:root {
  --ink: #14201c;
  --muted: #5c6b64;
  --paper: #f3efe6;
  --panel: #fffdf8;
  --line: #d7d0c3;
  --forest: #1f4d3a;
  --accent: #c45c26;
  --ok: #1f6b45;
  --bad: #9b2c2c;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(31, 77, 58, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(196, 92, 38, 0.12), transparent 50%),
    linear-gradient(160deg, #e8e2d4 0%, var(--paper) 45%, #e4ece7 100%);
}

.shell {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 2rem 1rem 3rem;
}

.brand {
  text-align: center;
  margin-bottom: 1.25rem;
}
.brand-mark {
  margin: 0;
  font-family: Fraunces, Georgia, serif;
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--forest);
}
.brand h1 {
  margin: 0.35rem 0 0;
  font-size: 1.15rem;
  font-weight: 600;
}
.sub {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.panel {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.25rem 1.25rem 1.4rem;
  box-shadow: 0 18px 40px rgba(20, 32, 28, 0.08);
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin-bottom: 1rem;
  background: #efe9dc;
  padding: 0.3rem;
  border-radius: 999px;
}
.tab {
  border: 0;
  background: transparent;
  border-radius: 999px;
  padding: 0.55rem 0.75rem;
  font: inherit;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}
.tab.is-active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.field { margin-bottom: 0.85rem; }
.field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.field input, .field select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  background: #fff;
}
.field input:focus, .field select:focus {
  outline: 2px solid rgba(31, 77, 58, 0.35);
  border-color: var(--forest);
}
.hint, .dev {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.35;
}
.hidden { display: none !important; }
.row { margin: 0.85rem 0; }

.btn {
  width: 100%;
  border: 0;
  border-radius: 11px;
  padding: 0.78rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn.primary { background: var(--forest); color: #f5faf7; }
.btn.accent { background: var(--accent); color: #fff8f3; }
.btn.primary:hover:not(:disabled),
.btn.accent:hover:not(:disabled) { filter: brightness(1.05); }

.msg {
  min-height: 1.3em;
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
}
.msg.ok { color: var(--ok); }
.msg.err { color: var(--bad); }

.google-block { margin-bottom: 0.85rem; }
.btn.google {
  background: #fff;
  color: #1f1f1f;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.btn.google::before {
  content: "";
  width: 18px;
  height: 18px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'%3E%3Cpath fill='%23EA4335' d='M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z'/%3E%3Cpath fill='%234285F4' d='M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z'/%3E%3Cpath fill='%23FBBC05' d='M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z'/%3E%3Cpath fill='%2334A853' d='M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z'/%3E%3C/svg%3E") center/contain no-repeat;
}
.btn.google:hover { background: #f7f7f7; }
.or-sep {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.2rem 0 1rem;
  color: var(--muted);
  font-size: 0.8rem;
}
.or-sep::before, .or-sep::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}
.google-hint { margin-top: 0.45rem; }