:root {
  --field: #E4E9F0;      /* page background, cool slate */
  --paper: #FFFFFF;      /* the receipt slip and surfaces */
  --ink: #1C2740;        /* text, navy ink */
  --muted: #5A6478;      /* secondary text */
  --rule: #C9D1DC;       /* dashed rules and hairlines */
  --stamp: #23704F;      /* primary action, "approved" stamp green */
  --stamp-ink: #FFFFFF;
  --alert-bg: #FBEAEA;
  --alert-ink: #8A1F1F;
  --focus: #2F5BEA;
  --font: "Atkinson Hyperlegible Next", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Atkinson Hyperlegible Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --field: #10151F; --paper: #1B2232; --ink: #E7EBF3; --muted: #A2ABBD;
    --rule: #364055; --stamp: #3FA578; --stamp-ink: #0B1A13;
    --alert-bg: #3A1D1F; --alert-ink: #F5B5B5; --focus: #8AA6FF;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: var(--field); }
body {
  margin: 0; min-height: 100vh; background: var(--field); color: var(--ink);
  font: 400 1.0625rem/1.55 var(--font);
  padding: env(safe-area-inset-top, 0) env(safe-area-inset-right, 0)
           env(safe-area-inset-bottom, 0) env(safe-area-inset-left, 0);
}
a { color: inherit; }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
h1 { font-size: 1.75rem; line-height: 1.2; font-weight: 700; margin: 0 0 1rem; letter-spacing: -0.01em; }

/* ---------- sign-in: the receipt slip ---------- */
.login-body { display: grid; place-items: center; padding: 2rem 1.25rem 3rem; }
.login { width: 100%; max-width: 24rem; filter: drop-shadow(0 10px 24px rgb(28 39 64 / 0.14)); }
.slip { position: relative; background: var(--paper); padding: 2rem 1.75rem 1.5rem; border-radius: 6px 6px 0 0; }
.slip::after {           /* torn-tape bottom edge */
  content: ""; position: absolute; left: 0; right: 0; bottom: -10px; height: 10px;
  background: conic-gradient(from -45deg at 50% 100%, var(--paper) 90deg, transparent 0) 0 0 / 14px 10px repeat-x;
}
.slip-org {
  margin: 0; font: 500 0.875rem/1.3 var(--mono); color: var(--muted); letter-spacing: 0.04em;
  text-align: center;
}
.slip h1 {
  text-align: center; font-size: 2.5rem; margin: 0.25rem 0 1rem;
  padding-bottom: 1rem; border-bottom: 2px dashed var(--rule);
}
.slip-lede { margin: 0 0 1.5rem; color: var(--muted); text-align: center; }
.btn-ms {
  display: flex; align-items: center; justify-content: center; gap: 0.75rem;
  min-height: 3.25rem; padding: 0 1rem; border-radius: 6px;
  background: var(--ink); color: var(--paper); font-weight: 500; text-decoration: none;
}
.btn-ms:hover { opacity: 0.92; }
.slip-lines { margin: 1.5rem 0 0; padding-top: 1rem; border-top: 2px dashed var(--rule); font: 400 0.875rem/1.4 var(--mono); }
.slip-lines div { display: flex; justify-content: space-between; gap: 1rem; padding: 0.2rem 0; }
.slip-lines dt { color: var(--muted); }
.slip-lines dd { margin: 0; text-align: right; }
.alert { background: var(--alert-bg); color: var(--alert-ink); padding: 0.75rem 1rem; border-radius: 6px; margin: 0 0 1rem; font-size: 0.9375rem; }

/* ---------- app shell ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.875rem 1.25rem; background: var(--paper); border-bottom: 1px solid var(--rule);
}
.brand { font-weight: 700; text-decoration: none; white-space: nowrap; }
.brand span { font-weight: 400; color: var(--muted); }
.who { display: flex; align-items: center; gap: 1rem; font-size: 0.9375rem; }
.who-name { color: var(--muted); }
.page { max-width: 34rem; margin: 0 auto; padding: 1.75rem 1.25rem 3rem; }
@media (max-width: 30rem) { .who-name { display: none; } }

/* ---------- home ---------- */
.hello { font-size: 1.5rem; font-weight: 500; margin-bottom: 1.25rem; }
.capture {
  display: flex; align-items: center; gap: 1.125rem; padding: 1.5rem 1.375rem;
  background: var(--stamp); color: var(--stamp-ink); text-decoration: none; border-radius: 10px;
}
.capture:active { transform: scale(0.99); }
.capture-icon { flex: none; }
.capture-text { display: grid; gap: 0.125rem; }
.capture-text strong { font-size: 1.375rem; line-height: 1.2; font-weight: 700; }
.capture-text span { opacity: 0.88; font-size: 0.9375rem; }
.manual { display: block; margin: 0.875rem 0 2rem; padding: 0.25rem 0; color: var(--ink); font-size: 0.9375rem; text-underline-offset: 3px; }

