:root {
  --bg: #000000;
  --panel: rgba(0, 0, 0, 0.9);
  --panel-strong: rgba(0, 0, 0, 0.94);
  --panel-soft: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.16);
  --text-main: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.68);
  --text-faint: rgba(255, 255, 255, 0.46);
  --shadow: none;
  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 12px;
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
  min-height: 100svh;
  font-family: "Manrope", sans-serif;
  color: var(--text-main);
  background: var(--bg);
  overflow-x: hidden;
}

button,
img {
  display: block;
}

button {
  border: 0;
  font: inherit;
  cursor: pointer;
}

.app-shell,
.screen,
.game-panel {
  min-height: 100vh;
  min-height: 100svh;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

#start-screen.active,
#end-screen.active {
  display: grid;
  place-items: center;
  padding: 24px;
  background: #000000;
}

#start-screen.active {
  align-items: center;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  backdrop-filter: none;
  box-shadow: var(--shadow);
}

.intro-panel {
  width: min(720px, 100%);
  padding: 52px 34px 34px;
  text-align: center;
  border-radius: 24px;
}

.start-layout {
  display: grid;
  grid-template-columns: minmax(520px, 720px);
  justify-content: center;
  align-items: start;
  width: min(720px, 100%);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}

h1,
h2,
.subtitle,
.prompt-label,
.feedback-text,
.fact-text,
.source-text {
  margin: 0;
}

h1,
h2 {
  font-family: "Anton", sans-serif;
  font-weight: 400;
  text-transform: uppercase;
  line-height: 0.98;
}

h1 {
  font-size: clamp(3.3rem, 10vw, 6.4rem);
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(2.3rem, 7vw, 4rem);
  letter-spacing: 0.02em;
}

.score-value {
  display: block;
  margin-top: 8px;
  font-family: "Anton", sans-serif;
  font-size: 5rem;
  line-height: 0.95;
  color: #32d36b;
  text-shadow: 0 0 24px rgba(50, 211, 107, 0.26);
}

.end-panel {
  width: min(760px, 100%);
  padding: 38px;
}

.score-hero,
.score-form,
.end-panel .leaderboard-panel,
.end-actions {
  animation: endReveal 0.58s ease both;
}

.score-hero {
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.score-hero h2 {
  font-size: 2.35rem;
}

.score-hero .subtitle {
  margin-top: 12px;
}

.score-form {
  animation-delay: 90ms;
}

.end-panel .leaderboard-panel {
  animation-delay: 160ms;
}

.end-actions {
  display: grid;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  animation-delay: 220ms;
}

.score-form,
.leaderboard-panel {
  margin-top: 24px;
}

.score-label {
  display: block;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.saved-player-name {
  display: none;
  margin: 0 0 12px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.92rem;
  font-weight: 800;
}

.score-form.has-saved-name .saved-player-name {
  display: block;
}

.score-form.has-saved-name .score-input {
  display: none;
}

.score-form.has-saved-name .score-input-row {
  grid-template-columns: auto;
  justify-content: center;
}

.score-input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  width: min(420px, 100%);
  margin: 0 auto;
}

.score-input,
.save-score-button {
  min-height: 48px;
  border-radius: 14px;
  font: inherit;
  font-weight: 800;
}

.score-input {
  width: 100%;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  outline: 0;
}

.score-input:focus {
  border-color: rgba(255, 255, 255, 0.38);
}

.score-input::placeholder {
  color: rgba(255, 255, 255, 0.42);
}

.save-score-button {
  padding: 0 18px;
  background: #ffffff;
  color: #000000;
  transition: background 0.28s ease, transform 0.28s ease;
}

.save-score-button:hover {
  background: #e8e8e8;
  transform: translateY(-1px);
}

.save-message {
  min-height: 1.2em;
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.86rem;
  font-weight: 700;
}

.leaderboard-panel {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: left;
}

.leaderboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.leaderboard-header h3 {
  margin: 0;
  font-size: 0.96rem;
}

.leaderboard-header span {
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.8rem;
  font-weight: 800;
}

.leaderboard-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style-position: inside;
}

.leaderboard-list li {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.28);
}

.leaderboard-name,
.leaderboard-score,
.leaderboard-meta {
  font-size: 0.9rem;
  font-weight: 800;
}

.leaderboard-score {
  color: #32d36b;
}

.leaderboard-meta,
.leaderboard-empty {
  color: rgba(255, 255, 255, 0.48);
}

.subtitle {
  margin-top: 18px;
  max-width: 34rem;
  margin-inline: auto;
  color: var(--text-muted);
  font-size: clamp(1rem, 2vw, 1.08rem);
  line-height: 1.65;
}

.primary-button {
  min-width: 170px;
  margin: 28px auto 0;
  padding: 14px 24px;
  border-radius: 12px;
  background: #ffffff;
  color: #000000;
  font-weight: 800;
  transition: background 0.35s ease, opacity 0.35s ease, transform 0.35s ease;
}

.primary-button:hover {
  background: #e8e8e8;
  transform: translateY(-1px);
}

.start-game-button {
  margin-top: 38px;
  transition: background 0.35s ease, opacity 0.35s ease;
}

