:root {
  --bg-top: #fff7e0;
  --bg-bottom: #e6f4ff;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --line: #d7dde6;
  --text: #1f2937;
  --muted: #4b5563;
  --primary: #0f766e;
  --primary-strong: #115e59;
  --secondary: #1d4ed8;
  --danger: #b91c1c;
  --ok: #166534;
  --warn: #b45309;
  --ring: 0 0 0 3px rgba(15, 118, 110, 0.25);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--text);
  font-family: "Noto Sans KR", "Nanum Gothic", "Malgun Gothic", sans-serif;
  background: linear-gradient(165deg, var(--bg-top), var(--bg-bottom));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(15, 118, 110, 0.12), transparent 20%),
    radial-gradient(circle at 88% 8%, rgba(29, 78, 216, 0.14), transparent 24%);
  z-index: -1;
}

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

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: 1.6rem;
}

h2 {
  font-size: 1.1rem;
}

.h3 {
  font-size: 1rem;
}

button,
input,
select,
textarea {
  font: inherit;
}

:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

.site-header {
  width: min(1120px, calc(100% - 2rem));
  margin: 1.2rem auto 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(4px);
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.site-nav a {
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.38rem 0.75rem;
  color: var(--muted);
  transition: all 150ms ease;
}

.site-nav a:hover {
  border-color: var(--line);
  background: var(--surface-soft);
}

.site-nav a.is-active {
  border-color: transparent;
  background: var(--primary);
  color: #ffffff;
}

.page {
  width: min(1120px, calc(100% - 2rem));
  margin: 1rem auto 1.6rem;
  display: grid;
  gap: 1rem;
}

.panel {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: clamp(1rem, 3vw, 1.5rem);
  box-shadow: 0 16px 28px rgba(16, 24, 40, 0.06);
  animation: rise-in 220ms ease;
}

.notice-area {
  display: grid;
  gap: 0.75rem;
}

.row-between {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.muted {
  color: var(--muted);
}

.hint {
  color: var(--muted);
  font-size: 0.95rem;
}

.stack-sm {
  display: grid;
  gap: 0.45rem;
}

.stack-md {
  display: grid;
  gap: 0.8rem;
}

.stack-lg {
  display: grid;
  gap: 1rem;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 760px) {
  .site-header,
  .page {
    width: calc(100% - 1rem);
  }

  h1 {
    font-size: 1.4rem;
  }

  .site-nav a {
    padding-inline: 0.6rem;
  }
}