:root {
  --primary:       #008f7a;
  --text:          #111827;
  --muted:         #4B5563;
  --border:        #E5E7EB;
  --bg:            #F9FAFB;
  --space:         1rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; font: inherit; }

html {
  color-scheme: light;
  -webkit-text-size-adjust: 100%;
  scrollbar-gutter: stable;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: radial-gradient(ellipse at 60% 0%, #e8faf6 0%, var(--bg) 20%);
  min-block-size: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
}


hr {
  background: var(--border);
  border: none;
  height: 2px;
  margin-top: var(--space);
  margin-bottom: var(--space);
}

main {
  flex: 1;
  max-inline-size: 480px;
  margin-inline: auto;
  padding: var(--space);
  padding-block-end: 3rem;
}

.site-footer {
  text-align: center;
  padding: 0.75rem;
  background: #f3f4f6;
  color: var(--muted);
  font-size: 0.875rem;
}

h1 {
  font-weight: 700;
  line-height: 1.2;
  margin-block-end: var(--space);
}

p { color: var(--muted); }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

h2 { font-weight: 600; color: black; margin-block-start: var(--space); margin-bottom: var(--space); }

/* === Tabs === */
[role="tablist"] {
  display: flex;
  border-block-end: 2px solid var(--border);
  margin-block-end: var(--space);
  overflow: auto hidden;
  scrollbar-width: none;
}
[role="tablist"]::-webkit-scrollbar { display: none; }

[role="tab"] {
  flex-shrink: 0;
  inline-size: auto;
  min-block-size: unset;
  padding: 0.5rem var(--space);
  margin-block-start: 0;
  margin-block-end: -2px;
  background: transparent;
  color: var(--muted);
  border: none;
  border-block-end: 2px solid transparent;
  font-weight: 500;
  white-space: nowrap;
}
[role="tab"]:hover { background: transparent; color: var(--text); }
[role="tab"][aria-selected="true"] { color: var(--primary); border-block-end-color: var(--primary); font-weight: 600; }
[role="tab"]:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; background: transparent; }

[role="tabpanel"] { outline: none; }
[role="tabpanel"]:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* === Buttons === */
button {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 100%;
  padding: 0.5rem var(--space);
  font-weight: 600;
  color: white;
  background: var(--primary);
  border: 1.5px solid transparent;
  cursor: pointer;
  min-block-size: 36px;
  transition: background 0.15s;
  margin-block-start: var(--space);
}
button:active        { opacity: 0.85; }
button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
button:disabled      { opacity: 0.35; cursor: not-allowed; pointer-events: none; }

button.secondary {
  inline-size: auto;
  background: white;
  color: var(--text);
  border-color: var(--border);
  font-weight: 500;
  margin-block-start: 0;
  padding: 0.3125rem 0.625rem;
  min-block-size: unset;
}

button.outline { background: transparent; color: var(--primary); border-color: var(--primary); }

button.small { inline-size: auto; min-block-size: unset; padding: 0.5rem; margin-block-start: 0; font-weight: 400; }

button.danger { background: transparent; color: var(--muted); border-color: transparent; }

.autocomplete { position: relative; }
.autocomplete .suggestions {
  position: absolute;
  inset-inline: 0;
  top: 100%;
  z-index: 10;
  background: white;
  border: 1.5px solid var(--border);
  border-top: none;
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 14rem;
  overflow-y: auto;
}
.autocomplete .suggestions li { padding: 0.5rem; cursor: pointer; }
.autocomplete .suggestions li:hover,
.autocomplete .suggestions li.active { background: var(--bg); }

/* === Inputs === */
input:not([type=checkbox]), select, textarea {
  display: block;
  inline-size: 100%;
  padding: 0.4375rem 0.625rem;
  color: var(--text);
  background: white;
  border: 1.5px solid var(--border);
  min-block-size: 36px;
  margin-block-start: 0.375rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
  -webkit-appearance: none;
}
input:not([type=checkbox]):focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 35%, transparent);
}
input::placeholder, textarea::placeholder { color: var(--muted); }

input[type=number] { appearance: none; -moz-appearance: textfield; }
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; }

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.625rem center;
  padding-inline-end: 2rem;
  cursor: pointer;
}
textarea { resize: vertical; min-block-size: 6rem; }

