/* ============================================================================
   LogisztikaPlusz Raktártervező — "Engineering Blueprint" design system
   Aesthetic: CAD drafting document × modern logistics ops.
   Type: Archivo (display) · IBM Plex Sans (body) · IBM Plex Mono (technical)
   ========================================================================== */

:root {
  /* Blueprint palette */
  --navy-900: #07142b;
  --navy-800: #0a1d3d;
  --navy-700: #0e2a55;
  --blueprint: #103a6e;
  --steel: #2c6ca3;
  --steel-300: #6fa3cf;
  --cyan-line: rgba(120, 190, 255, 0.22);   /* blueprint grid on dark */
  --ink: #0b2038;                            /* text on light */
  --ink-soft: #355074;
  --paper: #e8f0f9;                          /* cool blueprint paper */
  --paper-2: #dbe7f4;
  --paper-line: rgba(20, 70, 130, 0.10);     /* grid on light */
  --amber: #f5a623;                          /* hi-vis logistics accent */
  --amber-deep: #e8761a;
  --good: #2fa46a;
  --bad: #d8503f;
  --white: #f7fbff;

  --maxw: 1180px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius: 4px;                             /* drafting = sharp corners */

  --font-display: "Archivo", "Archivo Expanded", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", ui-monospace, monospace;

  --shadow-card: 0 1px 0 rgba(255,255,255,.6) inset, 0 10px 30px -12px rgba(11,32,56,.28);
}

/* ----------------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* ----------------------------------------------------------- blueprint bg */
.bp-grid {
  background-image:
    linear-gradient(var(--paper-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-line) 1px, transparent 1px);
  background-size: 28px 28px;
}
.bp-grid-dark {
  background-color: var(--navy-900);
  background-image:
    linear-gradient(var(--cyan-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--cyan-line) 1px, transparent 1px),
    radial-gradient(circle at 70% 18%, rgba(45,108,163,.35), transparent 55%);
  background-size: 32px 32px, 32px 32px, 100% 100%;
}

/* ----------------------------------------------------------------- type */
h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.02;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--steel);
  font-weight: 500;
}
.mono { font-family: var(--font-mono); }
.amber { color: var(--amber-deep); }

/* ----------------------------------------------------------------- layout */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
section { position: relative; padding-block: clamp(64px, 9vw, 130px); }
.section-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 42px; flex-wrap: wrap; }
.section-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--amber-deep);
  border: 1px solid var(--amber);
  border-radius: 2px;
  padding: 3px 8px;
  letter-spacing: .1em;
  white-space: nowrap;
}
.section-head h2 { font-size: clamp(28px, 4.4vw, 50px); }
.section-head .sub { color: var(--ink-soft); max-width: 60ch; margin-top: 10px; }

/* dark section variant */
.dark { background: var(--navy-900); color: var(--paper); }
.dark .section-head h2 { color: var(--white); }
.dark .eyebrow { color: var(--steel-300); }
.dark .section-num { color: var(--amber); }
.dark .sub, .dark p { color: #aebfd6; }

/* ----------------------------------------------------------------- nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px var(--gutter);
  background: rgba(7,20,43,.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(120,190,255,.16);
  color: var(--paper);
}
.nav .brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; letter-spacing: .02em; }
.nav .brand b { color: var(--amber); }
.nav .brand small { font-family: var(--font-mono); font-weight: 400; font-size: 11px; letter-spacing:.18em; color: var(--steel-300); text-transform: uppercase; }
.nav ul { list-style: none; display: flex; gap: 4px; padding: 0; }
.nav ul a {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em;
  padding: 7px 10px; border-radius: 3px; color: #cfe0f4; transition: .2s;
}
.nav ul a:hover, .nav ul a.active { background: rgba(245,166,35,.16); color: #fff; }
@media (max-width: 900px){ .nav ul { display: none; } }

