:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #4a4a4a;
  --border: #c9c9c9;
  --accent-green: #8fd694;
  --accent-green-dark: #5fb768;
  --accent-green-darker: #47a052;
  --error: #b3261e;
  --focus: #2b6cb0;
  --header-bg: #f4f6f4;
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Noto Sans Devanagari", Arial, sans-serif;
  line-height: 1.5;
}

.page-header {
  text-align: center;
  padding: 28px 16px 18px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
}
.page-header h1 { margin: 0 0 8px; font-size: 1.8rem; color: var(--text); }
.page-header .subtitle { margin: 0 auto; max-width: 640px; color: var(--muted); font-size: 0.98rem; }

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

.form-section {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 22px;
  background: #fff;
}
.form-section h2 {
  font-size: 1.15rem;
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-green);
}
.section-hint { color: var(--muted); font-size: 0.9rem; margin-top: -6px; margin-bottom: 12px; }

.grid { display: grid; gap: 14px; margin-bottom: 14px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.field { display: flex; flex-direction: column; gap: 6px; }
.field-inline { max-width: 420px; }
label, legend { font-weight: 600; font-size: 0.92rem; color: var(--text); }
.required { color: var(--error); }

input[type="text"], input[type="number"], input[type="date"], input[type="time"], select, textarea {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--text);
  background: #fff;
  width: 100%;
}
input:focus, select:focus, textarea:focus, button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 1px;
  border-color: var(--focus);
}
.small-input { width: 100px; }

.input-hint { margin: 2px 0 0; font-size: 0.82rem; color: var(--muted); }
.input-error { border-color: var(--error) !important; }
.field-error { color: var(--error); font-size: 0.83rem; margin-top: 4px; }

fieldset.field { border: none; padding: 0; margin: 0; }
.radio-group { display: flex; gap: 24px; margin-top: 4px; }
.radio-label { display: flex; align-items: center; gap: 6px; font-weight: 400; font-size: 0.95rem; }

.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
.journey-table { border-collapse: collapse; width: 100%; min-width: 1150px; font-size: 0.85rem; }
.journey-table th, .journey-table td { border: 1px solid var(--border); padding: 6px; text-align: left; vertical-align: top; }
.journey-table th { background: var(--header-bg); font-weight: 600; white-space: nowrap; }
.journey-table td input, .journey-table td select { padding: 6px; font-size: 0.85rem; min-width: 100px; }
.journey-table td:last-child { text-align: center; }

.row-remove-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--error);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 0.9rem;
}
.row-remove-btn:hover { background: #fdecea; }

.summary-grid { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.summary-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.summary-label { min-width: 90px; font-weight: 600; }
.summary-total-row { font-weight: 700; border-top: 1px solid var(--border); padding-top: 10px; }

.btn {
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-primary {
  background: var(--accent-green);
  color: #123314;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-green-dark); }

.btn-secondary {
  background: #eef7ef;
  color: #1f5c26;
  border: 1px solid var(--accent-green-dark);
}
.btn-secondary:hover:not(:disabled) { background: #dcf0dd; }

.generate-wrap { text-align: center; margin: 30px 0; }
.btn-large { padding: 16px 40px; font-size: 1.1rem; border-radius: 12px; }

.result-section {
  text-align: center;
  border: 2px solid var(--accent-green-dark);
  border-radius: 12px;
  padding: 26px 16px;
  margin-bottom: 30px;
  background: #f4fbf4;
}
.result-section h2 { margin-top: 0; }
.result-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 14px; }
.share-btn { margin-top: 4px; }

.about-section { border-top: 1px solid var(--border); padding-top: 24px; }
.about-section h2 { font-size: 1.2rem; }
.about-section p { color: var(--text); font-size: 0.95rem; }
.disclaimer { color: var(--muted); font-size: 0.85rem; font-style: italic; border-top: 1px dashed var(--border); padding-top: 12px; margin-top: 18px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 20px);
  background: #2c2c2c;
  color: #fff;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  max-width: 90vw;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
}
.toast.visible { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }

/* Merge toolbar & km toggle */
.select-cell { text-align: center; width: 40px; }
.km-cell { min-width: 150px; }
.km-toggle-label { display: flex; align-items: center; gap: 5px; font-weight: 400; font-size: 0.8rem; white-space: nowrap; }
.km-exact-input { margin-top: 4px; }
.merged-cell-input { background: #f0f0f0; color: #888; font-style: italic; }
tr.has-merged-cells { background: #fbfaf3; }

.merge-toolbar { margin-top: 16px; border-top: 1px dashed var(--border); padding-top: 14px; }
.merge-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.custom-merge-panel {
  margin-top: 12px;
  padding: 14px;
  border: 1px solid var(--accent-green-dark);
  border-radius: 8px;
  background: #f4fbf4;
}
.merge-columns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 8px 16px;
  margin: 10px 0;
}
.merge-col-checkbox { display: flex; align-items: center; gap: 6px; font-weight: 400; font-size: 0.9rem; }
.merge-panel-actions { display: flex; gap: 10px; margin-top: 8px; }

.auto-count {
  min-width: 45px;
  display: inline-block;
  text-align: center;
  font-weight: 700;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--header-bg);
}

/* Responsive */
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  :root { font-size: 15px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-section { padding: 16px; }
  .btn-large { width: 100%; }
  .result-buttons { flex-direction: column; }
  .result-buttons .btn { width: 100%; }
  .page-header h1 { font-size: 1.4rem; }
}