:root {
  --azul-900: #082f49;
  --azul-800: #0c4a6e;
  --azul-700: #0369a1;
  --azul-600: #0284c7;
  --azul-500: #0ea5e9;
  --azul-100: #e0f2fe;
  --branco: #ffffff;
  --cinza-50: #f8fafc;
  --cinza-100: #f1f5f9;
  --cinza-200: #e2e8f0;
  --cinza-400: #94a3b8;
  --cinza-600: #475569;
  --cinza-700: #334155;
  --cinza-900: #0f172a;
  --verde: #16a34a;
  --vermelho: #dc2626;
  --amarelo: #eab308;
  --alternativa-a: #dc2626;
  --alternativa-b: #2563eb;
  --alternativa-c: #d97706;
  --alternativa-d: #16a34a;
  --sombra: 0 18px 45px rgba(15, 23, 42, 0.16);
  --raio: 22px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--cinza-900);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.2), transparent 35%),
    linear-gradient(145deg, #f8fafc, #e0f2fe);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.hidden {
  display: none !important;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0;
}

.page-shell--participant {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.page-shell--screen {
  width: min(1500px, calc(100% - 48px));
  min-height: 100vh;
}

.page-shell--admin {
  width: min(1280px, calc(100% - 32px));
}

.card {
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: var(--raio);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--sombra);
}

.card__body {
  padding: 28px;
}

.participant-card {
  width: min(560px, 100%);
  overflow: hidden;
}

.brand-header {
  padding: 30px 28px;
  color: var(--branco);
  text-align: center;
  background:
    linear-gradient(135deg, rgba(8, 47, 73, 0.98), rgba(2, 132, 199, 0.96));
}

.brand-header h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.2rem);
  letter-spacing: -0.04em;
}

.brand-header p {
  margin: 10px 0 0;
  color: var(--azul-100);
  font-size: 1.05rem;
}

.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 68px;
  height: 68px;
  margin-bottom: 15px;
  border: 2px solid rgba(255, 255, 255, 0.62);
  border-radius: 20px;
  font-size: 1.65rem;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.13);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(1.45rem, 4vw, 2rem);
}

h3 {
  margin: 0 0 10px;
}

.subtitle,
.muted {
  color: var(--cinza-600);
}

.subtitle {
  margin: 0 0 24px;
  line-height: 1.6;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 750;
}

.input,
.select {
  width: 100%;
  min-height: 52px;
  padding: 12px 15px;
  border: 2px solid var(--cinza-200);
  border-radius: 14px;
  color: var(--cinza-900);
  outline: none;
  background: var(--branco);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.input:focus,
.select:focus {
  border-color: var(--azul-500);
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.15);
}

.btn {
  min-height: 48px;
  padding: 12px 18px;
  border: 0;
  border-radius: 14px;
  color: var(--branco);
  font-weight: 800;
  background: var(--azul-700);
  transition: transform 120ms ease, filter 120ms ease;
}

.btn:hover:not(:disabled) {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

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

.btn--primary {
  background: linear-gradient(135deg, var(--azul-700), var(--azul-500));
}

.btn--success {
  background: var(--verde);
}

.btn--danger {
  background: var(--vermelho);
}

.btn--warning {
  color: var(--cinza-900);
  background: var(--amarelo);
}

.btn--secondary {
  color: var(--cinza-900);
  background: var(--cinza-200);
}

.btn--dark {
  background: var(--cinza-900);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.status-box {
  padding: 18px;
  border: 1px solid var(--cinza-200);
  border-radius: 16px;
  text-align: center;
  background: var(--cinza-50);
}

.status-box h2,
.status-box h3,
.status-box p {
  margin-top: 0;
}

.message {
  display: none;
  margin-top: 16px;
  padding: 13px 15px;
  border-radius: 12px;
  font-weight: 700;
}

.message.is-visible {
  display: block;
}

.message--error {
  color: #991b1b;
  border: 1px solid #fecaca;
  background: #fee2e2;
}

.message--success {
  color: #166534;
  border: 1px solid #bbf7d0;
  background: #dcfce7;
}

.message--info {
  color: #075985;
  border: 1px solid #bae6fd;
  background: #e0f2fe;
}

.participant-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding: 15px;
  border-radius: 15px;
  background: var(--cinza-100);
}

.participant-name {
  font-weight: 850;
}

.participant-score {
  color: var(--azul-700);
  font-size: 1.2rem;
  font-weight: 900;
  white-space: nowrap;
}

.progress-label {
  margin-bottom: 10px;
  color: var(--cinza-600);
  text-align: center;
  font-weight: 750;
}