/* ----------------------------------------------------------------- hero */
.hero { min-height: 100svh; display: grid; align-content: center; color: var(--paper); overflow: hidden; padding-top: 70px; }
.hero .kicker { display:flex; gap:14px; align-items:center; margin-bottom: 22px; }
.hero h1 { font-size: clamp(40px, 8.2vw, 104px); color: var(--white); }
.hero h1 .line { display: block; overflow: hidden; }
.hero h1 .line > span { display: inline-block; transform: translateY(110%); animation: rise .9s cubic-bezier(.2,.8,.2,1) forwards; }
.hero h1 .line:nth-child(2) > span { animation-delay: .12s; }
.hero h1 em { font-style: normal; color: var(--amber); }
.hero .lede { max-width: 56ch; color: #b9cae2; margin-top: 24px; font-size: clamp(16px,2vw,20px); opacity:0; animation: fade .8s .5s forwards; }
.hero .meta-row { display: flex; flex-wrap: wrap; gap: 28px 46px; margin-top: 48px; opacity:0; animation: fade .8s .7s forwards; }
.hero .meta-row .m { font-family: var(--font-mono); font-size: 13px; }
.hero .meta-row .m span { display:block; color: var(--steel-300); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 4px; }
.hero .meta-row .m b { color: var(--white); font-weight: 600; font-size: 15px; }
.hero .scroll-cue { position:absolute; bottom: 26px; left: 50%; transform: translateX(-50%); font-family: var(--font-mono); font-size: 11px; letter-spacing:.2em; color: var(--steel-300); text-transform: uppercase; opacity:0; animation: fade 1s 1.1s forwards; }
.hero .scroll-cue::after { content:""; display:block; width:1px; height:34px; margin: 8px auto 0; background: linear-gradient(var(--amber), transparent); animation: cue 1.8s ease-in-out infinite; }

/* hero stat chips (big engineering numerals) */
.hero-stats { display:flex; flex-wrap:wrap; gap: 14px; margin-top: 40px; opacity:0; animation: fade .8s .9s forwards; }
.hero-stats .chip { border:1px solid rgba(120,190,255,.25); border-radius: var(--radius); padding: 14px 18px; background: rgba(10,29,61,.5); }
.hero-stats .chip b { font-family: var(--font-display); font-size: 30px; color: var(--amber); display:block; line-height:1; }
.hero-stats .chip span { font-family: var(--font-mono); font-size: 11px; letter-spacing:.12em; text-transform: uppercase; color:#9fb6d4; }

/* ----------------------------------------------------------- dimension line */
.dimline { position: relative; height: 1px; background: var(--steel); margin: 6px 0; }
.dimline::before, .dimline::after { content:""; position:absolute; top:-4px; width:1px; height:9px; background: var(--steel); }
.dimline::before { left:0; } .dimline::after { right:0; }
.dimline .val { position:absolute; top:-22px; left:50%; transform:translateX(-50%); font-family:var(--font-mono); font-size:11px; color:var(--steel); background:var(--paper); padding:0 6px; }

/* ----------------------------------------------------------------- cards */
.cards { display:grid; grid-template-columns: repeat(auto-fill, minmax(190px,1fr)); gap: 14px; }
.card {
  background: var(--white); border: 1px solid rgba(20,70,130,.14);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow-card);
  position: relative;
}
.card .k { font-family: var(--font-mono); font-size: 11px; letter-spacing:.12em; text-transform: uppercase; color: var(--steel); }
.card .v { font-family: var(--font-display); font-size: 30px; font-weight: 800; color: var(--ink); margin-top: 6px; line-height: 1; }
.card .u { font-family: var(--font-mono); font-size: 12px; color: var(--ink-soft); }
.card.corner::after { content:""; position:absolute; top:7px; right:7px; width:7px; height:7px; border-top:2px solid var(--amber); border-right:2px solid var(--amber); }

/* big stat block */
.statgrid { display:grid; grid-template-columns: repeat(auto-fit,minmax(160px,1fr)); gap: 1px; background: rgba(20,70,130,.16); border:1px solid rgba(20,70,130,.16); border-radius: var(--radius); overflow:hidden; }
.statgrid .s { background: var(--white); padding: 22px 20px; }
.dark .statgrid { background: rgba(120,190,255,.16); border-color: rgba(120,190,255,.16); }
.dark .statgrid .s { background: var(--navy-800); }
.statgrid .s b { font-family: var(--font-display); font-weight:800; font-size: clamp(30px,5vw,46px); display:block; line-height:1; color: var(--ink); }
.dark .statgrid .s b { color: var(--white); }
.statgrid .s b.hi { color: var(--amber-deep); }
.dark .statgrid .s b.hi { color: var(--amber); }
.statgrid .s span { font-family: var(--font-mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase; color: var(--steel); }

