/* ---------- tokens ---------- */
:root{
  --bg-void:#0B0D10;
  --bg-panel:#14171B;
  --bg-panel-2:#1B1F24;
  --bg-input:#101317;
  --border:#262B31;
  --border-soft:#1E2328;
  --text-hi:#EDEFF1;
  --text-lo:#8D949C;
  --text-faint:#565D65;

  --gold:#E3A857;
  --gold-dim:#4A3A22;
  --teal:#4FB8AC;
  --teal-dim:#1F3A37;
  --coral:#E2705F;
  --coral-dim:#3D2723;

  --radius:14px;
  --radius-sm:8px;
  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}

body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(circle at top right, rgba(227,168,87,0.12), transparent 35%),
    radial-gradient(circle at bottom left, rgba(79,184,172,0.10), transparent 35%),
    var(--bg-void);

  color:var(--text-hi);
  font-family:var(--font-body);
  position:relative;
  overflow-x:hidden;
}

:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
  border-radius:4px;
}

/* ---------- ambient skyline backdrop ---------- */
.skyline-bg{
  position:fixed;
  left:0; right:0; bottom:0;
  height:34vh;
  min-height:220px;
  z-index:0;
  pointer-events:none;
  opacity:0.5;
  mask-image:linear-gradient(to bottom, transparent 0%, black 40%);
  -webkit-mask-image:linear-gradient(to bottom, transparent 0%, black 40%);
}
.skyline-bg svg{ width:100%; height:100%; display:block; }
.skyline-bg rect{
  fill:var(--bg-panel);
  animation:flicker 6s ease-in-out infinite;
}
.skyline-bg rect:nth-child(3n){ animation-delay:-1.3s; fill:#181C21; }
.skyline-bg rect:nth-child(5n){ animation-delay:-3.1s; }
.skyline-bg rect:nth-child(7n){ animation-delay:-4.4s; fill:#15181C; }
@keyframes flicker{
  0%, 100%{ opacity:0.9; }
  50%{ opacity:1; }
}

/* ---------- layout shell ---------- */
.app{
  position:relative;
  z-index:1;
  max-width:1180px;
  margin:0 auto;
  padding:56px 28px 40px;
}

/* ---------- hero ---------- */
.hero{ margin-bottom:40px; max-width:720px; }
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.14em;
  color:var(--gold);
  margin-bottom:14px;
}

.hero h1{
    font-family: "Segoe UI", sans-serif;
    font-weight: 700;
    font-size: clamp(48px, 6vw, 68px);
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin: 0 0 16px;

    background: linear-gradient(90deg, #FFFFFF, #E3A857);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero h1 span{ color:var(--text-lo); }
.lede{
  font-size:16px;
  line-height:1.6;
  color:var(--text-lo);
  margin:0 0 20px;
  max-width:56ch;
}

.conn-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--bg-panel);
  border:1px solid var(--border);
  color:var(--text-lo);
  font-family:var(--font-mono);
  font-size:12px;
  padding:8px 14px;
  border-radius:999px;
  cursor:pointer;
  transition:border-color .2s ease, color .2s ease;
}
.conn-toggle:hover{ border-color:var(--text-faint); color:var(--text-hi); }
.dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--text-faint);
  box-shadow:0 0 0 0 rgba(226,112,95,0);
  transition:background .3s ease;
}
.dot.ok{ background:var(--teal); box-shadow:0 0 8px var(--teal); }
.dot.bad{ background:var(--coral); box-shadow:0 0 8px var(--coral); }
.dot.checking{ background:var(--gold); animation:pulse 1s ease-in-out infinite; }
@keyframes pulse{ 50%{ opacity:0.35; } }