.menu { background: var(--paper); border-radius: 10px; }
.menu a { display: grid; gap: 0.125rem; padding: 1rem 1.25rem; text-decoration: none; }
.menu a + a { border-top: 1px solid var(--rule); }
.menu a:hover strong { text-decoration: underline; text-underline-offset: 3px; }
.menu strong { font-weight: 500; }
.menu span { color: var(--muted); font-size: 0.9375rem; }

/* ---------- placeholder / error ---------- */
.note { color: var(--muted); }
.back { font-weight: 500; text-underline-offset: 3px; }

@media (prefers-reduced-motion: reduce) { .capture:active { transform: none; } }

/* ---------- shared controls ---------- */
h2 { font-size: 1.0625rem; font-weight: 700; margin: 0 0 0.5rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: 0 1.25rem;
  border-radius: 6px; border: 1px solid var(--rule); background: var(--paper); color: var(--ink);
  font: inherit; font-weight: 500; text-decoration: none; cursor: pointer; white-space: nowrap;
}
.btn-primary { background: var(--stamp); border-color: var(--stamp); color: var(--stamp-ink); width: 100%; }
.btn-small { min-height: 2.5rem; padding: 0 1rem; font-size: 0.9375rem; }
.btn:disabled { opacity: 0.6; cursor: default; }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible,
.pick:focus-within { outline: 3px solid var(--focus); outline-offset: 2px; }
.btn-link { background: none; border: 0; padding: 0; font: inherit; color: var(--ink); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.btn-link.danger { color: var(--alert-ink); }
.flash { padding: 0.75rem 1rem; border-radius: 6px; margin: 0 0 1.25rem; background: var(--paper); border-left: 4px solid var(--stamp); }
.flash-error { background: var(--alert-bg); color: var(--alert-ink); border-left-color: var(--alert-ink); }
.flash-info { border-left-color: var(--focus); }

/* ---------- upload ---------- */
.upload-choices { display: grid; gap: 0.75rem; }
.pick {
  display: flex; align-items: center; gap: 1rem; padding: 1.25rem; border-radius: 10px; cursor: pointer;
  background: var(--paper); border: 2px dashed var(--rule); font-weight: 500;
}
.pick:hover { border-color: var(--stamp); }
.pick-camera { background: var(--stamp); color: var(--stamp-ink); border: 2px solid var(--stamp); }
@media (pointer: fine) { .pick-camera { display: none; } }
.busy { display: flex; align-items: center; gap: 1rem; padding: 1.25rem; background: var(--paper); border-radius: 10px; }
.busy p { margin: 0; }
.busy[hidden], .upload-choices[hidden] { display: none; }
.spinner { width: 1.5rem; height: 1.5rem; border-radius: 50%; border: 3px solid var(--rule); border-top-color: var(--stamp); animation: spin 0.9s linear infinite; flex: none; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 3s; } }

/* ---------- expense form ---------- */
.receipt-preview { margin: 0 0 1.5rem; background: var(--paper); border-radius: 10px; padding: 0.75rem; }
.receipt-preview img { display: block; max-width: 100%; max-height: 22rem; margin: 0 auto; border-radius: 4px; }
.file-link { display: block; padding: 0.5rem; font-weight: 500; text-underline-offset: 3px; word-break: break-all; }
.expense-form fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.field { margin-bottom: 1.125rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.875rem; }
.field label { display: block; font-weight: 500; margin-bottom: 0.375rem; }
.optional { font-weight: 400; color: var(--muted); font-size: 0.875rem; }
.field input, .field select, .field textarea {
  width: 100%; min-height: 3rem; padding: 0.625rem 0.75rem; border-radius: 6px;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink); font: inherit;
}
.field textarea { min-height: 4.5rem; resize: vertical; }
.field [aria-invalid="true"] { border-color: var(--alert-ink); border-width: 2px; }
.field-error { color: var(--alert-ink); margin: 0.375rem 0 0; font-size: 0.9375rem; }
.money-input { position: relative; }
.money-input span { position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%); color: var(--muted); }
.money-input input { padding-left: 1.6rem; font-family: var(--mono); }
.secondary-actions { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 1.5rem; flex-wrap: wrap; }

/* ---------- my expenses ---------- */
.list-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1.25rem; }
.list-head h1 { margin: 0; }
.group { margin-bottom: 2rem; }
.rows { list-style: none; margin: 0; padding: 0; background: var(--paper); border-radius: 10px; }
.rows li + li { border-top: 1px solid var(--rule); }
.rows a { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 0.875rem 1.125rem; text-decoration: none; }
.row-main { display: grid; gap: 0.125rem; min-width: 0; }
.row-main strong { font-weight: 500; overflow-wrap: anywhere; }
.row-main span { color: var(--muted); font-size: 0.9375rem; }
.row-side { flex: none; font-weight: 500; }
.amount { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.total { display: flex; justify-content: space-between; padding: 0.875rem 1.125rem 0; margin: 0; font-weight: 700; border-top: 2px dashed var(--rule); margin-top: 0.75rem; }
.empty { background: var(--paper); border-radius: 10px; padding: 1.25rem; margin: 0; color: var(--muted); }
.empty a { color: var(--ink); font-weight: 500; }