:root {
  color-scheme: light;
  font-family: Inter, ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #31251d;
  background: #fff8ef;
  --paper: #fffdf9;
  --ink: #31251d;
  --muted: #78695f;
  --line: #eadbcd;
  --accent: #e85d3f;
  /* Nền cho mọi vùng đặc có chữ trắng: #e85d3f chỉ 3.46:1, dưới ngưỡng AA. */
  --accent-solid: #cc4729;
  --accent-dark: #b83e27;
  --accent-soft: #fff0e9;
  --green: #18785b;
  --green-soft: #e8f7ef;
  --yellow: #8b6508;
  --yellow-soft: #fff5cb;
  --blue: #3167b1;
  --blue-soft: #eaf2ff;
  --danger: #b9372b;
  --shadow: 0 14px 40px rgb(92 55 32 / 10%);
  --radius: 20px;
}

* { box-sizing: border-box; }

html {
  min-height: 100%;
  background: radial-gradient(circle at 5% 0%, rgb(255 197 132 / 28%), transparent 28rem), #fff8ef;
}

body {
  min-height: 100vh;
  max-width: 560px;
  margin: 0 auto;
  padding: 1rem 1rem 6.5rem;
  background: linear-gradient(180deg, rgb(255 253 249 / 72%), rgb(255 248 239 / 92%));
}

h1, h2, p, ul { margin: 0; }
h1, h2, strong { letter-spacing: -0.02em; }
h1 { font-size: clamp(1.65rem, 8vw, 2.4rem); line-height: 1.08; }
h2 { font-size: 1.08rem; }
a { color: var(--accent-dark); }

button, input, select {
  min-width: 0;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font: inherit;
}

input, select {
  width: 100%;
  padding: 0.68rem 0.78rem;
  color: var(--ink);
  background: #fff;
  outline: none;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(232 93 63 / 14%);
}

input[type="checkbox"] {
  width: 1.4rem;
  min-height: 1.4rem;
  margin: 0;
  accent-color: var(--accent);
}

button {
  padding: 0.68rem 0.95rem;
  border-color: var(--accent-solid);
  color: #fff;
  background: var(--accent-solid);
  font-weight: 750;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, box-shadow 120ms ease;
}

button:hover { background: var(--accent-dark); box-shadow: 0 8px 20px rgb(184 62 39 / 18%); }
button:active { transform: translateY(1px); }
button:focus-visible, a:focus-visible, summary:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}
button:disabled, input:disabled { cursor: not-allowed; opacity: 0.58; }
form { display: grid; gap: 0.7rem; }
label { color: var(--muted); font-size: 0.88rem; font-weight: 700; }

.home, .room, .bill-tab, .people-list, .results-list, .payment-page, .payment-direction { display: grid; gap: 1rem; }

.home { align-content: center; min-height: calc(100vh - 7.5rem); }
.hero { position: relative; display: grid; justify-items: center; padding: 1.5rem 0.5rem 1.1rem; text-align: center; }
.hero-lottie {
  position: absolute;
  z-index: 0;
  top: -1.2rem;
  left: 50%;
  width: 240px;
  height: 165px;
  pointer-events: none;
  transform: translateX(-50%);
}
.hero > :not(.hero-lottie) { position: relative; z-index: 1; }
.brand-mark {
  position: relative;
  display: grid;
  width: 76px;
  height: 76px;
  place-items: center;
  border-radius: 23px;
  color: #fff;
  background: linear-gradient(145deg, #ff8465, #dc422d);
  box-shadow: 0 16px 32px rgb(184 62 39 / 24%);
  transform: rotate(-3deg);
}

