:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --card: #161a22;
  --text: #f2f4f8;
  --muted: #a8b0c0;
  --accent: #3b82f6;
  --accent-d: #2563eb;
  --danger: #f87171;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right))
    max(16px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  background: radial-gradient(1200px 600px at 50% -10%, #1e293b 0%, var(--bg) 55%);
  color: var(--text);
}

.panel {
  width: min(420px, 100%);
  background: var(--card);
  border-radius: 20px;
  padding: 28px 22px 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.brand {
  text-align: center;
  margin-bottom: 22px;
}

.logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 10px;
  border-radius: 16px;
  background: linear-gradient(145deg, #38bdf8, var(--accent));
  display: grid;
  place-items: center;
  font-size: 26px;
  font-weight: 700;
}

h1 {
  margin: 0 0 6px;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.muted {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 0.92rem;
}

.field span {
  color: var(--muted);
}

input {
  appearance: none;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 14px 14px;
  font-size: 1.05rem;
}

input:focus {
  outline: 2px solid rgba(59, 130, 246, 0.55);
  outline-offset: 2px;
}

.btn {
  width: 100%;
  border: none;
  border-radius: 14px;
  padding: 14px 16px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
}

.btn.primary {
  background: linear-gradient(180deg, var(--accent), var(--accent-d));
  color: #fff;
}

.btn.primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.error {
  color: var(--danger);
  font-size: 0.92rem;
  margin: 0 0 10px;
}