:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-soft: #f8f9fb;
  --panel-border: #e3e6eb;
  --text: #1a1d23;
  --muted: #697386;
  --muted-strong: #4f5968;
  --accent: #d7263d;
  --accent-dark: #b7192f;
  --ok: #2f9e44;
  --shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 1px 2px rgba(16, 24, 40, .04);
  --sans: "Inter", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "SF Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font: 14px/1.5 var(--sans);
}
body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  background: url("/geotopo_fond.jpg") center / cover no-repeat;
  opacity: .1;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(215, 38, 61, .25);
  outline-offset: 2px;
}

/* Welcome screen */
#welcomeScreen {
  position: fixed;
  z-index: 10;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
}
#welcomeScreen[hidden] { display: none; }
#welcomeScreen::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: min(56vh, 530px);
  content: "";
  pointer-events: none;
  background: url("/geotopo_fond.jpg") center bottom / cover no-repeat;
  mask-image: linear-gradient(to top, black 3%, transparent 80%);
  -webkit-mask-image: linear-gradient(to top, black 3%, transparent 80%);
}
.version-name, .version-name-secondary {
  position: fixed;
  z-index: 1;
  margin: 0;
  color: var(--accent);
  font-family: Georgia, serif;
  font-style: italic;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.version-name { top: 21px; left: 30px; font-size: 31px; }
.version-name-secondary { top: 78px; right: 24px; font-size: 11px; }
.welcome-inner {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 40px));
  padding: 32px 22px 40px;
  text-align: center;
}
.eyebrow, .workflow-summary, .unit { font: 11px/1.2 var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-weight: 700; }
.welcome-inner h1 {
  margin: 0;
  color: var(--accent);
  font-size: clamp(48px, 8vw, 68px);
  line-height: 1;
  letter-spacing: .01em;
}
.welcome-subtitle { margin: 10px 0 28px; font: 15px/1.5 var(--mono); color: var(--text); }
.welcome-cards { display: flex; gap: 18px; justify-content: center; }
.welcome-card {
  display: flex;
  flex: 1 1 0;
  min-width: 0;
  min-height: 232px;
  padding: 28px;
  color: var(--text);
  text-align: left;
  background: rgba(255, 255, 255, .95);
  border: 1px solid #d9e0e8;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .05);
  flex-direction: column;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.welcome-card:hover { border-color: var(--accent); box-shadow: 0 12px 28px rgba(0, 0, 0, .12); transform: translateY(-5px); }
.welcome-card-icon { margin-bottom: 13px; color: var(--accent); font: 42px/1 var(--mono); }
.welcome-card-title { margin-bottom: 9px; font-size: 18px; font-weight: 700; }
.welcome-card-copy { color: var(--muted-strong); font-size: 14px; line-height: 1.55; }

/* Application shell */
#appContent[hidden] { display: none; }
.app-header {
  position: sticky;
  z-index: 5;
  top: 0;
  display: flex;
  gap: 22px;
  align-items: center;
  min-height: 116px;
  padding: 13px 30px;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid #e4e7eb;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .05);
  backdrop-filter: blur(12px);
}
.brand-block h1 { margin: 0; color: var(--accent); font-size: 52px; line-height: 1; letter-spacing: .01em; }
.brand-block p { margin: 7px 0 0; color: var(--text); font: 13px/1.35 var(--mono); }
.header-spacer { flex: 1; }
.geo2x-logo { width: auto; height: 68px; object-fit: contain; }
.home-button, .secondary, button[data-action] {
  border-radius: 5px;
  padding: 8px 15px;
  font-size: 13px;
  font-weight: 650;
  transition: background .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease;
}
.home-button, .secondary {
  color: var(--muted-strong);
  background: var(--panel);
  border: 1px solid #ccd3db;
}
.home-button:hover, .secondary:hover { color: var(--text); border-color: #aeb8c3; box-shadow: var(--shadow); }
button[data-action] { color: #fff; background: var(--accent); border: 1px solid var(--accent); }
button[data-action]:hover { background: var(--accent-dark); border-color: var(--accent-dark); box-shadow: 0 3px 8px rgba(215, 38, 61, .2); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: .45; cursor: wait; }

