/* ==========================================================================
   SHIELDIO — style.css
   Barevná paleta je rozdělená na dvě role, ať se nepere:
   1) --accent-*  = jediná "brandová" akční barva (tlačítka, odkazy, CTA)
   2) --tier-*    = barvy úrovní Zelená/Žlutá/Červená — používají se JEN
                     u prvků, které se skutečně váží k dané úrovni desky
   ========================================================================== */

:root{
  /* povrchy */
  --paper:#f2f3ee;
  --paper-2:#e9ebe3;
  --line:#c7cabf;

  /* text */
  --ink:#131d17;
  --ink-soft:#3c483f;

  /* tmavé sekce (hero, CTA, patička) */
  --navy:#0f1a15;
  --navy-2:#16241d;

  /* jediná brand akční barva (odkazy, tlačítka, zvýraznění) */
  --accent:#b5713c;
  --accent-soft:#d8a066;
  --accent-deep:#8f5a2e;

  /* barvy úrovní baseline — POUZE pro tier karty / štítky / logo-mark */
  --tier-green:#16b548;
  --tier-green-deep:#076e1f;
  --tier-yellow:#ffba19;
  --tier-yellow-deep:#bf8208;
  --tier-red:#f72338;
  --tier-red-deep:#a31212;

  --radius:14px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans', sans-serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{
  font-family:'IBM Plex Sans Condensed', sans-serif;
  font-weight:700;
  letter-spacing:-0.01em;
  margin:0;
  color:var(--ink);
}
.mono{ font-family:'IBM Plex Mono', monospace; letter-spacing:0.02em; }
a{ color:inherit; }
img{ max-width:100%; display:block; }
.wrap{ max-width:1180px; margin:0 auto; padding:0 32px; }
@media (max-width:640px){ .wrap{ padding:0 20px; } }

/* ---------- top bar ---------- */
.topbar{
  position:sticky; top:0; z-index:50;
  background:rgba(242,243,238,0.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 32px; max-width:1180px; margin:0 auto;
}
.logo{
  display:flex; align-items:center; gap:10px;
  font-family:'IBM Plex Sans Condensed'; font-weight:700; font-size:20px;
}
.logo-mark{
  width:14px; height:14px; border-radius:3px;
  background:conic-gradient(var(--tier-green) 0 33%, var(--tier-yellow) 33% 66%, var(--tier-red) 66% 100%);
  box-shadow:0 0 0 2px var(--paper), 0 0 0 3px var(--ink);
}
.topbar nav{ display:flex; gap:28px; font-size:14.5px; font-weight:500; }
.topbar nav a{ text-decoration:none; color:var(--ink-soft); transition:color .15s; }
.topbar nav a:hover{ color:var(--ink); }
.topbar .cta-small{
  background:var(--ink); color:var(--paper);
  padding:9px 18px; border-radius:8px; font-size:14px; font-weight:600;
  text-decoration:none; white-space:nowrap;
}
.nav-links{ display:flex; align-items:center; gap:28px; }
@media (max-width:800px){ .topbar nav{ display:none; } }

/* ---------- hero ---------- */
.hero{
  background:
    radial-gradient(1100px 500px at 78% -10%, rgba(181,113,60,0.16), transparent 60%),
    var(--navy);
  color:#eef1ec;
  position:relative;
  overflow:hidden;
  padding:76px 0 0;
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image:linear-gradient(to bottom, black, transparent 75%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid; grid-template-columns:1.05fr 0.95fr;
  gap:40px; align-items:center; padding-bottom:40px;
}
@media (max-width:900px){ .hero-grid{ grid-template-columns:1fr; padding-bottom:0; } }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:'IBM Plex Mono'; font-size:12.5px; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--accent-soft);
  border:1px solid rgba(216,160,102,0.35);
  padding:6px 12px; border-radius:100px; margin-bottom:22px;
}
.eyebrow::before{ content:"●"; font-size:8px; color:var(--tier-green); }

.hero h1{
  font-size:clamp(34px, 4.6vw, 54px);
  line-height:1.06; color:#fff; max-width:640px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(180deg, transparent 62%, rgba(181,113,60,0.55) 62%);
}
.hero p.lead{ margin-top:22px; font-size:17.5px; max-width:520px; color:#c4cdc4; }
.hero-ctas{ display:flex; gap:14px; margin-top:32px; flex-wrap:wrap; }
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 24px; border-radius:9px;
  font-weight:600; font-size:15px; text-decoration:none;
  border:1px solid transparent; cursor:pointer;
  transition:transform .12s ease, opacity .12s ease;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--accent); color:#fff; }
.btn-primary:hover{ background:var(--accent-deep); }
.btn-ghost{ border-color:rgba(255,255,255,0.25); color:#eef1ec; }
.btn-ghost:hover{ border-color:rgba(255,255,255,0.5); }

