:root {
  --bg: #eef3f7;
  --panel: #ffffff;
  --line: #d6dee7;
  --line-soft: #e5ebf1;
  --head: #f7fafc;
  --text: #223445;
  --text-2: #536678;
  --text-3: #78899a;
  --primary: #2f768f;
  --primary-dark: #275f73;
  --primary-deep: #1f3e5a;
  --danger: #b24d47;
  --danger-bg: #fbefed;
  --danger-line: #ebc9c4;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
body {
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f5f8fb 0%, #eef3f7 100%);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  border: 1px solid #cbd6e0;
  border-radius: 8px;
  background: var(--panel);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(20, 37, 54, 0.08);
}

.login-card__head {
  padding: 18px 22px 16px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, #f8fbfe 0%, #eef4f9 100%);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.login-brand__logo {
  width: 100px;
  height: auto;
  flex: 0 0 auto;
}

.login-brand__text {
  flex: 1;
}

.login-brand h1 {
  margin: 2px 0;
  color: #19324b;
  font-size: 31px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.045em;
}

.login-head-desc {
  margin: 6px 0 0 2px;
  color: #5d7083;
  font-size: 13px;
  line-height: 1.55;
  letter-spacing: -0.01em;
}

.login-brand p {
  margin: 8px 0 0;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.55;
  letter-spacing: -0.01em;
}

.login-card__body {
  padding: 22px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row label {
  display: block;
  margin-bottom: 7px;
  color: #32485b;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.form-row input {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid #c7d3de;
  border-radius: 4px;
  background: #fff;
  color: var(--text);
  font: inherit;
  outline: none;
}

.form-row input::placeholder {
  color: #8b9aaa;
}

.form-row input:focus {
  border-color: #93afbf;
  box-shadow: 0 0 0 3px rgba(47, 118, 143, 0.1);
}

.check-inline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-2);
  font-size: 12px;
  line-height: 1.4;
}

.login-option .login-help {
  margin: 0 0 0 24px;
  color: var(--danger);
  font-size: 11px;
  line-height: 1.4;
}

.login-action {
  margin-top: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: 4px;
  font: inherit;
  font-weight: 800;
  letter-spacing: -0.01em;
  cursor: pointer;
}

.btn--block {
  width: 100%;
}

.btn--primary {
  background: linear-gradient(180deg, #377995 0%, #2d6982 100%);
  border-color: #24566a;
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.btn--primary:hover {
  background: linear-gradient(180deg, #326f89 0%, #295f75 100%);
}

.alert {
  margin-bottom: 14px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.55;
}

.alert--danger {
  background: var(--danger-bg);
  border-color: var(--danger-line);
  color: #8f3f3a;
}

.login-note {
  margin-top: 18px;
  padding: 13px 14px;
  border: 1px solid #dde6ee;
  border-radius: 4px;
  background: #f8fbfd;
}

.login-note strong {
  display: block;
  margin-bottom: 4px;
  color: #3a5063;
  font-size: 12px;
}

.login-note p {
  margin: 0 0 6px;
  color: var(--text-2);
  font-size: 12px;
}

.login-note__link {
  display: inline-block;
  color: var(--primary-deep);
  font-size: 12px;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.login-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 22px;
  border-top: 1px solid var(--line-soft);
  background: #fbfcfd;
  color: var(--text-3);
  font-size: 11px;
}

@media (max-width: 640px) {
  .login-shell {
    padding: 20px 14px;
  }

  .login-card {
    max-width: 100%;
  }

  .login-brand {
    gap: 12px;
  }

  .login-brand__logo {
    width: 88px;
  }

  .login-brand h1 {
    font-size: 27px;
  }

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