:root {
  --bg:          #DDE9F7;
  --bg-card:     #FFFFFF;
  --bg-gloss:    #EEF5FF;
  --ink:         #0D1E3A;
  --ink-soft:    #2A4E7A;
  --ink-muted:   #6080A0;
  --accent:      #1D60D8;
  --accent-deep: #1040A0;
  --accent-soft: rgba(29,96,216,0.08);
  --rule:        rgba(29,96,216,0.2);
  --grid:        rgba(29,96,216,0.1);
  --glow:        rgba(29,96,216,0.25);
  --shine:       rgba(255,255,255,0.8);
}

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

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter Tight', sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(29,96,216,0.08) 0%, transparent 70%),
    radial-gradient(circle at 1px 1px, rgba(29,96,216,0.07) 1px, transparent 0);
  background-size: 100% 100%, 24px 24px;
  min-height: 100vh;
  padding: 32px 24px 80px;
}

.frame { max-width: 1240px; margin: 0 auto; }

/* MASTHEAD */
.masthead {
  border-top: 2px solid var(--accent);
  border-bottom: 1px solid var(--rule);
  padding: 20px 0 16px;
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
}
.masthead-back {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}
.masthead-back:hover { color: var(--accent-deep); }
.masthead .edition {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* TITLE BLOCK */
.title-block {
  text-align: center;
  padding: 36px 0 28px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 40px;
}
.title-block .kicker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.title-block h1 {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: clamp(48px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-variation-settings: 'opsz' 144;
}
.title-block h1 em { font-style: italic; font-weight: 400; color: var(--accent); }
.title-block .dek {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 18px;
  color: var(--ink-soft);
  margin-top: 18px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

/* ERROR BANNER */
.error-banner {
  background: rgba(59,130,246,0.1);
  border: 1px solid var(--accent);
  padding: 14px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #60A5FA;
  margin-bottom: 28px;
}

/* LAYOUT */
.grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 40px;
  align-items: start;
}

/* CONTROLS */
.controls {
  background: linear-gradient(160deg, var(--bg-gloss) 0%, var(--bg-card) 100%);
  border: 1px solid var(--rule);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), inset 0 1px 0 var(--shine);
  padding: 32px 28px;
  position: sticky;
  top: 24px;
  border-radius: 2px;
}
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--grid);
}
.field { margin-bottom: 22px; }
.field label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.field label .hint { color: var(--ink-muted); letter-spacing: 0.08em; text-transform: none; }
.input-wrap { position: relative; }
.input-wrap .prefix,
.input-wrap .suffix {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  font-family: 'Fraunces', serif;
  font-size: 22px;
  color: var(--ink-muted);
  pointer-events: none;
}
.input-wrap .prefix { left: 14px; }
.input-wrap .suffix { right: 14px; }
input[type="number"], select {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--grid);
  border-radius: 0;
  padding: 12px 14px;
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-size: 22px;
  color: var(--ink);
  letter-spacing: -0.01em;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  appearance: none;
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.input-wrap.has-prefix input { padding-left: 30px; }
.input-wrap.has-suffix input { padding-right: 30px; }
input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(29,96,216,0.06);
  box-shadow: 0 0 0 3px rgba(29,96,216,0.12), inset 0 1px 0 var(--shine);
}
select {
  cursor: pointer;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236080A0' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  background-color: rgba(255,255,255,0.04);
}
.calc-btn {
  width: 100%;
  background: linear-gradient(135deg, #3B7BF0 0%, #1040A0 100%);
  color: #fff;
  border: none;
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  margin-top: 6px;
  border-radius: 2px;
  box-shadow: 0 4px 16px var(--glow), inset 0 1px 0 rgba(255,255,255,0.2);
  transition: box-shadow 0.15s, transform 0.1s;
}
.calc-btn:hover {
  box-shadow: 0 6px 24px var(--glow), inset 0 1px 0 rgba(255,255,255,0.25);
  transform: translateY(-1px);
}
.calc-btn:active { transform: translateY(0); }

/* RESULTS PANE */
.results-pane { display: flex; flex-direction: column; gap: 32px; }

/* HEADLINE */
.headline-result {
  background: linear-gradient(160deg, var(--bg-gloss) 0%, var(--bg-card) 100%);
  border: 1px solid var(--rule);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), inset 0 1px 0 var(--shine);
  padding: 36px 32px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 24px;
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}
.headline-result::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: linear-gradient(to bottom, #5090EE, #1040A0);
}
.headline-result::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
}
.headline-result .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.headline-result .figure {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: clamp(48px, 7vw, 84px);
  line-height: 1;
  letter-spacing: -0.035em;
  font-variation-settings: 'opsz' 144;
  color: var(--ink);
}
.headline-result .figure .cents {
  font-size: 0.45em;
  color: var(--ink-muted);
  vertical-align: top;
  margin-left: 4px;
  letter-spacing: 0;
}
.headline-result .figure .unit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.16em;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: block;
  margin-top: 10px;
}
.seal {
  width: 88px; height: 88px;
  border: 1px solid rgba(29,96,216,0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(29,96,216,0.15), inset 0 0 20px rgba(29,96,216,0.04);
}
.seal-inner {
  width: 76px; height: 76px;
  border: 1px solid rgba(29,96,216,0.25);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 8px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.3;
  text-align: center;
  color: var(--ink-soft);
}
.seal-inner .term {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 22px;
  letter-spacing: 0;
  text-transform: none;
  line-height: 1;
  margin: 2px 0;
  font-weight: 500;
  color: var(--accent);
}