.lucide-icon {
  display: block;
  width: 24px;
  height: 24px;
  background: currentColor;
  -webkit-mask: center / contain no-repeat;
  mask: center / contain no-repeat;
}
.icon-receipt { -webkit-mask-image: url("/static/icons/receipt-text.svg"); mask-image: url("/static/icons/receipt-text.svg"); }
.icon-sparkles { -webkit-mask-image: url("/static/icons/sparkles.svg"); mask-image: url("/static/icons/sparkles.svg"); }
.icon-party { -webkit-mask-image: url("/static/icons/party-popper.svg"); mask-image: url("/static/icons/party-popper.svg"); }
.icon-login { -webkit-mask-image: url("/static/icons/log-in.svg"); mask-image: url("/static/icons/log-in.svg"); }
.icon-chevron { -webkit-mask-image: url("/static/icons/chevron-right.svg"); mask-image: url("/static/icons/chevron-right.svg"); }
.icon-trash { -webkit-mask-image: url("/static/icons/trash-2.svg"); mask-image: url("/static/icons/trash-2.svg"); }
.brand-mark > .lucide-icon { width: 38px; height: 38px; }
.brand-spark {
  position: absolute;
  right: -6px;
  bottom: -5px;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 3px solid var(--paper);
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
}
.brand-spark .lucide-icon { width: 14px; height: 14px; }
.brand-name { margin-top: 0.8rem; color: var(--accent-dark); font-size: 0.78rem; font-weight: 850; letter-spacing: 0.14em; text-transform: uppercase; }
.hero h1 { margin-top: 0.55rem; color: var(--ink); }
.hero p { margin-top: 0.55rem; color: var(--muted); }

.home-actions { display: grid; gap: 0.75rem; }

.room-history { display: grid; gap: 0.65rem; margin-top: 0.35rem; }
.room-history[hidden] { display: none; }
.room-history h2 { padding: 0 0.2rem; color: var(--muted); font-size: 0.9rem; }
.history-room {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--ink);
  background: var(--paper);
  box-shadow: 0 8px 24px rgb(92 55 32 / 8%);
  text-decoration: none;
}
.history-room > span { display: grid; gap: 0.1rem; min-width: 0; }
.history-room > span:last-child { justify-items: end; }
.history-room strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.history-room b { color: var(--accent-dark); font-size: 0.8rem; letter-spacing: 0.08em; }
.history-room small { color: var(--muted); font-size: 0.76rem; }

.action-card {
  overflow: hidden;
  border: 1px solid rgb(234 219 205 / 90%);
  border-radius: 18px;
  background: var(--paper);
  box-shadow: 0 10px 30px rgb(92 55 32 / 8%);
}

.action-card summary {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.8rem;
  min-height: 78px;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
}

.action-card summary::-webkit-details-marker { display: none; }
.action-card summary:focus-visible { outline: 3px solid var(--ink); outline-offset: -3px; }
.action-card summary > span:nth-child(2) { display: grid; gap: 0.12rem; }
.action-card summary strong { font-size: 1rem; }
.action-card summary small { color: var(--muted); font-size: 0.82rem; }

.action-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, #ff815f, var(--accent));
  box-shadow: 0 7px 16px rgb(232 93 63 / 20%);
}

.action-icon .lucide-icon { width: 23px; height: 23px; }
.action-icon.secondary { color: var(--blue); background: var(--blue-soft); box-shadow: none; }
.action-chevron { display: grid; color: #b7a79a; transition: transform 160ms ease; }
.action-chevron .lucide-icon { width: 21px; height: 21px; }
.action-card[open] .action-chevron { transform: rotate(90deg); }
.action-card[open] summary { background: linear-gradient(135deg, #fff, var(--accent-soft)); }

.action-card form {
  padding: 0.25rem 1rem 1rem;
  border-top: 1px solid var(--line);
  background: #fffaf5;
}

.action-card form label { margin-top: 0.8rem; }
.room-code-input { font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; }

.card, .bill-card, .person-row, .result-row, .transfer-card, .invite-card, .settlements, .new-bill {
  border: 1px solid rgb(234 219 205 / 86%);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.card { display: grid; gap: 1rem; padding: 1.2rem; }

.room-head {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto 44px;
  align-items: center;
  gap: 0.65rem;
  margin: -1rem -1rem 0;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgb(234 219 205 / 80%);
  background: rgb(255 253 249 / 91%);
  backdrop-filter: blur(14px);
}

.room-head h1 { overflow: hidden; font-size: 1.18rem; text-overflow: ellipsis; white-space: nowrap; }

.back {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 50%;
  color: var(--ink);
  background: var(--accent-soft);
  font-size: 2rem;
  line-height: 1;
  text-decoration: none;
}

.room-code, .mode-chip, .payer-tag, .assignee-chip, .claim-count {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
  white-space: nowrap;
}

.room-code { padding: 0.3rem 0.55rem; color: var(--accent-dark); background: var(--accent-soft); letter-spacing: 0.08em; }

