:root{
  --bg:            #050813;
  --bg-glow-1:     #1c3fae;
  --bg-glow-2:     #0aa4e0;
  --surface:       rgba(255,255,255,0.045);
  --surface-strong: rgba(255,255,255,0.08);
  --border:        rgba(255,255,255,0.12);
  --border-soft:   rgba(255,255,255,0.07);
  --text:          #eef3fb;
  --text-dim:      #93a2bd;
  --text-faint:    #5c6a87;
  --blue:          #3f7cf6;
  --blue-deep:     #2450c9;
  --lightblue:     #7fd8ff;
  --error:         #ff6b7f;
  --radius:        18px;
  --radius-sm:     10px;
  --font-display:  'Space Grotesk', sans-serif;
  --font-body:     'Inter', sans-serif;
  --font-mono:     'JetBrains Mono', monospace;
  --ease-tween:    cubic-bezier(.22, 1, .36, 1);
}
*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--bg); color:var(--text); font-family:var(--font-body);
  min-height:100vh; overflow-x:hidden; position:relative;
}

/* ---- ambient background glow ---- */
body::before, body::after{
  content:""; position:fixed; border-radius:50%; filter:blur(120px); z-index:-1; pointer-events:none;
}
body::before{
  width:640px; height:640px; top:-220px; left:-160px;
  background:radial-gradient(circle, var(--bg-glow-1), transparent 70%);
  opacity:.55;
}
body::after{
  width:560px; height:560px; bottom:-200px; right:-140px;
  background:radial-gradient(circle, var(--bg-glow-2), transparent 70%);
  opacity:.35;
}
.top-edge-glow{
  position:fixed; top:0; left:0; right:0; height:2px; z-index:60; pointer-events:none;
  background:linear-gradient(90deg, transparent, var(--lightblue), var(--blue), var(--lightblue), transparent);
  opacity:.7;
}

.wrap{ max-width:1080px; margin:0 auto; padding:0 24px; }

/* ================= NAV ================= */
nav{
  display:flex; align-items:center; justify-content:space-between;
  max-width:1080px; margin:20px auto 0; padding:14px 22px;
  border-radius:999px;
  background:var(--surface); border:1px solid var(--border);
  backdrop-filter:blur(22px) saturate(180%); -webkit-backdrop-filter:blur(22px) saturate(180%);
  box-shadow:0 10px 36px -16px rgba(63,124,246,.4), inset 0 1px 0 rgba(255,255,255,.08);
  position:sticky; top:16px; z-index:50;
}
.brand{ display:flex; align-items:center; gap:10px; text-decoration:none; color:inherit; }
.brand-mark{
  width:32px; height:32px; display:flex; align-items:center; justify-content:center;
  filter:drop-shadow(0 4px 10px rgba(63,124,246,.45));
}
.brand-mark img{ width:100%; height:100%; object-fit:contain; display:block; }
.brand-name{ font-family:var(--font-display); font-weight:600; font-size:18px; letter-spacing:.01em; }
.nav-links{ display:flex; align-items:center; gap:28px; }
.nav-links a{ color:var(--text-dim); text-decoration:none; font-size:14px; transition:color .25s var(--ease-tween); }
.nav-links a:hover{ color:var(--text); }

/* ================= LIQUID GLASS TWEEN BUTTONS ================= */
.btn{
  position:relative; display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--font-body); font-weight:600; font-size:14.5px; text-decoration:none;
  padding:13px 26px; border-radius:999px; border:1px solid var(--border);
  color:var(--text); cursor:pointer; overflow:hidden; isolation:isolate;
  background:var(--surface); backdrop-filter:blur(16px) saturate(160%); -webkit-backdrop-filter:blur(16px) saturate(160%);
  transition:transform .5s var(--ease-tween), padding .5s var(--ease-tween), box-shadow .5s var(--ease-tween), border-color .5s var(--ease-tween);
}
.btn::before{
  content:""; position:absolute; inset:-60% -20%; z-index:-1;
  background:linear-gradient(120deg, transparent 30%, rgba(255,255,255,.22) 48%, rgba(255,255,255,.05) 54%, transparent 70%);
  background-size:220% 220%; background-position:0% 50%;
  transition:background-position .7s var(--ease-tween);
}
.btn:hover{
  transform:scale(1.055) translateY(-2px);
  padding-left:32px; padding-right:32px;
  box-shadow:0 14px 34px -14px rgba(63,124,246,.55), inset 0 1px 0 rgba(255,255,255,.22);
}
.btn:hover::before{ background-position:100% 50%; }
.btn:active{ transform:scale(.98) translateY(0); transition:transform .15s var(--ease-tween); }
.btn:disabled{ opacity:.6; cursor:default; }
.btn:disabled:hover{ transform:none; padding-left:26px; padding-right:26px; box-shadow:none; }

.btn-primary{
  background:linear-gradient(135deg, var(--lightblue), var(--blue-deep));
  color:#03101f; border-color:transparent;
}
.btn-primary:hover{ box-shadow:0 16px 40px -14px rgba(127,216,255,.6), inset 0 1px 0 rgba(255,255,255,.4); }

.btn-ghost{ background:var(--surface); }

/* ================= HERO ================= */
.hero{ padding:70px 0 90px; }
.hero-grid{
  display:grid; grid-template-columns:1fr auto; align-items:center; gap:60px;
}
@media (max-width:860px){
  .hero-grid{ grid-template-columns:1fr; text-align:center; }
  .hero-preview{ justify-self:center; }
}
.hero-copy{ text-align:left; }
@media (max-width:860px){ .hero-copy{ text-align:center; } }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--font-mono); font-size:12px;
  letter-spacing:.06em; color:var(--lightblue); background:rgba(127,216,255,.08);
  border:1px solid rgba(127,216,255,.25); padding:6px 14px; border-radius:999px; margin-bottom:26px;
}
.eyebrow .dot{ width:6px; height:6px; border-radius:50%; background:var(--lightblue); box-shadow:0 0 10px var(--lightblue); }

.hero h1{
  font-family:var(--font-display); font-weight:700; letter-spacing:-.02em;
  font-size:clamp(38px, 5.4vw, 64px); line-height:1.06; margin-bottom:22px;
}
.hero h1 span{
  background:linear-gradient(135deg, var(--lightblue), var(--blue));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero-copy p{ color:var(--text-dim); font-size:17px; max-width:480px; margin:0 0 40px; line-height:1.6; }
@media (max-width:860px){ .hero-copy p{ margin:0 auto 40px; } }
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; }
@media (max-width:860px){ .hero-ctas{ justify-content:center; } }

/* ---- hero profile preview card ---- */
.hero-preview{ display:flex; justify-content:center; }
.preview-card{
  width:260px; padding:32px 26px; border-radius:var(--radius); text-align:center;
  background:var(--surface); border:1px solid var(--border);
  backdrop-filter:blur(20px) saturate(180%); -webkit-backdrop-filter:blur(20px) saturate(180%);
  box-shadow:0 24px 60px -24px rgba(63,124,246,.5), inset 0 1px 0 rgba(255,255,255,.08);
}
.preview-avatar{
  width:76px; height:76px; margin:0 auto 18px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-display); font-weight:700; font-size:28px; color:#03101f;
  background:linear-gradient(135deg, var(--lightblue), var(--blue-deep));
  box-shadow:0 10px 28px -10px rgba(63,124,246,.6);
}
.preview-name{ font-family:var(--font-display); font-weight:600; font-size:17px; margin-bottom:2px; }
.preview-handle{ font-family:var(--font-mono); font-size:12.5px; color:var(--lightblue); margin-bottom:14px; }
.preview-bio{ font-size:13px; color:var(--text-dim); margin-bottom:22px; }
.preview-links{ display:flex; justify-content:center; gap:10px; }
.preview-link{
  width:34px; height:34px; border-radius:10px; display:flex; align-items:center; justify-content:center;
  background:var(--surface-strong); border:1px solid var(--border-soft); font-size:14px;
}

