:root {
  --navy: #1b3a4b;
  --gold: #2a9d8f;
  --cream: #f5f7fa;
  --paper: #ffffff;
  --ink: #1a1a1a;
  --muted: #64748b;
  --line: #d3dae2;
  --danger: #9b3b32;
  --font: Kalameh, Tahoma, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { font-weight: 500; }
b, strong { font-weight: 400; }
body {
  font-family: var(--font);
  font-weight: 300;
  min-height: 100vh;
  background:
    radial-gradient(900px 400px at 100% 0%, rgba(42,157,143,.14), transparent 55%),
    var(--cream);
  color: var(--ink);
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(420px, 100%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 26px 24px;
  box-shadow: 0 16px 40px rgba(27, 58, 75, 0.08);
}
.auth-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: var(--navy);
  font-weight: 400;
  text-decoration: none;
}
.auth-brand img { width: 36px; height: 36px; }
.auth-card h1 { margin: 0 0 6px; font-size: 1.25rem; color: var(--navy); }
.auth-card p.sub { margin: 0 0 20px; color: var(--muted); font-size: 0.92rem; }

label { display: grid; gap: 6px; margin-bottom: 12px; font-size: 0.88rem; color: var(--navy); }
input {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  background: #fff;
}
input:focus { outline: 2px solid rgba(var(--gold-rgb, 42, 157, 143), .4); border-color: var(--gold); }

.btn {
  width: 100%;
  border: 0;
  background: var(--navy);
  color: #fff;
  border-radius: 12px;
  padding: 11px 14px;
  font: inherit;
  font-weight: 400;
  cursor: pointer;
  margin-top: 6px;
}
.btn:hover { filter: brightness(1.06); }

.alert {
  background: color-mix(in srgb, var(--danger) 14%, var(--paper, #fff));
  color: var(--danger);
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}
.back { display: block; text-align: center; margin-top: 14px; color: var(--muted); font-size: 0.88rem; text-decoration: none; }
.back:hover { color: var(--navy); }
.alert.ok { background: color-mix(in srgb, var(--ok, #2f6f4e) 14%, var(--paper, #fff)); color: var(--ok, #2f6f4e); }
.auth-links {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.88rem;
}
.auth-links a { color: var(--muted); }
.auth-switch { display: flex; gap: 8px; margin-bottom: 14px; }
.auth-switch a {
  flex: 1;
  text-align: center;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--navy);
}
.auth-switch a.on { background: var(--navy); color: #fff; }
.field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 12px; }
.field-label { font-size: 0.88rem; color: var(--navy); font-weight: 400; }
.auth-idrow {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 10px;
  align-items: start;
}
.auth-idrow .field { margin-bottom: 12px; }
.jalali-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr 0.9fr;
  gap: 8px;
}
@media (max-width: 640px) {
  .auth-idrow { grid-template-columns: 1fr; }
}
.jalali-row select {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 8px;
  background: #fff;
  font: inherit;
}