:root {
  color-scheme: dark;
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --bg-glow: #1e293b;
  --panel: #1e293b;
  --panel-2: #273449;
  --border: #334155;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --green: #34d399;
  --red: #f87171;
  --yellow: #fbbf24;
  --on-accent: #0f172a;
  --nav-bg: rgba(15, 23, 42, 0.9);
  --chart-grid: rgba(148, 163, 184, 0.2);
  --chart-tick: #94a3b8;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f1f5f9;
  --bg-soft: #e2e8f0;
  --bg-glow: #dbeafe;
  --panel: #ffffff;
  --panel-2: #e2e8f0;
  --border: #cbd5e1;
  --text: #0f172a;
  --text-dim: #64748b;
  --accent: #0284c7;
  --accent-2: #6366f1;
  --green: #059669;
  --red: #dc2626;
  --yellow: #d97706;
  --on-accent: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.9);
  --chart-grid: rgba(100, 116, 139, 0.22);
  --chart-tick: #475569;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #f1f5f9;
    --bg-soft: #e2e8f0;
    --bg-glow: #dbeafe;
    --panel: #ffffff;
    --panel-2: #e2e8f0;
    --border: #cbd5e1;
    --text: #0f172a;
    --text-dim: #64748b;
    --accent: #0284c7;
    --accent-2: #6366f1;
    --green: #059669;
    --red: #dc2626;
    --yellow: #d97706;
    --on-accent: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.9);
    --chart-grid: rgba(100, 116, 139, 0.22);
    --chart-tick: #475569;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
  }
}

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

html, body { overflow-x: clip; }

img, canvas, input, select, textarea, button { max-width: 100%; }
input, select, textarea { min-width: 0; }
.summ > *, .grid-2 > *, .grid-3 > *, .entry-form > *, .expense-form > *, .layout > * { min-width: 0; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, var(--bg-glow) 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 20px;
  padding-top: calc(14px + env(safe-area-inset-top));
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10;
}

nav .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  margin-right: 8px;
  letter-spacing: 0.5px;
}

nav .version {
  margin-left: auto;
  color: var(--text-dim);
  font-size: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 9px;
}

nav a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.95rem;
  transition: all 0.15s;
}

nav a:hover { background: var(--panel-2); color: var(--text); }
nav a.active { background: var(--accent); color: var(--on-accent); font-weight: 600; }

main {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  padding-bottom: calc(60px + env(safe-area-inset-bottom));
}

h1 { font-size: 1.5rem; margin-bottom: 4px; }
h2 { font-size: 1.15rem; margin-bottom: 14px; }
.subtitle { color: var(--text-dim); margin-bottom: 22px; font-size: 0.95rem; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.btn {
  background: var(--accent);
  color: var(--on-accent);
  border: none;
  border-radius: 9px;
  padding: 10px 16px;
  min-height: 44px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s, transform 0.05s;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover { filter: brightness(1.12); }
.btn:active { transform: translateY(1px); }
.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 500;
}
.btn.ghost:hover { background: var(--panel-2); }
.btn.danger { background: var(--red); color: #fff; }
.btn.small { padding: 8px 12px; min-height: 40px; font-size: 0.85rem; border-radius: 7px; }

input, select, textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 9px;
  padding: 10px 12px;
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
input:focus, select:focus { border-color: var(--accent); }
input::placeholder { color: var(--text-dim); }
button, input, select, textarea { -webkit-tap-highlight-color: transparent; }

.form-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.form-row > * { flex: 1; min-width: 130px; }
.form-row > span, .form-row .muted { flex: 0 0 auto; min-width: 0; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.stat { background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat .label { color: var(--text-dim); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }
.stat .value { font-size: 1.5rem; font-weight: 700; margin-top: 4px; overflow-wrap: anywhere; }
.stat .value.green { color: var(--green); }
.stat .value.red { color: var(--red); }
.stat .value.blue { color: var(--accent); }
.stat .value.yellow { color: var(--yellow); }

table { width: 100%; border-collapse: collapse; font-size: 0.93rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-dim); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }
tbody tr:hover { background: var(--panel-2); }
tr:last-child td { border-bottom: none; }

.tag { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.tag.income { background: rgba(52, 211, 153, 0.15); color: var(--green); }
.tag.expense { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.tag.neutral { background: var(--panel-2); color: var(--text-dim); }

.empty {
  text-align: center;
  color: var(--text-dim);
  padding: 34px 0;
  font-size: 0.95rem;
}

.muted { color: var(--text-dim); font-size: 0.85rem; }

.money-pos { color: var(--green); }
.money-neg { color: var(--red); }

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
  z-index: 100;
}
.toast.show { opacity: 1; }

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-scroll table { min-width: 560px; }

@media (max-width: 720px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  nav { flex-wrap: wrap; }
  nav a { padding: 8px 10px; font-size: 0.9rem; }
  main { padding-left: 14px; padding-right: 14px; }
  .card { padding: 14px; }
  h1 { font-size: 1.3rem; }
  .stat .value { font-size: 1.15rem; }
  .table-scroll table { min-width: 520px; }

  .currency-bar { flex-direction: column; align-items: stretch; }
  .currency-bar label { flex-direction: column; align-items: stretch; gap: 6px; width: 100%; }
  .currency-bar select { width: 100%; min-width: 0; }
  .currency-bar .btn, .currency-bar .muted { align-self: flex-start; }
}

@media (max-width: 480px) {
  .entry-form, .expense-form { grid-template-columns: 1fr !important; }
  .summ { grid-template-columns: 1fr 1fr; }
  .form-row > * { min-width: 0; flex: 1 1 100%; }
  .chip, .session-item .name, .debt-card, .balance-row { overflow-wrap: anywhere; }
}