/* ================= CLAIM USERNAME ================= */
.claim{ padding:20px 0 100px; text-align:center; }
.claim-box{
  max-width:560px; margin:0 auto; display:flex; align-items:center; gap:8px;
  padding:7px; border-radius:999px;
  background:var(--surface); border:1px solid var(--border);
  backdrop-filter:blur(20px) saturate(180%); -webkit-backdrop-filter:blur(20px) saturate(180%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .35s var(--ease-tween), box-shadow .35s var(--ease-tween);
}
.claim-box:focus-within{
  border-color:rgba(127,216,255,.55);
  box-shadow:0 0 0 4px rgba(127,216,255,.12), inset 0 1px 0 rgba(255,255,255,.06);
}
.claim-box.is-error{ border-color:rgba(255,107,127,.6); box-shadow:0 0 0 4px rgba(255,107,127,.12); }
.claim-box.shake{ animation:shakeInput .4s var(--ease-tween); }
.claim-input-group{
  flex:1 1 auto; min-width:0; display:flex; align-items:center; gap:0; padding-left:16px;
}
.claim-prefix{
  font-family:var(--font-body); font-weight:500; font-size:15px; color:var(--text-dim); white-space:nowrap;
}
.claim-input{
  flex:1; min-width:0; background:transparent; border:none; outline:none;
  font-family:var(--font-body); font-size:15px; color:var(--text); padding:10px 4px 10px 0;
}
.claim-input::placeholder{ color:var(--text-faint); }
.claim-btn{ flex:0 0 auto; white-space:nowrap; }
.claim-hint{
  margin-top:16px; font-size:13px; color:var(--text-faint); min-height:18px;
  transition:color .3s var(--ease-tween);
}
.claim-hint.is-error{ color:var(--error); }
.claim-hint.is-success{ color:var(--lightblue); }
@keyframes shakeInput{
  0%,100%{ transform:translateX(0); }
  25%{ transform:translateX(-6px); }
  75%{ transform:translateX(6px); }
}

/* ================= FEATURES ================= */
.section-head{ text-align:center; margin-bottom:52px; }
.section-head .eyebrow{ margin-bottom:16px; }
.section-head h2{ font-family:var(--font-display); font-size:clamp(26px,4vw,36px); font-weight:600; margin-bottom:10px; }
.section-head p{ color:var(--text-dim); font-size:15px; }

.features{ padding:60px 0 100px; }
.feature-grid{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:18px;
}
@media (max-width:820px){ .feature-grid{ grid-template-columns:repeat(2, 1fr); } }
@media (max-width:560px){ .feature-grid{ grid-template-columns:1fr; } }

.feature-card{
  position:relative; padding:28px 24px; border-radius:var(--radius); isolation:isolate; overflow:hidden;
  background:var(--surface); backdrop-filter:blur(18px) saturate(150%); -webkit-backdrop-filter:blur(18px) saturate(150%);
  border:1px solid var(--border-soft);
  transition:transform .5s var(--ease-tween), border-color .5s var(--ease-tween), box-shadow .5s var(--ease-tween);
}
.feature-card::before{
  content:""; position:absolute; inset:-50%; z-index:-1;
  background:radial-gradient(circle at 30% 20%, rgba(127,216,255,.16), transparent 60%);
  opacity:0; transition:opacity .6s var(--ease-tween);
}
.feature-card:hover{
  transform:translateY(-6px) scale(1.02);
  border-color:rgba(127,216,255,.3);
  box-shadow:0 24px 50px -24px rgba(63,124,246,.45), inset 0 1px 0 rgba(255,255,255,.12);
}
.feature-card:hover::before{ opacity:1; }

.feature-icon{
  width:44px; height:44px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  font-size:20px; margin-bottom:18px;
  background:linear-gradient(135deg, rgba(127,216,255,.18), rgba(63,124,246,.18));
  border:1px solid rgba(127,216,255,.25);
}
.feature-card h3{ font-family:var(--font-display); font-size:16.5px; font-weight:600; margin-bottom:8px; }
.feature-card p{ color:var(--text-dim); font-size:13.5px; line-height:1.55; }

/* ================= STATUS STRIP ================= */
.status-strip{
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:16px;
  padding:22px 28px; border-radius:var(--radius); margin-bottom:90px;
  background:var(--surface); border:1px solid var(--border-soft);
  backdrop-filter:blur(16px) saturate(150%); -webkit-backdrop-filter:blur(16px) saturate(150%);
}
.status-strip .left{ display:flex; align-items:center; gap:12px; }
.status-strip .ver{
  font-family:var(--font-mono); font-size:12.5px; color:var(--lightblue);
  background:rgba(127,216,255,.1); border:1px solid rgba(127,216,255,.25);
  padding:4px 10px; border-radius:999px;
}
.status-strip .msg{ font-size:13.5px; color:var(--text-dim); }

/* ================= FOOTER ================= */
footer{ padding:50px 0 60px; border-top:1px solid var(--border-soft); text-align:center; }
footer p{ color:var(--text-faint); font-size:13px; }
footer .brand{ justify-content:center; margin-bottom:14px; }

