/* ============================================================
   PH-GYS Weight & Balance Calculator
   Stichting Vliegmaterieel Schiphol (SVS)
   Brand: Orange (#E8731A) & White
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --svs-orange: #E8731A;
  --svs-orange-light: #FFF3EB;
  --svs-orange-dark: #C45F10;
  --text-dark: #333;
  --bg-white: #fff;
  --success: #2E7D32;
  --error: #C62828;

  --border-color: #ddd;
  --border-radius: 4px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.12);
  --transition: 0.15s ease;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background: #f5f5f5;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Header ---------- */
header {
  background: var(--svs-orange);
  color: #fff;
  padding: 1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  background: #fff;
  color: var(--svs-orange);
  padding: 0.15rem 0.55rem;
  border-radius: var(--border-radius);
  line-height: 1.2;
  user-select: none;
}

header h1 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.header-right {
  display: flex;
  align-items: center;
}

#lang-toggle {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  padding: 0.35rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

#lang-toggle:hover,
#lang-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
}

.disclaimer {
  width: 100%;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  opacity: 0.85;
  font-style: italic;
}

/* ---------- Main Layout ---------- */
main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 1280px;
  width: 100%;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
  flex: 1;
}

/* ---------- Section common ---------- */
.calculator,
.envelope-graph {
  background: var(--bg-white);
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
  padding: 1.25rem;
  overflow: hidden;
  min-width: 0;
}

.calculator h2,
.envelope-graph h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--svs-orange-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--svs-orange-light);
}

/* ---------- Calculator Table ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  background: var(--svs-orange-light);
  color: var(--text-dark);
  font-weight: 700;
  text-align: left;
  padding: 0.6rem 0.5rem;
  border-bottom: 2px solid var(--svs-orange);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

thead th:nth-child(n+2) {
  text-align: right;
}

tbody td {
  padding: 0.5rem 0.5rem;
  border-bottom: 1px solid #eee;
  vertical-align: middle;
}

tbody tr:hover {
  background: #fafafa;
}

/* Right-align numeric columns (2, 3, 4) */
tbody td:nth-child(2),
tbody td:nth-child(3),
tbody td:nth-child(4) {
  text-align: right;
}

/* Spans within numeric columns */
tbody td span {
  font-variant-numeric: tabular-nums;
}

/* Labels in first column */
tbody td:first-child {
  font-weight: 500;
}

tbody td label {
  font-weight: 500;
  cursor: pointer;
}

/* ---------- Subtotal Rows ---------- */
tr.subtotal {
  background: #f7f0ea;
}

tr.subtotal td {
  font-weight: 700;
  border-bottom: 2px solid var(--svs-orange-light);
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

.limit-note {
  font-weight: 400;
  font-size: 0.8rem;
  color: #777;
}

tr.subtotal-status td,
tr.subtotal-extra td {
  padding: 0.25rem 0.5rem;
  border-bottom: 1px solid #eee;
  background: #fdfaf8;
}

tr.subtotal-extra td {
  font-size: 0.85rem;
  color: #555;
}

/* ---------- Status Pills ---------- */
.status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.status.ok {
  background: #e8f5e9;
  color: var(--success);
}

.status.warn,
.status.over {
  background: #fce4ec;
  color: var(--error);
}

/* ---------- Input Fields ---------- */
input[type="number"] {
  width: 6.5rem;
  padding: 0.4rem 0.5rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: inherit;
  color: var(--text-dark);
  transition: border-color var(--transition), box-shadow var(--transition);
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--svs-orange);
  box-shadow: 0 0 0 2.5px rgba(232, 115, 26, 0.18);
}

input[type="number"].input-error {
  border-color: var(--error);
  box-shadow: 0 0 0 2.5px rgba(198, 40, 40, 0.15);
}

/* Fuel input group */
.fuel-input {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.unit-label {
  font-size: 0.8rem;
  color: #888;
}

.converted-kg {
  display: block;
  font-size: 0.78rem;
  color: #888;
  text-align: right;
  margin-top: 0.15rem;
}

/* ---------- Envelope Graph (right column) ---------- */
.envelope-graph {
  position: sticky;
  top: 1rem;
  align-self: start;
}

#cg-canvas {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid #eee;
  border-radius: var(--border-radius);
  background: var(--bg-white);
}

/* ---------- Footer ---------- */
footer {
  background: #f0f0f0;
  border-top: 1px solid #ddd;
  text-align: center;
  padding: 1rem 1.5rem;
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--svs-orange);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: color var(--transition);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--svs-orange-dark);
  text-decoration: underline;
}

.footer-credit {
  font-size: 0.8rem;
  color: #888;
}

.footer-actions {
  display: flex;
  gap: 0.5rem;
}

/* ---------- Buttons (Print & Reset) ---------- */
#btn-print,
#btn-reset {
  background: var(--svs-orange);
  color: #fff;
  border: none;
  padding: 0.45rem 1.1rem;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}

