/* /login — same design language as /challenge and /account: Plus Jakarta Sans,
   the Baloo 2 wordmark, white cards on cream, hairline outlines, soft shadows,
   gradient buttons and the blue→purple hero card. Light theme only. */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue:#2257D6; --blue-l:#3F86FF; --blue-d:#1B47B8; --blue-top:#3B74F0;
  --red:#F0453F; --red-top:#FF6157; --gold:#FFCB3A; --gold-d:#E5A81E; --teal:#15B5A0; --purple:#7C4DFF;
  --ink:#16121F; --text:#16121F; --muted:#6F6886; --bg:#FFF4E3; --card:#FFFFFF;
  --line:rgba(22,18,31,.09); --field:#F4F6FA; --field-line:#DCE1EA; --chip:#EEF2FF; --chip-text:#2257D6;
  --ok-bg:#E3F6F2; --ok-text:#0B6B5D; --err-bg:#FFECEB; --err-text:#A01E17; --info-bg:#E7EEFF;
  --shadow:0 18px 40px -12px rgba(58,42,18,.14),0 1px 3px rgba(22,18,31,.05);
  --shadow-sm:0 7px 16px -6px rgba(58,42,18,.08),0 1px 2px rgba(22,18,31,.04);
  color-scheme:light;
}
html{-webkit-text-size-adjust:100%}
body{font-family:'Plus Jakarta Sans',system-ui,-apple-system,sans-serif;font-weight:500;font-size:15px;line-height:1.5;
  background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(60% 45% at 15% 0%,rgba(63,134,255,.18),transparent 70%),
             radial-gradient(50% 40% at 95% 100%,rgba(255,203,58,.22),transparent 70%)}
h1,h2,h3{letter-spacing:-.025em;line-height:1.12}
a{color:var(--blue)}
[hidden]{display:none!important}
svg{flex:none}

/* ── Top bar ── */
.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 80%,transparent);
  backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}
.topbar-in{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.brand img{width:36px;height:36px;border-radius:11px;box-shadow:var(--shadow-sm)}
.brand span{font-family:'Baloo 2',sans-serif;font-weight:800;font-size:23px;letter-spacing:-.02em;line-height:1}
.brand b{color:var(--blue);font-weight:800} .brand i{color:var(--red);font-style:normal}
.lang{display:flex;padding:3px;border-radius:999px;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow-sm);flex:none}
.lang button{font:700 12.5px 'Plus Jakarta Sans',sans-serif;padding:7px 12px;border:0;border-radius:999px;background:transparent;color:var(--muted);cursor:pointer;transition:background .2s,color .2s}
.lang button[aria-pressed="true"]{background:linear-gradient(180deg,var(--blue-top),var(--blue));color:#fff}

/* ── Layout ── */
.auth-main{max-width:1080px;margin:0 auto;padding:44px 20px 40px;display:grid;grid-template-columns:1.05fr .95fr;gap:18px 48px;align-items:center;align-content:center;min-height:calc(100vh - 62px)}
.auth-col{width:100%;max-width:440px;justify-self:end}
@media (max-width:900px){
  .auth-main{grid-template-columns:1fr;gap:28px;padding:24px 16px 32px;min-height:0}
  .auth-col{justify-self:center;order:-1}
  .auth-hero{max-width:440px;justify-self:center;width:100%}
}

/* ── Hero (left) ── */
.eyebrow{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.hero-title{font-size:clamp(32px,4.6vw,50px);font-weight:800;margin:12px 0 0}
.hero-title .grad{background:linear-gradient(90deg,var(--blue),var(--purple) 70%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{font-size:17px;color:var(--muted);margin:14px 0 24px;max-width:480px}
.hero-card{position:relative;border-radius:26px;padding:22px 22px 18px;color:#fff;overflow:hidden;
  background:linear-gradient(135deg,#1B47B8,#4A3FD6 55%,var(--purple));box-shadow:0 30px 60px -22px rgba(74,63,214,.55);border:1px solid rgba(255,255,255,.14)}
.hero-card::before{content:'';position:absolute;right:-70px;top:-90px;width:250px;height:250px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 70%)}
.hero-card .mascot{position:absolute;right:16px;top:12px;width:66px;pointer-events:none}
.hero-card .tag{position:relative;display:inline-flex;align-items:center;gap:8px;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);padding:6px 11px;border-radius:999px}
.dot{width:8px;height:8px;border-radius:50%;background:#3DF5B5;box-shadow:0 0 0 0 rgba(61,245,181,.6);animation:pulse 1.8s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(61,245,181,0)}100%{box-shadow:0 0 0 0 rgba(61,245,181,0)}}
.feats{position:relative;list-style:none;margin:16px 0 0;display:flex;flex-direction:column;gap:8px}
.feats li{display:flex;align-items:center;gap:12px;font-size:14.5px;font-weight:600;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:10px 12px}
.feats li:first-child{margin-right:70px}
.fic{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:rgba(255,255,255,.18);flex:none}
.fic svg{width:17px;height:17px}
.trust{display:flex;gap:18px;flex-wrap:wrap;margin-top:20px;font-size:13.5px;color:var(--muted);font-weight:600}
.trust>span{display:inline-flex;align-items:center;gap:6px}
.trust svg{width:16px;height:16px;color:var(--teal)}
@media (max-width:900px){.hero-title{font-size:30px}.hero-lead{font-size:15.5px;margin-bottom:18px}}