main { width: min(1080px, 100%); margin: 0 auto; padding: 24px 28px 80px; }
.workflow-summary { display: flex; gap: 0; margin-bottom: 18px; overflow-x: auto; color: var(--muted); background: rgba(255, 255, 255, .76); border: 1px solid var(--panel-border); border-radius: 7px; }
.workflow-summary span { flex: 1 0 auto; padding: 8px 10px; text-align: center; border-right: 1px solid var(--panel-border); }
.workflow-summary span:last-child { border-right: 0; }
.step { padding: 20px 22px; margin-bottom: 18px; scroll-margin-top: 132px; background: rgba(255, 255, 255, .96); border: 1px solid var(--panel-border); border-radius: 10px; box-shadow: var(--shadow); }
.step-head { display: flex; gap: 10px; align-items: baseline; margin-bottom: 8px; }
.step-num { padding: 1px 7px; color: var(--accent); border: 1px solid var(--accent); border-radius: 4px; font: 13px/1.4 var(--mono); }
h2 { margin: 0; font-size: 17px; font-weight: 650; }
h3 { margin: 23px 0 10px; font-size: 14px; }
.step-description { max-width: 780px; margin: 0; color: var(--muted); }
.row { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; margin-top: 15px; }
.upload-row { align-items: center; }
.field { display: flex; min-width: 0; color: var(--muted); font-size: 12px; font-weight: 500; flex-direction: column; gap: 5px; }
.file-field { min-width: min(100%, 410px); }
input, select {
  width: 100%;
  min-width: 170px;
  min-height: 36px;
  padding: 7px 9px;
  color: var(--text);
  background: #f3f4f6;
  border: 1px solid var(--panel-border);
  border-radius: 5px;
  font: 13px/1.2 var(--mono);
}
input:hover, select:hover { border-color: #c9d0d8; }
input[type="file"] { padding: 5px 7px; }
input[type="file"]::file-selector-button { margin-right: 10px; padding: 4px 8px; color: var(--muted-strong); background: #fff; border: 1px solid #d4dae1; border-radius: 3px; font: 12px var(--sans); }
.field-note { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
code { padding: 1px 4px; color: var(--muted-strong); background: #f1f3f5; border-radius: 3px; font-family: var(--mono); }
.fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 16px; }
.unit { display: inline; color: var(--muted); font-size: inherit; text-transform: none; }
.advanced-controls { margin-top: 17px; border-top: 1px solid var(--panel-border); }
.advanced-controls summary { padding-top: 14px; color: var(--muted-strong); cursor: pointer; font-size: 13px; font-weight: 650; }
.advanced-controls summary::marker { color: var(--accent); }
.advanced { padding-top: 4px; }
.action-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 15px; }
.action-hint { color: var(--muted); font: 12px/1.4 var(--mono); }
.result-step { min-height: 120px; }
.result-step > p { margin: 0; color: var(--muted); }
.result-status { color: var(--text) !important; font-family: var(--mono); }
.result-status strong { color: var(--accent); font-weight: 700; }
.job-progress { margin: 16px 0; }
.progress-heading { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 7px; font-size: 13px; }
.progress-heading span { white-space: nowrap; color: var(--muted-strong); font-family: var(--mono); }
.job-progress progress { display: block; width: 100%; height: 15px; margin-bottom: 6px; accent-color: var(--accent); }
.job-stage { margin: 12px 0; color: var(--muted-strong); font-size: 13px; }
.run-log { margin: 16px 0; }
.run-log h3 { margin: 0 0 8px; }
.run-log pre { max-height: 190px; margin: 0 0 7px; padding: 12px; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--muted-strong); background: #f3f4f6; border: 1px solid var(--panel-border); border-radius: 5px; font: 11px/1.5 var(--mono); }
.download {
  display: inline-block;
  padding: 8px 13px;
  color: #fff;
  text-decoration: none;
  background: var(--ok);
  border-radius: 5px;
  font-size: 13px;
  font-weight: 650;
}
.download:hover { filter: brightness(.95); }
.preview-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; }
figure { margin: 0; overflow: hidden; background: #fff; border: 1px solid var(--panel-border); border-radius: 6px; }
figure a { display: block; }
figure img { display: block; width: 100%; height: auto; background: #fff; }
figcaption { padding: 7px 9px; overflow-wrap: anywhere; color: var(--muted); font: 11px/1.4 var(--mono); border-top: 1px solid var(--panel-border); }
.result-step ul { padding-left: 19px; color: var(--muted); font: 12px/1.6 var(--mono); }
.project-parts { display: grid; grid-template-columns: minmax(100px, .65fr) auto minmax(160px, 1fr) auto minmax(160px, 1fr); gap: 9px; align-items: end; margin-top: 15px; }
.project-parts input { min-width: 0; }
.project-separator { padding-bottom: 6px; color: var(--muted-strong); font: 20px/1 var(--mono); }
#project-jobs { margin-top: 12px; color: var(--muted); }
#project-jobs ul { padding-left: 19px; font: 12px/1.8 var(--mono); }
#project-jobs li { margin: 5px 0; }
#project-jobs .job-open { margin-right: 8px; }
a { color: var(--accent-dark); }

@media (min-width: 1700px) { main { transform-origin: top center; zoom: 1.08; } }
@media (max-width: 720px) {
  #welcomeScreen { display: block; overflow-y: auto; }
  .welcome-inner { margin: 90px auto 24px; }
  .version-name { top: 15px; left: 18px; font-size: 25px; }
  .version-name-secondary { top: 53px; right: 18px; font-size: 9px; }
  .welcome-cards { flex-direction: column; }
  .welcome-card { min-height: 0; }
  .app-header { min-height: auto; gap: 12px; padding: 12px 16px; }
  .brand-block h1 { font-size: 36px; }
  .brand-block p { font-size: 10px; }
  .home-button { padding: 7px 9px; white-space: nowrap; }
  .geo2x-logo { display: none; }
  main { padding: 18px 14px 50px; }
  .step { padding: 17px; }
  .workflow-summary span { padding: 7px 3px; font-size: 9px; }
  .fields { grid-template-columns: 1fr; }
  .project-parts { grid-template-columns: 1fr; }
  .project-separator { display: none; }
  .file-field { width: 100%; }
}