:root {
  --auth-blue: #8b95f2;
  --auth-blue-deep: #7a85e8;
  --auth-ink: #2a3142;
  --auth-muted: #8b93a7;
  --auth-field: #eef0f8;
  --auth-bg: #f3f4f8;
  --auth-dot: rgba(42, 49, 66, 0.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Be Vietnam Pro", sans-serif;
  color: var(--auth-ink);
  background-color: var(--auth-bg);
  background-image: radial-gradient(var(--auth-dot) 1px, transparent 1px);
  background-size: 18px 18px;
  line-height: 1.45;
}
a { color: var(--auth-blue-deep); text-decoration: none; }
.auth-wrap {
  width: min(100% - 1.5rem, 420px);
  margin: 1.25rem auto 2rem;
}
.auth-card {
  background: #fff;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 18px 50px rgba(40, 48, 80, 0.12);
}
.auth-hero {
  background: var(--auth-blue);
  color: #fff;
  text-align: center;
  padding: 2.2rem 1.4rem 2.6rem;
  border-bottom-left-radius: 48% 28%;
  border-bottom-right-radius: 48% 28%;
}
.auth-hero h1 {
  margin: 0;
  font-size: clamp(1.7rem, 5vw, 2.1rem);
  letter-spacing: -0.02em;
  font-weight: 800;
}
.auth-hero p {
  margin: 0.45rem 0 1.1rem;
  opacity: 0.92;
  font-size: 0.98rem;
}
.auth-hero .btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 8.5rem;
  padding: 0.65rem 1.3rem;
  border-radius: 999px;
  border: 1.5px solid rgba(255,255,255,0.9);
  color: #fff;
  font-weight: 700;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
}
.auth-body {
  padding: 1.6rem 1.35rem 1.8rem;
}
.auth-body h2 {
  margin: 0 0 1.15rem;
  text-align: center;
  font-size: 1.85rem;
  letter-spacing: -0.02em;
  color: var(--auth-ink);
}
.field {
  position: relative;
  margin-bottom: 0.85rem;
}
.field input {
  width: 100%;
  border: 0;
  outline: none;
  background: var(--auth-field);
  border-radius: 14px;
  padding: 0.95rem 2.8rem 0.95rem 1rem;
  font: inherit;
  color: var(--auth-ink);
}
.field input::placeholder { color: #9aa3b5; }
.field .icon {
  position: absolute;
  right: 0.95rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.25rem;
  height: 1.25rem;
  color: #98a1b5;
  pointer-events: none;
}
.auth-extra {
  display: flex;
  justify-content: flex-end;
  margin: 0.15rem 0 1rem;
}
.auth-extra button, .auth-extra a {
  appearance: none;
  border: 0;
  background: none;
  color: var(--auth-muted);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  padding: 0;
}
.btn-auth {
  width: 100%;
  appearance: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  color: #fff;
  background: var(--auth-blue);
  border-radius: 999px;
  padding: 0.95rem 1rem;
  margin-top: 0.35rem;
}
.btn-auth:hover { background: var(--auth-blue-deep); }
.btn-auth.ghost {
  background: transparent;
  color: var(--auth-blue-deep);
  border: 1.5px solid rgba(139, 149, 242, 0.55);
  margin-top: 0.65rem;
}
.msg {
  margin-top: 0.85rem;
  font-size: 0.9rem;
  text-align: center;
  white-space: pre-wrap;
}
.msg.ok { color: #1f9d62; }
.msg.bad { color: #d64545; }
.otp-box[hidden] { display: none !important; }
.back-home {
  display: block;
  text-align: center;
  margin-top: 1rem;
  color: var(--auth-muted);
  font-size: 0.9rem;
}