:root {
  --bg-1: #f5efe2;
  --bg-2: #e6f1ea;
  --ink: #122025;
  --accent: #d65c2e;
  --accent-2: #1f7a5f;
  --panel: rgba(255, 255, 255, 0.82);
  --line: rgba(18, 32, 37, 0.12);
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Be Vietnam Pro", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 15% 20%, #fff8ec 0%, transparent 50%),
    radial-gradient(circle at 85% 10%, #def4ff 0%, transparent 40%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
  overflow-x: hidden;
}

.bg-shape {
  position: fixed;
  border-radius: 100%;
  filter: blur(8px);
  z-index: 0;
  animation: drift 8s ease-in-out infinite alternate;
}

.bg-shape-1 {
  width: 280px;
  height: 280px;
  background: rgba(214, 92, 46, 0.16);
  top: -80px;
  left: -60px;
}

.bg-shape-2 {
  width: 320px;
  height: 320px;
  background: rgba(31, 122, 95, 0.17);
  right: -70px;
  bottom: -100px;
  animation-delay: 1.2s;
}

.page {
  position: relative;
  z-index: 1;
  width: min(960px, calc(100% - 32px));
  margin: 28px auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}

.intro,
.panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  backdrop-filter: blur(4px);
  background: var(--panel);
  box-shadow: 0 20px 60px rgba(18, 32, 37, 0.08);
}

.intro {
  padding: 34px;
  align-content: center;
}

.kicker {
  margin: 0;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--accent-2);
  font-weight: 700;
}

.intro h1 {
  font-family: "Space Grotesk", sans-serif;
  margin: 10px 0 12px;
  font-size: clamp(1.8rem, 3.2vw, 2.7rem);
  line-height: 1.1;
}

.subtitle {
  margin: 0;
  max-width: 45ch;
  line-height: 1.6;
  color: rgba(18, 32, 37, 0.85);
}

.panel {
  padding: 24px;
}

.exam-form {
  display: grid;
  gap: 14px;
}

.field {
  display: grid;
  gap: 6px;
}

label {
  font-size: 0.92rem;
  font-weight: 600;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.95);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

input:focus {
  outline: none;
  border-color: rgba(214, 92, 46, 0.5);
  box-shadow: 0 0 0 4px rgba(214, 92, 46, 0.14);
}

button {
  margin-top: 8px;
  border: none;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(120deg, var(--accent), #ec8f42);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(214, 92, 46, 0.3);
}

button:disabled {
  opacity: 0.7;
  cursor: wait;
}

.result-card {
  margin-top: 18px;
  padding: 18px;
  border-radius: 16px;
  border: 1px solid rgba(31, 122, 95, 0.2);
  background: linear-gradient(130deg, rgba(31, 122, 95, 0.14), rgba(255, 255, 255, 0.75));
  animation: fadeSlide 0.5s ease;
}

.result-label {
  margin: 0;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(18, 32, 37, 0.7);
}

.rolling-code {
  margin: 8px 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--accent-2);
  text-shadow: 0 10px 24px rgba(31, 122, 95, 0.15);
}

.result-meta {
  margin: 0;
  color: rgba(18, 32, 37, 0.7);
  font-size: 0.92rem;
}

.message {
  margin: 14px 2px 0;
  min-height: 22px;
  font-size: 0.95rem;
  color: var(--danger);
}

.hidden {
  display: none;
}

@keyframes drift {
  from {
    transform: translateY(0) scale(1);
  }
  to {
    transform: translateY(16px) scale(1.04);
  }
}

@keyframes fadeSlide {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 880px) {
  .page {
    grid-template-columns: 1fr;
    margin: 16px auto 24px;
    width: min(700px, calc(100% - 24px));
  }

  .intro,
  .panel {
    border-radius: 20px;
  }
}