.start-game-button:hover {
  min-width: 190px;
  padding-inline: 30px;
  animation: startButtonBounce 0.42s cubic-bezier(0.25, 1.15, 0.4, 1) both;
}

.menu-scoreboard {
  margin-top: 22px;
}

.scoreboard-toggle {
  margin-inline: auto;
  padding: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 5px;
  transition: color 0.28s ease, transform 0.28s ease;
}

.scoreboard-toggle:hover {
  color: #ffffff;
  transform: translateY(-1px);
}

.scoreboard-collapse {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-8px);
  transition: max-height 0.45s ease, opacity 0.32s ease, transform 0.32s ease;
}

.scoreboard-collapse.open {
  max-height: 360px;
  opacity: 1;
  transform: translateY(0);
}

.menu-leaderboard-panel {
  margin-top: 12px;
}

@keyframes startButtonBounce {
  0% {
    transform: translateY(0) scaleX(1);
  }

  45% {
    transform: translateY(-1px) scaleX(1.05);
  }

  70% {
    transform: translateY(-1px) scaleX(1.01);
  }

  100% {
    transform: translateY(-1px) scaleX(1.05);
  }
}

.mode-grid {
  --selected-mode-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  position: relative;
  margin-top: 28px;
  padding: 6px;
  border-radius: 18px;
  background: #111111;
  overflow: hidden;
}

.mode-indicator {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  z-index: 0;
  width: calc((100% - 12px - 30px) / 4);
  border-radius: 14px;
  background: #ffffff;
  transform: translateX(calc(var(--selected-mode-index) * (100% + 10px)));
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.mode-card {
  position: relative;
  z-index: 1;
  min-height: 76px;
  padding: 14px 12px;
  border-radius: 14px;
  background: transparent;
  border: 1px solid transparent;
  color: #ffffff;
  text-align: center;
  transition: background 0.38s ease, color 0.38s ease, border-color 0.38s ease, transform 0.38s ease;
}

.mode-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: transparent;
  transform: translateY(-1px);
}

.mode-card.selected {
  background: transparent;
  border-color: transparent;
  color: #000000;
}

.mode-card.selected:hover {
  background: transparent;
}

.mode-name,
.mode-meta {
  display: block;
}

.mode-name {
  font-weight: 800;
  font-size: 0.98rem;
}

.mode-meta {
  margin-top: 5px;
  color: currentColor;
  font-size: 0.8rem;
  font-weight: 700;
  opacity: 0.58;
}

.game-panel {
  position: relative;
  isolation: isolate;
  background: #000000;
}

.image-frame {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: #030303;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.03);
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.24) 0%, rgba(0, 0, 0, 0.04) 34%, rgba(0, 0, 0, 0.18) 68%, rgba(0, 0, 0, 0.62) 100%);
}

.game-header {
  position: absolute;
  top: 20px;
  left: 20px;
  right: 20px;
  z-index: 2;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
}

#round-label {
  justify-self: center;
}

.status-pill {
  padding: 10px 15px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: none;
  color: var(--text-main);
  font-size: 0.94rem;
  font-weight: 700;
}

.home-button {
  padding: 10px 15px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
  font-size: 0.94rem;
  font-weight: 800;
  transition: background 0.28s ease, border-color 0.28s ease;
}

.home-button:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.28);
}

.subtle-link-button {
  margin: 0 auto;
  padding: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.56);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 5px;
  transition: color 0.28s ease, transform 0.28s ease;
}

.subtle-link-button:hover {
  color: #ffffff;
  transform: translateY(-1px);
}

@keyframes endReveal {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.bottom-dock {
  position: absolute;
  left: 50%;
  bottom: max(20px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 2;
  width: min(760px, calc(100% - 32px));
  max-height: calc(100svh - 112px);
  padding: 16px;
  border-radius: 24px;
  background: rgba(0, 0, 0, 0.9);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.14);
  overflow-y: auto;
  overscroll-behavior: contain;
  transition: padding 0.35s ease, border-radius 0.35s ease, background 0.35s ease;
}

.prompt-block {
  width: 100%;
  margin: 0 0 12px;
}

.prompt-label {
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}

.answers-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  width: 100%;
  margin: 0;
}

.answer-button {
  min-height: 52px;
  padding: 13px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.35;
  animation: answerIn 0.42s ease both;
  animation-delay: calc(var(--answer-index) * 55ms);
  transition: background 0.32s ease, border-color 0.32s ease, color 0.32s ease, opacity 0.32s ease, transform 0.32s ease;
}

.answer-button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.answer-button:disabled {
  cursor: default;
}

.answer-button.correct {
  background: #32d36b;
  border-color: #32d36b;
  color: #031408;
  transform: translateY(-1px);
  box-shadow: 0 0 22px rgba(50, 211, 107, 0.34);
}

.answer-button.wrong {
  background: rgba(255, 79, 97, 0.16);
  border-color: rgba(255, 79, 97, 0.5);
  color: #ffb8c0;
  opacity: 1;
}

