:root {
  --bg: linear-gradient(160deg, #f6f9fc 0%, #e8f3ff 100%);
  --bg-dark: linear-gradient(160deg, #0f1d2f 0%, #122840 100%);
  --text: #1b2a3a;
  --text-dark: #eaf2ff;
  --card: rgba(255, 255, 255, 0.92);
  --card-dark: rgba(10, 20, 36, 0.86);
  --border: rgba(20, 48, 82, 0.14);
  --border-dark: rgba(180, 210, 255, 0.16);
  --primary: #0a7ea4;
  --primary-strong: #085f7b;
  --shadow: 0 16px 40px rgba(20, 40, 70, 0.12);
}

[data-theme='dark'] {
  --text: var(--text-dark);
  --card: var(--card-dark);
  --border: var(--border-dark);
  --bg: var(--bg-dark);
  --shadow: 0 18px 42px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Poppins', 'Noto Sans KR', sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

.page {
  width: min(980px, 100% - 32px);
  margin: 24px auto 60px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--primary-strong);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

nav a {
  text-decoration: none;
  color: var(--text);
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  font-size: 0.92rem;
}

nav a.active {
  border-color: var(--primary);
  color: #fff;
  background: var(--primary);
}

button,
.btn {
  background: var(--primary);
  color: #fff;
  border: 0;
  border-radius: 12px;
  padding: 10px 16px;
  font: inherit;
  cursor: pointer;
}

button:hover,
.btn:hover {
  background: var(--primary-strong);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.hero {
  margin-bottom: 16px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 2rem;
  line-height: 1.25;
}

.hero p {
  margin: 0;
  line-height: 1.7;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 16px 0;
}

.article h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.article h2 a {
  color: var(--primary-strong);
  text-decoration: none;
}

.article h2 a:hover {
  text-decoration: underline;
}

.article p,
.copy {
  margin: 0;
  line-height: 1.7;
  font-size: 0.98rem;
}

.notice {
  margin-top: 16px;
  font-size: 0.9rem;
  opacity: 0.84;
}

.section-title {
  margin: 24px 0 10px;
  font-size: 1.25rem;
}

.ad-card {
  padding: 16px;
  min-height: 120px;
}

form {
  display: grid;
  gap: 10px;
}

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

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.7);
  color: inherit;
  font: inherit;
}

[data-theme='dark'] input,
[data-theme='dark'] select,
[data-theme='dark'] textarea {
  background: rgba(12, 25, 44, 0.85);
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--primary) 65%, white 35%);
  outline-offset: 1px;
}

select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.7);
  color: inherit;
  font: inherit;
}

.doc h1 {
  margin: 0 0 10px;
  font-size: 1.8rem;
}

.doc h2 {
  margin: 20px 0 8px;
  font-size: 1.16rem;
}

.doc-meta {
  margin: 0 0 8px;
  font-size: 0.86rem;
  opacity: 0.8;
}

.list-block {
  margin-top: 10px;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.45);
}

.list-block p {
  margin: 0;
  line-height: 1.7;
}

.list-block p + p {
  margin-top: 6px;
}

.highlight {
  margin-top: 10px;
  padding: 14px;
  border-left: 4px solid var(--primary);
  border-radius: 10px;
  background: rgba(10, 126, 164, 0.08);
  line-height: 1.65;
}

.doc a {
  color: var(--primary-strong);
}

.footer {
  margin-top: 20px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  font-size: 0.88rem;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.footer a {
  color: var(--primary-strong);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

@media (max-width: 760px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero h1 {
    font-size: 1.6rem;
  }
}