:root{
  --ink:#06171c;
  --ink-2:#082229;
  --ink-3:#0b2c34;
  --line:rgba(146,207,212,.14);
  --line-strong:rgba(146,207,212,.26);
  --text:#eaf4f4;
  --muted:#8fb0b5;
  --teal:#2dd4bf;
  --teal-deep:#0f766e;
  --orange:#f97316;
  --amber:#fbbf24;
  --danger:#f87171;
  --radius:18px;
  --shadow:0 30px 80px rgba(0,0,0,.45);
  --font:"Bahnschrift","DIN Alternate","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body.auth-body{
  font-family:var(--font);
  background:var(--ink);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
button,input{font-family:inherit}
a{color:inherit;text-decoration:none}
.auth-shell{
  min-height:100vh;
  display:grid;
  grid-template-columns:minmax(520px,46%) 1fr;
  background:
    radial-gradient(1200px 700px at 12% -10%,rgba(13,148,136,.16),transparent 60%),
    radial-gradient(900px 600px at 90% 110%,rgba(249,115,22,.1),transparent 60%),
    #041216;
}
.auth-panel{
  position:relative;
  display:flex;
  flex-direction:column;
  padding:38px 64px 26px;
  border-right:1px solid rgba(146,207,212,.1);
  background:
    linear-gradient(180deg,rgba(5,24,29,.9),rgba(4,18,22,.96)),
    repeating-linear-gradient(90deg,transparent 0 79px,rgba(143,219,224,.035) 79px 80px);
  overflow-y:auto;
}
.auth-panel::before{
  content:"";
  position:absolute;
  top:0;left:0;bottom:0;width:3px;
  background:linear-gradient(180deg,transparent,rgba(45,212,191,.65) 30%,rgba(249,115,22,.8) 72%,transparent);
  opacity:.7;
}
.auth-brand{display:flex;align-items:center;gap:14px}
.brand-mark{
  width:46px;height:46px;border-radius:13px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,#0f4c53,#072a31);
  border:1px solid rgba(143,219,224,.28);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 12px 30px rgba(0,0,0,.35);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:-6px;border-radius:17px;
  border:1px solid rgba(45,212,191,.16);
}
.brand-copy{display:flex;flex-direction:column;line-height:1.1}
.brand-copy b{font-size:15px;letter-spacing:.14em;font-weight:600}
.brand-copy span{font-size:10px;letter-spacing:.3em;color:var(--muted);margin-top:5px}
.auth-form-wrap{
  width:min(400px,100%);
  margin:auto;
  padding:56px 0 36px;
  animation:rise .8s cubic-bezier(.2,.7,.2,1) both;
}
.auth-kicker{
  display:flex;align-items:center;gap:10px;
  font-size:10px;letter-spacing:.32em;color:#78a7ac;text-transform:uppercase;
  margin-bottom:22px;
}
.auth-kicker::before{content:"";width:26px;height:1px;background:var(--orange)}
.auth-form-wrap h1{
  font-size:clamp(30px,2.5vw,40px);
  line-height:1.28;
  letter-spacing:-.01em;
  font-weight:600;
}
.auth-form-wrap h1 .dot{color:var(--orange)}
.auth-sub{
  margin-top:14px;
  color:var(--muted);
  font-size:13px;
  letter-spacing:.08em;
  line-height:1.8;
}
.auth-form{margin-top:38px;display:flex;flex-direction:column;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:11px;letter-spacing:.16em;color:#9ab9bd}
.input-shell{
  position:relative;display:flex;align-items:center;
  border:1px solid rgba(146,207,212,.18);
  background:rgba(9,35,41,.56);
  border-radius:12px;
  transition:border-color .2s,box-shadow .2s,background .2s;
}
.input-shell:focus-within{
  border-color:rgba(45,212,191,.6);
  background:rgba(10,42,49,.78);
  box-shadow:0 0 0 4px rgba(45,212,191,.08),0 12px 30px rgba(0,0,0,.25);
}
.input-shell .icon{position:absolute;left:15px;width:17px;height:17px;color:#6f969b;pointer-events:none}
.input-shell input{
  width:100%;
  height:48px;
  border:0;outline:0;background:transparent;color:var(--text);
  padding:0 46px 0 44px;
  font-size:14px;letter-spacing:.03em;
}
