:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #17202a;
  --muted: #667085;
  --line: #d9e0e7;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --spending: #2563eb;
  --saving: #15803d;
  --giving: #7c3aed;
  --danger: #b42318;
  --warning: #b54708;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

.app-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

.brand-mark,
.login-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
}

.nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.nav-actions form {
  margin: 0;
}

.nav-link {
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
}

.app-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: clamp(1rem, 4vw, 2rem);
}

.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.page-heading h1,
.login-card h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 0.25rem;
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.quick-form,
.split-form,
.request-form {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.quick-form input {
  grid-column: span 9;
}

.quick-form button {
  grid-column: span 3;
}

.children-grid,
.workspace-grid,
.balance-grid,
.request-board,
.summary-list {
  display: grid;
  gap: 1rem;
}

.children-grid {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.workspace-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.balance-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-bottom: 1rem;
}

.child-card,
.tool-panel,
.balance-tile,
.request-card,
.summary-row,
.empty-state,
.login-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.child-card {
  position: relative;
  overflow: hidden;
  padding: 1rem;
}

.child-card-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.child-card h2,
.tool-panel h2,
.request-card h2,
.summary-row h2 {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.child-card p,
.muted {
  margin: 0;
  color: var(--muted);
}

.profile-placeholder {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  font-size: 1.4rem;
  font-weight: 800;
}

.profile-placeholder.has-avatar {
  background-size: cover;
  background-position: center;
  color: transparent;
  border: 2px solid rgba(255, 255, 255, 0.9);
}

.thumb {
  color: #ffffff;
  background-size: 160% 160%;
}

.thumb-1 { background-image: linear-gradient(135deg, #2563eb, #14b8a6); }
.thumb-2 { background-image: linear-gradient(135deg, #7c3aed, #06b6d4); }
.thumb-3 { background-image: linear-gradient(135deg, #15803d, #eab308); }
.thumb-4 { background-image: linear-gradient(135deg, #dc2626, #f59e0b); }
.thumb-5 { background-image: linear-gradient(135deg, #0f766e, #65a30d); }
.thumb-6 { background-image: linear-gradient(135deg, #1d4ed8, #9333ea); }
.thumb-7 { background-image: linear-gradient(135deg, #be123c, #ea580c); }
.thumb-8 { background-image: linear-gradient(135deg, #0369a1, #059669); }

.card-watermark {
  position: absolute;
  inset: auto -2rem -2rem auto;
  width: 11rem;
  height: 11rem;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  border-radius: 50%;
  filter: grayscale(100%);
  opacity: 0.07;
  pointer-events: none;
}

.account-list,
.request-meta {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.6rem;
  margin: 0 0 1rem;
}

.account-list div,
.summary-accounts div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.request-meta div {
  display: grid;
  grid-template-columns: minmax(88px, 118px) 1fr;
  align-items: center;
  gap: 0.75rem;
}

dt,
.summary-accounts span {
  color: var(--muted);
  font-weight: 600;
}

dd {
  margin: 0;
  font-weight: 800;
}

.card-actions,
.avatar-form,
.review-actions,
.form-actions,
.section-title-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.avatar-form {
  position: relative;
  z-index: 1;
  margin-top: 0.75rem;
}

.tool-panel,
.summary-row,
.empty-state {
  padding: 1rem;
}

.stacked-form {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.balance-tile {
  padding: 1rem;
  min-height: 108px;
}

.balance-tile span {
  display: block;
  color: var(--muted);
  font-weight: 700;
}

.balance-tile strong {
  display: block;
  margin-top: 0.4rem;
  font-size: 1.55rem;
  letter-spacing: 0;
}

.account-1 { border-top: 4px solid var(--spending); }
.account-2 { border-top: 4px solid var(--saving); }
.account-3 { border-top: 4px solid var(--giving); }

.request-form > div,
.split-form > div {
  grid-column: span 4;
}

.request-form .request-note,
.request-form button,
.split-form .wide {
  grid-column: 1 / -1;
}

.request-list,
.request-board,
.summary-list {
  margin-top: 0.8rem;
}

.request-item,
.request-card {
  border-left: 4px solid var(--line);
}

.request-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}

.request-card {
  padding: 1rem;
}

.request-card-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.request-card-main strong {
  white-space: nowrap;
  font-size: 1.2rem;
}

.status-pill {
  display: inline-flex;
  margin-bottom: 0.35rem;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: #eef2f7;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.status-pending { border-left-color: var(--warning); }
.status-approved { border-left-color: var(--saving); }
.status-rejected { border-left-color: var(--danger); }

.review-actions {
  align-items: stretch;
  flex-wrap: wrap;
  margin-top: 0.85rem;
}

.review-actions form {
  display: flex;
  gap: 0.5rem;
  flex: 1 1 260px;
}

.request-note-text {
  margin: 0.5rem 0;
}

.summary-accounts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.login-panel {
  display: grid;
  min-height: calc(100vh - 4rem);
  place-items: center;
}

.login-card {
  width: min(430px, 100%);
  padding: 1.5rem;
}

.login-card p {
  color: var(--muted);
}

.login-mark {
  width: 3.25rem;
  height: 3.25rem;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.dev-login {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.btn {
  border-radius: 8px;
  font-weight: 700;
}

.btn-primary {
  border-color: var(--primary);
  background: var(--primary);
}

.btn-primary:hover {
  border-color: var(--primary-dark);
  background: var(--primary-dark);
}

@media (max-width: 720px) {
  .app-nav,
  .page-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-actions {
    justify-content: flex-start;
  }

  .quick-form input,
  .quick-form button,
  .request-form > div,
  .split-form > div,
  .summary-accounts {
    grid-column: 1 / -1;
  }

  .summary-accounts {
    grid-template-columns: 1fr;
  }

  .review-actions form,
  .avatar-form {
    flex-direction: column;
  }
}