#btn-print:hover,
#btn-print:focus-visible,
#btn-reset:hover,
#btn-reset:focus-visible {
  background: var(--svs-orange-dark);
  box-shadow: var(--shadow-sm);
}

#btn-reset {
  background: transparent;
  color: var(--svs-orange);
  border: 1.5px solid var(--svs-orange);
}

#btn-reset:hover,
#btn-reset:focus-visible {
  background: var(--svs-orange-light);
  color: var(--svs-orange-dark);
  border-color: var(--svs-orange-dark);
}

/* ---------- Print-Only Section (hidden on screen) ---------- */
.print-only {
  display: none;
}

/* Print canvas image — hidden on screen, shown in @media print */
.print-canvas-img {
  display: none;
}

/* ============================================================
   RESPONSIVE: Mobile (max-width: 768px)
   ============================================================ */
@media (max-width: 768px) {
  main {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 0 0.75rem;
    margin: 1rem auto;
  }

  header {
    padding: 0.75rem 1rem;
  }

  header h1 {
    font-size: 0.95rem;
  }

  .logo {
    font-size: 1.3rem;
  }

  .calculator,
  .envelope-graph {
    padding: 0.75rem;
  }

  .envelope-graph {
    position: static;
  }

  table {
    font-size: 0.82rem;
  }

  thead th,
  tbody td {
    padding: 0.4rem 0.3rem;
  }

  input[type="number"] {
    width: 5.5rem;
    font-size: 0.85rem;
  }

  footer {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
  @page {
    margin: 10mm;
    size: A4 portrait;
  }

  /* Reset colors and backgrounds */
  * {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 10px;
    line-height: 1.35;
  }

  /* Hide non-printable elements */
  #lang-toggle,
  #btn-print,
  #btn-reset,
  .footer-links,
  .footer-actions {
    display: none !important;
  }

  /* Header: keep branding but simplify */
  header {
    background: var(--svs-orange) !important;
    color: #fff !important;
    padding: 6mm 8mm;
    box-shadow: none;
    page-break-after: avoid;
    break-after: avoid;
  }

  header h1 {
    font-size: 12px;
  }

  .disclaimer {
    font-size: 8px;
  }

  /* Layout: single column for print */
  main {
    display: block;
    max-width: 100%;
    padding: 0;
    margin: 0;
  }

  .calculator,
  .envelope-graph {
    box-shadow: none;
    border-radius: 0;
    padding: 2mm 0;
    background: none;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .calculator h2,
  .envelope-graph h2 {
    font-size: 11px;
    margin-bottom: 2mm;
    padding-bottom: 1mm;
  }

  /* Table: compact for print */
  table {
    font-size: 9px;
    border: 1px solid #999;
  }

  thead th {
    background: #eee !important;
    color: #000;
    padding: 1.5mm 2mm;
    font-size: 8px;
    border-bottom: 1.5px solid #333;
  }

  tbody td {
    padding: 1.5mm 2mm;
    border-bottom: 0.5px solid #ccc;
  }

  tr.subtotal td {
    border-bottom: 1.5px solid #999;
    background: #f2f2f2 !important;
  }

  /* Input fields: display as plain text for print */
  input[type="number"] {
    border: none;
    background: none;
    padding: 0;
    font-size: 9px;
    width: auto;
    box-shadow: none;
    -moz-appearance: textfield;
  }

  /* Canvas: hide in print — use snapshot image instead */
  #cg-canvas {
    display: none !important;
  }

  /* Print canvas snapshot image */
  .print-canvas-img {
    display: block !important;
    width: 100%;
    max-height: 110mm;
    object-fit: contain;
    border: 1px solid #ccc;
  }

  /* Footer: minimal */
  footer {
    background: none;
    border-top: 0.5px solid #ccc;
    padding: 2mm 0;
    font-size: 8px;
    page-break-before: avoid;
    break-before: avoid;
  }

  .footer-credit {
    font-size: 8px;
    color: #555;
  }

  /* Show PIC signature block */
  .print-only {
    display: block !important;
    margin-top: 6mm;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .pic-signature {
    border: 1.5px solid #333;
    padding: 4mm 5mm;
  }

  .pic-signature h3 {
    font-size: 10px;
    margin-bottom: 3mm;
    color: #000;
  }

  .signature-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 9px;
    border: none;
  }

  .signature-table td {
    padding: 2mm 2mm;
    border: none;
    vertical-align: bottom;
  }

  .signature-line {
    border-bottom: 1px solid #333 !important;
    min-width: 50mm;
    color: transparent;
  }

  .pic-disclaimer {
    margin-top: 3mm;
    font-size: 8px;
    font-style: italic;
    color: #555;
  }
}