.qr {
  border: 4px solid #fff;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 5px 18px rgb(49 37 29 / 13%);
}

/* QR phóng to dùng <dialog> ở top layer. Không đặt position:fixed bên trong
   .room-head: header là sticky + backdrop-filter nên nó vừa là containing block
   vừa là stacking context, z-index của con bị kẹt lại trong layer của header và
   click không tới được phần tử. Dialog để trần: chỉ có QR nổi trên nền tối. */
.qr-modal {
  max-width: none;
  max-height: none;
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.qr-modal::backdrop { background: rgb(49 37 29 / 72%); }

/* Bọc QR trong button để bàn phím tới được; mọi style nút mặc định phải tắt. */
.qr-modal-close {
  display: block;
  width: auto;
  min-height: 0;
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
  cursor: zoom-out;
}

.qr-modal-close:hover { background: transparent; box-shadow: none; }
/* Ring tối mặc định vô hình trên nền tối. */
.qr-modal-close:focus-visible { outline: 3px solid #fff; outline-offset: 4px; }
.qr-modal-close img {
  display: block;
  width: min(80vw, 360px);
  height: min(80vw, 360px);
  border: 12px solid #fff;
  border-radius: 20px;
  background: #fff;
}

.hello { color: var(--muted); font-size: 0.92rem; }
.join-banner { margin-top: 0.2rem; background: var(--yellow-soft); }

.tabs {
  position: fixed;
  z-index: 30;
  right: max(1rem, calc((100vw - 528px) / 2));
  bottom: 0.85rem;
  left: max(1rem, calc((100vw - 528px) / 2));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.35rem;
  padding: 0.38rem;
  border: 1px solid rgb(234 219 205 / 90%);
  border-radius: 18px;
  background: rgb(255 253 249 / 94%);
  box-shadow: 0 16px 40px rgb(67 43 29 / 20%);
  backdrop-filter: blur(16px);
}

.tab { min-height: 48px; padding: 0.5rem; border-color: transparent; color: var(--muted); background: transparent; box-shadow: none; }
.tab:hover { color: var(--accent-dark); background: var(--accent-soft); box-shadow: none; }
.tab.active { color: #fff; background: var(--accent-solid); }
.tabpanel { display: none; }
.tabpanel.active { display: block; animation: tab-enter 220ms ease-out both; }
@keyframes tab-enter { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: translateY(0); } }

.bill-tab-action {
  display: grid;
  width: 100%;
  justify-self: center;
  place-items: center;
  overflow: hidden;
  transition: width 240ms ease, border-radius 240ms ease, transform 240ms ease, background 180ms ease;
}
.bill-tab-action > span { grid-area: 1 / 1; transition: opacity 180ms ease, transform 240ms cubic-bezier(.2,.8,.2,1); }
.bill-tab-plus { opacity: 0; font-size: 1.65rem; line-height: 1; transform: rotate(-90deg) scale(0.45); }
.bill-tab-action.active { width: 48px; padding: 0; border-radius: 50%; }
.bill-tab-action.active .bill-tab-label { opacity: 0; transform: scale(0.55); }
.bill-tab-action.active .bill-tab-plus { opacity: 1; transform: rotate(0) scale(1); }

.subtabs {
  position: sticky;
  z-index: 20;
  top: 4.3rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
  padding: 0.35rem;
  border: 1px solid rgb(234 219 205 / 90%);
  border-radius: 16px;
  background: rgb(255 253 249 / 94%);
  box-shadow: 0 10px 28px rgb(67 43 29 / 13%);
  backdrop-filter: blur(16px);
}
.subtab { min-height: 44px; padding: 0.45rem; border-color: transparent; color: var(--muted); background: transparent; box-shadow: none; }
.subtab:hover { color: var(--accent-dark); background: var(--accent-soft); box-shadow: none; }
.subtab.active { color: #fff; background: var(--accent-solid); }
.bill-tab[data-filter="self"] [data-bill-owner="other"],
.bill-tab[data-filter="other"] [data-bill-owner="self"],
.payment-page[data-filter="incoming"] [data-payment-direction="outgoing"],
.payment-page[data-filter="outgoing"] [data-payment-direction="incoming"] { display: none; }

.bill-card { overflow: hidden; scroll-margin-top: 9rem; }

.bill-card > header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, #fff, var(--accent-soft));
}

