:root {
  --bg: #f3f2ee;
  --bg-elevated: #fbfaf8;
  --ink: #17171a;
  --ink-soft: #6b6a67;
  --ink-faint: #a5a39d;
  --line: rgba(23, 23, 26, 0.07);
  --shell-bg: rgba(23, 23, 26, 0.03);
  --core-bg: #ffffff;
  --accent: #2f6f4f;
  --accent-soft: #e6efe8;
  --danger: #b1503f;
  --danger-soft: #f5e8e5;
  --owed: #2f6f4f;
  --owe: #b1503f;
  --radius-outer: 2rem;
  --radius-inner: calc(2rem - 0.5rem);
  --ease: cubic-bezier(0.32, 0.72, 0, 1);
  --shadow-diffuse: 0 40px 80px -40px rgba(23, 23, 26, 0.18), 0 2px 6px rgba(23, 23, 26, 0.04);
  --shadow-tight: 0 12px 28px -16px rgba(23, 23, 26, 0.16);
}

* { box-sizing: border-box; }

.hidden { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    radial-gradient(circle at 12% 8%, rgba(47, 111, 79, 0.06), transparent 40%),
    radial-gradient(circle at 88% 92%, rgba(177, 80, 63, 0.05), transparent 45%);
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3, .brand-name {
  font-family: "Clash Display", "Plus Jakarta Sans", sans-serif;
  letter-spacing: -0.02em;
  margin: 0;
}

/* ---------- topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1rem, 4vw, 3rem) 1rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: linear-gradient(to bottom, rgba(243, 242, 238, 0.92), rgba(243, 242, 238, 0.6));
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 0.5rem; }
.brand-mark { color: var(--accent); font-size: 1.1rem; }
.brand-name { font-size: 1.15rem; font-weight: 600; }

.island-nav {
  display: flex;
  gap: 0.25rem;
  background: var(--core-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem;
  box-shadow: var(--shadow-tight);
  overflow-x: auto;
  max-width: 100%;
}

.island-btn {
  border: none;
  background: transparent;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}
.island-btn.is-active { background: var(--ink); color: #fff; }
.island-btn:not(.is-active):hover { background: var(--shell-bg); color: var(--ink); }

.month-switcher {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 600;
  font-size: 0.9rem;
  background: var(--core-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.5rem 0.4rem 0.9rem;
  box-shadow: var(--shadow-tight);
}
.month-switcher button {
  border: none;
  background: var(--shell-bg);
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--ink);
  transition: transform 0.4s var(--ease), background 0.4s var(--ease);
}
.month-switcher button:hover { background: var(--ink); color: #fff; transform: scale(1.06); }
.month-switcher button:active { transform: scale(0.96); }
#monthLabel { min-width: 7.5rem; text-align: center; }

/* ---------- main / panels ---------- */

.app-main {
  padding: 1rem clamp(1rem, 4vw, 3rem) 8rem;
  max-width: 1200px;
  margin: 0 auto;
}

.tab-panel { display: none; }
.tab-panel.is-active { display: block; animation: panelIn 0.6s var(--ease); }
@keyframes panelIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.eyebrow {
  display: inline-block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-faint);
  background: var(--shell-bg);
  border: 1px solid var(--line);
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  margin: 1.5rem 0 0.75rem;
}

.page-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 600;
  margin-bottom: 2rem;
}

/* ---------- bento / double-bezel ---------- */

.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.25rem;
}

.shell {
  background: var(--shell-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-outer);
  padding: 0.5rem;
}
.shell.narrow { max-width: 32rem; }

.core {
  background: var(--core-bg);
  border-radius: var(--radius-inner);
  padding: 1.75rem;
  height: 100%;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.6), var(--shadow-diffuse);
}
.core-flat { box-shadow: inset 0 1px 1px rgba(255,255,255,0.6); padding: 0.5rem 1.75rem; }

