/* Split: clean modern look, mobile-friendly, no frameworks. */

:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #16213a;
  --muted: #68738a;
  --line: #e4e9f2;
  --brand: #4f46e5;
  --brand-dark: #4338ca;
  --good: #15803d;
  --good-bg: #e9f8ee;
  --bad: #b91c1c;
  --bad-bg: #fdecec;
  --warn-bg: #fff7e6;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(22, 33, 58, 0.07);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
}

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.brand { font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; }
.brand-emoji { margin-right: 6px; }
.topbar-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.stat-settle strong { color: var(--brand-dark); }
.me-box {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; margin: 10px 0 12px;
}
.me-box label { margin: 0; }
.me-box .hint { margin: 2px 0 8px; }
.amount-field { display: flex; gap: 8px; align-items: flex-end; }
.amount-field > label { flex: 1; min-width: 0; margin-bottom: 10px; }
.amount-field .currency-label { flex: 0 0 92px; }
.fxnote { color: var(--muted); font-weight: 600; font-size: 0.82rem; }

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 18px 16px 40px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 18px;
}
.card h2 { margin: 0 0 4px; font-size: 1.1rem; }
.card h3.sub { margin: 18px 0 8px; font-size: 0.95rem; color: var(--muted); }
.hint { margin: 0 0 12px; color: var(--muted); font-size: 0.88rem; }
.count { color: var(--muted); font-weight: 400; font-size: 0.85rem; }

.dashboard .stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}
.stat {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
}
.stat-label { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.stat strong { font-size: 1.15rem; }

.layout { display: grid; grid-template-columns: 1.6fr 1fr; gap: 18px; align-items: start; }
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

/* Lists */
.balance-list, .settleup-list, .expense-list, .settlement-list, .member-list {
  list-style: none; margin: 0; padding: 0;
}
.balance-list li, .settleup-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 9px 4px; border-top: 1px solid var(--line); gap: 8px;
}
.balance-list li:first-child, .settleup-list li:first-child { border-top: 0; }
.badge { font-weight: 700; padding: 3px 10px; border-radius: 999px; font-size: 0.85rem; white-space: nowrap; }
.badge.pos { background: var(--good-bg); color: var(--good); }
.badge.neg { background: var(--bad-bg); color: var(--bad); }
.badge.zero { background: var(--bg); color: var(--muted); }
.me { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 8px; }
.empty { color: var(--muted); font-size: 0.9rem; }
.settle-btn { margin-left: 0; }

/* Settle up rows: keep each row on a single line on narrow screens */
.settleup-list li { flex-wrap: nowrap; gap: 6px; }
.settleup-list li > span:first-child {
  min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.settleup-list li > span:last-child {
  display: inline-flex; align-items: center; gap: 6px;
  flex: 0 0 auto; white-space: nowrap;
}
.settleup-list .settle-btn { padding: 4px 9px; font-size: 0.78rem; }
@media (max-width: 480px) {
  .settleup-list li { padding: 8px 2px; font-size: 0.84rem; gap: 6px; }
  .settleup-list li strong { font-size: 0.84rem; }
  .settleup-list .settle-btn { padding: 3px 7px; font-size: 0.71rem; }
}
@media (max-width: 380px) {
  .settleup-list li { font-size: 0.8rem; gap: 5px; }
  .settleup-list li strong { font-size: 0.8rem; }
  .settleup-list .settle-btn { padding: 3px 6px; font-size: 0.68rem; }
}

/* Forms */
label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 10px; }
input[type="text"], input[type="number"], input[type="date"], select {
  width: 100%;
  margin-top: 4px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 0.95rem;
  background: #fff;
  color: var(--ink);
}
input:focus, select:focus, button:focus { outline: 2px solid var(--brand); outline-offset: 1px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
@media (max-width: 560px) { .grid2, .grid3 { grid-template-columns: 1fr; } }

.splitmode { border: 1px solid var(--line); border-radius: 9px; padding: 8px 12px; margin: 0 0 12px; display: flex; gap: 16px; flex-wrap: wrap; }
.splitmode legend { font-size: 0.8rem; color: var(--muted); padding: 0 6px; }
.splitmode label { margin: 0; font-weight: 500; display: flex; gap: 6px; align-items: center; }

.participants { display: grid; gap: 8px; margin-bottom: 10px; }
.part-row {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--line); border-radius: 9px; padding: 7px 10px;
}
.part-row input[type="checkbox"] { width: 18px; height: 18px; }
.part-row .pname { flex: 1; font-weight: 600; font-size: 0.9rem; }
.part-row .pval { width: 110px; margin: 0; }
.part-row.off { opacity: 0.55; }

.preview {
  background: var(--bg);
  border: 1px dashed var(--line);
  border-radius: 9px;
  padding: 10px 12px;
  font-size: 0.88rem;
  margin-bottom: 10px;
  min-height: 20px;
}
.preview.ok { border-style: solid; border-color: #bfe6c9; background: var(--good-bg); }
.preview.bad { border-color: #f3b4b4; background: var(--bad-bg); }

.error {
  background: var(--bad-bg); color: var(--bad);
  border-radius: 9px; padding: 8px 12px; font-size: 0.88rem; margin-bottom: 10px;
}

