@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap');

:root {
  color-scheme: light;
  --ink: #111318;
  --muted: #5F6673;
  --line: #D9DCD7;
  --paper: #FFFFFF;
  --ground: #F0F0EB;
  --indigo: #3730A3;
  --indigo-d: #2E2782;
  --danger: #BE123C;
}

* { box-sizing: border-box; }

body {
  background: var(--ground);
  color: var(--ink);
  font-family: 'DM Sans', Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
}

.topbar {
  align-items: center;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  display: flex;
  height: 58px;
  justify-content: space-between;
  padding: 0 clamp(18px, 4vw, 46px);
}

.brand {
  align-items: center;
  color: inherit;
  display: inline-flex;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand img {
  height: 28px;
  object-fit: contain;
  width: 28px;
}

.is-hidden { display: none; }

nav {
  align-items: center;
  display: flex;
  gap: 8px;
}

nav a {
  align-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink);
  display: inline-flex;
  font-size: 13px;
  font-weight: 500;
  justify-content: center;
  min-height: 36px;
  padding: 0 12px;
  text-decoration: none;
  white-space: nowrap;
}

nav a:hover,
nav a[aria-current="page"] {
  border-color: var(--indigo);
  color: var(--indigo);
}

main {
  align-items: center;
  display: flex;
  flex: 1;
  justify-content: center;
  min-height: 0;
  padding: 32px 20px;
}

.auth-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 32px;
  width: min(100%, 420px);
}

.register-card {
  width: min(100%, 620px);
}

h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 10px;
}

.tagline {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  margin: 0 0 24px;
}

.form-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  color: var(--muted);
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  text-transform: uppercase;
}

input {
  background: var(--ground);
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  margin-bottom: 18px;
  min-height: 42px;
  padding: 10px 12px;
  transition: border-color 0.15s, background 0.15s;
  width: 100%;
}

input:focus {
  background: #fff;
  border-color: var(--indigo);
  outline: none;
}

button {
  background: var(--indigo);
  border: 0;
  border-radius: 3px;
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  min-height: 44px;
  padding: 0 16px;
  transition: background 0.15s;
  width: 100%;
}

button:hover { background: var(--indigo-d); }

.continue-button {
  align-items: center;
  background: var(--indigo);
  border-radius: 3px;
  color: #fff;
  display: flex;
  font-size: 14px;
  font-weight: 700;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  text-decoration: none;
}

.continue-button:hover { background: var(--indigo-d); }

.switch-link {
  color: var(--muted);
  font-size: 14px;
  margin: 18px 0 0;
  text-align: center;
}

.switch-link a {
  color: var(--indigo);
  font-weight: 700;
  text-decoration: none;
}

.switch-link a:hover { text-decoration: underline; }

.form-error {
  background: #FFF1F2;
  border: 1px solid #FECDD3;
  border-radius: 3px;
  color: var(--danger);
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 18px;
  padding: 10px 12px;
}

@media (max-width: 680px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    height: auto;
    padding-bottom: 16px;
    padding-top: 16px;
  }

  nav { width: 100%; }
  nav a { flex: 1 1 auto; }
  main { min-height: auto; }
  .auth-card { padding: 24px; }
  .form-grid { grid-template-columns: 1fr; gap: 0; }
}