.bill-card > header h2 { flex: 1 1 100%; }
.payer-tag { padding: 0.28rem 0.55rem; color: var(--accent-dark); background: #ffe2d7; }
.mode-chip { padding: 0.28rem 0.55rem; color: var(--blue); background: var(--blue-soft); }
.assignee-chip { padding: 0.25rem 0.5rem; color: var(--green); background: var(--green-soft); }
.claim-count { padding: 0.2rem 0.45rem; color: var(--yellow); background: var(--yellow-soft); }

.danger-link {
  min-height: 44px;
  padding: 0.35rem 0.55rem;
  border-color: transparent;
  color: var(--danger);
  background: transparent;
  font-size: 0.78rem;
  box-shadow: none;
}

.danger-link:hover { color: #fff; background: var(--danger); }
.item-list { display: grid; padding: 0; list-style: none; }

.item-list > li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.45rem 0.7rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px dashed var(--line);
}

.item-list > li > label { display: flex; grid-column: 1 / -1; align-items: center; min-height: 44px; gap: 0.55rem; color: #6b4c05; cursor: pointer; }
.item-list > li > .mode-chip,
.item-list > li > .assignee-chip,
.item-list > li > .share-chip,
.item-list > li > .claim-count { grid-column: 1 / -1; }
.item-list > li > strong { overflow: hidden; text-overflow: ellipsis; }
.item-editor { grid-column: 1 / -1; }
/* Summary tự co lại; container thì luôn full width để cột 1fr của form không
   bị tính về 0px. */
.item-editor > summary { width: fit-content; }
.item-editor > summary, .new-item-panel > summary {
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}
.item-editor > summary::-webkit-details-marker, .new-item-panel > summary::-webkit-details-marker { display: none; }
.item-editor > summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.3rem 0;
  color: var(--accent-dark);
  font-size: 0.82rem;
}

.edit-item, .new-item {
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, 1fr) 5.5rem;
  margin-top: 0.45rem;
  padding: 0.7rem;
  border-radius: 14px;
  background: #f8f3ed;
}

.field { display: grid; gap: 0.25rem; }
.field > span { color: var(--muted); font-size: 0.78rem; font-weight: 700; }
.edit-item > .field, .new-item > .field, .new-bill > .field { grid-column: 1 / -1; }
/* Giá + số lượng đứng cùng hàng, phải KỀ NHAU trong DOM: auto-placement chạy
   theo hàng và không lùi lại được, nên nếu chỉ ghim ô đầu vào cột 1 thì ô cột 2
   tụt xuống hàng riêng và cả hai đều lệch nửa chiều ngang. */
.edit-item > .field-price, .new-item > .field-price { grid-column: 1; }
.edit-item > .field-qty, .new-item > .field-qty { grid-column: 2; }
.edit-item > button, .new-item > button { grid-column: 1 / -1; }
.new-item { margin: 0; padding: 1rem; border-top: 1px solid var(--line); border-radius: 0; }
.new-item-panel > summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.85rem 1rem;
  color: var(--accent-dark);
  background: #fffaf4;
}
.new-item-panel[open] > summary { border-bottom: 1px solid var(--line); }
.bill-total { display: flex; justify-content: space-between; padding: 0.85rem 1rem; background: #fffaf4; }
.new-bill { padding: 1rem; }
.new-bill-panel > summary {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1rem;
  color: var(--accent-dark);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}
.new-bill-panel > summary::-webkit-details-marker { display: none; }
.new-bill-panel > .new-bill { width: 100%; }
.grand-total { padding: 0.95rem 1rem; border-radius: 14px; color: var(--accent-dark); background: var(--accent-soft); text-align: right; }
.grand-total.positive { color: #0f5f42; background: var(--green-soft); }
.grand-total.negative { color: var(--danger); background: #fdecea; }
.empty { padding: 2rem 1rem; color: var(--muted); text-align: center; }

