:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --ink: #152033;
  --muted: #647085;
  --line: #d9dee8;
  --panel: #ffffff;
  --accent: #1f7a5f;
  --accent-dark: #155a47;
  --danger: #b73535;
  --shadow: 0 18px 45px rgba(38, 48, 70, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(246, 247, 251, 0.72)),
    var(--bg);
  color: var(--ink);
  font-family: Arial, "Noto Sans KR", sans-serif;
}

button,
input {
  font: inherit;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-panel {
  width: min(100%, 420px);
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

h1 {
  margin: 0 0 22px;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: 0;
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 800;
}

.auth-form input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  background: #fbfcff;
  outline: none;
}

.auth-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(31, 122, 95, 0.12);
}

.auth-form button {
  min-height: 46px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 900;
  cursor: pointer;
}

.auth-form button:hover {
  background: var(--accent-dark);
}

.message {
  min-height: 20px;
  margin: 0;
  color: var(--danger);
  font-size: 14px;
  line-height: 1.4;
}

.admin-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.admin-link:hover {
  color: var(--accent-dark);
}

.admin-usage {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.admin-usage-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.admin-usage h2 {
  margin: 0;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: 0;
}

.admin-usage-head button,
.usage-row button {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
}

.usage-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}

.usage-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
}

.usage-row span {
  color: var(--ink);
  font-weight: 800;
}

.usage-row button {
  color: var(--danger);
}