/* AgroPatentIndex · auth screens · matching design system */
:root {
  --n-0: oklch(1.000 0 0);
  --n-50:  oklch(0.985 0.002 240);
  --n-100: oklch(0.970 0.003 240);
  --n-200: oklch(0.930 0.004 240);
  --n-300: oklch(0.880 0.006 240);
  --n-500: oklch(0.550 0.012 240);
  --n-700: oklch(0.355 0.010 240);
  --n-900: oklch(0.205 0.010 240);
  --n-950: oklch(0.145 0.008 240);
  --t-50:  oklch(0.970 0.018 175);
  --t-500: oklch(0.620 0.095 175);
  --t-700: oklch(0.480 0.095 175);
  --t-800: oklch(0.395 0.080 175);
  --r-100: oklch(0.920 0.055 25);
  --r-700: oklch(0.505 0.180 25);
  --a-100: oklch(0.935 0.060 75);
  --a-800: oklch(0.440 0.125 55);
  --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px; --s-6: 32px; --s-7: 48px;
  --radius-sm: 6px; --radius-md: 8px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--n-50);
  color: var(--n-900);
  font-size: 14px;
  line-height: 1.55;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--s-5);
  -webkit-font-smoothing: antialiased;
}

.auth-shell {
  width: 100%;
  max-width: 420px;
  background: var(--n-0);
  border: 1px solid var(--n-200);
  border-radius: 12px;
  padding: var(--s-7) var(--s-6) var(--s-6);
  box-shadow: 0 1px 2px rgba(0,0,0,0.03), 0 8px 24px rgba(0,0,0,0.04);
}

.brand-row {
  display: flex; align-items: center; gap: var(--s-3);
  margin-bottom: var(--s-6);
}
.brand-mark {
  width: 50px; height: 28px;
  color: var(--n-950);
  display: inline-flex; align-items: center; justify-content: center;
}
.brand-mark svg { display: block; width: 100%; height: 100%; }
.brand-name { font-weight: 600; font-size: 14px; letter-spacing: -0.01em; }
.brand-name em { font-style: normal; color: var(--n-500); font-weight: 500; }
.brand-accent { color: #2f5d3a; font-weight: 500; }

h1 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 var(--s-2);
}
.subtitle {
  color: var(--n-500);
  font-size: 13px;
  margin: 0 0 var(--s-6);
}

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--s-4); }
.field label {
  font-size: 12px;
  font-weight: 500;
  color: var(--n-700);
  letter-spacing: 0.01em;
}
.field input {
  font-family: inherit;
  font-size: 14px;
  padding: 10px 12px;
  border: 1px solid var(--n-300);
  border-radius: var(--radius-sm);
  background: var(--n-0);
  color: var(--n-900);
  transition: border-color 120ms, box-shadow 120ms;
}
.field input:focus {
  outline: none;
  border-color: var(--t-700);
  box-shadow: 0 0 0 3px oklch(0.480 0.095 175 / 0.18);
}
.field .hint {
  font-size: 11px;
  color: var(--n-500);
}

.btn {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 120ms, border-color 120ms;
}
.btn-primary {
  background: var(--n-950);
  color: var(--n-0);
}
.btn-primary:hover:not(:disabled) { background: var(--n-900); }
.btn-secondary {
  background: var(--n-0);
  color: var(--n-900);
  border-color: var(--n-300);
}
.btn-secondary:hover:not(:disabled) { background: var(--n-50); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.divider {
  display: flex; align-items: center; gap: var(--s-3);
  color: var(--n-500); font-size: 11px;
  margin: var(--s-5) 0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--n-200);
}

.foot {
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--n-200);
  font-size: 12px;
  color: var(--n-500);
  text-align: center;
}
.foot a {
  color: var(--t-700);
  text-decoration: none;
  font-weight: 500;
}
.foot a:hover { text-decoration: underline; text-underline-offset: 3px; }

.alert {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: var(--s-4);
  display: none;
}
.alert.show { display: block; }
.alert-error {
  background: var(--r-100);
  color: var(--r-700);
  border: 1px solid var(--r-700);
  border-color: oklch(0.505 0.180 25 / 0.3);
}
.alert-success {
  background: var(--t-50);
  color: var(--t-800);
  border: 1px solid oklch(0.480 0.095 175 / 0.3);
}
.alert-warning {
  background: var(--a-100);
  color: var(--a-800);
  border: 1px solid oklch(0.520 0.130 75 / 0.3);
}

.note {
  margin-top: var(--s-5);
  padding: var(--s-3);
  background: var(--n-50);
  border: 1px solid var(--n-200);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--n-500);
  line-height: 1.5;
}
.note strong { color: var(--n-700); }

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: var(--s-5);
  padding: 4px;
  background: var(--n-100);
  border-radius: var(--radius-sm);
}
.tab {
  flex: 1;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 4px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--n-500);
  cursor: pointer;
  transition: background 120ms, color 120ms;
}
.tab.active {
  background: var(--n-0);
  color: var(--n-900);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}