.invite-card { padding: 0; }
.invite-card > summary {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 56px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  list-style: none;
}
.invite-card > summary::-webkit-details-marker { display: none; }
.invite-summary-main { display: grid; flex: 1 1 auto; gap: 0.1rem; }
.invite-summary-main small { color: var(--muted); font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 0.8rem; }
.invite-copy { min-height: 44px; padding: 0.5rem 0.8rem; font-size: 0.82rem; }
.invite-body { display: grid; justify-items: center; gap: 0.8rem; padding: 0 1.25rem 1.25rem; text-align: center; }
.invite-card .qr { width: min(54vw, 190px); height: min(54vw, 190px); }
.section-heading { display: flex; align-items: center; gap: 0.45rem; padding: 0 0.2rem; }
.section-heading .count {
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  color: var(--muted);
  background: var(--accent-soft);
  font-size: 0.8rem;
}
.payment-section { display: grid; gap: 0.6rem; }
.invite-link { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 0.9rem; }

.person-row, .result-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.35rem 0.75rem;
  padding: 0.95rem;
}

.avatar {
  display: grid;
  grid-row: span 2;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-dark), var(--accent-solid));
  font-weight: 850;
  box-shadow: 0 5px 14px rgb(184 62 39 / 22%);
}

.person-row label { display: flex; align-items: center; gap: 0.4rem; white-space: nowrap; }
.payment-form, .payment-summary {
  display: grid;
  gap: 0.55rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--blue-soft);
}
.payment-form h3 { margin: 0; font-size: 1rem; }
.payment-form small, .payment-summary span { color: var(--muted); font-size: 0.78rem; }
.payment-summary {
  grid-column: 2 / -1;
  gap: 0.2rem;
  padding: 0.4rem 0.6rem;
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.78rem;
}
.payment-summary strong { color: var(--blue); }
.result-row { grid-template-columns: 44px minmax(0, 1fr); }
.result-row > span:not(.avatar), .result-row > .balance, .result-row > .paid-flag, .result-row > button { grid-column: 2; }
.result-row > span:not(.avatar) { color: var(--muted); font-size: 0.86rem; }
.balance { margin-top: 0.25rem; font-size: 1.06rem; }
.balance.positive { color: var(--green); }
.balance.negative { color: var(--danger); }
.balance.settled { color: var(--muted); }

.paid-flag { padding: 0.55rem 0.65rem; border-radius: 10px; color: var(--green); background: var(--green-soft); font-size: 0.82rem; }
.result-row > button { justify-self: start; margin-top: 0.35rem; }
.settlements { display: grid; gap: 0.65rem; padding: 1rem; }
.settlement-row { display: grid; gap: 0.55rem; }
.settlements p { padding: 0.7rem; border-radius: 12px; color: var(--blue); background: var(--blue-soft); font-weight: 700; }
.transfer-qr { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.transfer-qr summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.7rem;
  color: var(--accent-dark);
  cursor: pointer;
  font-weight: 750;
}
.transfer-qr img { display: block; width: min(100%, 320px); height: auto; margin: 0 auto; }
.transfer-qr small { display: block; padding: 0.65rem; color: var(--muted); text-align: center; }
.missing-payment { color: var(--muted); }
.transfer-card {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.4rem 0.65rem;
  padding: 0.8rem;
}
.transfer-card > .avatar { width: 38px; height: 38px; font-size: 0.9rem; }
.transfer-main { display: grid; gap: 0.1rem; }
.transfer-main small { color: var(--muted); font-size: 0.76rem; }
.transfer-amount { font-size: 0.98rem; white-space: nowrap; }
.transfer-amount.positive { color: var(--green); }
.transfer-amount.negative { color: var(--danger); }
.transfer-card > .paid-flag, .transfer-card > .payment-account, .transfer-card > .transfer-qr, .transfer-card > .missing-payment, .transfer-card > button { grid-column: 2 / -1; }
.transfer-card > button { min-height: 44px; justify-self: start; padding: 0.5rem 0.8rem; font-size: 0.85rem; }
.payment-account {
  display: grid;
  gap: 0.18rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--blue-soft);
}
.payment-account > span { display: flex; flex-wrap: wrap; gap: 0.35rem 0.55rem; }
.payment-account strong { color: var(--blue); }
.payment-account b { overflow-wrap: anywhere; }
.payment-account small { overflow: hidden; color: var(--muted); font-size: 0.74rem; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 430px) {
  body { padding-right: 0.75rem; padding-left: 0.75rem; }
  .room-head { margin-right: -0.75rem; margin-left: -0.75rem; padding-right: 0.75rem; padding-left: 0.75rem; }
  .edit-item, .new-item { grid-template-columns: minmax(0, 1fr) 5.5rem; }
  .edit-item input[name="name"], .new-item input[name="name"], .edit-item select, .new-item select { grid-column: 1 / -1; }
  .person-row { grid-template-columns: 44px minmax(0, 1fr); }
  .person-row label { grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
  .hero-lottie { display: none; }
  .tabpanel.active { animation: none; }
}