/* ----------------------------------------------------------------- buttons */
.btnrow { display:flex; flex-wrap:wrap; gap: 10px; }
.btn {
  font-family: var(--font-mono); font-size: 13px; letter-spacing:.04em;
  padding: 10px 16px; border-radius: 3px; border: 1px solid var(--steel);
  background: transparent; color: var(--steel); transition: .18s; display:inline-flex; align-items:center; gap:8px;
}
.btn:hover { border-color: var(--amber); color: var(--amber-deep); }
.btn.active { background: var(--amber); border-color: var(--amber); color: var(--navy-900); font-weight: 600; }
.dark .btn { color: var(--steel-300); border-color: var(--steel); }
.dark .btn:hover { color: var(--white); border-color: var(--amber); }
.dark .btn.active { background: var(--amber); color: var(--navy-900); border-color: var(--amber); }

/* ----------------------------------------------------------- 2D / 3D stage */
.stage { border:1px solid rgba(20,70,130,.16); border-radius: var(--radius); background: var(--white); overflow:hidden; }
.dark .stage { border-color: rgba(120,190,255,.18); background: var(--navy-800); }
.plan-wrap { width:100%; }
.plan-wrap svg { width:100%; height:auto; }

.scene-host { position: relative; width:100%; height: min(74vh, 680px); background: radial-gradient(circle at 50% 0%, #12305c, var(--navy-900)); }
.scene-host canvas { width:100% !important; height:100% !important; }
.scene-ui { position:absolute; inset:0; pointer-events:none; }
.scene-ui .tl { position:absolute; top:14px; left:14px; pointer-events:auto; display:flex; flex-direction:column; gap:8px; }
.scene-ui .tr { position:absolute; top:14px; right:14px; pointer-events:auto; display:flex; flex-direction:column; gap:6px; align-items:flex-end; }
.scene-ui .bl { position:absolute; left:14px; bottom:14px; pointer-events:auto; display:flex; gap:8px; flex-wrap:wrap; }
.toggle { font-family:var(--font-mono); font-size:12px; color:#cfe0f4; display:flex; align-items:center; gap:7px; background:rgba(7,20,43,.6); padding:6px 9px; border:1px solid rgba(120,190,255,.2); border-radius:3px; }
.toggle input { accent-color: var(--amber); }
.counter { font-family:var(--font-display); font-weight:800; font-size: 40px; color: var(--amber); line-height:1; text-shadow: 0 2px 12px rgba(0,0,0,.4); }
.counter span { font-family:var(--font-mono); font-size:12px; color:#cfe0f4; display:block; letter-spacing:.14em; text-transform:uppercase; font-weight:400; }
.inspect { font-family:var(--font-mono); font-size:12px; color:#eaf3ff; background:rgba(7,20,43,.82); border:1px solid var(--amber); border-radius:3px; padding:10px 12px; max-width:240px; }
.inspect b { color: var(--amber); }
.scene-hint { font-family:var(--font-mono); font-size:11px; color:#8fa8c8; letter-spacing:.06em; }

/* ----------------------------------------------------------- calc steps */
.calc-tabs { margin-bottom: 22px; }
.calc-cols { display:grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 820px){ .calc-cols { grid-template-columns: 1fr; } .calc-cols, .cmp-row { gap: 14px; } }
.calc-panel { border:1px solid rgba(20,70,130,.16); border-radius:var(--radius); background:var(--white); overflow:hidden; }
.calc-panel > h3 { font-family:var(--font-display); font-size:18px; padding:16px 18px; border-bottom:1px solid rgba(20,70,130,.12); background:var(--paper-2); display:flex; justify-content:space-between; align-items:baseline; }
.calc-panel > h3 .res { font-family:var(--font-mono); font-size:20px; color: var(--amber-deep); font-weight:600; }
.step { padding: 14px 18px; border-bottom: 1px solid rgba(20,70,130,.08); display:grid; grid-template-columns: 26px 1fr; gap: 12px; }
.step:last-child { border-bottom: 0; }
.step .n { font-family:var(--font-mono); font-size:12px; color:#fff; background:var(--steel); width:24px;height:24px; display:grid;place-items:center;border-radius:3px; }
.step .lbl { font-weight:600; font-size:15px; }
.step .frm { font-family:var(--font-mono); font-size:13.5px; color:var(--blueprint); background:var(--paper); border-left:3px solid var(--amber); padding:7px 10px; border-radius:0 3px 3px 0; margin:7px 0; overflow-x:auto; }
.step .frm .eq { color: var(--amber-deep); font-weight:600; }
.step .exp { font-size:13.5px; color: var(--ink-soft); }

