:root {
  --primary: #0EA872;
  --primary-dark: #0B8E60;
  --primary-soft: #E4F7EF;
  --bg: #F3F4F7;
  --card: #FFFFFF;
  --ink: #16181D;
  --ink-soft: #6B7280;
  --line: #ECEDF1;
  --danger: #E11D48;
  --danger-soft: #FDE8ED;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-card: 0 1px 2px rgba(16,24,40,0.04), 0 8px 20px rgba(16,24,40,0.05);
  --shadow-float: 0 8px 24px rgba(16,24,40,0.16);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #21D48C;
    --primary-dark: #1BB878;
    --primary-soft: rgba(33,212,140,0.14);
    --bg: #0B0C0F;
    --card: #17181D;
    --ink: #F2F3F5;
    --ink-soft: #92959C;
    --line: #262830;
    --danger: #FB6A85;
    --danger-soft: rgba(251,106,133,0.12);
    --shadow-card: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px rgba(0,0,0,0.35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 17px;
  letter-spacing: 0.01em;
}

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

#app {
  max-width: 560px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: 120px;
  position: relative;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(env(safe-area-inset-top, 0px) + 18px) 20px 8px;
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 10;
}
.app-header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--card);
  box-shadow: var(--shadow-card);
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  flex: none;
}
.icon-btn:active { transform: scale(0.92); }

main { padding: 4px 16px 8px; }

.screen { display: none; }
.screen.active {
  display: block;
  animation: screenIn 0.28s cubic-bezier(.2,.8,.2,1);
}
@keyframes screenIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.month-summary-card {
  background: linear-gradient(155deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  text-align: center;
  box-shadow: 0 10px 28px -8px color-mix(in srgb, var(--primary) 60%, transparent);
  margin: 10px 0 20px;
  color: white;
}
.month-label { color: rgba(255,255,255,0.85); font-size: 15px; margin-bottom: 6px; font-weight: 600; }
.month-total { font-size: 38px; font-weight: 800; letter-spacing: -0.02em; }

.entry-list { display: flex; flex-direction: column; gap: 8px; }

.entry-date-heading {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 18px 2px 6px;
}

.entry-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}
.entry-card:active { transform: scale(0.985); }
.entry-emoji {
  font-size: 22px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent, var(--primary)) 16%, transparent);
  flex: none;
}
.entry-info { flex: 1; min-width: 0; }
.entry-store { font-weight: 700; font-size: 16px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.entry-category { color: var(--ink-soft); font-size: 13px; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.entry-amount { font-weight: 800; font-size: 17px; white-space: nowrap; letter-spacing: -0.01em; }

.empty-hint {
  text-align: center;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-top: 48px;
  font-size: 15px;
}

.link-button {
  display: block;
  margin: 22px auto 0;
  background: none;
  border: none;
  color: var(--primary-dark);
  font-size: 15px;
  font-weight: 700;
  padding: 10px;
}

.month-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin: 14px 0 18px;
  font-size: 17px;
  font-weight: 800;
}
.month-nav button {
  border: none;
  background: var(--card);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 15px;
  color: var(--ink);
  box-shadow: var(--shadow-card);
}
.month-nav button:active { transform: scale(0.9); }

.summary-total {
  text-align: center;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

.category-bars { display: flex; flex-direction: column; gap: 10px; }
.category-bar-row { background: var(--card); border-radius: var(--radius-md); padding: 14px 16px; box-shadow: var(--shadow-card); }
.category-bar-top { display: flex; justify-content: space-between; font-size: 15px; font-weight: 600; margin-bottom: 10px; }
.category-bar-track { background: var(--line); border-radius: 8px; height: 10px; overflow: hidden; }
.category-bar-fill { height: 100%; border-radius: 8px; }

h2 { font-size: 20px; margin: 10px 2px 18px; font-weight: 800; letter-spacing: -0.01em; }

.note-box {
  background: color-mix(in srgb, #F59E0B 14%, var(--card));
  border: 1px solid color-mix(in srgb, #F59E0B 35%, transparent);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.6;
}

.confirm-preview {
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 18px;
  box-shadow: var(--shadow-card);
}

.field {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.field input {
  display: block;
  width: 100%;
  margin-top: 7px;
  padding: 14px 15px;
  font-size: 17px;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--card);
  box-shadow: inset 0 0 0 1.5px var(--line);
  color: var(--ink);
  font-family: inherit;
  text-transform: none;
  letter-spacing: normal;
}
.field input:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--primary);
}

.field-hint {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin: -8px 0 16px 2px;
}

