:root {
  --bg-main: #0b0f19;
  --bg-card: rgba(23, 29, 48, 0.65);
  --accent-green: #00f59b;
  --accent-red: #ff4d6d;
  --accent-blue: #00d2ff;
  --text-primary: #ffffff;
  --text-muted: #8e9bb0;
  --border-color: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; }
body { background-color: var(--bg-main); color: var(--text-primary); min-height: 100vh; padding-bottom: 60px; }
.card { background: var(--bg-card); backdrop-filter: blur(12px); border: 1px solid var(--border-color); border-radius: 16px; padding: 20px; margin-bottom: 24px; box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25); }
.header { display: flex; justify-content: space-between; align-items: center; padding: 24px 5%; border-bottom: 1px solid var(--border-color); margin-bottom: 24px; }
.brand { font-size: 1.4rem; font-weight: 700; background: linear-gradient(90deg, var(--accent-blue), var(--accent-green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 20px; }
.stat-value { font-size: 2.2rem; font-weight: 700; margin-top: 10px; }
.income { color: var(--accent-green); } .expense { color: var(--accent-red); } .balance { color: var(--accent-blue); }
input, select, button { width: 100%; padding: 12px 16px; margin: 8px 0 16px; border-radius: 10px; border: 1px solid var(--border-color); background: rgba(11, 15, 25, 0.8); color: #fff; font-size: 0.95rem; }
input:focus, select:focus { outline: none; border-color: var(--accent-blue); }
button { background: linear-gradient(135deg, #0052d4, #4364f7, #6fb1fc); border: none; font-weight: 600; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s; }
button:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(67, 100, 247, 0.4); }
.progress-bar-bg { background: rgba(255, 255, 255, 0.1); height: 12px; border-radius: 6px; overflow: hidden; margin: 12px 0; }
.progress-bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent-blue), var(--accent-green)); transition: width 0.4s ease; }
.footer { text-align: center; font-size: 0.85rem; color: var(--text-muted); margin-top: 40px; }
@media (max-width: 600px) { .grid-2 { grid-template-columns: 1fr; } }