.conn-panel{
  margin-top:12px;
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:14px 16px;
  max-width:420px;
  opacity:0;
  transform:translateY(-10px);
  transition:
      opacity .25s ease,
      transform .25s ease;

  animation:dropIn .18s ease;
}

.conn-panel.open{
    opacity:1;
    transform:translateY(0);
}

.conn-panel label{
  display:block;
  font-size:11px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--text-faint);
  margin-bottom:8px;
}
.conn-row{ display:flex; gap:8px; }
.conn-row input{
  flex:1;
  background:var(--bg-input);
  border:1px solid var(--border);
  color:var(--text-hi);
  font-family:var(--font-mono);
  font-size:13px;
  padding:9px 10px;
  border-radius:6px;
}
.conn-row button{
  background:var(--bg-panel-2);
  border:1px solid var(--border);
  color:var(--text-hi);
  font-family:var(--font-body);
  font-size:13px;
  font-weight:500;
  padding:9px 14px;
  border-radius:6px;
  cursor:pointer;
  transition:background .2s ease;
}
.conn-row button:hover{ background:#242A31; }
.conn-hint{ margin:10px 0 0; font-size:12px; color:var(--text-faint); }
@keyframes dropIn{
  from{ opacity:0; transform:translateY(-6px); }
  to{ opacity:1; transform:translateY(0); }
}

/* ---------- grid ---------- */
.grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:22px;
  align-items:start;
}
@media (max-width:880px){
  .grid{ grid-template-columns:1fr; }
}

.panel{
  background: rgba(20, 23, 27, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);

  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);

  padding: 26px;

  box-shadow:
      0 8px 30px rgba(0,0,0,0.35),
      inset 0 1px 0 rgba(255,255,255,0.05);

  transition:
    transform .3s ease,
    border-color .3s ease,
    box-shadow .3s ease;
}

.panel:hover{
    transform: translateY(-5px);

    border:1px solid rgba(227,168,87,0.45);

    box-shadow:
        0 18px 40px rgba(0,0,0,.45),
        0 0 25px rgba(227,168,87,.18),
        inset 0 1px 0 rgba(255,255,255,.06);
}

.panel-title{
  font-family:var(--font-display);
  font-size:15px;
  font-weight:600;
  letter-spacing:0.08em;
  text-transform:uppercase;

  color:var(--text-hi);

  margin:0 0 22px;
  padding-bottom:14px;

  border-bottom:1px solid var(--border-soft);

  position:relative;
}


/* small golden accent line */
.panel-title::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;

  width:42px;
  height:2px;

  background:var(--gold);
  border-radius:10px;
}

/* ---------- form ---------- */
.spec-group{
  padding:18px 0 22px;
  border-bottom:1px dashed var(--border-soft);
}
.spec-group:last-of-type{ border-bottom:none; padding-bottom:8px; }

.spec-row{ margin-bottom:16px; }
.spec-row:last-child{ margin-bottom:0; }
.two-col{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
@media (max-width:520px){ .two-col{ grid-template-columns:1fr; } }

.field label{
  display:flex;
  align-items:center;
  gap:8px;

  font-family:var(--font-body);
  font-size:12.5px;
  font-weight:500;

  letter-spacing:.02em;
  color:var(--text-lo);

  margin-bottom:9px;

  transition:
      color .25s ease;
}


.field:hover label{
  color:var(--text-hi);
}

.field .num{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--text-faint);
  background:var(--bg-input);
  border:1px solid var(--border);
  border-radius:4px;
  padding:1px 5px;
}

input, select{
    width:100%;
    background:rgba(16,19,23,0.9);
    border:1px solid rgba(255,255,255,0.08);
    color:var(--text-hi);

    font-family:var(--font-body);
    font-size:15px;

    padding:13px 14px;
    border-radius:10px;

    transition:
    border-color .25s ease,
    background .25s ease,
    box-shadow .25s ease,
    transform .25s ease;
    appearance:none;
}
input.mono{ font-family:var(--font-mono); font-size:13px; }
input::placeholder{ color:var(--text-faint); }
input:hover,
select:hover{
    border-color:rgba(227,168,87,.45);
    transform:translateY(-1px);
}

input:focus,
select:focus{
    border-color:#E3A857;
    background:#15191E;
    box-shadow:0 0 0 4px rgba(227,168,87,.12);
    outline:none;
}

select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238D949C'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:32px;
}

.prefix-input{
  display:flex;
  align-items:center;
  background:var(--bg-input);
  border:1px solid var(--border);
  border-radius:8px;
  overflow:hidden;
}
.prefix-input:focus-within{ border-color:var(--gold); }
.prefix-input span{
  padding:0 0 0 12px;
  color:var(--text-faint);
  font-family:var(--font-mono);
}
.prefix-input input{ border:none; background:transparent; }
.prefix-input input:focus{ background:transparent; }

