
    calc(100% - 14px) calc(50% - 3px),
    calc(100% - 2.8rem) 50%;
  background-size:
    7px 7px,
    7px 7px,
    1px 62%;
  background-repeat: no-repeat;
}

.field-select select {
  background-color: #eef5ff;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.86),
    0 0 0 1px rgba(47, 115, 201, 0.04);
}

input {
  background-color: #fbfdff;
}

input:focus,
select:focus,
button:focus {
  outline: 3px solid rgba(47, 115, 201, 0.24);
  outline-offset: 2px;
}

.primary-button,
.secondary-button {
  border: 0;
  border-radius: 999px;
  padding: 0.95rem 1.3rem;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.primary-button {
  background: linear-gradient(135deg, var(--curtain), var(--curtain-deep));
  color: #f7fbff;
  box-shadow: 0 10px 22px rgba(20, 59, 119, 0.24);
}

.secondary-button {
  background: linear-gradient(135deg, var(--gold-soft), #dbe9ff);
  color: #15345f;
  box-shadow: 0 10px 20px rgba(47, 115, 201, 0.18);
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.status-text {
  margin: 1rem 0 0;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  background: rgba(30, 90, 167, 0.07);
}

.status-text[data-mode="error"] {
  background: rgba(196, 58, 85, 0.14);
}

.status-text[data-mode="warning"] {
  background: rgba(60, 121, 201, 0.14);
}

.status-text[data-mode="ready"] {
  background: rgba(59, 135, 222, 0.16);
}

.stage-panel {
  display: grid;
  gap: 1.2rem;
}

.stage-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.stage-meta > div {
  padding: 0.9rem 1rem;
  border-radius: 18px;
  background: rgba(239, 246, 255, 0.94);
  border: 1px solid rgba(30, 90, 167, 0.12);
}

.stage-meta strong {
  display: block;
  margin-top: 0.2rem;
  font-size: 1rem;
}

.cards-root {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.cue-card,
.answer-card {
  padding: 1.15rem 1.25rem;
  border-radius: 26px;
  background:
    linear-gradient(180deg, rgba(252, 253, 255, 0.98), rgba(235, 244, 255, 0.95));
  border: 1px solid rgba(30, 90, 167, 0.14);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}

.cue-card {
  position: relative;
  min-height: 150px;
}

.cue-card::before {
  content: "";
  position: absolute;
  inset: 16px 16px auto auto;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(112, 175, 255, 0.72), rgba(112, 175, 255, 0));
}

.answer-card {
  opacity: 0;
  transform: translateY(16px);
  max-height: 0;
  overflow: hidden;
  transition: opacity 220ms ease, transform 220ms ease, max-height 220ms ease;
}

.cards-root[data-phase="answer"] .answer-card {
  opacity: 1;
  transform: translateY(0);
  max-height: 420px;
}

.card-from {
  margin: 0.28rem 0 0.5rem;
  color: rgba(18, 35, 61, 0.62);
  font-size: 0.95rem;
}

.card-text {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.35rem, 2vw, 2.1rem);
  line-height: 1.22;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.keyboard-hint {
  margin: 0;
  color: rgba(31, 26, 23, 0.72);
}

kbd {
  display: inline-block;
  padding: 0.16rem 0.46rem;
  border-radius: 8px;
  background: #f2f8ff;
  border: 1px solid rgba(30, 90, 167, 0.16);
  box-shadow: inset 0 -2px 0 rgba(30, 90, 167, 0.08);
}

@media (max-width: 860px) {
  .hero-top {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .language-switcher {
    align-self: flex-start;
  }

  .field-grid,
  .stage-meta {
    grid-template-columns: 1fr;
  }

  .page-shell {
    width: min(100% - 1rem, 1100px);
    padding-top: 1rem;
  }

  .hero-panel,
  .control-panel,
  .stage-panel {
    border-radius: 22px;
  }

  .card-text {
    font-size: 1.25rem;
  }
}