.form-actions { display: flex; gap: 8px; margin-top: 4px; }
.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 9px;
  padding: 9px 14px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
}
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-dark); }
.btn.small { padding: 4px 10px; font-size: 0.8rem; }
.btn.danger { color: var(--bad); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Expense items */
.expense-list li, .settlement-list li {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 10px;
}
.exp-head { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.exp-head strong { font-size: 0.98rem; }
.exp-desc { flex: 1; min-width: 0; }
.exp-amount { font-weight: 800; white-space: nowrap; flex: 0 0 auto; }
.exp-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px;
  color: var(--muted); font-size: 0.82rem; margin: 6px 0;
}
.exp-eq { color: var(--muted); }
.exp-shares { font-size: 0.85rem; display: flex; flex-wrap: wrap; gap: 6px; }
.exp-shares span { background: var(--bg); border: 1px solid var(--line); border-radius: 999px; padding: 2px 9px; }
.exp-actions { margin-top: 8px; display: flex; gap: 6px; }
.cat { background: #eef0ff; color: var(--brand-dark); border-radius: 6px; padding: 1px 7px; font-size: 0.78rem; font-weight: 700; }

/* Members */
.member-list li {
  position: relative;
  display: flex; align-items: center; gap: 8px;
  padding: 7px 2px; border-top: 1px solid var(--line);
}
.member-list li:first-child { border-top: 0; }
.member-list .mname { flex: 1; font-weight: 600; }
.member-form { position: relative; display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; align-items: stretch; }
.member-form #member-name { flex: 1 1 150px; min-width: 0; }
.emoji-field { position: relative; }
.emoji-btn {
  border: 1px solid var(--line); background: #fff; border-radius: 9px;
  width: 46px; min-height: 40px; padding: 0;
  font-size: 1.25rem; line-height: 1; cursor: pointer;
}
.emoji-btn:hover { background: var(--bg); }
.emoji-pop {
  position: absolute; z-index: 60; left: 0; right: 0; bottom: calc(100% + 6px);
  width: auto; padding: 8px;
  display: grid; grid-template-columns: repeat(8, 1fr); gap: 2px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow);
}
.emoji-pop button {
  font-size: 1.2rem; line-height: 1.4; padding: 2px 0; border: 0; background: transparent;
  border-radius: 8px; cursor: pointer;
}
.emoji-pop button:hover, .emoji-pop button:focus { background: var(--bg); outline: none; }
.emoji-pop[hidden] { display: none; }
.emoji-pop button.none { grid-column: 1 / -1; font-size: 0.8rem; color: var(--muted); padding: 6px 0; }
.member-list .emoji-btn { width: 34px; min-height: 30px; font-size: 1.05rem; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  z-index: 50;
}

.footer { text-align: center; color: var(--muted); font-size: 0.8rem; margin-top: 10px; }
.footer code { background: #fff; border: 1px solid var(--line); border-radius: 5px; padding: 0 5px; }
.footer #demo-reset { margin-left: 8px; vertical-align: middle; }
.demo-badge {
  background: var(--warn-bg); color: #92400e; border: 1px solid #f0d9a8;
  border-radius: 999px; padding: 3px 9px; font-size: 0.68rem; font-weight: 800;
  letter-spacing: 0.09em; text-transform: uppercase;
}

/* Burger menu + view navigation */
[data-view][hidden] { display: none; }

.menu-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 40px; padding: 0; flex: 0 0 auto;
  border: 1px solid var(--line); background: #fff; border-radius: 10px; cursor: pointer;
}
.menu-btn:hover { background: var(--bg); }
.menu-bars { display: grid; gap: 4px; }
.menu-bars span { display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--ink); }
.view-title { color: var(--muted); font-weight: 700; font-size: 0.95rem; margin-right: auto; }
@media (max-width: 640px) { .view-title { display: none; } }

.nav-drawer {
  position: fixed; top: 0; left: 0; height: 100vh; height: 100dvh; width: min(80vw, 296px);
  background: #fff; border-right: 1px solid var(--line);
  box-shadow: 0 12px 40px rgba(22, 33, 58, 0.18);
  padding: 14px 10px; z-index: 60;
  display: flex; flex-direction: column; gap: 4px; overflow-y: auto;
  transform: translateX(-102%); visibility: hidden;
  transition: transform 0.2s ease, visibility 0.2s ease;
}
.nav-drawer.open { transform: translateX(0); visibility: visible; }
.nav-head {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--muted); font-weight: 800; padding: 6px 12px 8px;
}
.nav-item {
  display: flex; align-items: center; gap: 12px; width: 100%; text-align: left;
  border: 0; background: transparent; color: var(--ink);
  padding: 12px; border-radius: 10px; font-size: 0.95rem; font-weight: 600; cursor: pointer;
}
.nav-item:hover { background: var(--bg); }
.nav-item.active { background: var(--brand); color: #fff; }
.nav-ico { width: 22px; text-align: center; font-size: 1.05rem; flex: 0 0 auto; }
.nav-backdrop {
  position: fixed; inset: 0; z-index: 55; background: rgba(22, 33, 58, 0.38);
  opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
}
.nav-backdrop.open { opacity: 1; pointer-events: auto; }
.nav-backdrop[hidden] { display: none; }