@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');

:root{
  --bg:#f0f0f0;
  --card:#ffffff;
  --field:#f4f4f4;
  --border:#d4d4d4;
  --accent:#171717;
  --text:#111111;
  --muted:#6b7280;
  --danger:#ef4444;
  --success:#16a34a;
}

*{ box-sizing:border-box; margin:0; padding:0; }

html,body{
  height:100%;
  font-family:'Poppins', 'Segoe UI', sans-serif;
  color:var(--text);
}

body{
  display:flex;
  align-items:center;
  justify-content:center;
  background:
    radial-gradient(900px 480px at 15% -10%, #e5e5e5 0%, transparent 60%),
    radial-gradient(700px 420px at 110% 10%, #ececec 0%, transparent 55%),
    var(--bg);
}

/* Card */
.card{
  width:380px;
  max-width:92vw;
  padding:36px 32px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:10px;
  box-shadow:0 18px 44px rgba(15,23,42,0.08);
}

.logo{
  width:52px; height:52px;
  margin:0 auto 14px;
  border-radius:10px;
  background:linear-gradient(135deg, var(--accent), #525252);
  display:flex; align-items:center; justify-content:center;
  font-size:24px;
}

h1{
  text-align:center;
  font-size:21px;
  font-weight:600;
}
.subtitle{
  text-align:center;
  color:var(--muted);
  font-size:13px;
  margin-top:4px;
  margin-bottom:22px;
}

/* Tabs */
.tabs{
  display:flex;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:8px;
  padding:3px;
  margin-bottom:22px;
  position:relative;
}
.tabs button{
  flex:1;
  background:transparent;
  border:none;
  color:var(--muted);
  font-size:13.5px;
  font-weight:600;
  padding:8px 0;
  cursor:pointer;
  border-radius:6px;
  position:relative;
  z-index:1;
}
.tabs button.active{ color:#fff; }
.tab-indicator{
  position:absolute;
  top:3px; bottom:3px; left:3px;
  width:calc(50% - 3px);
  background:var(--accent);
  border-radius:6px;
  transition:transform .25s ease;
}

.forms-wrapper{ position:relative; }

form{
  display:flex;
  flex-direction:column;
  gap:14px;
}
form.hidden-form{
  display:none;
}

.field{
  position:relative;
}
.field input{
  width:100%;
  padding:11px 40px 11px 40px;
  background:var(--field);
  border:1px solid var(--border);
  border-radius:8px;
  color:var(--text);
  font-size:14px;
  outline:none;
  transition:border-color .15s;
}
.field input::placeholder{ color:var(--muted); }
.field input:focus{
  border-color:var(--accent);
}
.field .icon-left{
  position:absolute; left:12px; top:50%; transform:translateY(-50%);
  opacity:0.6; font-size:14px; pointer-events:none;
}
.field .icon-right{
  position:absolute; right:10px; top:50%; transform:translateY(-50%);
  background:none; border:none; color:var(--muted);
  cursor:pointer; font-size:14px; padding:4px;
}
.field .icon-right:hover{ color:var(--text); }

.field.error input{
  border-color:var(--danger);
}
.field.valid input{
  border-color:var(--success);
}

.error-msg{
  font-size:11.5px;
  color:var(--danger);
  min-height:14px;
  margin-top:-6px;
  margin-left:2px;
  display:block;
}

.strength-bar{
  height:4px;
  border-radius:4px;
  background:var(--border);
  overflow:hidden;
  margin-top:-6px;
}
.strength-bar > div{
  height:100%; width:0%;
  border-radius:4px;
  transition:width .2s, background .2s;
}
.strength-label{
  font-size:11px; color:var(--muted); margin-top:-6px;
}

.row-between{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:12.5px;
  color:var(--muted);
}
.remember{
  display:flex; align-items:center; gap:6px; cursor:pointer;
}
.remember input{ accent-color:var(--accent); cursor:pointer; }
.link{
  color:var(--accent);
  text-decoration:none;
  cursor:pointer;
}
.link:hover{ text-decoration:underline; }

button.submit{
  margin-top:2px;
  padding:11px;
  border:none;
  border-radius:8px;
  background:var(--accent);
  color:#fff;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  position:relative;
}
button.submit:hover{ opacity:0.92; }
button.submit:disabled{ opacity:0.6; cursor:not-allowed; }

.spinner{
  width:14px; height:14px;
  border:2px solid rgba(255,255,255,0.4);
  border-top-color:#fff;
  border-radius:50%;
  display:inline-block;
  vertical-align:middle;
  margin-right:8px;
  animation:spin .7s linear infinite;
  display:none;
}
.spinner.show{ display:inline-block; }
@keyframes spin{ to{ transform:rotate(360deg); } }

.divider{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--muted);
  font-size:12px;
  margin:4px 0;
}
.divider::before, .divider::after{
  content:'';
  flex:1;
  height:1px;
  background:var(--border);
}

.socials{
  display:flex;
  gap:10px;
}
.socials button{
  flex:1;
  padding:9px;
  border-radius:8px;
  border:1px solid var(--border);
  background:var(--field);
  color:var(--text);
  font-size:13px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
}
.socials button:hover{ background:var(--bg); }

.toast{
  position:fixed;
  top:20px; left:50%;
  transform:translateX(-50%) translateY(-10px);
  background:var(--card);
  border:1px solid var(--border);
  color:var(--text);
  padding:11px 18px;
  border-radius:8px;
  font-size:13.5px;
  display:flex;
  align-items:center;
  gap:10px;
  box-shadow:0 4px 16px rgba(15,23,42,0.16);
  opacity:0;
  pointer-events:none;
  transition:opacity .2s, transform .2s;
  z-index:50;
}
.toast.show{
  opacity:1;
  transform:translateX(-50%) translateY(0);
}
.toast .dot{
  width:8px; height:8px; border-radius:50%;
  background:var(--success);
}
.toast.error .dot{ background:var(--danger); }

.shake{ animation:shake .3s; }
@keyframes shake{
  10%,90%{ transform:translateX(-1px); }
  20%,80%{ transform:translateX(2px); }
  30%,50%,70%{ transform:translateX(-3px); }
  40%,60%{ transform:translateX(3px); }
}

.success-check{
  display:none;
  width:60px; height:60px;
  margin:6px auto 4px;
}
.success-check.show{ display:block; }
.success-check circle{
  stroke:var(--success);
  stroke-width:3;
  fill:none;
}
.success-check path{
  stroke:var(--success);
  stroke-width:3;
  fill:none;
  stroke-linecap:round;
  stroke-linejoin:round;
}

.success-text{
  text-align:center;
  display:none;
}
.success-text.show{ display:block; }