/* Industry — design-system tokens and component classes, adapted from the
   project's design mockup (drawio-converter-standalone.html). Fonts are
   loaded from Google Fonts instead of embedded woff2 blobs. */

:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-accent-2: #728fab;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  --color-neutral-100: #f5f5f8;
  --color-neutral-200: #e7e7ea;
  --color-neutral-800: #424244;
  --color-neutral-900: #2b2b2d;

  --color-accent-100: #eef6ff;
  --color-accent-800: #2c455d;

  --color-accent-2-100: #eef6ff;
  --color-accent-2-800: #314457;

  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Barlow", system-ui, sans-serif;

  --space-1: 3.4px;
  --space-2: 6.8px;
  --space-3: 10.2px;
  --space-4: 13.6px;
  --space-6: 20.4px;
  --space-8: 27.2px;

  --radius-md: 4px;
}

[hidden] { display: none !important; }
* , *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.12; letter-spacing: -0.015em; margin: 0 0 var(--space-2);
}
p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* — blueprint frame: wireframe objects — square, transparent, hairline-bordered with corner marks — */
.blueprint { position: relative; border: 1px solid var(--color-divider); border-radius: 0; }
.blueprint > .corner {
  position: absolute; width: 11px; height: 11px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.blueprint > .corner::before, .blueprint > .corner::after {
  content: ""; position: absolute; background: currentColor;
}
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after  { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }
.blueprint.selected { border-color: var(--color-accent); }

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: var(--radius-md);
}
.btn svg { display: block; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.btn-primary:hover:not(:disabled) { background: color-mix(in srgb, var(--color-accent) 80%, black); }
.btn-secondary { border-color: var(--color-divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-ghost { color: var(--color-accent); border-color: transparent; padding-inline: var(--space-1); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-icon { width: 36px; height: 36px; padding: 0; }

/* — forms — */
.field > label {
  display: block; font-size: 12px; margin-bottom: 5px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}
.input {
  width: 100%; min-height: 36px; padding: 6px 10px; font: inherit;
  font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider); border-radius: var(--radius-md);
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }

/* — tables — */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  padding: var(--space-2); border-bottom: 1px solid var(--color-divider);
}
.table td {
  padding: var(--space-2);
  border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
}
.table tbody tr:hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }

/* — tags — */
.tag {
  display: inline-flex; align-items: center; font-size: 11px;
  letter-spacing: 0.02em; padding: 3px 10px;
  border-radius: calc(var(--radius-md) * 0.75);
}
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-accent-2 { background: var(--color-accent-2-100); color: var(--color-accent-2-800); }
.tag-neutral { background: var(--color-neutral-100); color: var(--color-neutral-800); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }

/* — navigation — */
.nav {
  display: flex; align-items: center; gap: var(--space-6);
  padding: var(--space-4) var(--space-8);
  border-bottom: 1px solid var(--color-divider);
}
.nav-brand {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 19px; letter-spacing: 0.04em; text-transform: uppercase;
}

/* — layout — */
.page { min-height: 100vh; background: var(--color-bg); color: var(--color-text); }
.container { max-width: 960px; margin: 0 auto; padding: var(--space-8) var(--space-8) 80px; }
.hero {
  display: grid; grid-template-columns: 1fr auto; gap: var(--space-8); align-items: end;
  padding-bottom: var(--space-6); border-bottom: 1px solid var(--color-divider);
}
.hero h1 { font-size: 52px; line-height: 1; letter-spacing: 0.01em; text-transform: uppercase; margin: 0; }
.hero p { margin: var(--space-3) 0 0; max-width: 52ch; font-size: 15px; }
.section { display: grid; gap: var(--space-8); margin-top: var(--space-8); }
.section-head { display: flex; align-items: baseline; gap: var(--space-4); margin-bottom: var(--space-4); }
.section-head .step { font-family: var(--font-heading); font-size: 13px; letter-spacing: 0.2em; color: var(--color-accent); }
.section-head h2 { margin: 0; font-size: 24px; text-transform: uppercase; letter-spacing: 0.06em; }
.section-head .rule { flex: 1; height: 1px; background: var(--color-divider); }

/* — dropzone — */
.dropzone {
  position: relative; padding: var(--space-8); display: grid; gap: var(--space-6);
  justify-items: center; text-align: center;
}
.dropzone.dragging { background: var(--color-accent-100); border-color: var(--color-accent); }
.dropzone-title { font-family: var(--font-heading); font-size: 22px; text-transform: uppercase; letter-spacing: 0.05em; }
.dropzone svg { color: var(--color-accent); }

/* — format cards — */
.format-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.format-card {
  text-align: left; padding: var(--space-4); background: transparent; cursor: pointer;
  font-family: var(--font-body); color: inherit; width: 100%;
}
.format-card .name { font-family: var(--font-heading); font-size: 20px; text-transform: uppercase; letter-spacing: 0.06em; }
.format-card .desc { font-size: 12.5px; line-height: 1.4; }

.opt-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); align-items: start; }
.opt-check { display: flex; gap: var(--space-3); align-items: flex-start; font-size: 14px; cursor: pointer; }
.opt-check span > span { display: block; font-size: 12px; }

/* — progress — */
.progress-bar { height: 8px; background: var(--color-neutral-200); border: 1px solid var(--color-divider); }
.progress-fill { height: 100%; background: var(--color-accent); width: 0%; transition: width 0.15s ease; }
.progress-meta { display: flex; justify-content: space-between; margin-top: var(--space-2); font-size: 12.5px; letter-spacing: 0.1em; text-transform: uppercase; }

/* — result panel — */
.result-panel { margin-top: var(--space-8); padding: var(--space-6); display: grid; gap: var(--space-4); }
.result-panel h3 { margin: 0; font-size: 26px; text-transform: uppercase; letter-spacing: 0.05em; }