:root{--bg: #0f1220;--panel: #1e2338;--input: #141829;--border: #2e364f;--text: #e8eaf1;--muted: #949ab0;--accent: #00bcd4;--accent-hover: #00acc1;--danger: #ff6b6b;--success: #00d287;--shadow: 0 4px 6px rgba(0, 0, 0, .3);--radius: 20px}[data-theme=light]{--bg: #f0f2f5;--panel: #ffffff;--input: #f9fafb;--border: #e5e7eb;--text: #1f2937;--muted: #6b7280;--accent: #00bcd4;--accent-hover: #00acc1;--danger: #ef4444;--success: #10b981;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,sans-serif;padding-bottom:calc(100px + env(safe-area-inset-bottom));transition:background-color .3s ease,color .3s ease;-webkit-font-smoothing:antialiased}.container{max-width:600px;margin:0 auto;padding:20px}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.app-title{font-size:20px;font-weight:800;background:linear-gradient(45deg,var(--accent),var(--success));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin:0}@keyframes spin{to{transform:rotate(360deg)}}.animate-spin{animation:spin 1s linear infinite}.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease;position:relative;overflow:hidden}.panel:hover{transform:translateY(-2px);box-shadow:0 8px 12px #0000001a}h1,h2,h3{margin:0 0 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var(--border);color:var(--muted)}.btn-outline:hover{border-color:var(--text);color:var(--text)}.btn-sm{padding:8px 16px;font-size:13px;width:auto;border-radius:6px}.btn-danger{color:var(--danger);border-color:var(--danger)}.btn-danger:hover{background:var(--danger);color:#fff}.btn-icon{padding:8px;border-radius:50%;background:var(--input);border:1px solid var(--border);color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:center}.btn-icon:hover{background:var(--border)}.chips-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;width:100%;margin-bottom:16px}.member-chip{padding:10px;background:var(--input);border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:all .2s 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var(--border);border-radius:8px;text-align:center;font-size:12px;font-weight:500;cursor:pointer;transition:all .2s}.chip:hover{border-color:var(--muted)}.chip.selected{background:#00bcd426;border-color:var(--accent);color:var(--accent)}.action-btn{width:32px;height:32px;border-radius:50%;border:1px solid transparent;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);background:transparent;color:var(--muted);display:flex;align-items:center;justify-content:center}.action-btn:hover{transform:scale(1.1);background:var(--input);color:var(--text);box-shadow:0 2px 8px #0000001a}.action-btn.edit:hover{background:#00bcd41a;color:var(--accent);border-color:#00bcd433}.action-btn.danger:hover{background:#ff6b6b1a;color:var(--danger);border-color:#ff6b6b33}.nav{position:fixed;bottom:0;left:0;right:0;background:var(--panel);border-radius:20px 20px 0 0;display:flex;justify-content:space-between;align-items:center;padding:10px 15px calc(10px + env(safe-area-inset-bottom));z-index:1000;box-shadow:0 -5px 25px #0000001a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:none;border-top:1px solid var(--border)}[data-theme=light] .nav{background:#fffffff2;border-color:#fff}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;color:var(--muted);cursor:pointer;transition:all .3s ease;padding:8px 0;position:relative}.nav-item-icon{font-size:24px;display:flex;align-items:center;justify-content:center}.nav-item-label{font-size:11px;font-weight:600;letter-spacing:.2px}.install-header-btn{background:#00bcd41a;border:1px solid var(--accent);color:var(--accent);transition:all .3s cubic-bezier(.4,0,.2,1)}.install-header-btn:hover{background:var(--accent);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px 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.2s}.toggle-opt.active{background:var(--panel);color:var(--text);font-weight:600;box-shadow:0 2px 4px #0000001a}.settle-row{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--border)}.pos{color:var(--success);font-weight:700}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:2000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:20px}.modal{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:24px;width:100%;max-width:400px;box-shadow:0 10px 25px #0003;animation:modal-pop .3s cubic-bezier(.34,1.56,.64,1)}@keyframes modal-pop{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.neg{color:var(--danger);font-weight:700}.group-item{display:flex;align-items:center;gap:16px;padding:12px 16px;border-radius:12px;cursor:pointer;transition:all 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var(--border)}.settle-row:last-child{border-bottom:none}.empty-state{text-align:center;padding:40px 20px;color:var(--muted)}.empty-state-icon{font-size:40px;margin-bottom:12px;display:block}.balances-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:480px){.balances-grid{grid-template-columns:1fr;gap:8px}}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;width:100%}.form-field{display:flex;flex-direction:column;gap:6px;width:100%;min-width:0}.form-label{font-size:13px;font-weight:600;color:var(--muted);margin:0 0 4px 4px}@media(max-width:480px){.form-grid{grid-template-columns:1fr;gap:16px}}.apple-login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg)}.apple-login-container{width:100%;max-width:420px;background:var(--panel);border-radius:32px;padding:64px 40px;text-align:center;box-shadow:0 10px 60px #00000014;border:1px solid rgba(255,255,255,.05);display:flex;flex-direction:column;gap:48px;animation:apple-fade-in .8s cubic-bezier(.16,1,.3,1)}[data-theme=light] .apple-login-container{box-shadow:0 10px 50px #0000000a}@keyframes apple-fade-in{0%{opacity:0;transform:translateY(20px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.apple-login-header{display:flex;flex-direction:column;align-items:center;gap:20px}.apple-login-logo{margin-bottom:8px}.apple-login-title{font-size:32px;font-weight:700;margin:0;letter-spacing:-.8px;color:var(--text)}.apple-login-subtitle{color:var(--muted);font-size:16px;line-height:1.5;margin:0;font-weight:400}.apple-login-content{display:flex;justify-content:center}.apple-google-wrapper{transition:transform .2s ease}.apple-google-wrapper:hover{transform:scale(1.02)}.apple-login-footer{margin-top:12px}.apple-login-footer p{font-size:12px;color:var(--muted);opacity:.5;margin:0;letter-spacing:.2px}