/* ================= 404 PAGE ================= */
.notfound{
  min-height:calc(100vh - 250px); display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center; padding:60px 24px;
}
.notfound-code{
  font-family:var(--font-display); font-weight:700; letter-spacing:-.03em;
  font-size:clamp(96px, 20vw, 190px); line-height:1; margin-bottom:6px;
  background:linear-gradient(135deg, var(--lightblue), var(--blue));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.notfound-mark{ width:64px; height:64px; margin:0 auto 20px; filter:drop-shadow(0 6px 16px rgba(63,124,246,.5)); opacity:.9; }
.notfound-mark img{ width:100%; height:100%; object-fit:contain; }
.notfound h1{ font-family:var(--font-display); font-size:clamp(22px,3vw,28px); font-weight:600; margin-bottom:12px; }
.notfound p{ color:var(--text-dim); font-size:15px; max-width:420px; margin:0 auto 34px; line-height:1.6; }
.notfound-ctas{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

/* ================= SIGNUP PAGE ================= */
.signup{
  min-height:calc(100vh - 250px); display:flex; align-items:center; justify-content:center;
  padding:60px 24px;
}
.signup-card{
  width:100%; max-width:420px; text-align:center; padding:44px 34px;
  border-radius:var(--radius); background:var(--surface); border:1px solid var(--border-soft);
  backdrop-filter:blur(18px) saturate(150%); -webkit-backdrop-filter:blur(18px) saturate(150%);
}
.signup-mark{ width:52px; height:52px; margin:0 auto 22px; filter:drop-shadow(0 6px 16px rgba(63,124,246,.5)); }
.signup-mark img{ width:100%; height:100%; object-fit:contain; }
.signup-card h1{
  font-family:var(--font-display); font-size:clamp(20px,3vw,24px); font-weight:600; margin-bottom:10px;
}
.signup-card h1 span{ color:var(--lightblue); }
.signup-card > p{ color:var(--text-dim); font-size:14.5px; margin-bottom:28px; line-height:1.6; }

.btn-google{
  width:100%; background:#fff; color:#1f1f1f; border-color:transparent;
  font-size:14.5px; padding:13px 20px;
}
.btn-google:hover{ box-shadow:0 16px 40px -14px rgba(255,255,255,.35), inset 0 1px 0 rgba(255,255,255,.7); }
.btn-google:disabled{ opacity:.75; }

.signup-fineprint{ margin-top:20px; font-size:12px; color:var(--text-faint); line-height:1.6; }

/* ================= LOADING OVERLAY ================= */
.loading-overlay{
  position:fixed; inset:0; z-index:9999;
  background:var(--bg);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:22px;
  transition:opacity .5s var(--ease-tween), visibility 0s linear 0s;
  animation:cssFailsafeHide 0s linear 5s forwards;
}
@keyframes cssFailsafeHide{
  to{ opacity:0; visibility:hidden; pointer-events:none; }
}
.loading-overlay.is-hidden{
  opacity:0; visibility:hidden; pointer-events:none;
  transition:opacity .5s var(--ease-tween), visibility 0s linear .5s;
}
.loading-overlay::before, .loading-overlay::after{
  content:""; position:absolute; border-radius:50%; filter:blur(120px); z-index:-1; pointer-events:none;
}
.loading-overlay::before{
  width:640px; height:640px; top:-220px; left:-160px;
  background:radial-gradient(circle, var(--bg-glow-1), transparent 70%); opacity:.55;
}
.loading-overlay::after{
  width:560px; height:560px; bottom:-200px; right:-140px;
  background:radial-gradient(circle, var(--bg-glow-2), transparent 70%); opacity:.35;
}
.loading-logo{
  width:56px; height:56px; object-fit:contain;
  animation:pulseLogo 1.3s ease-in-out infinite;
  filter:drop-shadow(0 0 18px rgba(63,124,246,.55));
}
@keyframes pulseLogo{
  0%,100%{ transform:scale(1); opacity:1; }
  50%{ transform:scale(1.08); opacity:.72; }
}
.loading-bar{
  width:160px; height:3px; border-radius:999px;
  background:rgba(255,255,255,.08); overflow:hidden;
}
.loading-bar-fill{
  height:100%; width:36%; border-radius:999px;
  background:linear-gradient(90deg, var(--lightblue), var(--blue));
  animation:loadingSlide 1.05s ease-in-out infinite;
}
@keyframes loadingSlide{
  0%{ transform:translateX(-120%); }
  100%{ transform:translateX(380%); }
}

@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; }
}