.input-shell input::placeholder{color:#52777c}
.toggle-eye{
  position:absolute;right:8px;width:32px;height:32px;border:0;background:transparent;color:#6f969b;
  display:grid;place-items:center;cursor:pointer;border-radius:8px;
}
.toggle-eye:hover{color:var(--teal);background:rgba(45,212,191,.08)}
.toggle-eye svg{width:16px;height:16px}
.form-row{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}
.check{display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none}
.check input{width:14px;height:14px;accent-color:#14b8a6}
.check span{color:#93b2b6;letter-spacing:.05em}
.link-quiet{color:#9ec5c9;border-bottom:1px dashed rgba(158,197,201,.35);padding-bottom:2px}
.link-quiet:hover{color:var(--teal);border-color:var(--teal)}
.btn-auth{
  margin-top:6px;
  height:50px;border:0;border-radius:12px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;gap:10px;
  background:linear-gradient(120deg,#f97316,#fb923c 55%,#fbbf24);
  color:#1a1206;font-weight:700;font-size:14px;letter-spacing:.14em;
  box-shadow:0 16px 34px rgba(249,115,22,.24);
  transition:transform .2s,box-shadow .2s,filter .2s;
}
.btn-auth:hover{transform:translateY(-2px);box-shadow:0 20px 44px rgba(249,115,22,.32);filter:brightness(1.03)}
.btn-auth:active{transform:translateY(0)}
.btn-auth svg{width:18px;height:18px}
.btn-auth[disabled]{opacity:.6;cursor:wait;transform:none}
.auth-alt{margin-top:26px;font-size:12px;color:var(--muted);text-align:center;letter-spacing:.06em}
.auth-alt a{color:var(--teal);margin-left:6px;font-weight:600}
.auth-message{
  display:none;margin-top:14px;padding:12px 14px;border-radius:10px;
  font-size:12px;line-height:1.6;letter-spacing:.03em;
  border:1px solid rgba(248,113,113,.3);background:rgba(248,113,113,.08);color:#fecaca;
}
.auth-message.show{display:block;animation:shake .4s}
.auth-message.ok{border-color:rgba(45,212,191,.3);background:rgba(45,212,191,.08);color:#99f6e4}
.auth-foot{
  display:flex;align-items:center;justify-content:space-between;
  font-size:10px;color:#557b80;letter-spacing:.14em;
  padding-top:20px;border-top:1px solid rgba(146,207,212,.08);
}
.auth-foot .ver{padding:4px 8px;border:1px solid rgba(146,207,212,.14);border-radius:6px;color:#7fa4a8}

/* ---------- right visual ---------- */
.auth-visual{
  position:relative;overflow:hidden;min-height:100vh;
  display:flex;align-items:flex-end;
  padding:52px 58px;
}
.auth-visual>img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transform:scale(1.03);
  animation:drift 26s ease-in-out infinite alternate;
}
.auth-visual::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(4,18,22,.55),transparent 34%),
    linear-gradient(0deg,rgba(3,14,17,.94),rgba(3,14,17,.15) 55%,rgba(3,14,17,.5));
}
.visual-top{
  position:absolute;top:44px;right:52px;z-index:2;
  display:flex;align-items:center;gap:10px;
  font-size:10px;letter-spacing:.24em;color:#a9c8cc;
  padding:9px 14px;border:1px solid rgba(146,207,212,.18);border-radius:99px;
  background:rgba(5,27,32,.55);backdrop-filter:blur(12px);
}
.live-dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(45,212,191,.12);animation:pulse 1.8s infinite}
.visual-top b{color:var(--teal);font-weight:600;letter-spacing:.14em}
.hud{
  position:absolute;z-index:2;
  padding:16px 18px;border-radius:14px;
  background:rgba(6,30,36,.62);
  border:1px solid rgba(146,207,212,.16);
  backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
  animation:float 7s ease-in-out infinite;
}
.hud-a{top:19%;left:12%;animation-delay:-1s}
.hud-b{top:35%;right:9%;animation-delay:-3s}
.hud-c{top:56%;left:22%;animation-delay:-5s;padding:12px 16px}
.hud-label{font-size:9px;letter-spacing:.24em;color:#7ba3a8;text-transform:uppercase}