.cell.span-4 { grid-column: span 4; }
.cell.span-6 { grid-column: span 6; }
.cell.span-8 { grid-column: span 8; }
.cell.span-12 { grid-column: span 12; }
.cell.row-2 { grid-row: span 2; }

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  filter: blur(6px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease), filter 0.9s var(--ease);
}
[data-reveal].in-view { opacity: 1; transform: translateY(0); filter: blur(0); }

.core-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}
.core-label-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.5rem; }

.core-hero .hero-amount {
  font-family: "Clash Display", sans-serif;
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 600;
  line-height: 1;
  margin-bottom: 1.5rem;
}
.currency { color: var(--ink-faint); font-size: 0.55em; margin-right: 0.2rem; font-weight: 500; }

.core-amount {
  font-family: "Clash Display", sans-serif;
  font-size: 2rem;
  font-weight: 600;
}
.core-amount.owed-to-me { color: var(--owed); }
.core-amount.i-owe { color: var(--owe); }
.core-sub { font-size: 0.8rem; color: var(--ink-faint); margin-top: 0.4rem; }

.budget-track {
  height: 0.5rem;
  border-radius: 999px;
  background: var(--shell-bg);
  overflow: hidden;
}
.budget-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #4a9a71);
  border-radius: 999px;
  transition: width 1s var(--ease), background 0.5s var(--ease);
}
.budget-fill.over { background: linear-gradient(90deg, var(--danger), #d17a68); }
.budget-caption { font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.75rem; }

.net-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.net-row strong { color: var(--ink); font-weight: 600; }
.net-value { font-weight: 700; font-variant-numeric: tabular-nums; }
.net-value.positive { color: var(--owed); }
.net-value.negative { color: var(--owe); }

/* category chart */
.category-chart { display: flex; flex-direction: column; gap: 0.85rem; }
.cat-row { display: grid; grid-template-columns: 6.5rem 1fr auto; align-items: center; gap: 0.75rem; }
.cat-name { font-size: 0.82rem; color: var(--ink-soft); }
.cat-bar-track { height: 0.55rem; background: var(--shell-bg); border-radius: 999px; overflow: hidden; }
.cat-bar-fill { height: 100%; border-radius: 999px; background: var(--ink); transition: width 0.9s var(--ease); }
.cat-amount { font-size: 0.8rem; font-weight: 600; font-variant-numeric: tabular-nums; }

/* mini lists */
.mini-list { display: flex; flex-direction: column; gap: 0.6rem; }
.mini-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.9rem;
  border-radius: 1rem;
  background: var(--shell-bg);
  transition: background 0.4s var(--ease), transform 0.4s var(--ease);
}
.mini-row:hover { background: var(--accent-soft); transform: translateX(2px); }
.mini-row .mini-main { display: flex; flex-direction: column; gap: 0.1rem; }
.mini-row .mini-title { font-size: 0.88rem; font-weight: 600; }
.mini-row .mini-meta { font-size: 0.72rem; color: var(--ink-faint); }
.mini-row .mini-amount { font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }
.mini-row .mini-amount.positive { color: var(--owed); }

.empty { color: var(--ink-faint); font-size: 0.85rem; padding: 1rem 0; }
.inline-note { color: var(--ink-faint); font-size: 0.78rem; }

.text-link {
  border: none; background: none; cursor: pointer; color: var(--ink-soft);
  font-size: 0.8rem; font-weight: 500; transition: color 0.3s var(--ease);
}
.text-link:hover { color: var(--ink); }

/* ---------- transactions table ---------- */

.filter-row { display: flex; gap: 0.75rem; margin-bottom: 1rem; }
.filter-row select {
  border: 1px solid var(--line);
  background: var(--core-bg);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font: inherit;
  font-size: 0.82rem;
  color: var(--ink);
}

