:root {
  color-scheme: dark;
  font-family: "Pretendard", "Noto Sans KR", system-ui, sans-serif;
  background: #071019;
  color: #f8fafc;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 178, 64, 0.16), transparent 36rem),
    radial-gradient(circle at 100% 100%, rgba(28, 121, 166, 0.2), transparent 32rem),
    #071019;
}

.shell {
  width: min(100% - 32px, 880px);
  margin: 0 auto;
  padding: 48px 0;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: center;
}

.badge,
.eyebrow {
  color: #ffbd59;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.hero h1 {
  margin: 16px 0;
  font-size: clamp(36px, 6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.hero p {
  max-width: 360px;
  color: #98a2b3;
  line-height: 1.7;
}

.chat-card {
  padding: 28px;
  border: 1px solid #283544;
  border-radius: 24px;
  background: rgba(11, 18, 27, 0.92);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

.card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.card-heading p,
.card-heading h2 {
  margin: 0;
}

.card-heading h2 {
  margin-top: 4px;
}

.status {
  padding: 7px 11px;
  border-radius: 999px;
  background: #252d38;
  color: #98a2b3;
  font-size: 12px;
  font-weight: 700;
}

.status.active {
  background: rgba(50, 213, 131, 0.13);
  color: #6ce9a6;
}

label {
  display: block;
  margin: 16px 0 8px;
  color: #d0d5dd;
  font-size: 14px;
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid #344054;
  border-radius: 12px;
  outline: none;
  background: #111923;
  color: #f9fafb;
  font: inherit;
  padding: 13px 14px;
}

input:focus,
textarea:focus {
  border-color: #ffbd59;
  box-shadow: 0 0 0 3px rgba(255, 189, 89, 0.12);
}

textarea {
  resize: vertical;
}

.counter {
  margin-top: 5px;
  text-align: right;
  color: #667085;
  font-size: 12px;
}

button {
  width: 100%;
  margin-top: 18px;
  border: 0;
  border-radius: 12px;
  padding: 14px;
  background: #ffbd59;
  color: #15100a;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.feedback {
  min-height: 22px;
  margin: 13px 0 0;
  text-align: center;
  color: #98a2b3;
  font-size: 13px;
}

.feedback.error {
  color: #fda29b;
}

.feedback.success {
  color: #6ce9a6;
}

@media (max-width: 720px) {
  .shell {
    padding: 28px 0;
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 42px;
  }

  .chat-card {
    padding: 22px;
  }
}