:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --green: #16a34a;
  --red: #dc2626;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  max-width: 560px;
  margin: 0 auto;
  padding: 16px;
  min-height: 100vh;
}

header { text-align: center; margin-bottom: 16px; }
header h1 { font-size: 1.5rem; }
.subtitle { color: var(--muted); font-size: 0.9rem; }

/* Tabs */
.tabs {
  display: flex;
  gap: 6px;
  background: var(--card);
  padding: 6px;
  border-radius: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
  margin-bottom: 16px;
}
.tab {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 0;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--muted);
}
.tab.active { background: var(--primary); color: #fff; }

.panel { display: none; }
.panel.active { display: block; }

/* Forms */
form { background: var(--card); padding: 20px; border-radius: 14px; box-shadow: 0 1px 3px rgba(0,0,0,.08); }

label {
  display: block;
  margin: 14px 0 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}
.step-label { margin-top: 0; }

input, select, textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  background: #f8fafc;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: -1px;
  background: #fff;
}

/* Category buttons */
.category-buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.cat-btn {
  flex: 1 1 30%;
  min-width: 120px;
  border: 2px solid var(--border);
  background: #fff;
  padding: 14px 10px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all .15s;
}
.cat-btn:hover { border-color: var(--primary); }
.cat-btn.selected {
  border-color: var(--primary);
  background: #eff6ff;
  color: var(--primary);
}

/* Buttons */
.btn {
  width: 100%;
  border: none;
  padding: 14px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 18px;
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.secondary { background: var(--border); color: var(--text); margin-top: 8px; }

.hidden { display: none; }

/* Summary cards */
.summary-cards { display: flex; gap: 10px; }
.card {
  flex: 1;
  background: var(--card);
  border-radius: 14px;
  padding: 16px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
.card-label { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
.card-value { font-size: 1.15rem; font-weight: 800; margin-top: 6px; }
.card.income .card-value { color: var(--green); }
.card.expense .card-value { color: var(--red); }
.card.balance .card-value { color: var(--primary); }

.summary-controls { margin: 16px 0; background: var(--card); padding: 16px; border-radius: 14px; }
.summary-controls label { margin-top: 0; }

/* Records */
.records-tabs { display: flex; gap: 6px; margin-bottom: 10px; }
.rec-tab {
  border: 1px solid var(--border);
  background: #fff;
  padding: 8px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
}
.rec-tab.active { background: var(--text); color: #fff; border-color: var(--text); }

.records-list { max-height: 55vh; overflow-y: auto; }
.record {
  background: var(--card);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 8px;
  border-left: 4px solid var(--green);
  box-shadow: 0 1px 2px rgba(0,0,0,.05);
}
.record.expense { border-left-color: var(--red); }
.record .rec-top { display: flex; justify-content: space-between; align-items: center; }
.record .rec-title { font-weight: 700; }
.record .rec-amount { font-weight: 800; }
.record.income .rec-amount { color: var(--green); }
.record.expense .rec-amount { color: var(--red); }
.record .rec-meta { color: var(--muted); font-size: 0.8rem; margin-top: 4px; }
.record .rec-note { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }

.empty {
  text-align: center;
  color: var(--muted);
  padding: 30px;
  background: var(--card);
  border-radius: 14px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #0f172a;
  color: #fff;
  padding: 12px 20px;
  border-radius: 30px;
  font-weight: 600;
  opacity: 0;
  transition: all .3s;
  box-shadow: 0 4px 12px rgba(0,0,0,.3);
  max-width: 90%;
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }