:root{
  --fs-bg: #f8fafc;
  --fs-card: #ffffff;
  --fs-text: #020817;
  --fs-muted: rgba(2,8,23,.62);
  --fs-border: rgba(2,8,23,.10);
  --fs-border-strong: rgba(2,8,23,.16);
  --fs-shadow: 0 18px 44px rgba(2,8,23,.08);
  --fs-input-bg: #ffffff;
  --fs-btn-bg: #020817;
  --fs-btn-text: #ffffff;
  --fs-btn-hover: #0f172a;
  --fs-btn-soft-bg: #ffffff;
  --fs-btn-soft-text: #020817;
  --fs-btn-soft-border: rgba(2,8,23,.12);
  --fs-radius-card: 8px;
  --fs-radius-input: 6px;
  --fs-radius-btn: 6px;
  --fs-focus: 0 0 0 3px rgba(2,8,23,.08);
}

*{
  box-sizing:border-box;
}

html,
body{
  margin:0;
  padding:0;
  min-height:100%;
}

body{
  font-family:'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background:var(--fs-bg);
  color:var(--fs-text);
}

.fs-auth-shell{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
}

.fs-auth-card{
  width:100%;
  max-width:520px;
  background:var(--fs-card);
  border:1px solid var(--fs-border);
  border-radius:var(--fs-radius-card);
  box-shadow:var(--fs-shadow);
  padding:26px 24px 22px;
}

.fs-auth-card--login{
  max-width:420px;
}

.fs-auth-logo{
  display:flex;
  justify-content:center;
  margin-bottom:18px;
}

.fs-auth-logo img{
  width:160px;
  max-width:100%;
  height:auto;
  display:block;
}

.fs-auth-title{
  margin:0;
  text-align:center;
  font-size:26px;
  line-height:1.1;
  font-weight:800;
  letter-spacing:-0.03em;
  color:var(--fs-text);
}

.fs-auth-subtitle{
  margin:10px 0 0;
  text-align:center;
  font-size:13px;
  line-height:1.6;
  color:var(--fs-muted);
}

.fs-auth-rules{
  margin:16px 0 0;
  padding:12px 14px;
  border:1px solid var(--fs-border);
  border-radius:var(--fs-radius-input);
  background:#fcfcfd;
  font-size:13px;
  line-height:1.6;
  color:var(--fs-muted);
}

.fs-auth-rules strong{
  color:var(--fs-text);
}

.fs-auth-success{
  margin:16px 0 0;
  padding:12px 14px;
  border:1px solid rgba(34,176,126,.18);
  background:rgba(34,176,126,.06);
  border-radius:var(--fs-radius-input);
  color:#166534;
  font-size:13px;
  line-height:1.5;
  font-weight:700;
}

.fs-auth-error{
  margin:16px 0 0;
  padding:12px 14px;
  border:1px solid rgba(255,64,28,.18);
  background:rgba(255,64,28,.06);
  border-radius:var(--fs-radius-input);
  color:#9f1239;
  font-size:13px;
  line-height:1.5;
  font-weight:700;
}

.fs-auth-form{
  margin-top:20px;
}

.fs-auth-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}

.fs-auth-field{
  display:flex;
  flex-direction:column;
  gap:6px;
}

.fs-auth-field + .fs-auth-field{
  margin-top:14px;
}

.fs-auth-label{
  font-size:12px;
  line-height:1.4;
  font-weight:800;
  color:var(--fs-text);
}

.fs-auth-input{
  width:100%;
  min-height:46px;
  padding:0 14px;
  border:1px solid var(--fs-border-strong);
  border-radius:var(--fs-radius-input);
  background:var(--fs-input-bg);
  color:var(--fs-text);
  font:inherit;
  font-size:14px;
  font-weight:700;
  outline:none;
  transition:border-color .15s ease, box-shadow .15s ease;
}

.fs-auth-input:focus{
  border-color:rgba(2,8,23,.30);
  box-shadow:var(--fs-focus);
}

.fs-auth-input::placeholder{
  color:rgba(2,8,23,.40);
  font-weight:600;
}

.fs-auth-actions{
  margin-top:18px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.fs-auth-actions--stack{
  display:block;
}

.fs-auth-btn{
  min-height:46px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0 16px;
  border-radius:var(--fs-radius-btn);
  font:inherit;
  font-size:14px;
  font-weight:800;
  cursor:pointer;
  text-decoration:none;
  transition:background-color .15s ease, border-color .15s ease, opacity .15s ease;
}

.fs-auth-btn-primary{
  border:1px solid var(--fs-btn-bg);
  background:var(--fs-btn-bg);
  color:var(--fs-btn-text);
}

.fs-auth-btn-primary:hover{
  background:var(--fs-btn-hover);
  border-color:var(--fs-btn-hover);
}

.fs-auth-btn-soft{
  border:1px solid var(--fs-btn-soft-border);
  background:var(--fs-btn-soft-bg);
  color:var(--fs-btn-soft-text);
}

.fs-auth-btn-soft:hover{
  background:#f8fafc;
}

.fs-auth-btn-full{
  width:100%;
}

.fs-auth-foot{
  margin-top:18px;
  text-align:center;
  font-size:12px;
  color:var(--fs-muted);
}

.fs-auth-foot strong{
  color:var(--fs-text);
}