/* ----------------------------------------------------------- charts / compare */
.chart-row { display:grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 22px; align-items:start; }
.donut-card { text-align:center; border:1px solid rgba(120,190,255,.18); border-radius:var(--radius); padding: 22px; background: var(--navy-800); }
.donut-card h3 { font-family:var(--font-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--steel-300); margin-bottom: 12px; }
.donut-card .cap { font-family:var(--font-mono); font-size:12px; color:#9fb6d4; margin-top: 10px; }
.cmp-row { display:grid; grid-template-columns: 1fr; gap: 18px; }
.cmp-card { border:1px solid rgba(120,190,255,.18); border-radius:var(--radius); padding: 22px; background: var(--navy-800); }
.cmp-card h3 { font-family:var(--font-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--steel-300); margin-bottom: 16px; }

/* ----------------------------------------------------------- callout / note */
.note { border:1px solid var(--amber); border-radius:var(--radius); background: linear-gradient(180deg, rgba(245,166,35,.10), rgba(245,166,35,.02)); padding: 20px 22px; }
.note .tag { font-family:var(--font-mono); font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--amber-deep); }
.dark .note { background: rgba(245,166,35,.08); }
.dark .note .tag { color: var(--amber); }

.flow { display:grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: 0; counter-reset: f; }
.flow .stepbox { position:relative; padding: 22px; border:1px solid rgba(120,190,255,.18); }
.flow .stepbox + .stepbox { border-left: 0; }
.flow .stepbox .badge { font-family:var(--font-mono); font-size:12px; color:var(--amber); }
.flow .stepbox h4 { font-family:var(--font-display); font-size: 19px; margin: 8px 0; color: var(--white); }
.flow .stepbox p { font-size: 14px; }
.flow .stepbox .big { font-family:var(--font-display); font-weight:800; font-size: 34px; color: var(--amber); }
@media (max-width: 820px){ .flow .stepbox + .stepbox { border-left:1px solid rgba(120,190,255,.18); border-top:0; } }

/* ----------------------------------------------------------- prose / lists */
.prose p { margin-bottom: 14px; max-width: 70ch; }
.tick { list-style:none; padding:0; display:grid; gap:10px; }
.tick li { padding-left: 26px; position:relative; max-width: 72ch; }
.tick li::before { content:"→"; position:absolute; left:0; color: var(--amber-deep); font-family:var(--font-mono); }
.dark .tick li::before { color: var(--amber); }

/* sources */
.src { font-family:var(--font-mono); font-size: 12.5px; color:#9fb6d4; display:grid; gap:8px; list-style:none; padding:0; }
.src li { padding-left: 18px; position:relative; }
.src li::before { content:"§"; position:absolute; left:0; color: var(--steel-300); }

footer { background: var(--navy-900); color:#8fa8c8; padding: 40px var(--gutter); font-family:var(--font-mono); font-size:12px; text-align:center; border-top:1px solid rgba(120,190,255,.14); }
footer b { color: var(--amber); }

/* ----------------------------------------------------------- animations */
@keyframes rise { to { transform: translateY(0); } }
@keyframes fade { to { opacity: 1; } }
@keyframes cue { 0%,100%{ transform: scaleY(.4); opacity:.4 } 50%{ transform: scaleY(1); opacity:1 } }
.reveal { opacity:0; transform: translateY(22px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity:1; transform:none; }
.reveal.d1 { transition-delay:.08s } .reveal.d2 { transition-delay:.16s } .reveal.d3 { transition-delay:.24s }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity:1; transform:none; }
  .hero h1 .line > span { transform:none; }
  .hero .lede, .hero .meta-row, .hero-stats, .hero .scroll-cue { opacity:1; }
}