@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #ececee;
  --text: #0a0a0f;
  --text-muted: #5a5a6a;
  --text-light: #9a9aa5;
  --accent: #e8d91a;
  --accent-hover: #d4c512;
  --red: #ef4444;
  --red-bg: #fef2f2;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-md: 0 4px 14px -4px rgba(15,15,25,.08), 0 2px 6px -2px rgba(15,15,25,.04);
  --shadow-lg: 0 20px 40px -12px rgba(15,15,25,.12), 0 8px 16px -8px rgba(15,15,25,.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  letter-spacing: -.01em;
}

.login-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 18px;
  background:
    radial-gradient(1200px 600px at 20% -20%, rgba(232,217,26,.22), transparent 60%),
    radial-gradient(900px 500px at 110% 120%, rgba(59,130,246,.12), transparent 60%),
    var(--bg);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 32px 28px 28px;
}

.login-brand {
  text-align: center;
  margin-bottom: 24px;
}
.brand-mark {
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -.03em;
  color: var(--text);
}
.brand-mark::after {
  content: '';
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: 8px;
  vertical-align: middle;
  box-shadow: 0 0 0 4px rgba(232,217,26,.2);
}
.brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: .04em;
  text-transform: uppercase;
}

form { display: flex; flex-direction: column; gap: 14px; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field span {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -.01em;
}
.field input {
  font-family: inherit;
  font-size: 14px;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(232,217,26,.2);
}

#submit {
  margin-top: 6px;
  padding: 12px 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--text);
  color: #fff;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: -.01em;
  cursor: pointer;
  transition: background .15s, transform .08s;
}
#submit:hover:not(:disabled) { background: #1a1a22; }
#submit:active:not(:disabled) { transform: translateY(1px); }
#submit:disabled { opacity: .6; cursor: not-allowed; }

.error {
  font-size: 12.5px;
  color: var(--red);
  background: var(--red-bg);
  border: 1px solid #fecaca;
  border-radius: 8px;
  padding: 8px 10px;
}