:root{
  --bg: #0b0f14;
  --bg-soft: #0e141b;
  --card: #121922;
  --card-2: #0f1620;
  --text: #e6edf3;
  --muted: #a3afbf;
  --border: #1f2a37;
  --accent-1: #7c3aed;   /* violet */
  --accent-2: #06b6d4;   /* cyan   */
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 20px 50px rgba(0,0,0,.45);
  --radius: 14px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif;
  color:var(--text);
  background:
    radial-gradient(1000px 500px at -20% -20%, rgba(124,58,237,.18), transparent 60%),
    radial-gradient(800px 400px at 120% -10%, rgba(6,182,212,.14), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg-soft));
  padding: 24px;
}

a{ color:#7dd3fc; text-decoration:none }
a:hover{ text-decoration:underline }

.nav{
  max-width: 920px;
  margin: 0 auto 18px;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.01));
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}
.brand{
  font-weight: 800;
  letter-spacing:.2px;
  display:flex; align-items:center; gap:10px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  text-decoration: none;
}
.nav .links{ display:flex; gap:12px; align-items:center }
.chip{
  display:inline-flex; align-items:center; gap:8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  font-weight: 600;
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease;
  box-shadow: 0 4px 18px rgba(0,0,0,.2) inset;
}
.chip:hover{ transform: translateY(-1px); border-color:#2b394a }
.chip.active{
  border: 0px solid transparent;
  background:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03)),
    linear-gradient(135deg, var(--accent-1), var(--accent-2));
  background-clip: padding-box, border-box;
  box-shadow: 0 0 0 1px rgba(124,58,237,.25), 0 0 35px rgba(124,58,237,.15);
}

.container{
  max-width: 920px; margin: 0 auto;
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

h1,h2,h3,h4{ margin:0 0 10px }
h2{ font-weight:800; letter-spacing:.2px }
.subtle{ color:var(--muted) }

/* Stats */
.balance-wrap{
  display:grid; gap:14px; align-items:center; justify-items:center;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
}
#balance{
  font-size: clamp(34px, 5vw, 44px);
  font-weight: 900;
  letter-spacing:.3px;
  margin-top: 6px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 24px rgba(124,58,237,.25);
}

.inc-exp-container{
  display:grid; grid-template-columns: repeat(2, 1fr); gap:14px; margin-top: 14px;
}
.stat{
  padding:16px; border-radius: calc(var(--radius) - 4px);
  background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.02));
  border: 1px solid var(--border);
}
.stat h4{ color: var(--muted); font-weight:600; margin-bottom:6px }
.money{
  font-size: 20px; font-weight:800; letter-spacing:.2px;
  display:flex; align-items:center; gap:10px;
}
.money.plus{ color: var(--success) }
.money.minus{ color: var(--danger) }

/* History list */
.section-title{ margin-top: 18px; display:flex; align-items:center; justify-content:space-between }
.list{ list-style:none; padding:0; margin:12px 0 0 }
.list li{
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  border-right: 4px solid;
  border-radius: calc(var(--radius));
  padding: 12px 12px;
  margin: 10px 0;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  animation: slideIn .28s ease;
}
.list li.plus{ border-right-color: rgba(34,197,94,.9) }
.list li.minus{ border-right-color: rgba(239,68,68,.9) }

.left{ display:flex; flex-direction:column; gap:8px }
.title{ font-weight:700 }
.cat-wrap{ display:flex; align-items:center; gap:10px; flex-wrap:wrap }
.category-badge{
  padding:4px 10px; border-radius:999px; font-size:12px;
  background: linear-gradient(135deg, rgba(124,58,237,.18), rgba(6,182,212,.18));
  border: 1px solid rgba(124,58,237,.35);
}
.category-inline, select#category{
  appearance:none; -webkit-appearance:none; -moz-appearance:none;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease, transform .08s ease;
}
.category-inline:focus, select#category:focus{
  border-color: #2b394a;
  box-shadow: 0 0 0 3px rgba(124,58,237,.18);
}

.right{ display:flex; align-items:center; gap:10px }
.amount{ min-width: 110px; text-align:right; font-variant-numeric: tabular-nums; font-weight:700 }
.delete-btn{
  width:34px; height:34px; border-radius:10px;
  display:grid; place-items:center;
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.01));
  border: 1px solid var(--border);
  color: var(--danger);
  cursor:pointer;
  transition: transform .08s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}
.delete-btn:hover{
  transform: translateY(-1px);
  border-color: rgba(239,68,68,.45);
  box-shadow: 0 0 24px rgba(239,68,68,.18);
  background: rgba(239,68,68,.08);
}

/* Form */
.form-control{ margin: 12px 0 }
label{ color: var(--muted); font-weight:600; font-size:14px }
input[type="text"], input[type="number"]{
  width:100%; padding:12px 12px; margin-top: 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease, transform .08s ease;
}
input[type="text"]:focus, input[type="number"]:focus{
  border-color:#2b394a; box-shadow: 0 0 0 3px rgba(6,182,212,.18);
}

.radio-group{
  margin: 14px 0 10px; display:flex; gap:12px; align-items:center;
}
/* Segmented control look */
.segmented{
  display:flex; background: var(--card-2); padding:4px; border-radius: 999px;
  border: 1px solid var(--border);
  gap:6px;
}
.segmented input{ position:absolute; opacity:0; pointer-events:none }
.segmented label{
  user-select:none; cursor:pointer; padding:8px 14px; border-radius: 999px; font-weight:700;
  color: var(--muted); transition: background .2s ease, color .2s ease, transform .08s ease;
}
.segmented input:checked + label{
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: white;
  text-shadow: 0 0 20px rgba(124,58,237,.35);
}

.btn{
  margin-top: 6px;
  border:none; cursor:pointer; font-weight:800; letter-spacing:.2px;
  padding: 12px 14px; width:100%;
  border-radius: 12px;
  color: white;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 12px 30px rgba(124,58,237,.25);
  transition: transform .08s ease, box-shadow .2s ease, filter .2s ease;
}
.btn:hover{ filter: brightness(1.05) }
.btn:active{ transform: translateY(1px) }

.hint{ color: var(--muted); display:block; margin-top:8px; font-size:12px }

/* Categories page */
.category-list{ list-style:none; padding:0; margin: 10px 0 0 }
.category-list li{
  display:flex; justify-content:space-between; align-items:center; gap:10px;
  padding: 12px 14px; margin: 8px 0;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.02));
  animation: slideIn .28s ease;
}
.badge-light{
  color:#cbd5e1; background: #0b1220; border: 1px solid #1e293b;
  border-radius: 999px; padding: 2px 8px; font-size: 12px;
}

/* Animations */
@keyframes slideIn{
  from{ opacity:0; transform: translateY(6px) }
  to{ opacity:1; transform: translateY(0) }
}

/* Responsive */
@media (max-width:720px){
  .inc-exp-container{ grid-template-columns: 1fr }
  .amount{ min-width: 90px }
  .nav{ gap:8px }
  .brand{ font-size: 18px }
}