.timer {
  display: grid;
  place-items: center;
  width: 105px;
  height: 105px;
  margin: 0 auto 22px;
  border: 8px solid var(--azul-100);
  border-radius: 50%;
  color: var(--azul-800);
  font-size: 2.25rem;
  font-weight: 950;
  background: var(--branco);
}

.timer.is-ending {
  color: var(--vermelho);
  border-color: #fecaca;
  animation: timer-pulse 700ms infinite alternate;
}

@keyframes timer-pulse {
  to {
    transform: scale(1.05);
  }
}

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

.answer-button {
  min-height: 112px;
  border: 0;
  border-radius: 20px;
  color: var(--branco);
  font-size: clamp(2rem, 10vw, 3.4rem);
  font-weight: 950;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.18);
  transition: transform 120ms ease, filter 120ms ease;
}

.answer-button:hover:not(:disabled) {
  filter: brightness(1.08);
  transform: translateY(-3px);
}

.answer-button--a,
.alternative--a,
.distribution--a {
  background: var(--alternativa-a);
}

.answer-button--b,
.alternative--b,
.distribution--b {
  background: var(--alternativa-b);
}

.answer-button--c,
.alternative--c,
.distribution--c {
  background: var(--alternativa-c);
}

.answer-button--d,
.alternative--d,
.distribution--d {
  background: var(--alternativa-d);
}

.answer-button.is-selected {
  outline: 6px solid var(--cinza-900);
  outline-offset: 3px;
}

.result-box {
  padding: 26px;
  border-radius: 20px;
  text-align: center;
}

.result-box--correct {
  color: #14532d;
  background: #dcfce7;
}

.result-box--incorrect {
  color: #7f1d1d;
  background: #fee2e2;
}

.result-icon {
  margin-bottom: 5px;
  font-size: 3.4rem;
}

.result-points {
  margin-top: 10px;
  font-size: 1.6rem;
  font-weight: 950;
}

.screen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
  padding: 20px 24px;
  color: var(--branco);
  border-radius: 22px;
  background: linear-gradient(135deg, var(--azul-900), var(--azul-600));
  box-shadow: var(--sombra);
}

.screen-header h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3.4rem);
}

.screen-header p {
  margin: 7px 0 0;
  color: var(--azul-100);
  font-size: clamp(1rem, 2vw, 1.35rem);
}

.screen-stat {
  flex: 0 0 auto;
  min-width: 170px;
  padding: 14px 20px;
  border-radius: 18px;
  text-align: center;
  background: rgba(255, 255, 255, 0.14);
}

.screen-stat strong {
  display: block;
  font-size: 2rem;
}

.screen-content {
  min-height: calc(100vh - 170px);
}

.screen-center {
  display: grid;
  place-items: center;
  min-height: 68vh;
  text-align: center;
}

.lobby-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 28px;
  align-items: center;
  width: min(1000px, 100%);
}

.lobby-callout {
  padding: 38px;
  text-align: left;
}

.lobby-callout h2 {
  font-size: clamp(2rem, 5vw, 4rem);
}

.public-url {
  color: var(--azul-700);
  font-size: clamp(1.2rem, 3vw, 2rem);
  font-weight: 900;
}

.qr-card {
  padding: 22px;
}

.qr-card img {
  display: block;
  width: 100%;
  border-radius: 14px;
}

.question-card {
  padding: 28px;
}

.question-topline {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
  margin-bottom: 20px;
}

.question-topline .timer {
  margin: 0;
}

.question-counter {
  color: var(--cinza-600);
  font-size: 1.25rem;
  font-weight: 850;
}

.answer-counter {
  color: var(--azul-700);
  text-align: right;
  font-size: 1.25rem;
  font-weight: 850;
}

.question-text {
  margin: 12px auto 28px;
  max-width: 1150px;
  text-align: center;
  font-size: clamp(1.9rem, 4vw, 3.8rem);
  line-height: 1.16;
}

.alternative-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.alternative {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 120px;
  padding: 20px;
  border-radius: 20px;
  color: var(--branco);
  font-size: clamp(1.1rem, 2vw, 1.7rem);
  font-weight: 800;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.18);
}

.alternative__letter {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 3px solid rgba(255, 255, 255, 0.65);
  border-radius: 16px;
  font-size: 1.7rem;
  font-weight: 950;
  background: rgba(255, 255, 255, 0.13);
}

.alternative.is-correct {
  outline: 8px solid #22c55e;
  outline-offset: 4px;
  filter: brightness(1.13);
}

.alternative.is-dimmed {
  opacity: 0.4;
  filter: grayscale(0.55);
}

.distribution-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.distribution {
  padding: 18px;
  border-radius: 18px;
  color: var(--branco);
  text-align: center;
}

