/* ─── Reset & Base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy: #2C3E50;
  --blue: #3498DB;
  --green: #27AE60;
  --green-dark: #1E8449;
  --input-bg: #FFF9E6;
  --result-bg: #E8F5E9;
  --card-bg: #ffffff;
  --border: #ddd;
  --text: #333;
  --text-light: #666;
  --red: #E74C3C;
  --max-w: 920px;
}

html { font-size: 15px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: #f4f6f8;
  line-height: 1.5;
}

/* ─── Layout ────────────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 1rem; }

/* ─── Header ────────────────────────────────────────────── */
header {
  background: var(--navy);
  color: #fff;
  padding: 1.25rem 0;
  margin-bottom: 1.5rem;
}
header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
header h1 { font-size: 1.35rem; font-weight: 600; }
.header-controls { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }

/* Currency select */
.currency-select {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
}
.currency-select option { color: #333; background: #fff; }

/* Mode toggle */
.mode-toggle {
  display: flex;
  background: rgba(255,255,255,0.15);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.3);
}
.mode-btn {
  padding: 0.35rem 1rem;
  border: none;
  background: transparent;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s;
}
.mode-btn.active {
  background: var(--blue);
  color: #fff;
}

/* ─── Section Cards ─────────────────────────────────────── */
.section {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  margin-bottom: 1rem;
  overflow: hidden;
}
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--navy);
  color: #fff;
  cursor: pointer;
  user-select: none;
}
.section-header h2 { font-size: 1rem; font-weight: 600; }
.section-header .subtotal { font-size: 0.9rem; opacity: 0.9; }
.section-header .toggle-icon {
  font-size: 0.75rem;
  transition: transform 0.2s;
}
.section-header .toggle-icon.open { transform: rotate(180deg); }
.section-body { padding: 1rem; }

/* ─── Category Headers ──────────────────────────────────── */
.cat-header {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin: 0.75rem 0 0.35rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
}
.cat-header:first-child { margin-top: 0; }

/* ─── Input Rows ────────────────────────────────────────── */
.input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}
.input-row label {
  flex: 1;
  font-size: 0.85rem;
  color: var(--text);
}
.input-row .hint {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-left: 0.25rem;
}
.input-row input[type="number"] {
  width: 100px;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--input-bg);
  font-size: 0.85rem;
  text-align: right;
}
.input-row input[type="number"]:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 2px rgba(52,152,219,0.15);
}

/* ─── Totals Row ────────────────────────────────────────── */
.total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 2px solid var(--navy);
  font-weight: 600;
  font-size: 0.9rem;
}

/* ─── Result Cards Grid ─────────────────────────────────── */
.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

/* Packages side-by-side layout */
.packages-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.result-card {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  overflow: hidden;
  min-width: 0;
}
.result-card-header {
  background: var(--blue);
  color: #fff;
  padding: 0.6rem 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
}
.result-card-body { padding: 0.75rem; overflow-x: auto; }

/* Big number */
.big-number {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--green-dark);
  background: var(--result-bg);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  text-align: center;
}
.big-number small {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-light);
  display: block;
}

/* Sub-results */
.sub-result {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  padding: 0.2rem 0;
  border-bottom: 1px solid #f0f0f0;
}
.sub-result:last-child { border-bottom: none; }
.sub-result .label { color: var(--text-light); }
.sub-result .value { font-weight: 600; }

/* ─── Tables ────────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-top: 0.5rem;
}
.data-table th {
  background: var(--navy);
  color: #fff;
  padding: 0.35rem 0.5rem;
  text-align: left;
  font-weight: 500;
}
.data-table th:not(:first-child) { text-align: right; }
.data-table td {
  padding: 0.3rem 0.5rem;
  border-bottom: 1px solid #f0f0f0;
}
.data-table td:not(:first-child) { text-align: right; }
.data-table tr:nth-child(even) { background: #fafafa; }

/* Inline input in table */
.data-table input[type="number"],
.data-table input[type="text"] {
  width: 60px;
  padding: 0.2rem 0.3rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--input-bg);
  font-size: 0.75rem;
  text-align: right;
}
.data-table input[type="text"] {
  width: 80px;
  text-align: left;
}


/* ─── Revenue Target Banner ─────────────────────────────── */
.revenue-banner-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  margin: 0 -1rem;
  padding: 0 1rem;
  background: #f4f6f8;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}
.revenue-banner {
  background: var(--result-bg);
  border: 2px solid var(--green);
  border-radius: 8px;
  padding: 0.6rem 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}
.revenue-banner .rev-item { text-align: center; flex: 1; }
.revenue-banner .rev-label { font-size: 0.75rem; color: var(--text-light); }
.revenue-banner .rev-value { font-size: 1.25rem; font-weight: 700; color: var(--green-dark); }

/* ─── Surplus / Deficit ─────────────────────────────────── */
.surplus { color: var(--green-dark); }
.deficit { color: var(--red); }

/* ─── Section: Time Settings ────────────────────────────── */
.time-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem 1.5rem;
}

/* ─── Section: Salary / P&L ─────────────────────────────── */
.breakdown-table {
  width: 100%;
  font-size: 0.85rem;
}
.breakdown-table td { padding: 0.25rem 0; }
.breakdown-table td:last-child { text-align: right; font-weight: 600; }
.breakdown-table .indent { padding-left: 1rem; color: var(--text-light); }
.breakdown-table .total-line {
  border-top: 2px solid var(--navy);
  font-weight: 700;
}
.breakdown-table .subtotal-line {
  border-top: 1px solid var(--border);
  font-weight: 600;
}

/* ─── Quick Check Section ───────────────────────────────── */
.quick-check-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.qc-item {
  text-align: center;
  padding: 0.4rem;
  background: #f8f9fa;
  border-radius: 4px;
}
.qc-item .qc-label { font-size: 0.7rem; color: var(--text-light); }
.qc-item .qc-value { font-size: 0.95rem; font-weight: 600; }

/* ─── Reverse Calculator ────────────────────────────────── */
.reverse-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.5rem 0;
  font-size: 0.85rem;
}
.reverse-row input {
  width: 100px;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--input-bg);
  font-size: 0.85rem;
  text-align: right;
}
.reverse-row .result-badge {
  background: var(--result-bg);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-weight: 600;
}

/* ─── Hint Text ─────────────────────────────────────────── */
.hint-text {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 0.25rem;
}

/* ─── Footer ────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 1.5rem 0;
  color: var(--text-light);
  font-size: 0.8rem;
}
footer a { color: var(--blue); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 700px) {
  .results-grid { grid-template-columns: 1fr; }
  .packages-layout { grid-template-columns: 1fr; }
  .time-grid { grid-template-columns: 1fr; }
  .quick-check-grid { grid-template-columns: repeat(2, 1fr); }
  header .container { flex-direction: column; align-items: flex-start; }
  .revenue-banner { flex-direction: column; gap: 0.5rem; align-items: stretch; }
  .revenue-banner .rev-item { text-align: left; }
  .data-table { font-size: 0.75rem; }
  .input-row label { font-size: 0.8rem; }
}