:root {
  --bg: #0f172a;
  --card: #1e293b;
  --accent: #38bdf8;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --danger: #f87171;
  --success: #4ade80;
  --warning: #fbbf24;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, #1e293b, var(--bg));
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  padding: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 16px;
  padding: 2.5rem;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.subtitle { color: var(--muted); margin: 0 0 1.5rem; font-size: 0.9rem; }

label {
  display: block;
  margin: 1rem 0 0.35rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: #0f172a;
  color: var(--text);
  font-size: 1rem;
}

input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }

button {
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.8rem;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #082f49;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.05s ease, filter 0.15s ease;
}

button:hover { filter: brightness(1.08); }
button:active { transform: translateY(1px); }

.btn-secondary { background: #334155; color: var(--text); }

.panel {
  background: #0f172a;
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 1rem 0 1.5rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

code {
  background: #334155;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  font-size: 0.85em;
}

.flashes { margin-bottom: 1rem; }
.flash {
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}
.flash-danger  { background: rgba(248, 113, 113, 0.15); color: var(--danger); }
.flash-success { background: rgba(74, 222, 128, 0.15); color: var(--success); }
.flash-warning { background: rgba(251, 191, 36, 0.15); color: var(--warning); }