.pin-btn{
  margin-top:2px;
  background:none;
  border:1px dashed var(--border);
  color:var(--text-lo);
  font-family:var(--font-body);
  font-size:12.5px;
  padding:8px 12px;
  border-radius:8px;
  cursor:pointer;
  transition:border-color .15s ease, color .15s ease;
}
.pin-btn:hover{ border-color:var(--gold); color:var(--gold); }
.pin-btn.pin-flash{ border-color:var(--gold); color:var(--gold); background:var(--gold-dim); }

.predict-btn{
    width:100%;
    margin-top:22px;
    position:relative;
    overflow:hidden;

    background:linear-gradient(135deg,#E3A857,#F4C26D);
    color:#1A1305;
    border:none;

    font-family:"Segoe UI",sans-serif;
    font-weight:700;
    font-size:16px;
    letter-spacing:.5px;

    padding:16px 20px;
    border-radius:12px;
    cursor:pointer;

    display:flex;
    align-items:center;
    justify-content:center;
    gap:10px;

    transition:
    transform .3s ease,
    box-shadow .3s ease,
    filter .3s ease;
}

.predict-btn::before{
    content:"";
    position:absolute;

    top:0;
    left:-120%;

    width:80%;
    height:100%;

    background:linear-gradient(
        120deg,
        transparent,
        rgba(255,255,255,.35),
        transparent
    );

    transform:skewX(-20deg);
    transition:left .6s ease;
}


.predict-btn:hover::before{
    left:130%;
}

.predict-btn:hover{
    transform:translateY(-3px) scale(1.02);

    box-shadow:
        0 12px 30px rgba(227,168,87,.45),
        0 0 25px rgba(227,168,87,.25);

    filter:brightness(1.05);
}
.predict-btn:active{ transform:translateY(0); }
.predict-btn:disabled{ opacity:0.7; cursor:progress; transform:none; }

.btn-spinner{
  width:15px; height:15px;
  border-radius:50%;
  border:2px solid rgba(26,19,5,0.25);
  border-top-color:#1A1305;
  display:none;
}
.predict-btn.is-loading .btn-spinner{ display:inline-block; animation:spin .7s linear infinite; }
.predict-btn.is-loading .btn-label{ opacity:0.85; }
@keyframes spin{ to{ transform:rotate(360deg); } }

.form-error{
  margin:12px 2px 0;
  color:var(--coral);
  font-size:13px;
  background:var(--coral-dim);
  border:1px solid #5A3129;
  padding:10px 12px;
  border-radius:8px;
}

/* ---------- result panel ---------- */
.result-panel{ 
  min-height:520px;
  display:flex;
  flex-direction:column;

  position:relative;
  overflow:hidden;
}

.result-panel::before{
  content:"";
  position:absolute;

  top:-50%;
  right:-30%;

  width:300px;
  height:300px;

  background:radial-gradient(
      circle,
      rgba(227,168,87,.12),
      transparent 70%
  );

  pointer-events:none;
}

.result-stage{
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
}

.idle-state, .loading-state{
  text-align:center;
  color:var(--text-faint);
}

.idle-pin{ font-size:44px; margin-bottom:14px; filter:grayscale(0.4) opacity(0.7); }
.idle-state p, .loading-state p{ font-size:13.5px; line-height:1.6; margin:0; }

.radar{
  width:70px;
  height:70px;

  margin:0 auto 18px;

  position:relative;

  display:flex;
  align-items:center;
  justify-content:center;
}

.radar span{
  position:absolute; inset:0;
  border:2px solid var(--gold);
  border-radius:50%;
  opacity:0;
  animation:radarPing 1.8s ease-out infinite;
}

