:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #eef2f7;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #64748b;
  --line: #cbd5e1;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: #dbeafe;
  --danger: #b42318;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.09), transparent 34%),
    linear-gradient(315deg, rgba(100, 116, 139, 0.14), transparent 42%),
    var(--bg);
  color: var(--ink);
}

button,
input {
  font: inherit;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-panel {
  width: min(100%, 430px);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
}

.brand-row p,
.brand-row h1 {
  margin: 0;
}

.brand-row p {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.brand-row h1 {
  font-size: 26px;
  letter-spacing: 0;
}

.mode-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px;
  margin-bottom: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.mode-tab {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
  cursor: pointer;
}

.mode-tab.active {
  background: var(--panel);
  color: var(--accent-strong);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.12);
}

.auth-form {
  display: none;
  gap: 14px;
}

.auth-form.active {
  display: grid;
}

label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 800;
  color: #334155;
}

input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #ffffff;
  color: var(--ink);
  outline: none;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.13);
}

.primary-button {
  min-height: 44px;
  margin-top: 4px;
  border: 1px solid var(--accent-strong);
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 900;
  cursor: pointer;
}

.primary-button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.status-line {
  min-height: 20px;
  margin: 16px 0 0;
  color: var(--danger);
  font-size: 13px;
  font-weight: 700;
}

.status-line.ok {
  color: var(--accent-strong);
}

@media (max-width: 520px) {
  .auth-shell {
    padding: 14px;
  }

  .auth-panel {
    padding: 22px;
  }
}