.hero-stats{
  display:flex; gap:28px; margin-top:44px; padding-top:26px;
  border-top:1px solid rgba(255,255,255,0.12);
  max-width:560px; flex-wrap:wrap;
}
.stat b{ display:block; font-family:'IBM Plex Sans Condensed'; font-size:24px; color:#fff; }
.stat span{ font-size:12.5px; color:#9aa79c; }

/* ---------- hero board photo ---------- */
.board-figure{ position:relative; }
.board-photo-frame{
  position:relative; border-radius:16px; overflow:hidden;
  border:1px solid rgba(255,255,255,0.12);
  box-shadow:0 30px 60px -20px rgba(0,0,0,0.55);
}
.board-photo-frame img{ width:100%; display:block; }
.board-tag{
  position:absolute; top:14px; left:14px;
  background:var(--tier-red); color:#fff;
  font-family:'IBM Plex Mono'; font-size:11.5px; font-weight:600;
  padding:5px 10px; border-radius:5px; letter-spacing:0.03em;
}
.callout-note{
  margin-top:14px; font-family:'IBM Plex Mono'; font-size:12px;
  color:#8fa190; text-align:right;
}

/* ---------- section shell ---------- */
section{ padding:88px 0; }
.section-head{ max-width:620px; margin-bottom:52px; }
.section-head .eyebrow-dark{
  font-family:'IBM Plex Mono'; font-size:12.5px; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--accent); margin-bottom:14px; display:block;
}
.section-head h2{ font-size:clamp(26px,3.2vw,38px); line-height:1.15; }
.section-head p{ margin-top:16px; color:var(--ink-soft); font-size:16px; max-width:540px; }

/* ---------- problem strip ---------- */
.problem{ background:var(--paper-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.problem-grid{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--line); border:1px solid var(--line); border-radius:12px; overflow:hidden;
}
@media (max-width:800px){ .problem-grid{ grid-template-columns:1fr; } }
.problem-card{ background:var(--paper-2); padding:30px 28px; }
.problem-card .mono-tag{
  font-family:'IBM Plex Mono'; font-size:12px; color:var(--accent); margin-bottom:14px; display:block;
}
.problem-card h3{ font-size:18px; margin-bottom:10px; }
.problem-card p{ color:var(--ink-soft); font-size:14.5px; margin:0; }

/* ---------- tiers ---------- */
.tiers{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
@media (max-width:900px){ .tiers{ grid-template-columns:1fr; } }
.tier-card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  padding:28px; position:relative; display:flex; flex-direction:column;
}
.tier-card .bar{
  position:absolute; top:0; left:0; right:0; height:6px;
  border-radius:var(--radius) var(--radius) 0 0;
}
.tier-green .bar{ background:var(--tier-green); }
.tier-yellow .bar{ background:var(--tier-yellow); }
.tier-red .bar{ background:var(--tier-red); }
.tier-label{
  font-family:'IBM Plex Mono'; font-size:12px; letter-spacing:0.05em; text-transform:uppercase;
  margin-top:6px;
}
.tier-green .tier-label{ color:var(--tier-green-deep); }
.tier-yellow .tier-label{ color:var(--tier-yellow-deep); }
.tier-red .tier-label{ color:var(--tier-red-deep); }
.tier-card h3{ font-size:22px; margin-top:8px; }
.tier-card .tier-sub{ color:var(--ink-soft); font-size:14px; margin-top:6px; }
.tier-list{ list-style:none; padding:0; margin:20px 0 0; flex:1; }
.tier-list li{
  font-size:14px; padding:8px 0; border-top:1px solid var(--paper-2);
  display:flex; gap:10px; align-items:flex-start; color:var(--ink);
}
.tier-list li:first-child{ border-top:none; }
.tier-list li::before{ content:"—"; color:var(--ink-soft); flex-shrink:0; }
.dev-badge{
  display:inline-flex; align-items:center; gap:6px; margin-top:18px;
  font-family:'IBM Plex Mono'; font-size:11.5px; font-weight:600;
  color:var(--tier-red-deep); background:rgba(214,80,61,0.09);
  border:1px solid rgba(214,80,61,0.3);
  padding:6px 10px; border-radius:100px; width:fit-content;
}
.dev-badge::before{ content:"●"; font-size:8px; }