.distribution__letter {
  font-size: 1.2rem;
  font-weight: 900;
}

.distribution__percentage {
  display: block;
  margin-top: 5px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 950;
}

.distribution__count {
  font-weight: 750;
}

.podium-wrapper {
  width: min(1050px, 100%);
  padding: 32px;
}

.podium-title {
  margin-bottom: 32px;
  text-align: center;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
}

.podium {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: end;
}

.podium-place {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 260px;
  padding: 24px 15px;
  border-radius: 22px 22px 10px 10px;
  text-align: center;
  box-shadow: var(--sombra);
}

.podium-place--first {
  min-height: 360px;
  color: #713f12;
  background: linear-gradient(145deg, #fef08a, #facc15);
}

.podium-place--second {
  min-height: 305px;
  color: #334155;
  background: linear-gradient(145deg, #f1f5f9, #cbd5e1);
}

.podium-place--third {
  color: #78350f;
  background: linear-gradient(145deg, #fed7aa, #fb923c);
}

.podium-position {
  font-size: 3.2rem;
  font-weight: 950;
}

.podium-name {
  margin: 12px 0;
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 950;
}

.podium-points {
  font-size: 1.25rem;
  font-weight: 850;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
  padding: 22px 25px;
  color: var(--branco);
  border-radius: 22px;
  background: linear-gradient(135deg, var(--azul-900), var(--azul-600));
  box-shadow: var(--sombra);
}

.admin-header h1,
.admin-header p {
  margin: 0;
}

.admin-header p {
  margin-top: 5px;
  color: var(--azul-100);
}

.admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 20px;
}

.admin-column {
  display: grid;
  align-content: start;
  gap: 20px;
}

.admin-card {
  padding: 24px;
}

.admin-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.admin-stat {
  padding: 15px;
  border-radius: 14px;
  text-align: center;
  background: var(--cinza-100);
}

.admin-stat span {
  display: block;
  color: var(--cinza-600);
  font-size: 0.86rem;
}

.admin-stat strong {
  display: block;
  margin-top: 4px;
  color: var(--azul-800);
  font-size: 1.35rem;
}

.admin-question {
  padding: 18px;
  border: 1px solid var(--cinza-200);
  border-radius: 16px;
  background: var(--cinza-50);
}

.admin-question ul {
  margin-bottom: 0;
  padding-left: 22px;
}

.admin-question li {
  margin: 8px 0;
}

.ranking-list {
  display: grid;
  gap: 9px;
  max-height: 560px;
  overflow: auto;
}

.ranking-item {
  display: grid;
  grid-template-columns: 45px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border-radius: 12px;
  background: var(--cinza-100);
}

.ranking-position {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: var(--branco);
  font-weight: 900;
  background: var(--azul-700);
}

.ranking-name {
  min-width: 0;
  overflow: hidden;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ranking-points {
  color: var(--azul-700);
  font-weight: 900;
  white-space: nowrap;
}

.login-card {
  width: min(460px, 100%);
}

.danger-zone {
  border: 2px solid #fecaca;
  background: #fff7f7;
}

.footer-note {
  margin-top: 20px;
  color: var(--cinza-600);
  text-align: center;
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .lobby-grid,
  .admin-grid {
    grid-template-columns: 1fr;
  }

  .qr-card {
    width: min(330px, 100%);
    margin: 0 auto;
  }

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

  .question-topline {
    grid-template-columns: 1fr auto;
  }

  .question-topline .timer {
    grid-row: 1 / 3;
    grid-column: 2;
  }

  .answer-counter {
    text-align: left;
  }
}

@media (max-width: 650px) {
  .page-shell,
  .page-shell--screen,
  .page-shell--admin {
    width: min(100% - 20px, 1180px);
    padding: 10px 0;
  }

  .card__body,
  .admin-card,
  .question-card {
    padding: 18px;
  }

  .screen-header,
  .admin-header {
    align-items: flex-start;
    padding: 17px;
  }

  .screen-stat {
    min-width: 105px;
    padding: 10px;
  }

  .screen-stat strong {
    font-size: 1.4rem;
  }

  .alternative-grid {
    grid-template-columns: 1fr;
  }

  .alternative {
    min-height: 92px;
    padding: 14px;
  }

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

  .podium {
    display: flex;
    flex-direction: column;
  }

  .podium-place,
  .podium-place--first,
  .podium-place--second,
  .podium-place--third {
    width: 100%;
    min-height: 155px;
  }

  .podium-place--first {
    order: -1;
  }

  .admin-header {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .answer-grid {
    gap: 10px;
  }

  .answer-button {
    min-height: 95px;
  }

  .participant-summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .btn-row {
    display: grid;
    grid-template-columns: 1fr;
  }
}