:root {
  --primary-blue: #0265dc;
  --primary-hover: #0054b8;
  --text-main: #2c2c2c;
  --text-muted: #747474;
  --border-color: #d1d1d1;
  --bg-color: #f8f8f8;
  --card-bg: #ffffff;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  color: var(--text-main);
}

.login-card {
  background: var(--card-bg);
  width: 100%;
  max-width: 450px;
  padding: 48px 40px;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.logo {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.logo img {
  width: auto;
  height: 48px;
  max-width: 100%;
  object-fit: contain;
}

h1 {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.subtitle {
  text-align: center;
  font-size: 15px;
  color: var(--text-main);
  margin-bottom: 32px;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
.remember-me input:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 3px;
}

.form-group {
  margin-bottom: 20px;
  position: relative;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input[aria-invalid="true"] {
  border-color: #d32f2f;
}

.form-group input:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 1px var(--primary-blue);
}

.field-hint {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
}

.password-criteria {
  display: grid;
  gap: 6px;
  list-style: none;
}

.password-criteria li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.password-rule-mark {
  flex: 0 0 10px;
  height: 10px;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.password-criteria .is-valid .password-rule-mark {
  background: currentColor;
}

.password-criteria .is-invalid .password-rule-mark {
  border-style: dashed;
}

.password-criteria .is-valid,
.field-hint.is-valid { color: #21633b; }
.password-criteria .is-invalid,
.field-hint.is-invalid { color: #a32121; }

.auth-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.remember-me {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  cursor: pointer;
}

.remember-me input {
  width: 16px;
  height: 16px;
  accent-color: var(--primary-blue);
}

.btn-primary {
  position: relative;
  width: 100%;
  padding: 14px;
  background-color: var(--primary-blue);
  color: white;
  border: none;
  border-radius: 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
  margin-top: 8px;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-primary:disabled {
  background-color: #a0c4f2;
  cursor: not-allowed;
}

.spinner {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -10px 0 0 -10px;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

.is-loading .btn-text {
  visibility: hidden;
}

.is-loading .spinner {
  display: block;
}

.recovery-link {
  text-align: center;
  font-size: 14px;
  line-height: 1.5;
  margin-top: 24px;
}

.notice {
  padding: 12px 16px;
  margin-bottom: 20px;
  border: 1px solid;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.notice ul {
  padding-left: 16px;
}

.notice--error {
  color: #a32121;
  background: #fff3f3;
  border-color: #f3c4c4;
}

.notice--success {
  color: #21633b;
  background: #f1faf4;
  border-color: #bdddc7;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 480px) {
  body { background-color: var(--card-bg); }
  .login-card {
    box-shadow: none;
    padding: 32px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
  .form-group input,
  .btn-primary { transition: none; }
}