:root {
  --bg: #F1EEE3;
  --surface: #FBFAF5;
  --ink: #2B2A24;
  --ink-soft: #6B6A5E;
  --line: #DEDACB;
  --a: #A63A38;       /* puolukka — vanhempi A */
  --a-soft: #F3DEDA;
  --b: #3C4B6B;        /* mustikka — vanhempi B */
  --b-soft: #DEE3EC;
  --child: #6F7D52;    /* koivu/sammal — lapsi, jaettu */
  --amber: #B9822E;    /* pihka — selvitetty */
  --radius: 14px;
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Public Sans', system-ui, sans-serif;
  font-feature-settings: 'tnum' 1;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display {
  font-family: 'Literata', Georgia, serif;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
}

button, input, select { font-family: inherit; }

/* ---------- Login ---------- */

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  max-width: 380px;
  width: 100%;
  text-align: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--child);
  font-weight: 600;
  margin: 0 0 18px;
}

.login-card h1 {
  font-size: 2.1rem;
  line-height: 1.15;
  margin-bottom: 16px;
}

.login-copy {
  color: var(--ink-soft);
  margin: 0 0 28px;
  line-height: 1.5;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}

.auth-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.auth-form input {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
}

.register-details {
  margin-top: 22px;
  text-align: left;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.register-details summary {
  cursor: pointer;
  text-align: center;
  color: var(--child);
  font-weight: 600;
  margin-bottom: 14px;
}

.register-details .auth-form { margin-top: 6px; }

.login-error {
  color: var(--a);
  margin-top: 16px;
  font-size: 0.9rem;
}

/* ---------- App shell ---------- */

.app { min-height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 5;
}

.topbar-title {
  font-family: 'Literata', serif;
  font-weight: 600;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.child-tabs {
  display: flex;
  gap: 6px;
  flex: 1;
  overflow-x: auto;
}

.child-tab {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}

.child-tab.active {
  background: var(--child);
  border-color: var(--child);
  color: #fff;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.me-name {
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 14px;
  color: var(--ink);
  cursor: pointer;
  font-size: 0.88rem;
}
.btn-ghost:hover { border-color: var(--ink-soft); }

.btn-primary {
  background: var(--child);
  border: 1px solid var(--child);
  border-radius: 8px;
  padding: 9px 18px;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
}
.btn-primary:hover { filter: brightness(0.94); }

.main {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 24px 120px;
}

.empty-state {
  color: var(--ink-soft);
  text-align: center;
  margin-top: 80px;
}

/* ---------- Settlement summary ---------- */

.settlement-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 26px;
  margin-bottom: 40px;
}

.settlement-card h2 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.settlement-range {
  color: var(--ink-soft);
  font-size: 0.85rem;
  margin: 0 0 18px;
}

.settlement-sides {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
}

.side {
  text-align: center;
}
.side.side-a { color: var(--a); }
.side.side-b { color: var(--b); }

.side-name {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-bottom: 4px;
}

.side-amount {
  font-family: 'Literata', serif;
  font-size: 1.6rem;
  font-weight: 500;
}

.side-sub { font-size: 0.78rem; color: var(--ink-soft); margin-top: 2px; }

.settlement-divider {
  width: 1px;
  align-self: stretch;
  background: var(--line);
}

.transfer-line {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.transfer-text { font-size: 0.95rem; }
.transfer-text strong { font-family: 'Literata', serif; }

.child-income-note {
  font-size: 0.8rem;
  color: var(--child);
  margin-top: 8px;
}

/* ---------- The spine (signature element) ---------- */

.spine-wrap { position: relative; }

.spine-heading {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-bottom: 10px;
}
.spine-heading .a { color: var(--a); }
.spine-heading .b { color: var(--b); }

.spine {
  position: relative;
  padding: 4px 0;
}

.spine::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
  transform: translateX(-50%);
}

.spine-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 26px 1fr;
  align-items: center;
  min-height: 46px;
}

.spine-node {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--line);
  justify-self: center;
  z-index: 1;
}

.spine-entry {
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 0.88rem;
  max-width: 300px;
  position: relative;
}

.spine-entry .amount { font-weight: 700; }
.spine-entry .desc { color: var(--ink-soft); }
.spine-entry .date { display: block; font-size: 0.72rem; color: var(--ink-soft); margin-top: 1px; }

.spine-entry.side-a {
  justify-self: end;
  background: var(--a-soft);
  color: var(--a);
  border-top-right-radius: 2px;
}
.spine-entry.side-b {
  justify-self: start;
  background: var(--b-soft);
  color: var(--b);
  border-top-left-radius: 2px;
}
.spine-entry .desc, .spine-entry .date { color: inherit; opacity: 0.72; }

.spine-node.ring {
  width: 22px;
  height: 22px;
  background: var(--amber);
  border-color: var(--amber);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--amber) 20%, transparent);
}

.spine-row.settled-marker {
  min-height: 30px;
}
.settled-label {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.72rem;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* ---------- Quick add ---------- */

.quick-add-btn {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--child);
  color: #fff;
  border: none;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  box-shadow: 0 8px 24px -8px rgba(43, 42, 36, 0.4);
  cursor: pointer;
  z-index: 6;
}
.quick-add-btn:hover { filter: brightness(0.95); }

/* ---------- Dialogs ---------- */

.sheet {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  background: var(--surface);
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.35);
  width: 100%;
  max-width: 380px;
}
.sheet::backdrop { background: rgba(43, 42, 36, 0.45); }

.sheet-form {
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sheet-form h2 { font-size: 1.2rem; }
.sheet-hint { font-size: 0.82rem; color: var(--ink-soft); margin: -6px 0 4px; }

.sheet-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.sheet-form input, .sheet-form select {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
}
.sheet-form input:focus, .sheet-form select:focus,
button:focus-visible, .child-tab:focus-visible {
  outline: 2px solid var(--child);
  outline-offset: 2px;
}

.sheet-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

@media (max-width: 600px) {
  .topbar { flex-wrap: wrap; }
  .settlement-sides { grid-template-columns: 1fr; }
  .settlement-divider { display: none; }
  .spine-entry { max-width: none; }
}