.hud-value{display:flex;align-items:flex-end;gap:6px;margin-top:8px}
.hud-value b{font-size:29px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.hud-value small{font-size:10px;color:#8fb0b5;padding-bottom:5px}
.hud-bar{width:132px;height:3px;border-radius:2px;background:rgba(146,207,212,.14);margin-top:12px;overflow:hidden}
.hud-bar i{display:block;height:100%;width:78%;background:linear-gradient(90deg,var(--teal),#5eead4);border-radius:2px}
.hud-spark{display:flex;align-items:flex-end;gap:3px;height:26px;margin-top:10px}
.hud-spark i{width:4px;border-radius:2px;background:rgba(45,212,191,.6)}
.hud-c .hud-value b{font-size:20px}
.hud-c .dot-list{display:flex;gap:8px;margin-top:10px}
.hud-c .dot-list span{font-size:9px;letter-spacing:.1em;color:#8fb0b5;border:1px solid rgba(146,207,212,.16);padding:3px 7px;border-radius:99px}
.visual-caption{position:relative;z-index:2;width:min(560px,90%);animation:rise 1s .15s cubic-bezier(.2,.7,.2,1) both}
.visual-index{font-size:10px;letter-spacing:.34em;color:#7ba3a8;display:flex;align-items:center;gap:12px}
.visual-index::before{content:"";width:42px;height:1px;background:var(--orange)}
.visual-caption h2{
  margin-top:18px;font-size:clamp(30px,3.4vw,46px);line-height:1.24;font-weight:500;letter-spacing:-.02em;
  text-shadow:0 6px 40px rgba(0,0,0,.45);
}
.visual-caption h2 em{font-style:normal;color:var(--teal)}
.visual-stats{display:flex;gap:38px;margin-top:34px;padding-top:22px;border-top:1px solid rgba(146,207,212,.16)}
.visual-stats div{display:flex;flex-direction:column;gap:6px}
.visual-stats b{font-size:19px;font-weight:500;font-variant-numeric:tabular-nums}
.visual-stats span{font-size:9px;letter-spacing:.2em;color:#7ba3a8}

/* register */
.auth-shell.register{grid-template-columns:minmax(560px,50%) 1fr}
.register .auth-form-wrap{width:min(470px,100%);padding:34px 0 24px}
.register .auth-form-wrap h1{font-size:clamp(26px,2.2vw,34px)}
.register .auth-form{display:grid;grid-template-columns:1fr 1fr;gap:15px 14px;margin-top:28px}
.register .field.full{grid-column:1/-1}
.register .form-row.full,.register .btn-auth,.register .auth-alt,.register .auth-message{grid-column:1/-1}
.register .input-shell input{height:46px;font-size:13px}
.register .btn-auth{height:48px}
.register .auth-check{grid-column:1/-1;display:flex;align-items:flex-start;gap:9px;font-size:11px;line-height:1.7;color:#8fb0b5}
.back-link{display:inline-flex;align-items:center;gap:7px;font-size:11px;letter-spacing:.1em;color:#8fb0b5;margin-bottom:20px}
.back-link:hover{color:var(--teal)}
.back-link svg{width:14px;height:14px}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(45,212,191,.12)}50%{box-shadow:0 0 0 8px rgba(45,212,191,.02)}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes drift{from{transform:scale(1.03) translate3d(0,0,0)}to{transform:scale(1.08) translate3d(-10px,-14px,0)}}
@keyframes rise{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}

@media (max-width:1180px){
  .auth-shell{grid-template-columns:minmax(480px,52%) 1fr}
  .hud-a{left:8%}.hud-b{right:5%}.hud-c{left:14%}
  .visual-stats{gap:24px}
}
@media (max-width:940px){
  body.auth-body{overflow:auto}
  .auth-shell,.auth-shell.register{grid-template-columns:1fr}
  .auth-visual{display:none}
  .auth-panel{padding:28px 24px 20px;min-height:100vh;border-right:0}
  .auth-form-wrap{padding:44px 0 30px}
  .register .auth-form{grid-template-columns:1fr}
}
@media (max-width:520px){
  .auth-form-wrap h1{font-size:27px}
  .auth-panel{padding:22px 18px 16px}
  .auth-foot{flex-direction:column;gap:10px;align-items:flex-start}
}