* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: #edfafa;
  background:
    radial-gradient(circle at 10% 5%, #07353b 0, transparent 28%),
    radial-gradient(circle at 90% 20%, #24133e 0, transparent 30%),
    #05080d;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .12;
  background-image:
    linear-gradient(#54e8df22 1px, transparent 1px),
    linear-gradient(90deg, #9c76ff18 1px, transparent 1px);
  background-size: 38px 38px;
}

.app {
  width: min(1120px, 100%);
  margin: auto;
  padding: 20px;
  position: relative;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0 20px;
  border-bottom: 1px solid #ffffff12;
}

.logo {
  font-weight: 900;
  letter-spacing: .16em;
}

.badge {
  padding: 9px 14px;
  border: 1px solid #55e4dc55;
  border-radius: 999px;
  color: #70e8e1;
  font-size: 11px;
  letter-spacing: .1em;
}

.hero {
  max-width: 820px;
  padding: 65px 0 40px;
}

.eyebrow,
.section-label,
.panel-heading span,
.result-heading span,
.question-card span,
.answer-card span {
  color: #5ee4dc;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .18em;
}

.hero h1 {
  margin: 15px 0;
  font-size: clamp(45px, 8vw, 80px);
  line-height: .95;
  letter-spacing: -.06em;
}

.hero h1 span {
  color: #a27cff;
}

.hero p {
  max-width: 700px;
  color: #9cafb5;
  font-size: 17px;
  line-height: 1.7;
}

.mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 16px;
}

.mode {
  padding: 20px;
  text-align: left;
  color: #e9f7f8;
  background: #0a1018;
  border: 1px solid #ffffff12;
  border-radius: 18px;
  cursor: pointer;
}

.mode.active {
  border-color: #55e4dc66;
  background: linear-gradient(135deg, #0d272c, #151024);
}

.mode strong {
  display: inline-block;
  margin-left: 6px;
  font-size: 16px;
}

.mode small {
  display: block;
  margin-top: 7px;
  margin-left: 29px;
  color: #7e969c;
}

.panel,
.result {
  padding: 26px;
  background: #080e15ee;
  border: 1px solid #ffffff14;
  border-radius: 24px;
  box-shadow: 0 25px 80px #0009;
}

.panel-heading,
.result-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.panel-heading h2,
.result-heading h2 {
  margin: 8px 0 22px;
  font-size: 29px;
}

.panel-heading > b {
  height: fit-content;
  padding: 7px 10px;
  border: 1px solid #55e4dc44;
  border-radius: 999px;
  color: #65ddd6;
  font-size: 10px;
  letter-spacing: .1em;
}

.upload-box {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px dashed #55e4dc66;
  border-radius: 18px;
  background: radial-gradient(circle, #10414955, transparent 65%);
  cursor: pointer;
}

.upload-box input {
  display: none;
}

.upload-icon {
  font-size: 45px;
  color: #5ce5dd;
}

.upload-box h3 {
  margin: 7px 0;
}

.upload-box p,
.upload-box small {
  margin: 3px;
  color: #7f979d;
  font-size: 12px;
}

.upload-box small {
  color: #5ee1d9;
}

.field {
  display: block;
  margin-top: 20px;
  font-weight: 750;
}

textarea,
select {
  width: 100%;
  margin-top: 8px;
  padding: 14px;
  color: #edfafa;
  background: #050a10;
  border: 1px solid #ffffff18;
  border-radius: 14px;
  font: inherit;
  outline: none;
}

textarea {
  min-height: 135px;
  resize: vertical;
}

textarea:focus,
select:focus {
  border-color: #55e4dc88;
}

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 18px;
}

.options label {
  font-size: 13px;
  font-weight: 750;
}

.primary,
.secondary {
  width: 100%;
  margin-top: 18px;
  padding: 16px;
  border-radius: 14px;
  font-weight: 900;
  cursor: pointer;
}

.primary {
  color: #061015;
  border: 0;
  background: linear-gradient(100deg, #39d9d1, #8b6cff);
}

.secondary {
  color: #d7e9eb;
  background: #101721;
  border: 1px solid #ffffff16;
}

.features {
  padding: 48px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: 15px;
}

.feature-grid article {
  padding: 19px;
  background: #080e15;
  border: 1px solid #ffffff12;
  border-radius: 17px;
}

.feature-grid h3 {
  margin: 12px 0 7px;
  font-size: 15px;
}

.feature-grid p {
  margin: 0;
  color: #82969c;
  font-size: 12px;
  line-height: 1.55;
}

.result {
  margin-top: 15px;
}

.confidence {
  text-align: right;
}

.confidence strong {
  display: block;
  color: #5de6dd;
  font-size: 30px;
}

.confidence small {
  color: #71878d;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: .12em;
}

.question-card,
.answer-card {
  margin-bottom: 12px;
  padding: 20px;
  border-radius: 16px;
  background: #050a10;
  border: 1px solid #ffffff12;
}

.question-card p {
  margin-bottom: 0;
  color: #d9e9eb;
  line-height: 1.6;
}

.steps {
  display: grid;
  gap: 10px;
}

.step {
  display: flex;
  gap: 18px;
  padding: 19px;
  border-radius: 16px;
  background: #0b1119;
  border: 1px solid #ffffff12;
}

.step > b {
  color: #a47eff;
  font-size: 14px;
}

.step h3 {
  margin: 0 0 7px;
  font-size: 16px;
}

.step p {
  margin: 0;
  color: #899da3;
  line-height: 1.55;
  font-size: 14px;
}

.answer-card {
  margin-top: 12px;
  background: linear-gradient(120deg, #0c292d, #171126);
  border-color: #55e4dc33;
}

.answer-card strong {
  display: block;
  margin-top: 8px;
  font-size: 22px;
}

footer {
  padding: 45px 0 15px;
  color: #5e7278;
  text-align: center;
  font-size: 12px;
}

.hidden {
  display: none !important;
}

@media (max-width: 800px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .app {
    padding: 16px;
  }

  .topbar {
    align-items: flex-start;
    gap: 10px;
  }

  .badge {
    font-size: 9px;
  }

  .hero {
    padding-top: 50px;
  }

  .mode-switch,
  .options {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .panel,
  .result {
    padding: 18px;
  }

  .panel-heading,
  .result-heading {
    align-items: flex-start;
  }
}