:root {
  --bg: #1f2329;
  --surface: #2a2f36;
  --text: #eef2f7;
  --muted: #aab4c3;
  --primary: #66c7ff;
  --primary-dark: #42b6ff;
  --accent-pink: #ff77b7;
  --line: #3b4350;
  --ok: #183a2f;
  --warn: #3f3520;
  --danger: #4a2330;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Pretendard", "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--text);
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(31, 35, 41, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 64px;
}

.logo {
  font-weight: 800;
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.hero {
  padding: 56px 0 44px;
  background: linear-gradient(180deg, #242a33 0%, #1f2329 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(102, 199, 255, 0.18);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.hero h1 {
  margin: 12px 0;
  font-size: 34px;
  line-height: 1.3;
}

.hero-desc {
  color: var(--muted);
  line-height: 1.7;
}

.cta {
  display: inline-block;
  margin-top: 14px;
  padding: 11px 16px;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--primary), var(--accent-pink));
  color: #101418;
  font-weight: 800;
}

.cta:hover {
  filter: brightness(1.05);
}

.hero-card,
.info-card,
.feature-card,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}

.hero-card ul {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.section {
  padding: 36px 0;
}

.section h2 {
  margin: 0 0 14px;
}

.section.alt {
  background: #242a33;
  border-top: 1px solid #313949;
  border-bottom: 1px solid #313949;
}

.feature-grid,
.success-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.feature-card h3 {
  margin-top: 0;
}

.feature-card p {
  color: var(--muted);
  line-height: 1.6;
}

.sub {
  color: var(--muted);
  margin-bottom: 14px;
}

.demo-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 14px;
}

.consult-card {
  grid-column: 1 / -1;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
}

input,
select,
button {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  font-size: 14px;
}

button {
  background: var(--primary);
  color: #101418;
  border: none;
  cursor: pointer;
}

.form-grid button {
  grid-column: 1 / -1;
}

.status-box {
  border-radius: 10px;
  padding: 12px;
  margin: 10px 0;
  border: 1px solid transparent;
}

.status-box.good {
  background: var(--ok);
  border-color: #34d399;
}

.status-box.warn {
  background: var(--warn);
  border-color: #f59e0b;
}

.status-box.danger {
  background: var(--danger);
  border-color: #ef4444;
}

.status-box.neutral {
  background: #2a3344;
  border-color: #66c7ff;
  color: var(--text);
}

.result-section h4 {
  margin-bottom: 8px;
}

.result-section ul {
  margin: 0;
  padding-left: 18px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  margin-top: 10px;
}

.day-cell {
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 68px;
  padding: 6px;
  font-size: 12px;
  background: #303844;
  color: var(--text);
}

.day-cell .date {
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--primary);
}

.day-cell.good {
  background: #1f3a33;
}

.day-cell.warn {
  background: #3a3324;
}

.day-cell.danger {
  background: #472a33;
}

.chat-box {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  min-height: 180px;
  max-height: 260px;
  overflow-y: auto;
  background: #252c35;
}

.chat {
  margin-bottom: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  width: fit-content;
  max-width: 90%;
  line-height: 1.4;
  color: var(--text);
}

.chat.user {
  margin-left: auto;
  background: #2b4357;
}

.chat.bot {
  background: #343c47;
}

.chat-form {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.chat-form input {
  flex: 1;
}

.site-footer {
  padding: 20px 0 30px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero-grid,
  .demo-layout,
  .feature-grid,
  .success-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 28px;
  }

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