/* STATS ROW */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--rule);
  background: linear-gradient(160deg, var(--bg-gloss) 0%, var(--bg-card) 100%);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3), inset 0 1px 0 var(--shine);
  border-radius: 2px;
}
.stat { padding: 24px 22px; border-right: 1px solid var(--grid); }
.stat:last-child { border-right: none; }
.stat .stat-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 10px;
}
.stat .stat-value {
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.stat .stat-detail {
  font-family: 'Inter Tight', sans-serif;
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 4px;
}

/* HISTORY TABLE */
.table-card {
  background: linear-gradient(160deg, var(--bg-gloss) 0%, var(--bg-card) 100%);
  border: 1px solid var(--rule);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3), inset 0 1px 0 var(--shine);
  border-radius: 2px;
}
.table-header {
  padding: 24px 28px 18px;
  border-bottom: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.table-title {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-weight: 400;
  font-size: 22px;
  color: var(--ink);
}
.table-scroll { max-height: 440px; overflow-y: auto; }
table { width: 100%; border-collapse: collapse; font-family: 'JetBrains Mono', monospace; font-size: 13px; }
thead th {
  background: var(--bg-gloss);
  position: sticky;
  top: 0;
  text-align: right;
  padding: 14px 20px;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--rule);
  font-weight: 500;
  white-space: nowrap;
}
thead th:first-child { text-align: left; }
tbody td {
  padding: 12px 20px;
  text-align: right;
  border-bottom: 1px solid var(--grid);
  color: var(--ink);
  white-space: nowrap;
}
tbody td:first-child { text-align: left; color: var(--ink-soft); }
tbody td.monthly-col { color: var(--accent); font-weight: 500; }
tbody tr:hover td { background: rgba(29,96,216,0.06); }
td.del-col { text-align: center !important; width: 36px; padding: 0 !important; }
td.del-col form { margin: 0; }
.del-btn {
  background: none;
  border: none;
  color: var(--ink-muted);
  cursor: pointer;
  font-size: 18px;
  padding: 12px 8px;
  line-height: 1;
  transition: color 0.15s;
  font-family: 'Inter Tight', sans-serif;
}
.del-btn:hover { color: #F87171; }

/* EMPTY STATE */
.empty-state {
  background: linear-gradient(160deg, var(--bg-gloss) 0%, var(--bg-card) 100%);
  border: 1px solid var(--rule);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3), inset 0 1px 0 var(--shine);
  padding: 80px 32px;
  text-align: center;
  border-radius: 2px;
}
.empty-icon {
  font-family: 'Fraunces', serif;
  font-size: 64px;
  color: var(--ink-muted);
  margin-bottom: 20px;
  line-height: 1;
}
.empty-title {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 26px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}
.empty-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* COLOPHON */
.colophon {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  flex-wrap: wrap;
  gap: 12px;
}
.colophon em {
  font-family: 'Fraunces', serif;
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

/* RESPONSIVE */
@media (max-width: 920px) {
  .grid { grid-template-columns: 1fr; gap: 32px; }
  .controls { position: static; }
}
@media (max-width: 640px) {
  .stats-row { grid-template-columns: 1fr; }
  .stat { border-right: none; border-bottom: 1px solid var(--grid); }
  .stat:last-child { border-bottom: none; }
}
@media (max-width: 480px) {
  body { padding: 16px 14px 60px; }
  .controls { padding: 22px 18px; }
  .headline-result { padding: 22px 18px; grid-template-columns: 1fr; }
  .seal { display: none; }
  .headline-result .figure { font-size: clamp(36px, 10vw, 60px); }
  .title-block h1 { font-size: clamp(36px, 10vw, 60px); }
  .title-block { padding: 24px 0 20px; margin-bottom: 28px; }
  input[type="number"], select { font-size: 18px; }
  .table-scroll { overflow-x: auto; }
  thead th, tbody td { padding: 10px; }
  table { font-size: 11px; min-width: 440px; }
}

/* ANIMATIONS */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.title-block  { animation: fadeUp 0.6s ease-out 0.00s both; }
.controls     { animation: fadeUp 0.6s ease-out 0.05s both; }
.headline-result { animation: fadeUp 0.6s ease-out 0.10s both; }
.stats-row    { animation: fadeUp 0.6s ease-out 0.15s both; }
.table-card   { animation: fadeUp 0.6s ease-out 0.20s both; }
.empty-state  { animation: fadeUp 0.6s ease-out 0.10s both; }

.table-scroll::-webkit-scrollbar { width: 8px; }
.table-scroll::-webkit-scrollbar-track { background: var(--bg-card); }
.table-scroll::-webkit-scrollbar-thumb { background: rgba(29,96,216,0.25); }
.table-scroll::-webkit-scrollbar-thumb:hover { background: var(--accent); }