:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --border: #2a2a2a;
  --accent: #FF7A1A;
  --accent-hover: #E8660A;
  --text: #f5f5f5;
  --text-dim: #9a9a9a;
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(circle at 50% 0%, #201409 0%, var(--bg) 55%);
  color: var(--text);
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
}

.brand-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--text);
  line-height: 1;
  margin-bottom: 28px;
}
.brand-logo-word {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
}
.brand-logo-arc { color: var(--accent); margin-top: 4px; }

.card {
  width: 100%;
  max-width: 380px;
  background: rgba(26, 26, 26, 0.7);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.card h1 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 6px;
  text-align: center;
}
.card .subtitle {
  color: var(--text-dim);
  font-size: 14px;
  text-align: center;
  margin: 0 0 24px;
}

.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: #1a1a1a;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
}
.google-btn:hover { background: #f3f3f3; }
.google-btn.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-dim);
  font-size: 12px;
  margin: 20px 0;
}
.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin: 14px 0 6px;
}
input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #111;
  color: var(--text);
  font-size: 14px;
}
input:focus { outline: 1px solid var(--accent); border-color: var(--accent); }

button.primary {
  width: 100%;
  margin-top: 22px;
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #101010;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
}
button.primary:hover { background: var(--accent-hover); }
button.primary:disabled { opacity: 0.6; cursor: default; }

.error {
  display: none;
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 90, 90, 0.1);
  border: 1px solid rgba(255, 90, 90, 0.35);
  color: #ff9a9a;
  font-size: 13px;
}
.error.show { display: block; }

.switch {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-dim);
}
.switch a { color: var(--accent); text-decoration: none; font-weight: 600; }
.switch a:hover { text-decoration: underline; }