:root {
  --blue-900: #07149a;
  --blue-800: #0824a8;
  --blue-600: #005fd6;
  --sky: #00a6e8;
  --sky-soft: #33d6ff;
  --gold: #ffd34e;
  --gold-2: #f7a900;
  --white: #ffffff;
  --ink: #07103a;
  --danger: #ff3b4f;
  --ok: #00c853;
  --shadow: 0 20px 45px rgba(0,0,0,.28);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Montserrat", "Trebuchet MS", Arial, sans-serif;
  color: var(--white);
  background: radial-gradient(circle at top, #05c8ff 0, #0076d6 35%, var(--blue-900) 80%);
  overflow: hidden;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

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

.app-shell {
  width: 100vw;
  height: 100vh;
  position: relative;
  background:
    linear-gradient(180deg, rgba(0,0,0,.18), rgba(0,0,0,.3)),
    url("assets/footer1.jpg") center bottom / 100% 24% no-repeat,
    radial-gradient(circle at 50% 15%, #18d8ff, var(--blue-900) 75%);
}

.screen {
  display: none;
  min-height: 100vh;
  padding: clamp(18px, 3vw, 36px);
  position: relative;
}

.screen.active { display: flex; }

.hero-screen,
.end-screen {
  align-items: center;
  justify-content: center;
}

.brand-bar {
  position: absolute;
  top: clamp(16px, 2.4vw, 28px);
  left: clamp(18px, 3vw, 36px);
  right: clamp(18px, 3vw, 36px);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  width: min(25vw, 160px);
  height: auto;
  filter: drop-shadow(0 8px 10px rgba(0,0,0,.25));
}
.logo.small { width: 120px; }
.result-logo { width: 160px; margin-bottom: 12px; }

.badge {
  padding: 10px 18px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold), var(--gold-2));
  color: var(--blue-900);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
  box-shadow: 0 8px 18px rgba(0,0,0,.24);
}

.hero-card,
.question-card,
.result-card {
  width: min(920px, 92vw);
  border-radius: 34px;
  background: rgba(255,255,255,.95);
  color: var(--ink);
  box-shadow: var(--shadow);
  border: 5px solid rgba(255,211,78,.95);
}

.hero-card {
  padding: clamp(28px, 5vw, 58px);
  text-align: center;
  background:
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(255,255,255,.92)),
    url("assets/banner.jpg") center / cover no-repeat;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--blue-800);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .08em;
}

h1 {
  margin: 0;
  font-family: "Cooper Black", Georgia, serif;
  font-size: clamp(54px, 8vw, 108px);
  line-height: .88;
  color: var(--gold-2);
  text-shadow:
    2px 2px 0 var(--blue-900),
    0 7px 0 rgba(7,20,154,.15);
}

.subtitle {
  margin: 18px 0 24px;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 900;
}

.rules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 24px auto 30px;
  max-width: 760px;
}

.rules div {
  border-radius: 20px;
  background: linear-gradient(180deg, var(--blue-800), var(--blue-900));
  color: white;
  padding: 18px 10px;
  box-shadow: inset 0 -4px 0 rgba(255,211,78,.45);
}

.rules strong {
  display: block;
  font-size: clamp(30px, 5vw, 54px);
  color: var(--gold);
  line-height: 1;
}
.rules span {
  display: block;
  font-weight: 800;
  text-transform: uppercase;
}

.primary-btn {
  min-width: min(520px, 84vw);
  min-height: 78px;
  padding: 18px 36px;
  border-radius: 999px;
  color: var(--blue-900);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 1000;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--gold), var(--gold-2));
  box-shadow: 0 13px 0 #a66e00, 0 25px 26px rgba(0,0,0,.28);
}
.primary-btn:active {
  transform: translateY(6px);
  box-shadow: 0 7px 0 #a66e00, 0 12px 18px rgba(0,0,0,.25);
}

.small-note {
  font-size: 16px;
  margin: 24px 0 0;
  color: #334;
  font-weight: 700;
}

.game-screen { flex-direction: column; gap: 18px; }

.top-panel {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 18px;
  align-items: center;
}