/* ── Login card (right) ── */
.card{background:var(--card);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);padding:30px 28px}
@media (max-width:420px){.card{padding:24px 18px;border-radius:22px}}
.card-head{text-align:center;margin-bottom:20px}
.card-logo{width:56px;height:56px;border-radius:17px;box-shadow:var(--shadow-sm);margin-bottom:12px}
.card-ico{width:52px;height:52px;border-radius:16px;display:inline-grid;place-items:center;background:var(--chip);color:var(--chip-text);margin-bottom:12px}
.card-ico svg{width:24px;height:24px}
.title{font-size:28px;font-weight:800}
.sub{color:var(--muted);font-size:14.5px;margin-top:6px}
.social{display:flex;justify-content:center;min-height:44px;margin-bottom:10px}
.social-btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:48px;border-radius:999px;
  font:700 15px 'Plus Jakarta Sans',sans-serif;cursor:pointer;border:0}
.social-btn.apple{background:var(--ink);color:#fff;margin-bottom:4px}
.divider{display:flex;align-items:center;gap:12px;margin:16px 0;color:var(--muted);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--field-line)}
.lbl{display:block;font-size:13px;font-weight:700;color:var(--text);margin-bottom:7px}
.lbl-row{display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.lbl-row .linkbtn{padding:0 0 7px;font-size:13px}
.field{position:relative;display:flex;align-items:center;margin-bottom:14px}
.field .fi{position:absolute;left:14px;width:19px;height:19px;color:var(--muted);pointer-events:none}
.field input[type]{padding-left:44px;padding-right:70px}
.reveal{position:absolute;right:8px;background:none;border:0;font:700 12.5px 'Plus Jakarta Sans',sans-serif;color:var(--blue);cursor:pointer;padding:8px 10px;border-radius:10px}
.reveal:hover{background:var(--chip)}
input[type=email],input[type=password],input[type=text]{width:100%;font:500 16px 'Plus Jakarta Sans',sans-serif;padding:14px 15px;
  border:1px solid var(--field-line);border-radius:14px;background:var(--field);color:var(--text);transition:border-color .15s,box-shadow .15s,background .15s}
input::placeholder{color:#9A94AE}
input:focus{outline:none;border-color:var(--blue-l);background:#fff;box-shadow:0 0 0 4px rgba(63,134,255,.16)}
input.otp{font:800 28px 'Plus Jakarta Sans',sans-serif;font-variant-numeric:tabular-nums;text-align:center;letter-spacing:.32em;margin-bottom:14px;padding:14px}
.hint{font-size:12.5px;color:var(--muted);margin:-4px 0 14px}
.card-foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);text-align:center;font-size:14px;color:var(--muted)}
.card-foot a{font-weight:700;text-decoration:none}
.nowrap{white-space:nowrap}
.auth-foot{grid-column:2;width:100%;max-width:440px;justify-self:end}
@media (max-width:900px){.auth-foot{grid-column:1;justify-self:center;margin-top:0}}
.help-line{text-align:center;font-size:13.5px;color:var(--muted)}
.help-line a{font-weight:700;text-decoration:none}
.legal{text-align:center;font-size:12.5px;color:var(--muted);margin-top:10px}
.legal a{color:var(--muted);text-decoration:none}
.legal a:hover,.help-line a:hover,.card-foot a:hover{text-decoration:underline}

/* ── Buttons, messages ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:52px;padding:14px 20px;margin-top:4px;
  font:800 16px/1.2 'Plus Jakarta Sans',sans-serif;letter-spacing:-.01em;text-decoration:none;cursor:pointer;color:#fff;
  border-radius:16px;border:1px solid rgba(255,255,255,.14);background:linear-gradient(180deg,var(--blue-top),var(--blue));
  box-shadow:0 12px 24px -8px rgba(34,87,214,.5);transition:transform .12s,filter .12s}
.btn:hover{filter:brightness(1.05)}
.btn:active{transform:scale(.99)}
.btn.red{background:linear-gradient(180deg,var(--red-top),var(--red));box-shadow:0 12px 24px -8px rgba(240,69,63,.45)}
.btn.light{background:var(--card);color:var(--blue);border-color:var(--field-line);box-shadow:var(--shadow-sm)}
.btn[disabled]{opacity:.6;cursor:not-allowed}
.linkbtn{background:none;border:0;color:var(--blue);font:700 13.5px 'Plus Jakarta Sans',sans-serif;cursor:pointer;padding:4px}
.linkbtn:hover{text-decoration:underline;text-underline-offset:3px}
.linkbtn.center{display:block;margin:14px auto 0}
.msg{display:none;border-radius:14px;padding:11px 14px;font-size:14px;font-weight:600;margin-bottom:14px;line-height:1.45}
.msg.err{display:block;background:var(--err-bg);color:var(--err-text)}
.msg.ok{display:block;background:var(--ok-bg);color:var(--ok-text)}
.msg.info{display:block;background:var(--info-bg);color:var(--blue-d)}
.spin{display:inline-block;width:16px;height:16px;border:2.5px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:s .7s linear infinite}
.btn.light .spin{border-color:var(--field-line);border-top-color:var(--blue)}
@keyframes s{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.dot,.spin{animation:none}}

/* ── Touch: comfortable tap targets on phones ── */
.lang button{min-height:36px}
.reveal{min-height:36px}
.lbl-row .linkbtn{padding:11px 0 11px 12px;margin:-11px 0 -4px}
.linkbtn.center{padding:11px 16px;margin-top:8px}
.social-btn{min-height:44px}
/* Small phones (≤380px): keep logo, wordmark and the language switch on one row */
@media (max-width:380px){
  .topbar-in{padding:10px 14px;gap:8px}
  .brand{gap:7px}.brand img{width:30px;height:30px;border-radius:9px}.brand span{font-size:19px}
  .lang button{padding:7px 9px;font-size:12px}
}
.brand{min-height:40px}