*{box-sizing:border-box}:root,[data-theme=purple]{--bg:#0a0a0f;--bg-card:#16161f;--bg-input:#0a0a0f;--border:#2a2a3a;--text:#e0e0e0;--text-muted:#888;--text-dim:#555;--accent:#667eea;--accent-hover:#8b9ff5;--accent-bg:#667eea1a;--gradient:linear-gradient(135deg, #667eea, #764ba2)}[data-theme=blue]{--bg:#0a0f1a;--bg-card:#0f1a2e;--bg-input:#0a0f1a;--border:#1e2d4a;--accent:#3b82f6;--accent-hover:#60a5fa;--accent-bg:#3b82f61a;--gradient:linear-gradient(135deg, #3b82f6, #1d4ed8)}[data-theme=green]{--bg:#0a0f0a;--bg-card:#0f1f0f;--bg-input:#0a0f0a;--border:#1e3a1e;--accent:#22c55e;--accent-hover:#4ade80;--accent-bg:#22c55e1a;--gradient:linear-gradient(135deg, #22c55e, #15803d)}[data-theme=warm]{--bg:#1a1410;--bg-card:#241c14;--bg-input:#1a1410;--border:#3a2a1a;--accent:#d4a574;--accent-hover:#e8c49a;--accent-bg:#d4a5741a;--gradient:linear-gradient(135deg, #d4a574, #92400e)}[data-theme=light]{--bg:#f8f9fa;--bg-card:#fff;--bg-input:#fff;--border:#e2e2e2;--text:#222;--text-muted:#666;--text-dim:#999;--accent:#667eea;--accent-hover:#4f6ce0;--accent-bg:#667eea14;--gradient:linear-gradient(135deg, #667eea, #764ba2)}[data-theme=midnight]{--bg:#0a0a0f;--bg-card:#1a1020;--bg-input:#0a0a0f;--border:#2a1a3a;--accent:#e11d48;--accent-hover:#f43f5e;--accent-bg:#e11d481a;--gradient:linear-gradient(135deg, #e11d48, #9f1239)}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:15px}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}.app-container{max-width:480px;min-height:100vh;margin:0 auto;padding:0 16px}.app-nav{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:100;background:#0a0a0ff2;justify-content:space-between;align-items:center;padding:12px 16px;display:flex;position:sticky;top:0}.app-nav-back{color:var(--accent);cursor:pointer;background:0 0;border:none;padding:4px 8px;font-size:14px}.app-nav-title{color:#fff;font-size:16px;font-weight:600}.app-nav-user{color:#888;cursor:pointer;background:0 0;border:none;font-size:20px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;padding:16px;transition:border-color .2s}.card:hover{border-color:#667eea4d}.btn-primary{background:var(--gradient);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:12px 24px;font-size:15px;font-weight:600;transition:opacity .2s}.btn-primary:hover{opacity:.9}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--bg-card);color:#ccc;border:1px solid var(--border);cursor:pointer;border-radius:8px;width:100%;padding:10px 20px;font-size:14px}.input{background:var(--bg-input);border:1px solid var(--border);color:#fff;border-radius:8px;outline:none;width:100%;padding:12px 14px;font-size:15px;transition:border-color .2s}.input:focus{border-color:var(--accent)}.input::placeholder{color:#555}.label{color:#888;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px;font-size:12px;display:block}.fab{background:var(--gradient);color:#fff;cursor:pointer;z-index:50;border:none;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;font-size:24px;transition:transform .2s;display:flex;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 16px #667eea66}.fab:hover{transform:scale(1.1)}.app-grid{grid-template-columns:repeat(2,1fr);gap:12px;padding:16px 0;display:grid}.app-grid-card{background:var(--bg-card);border:1px solid var(--border);text-align:center;cursor:pointer;border-radius:14px;padding:20px 16px;transition:all .2s}.app-grid-card:hover{border-color:var(--accent);transform:translateY(-2px)}.app-grid-card i{color:var(--accent);margin-bottom:10px;font-size:32px;display:block}.app-grid-card h3{color:#fff;margin:0 0 4px;font-size:14px;font-weight:600}.app-grid-card p{color:#888;margin:0;font-size:11px}.expense-amount{color:#fff;text-align:center;font-size:32px;font-weight:700}.expense-summary{border-bottom:1px solid var(--border);justify-content:space-around;margin-bottom:16px;padding:16px 0;display:flex}.expense-summary-item{text-align:center}.expense-summary-item .amount{color:#fff;font-size:20px;font-weight:600}.expense-summary-item .label{color:#888;text-transform:uppercase;font-size:11px}.expense-item{border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:12px 0;display:flex}.expense-item-icon{width:40px;height:40px;color:var(--accent);background:#667eea1a;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;display:flex}.expense-item-info{flex:1}.expense-item-info h4{color:#fff;margin:0;font-size:14px}.expense-item-info 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