/* ============================================================
   auth.css v4
   ============================================================ */
.auth-page{min-height:100vh;display:flex;position:relative;overflow:hidden}

.auth-left{
  flex:1;display:flex;flex-direction:column;justify-content:center;
  padding:72px;position:relative;border-right:1px solid var(--border);
  background:radial-gradient(ellipse at top left,rgba(108,99,255,.12) 0%,transparent 55%),
             radial-gradient(ellipse at bottom right,rgba(6,182,212,.06) 0%,transparent 55%);
}
.auth-orb{position:absolute;border-radius:50%;filter:blur(120px);pointer-events:none}
.auth-orb-1{width:450px;height:450px;background:#5b4ee0;opacity:.15;top:-150px;left:-150px}
.auth-orb-2{width:300px;height:300px;background:#0891b2;opacity:.1;bottom:-80px;right:-60px}

.auth-brand{font-family:var(--font-head);font-size:22px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:56px;letter-spacing:-.03em;position:relative;z-index:1}
.auth-brand-box{width:30px;height:30px;border-radius:9px;background:var(--p-grad);display:flex;align-items:center;justify-content:center;font-size:14px;box-shadow:var(--s-p)}

.auth-copy{position:relative;z-index:1;margin-bottom:36px}
.auth-copy h2{font-size:clamp(28px,3.5vw,42px);font-weight:700;letter-spacing:-.03em;line-height:1.1;margin-bottom:14px}
.auth-copy h2 em{font-style:normal;background:var(--p-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.auth-copy p{font-size:15px;color:var(--t2);font-weight:300;max-width:340px;line-height:1.7}

.auth-perks{display:flex;flex-direction:column;gap:12px;position:relative;z-index:1}
.auth-perk{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--t2)}
.perk-check{width:20px;height:20px;border-radius:50%;background:var(--green-dim);border:1px solid var(--green-border);display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--green);flex-shrink:0}

/* Floating card */
.auth-preview{
  position:absolute;bottom:52px;right:48px;z-index:1;
  background:var(--bg-card);border:1px solid var(--border-2);
  border-radius:var(--r3);padding:14px 18px;min-width:210px;
  box-shadow:var(--s3);animation:float 4s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
.prev-title{font-size:10px;font-weight:600;color:var(--t3);text-transform:uppercase;letter-spacing:.07em;margin-bottom:10px}
.prev-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.prev-row:last-of-type{margin-bottom:0}
.prev-icon{width:28px;height:28px;border-radius:7px;background:var(--bg-3);display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0}
.prev-info .pn{font-size:12px;font-weight:500}
.prev-info .pm{font-size:11px;color:var(--t3);margin-top:1px}
.prev-tick{margin-left:auto;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;flex-shrink:0}
.prev-tick.done{background:var(--green-dim);border:1px solid var(--green-border);color:var(--green)}
.prev-tick.pend{background:var(--bg-3);border:1px solid var(--border)}
.prev-sep{height:1px;background:var(--border);margin:8px 0}
.prev-streak{display:flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--amber)}

/* Right */
.auth-right{width:460px;display:flex;align-items:center;justify-content:center;padding:44px 52px;background:var(--bg-2);position:relative}
.auth-form-wrap{width:100%;max-width:340px}
.back-link{display:inline-flex;align-items:center;gap:5px;font-size:13px;color:var(--t3);cursor:pointer;margin-bottom:36px;transition:color .15s}
.back-link:hover{color:var(--t1)}
.auth-header{margin-bottom:24px}
.auth-title{font-size:24px;font-weight:700;letter-spacing:-.02em;margin-bottom:5px}
.auth-sub{font-size:14px;color:var(--t2)}

.auth-tabs{display:flex;background:var(--bg-3);border:1px solid var(--border);border-radius:var(--r2);padding:3px;margin-bottom:24px}
.auth-tab{flex:1;padding:8px 10px;border-radius:10px;font-size:14px;font-weight:500;text-align:center;cursor:pointer;border:none;background:transparent;color:var(--t2);transition:all .18s var(--e)}
.auth-tab.active{background:var(--bg-card);color:var(--t1);box-shadow:var(--s1)}

.auth-error{background:var(--red-dim);border:1px solid var(--red-border);border-radius:var(--r2);padding:9px 13px;font-size:13px;color:var(--red);margin-bottom:14px;display:none}

.auth-fields{display:flex;flex-direction:column;gap:13px;margin-bottom:18px}
.input-wrap{position:relative}
.input-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--t3);font-size:14px;pointer-events:none;z-index:1}
.input-wrap input{
  padding:11px 13px 11px 36px;background:var(--bg-3);
  border:1px solid var(--border);border-radius:var(--r2);
  color:var(--t1);font-size:14px;width:100%;outline:none;
  transition:border-color .15s,box-shadow .15s;
}
.input-wrap input:focus{border-color:var(--p);box-shadow:0 0 0 3px var(--p-dim)}
.input-wrap input::placeholder{color:var(--t3)}

.auth-btn{
  width:100%;padding:12px;border-radius:var(--r-full);
  background:var(--p-grad);color:#fff;
  font-family:var(--font-head);font-size:15px;font-weight:600;
  border:none;cursor:pointer;
  transition:all .2s var(--e);box-shadow:var(--s-p);
  display:flex;align-items:center;justify-content:center;gap:7px;
}
.auth-btn:hover{transform:translateY(-1px);box-shadow:0 12px 32px var(--p-glow)}
.auth-btn:disabled{opacity:.6;pointer-events:none}

.or-sep{display:flex;align-items:center;gap:10px;margin:16px 0;color:var(--t3);font-size:12px}
.or-sep::before,.or-sep::after{content:'';flex:1;height:1px;background:var(--border)}

.demo-btn{
  width:100%;padding:10px;border-radius:var(--r-full);
  background:transparent;border:1px solid var(--border-2);
  color:var(--t2);font-size:14px;cursor:pointer;
  transition:all .18s var(--e);display:flex;align-items:center;justify-content:center;gap:7px;
}
.demo-btn:hover{border-color:var(--p);color:var(--p-light);background:var(--p-dim)}

.auth-footer{text-align:center;margin-top:16px;font-size:12px;color:var(--t3)}
.auth-footer a{color:var(--p);cursor:pointer}
.auth-footer a:hover{text-decoration:underline}

@media(max-width:820px){.auth-left{display:none}.auth-right{width:100%;padding:44px 28px}}

/* ── LIGHT MODE ──────────────────────────────────────────── */
[data-theme="light"] .auth-left  { background:linear-gradient(135deg,rgba(91,82,232,.06) 0%,rgba(6,182,212,.03) 100%); border-color:var(--border); }
[data-theme="light"] .auth-right { background:var(--bg-2); }
[data-theme="light"] .auth-preview { background:var(--bg-card); border-color:var(--border-2); }
[data-theme="light"] .auth-tabs  { background:var(--bg-3); }
[data-theme="light"] .auth-tab.active { background:var(--bg-card); }
[data-theme="light"] .input-wrap input { background:var(--bg-3); }
[data-theme="light"] .auth-orb-1 { background:#a5b4fc; opacity:.2; }
[data-theme="light"] .auth-orb-2 { background:#6ee7b7; opacity:.15; }

/* ── MOBILE ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .auth-left   { display: none; }
  .auth-right  { width: 100%; padding: 32px 20px; min-height: 100vh; }
  .auth-form-wrap { max-width: 100%; }
}