:root {
  --bg: #f6f4ef;
  --card: #ffffff;
  --ink: #1f2430;
  --muted: #5b6470;
  --accent: #1e6f50;
  --accent-dark: #175a40;
  --error: #b3261e;
  --ok: #1e6f50;
}

* { box-sizing: border-box; }

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

.card {
  background: var(--card);
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(0,0,0,.08);
  padding: 2rem;
  width: 100%;
  max-width: 26rem;
}

h1 { margin: 0 0 .35rem; font-size: 1.5rem; }
.lede { margin: 0 0 1.25rem; color: var(--muted); font-size: .95rem; }

label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: .35rem; }

input {
  width: 100%;
  padding: .65rem .75rem;
  border: 1px solid #ccd2da;
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }

button {
  margin-top: .75rem;
  width: 100%;
  padding: .7rem;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: var(--accent-dark); }
button:disabled { opacity: .6; cursor: wait; }

.message { margin: 1rem 0 0; font-size: .92rem; border-radius: 8px; padding: .65rem .75rem; }
.message.ok { background: #e7f3ec; color: var(--ok); }
.message.err { background: #fdecea; color: var(--error); }