.radar::after{
  content:"";

  width:10px;
  height:10px;

  border-radius:50%;

  background:var(--gold);

  box-shadow:
      0 0 10px var(--gold),
      0 0 20px rgba(227,168,87,.5);

  animation:pulseDot 1.2s ease-in-out infinite;
}


@keyframes pulseDot{
  50%{
    transform:scale(1.4);
    opacity:.6;
  }
}

.radar span:nth-child(2){ animation-delay:0.5s; }
.radar span:nth-child(3){ animation-delay:1s; }
@keyframes radarPing{
  0%{ transform:scale(0.3); opacity:0.9; }
  100%{ transform:scale(1.3); opacity:0; }
}

@keyframes resultReveal{

  from{
    opacity:0;
    transform:
        translateY(18px)
        scale(.98);

    filter:blur(6px);
  }


  to{
    opacity:1;
    transform:
        translateY(0)
        scale(1);

    filter:blur(0);
  }

}

.result-state{
  width:100%;

  animation:
      resultReveal .6s cubic-bezier(.2,.8,.2,1);
}

.result-headline{
  text-align:center;
  margin-bottom:32px;
}

.result-kicker{
  display:block;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--text-faint);
  margin-bottom:8px;
}

.result-label{
  font-family:var(--font-display);
  font-size:clamp(24px, 3.4vw, 34px);
  font-weight:600;
  background:linear-gradient(90deg, var(--text-hi), var(--gold));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* ---------- building probability chart ---------- */
.buildings{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:18px;
  align-items:end;
  padding:0 6px;
}

.building{
  display:flex;
  flex-direction:column;
  align-items:center;
}

.building-tower{
  position:relative;
  width:100%;
  height:220px;
  background:var(--bg-input);
  border:1px solid var(--border);
  border-radius:8px 8px 3px 3px;
  overflow:hidden;
  display:flex;
  align-items:flex-end;
}

.building .fill{
  width:100%;
  height:0%;
  position:relative;
  transition:
      height 1s cubic-bezier(.2,.8,.2,1),
      filter .4s ease;
  filter:brightness(.9);
}

.building .fill::after{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:40px;
  background:linear-gradient(
      to bottom,
      rgba(255,255,255,.35),
      transparent
  );
  opacity:.35;
}

.building[data-key="entire"] .fill{ background:linear-gradient(180deg, #F0C27E, var(--gold)); }
.building[data-key="private"] .fill{ background:linear-gradient(180deg, #7FD6CB, var(--teal)); }
.building[data-key="shared"] .fill{ background:linear-gradient(180deg, #EF9385, var(--coral)); }

.building .floors{
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(
    to top,
    rgba(11,13,16,0.55) 0px,
    rgba(11,13,16,0.55) 1px,
    transparent 1px,
    transparent 16px
  );
  pointer-events:none;
}

.building-meta{
  margin-top:12px;
  text-align:center;
}
.building-pct{
  display:block;
  font-family:var(--font-mono);
  font-size:17px;
  font-weight:600;
}
.building[data-key="entire"] .building-pct{ color:var(--gold); }
.building[data-key="private"] .building-pct{ color:var(--teal); }
.building[data-key="shared"] .building-pct{ color:var(--coral); }
.building-name{
  display:block;
  font-size:11.5px;
  color:var(--text-lo);
  margin-top:2px;
}

.building.is-winner .building-tower{
  border-color:currentColor;
  box-shadow:
      0 0 0 1px currentColor,
      0 12px 30px -10px currentColor;
  animation:
      winnerPulse 2s ease-in-out infinite;
}

@keyframes winnerPulse{
  50%{
    filter:brightness(1.15);
  }
}

.building[data-key="entire"].is-winner{ color:var(--gold); }
.building[data-key="private"].is-winner{ color:var(--teal); }
.building[data-key="shared"].is-winner{ color:var(--coral); }
.building.is-winner .building-name{ color:var(--text-hi); }

/* ---------- footer ---------- */
.foot{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--border-soft);
  text-align:center;
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--text-faint);
  letter-spacing:.02em;
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
  html{ scroll-behavior:auto; }
}

@media (max-width:600px){
  .app{
    padding:36px 16px 30px;
  }
  .hero h1{
    font-size:42px;
  }
  .panel{
    padding:20px;
  }
  .predict-btn{
    font-size:15px;
    padding:14px 16px;
  }
  .buildings{
    gap:10px;
  }
  .building-tower{
    height:170px;
  }
}