*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0f0a;
  --bg2: #0f1a0f;
  --card: #111c11;
  --border: #1e3a1e;
  --border2: #2a4a2a;
  --green: #22c55e;
  --green2: #16a34a;
  --green3: #4ade80;
  --glow: rgba(34,197,94,0.15);
  --glow2: rgba(34,197,94,0.25);
  --text: #e8f5e8;
  --text2: #a0b8a0;
  --dim: #5a7a5a;
  --red: #ef4444;
  --r: 12px;
  --r2: 8px;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* NAV */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand, .green {
  background: linear-gradient(135deg, var(--green), var(--green3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.brand { font-size: 1.2rem; font-weight: 700; }

/* LAYOUT */
.container { max-width: 1100px; margin: 0 auto; padding: 28px 20px; }
.view { display: none; }
.view.active { display: block; }
.two-col { display: grid; grid-template-columns: 360px 1fr; gap: 16px; align-items: start; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

/* HERO */
.hero { text-align: center; padding: 40px 0 32px; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 700; line-height: 1.2; margin-bottom: 12px; }
.hero p { color: var(--text2); }

/* CARDS */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px;
  margin-bottom: 16px;
}
.card:hover { border-color: var(--border2); transition: border-color 0.2s; }
.card h2, .card h3 { margin-bottom: 12px; font-weight: 600; }
.card h2 { font-size: 1rem; }
.card h3 { font-size: 0.95rem; }
.center-card { max-width: 520px; margin: 0 auto 16px; }

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--r2);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  white-space: nowrap;
  font-family: inherit;
}
.btn.primary { background: var(--green); color: #000; font-weight: 600; }
.btn.primary:hover { background: var(--green3); box-shadow: 0 0 16px var(--glow2); transform: translateY(-1px); }
.btn.outline { background: transparent; color: var(--green); border: 1px solid var(--green); }
.btn.outline:hover { background: var(--glow); }
.btn.ghost { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn.ghost:hover { color: var(--text); border-color: var(--border2); }
.btn.danger { background: rgba(239,68,68,0.1); color: var(--red); border: 1px solid transparent; padding: 4px 10px; font-size: 0.8rem; }
.btn.danger:hover { border-color: var(--red); }
.btn.full { width: 100%; justify-content: center; }

/* INPUTS */
input, select {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  padding: 9px 12px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, select:focus { border-color: var(--green); box-shadow: 0 0 0 3px var(--glow); }
input::placeholder { color: var(--dim); }
select option { background: var(--bg2); }
label { display: block; font-size: 0.82rem; color: var(--text2); margin-bottom: 5px; }

/* UTILS */
.row { display: flex; gap: 8px; align-items: center; }
.row input, .row select { flex: 1; }
.mb12 { margin-bottom: 12px; }
.mt8 { margin-top: 8px; }
.dim { color: var(--dim); font-size: 0.82rem; }
.right { text-align: right; }
.right span { color: var(--green); font-weight: 600; }

/* TABS */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 5px;
  margin-bottom: 20px;
  overflow-x: auto;
}
.tab {
  flex: 1;
  padding: 9px 14px;
  border-radius: var(--r2);
  border: none;
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s;
  white-space: nowrap;
  font-family: inherit;
}
.tab.active { background: var(--glow2); color: var(--green); border: 1px solid var(--border2); }
.tab:hover:not(.active) { color: var(--text); background: var(--bg2); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* GROUP HEADER */
.group-header { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.group-header h2 { font-size: 1.4rem; margin-bottom: 0; }

.chip, .badge, .tog {
  border-radius: var(--r2);
  border: 1px solid var(--border2);
  background: var(--glow);
  font-size: 0.82rem;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; min-height: 30px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border-radius: 20px;
  padding: 3px 10px;
  color: var(--green3);
}
.chip .av {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--green2);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem; font-weight: 700; color: #fff;
}
.toggle { display: flex; gap: 6px; }
.tog { flex: 1; padding: 7px; background: var(--bg2); color: var(--text2); cursor: pointer; transition: all 0.2s; font-family: inherit; }
.tog.active { border-color: var(--green); color: var(--green); font-weight: 600; }
.badge { border-radius: 20px; padding: 4px 10px; font-size: 0.75rem; color: var(--green3); white-space: nowrap; min-width: 85px; text-align: center; }

/* EXPENSE ITEMS */
.exp-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 12px 14px;
  margin-bottom: 8px;
  transition: border-color 0.2s;
}
.exp-item:hover { border-color: var(--border2); }
.exp-top { display: flex; justify-content: space-between; margin-bottom: 4px; }
.exp-name { font-weight: 500; font-size: 0.92rem; }
.exp-amt { font-weight: 700; color: var(--green); }
.exp-meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; justify-content: space-between; }
.tag { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1px 7px; font-size: 0.72rem; color: var(--text2); }

/* BALANCE / DEBT ITEMS */
.bal-item, .debt-item, .settle-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  margin-bottom: 8px;
  gap: 10px;
  flex-wrap: wrap;
}
.pos { color: var(--green); font-weight: 700; }
.neg { color: var(--red); font-weight: 700; }
.zero { color: var(--dim); font-weight: 700; }

/* CATEGORY BARS */
.bar-item { margin-bottom: 12px; }
.bar-label { display: flex; justify-content: space-between; font-size: 0.82rem; color: var(--text2); margin-bottom: 4px; }
.bar-track { background: var(--bg2); border-radius: 4px; height: 7px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--green2), var(--green)); border-radius: 4px; transition: width 0.5s ease; }

/* TOP SPENDERS */
.spender { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--border); }
.spender:last-child { border-bottom: none; }
.rank { width: 26px; height: 26px; border-radius: 50%; background: var(--glow); border: 1px solid var(--border2); display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 700; color: var(--green); flex-shrink: 0; }

/* INSIGHT BOX */
.insight-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 16px;
  min-height: 100px;
  font-size: 0.88rem;
  color: var(--text2);
  white-space: pre-wrap;
  line-height: 1.7;
}
.insight-box.loaded { color: var(--text); }

/* RECENT GROUPS */
.recent-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  cursor: pointer;
  margin-bottom: 6px;
  transition: all 0.2s;
}
.recent-item:hover { border-color: var(--green); background: var(--glow); }

/* EMPTY STATE */
.empty { text-align: center; padding: 28px; color: var(--dim); font-size: 0.88rem; }
.empty span { display: block; font-size: 2rem; margin-bottom: 6px; }

/* TOAST */
.toast {
  position: fixed;
  bottom: 20px; right: 20px;
  background: var(--card);
  border: 1px solid var(--border2);
  border-radius: var(--r2);
  padding: 10px 18px;
  font-size: 0.88rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  transform: translateY(60px);
  opacity: 0;
  transition: all 0.3s;
  z-index: 999;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: var(--green); color: var(--green3); }
.toast.error { border-color: var(--red); color: var(--red); }


@media (max-width: 560px) {
  .container { padding: 14px 12px; }
  .navbar { padding: 12px 14px; }
  .tab { padding: 7px 10px; font-size: 0.78rem; }
}