.field-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.items-editor { display: flex; flex-direction: column; gap: 8px; margin-bottom: 8px; }
.item-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 8px;
  box-shadow: inset 0 0 0 1.5px var(--line);
}
.item-name-input, .item-price-input {
  border: none;
  background: transparent;
  font-size: 15px;
  padding: 8px 6px;
  color: var(--ink);
  min-width: 0;
}
.item-name-input { flex: 1; }
.item-price-input { width: 84px; text-align: right; }
.item-name-input:focus, .item-price-input:focus { outline: none; }
.item-remove-btn {
  border: none;
  background: var(--danger-soft);
  color: var(--danger);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  font-size: 13px;
  flex: none;
}
.item-remove-btn:active { transform: scale(0.9); }

.add-item-btn {
  border: 1.5px dashed var(--line);
  background: none;
  color: var(--ink-soft);
  font-weight: 700;
  font-size: 14px;
  padding: 12px;
  border-radius: var(--radius-sm);
  width: 100%;
  margin-bottom: 20px;
}
.add-item-btn:active { background: var(--primary-soft); }

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}
.category-btn {
  border: 2px solid transparent;
  background: color-mix(in srgb, var(--accent) 10%, var(--card));
  border-radius: var(--radius-sm);
  padding: 14px 4px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}
.category-btn .emoji { display: block; font-size: 24px; margin-bottom: 6px; }
.category-btn.selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 20%, var(--card));
  font-weight: 800;
}

.confirm-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
button.btn-primary, button.btn-secondary, button.btn-danger {
  font-size: 17px;
  font-weight: 700;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: none;
}
.btn-primary { background: var(--primary); color: white; box-shadow: 0 8px 20px -6px color-mix(in srgb, var(--primary) 70%, transparent); }
.btn-primary:active { transform: scale(0.98); }
.btn-secondary { background: var(--card); color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line); }
.btn-secondary:active { transform: scale(0.98); }
.btn-danger { background: var(--danger-soft); color: var(--danger); }
.btn-danger:active { transform: scale(0.98); }

.search-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0 18px;
}
.search-topbar input {
  flex: 1;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--card);
  box-shadow: inset 0 0 0 1.5px var(--line);
  padding: 13px 16px;
  font-size: 16px;
  color: var(--ink);
}
.search-topbar input:focus { outline: none; box-shadow: inset 0 0 0 2px var(--primary); }

.search-results { display: flex; flex-direction: column; gap: 8px; }
.search-result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}
.search-result-name { font-weight: 700; font-size: 16px; }
.search-result-meta { color: var(--ink-soft); font-size: 13px; margin-top: 2px; }
.search-result-price { font-weight: 800; font-size: 17px; flex: none; }

.loading-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-soft);
  z-index: 50;
}
.spinner {
  width: 44px; height: 44px;
  border: 4px solid var(--line);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed;
  bottom: 118px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--bg);
  padding: 12px 22px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-float);
  z-index: 60;
}

.bottom-nav {
  position: fixed;
  bottom: 18px;
  left: 16px;
  right: 16px;
  max-width: 528px;
  margin: 0 auto;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 28px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px));
  box-shadow: var(--shadow-float);
}
.nav-btn {
  background: none;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 4px 20px;
}
.nav-btn.active { color: var(--primary-dark); }
.nav-icon { font-size: 21px; }

.camera-fab {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: linear-gradient(155deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  font-size: 24px;
  border: none;
  box-shadow: 0 10px 22px -6px color-mix(in srgb, var(--primary) 70%, transparent);
  margin-top: -30px;
  flex: none;
}
.camera-fab:active { transform: scale(0.94); }

.settings-title {
  font-size: 17px;
  font-weight: 800;
}

.settings-card {
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-card);
  margin-bottom: 14px;
}
.settings-card-title { font-weight: 800; font-size: 16px; margin-bottom: 6px; }
.settings-card-desc { color: var(--ink-soft); font-size: 14px; line-height: 1.6; margin: 0 0 14px; }
.settings-card .btn-primary, .settings-card .btn-secondary { width: 100%; padding: 13px; font-size: 15px; }

.settings-hint {
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
  margin-top: 8px;
  margin-bottom: 20px;
}

.lock-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 100;
}
.lock-card {
  width: 100%;
  max-width: 340px;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 32px 26px;
  text-align: center;
}
.lock-emoji { font-size: 40px; margin-bottom: 10px; }
.lock-card h2 { font-size: 18px; margin: 0 0 20px; }
.lock-card input {
  display: block;
  width: 100%;
  padding: 14px 15px;
  font-size: 17px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--bg);
  box-shadow: inset 0 0 0 1.5px var(--line);
  color: var(--ink);
  margin-bottom: 14px;
  text-align: center;
}
.lock-card input:focus { outline: none; box-shadow: inset 0 0 0 2px var(--primary); }
.lock-card .btn-primary { width: 100%; }
.lock-error { color: var(--danger); font-size: 14px; margin: 14px 0 0; }