/* ===== דף התחברות סטודנטים - user-login.css ===== */
:root{
  --ul-accent:#0d9488;
  --ul-accent-50:#e6f3f2;
  --ul-bg:#f4f7f8;
  --ul-surface:#ffffff;
  --ul-border:#e2e8f0;
  --ul-text:#1e293b;
  --ul-text-soft:#475569;
  --ul-text-mute:#94a3b8;
  --ul-danger:#dc2626;
  --ul-danger-50:#fee2e2;
  --ul-ok:#16a34a;
  --ul-radius:16px;
  --ul-shadow:0 10px 40px rgba(15,23,42,.08);
}

.ul-body{
  margin:0;
  min-height:100vh;
  background:linear-gradient(135deg,var(--ul-bg) 0%,#e9f0ef 100%);
  font-family:'Segoe UI',Tahoma,Arial,sans-serif;
  color:var(--ul-text);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px 16px;
}

.ul-screen{width:100%;}
.ul-hidden{display:none !important;}

.ul-wrap{
  max-width:920px;
  margin:0 auto;
  background:var(--ul-surface);
  border-radius:var(--ul-radius);
  box-shadow:var(--ul-shadow);
  padding:40px 36px 28px;
  position:relative;
  animation:ul-fade .35s ease;
}
.ul-wrap-narrow{max-width:440px;}

@keyframes ul-fade{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

.ul-back{
  position:absolute;
  top:18px; left:18px;
  display:inline-flex;align-items:center;gap:4px;
  background:none;border:none;cursor:pointer;
  color:var(--ul-text-mute);font-size:13px;font-family:inherit;
  padding:6px 8px;border-radius:8px;
  transition:color .15s,background .15s;
}
.ul-back:hover{color:var(--ul-accent);background:var(--ul-accent-50);}

.ul-logo{display:flex;justify-content:center;margin-bottom:14px;}
.ul-logo img{max-height:64px;width:auto;}

.ul-title{margin:0 0 6px;font-size:24px;font-weight:800;text-align:center;color:var(--ul-text);}
.ul-sub{margin:0 0 22px;font-size:14px;text-align:center;color:var(--ul-text-soft);line-height:1.6;}

/* ===== רשת אתרי תרגול ===== */
.sites-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
  gap:18px;
  margin-top:8px;
}
.site-card{
  display:flex;flex-direction:column;
  background:var(--ul-surface);
  border:2px solid var(--ul-border);
  border-radius:14px;
  padding:22px 20px;
  text-align:right;
  cursor:pointer;
  transition:border-color .18s,box-shadow .18s,transform .18s;
}
.site-card:hover{
  border-color:var(--ul-accent);
  box-shadow:0 8px 24px rgba(13,148,136,.14);
  transform:translateY(-3px);
}
.site-card__icon{
  width:48px;height:48px;border-radius:12px;
  background:var(--ul-accent-50);
  display:grid;place-items:center;color:var(--ul-accent);
  margin-bottom:14px;
}
.site-card__name{font-size:17px;font-weight:800;margin:0 0 8px;color:var(--ul-text);}
.site-card__desc{font-size:13px;color:var(--ul-text-soft);line-height:1.6;flex:1;}
.site-card__btn{
  margin-top:16px;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  background:var(--ul-accent);color:#fff;border:none;border-radius:10px;
  padding:10px 16px;font-size:14px;font-weight:700;font-family:inherit;cursor:pointer;
}
.site-card:hover .site-card__btn{background:#0b7a70;}

/* ===== שדות וכפתורים ===== */
.ul-field{margin-bottom:16px;}
.ul-field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:var(--ul-text-soft);}
.ul-field input{
  width:100%;box-sizing:border-box;
  border:1.5px solid var(--ul-border);border-radius:10px;
  padding:12px 14px;font-size:15px;font-family:inherit;
  background:#fbfdff;color:var(--ul-text);outline:none;
  transition:border-color .15s,box-shadow .15s;
}
.ul-field input:focus{border-color:var(--ul-accent);box-shadow:0 0 0 3px var(--ul-accent-50);}

.ul-btn{
  width:100%;margin-top:6px;
  background:var(--ul-accent);color:#fff;border:none;border-radius:12px;
  padding:14px;font-size:16px;font-weight:800;font-family:inherit;cursor:pointer;
  transition:background .15s,transform .05s;
}
.ul-btn:hover{background:#0b7a70;}
.ul-btn:active{transform:scale(.99);}
.ul-btn:disabled{opacity:.6;cursor:wait;}

.ul-link{
  display:block;width:100%;margin-top:14px;
  background:none;border:none;cursor:pointer;font-family:inherit;
  color:var(--ul-accent);font-size:13px;font-weight:700;
  text-align:center;padding:6px;
}
.ul-link:hover{text-decoration:underline;}

/* ===== הודעות ===== */
.ul-msg{
  display:none;
  border-radius:10px;padding:11px 14px;font-size:13px;font-weight:600;
  margin-bottom:16px;line-height:1.5;
}
.ul-msg.show{display:block;}
.ul-msg.err{background:var(--ul-danger-50);color:var(--ul-danger);}
.ul-msg.ok{background:#dcfce7;color:#166534;}

.ul-foot{
  text-align:center;margin-top:26px;font-size:12px;color:var(--ul-text-mute);
}

@media(max-width:560px){
  .ul-wrap{padding:32px 20px 22px;}
  .ul-title{font-size:21px;}
  .sites-grid{grid-template-columns:1fr;}
}