.timer-wrap,
.score-wrap {
  min-width: 150px;
  border-radius: 22px;
  background: rgba(255,255,255,.94);
  color: var(--blue-900);
  padding: 10px 18px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0,0,0,.2);
  border: 3px solid var(--gold);
}
.timer-label,
.score-label {
  display: block;
  text-transform: uppercase;
  font-size: 14px;
  font-weight: 900;
}
.timer,
.score-wrap span:not(.score-label) {
  font-size: 38px;
  font-weight: 1000;
}

.progress-track {
  height: 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.25);
  overflow: hidden;
  border: 2px solid rgba(255,255,255,.5);
}
#progressBar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gold), var(--sky-soft));
  transition: width .25s ease;
}

.question-card {
  flex: 1;
  align-self: center;
  padding: clamp(22px, 3vw, 38px);
  display: flex;
  flex-direction: column;
}

.question-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--blue-800);
  font-weight: 1000;
  text-transform: uppercase;
  letter-spacing: .03em;
  margin-bottom: 12px;
}

#categoryLabel {
  background: #e7f8ff;
  border: 2px solid var(--sky);
  color: var(--blue-900);
  border-radius: 999px;
  padding: 6px 12px;
}

#questionText {
  margin: 8px 0 22px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.08;
  color: var(--ink);
}

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: auto;
}

.option-btn {
  min-height: 110px;
  padding: 18px;
  border-radius: 24px;
  color: var(--white);
  font-size: clamp(20px, 2.5vw, 30px);
  line-height: 1.08;
  font-weight: 1000;
  background: linear-gradient(180deg, var(--blue-600), var(--blue-900));
  border: 4px solid var(--gold);
  box-shadow: 0 8px 0 #00106f, 0 16px 20px rgba(0,0,0,.22);
}
.option-btn:active {
  transform: translateY(4px);
  box-shadow: 0 4px 0 #00106f, 0 8px 12px rgba(0,0,0,.22);
}
.option-btn.correct { background: linear-gradient(180deg, #00d46a, #008d3f); }
.option-btn.wrong { background: linear-gradient(180deg, #ff6b77, #ce1a2d); }

.feedback {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  min-width: 260px;
  text-align: center;
  padding: 12px 22px;
  border-radius: 999px;
  background: rgba(0,0,0,.78);
  color: #fff;
  font-weight: 1000;
  font-size: 26px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
}
.feedback.show { opacity: 1; }

.result-card { text-align: center; padding: clamp(28px, 5vw, 58px); }
.result-card.win {
  background:
    radial-gradient(circle at top, rgba(255,211,78,.4), rgba(255,255,255,.96) 45%),
    white;
}
.result-card.lose { border-color: #99dfff; }
.result-card h2 {
  margin: 4px 0 14px;
  font-family: "Cooper Black", Georgia, serif;
  font-size: clamp(42px, 7vw, 82px);
  line-height: .95;
  color: var(--blue-900);
}
.result-card p {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 900;
  margin: 0 0 22px;
}
.validation-code {
  display: none;
  margin: 20px auto 28px;
  width: fit-content;
  padding: 16px 26px;
  border-radius: 18px;
  border: 3px dashed var(--blue-900);
  background: #fff8cf;
  color: var(--blue-900);
  font-size: 24px;
  font-weight: 1000;
  letter-spacing: .06em;
}
.validation-code.visible { display: block; }

.confetti {
  position: absolute;
  width: 150px;
  height: 150px;
  pointer-events: none;
  background:
    radial-gradient(circle, var(--gold) 0 5px, transparent 6px),
    radial-gradient(circle at 70% 30%, var(--sky-soft) 0 6px, transparent 7px),
    radial-gradient(circle at 20% 70%, white 0 4px, transparent 5px);
  opacity: .75;
}
.confetti-left { left: 3vw; bottom: 8vh; transform: rotate(18deg); }
.confetti-right { right: 4vw; top: 14vh; transform: rotate(-16deg); }

@media (max-width: 760px) {
  .options { grid-template-columns: 1fr; }
  .top-panel { grid-template-columns: 1fr 1fr; }
  .top-panel .logo { grid-column: 1 / -1; width: 110px; }
  .timer-wrap, .score-wrap { min-width: auto; }
  .rules { grid-template-columns: 1fr; }
  body { overflow-y: auto; }
}