/* Cảnh báo tiền chưa ai nhận: trước đây payer gánh im lặng, dấu hiệu duy nhất
   là chip "0 người" ở tab khác. */
.warn-banner {
  padding: 0.85rem 1rem;
  border: 1px solid #f0d68a;
  border-radius: 14px;
  color: #6b4c05;
  background: var(--yellow-soft);
  font-size: 0.88rem;
}

.warn-banner strong { color: #5a3f04; }
.warn-chip {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  color: #6b4c05;
  background: var(--yellow-soft);
  font-size: 0.76rem;
  font-weight: 800;
}

.claim-count.is-warn { color: #6b4c05; background: #ffe9a8; }
.share-chip {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 0.76rem;
  font-weight: 800;
}

.item-list > li.is-unclaimed { background: #fffdf0; box-shadow: inset 3px 0 0 #e0b640; }

/* Icon xóa: "Xóa bill" từng là link chữ nằm lẫn giữa các chip trạng thái. */
.icon-danger {
  display: grid;
  width: 44px;
  min-width: 44px;
  height: 44px;
  place-items: center;
  padding: 0;
  border-color: transparent;
  color: var(--danger);
  background: transparent;
  box-shadow: none;
}

.icon-danger .lucide-icon { width: 19px; height: 19px; }

.icon-danger:hover { color: #fff; background: var(--danger); box-shadow: none; }

/* Nút bọc QR ở header: trước đây onclick nằm trực tiếp trên <img>, bàn phím
   không tới được. */
.qr-toggle {
  display: grid;
  width: 44px;
  min-width: 44px;
  height: 44px;
  place-items: center;
  padding: 0;
  border-color: transparent;
  background: transparent;
  box-shadow: none;
}

.qr-toggle:hover { background: transparent; box-shadow: none; }
.form-error {
  padding: 0.7rem 0.85rem;
  border: 1px solid #f0b6ae;
  border-radius: 12px;
  color: var(--danger);
  background: #fdecea;
  font-size: 0.88rem;
  font-weight: 700;
}

/* Bảng giải thích số tiền: không có nó thì "Bạn cần trả X" là con số không ai
   kiểm chứng được. */
.breakdown {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}

.breakdown > summary {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0.8rem 1rem;
  color: var(--accent-dark);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.breakdown > summary::-webkit-details-marker { display: none; }
.breakdown-sums {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 0.9rem 1rem;
  border-top: 1px solid var(--line);
  background: #fffaf4;
}

.breakdown-sums > div { display: flex; justify-content: space-between; gap: 0.75rem; }
.breakdown-sums dt { color: var(--muted); font-size: 0.86rem; font-weight: 700; }
.breakdown-sums dd { margin: 0; font-weight: 800; }
.breakdown-net { padding-top: 0.35rem; border-top: 1px dashed var(--line); }
.breakdown-net dd.positive { color: var(--green); }
.breakdown-net dd.negative { color: var(--danger); }
.breakdown-lines { display: grid; padding: 0; list-style: none; }

.breakdown-lines > li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.1rem 0.7rem;
  padding: 0.75rem 1rem;
  border-top: 1px dashed var(--line);
}

.breakdown-lines > li > small { grid-column: 1; color: var(--muted); font-size: 0.78rem; }
/* Cột phải phải chỉ định rõ: không có grid-column thì auto-placement nhét số
   tiền vào cột 1 và đẩy tên món sang phải. */
.breakdown-lines > li > strong {
  grid-row: 1 / span 2;
  grid-column: 2;
  align-self: center;
  text-align: right;
  white-space: nowrap;
}
.breakdown-lines > li.is-unclaimed { background: #fffdf0; box-shadow: inset 3px 0 0 #e0b640; }
.breakdown-lines > li.is-unclaimed > small { color: #6b4c05; font-weight: 700; }
.breakdown-what { overflow: hidden; font-weight: 700; text-overflow: ellipsis; }
.transfer-card.is-paid { opacity: 0.78; }