:root {
  --fa-primary: #1f2937;
  --fa-primary-dark: #111827;
  --fa-accent: #9b6a3d;
  --fa-background: #f5f3ef;
  --fa-surface: #ffffff;
  --fa-surface-muted: #f9fafb;
  --fa-text: #1f2937;
  --fa-muted: #6b7280;
  --fa-border: #e5e7eb;
  --fa-error: #dc2626;
  --fa-error-background: rgba(220, 38, 38, 0.08);
  --fa-radius-sm: 10px;
  --fa-radius-md: 14px;
  --fa-radius-lg: 22px;
  --fa-shadow: 0 20px 60px rgba(17, 24, 39, 0.12);
  --fa-focus-ring: 0 0 0 4px rgba(155, 106, 61, 0.16);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
}

button,
input {
  font: inherit;
}

body {
  color: var(--fa-text);
  background: var(--fa-background);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.auth-button {
  width: 100%;
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--fa-radius-md);
  color: #ffffff;
  background: var(--fa-primary);
  font-weight: 800;
  cursor: pointer;
  transition: transform 120ms ease, background-color 160ms ease, box-shadow 160ms ease;
}
.auth-button:hover {
  background: var(--fa-primary-dark);
}
.auth-button:focus {
  outline: none;
  box-shadow: var(--fa-focus-ring);
}
.auth-button:active {
  transform: translateY(1px);
}

.auth-field {
  margin-bottom: 18px;
}

.auth-label {
  display: block;
  margin-bottom: 7px;
  color: var(--fa-primary-dark);
  font-size: 0.92rem;
  font-weight: 700;
}

.auth-input {
  width: 100%;
  min-height: 52px;
  padding: 0 14px;
  border: 1px solid var(--fa-border);
  border-radius: var(--fa-radius-md);
  color: var(--fa-text);
  background: var(--fa-surface);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}
.auth-input:focus {
  border-color: var(--fa-accent);
  box-shadow: var(--fa-focus-ring);
}
.auth-input::placeholder {
  color: #9ca3af;
}

.auth-check {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 4px 0 24px;
  color: var(--fa-muted);
  font-size: 0.94rem;
}

.auth-checkbox {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--fa-accent);
}

.auth-validation-summary {
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: var(--fa-radius-md);
  color: var(--fa-error);
  background: var(--fa-error-background);
  font-size: 0.92rem;
}
.auth-validation-summary ul {
  margin: 0;
  padding-left: 18px;
}

.auth-field-error {
  display: block;
  margin-top: 7px;
  color: var(--fa-error);
  font-size: 0.86rem;
}

.auth-page {
  min-height: 100vh;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(420px, 1.1fr);
}

.auth-brand-panel {
  display: flex;
  align-items: center;
  padding: 64px;
  color: #ffffff;
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.96), rgba(31, 41, 55, 0.88)), radial-gradient(circle at top left, rgba(155, 106, 61, 0.48), transparent 38%);
}

.auth-brand-content {
  max-width: 540px;
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  margin-bottom: 40px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.auth-brand-panel h1 {
  margin: 0 0 20px;
  font-size: clamp(2.4rem, 4vw, 4.4rem);
  line-height: 0.98;
  font-weight: 850;
  letter-spacing: -0.055em;
}

.auth-brand-panel p {
  margin: 0;
  max-width: 460px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.05rem;
  line-height: 1.7;
}

.auth-meta {
  margin-top: 40px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.auth-form-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 32px;
}

.auth-card {
  width: 100%;
  max-width: 460px;
  padding: 42px;
  border: 1px solid var(--fa-border);
  border-radius: var(--fa-radius-lg);
  background: var(--fa-surface);
  box-shadow: var(--fa-shadow);
}

.auth-title {
  margin: 0;
  color: var(--fa-primary-dark);
  font-size: 2rem;
  line-height: 1.15;
  font-weight: 850;
  letter-spacing: -0.035em;
}

.auth-subtitle {
  margin: 10px 0 0;
  color: var(--fa-muted);
  font-size: 1rem;
  line-height: 1.55;
}

.auth-form {
  margin-top: 30px;
}

.auth-links {
  display: flex;
  justify-content: center;
  margin-top: 22px;
}

.auth-link {
  color: var(--fa-accent);
  font-size: 0.94rem;
  font-weight: 700;
  text-decoration: none;
}
.auth-link:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .auth-shell {
    grid-template-columns: 1fr;
  }
  .auth-brand-panel {
    display: none;
  }
  .auth-form-panel {
    min-height: 100vh;
    padding: 24px;
  }
  .auth-card {
    max-width: 520px;
    padding: 30px 24px;
    box-shadow: none;
  }
}