.feedback-panel {
  position: relative;
  width: 100%;
  max-height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border-radius: 0;
  background: transparent;
  border: 0;
  opacity: 0;
  transform: translateY(8px);
  transition: max-height 0.45s ease, margin 0.45s ease, opacity 0.35s ease, transform 0.35s ease;
}

.feedback-panel.open {
  max-height: 260px;
  margin-bottom: 12px;
  padding-right: 118px;
  opacity: 1;
  transform: translateY(0);
}

.feedback-text {
  font-size: 0.96rem;
  font-weight: 800;
  color: #ffffff;
}

.fact-text {
  margin-top: 8px;
  max-width: 58rem;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.5;
  font-size: 0.94rem;
}

.source-text {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.42);
  font-size: 0.78rem;
  font-weight: 700;
}

.next-icon-button {
  position: absolute;
  top: 0;
  right: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 96px;
  padding: 10px 14px;
  border-radius: 999px;
  background: #ffffff;
  color: #000000;
  font-weight: 800;
  transition: background 0.32s ease, transform 0.32s ease;
}

.next-icon-button:hover {
  background: #e8e8e8;
  transform: translateX(2px);
}

.next-arrow {
  position: relative;
  width: 15px;
  height: 10px;
}

.next-arrow::before,
.next-arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  background: currentColor;
}

.next-arrow::before {
  width: 15px;
  height: 2px;
  transform: translateY(-50%);
}

.next-arrow::after {
  width: 7px;
  height: 7px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  background: transparent;
  transform: translateY(-50%) rotate(45deg);
}

.hidden {
  display: none;
}

@keyframes answerIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  #start-screen.active,
  #end-screen.active {
    padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
  }

  .intro-panel {
    padding: 30px 18px;
    border-radius: 24px;
  }

  .start-layout {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .start-layout .intro-panel {
    grid-row: 1;
  }

  h1 {
    font-size: 3.4rem;
  }

  h2 {
    font-size: 2.5rem;
  }

  .end-panel {
    padding: 28px 18px;
  }

  .score-hero h2 {
    font-size: 2rem;
  }

  .score-value {
    font-size: 4rem;
  }

  .end-actions .primary-button,
  .score-form.has-saved-name .save-score-button {
    width: 100%;
  }

  .subtitle {
    margin-top: 14px;
    font-size: 0.98rem;
    line-height: 1.5;
  }

  .score-input-row,
  .leaderboard-list li {
    grid-template-columns: 1fr;
  }

  .leaderboard-list li {
    gap: 4px;
  }

  .mode-grid {
    grid-template-columns: 1fr;
    gap: 7px;
    margin-top: 22px;
    padding: 8px;
    border-radius: 20px;
  }

  .mode-indicator {
    display: none;
  }

  .mode-card.selected {
    background: #ffffff;
  }

  .mode-card {
    min-height: 54px;
    padding: 12px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
  }

  .mode-card:hover {
    transform: none;
  }

  .mode-name {
    font-size: 0.92rem;
  }

  .mode-meta {
    margin-top: 0;
    font-size: 0.74rem;
  }

  .start-game-button {
    width: 100%;
    margin-top: 26px;
  }

  .start-game-button:hover {
    min-width: 0;
    padding-inline: 24px;
  }

  .game-header {
    top: 14px;
    left: 14px;
    right: 14px;
    grid-template-columns: 1fr 1fr;
  }

  #round-label {
    justify-self: start;
  }

  .status-pill {
    font-size: 0.88rem;
  }

  .home-button {
    font-size: 0.88rem;
  }

  .bottom-dock {
    width: calc(100% - 20px);
    bottom: max(10px, env(safe-area-inset-bottom));
    max-height: calc(100svh - 98px);
    padding: 14px;
    border-radius: 20px;
  }

  .prompt-block {
    margin-bottom: 10px;
  }

  .answers-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .answer-button {
    min-height: 50px;
    padding: 12px 14px;
    font-size: 0.92rem;
  }

  .feedback-panel.open {
    max-height: 45svh;
    padding-top: 46px;
    padding-right: 0;
  }

  .next-icon-button {
    left: 0;
    right: auto;
  }

  .fact-text {
    font-size: 0.88rem;
  }

  .source-text {
    font-size: 0.72rem;
  }
}

@media (max-width: 380px) {
  .intro-panel {
    padding: 24px 14px;
  }

  h1 {
    font-size: 2.9rem;
  }

  .mode-card {
    min-height: 50px;
  }

  .bottom-dock {
    width: calc(100% - 14px);
    padding: 12px;
  }
}

@media (max-width: 1180px) and (min-width: 641px) {
  .start-layout {
    grid-template-columns: minmax(0, 720px);
    justify-content: center;
  }

  .start-layout .intro-panel {
    grid-row: 1;
  }

}

@media (max-height: 620px) and (orientation: landscape) {
  .bottom-dock {
    width: min(900px, calc(100% - 24px));
    max-height: calc(100svh - 76px);
    bottom: 8px;
  }

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

  .feedback-panel.open {
    max-height: 34svh;
  }
}