:root{--paper: #f4ede1;--paper-raised: #fbf7ee;--paper-dark: #e8ddc7;--ink: #2b2018;--ink-soft: #6b5d4d;--forest: #2b3a2f;--forest-light: #3d5142;--rust: #b6502f;--rust-light: #d97b52;--line: #d8cbb0;--success: #3f6b4a;--danger: #a8412e;--font-display: "Fraunces", serif;--font-body: "Work Sans", sans-serif;--font-mono: "JetBrains Mono", monospace;--radius: 10px;--shadow-card: 0 2px 0 var(--line), 0 8px 24px -12px rgba(43, 32, 24, .25)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--paper);background-image:radial-gradient(circle at 20% 10%,rgba(182,80,47,.05),transparent 40%),radial-gradient(circle at 90% 80%,rgba(43,58,47,.06),transparent 40%);color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased}h1,h2,h3,.display{font-family:var(--font-display);font-weight:600;letter-spacing:-.01em;margin:0}.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}a{color:inherit}button{font-family:var(--font-body);cursor:pointer;border:none;background:none}input,select{font-family:var(--font-body);font-size:1rem}.app-shell{max-width:560px;margin:0 auto;min-height:100dvh;padding:20px 18px 100px;position:relative}.topbar{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:24px;padding-bottom:14px;border-bottom:2px solid var(--ink)}.topbar .brand{font-family:var(--font-display);font-size:1.4rem;font-weight:600}.topbar .brand span{color:var(--rust)}.card{background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-card);padding:18px;margin-bottom:14px}.trip-card{display:block;text-decoration:none;color:inherit;position:relative;padding-left:22px;transition:transform .15s ease}.trip-card:active{transform:scale(.98)}.trip-card:before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:4px;background:var(--rust);border-radius:3px}.trip-card .trip-name{font-size:1.15rem;margin-bottom:4px}.trip-card .trip-meta{font-size:.82rem;color:var(--ink-soft)}.trip-card.archived .trip-name{color:var(--ink-soft)}.trip-card.archived:before{background:var(--line)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 20px;border-radius:999px;font-weight:500;font-size:.95rem;transition:transform .1s ease,opacity .15s ease}.btn:active{transform:scale(.96)}.btn-primary{background:var(--forest);color:var(--paper-raised)}.btn-rust{background:var(--rust);color:var(--paper-raised)}.btn-ghost{background:transparent;color:var(--forest);border:1.5px solid var(--forest)}.btn-full{width:100%}.btn-sm{padding:8px 14px;font-size:.85rem}.btn:disabled{opacity:.4;pointer-events:none}.fab{position:fixed;bottom:26px;right:50%;transform:translate(280px);width:58px;height:58px;border-radius:50%;background:var(--rust);color:var(--paper-raised);font-size:1.8rem;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px -6px #b6502f99}@media (max-width: 620px){.fab{right:24px;transform:none}}.field{margin-bottom:16px}.field label{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);margin-bottom:6px}.field input,.field select{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:8px;background:var(--paper-raised);color:var(--ink)}.field input:focus,.field select:focus{outline:none;border-color:var(--rust)}.chip-row{display:flex;flex-wrap:wrap;gap:8px}.chip{padding:8px 14px;border-radius:999px;border:1.5px solid var(--line);font-size:.85rem;background:var(--paper-raised)}.chip.active{background:var(--forest);border-color:var(--forest);color:var(--paper-raised)}.expense-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px dashed var(--line)}.expense-row:last-child{border-bottom:none}.expense-row .left{display:flex;flex-direction:column;gap:2px}.expense-row .title{font-weight:500}.expense-row .sub{font-size:.78rem;color:var(--ink-soft)}.expense-row .amount{font-family:var(--font-mono);font-weight:500}.settlement-row .title{color:var(--forest-light);font-style:italic}.balance-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0}.balance-name{font-weight:500}.balance-amount.positive{color:var(--success)}.balance-amount.negative{color:var(--danger)}.settle-line{display:flex;align-items:center;gap:8px;padding:10px 12px;background:var(--paper-dark);border-radius:8px;margin-bottom:8px;font-size:.9rem}.settle-line .arrow{color:var(--rust)}.section-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);margin:22px 0 10px}.badge{display:inline-block;font-size:.7rem;padding:3px 8px;border-radius:999px;background:var(--forest);color:var(--paper-raised);text-transform:uppercase;letter-spacing:.04em}.badge-outline{background:transparent;border:1px solid var(--ink-soft);color:var(--ink-soft)}.empty-state{text-align:center;padding:40px 20px;color:var(--ink-soft)}.center-screen{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center}.link-underline{text-decoration:underline;text-decoration-color:var(--rust);text-underline-offset:3px}