.txn-table { width: 100%; border-collapse: collapse; }
.txn-table th {
  text-align: left;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  font-weight: 600;
  padding: 1rem 0.75rem;
  border-bottom: 1px solid var(--line);
}
.txn-table td {
  padding: 0.9rem 0.75rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.86rem;
}
.txn-table tr:last-child td { border-bottom: none; }
.txn-table tr { cursor: pointer; transition: background 0.3s var(--ease); }
.txn-table tr:hover { background: var(--shell-bg); }
.txn-table .num { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.type-pill {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  text-transform: capitalize;
}
.type-pill.expense { background: var(--shell-bg); color: var(--ink-soft); }
.type-pill.subscription { background: #e8ecf5; color: #3a5aa8; }
.type-pill.lent { background: var(--accent-soft); color: var(--owed); }
.type-pill.borrowed { background: var(--danger-soft); color: var(--owe); }
.type-pill.income { background: var(--accent-soft); color: var(--owed); }

/* ---------- card grid (subs / borrows) ---------- */

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr)); gap: 1.1rem; }
.card-grid.single { grid-template-columns: 1fr; }

.item-card {
  background: var(--core-bg);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  padding: 1.4rem;
  box-shadow: var(--shadow-tight);
  cursor: pointer;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.item-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-diffuse); }
.item-card .item-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.5rem; }
.item-card .item-name { font-weight: 600; font-size: 1rem; }
.item-card .item-amount { font-family: "Clash Display", sans-serif; font-size: 1.5rem; font-weight: 600; margin-top: 0.6rem; }
.item-card .item-amount.positive { color: var(--owed); }
.unit-label { font-size: 0.5em; color: var(--ink-faint); font-family: "Plus Jakarta Sans", sans-serif; font-weight: 500; }
.item-card .item-meta { font-size: 0.75rem; color: var(--ink-faint); margin-top: 0.3rem; }
.item-card .item-actions { margin-top: 1rem; display: flex; gap: 0.5rem; }

.subhead {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 1.05rem; font-weight: 600; margin: 1rem 0 1rem;
}
.split-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }

.badge-status {
  font-size: 0.66rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
  padding: 0.2rem 0.55rem; border-radius: 999px;
}
.badge-status.pending { background: var(--danger-soft); color: var(--owe); }
.badge-status.settled { background: var(--accent-soft); color: var(--owed); }
.badge-status.active { background: #e8ecf5; color: #3a5aa8; }
.badge-status.cancelled { background: var(--shell-bg); color: var(--ink-faint); }

/* ---------- buttons ---------- */

.btn-primary {
  border: none;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: transform 0.4s var(--ease), background 0.4s var(--ease);
}
.btn-primary:hover { background: var(--accent); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--danger);
  padding: 0.75rem 1.3rem;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.4s var(--ease);
}
.btn-ghost:hover { background: var(--danger-soft); }

.icon-btn {
  border: none;
  background: var(--shell-bg);
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}
.icon-btn:hover { background: var(--line); transform: rotate(90deg); }

/* floating action button */
.fab {
  position: fixed;
  right: clamp(1rem, 4vw, 3rem);
  bottom: clamp(1rem, 4vw, 2.5rem);
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border: none;
  background: var(--ink);
  color: #fff;
  padding: 0.4rem 1.4rem 0.4rem 0.4rem;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow-diffuse);
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  transition: transform 0.5s var(--ease), background 0.5s var(--ease);
}
.fab:hover { background: var(--accent); }
.fab:active { transform: scale(0.97); }
.fab-icon {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  display: grid;
  place-items: center;
  transition: transform 0.5s var(--ease);
}
.fab:hover .fab-icon { transform: translate(1px, -1px) scale(1.06) rotate(90deg); }

/* ---------- modal ---------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(23, 23, 26, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--ease);
}
.modal-backdrop.is-open { opacity: 1; pointer-events: auto; }
@media (min-width: 640px) { .modal-backdrop { align-items: center; } }

