* {
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
}

body.dark {
  background: linear-gradient(180deg, #020617, #0f172a);
  color: #e5e7eb;
  margin: 0;
}

body.light {
  background: #f8fafc;
  color: #020617;
}

/* HEADER */
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 25px 30px;
}

.brand h1 {
  font-size: 36px;
  margin: 0;
  letter-spacing: 1px;
}

.brand span {
  color: #facc15;
}

.brand p {
  margin-top: 4px;
  font-size: 13px;
  opacity: 0.8;
}

.theme-btn {
  border: none;
  background: none;
  font-size: 18px;
  cursor: pointer;
}

/* HERO */
.hero {
  text-align: center;
  padding: 40px 25px 20px;
}

.hero h2 {
  font-size: 28px;
  margin-bottom: 10px;
}

.hero p {
  max-width: 600px;
  margin: auto;
  opacity: 0.85;
}

/* INPUT */
.input-section {
  display: flex;
  justify-content: center;
  padding: 30px 20px;
}

.input-card {
  background: rgba(255,255,255,0.06);
  padding: 30px;
  border-radius: 18px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.question {
  font-size: 14px;
  opacity: 0.85;
  margin-bottom: 20px;
}

input {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: none;
  margin-bottom: 15px;
  font-size: 15px;
}

button {
  width: 100%;
  padding: 14px;
  background: #facc15;
  border: none;
  border-radius: 12px;
  font-weight: bold;
  cursor: pointer;
}

/* RESULT */
.result-section {
  max-width: 500px;
  margin: auto;
  background: rgba(255,255,255,0.06);
  padding: 25px;
  border-radius: 18px;
  text-align: center;
}

/* INSIGHTS */
.insights {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 40px 20px;
}

.insight-card {
  background: rgba(255,255,255,0.06);
  padding: 20px;
  border-radius: 16px;
  width: 180px;
  text-align: center;
}

/* FEATURES */
.features {
  text-align: center;
  padding: 40px 25px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
  gap: 25px;
  margin-top: 25px;
}

.feature {
  background: rgba(255,255,255,0.06);
  padding: 25px;
  border-radius: 18px;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 20px;
  font-size: 13px;
  opacity: 0.7;
}

.hidden {
  display: none;
}