:root {
  --paper: #F7F3E8;
  --paper-dim: #EFE8D6;
  --ink: #2B2118;
  --ink-soft: #6B5D4D;
  --rule: black;
  --brass: #B08D57;
  --stamp-green: #3B6C4E;
  --stamp-rust: #A6432D;
  --stamp-amber: #A9752B;
  --radius: 3px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper-dim);
  background-image: linear-gradient(var(--rule) 0.1px, transparent 0.5px);
  color: var(--ink);
  background-size: 100% 2.2rem;
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* Masthead */
.masthead {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.masthead__mark {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.masthead h1 {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: 2rem;
  margin: 0;
  letter-spacing: -0.01em;
}
.masthead__sub {
  margin: 0.15rem 0 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

/* Ledger card */
.ledger {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  box-shadow: 0 1px 0 rgba(43,33,24,0.05), 0 12px 30px -18px rgba(43,33,24,0.35);
  display: grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  overflow: hidden;
}
.ledger::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--rule) 0 6px, transparent 6px 12px);
}

.ledger__entry, .ledger__result {
  padding: 2rem 2rem 2.25rem;
}

.entry-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.65rem;
  margin-bottom: 1.4rem;
}
.entry-head__label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--brass);
  text-transform: uppercase;
}
.entry-head__title {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: 1.15rem;
}

/* Form */
.field-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.85rem;
}
.field-row label {
  font-size: 0.88rem;
  color: var(--ink-soft);
  flex: 1;
}
.field-input {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--ink);
  min-width: 150px;
}
.field-input span {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ink-soft);
  padding-right: 0.3rem;
  font-size: 0.9rem;
}
.field-input input, select {
  border: none;
  background: transparent;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.95rem;
  color: var(--ink);
  padding: 0.35rem 0.1rem;
  width: 100%;
  outline: none;
}
select {
  border-bottom: 1px solid var(--ink);
  min-width: 150px;
  cursor: pointer;
}
input::placeholder {
  opacity: 0.7;
}

.divider {
  border-top: 1px dashed var(--rule);
  margin: 1.4rem 0 1.2rem;
}

.check {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--ink);
}
.check input { accent-color: var(--brass); width: 16px; height: 16px; }

.roommates-block { margin-top: 1rem; }
.hidden { display: none !important; }

.roommate-rows { margin: 0.6rem 0; }
.roommate-row {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.6rem;
}
.roommate-row input[type="text"],
.roommate-row input[type="number"] {
  border: none;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.9rem;
  padding: 0.3rem 0.1rem;
  outline: none;
}
.roommate-row input[type="text"] { flex: 1.3; }
.roommate-row input[type="number"] { flex: 1; }
.roommate-row .remove-row {
  background: none;
  border: none;
  color: var(--stamp-rust);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0.2rem 0.3rem;
}

.btn-ghost {
  display: inline-block;
  background: none;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

.btn-stamp-action {
  margin-top: 1.6rem;
  width: 100%;
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 0.85rem 1rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn-stamp-action:hover { background: var(--stamp-amber); }
.btn-stamp-action:disabled { opacity: 0.6; cursor: wait; }

/* Results side */
.empty-state {
  color: var(--ink-soft);
  font-size: 0.92rem;
  padding: 2.5rem 0.5rem;
  text-align: center;
  border: 1px dashed var(--rule);
  border-radius: 4px;
}

.error-box {
  background: #FBEAE4;
  color: var(--stamp-rust);
  border: 1px solid var(--stamp-rust);
  border-radius: 4px;
  padding: 0.8rem 1rem;
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.result { animation: fade-in 0.35s ease; }
@keyframes fade-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

.stamp-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 1.6rem;
}
.stamp {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  border: 3px double currentColor;
  border-radius: 50%;
  width: 128px;
  height: 128px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transform: rotate(-8deg);
  padding: 0.5rem;
  color: var(--stamp-green);
  animation: stamp-down 0.28s ease;
}
.stamp.moderate { color: var(--stamp-amber); }
.stamp.expensive { color: var(--stamp-rust); }
@keyframes stamp-down {
  0% { transform: rotate(-8deg) scale(1.6); opacity: 0; }
  60% { opacity: 1; }
  100% { transform: rotate(-8deg) scale(1); opacity: 1; }
}

.ledger-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.2rem;
}
.ledger-table td {
  padding: 0.55rem 0.1rem;
  border-bottom: 1px solid var(--rule);
  font-size: 0.9rem;
}
.ledger-table td.num {
  text-align: right;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
}
.ledger-table tr:last-child td { border-bottom: none; }

.ledger-table thead th {
  text-align: left;
  padding: 0.4rem 0.1rem 0.6rem;
  border-bottom: 2px solid var(--ink);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
.ledger-table thead th.num { text-align: right; }

.tip {
  font-size: 0.85rem;
  color: var(--ink-soft);
  border-left: 2px solid var(--brass);
  padding-left: 0.7rem;
  margin: 0 0 1.2rem;
}

.split-section h3 {
  font-family: 'Fraunces', serif;
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.6rem;
}

.autosave-note {
  font-size: 0.78rem;
  color: var(--stamp-green);
  margin: 0.4rem 0 0;
}

.actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 1.2rem;
}



@media (max-width: 780px) {
  .ledger { grid-template-columns: 1fr; }
  .ledger::before { display: none; }
  .ledger__entry { border-bottom: 1px dashed var(--rule); }
}

/* Expense breakdown */
.expense-breakdown {
  max-width: 100%;
  margin: 1.5rem auto 0;
  padding: 0 1.5rem;
}
.expense-breakdown__inner {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  box-shadow: 0 1px 0 rgba(43,33,24,0.05), 0 12px 30px -18px rgba(43,33,24,0.35);
  padding: 1.6rem 1.8rem 1.9rem;
  animation: fade-in 0.35s ease;
}
.expense-breakdown .table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.expense-breakdown table.ledger-table {
  min-width: 720px;
  margin-bottom: 0;
}
.footer {
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0.8rem 1.5rem;
  width: 100%;
  background: var(--ink);
  color: var(--paper-dim);
  text-align: center;
  font-size: 0.82rem;
  line-height: 1.4;
}
.footer p {
  margin: 0;
}
@media (max-width: 780px) {
  .expense-breakdown { padding: 0; }
}