:root {
  --bg-start: #fff0b8;
  --bg-mid: #ffcf70;
  --bg-end: #ff8e8e;
  --card: rgba(255, 255, 255, 0.75);
  --card-strong: rgba(255, 255, 255, 0.9);
  --text: #3f1f4d;
  --muted: #734d87;
  --pink: #ff5fa2;
  --purple: #8b5cf6;
  --blue: #4db5ff;
  --gold: #ffd166;
  --green: #38b76d;
  --red: #f15454;
  --shadow: rgba(118, 52, 103, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, var(--bg-start), var(--bg-mid), var(--bg-end));
}

button,
input {
  font: inherit;
}

.carnival-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.balloon {
  position: absolute;
  width: 70px;
  height: 90px;
  border-radius: 50% 50% 50% 50% / 55% 55% 45% 45%;
  box-shadow: inset -8px -10px rgba(255, 255, 255, 0.2);
  animation: float 10s ease-in-out infinite;
}

.balloon::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -62px;
  width: 2px;
  height: 62px;
  background: rgba(63, 31, 77, 0.3);
  transform: translateX(-50%);
}

.balloon-1 {
  left: 8%;
  top: 7%;
  background: linear-gradient(135deg, #ff6b9a, #ff8f6b);
}

.balloon-2 {
  left: 20%;
  top: 15%;
  background: linear-gradient(135deg, #63d7ff, #5d6cff);
  animation-delay: 1.5s;
}

.balloon-3 {
  right: 18%;
  top: 10%;
  background: linear-gradient(135deg, #ffd166, #ff9f43);
  animation-delay: 2.2s;
}

.balloon-4 {
  right: 8%;
  top: 17%;
  background: linear-gradient(135deg, #b4ff7a, #46d39d);
  animation-delay: 3s;
}

.confetti {
  position: absolute;
  width: 12px;
  height: 24px;
  border-radius: 999px;
  animation: drift 8s linear infinite;
}

.confetti-1 {
  left: 18%;
  top: 12%;
  background: #ff5fa2;
}

.confetti-2 {
  right: 22%;
  top: 18%;
  background: #ffd166;
  animation-delay: 2s;
}

.confetti-3 {
  left: 50%;
  top: 6%;
  background: #5d6cff;
  animation-delay: 1s;
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1100px, calc(100vw - 32px));
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  padding: 32px 0;
}

.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  color: white;
}

.eyebrow {
  margin: 0 0 6px;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.9;
}

.eyebrow.soft {
  color: var(--muted);
}

h1,
h2 {
  margin: 0;
  font-family: "Baloo 2", cursive;
  line-height: 1;
}

h1 {
  font-size: clamp(2.5rem, 4vw, 4rem);
  text-shadow: 0 8px 18px rgba(117, 36, 103, 0.18);
}

.badge {
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
}

.card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
  border-radius: 28px;
  box-shadow: 0 18px 42px var(--shadow);
}

.calculator-card {
  padding: 28px;
}

.student-info {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 20px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
  color: var(--muted);
}

input {
  width: 100%;
  border: 2px solid rgba(139, 92, 246, 0.18);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus {
  outline: none;
  border-color: rgba(91, 119, 255, 0.8);
  box-shadow: 0 0 0 4px rgba(91, 119, 255, 0.12);
}

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

.weight-box {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 24px 0 18px;
  gap: 14px;
}

.weight-box div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 16px;
  padding: 14px 16px;
  border: 1px solid rgba(139, 92, 246, 0.12);
}

.weight-box span {
  font-size: 0.8rem;
  color: var(--muted);
}

.weight-box strong {
  font-size: 1.05rem;
}

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

button {
  border: none;
  border-radius: 14px;
  padding: 14px 22px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover {
  transform: translateY(-2px);
}

#calculateBtn {
  background: linear-gradient(135deg, var(--pink), var(--purple));
  color: white;
  box-shadow: 0 12px 28px rgba(139, 92, 246, 0.22);
}

.secondary {
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
}

.result-card {
  padding: 28px;
  background: var(--card-strong);
}

.result-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.score-ring {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--gold) 0deg 180deg, #f4d8ff 180deg 360deg);
  position: relative;
  box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.8);
}

.score-ring::before {
  content: "";
  position: absolute;
  inset: 12px;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 50%;
}

#finalScore {
  position: relative;
  z-index: 1;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text);
}

.stats-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stats-grid article {
  background: rgba(255, 255, 255, 0.7);
  border-radius: 18px;
  padding: 14px 16px;
  border: 1px solid rgba(139, 92, 246, 0.12);
}

.stats-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 8px;
}

.stats-grid strong {
  font-size: 1.25rem;
}

.message-box {
  margin-top: 22px;
  background: rgba(91, 119, 255, 0.08);
  border-left: 6px solid var(--blue);
  border-radius: 16px;
  padding: 16px 18px;
  color: var(--text);
  font-weight: 600;
  line-height: 1.6;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-18px) rotate(4deg); }
}

@keyframes drift {
  0% { transform: translateY(0px) rotate(0deg); opacity: 0; }
  15% { opacity: 1; }
  100% { transform: translateY(110px) rotate(160deg); opacity: 0; }
}

@media (max-width: 840px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .student-info,
  .input-grid,
  .stats-grid,
  .weight-box {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .student-info,
  .input-grid,
  .stats-grid,
  .weight-box {
    grid-template-columns: 1fr;
  }

  .topbar,
  .result-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .calculator-card,
  .result-card {
    padding: 20px;
  }
}