@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap");

/* ===== Design Tokens ===== */
:root {
  --bg-0: #0b0b10; /* page background */
  --bg-1: #0f1220; /* container background */
  --card: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.12);

  --text-1: #f6f7fb; /* primary text */
  --text-2: #c9cbe3; /* secondary text */
  --muted: #8b8ea6;

  --accent: #7c5cff; /* primary accent (neon violet) */
  --accent-2: #22d3ee; /* cyan */
  --accent-3: #ff6b6b; /* coral */
  --good: #39d98a; /* correct */
  --bad: #ff5c7a; /* wrong */

  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 12px;

  --shadow-1: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-2: 0 12px 40px rgba(124, 92, 255, 0.25);
}

/* ===== Base Reset ===== */
* {
  box-sizing: border-box;
}
html,
body {
  height: 100vh;
  overflow: hidden;
}
body {
  margin: 0;
  padding: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial,
    sans-serif;
  color: var(--text-1);
  background: radial-gradient(
      1200px 600px at 20% -10%,
      #1e1144 0%,
      transparent 60%
    ),
    radial-gradient(1000px 500px at 90% 10%, #102a43 0%, transparent 60%),
    var(--bg-0);
  overflow-x: hidden;
}

/* animated aurora backdrop */
body::before {
  content: "";
  position: fixed;
  inset: -20vmax;
  background: conic-gradient(
    from 180deg at 50% 50%,
    #7c5cff33,
    #22d3ee33,
    #ff6b6b33,
    #7c5cff33
  );
  filter: blur(60px);
  opacity: 0.25;
  animation: aurora 18s linear infinite;
  pointer-events: none;
  z-index: -1;
}
@keyframes aurora {
  0% {
    transform: rotate(0deg) scale(1.05);
  }
  50% {
    transform: rotate(180deg) scale(1.1);
  }
  100% {
    transform: rotate(360deg) scale(1.05);
  }
}

/* ===== Layout ===== */
.container {
  max-width: 760px;
  width: min(92vw, 760px);
  margin: clamp(24px, 6vh, 60px) auto;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.03)
  );
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-1), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  padding: clamp(18px, 3vw, 28px);
  position: relative;
}

/* subtle inner glow strip */
.container::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    inset 0 20px 60px rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

/* ===== Banner (your yellow/orange header box) ===== */
.banner {
  background: linear-gradient(90deg, #ffd64d, #ff8a4d);
  color: #1b1b1b;
  border-radius: var(--radius-lg);
  padding: clamp(16px, 2.5vw, 22px);
  text-align: left;
  box-shadow: 0 10px 30px rgba(255, 140, 70, 0.25);
}
.banner h2 {
  margin: 0 0 6px;
  font-weight: 800;
  letter-spacing: 0.2px;
}
.banner p {
  margin: 0;
  color: #2a2a2a;
  font-weight: 600;
  opacity: 0.9;
}

/* ===== Cards ===== */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: clamp(16px, 2.5vw, 22px);
  margin-top: 18px;
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(10px);
}

/* ===== Headings / Question ===== */
#question-text {
  margin: 4px 0 10px;
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-1);
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.35);
}

/* ===== Choices ===== */
#choices-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
#choices-list li {
  position: relative;
  padding: 14px 16px 14px 46px;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.04),
    rgba(255, 255, 255, 0.02)
  );
  color: var(--text-2);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, border-color 0.2s ease,
    background 0.2s ease;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.25);
}

/* radio bullet glow */
#choices-list li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  box-shadow: inset 0 0 0 2px rgba(0, 0, 0, 0.35);
  transition: all 0.25s ease;
}

/* hover / focus */
#choices-list li:hover {
  transform: translateY(-2px);
  border-color: rgba(124, 92, 255, 0.6);
  box-shadow: var(--shadow-2);
  background: linear-gradient(
    180deg,
    rgba(124, 92, 255, 0.08),
    rgba(34, 211, 238, 0.06)
  );
  color: #eef0ff;
}
#choices-list li:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 60%, white 0%);
}

/* selected (pre-answer) */
.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.25), var(--shadow-2);
}
.selected::before {
  background: radial-gradient(
    circle at 50% 50%,
    var(--accent) 0%,
    transparent 70%
  );
  border-color: transparent;
}

/* result states */
.correct {
  background: linear-gradient(
    180deg,
    rgba(57, 217, 138, 0.18),
    rgba(57, 217, 138, 0.1)
  ) !important;
  border-color: color-mix(in srgb, var(--good) 55%, white 0%) !important;
  color: #eafff4 !important;
}
.correct::before {
  background: radial-gradient(
    circle at 50% 50%,
    var(--good) 0%,
    transparent 70%
  );
  border-color: transparent;
  box-shadow: 0 0 18px rgba(57, 217, 138, 0.55);
}
.wrong {
  background: linear-gradient(
    180deg,
    rgba(255, 92, 122, 0.18),
    rgba(255, 92, 122, 0.08)
  ) !important;
  border-color: color-mix(in srgb, var(--bad) 55%, white 0%) !important;
  color: #ffeef1 !important;
}
.wrong::before {
  background: radial-gradient(
    circle at 50% 50%,
    var(--bad) 0%,
    transparent 70%
  );
  border-color: transparent;
  box-shadow: 0 0 18px rgba(255, 92, 122, 0.5);
}

/* ===== Buttons ===== */
button {
  appearance: none;
  border: none;
  cursor: pointer;
  font-weight: 700;
  color: #fff;
}
.btn {
  margin-top: 16px;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 20px rgba(124, 92, 255, 0.35);
  transition: transform 0.12s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.btn:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 16px 30px rgba(124, 92, 255, 0.45);
}
.btn:active {
  transform: translateY(0) scale(0.99);
  filter: brightness(0.95);
}
.btn.start {
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  padding: 14px 26px;
}

/* subtle glowing ring */
.btn::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: radial-gradient(
      120px 60px at 30% -20%,
      rgba(255, 255, 255, 0.35),
      transparent 40%
    ),
    radial-gradient(
      200px 80px at 110% 120%,
      rgba(34, 211, 238, 0.25),
      transparent 46%
    );
  filter: blur(14px);
  opacity: 0.35;
  z-index: -1;
}

/* result box text */
#result-container h2 {
  margin: 4px 0 8px;
  letter-spacing: 0.2px;
  font-weight: 800;
}
#score {
  color: var(--muted);
  font-weight: 600;
}

/* hidden utility */
.hidden {
  display: none !important;
}

/* ===== Accessibility & Motion Prefs ===== */
:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* ===== Small screens ===== */
@media (max-width: 520px) {
  .container {
    padding: 16px;
  }
  .banner {
    padding: 14px;
  }
  #choices-list {
    gap: 10px;
  }
}