:root {
  --login-bg: #06131d;
  --login-panel: rgba(10, 26, 38, 0.88);
  --login-panel-border: rgba(148, 163, 184, 0.18);
  --login-text: #f8fafc;
  --login-muted: #cbd5e1;
  --login-accent: #38bdf8;
  --login-input-bg: rgba(15, 23, 42, 0.72);
  --login-input-border: rgba(148, 163, 184, 0.22);
  --login-danger: #fca5a5;
  --login-shadow: rgba(2, 8, 23, 0.44);
}

* {
  box-sizing: border-box;
}

body.login-page {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  color: var(--login-text);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.24), transparent 38%),
    radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.18), transparent 36%),
    linear-gradient(135deg, #081019 0%, #06131d 42%, #0d2230 100%);
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-panel {
  width: min(100%, 460px);
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 36px;
  border: 1px solid var(--login-panel-border);
  border-radius: 28px;
  background: var(--login-panel);
  box-shadow: 0 28px 56px var(--login-shadow);
  backdrop-filter: blur(18px);
}

.login-copy {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.login-copy h1 {
  margin: 0;
  font-size: 31px;
  line-height: 1.2;
}

.login-copy p {
  margin: 0;
  color: var(--login-muted);
  line-height: 1.6;
}

.login-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.14);
  color: var(--login-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.login-dev-credentials {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  border: 1px solid rgba(56, 189, 248, 0.26);
  border-radius: 14px;
  background: rgba(56, 189, 248, 0.1);
}

.login-dev-label {
  color: var(--login-muted);
  font-size: 12px;
  font-weight: 700;
}

.login-dev-value {
  color: var(--login-text);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.login-field span {
  font-size: 13px;
  font-weight: 700;
}

.login-field input {
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--login-input-border);
  border-radius: 14px;
  background: var(--login-input-bg);
  color: var(--login-text);
  font-size: 15px;
}

.login-field input:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.64);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}

.login-submit {
  min-height: 52px;
  border: none;
  border-radius: 16px;
  background: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);
  color: #04131d;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
}

.login-alert {
  padding: 12px 14px;
  border: 1px solid rgba(252, 165, 165, 0.28);
  border-radius: 14px;
  background: rgba(127, 29, 29, 0.28);
  color: var(--login-danger);
  line-height: 1.5;
}

@media (max-width: 640px) {
  .login-shell {
    padding: 16px;
  }

  .login-panel {
    padding: 28px 22px;
    border-radius: 22px;
  }

  .login-copy h1 {
    font-size: 26px;
  }
}