/* === Fieldset === */
fieldset { border: 1.5px solid var(--border); padding: 0.625rem var(--space); margin-block-start: 0.375rem; }
fieldset.checkboxes { padding-inline: 0; padding-block: 0.25rem; margin-block-start: var(--space); }
legend { color: var(--muted); padding-inline: 0.25rem; }
fieldset.checkboxes > legend { margin-inline-start: var(--space); }

label { display: block; color: var(--muted); margin-block-start: var(--space); }

fieldset.checkboxes label {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.375rem var(--space);
  min-block-size: 36px;
  cursor: pointer;
  color: var(--text);
  margin-block-start: 0;
}
fieldset.checkboxes label:focus-within { color: var(--primary); }

/* === Checkbox === */
input[type=checkbox] {
  appearance: none;
  -webkit-appearance: none;
  flex-shrink: 0;
  inline-size: 1.125rem;
  block-size: 1.125rem;
  border: 1.5px solid var(--border);
  background: white;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
input[type=checkbox]:checked {
  background: var(--primary);
  border-color: var(--primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 0.75rem;
}
input[type=checkbox]:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* === Lists === */
ul { list-style: none; }
li { padding-block: 0.5rem; border-block-end: 1px solid var(--border); line-height: 1.4; }
li:last-child { border-block-end: none; }

/* === Title row === */
.title-row { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; margin-block-end: var(--space); }
.title-row h1 { flex: 1; min-inline-size: 0; margin-block-end: 0; }
.title-actions { display: flex; gap: 0.375rem; }
.title-actions button { margin-block-start: 0; }

.back-btn {
  display: flex;
  align-items: center;
  font-size: clamp(1.375rem, 5vw, 1.75rem);
  font-weight: 300;
  line-height: 1.2;
  color: var(--primary);
  text-decoration: none;
}

/* === Section row (heading + action) === */
.section-row { display: flex; align-items: center; gap: var(--space); }
.section-row h2 { flex: 1; margin-block-start: 0; }
.section-row button { margin-block-start: 0; }

/* === Amount === */
.amount-arrow { display: flex; flex-direction: column; align-items: center; gap: 0.125rem; margin-block: 0.5rem; }
.amount-row { display: flex; align-items: center; gap: 0.375rem; }
.amount-row input { inline-size: 5.5rem; margin-block-start: 0; text-align: center; }
.amount-row span, .flow-arrow { color: var(--muted); }
.flow-arrow { user-select: none; }

/* === Member list (create group) === */
.member-row { display: flex; gap: 0.375rem; align-items: center; margin-block-start: 0.375rem; }
.member-row input { flex: 1; margin-block-start: 0; }
.member-remove { flex-shrink: 0; inline-size: 2.25rem; min-block-size: 2.25rem; padding: 0; margin-block-start: 0; background: white; color: var(--muted); border-color: var(--border); font-weight: 400; }
.member-remove:hover:not(:disabled) { border-color: #EF4444; color: #EF4444; }
#members-fieldset #add-member-btn { inline-size: 100%; margin-block-start: var(--space); }

/* === Grids === */
li.member-stat-item { display: grid; grid-template-columns: 1fr auto auto; align-items: center; column-gap: var(--space); }
.positive { color: #16a34a; font-weight: 500; }
.negative { color: #dc2626; font-weight: 500; }

li.spending-item { display: grid; grid-template-columns: 1fr auto auto; align-items: center; column-gap: 0.5rem; row-gap: 0.125rem; }
.spending-desc { font-weight: 500; }
.spending-amount { white-space: nowrap; }
.spending-meta { grid-column: 1 / -1; color: var(--muted); }
.spending-delete { display: flex; }

/* === QR === */
#qr { display: inline-block; padding: 0.625rem; background: white; border: 1.5px solid var(--border); margin-block: var(--space); }

/* === Footer === */
footer { margin-block-start: 2rem; padding-block-start: var(--space); border-top: 1px solid var(--border); }

/* === Audit log === */
.log-item { line-height: 1.4; }
.log-action { font-weight: 500; }
.log-meta { display: block; color: var(--muted); }

/* === My groups === */
#my-groups { margin-block-end: 1.5rem; }
#my-groups-list li { display: flex; align-items: center; gap: 0.375rem; }
#my-groups-list a { flex: 1; }

/* === Toast === */
#toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: white;
  padding: 0.5rem 1rem;
  font-weight: 500;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s;
}
#toast.visible { opacity: 1; }