.modal-shell {
  width: 100%;
  max-width: 30rem;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--shell-bg);
  border: 1px solid var(--line);
  border-radius: 1.75rem 1.75rem 0 0;
  padding: 0.5rem;
  transform: translateY(40px);
  transition: transform 0.5s var(--ease);
}
.modal-backdrop.is-open .modal-shell { transform: translateY(0); }
@media (min-width: 640px) { .modal-shell { border-radius: var(--radius-outer); } }

.modal-core {
  background: var(--core-bg);
  border-radius: 1.5rem;
  padding: 1.75rem;
}
@media (min-width: 640px) { .modal-core { border-radius: var(--radius-inner); } }

.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.25rem; }
.modal-head h3 { font-size: 1.3rem; }

.type-select { display: flex; gap: 0.4rem; margin-bottom: 1.25rem; background: var(--shell-bg); padding: 0.3rem; border-radius: 999px; }
.type-select button {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.55rem 0.4rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}
.type-select button.is-active { background: var(--ink); color: #fff; }

#txnForm label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}
#txnForm .optional { font-weight: 400; color: var(--ink-faint); text-transform: none; letter-spacing: 0; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }

#txnForm label.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: auto;
  padding-bottom: 0.75rem;
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
  width: 1.15rem;
  height: 1.15rem;
  margin: 0;
  accent-color: var(--ink);
  cursor: pointer;
}

#txnForm input:not([type="checkbox"]), #txnForm select, #txnForm textarea {
  width: 100%;
  margin-top: 0.4rem;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  border-radius: 0.85rem;
  padding: 0.7rem 0.85rem;
  font: inherit;
  font-size: 0.9rem;
  color: var(--ink);
  transition: border-color 0.3s var(--ease);
}
#txnForm input:focus, #txnForm select:focus, #txnForm textarea:focus {
  outline: none;
  border-color: var(--ink);
}
#txnForm textarea { resize: vertical; }

.modal-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 0.5rem; gap: 1rem; }

/* budget panel */
.budget-input-row { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.5rem; }
.currency-prefix { font-weight: 600; color: var(--ink-faint); font-family: "Clash Display", sans-serif; font-size: 1.3rem; }
#budgetInput {
  flex: 1;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  border-radius: 0.85rem;
  padding: 0.75rem 0.9rem;
  font: inherit;
  font-size: 1.1rem;
  font-family: "Clash Display", sans-serif;
}
.hint { font-size: 0.8rem; color: var(--ink-faint); margin-top: 1.25rem; line-height: 1.6; }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .cell.span-4, .cell.span-6, .cell.span-8, .cell.span-12 { grid-column: span 12; }
  .cell.row-2 { grid-row: auto; }
  .split-cols { grid-template-columns: 1fr; gap: 2.5rem; }
  .topbar { justify-content: center; }
  .month-switcher { order: 3; width: 100%; justify-content: center; }
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .fab-label { display: none; }
  .fab { padding: 0.5rem; }
}

/* ---------- login ---------- */

.login-shell {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.login-card { width: 100%; max-width: 26rem; }
.login-card .core { padding: 2.25rem; }

.login-brand { margin-bottom: 2rem; }
.login-brand .brand-name { font-size: 1.3rem; }

.login-title { font-size: 2.2rem; margin-bottom: 1.75rem; }

#loginForm label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 1.1rem;
}
#loginForm input {
  width: 100%;
  margin-top: 0.4rem;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  border-radius: 0.85rem;
  padding: 0.75rem 0.9rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  transition: border-color 0.3s var(--ease);
}
#loginForm input:focus { outline: none; border-color: var(--ink); }

.login-error {
  font-size: 0.82rem;
  color: var(--owe);
  background: var(--danger-soft);
  border-radius: 0.75rem;
  padding: 0.7rem 0.9rem;
  margin-bottom: 1.1rem;
}

.login-submit { width: 100%; margin-top: 0.5rem; }
.login-submit:disabled { opacity: 0.6; cursor: default; }