@font-face {
  font-family: "Pretendard";
  src: url("https://cdn.jsdelivr.net/gh/projectnoonnu/pretendard@1.0/Pretendard-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Pretendard";
  src: url("https://cdn.jsdelivr.net/gh/projectnoonnu/pretendard@1.0/Pretendard-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  --ink: #242424;
  --muted: #71777c;
  --line: #d8dddf;
  --paper: #ffffff;
  --soft: #f3f5f5;
  --accent: #242424;
  font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #f8f9f9;
  color: var(--ink);
}

button,
input,
textarea {
  font: inherit;
}

a {
  color: inherit;
}

.support-shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 30px 0 56px;
}

.support-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 28px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
}

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

.nav-links a,
button,
.support-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  padding: 8px 12px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.nav-links a:hover,
button:hover,
.support-button:hover {
  border-color: var(--accent);
}

.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.support-card {
  display: grid;
  gap: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  padding: clamp(24px, 5vw, 54px);
  box-shadow: 0 24px 70px rgba(50, 55, 58, 0.08);
}

.eyebrow {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  font-size: 20px;
}

.lead {
  max-width: 680px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.qr-card {
  display: grid;
  justify-items: center;
  gap: 14px;
  width: min(100%, 420px);
  margin: 4px 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  padding: 18px;
}

.qr-card.compact {
  width: 100%;
}

.qr-card img {
  display: block;
  width: min(100%, 300px);
  height: auto;
  border-radius: 12px;
}

.qr-card figcaption {
  width: 100%;
  border-radius: 12px;
  background: var(--soft);
  padding: 12px 14px;
  text-align: center;
  font-size: 20px;
  font-weight: 800;
}

.support-button[aria-disabled="true"] {
  color: #a2a8ad;
  cursor: default;
  background: #f6f7f7;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.info-box {
  display: grid;
  gap: 8px;
  min-height: 120px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--soft);
  padding: 16px;
}

.info-box small {
  color: var(--muted);
  font-weight: 800;
}

.admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 18px;
}

.form-panel,
.preview-panel {
  display: grid;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  padding: 22px;
}

label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 900;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
}

textarea {
  min-height: 110px;
  resize: vertical;
  line-height: 1.6;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(36, 36, 36, 0.09);
}

.hint {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.status {
  min-height: 20px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

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

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

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