:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: rgba(255, 255, 255, 0.96);
  --border: #d6eaf6;
  --border-strong: #9fcfe8;
  --text: #102a43;
  --text-muted: #56748b;
  --accent: #0284c7;
  --accent-strong: #0369a1;
  --accent-soft: rgba(14, 165, 233, 0.11);
  --error: #c52b36;
  --error-soft: rgba(220, 38, 38, 0.09);
  --ring: #0284c7;
  --shadow: 0 28px 70px rgba(14, 116, 161, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 4%, rgba(14, 165, 233, 0.2), transparent 32rem),
    radial-gradient(circle at 90% 12%, rgba(34, 211, 238, 0.16), transparent 29rem),
    linear-gradient(180deg, #f7fcff 0%, var(--bg) 68%);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

.login-shell {
  display: grid;
  min-height: 100dvh;
  padding: 32px 20px;
  place-items: center;
}

.login-card {
  width: min(100%, 440px);
  padding: 38px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.register-card {
  width: min(100%, 480px);
}

.brand-mark {
  display: grid;
  width: 52px;
  height: 52px;
  margin-bottom: 26px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 16px;
  color: #ffffff;
  background: linear-gradient(145deg, #0ea5e9, var(--accent-strong));
  box-shadow: 0 14px 34px rgba(2, 132, 199, 0.25);
}

.brand-mark svg {
  width: 28px;
  height: 28px;
}

.login-heading {
  margin-bottom: 28px;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.login-heading h1 {
  margin: 7px 0 6px;
  font-size: clamp(30px, 7vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.login-heading p,
.security-note {
  margin: 0;
  color: var(--text-muted);
}

.login-form,
.field-group {
  display: grid;
}

.login-form {
  gap: 18px;
}

.field-group {
  gap: 8px;
}

.field-group label {
  font-size: 14px;
  font-weight: 650;
}

.field-group input {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  outline: none;
  color: var(--text);
  background: #ffffff;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.password-field {
  position: relative;
}

.password-field input {
  padding-right: 54px;
}

.password-toggle {
  position: absolute;
  top: 3px;
  right: 3px;
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: 10px;
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
}

.password-toggle:hover {
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.password-toggle:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 1px;
}

.password-toggle svg {
  width: 20px;
  height: 20px;
}

.field-group input:hover {
  border-color: var(--accent);
}

.field-group input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.field-group input[aria-invalid="true"] {
  border-color: var(--error);
  background: var(--error-soft);
}

.form-error,
.form-success {
  margin: -4px 0 0;
  padding: 11px 13px;
  border: 1px solid rgba(197, 43, 54, 0.24);
  border-radius: 10px;
  color: var(--error);
  background: var(--error-soft);
  font-size: 14px;
}

.form-success {
  border-color: rgba(5, 150, 105, 0.24);
  color: #047857;
  background: rgba(16, 185, 129, 0.09);
}

.field-group small {
  color: var(--text-muted);
  font-size: 12px;
}

.auth-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 20px;
  color: var(--text-muted);
  font-size: 14px;
}

.auth-links a {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

.auth-links a:hover {
  text-decoration: underline;
}

.auth-link-disabled {
  color: #8aa0af;
}

.license-details {
  display: grid;
  gap: 12px;
  margin: 0;
}

.license-details div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #f8fcff;
}

.license-details dt {
  color: var(--text-muted);
}

.license-details dd {
  margin: 0;
  font-weight: 700;
  text-align: right;
}

.license-actions {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.license-actions a {
  text-decoration: none;
}

.license-actions form {
  display: grid;
  margin: 0;
}

.shop-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  color: var(--accent-strong);
  background: #fff;
  font-weight: 700;
}

.shop-button.disabled {
  color: var(--text-muted);
  background: #f4f8fa;
}

.license-logout-button {
  width: 100%;
  font: inherit;
  cursor: pointer;
}

.license-logout-button:hover {
  border-color: var(--error);
  color: var(--error);
  background: var(--error-soft);
}

.license-logout-button:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 3px;
}

.login-button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border: 0;
  border-radius: 12px;
  color: #ffffff;
  background: linear-gradient(135deg, #0ea5e9, var(--accent-strong));
  box-shadow: 0 14px 30px rgba(2, 132, 199, 0.22);
  font-weight: 700;
  cursor: pointer;
  transition: background-color 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.login-button:hover {
  box-shadow: 0 16px 34px rgba(2, 132, 199, 0.3);
}

.login-button:active {
  opacity: 0.88;
}

.login-button:disabled {
  opacity: 0.5;
  cursor: wait;
}

.login-button:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 3px;
}

.login-button svg {
  width: 18px;
  height: 18px;
}

.security-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin-top: 24px;
  font-size: 12px;
}

.security-note svg {
  width: 15px;
  height: 15px;
}

@media (max-width: 520px) {
  .login-shell {
    align-items: start;
    padding: 20px 14px;
  }

  .login-card {
    margin-top: 6vh;
    padding: 28px 22px;
    border-radius: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}