/* ==========================================================================
   IndustrCons Engineering Map — Design Tokens & Base
   Visual direction: technical drawing / blueprint, drafted not decorated.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  /* ---- Palette (blueprint / drafting-paper) ---- */
  --ink:            #16232B;
  --ink-soft:       #3A4A54;
  --paper:          #EEF2F1;
  --paper-raised:   #FFFFFF;
  --paper-sunken:   #E4E9E8;
  --line:           #CBD5D8;
  --line-strong:    #A8B6BA;

  --blue:           #2B6CB0;
  --blue-cyan:      #3FA7D6;
  --orange:         #E8590C;
  --amber:          #B08900;
  --green:          #2F9E44;
  --teal:           #0E7C7B;

  --muted:          #5C6B73;

  /* dark (blueprint sheet) */
  --dk-paper:       #0B1E2D;
  --dk-panel:       #122C40;
  --dk-panel-raised:#173650;
  --dk-line:        rgba(93, 168, 214, 0.18);
  --dk-line-strong: rgba(93, 168, 214, 0.32);
  --dk-ink:         #E7F0F5;
  --dk-muted:       #8FADC2;
  --dk-cyan:        #5DC8EE;

  /* semantic (light default) */
  --bg:             var(--paper);
  --bg-raised:      var(--paper-raised);
  --bg-sunken:      var(--paper-sunken);
  --fg:             var(--ink);
  --fg-muted:       var(--muted);
  --border:         var(--line);
  --border-strong:  var(--line-strong);
  --accent:         var(--orange);
  --accent-ink:     #FFFFFF;
  --focus:          var(--blue);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', monospace;

  --shadow-sm: 0 1px 2px rgba(22,35,43,0.08);
  --shadow-md: 0 6px 20px rgba(22,35,43,0.14);
  --shadow-lg: 0 16px 40px rgba(22,35,43,0.22);

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"]{
  --bg:             var(--dk-paper);
  --bg-raised:      var(--dk-panel);
  --bg-sunken:      #0E2334;
  --fg:             var(--dk-ink);
  --fg-muted:       var(--dk-muted);
  --border:         var(--dk-line);
  --border-strong:  var(--dk-line-strong);
  --accent:         var(--orange);
  --accent-ink:     #16110C;
  --focus:          var(--dk-cyan);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.35);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.45);
  --shadow-lg: 0 20px 50px rgba(0,0,0,0.55);
}

*, *::before, *::after{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s var(--ease), color .25s var(--ease);
}
h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0 0 .4em;
  letter-spacing: -0.01em;
}
p{ margin: 0 0 1em; line-height: 1.55; color: var(--fg); }
a{ color: inherit; }
button{ font-family: var(--font-body); }
img{ max-width: 100%; display: block; }
ul{ margin: 0; padding: 0; list-style: none; }

::selection{ background: var(--accent); color: var(--accent-ink); }

/* Focus visibility — never remove outlines, only restyle them */
:focus-visible{
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* ---- Blueprint grid texture, used as a background utility ---- */
.blueprint-grid{
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
}

/* ---- Corner survey ticks — signature device used on panels/cards ---- */
.tick-frame{ position: relative; }
.tick-frame::before, .tick-frame::after{
  content: "";
  position: absolute;
  width: 10px; height: 10px;
  border-color: var(--border-strong);
  border-style: solid;
  pointer-events: none;
}
.tick-frame::before{ top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.tick-frame::after{ bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

.mono{ font-family: var(--font-mono); }
.eyebrow{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.visually-hidden{
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link{
  position: absolute; left: 8px; top: -48px;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 14px; border-radius: var(--radius-sm);
  z-index: 999; transition: top .2s var(--ease);
  font-weight: 600; font-size: 13px;
}
.skip-link:focus{ top: 8px; }

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Scrollbar (blueprint styling, webkit only — degrades gracefully) */
::-webkit-scrollbar{ width: 10px; height: 10px; }
::-webkit-scrollbar-track{ background: transparent; }
::-webkit-scrollbar-thumb{ background: var(--border-strong); border-radius: 6px; }