/* ---------- red board deep-dive ---------- */
.deepdive{ background:var(--navy); color:#e7ece6; }
.deepdive .section-head p{ color:#a9b6ac; }
.deepdive .section-head .eyebrow-dark{ color:var(--accent-soft); }
.deepdive-grid{ display:grid; grid-template-columns:1fr 1fr; gap:44px; align-items:center; }
@media (max-width:900px){ .deepdive-grid{ grid-template-columns:1fr; } }
.deepdive-photos{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.deepdive-photos img{ border-radius:12px; border:1px solid rgba(255,255,255,0.1); }
.spec-list{ list-style:none; margin:26px 0 0; padding:0; }
.spec-list li{
  display:grid; grid-template-columns:120px 1fr; gap:16px;
  padding:13px 0; border-top:1px solid rgba(255,255,255,0.1); font-size:14.5px;
}
.spec-list li:first-child{ border-top:none; }
.spec-list b{ font-family:'IBM Plex Mono'; font-size:12.5px; color:var(--accent-soft); font-weight:600; }
.spec-list span{ color:#cfd8d1; }

/* ---------- how it works ---------- */
.steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; border-top:1px solid var(--line); }
@media (max-width:900px){ .steps{ grid-template-columns:1fr; } }
.step{ padding:30px 26px 30px 0; border-bottom:1px solid var(--line); position:relative; }
.steps .step:not(:last-child){ border-right:1px solid var(--line); }
@media (max-width:900px){ .steps .step:not(:last-child){ border-right:none; } }
.step-num{
  font-family:'IBM Plex Mono'; font-size:13px; color:var(--accent);
  display:flex; align-items:center; gap:8px; margin-bottom:16px;
}
.step-num::before{ content:""; width:20px; height:1px; background:var(--accent); }
.step h3{ font-size:17px; margin-bottom:8px; }
.step p{ color:var(--ink-soft); font-size:14px; margin:0; }

/* ---------- for schools ---------- */
.benefits{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
@media (max-width:900px){ .benefits{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .benefits{ grid-template-columns:1fr; } }
.benefit{ background:#fff; border:1px solid var(--line); border-radius:12px; padding:24px; }
.benefit-icon{
  width:34px; height:34px; border-radius:8px;
  background:var(--paper-2); border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
  font-family:'IBM Plex Mono'; font-weight:600; color:var(--accent);
  margin-bottom:14px; font-size:14px;
}
.benefit h3{ font-size:15.5px; margin-bottom:8px; }
.benefit p{ font-size:13.5px; color:var(--ink-soft); margin:0; }

/* ---------- CTA / contact ---------- */
.cta-section{
  background:var(--navy-2); color:#eef1ec;
  border-top:6px solid;
  border-image:linear-gradient(90deg,var(--tier-green),var(--tier-yellow),var(--tier-red)) 1;
}
.cta-grid{ display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start; }
@media (max-width:900px){ .cta-grid{ grid-template-columns:1fr; } }
.cta-grid h2{ color:#fff; font-size:clamp(26px,3vw,34px); }
.cta-grid p{ color:#a9b6ac; margin-top:16px; font-size:15.5px; max-width:440px; }
.contact-list{ list-style:none; padding:0; margin:28px 0 0; }
.contact-list li{
  padding:12px 0; border-top:1px solid rgba(255,255,255,0.1); font-size:14.5px; display:flex; gap:12px;
}
.contact-list li:first-child{ border-top:none; }
.contact-list b{ color:var(--accent-soft); font-family:'IBM Plex Mono'; font-size:12.5px; min-width:82px; }

.form-card{ background:#fff; color:var(--ink); border-radius:14px; padding:30px; }
.form-card h3{ font-size:16px; margin-bottom:4px; }
.form-card .form-sub{ font-size:13px; color:var(--ink-soft); margin-bottom:20px; }
.field{ margin-bottom:14px; }
.field label{ display:block; font-size:12.5px; font-weight:600; margin-bottom:6px; color:var(--ink-soft); }
.field input, .field textarea{
  width:100%; padding:11px 12px; border-radius:8px; border:1px solid var(--line);
  font-family:inherit; font-size:14px; background:var(--paper); color:var(--ink);
}
.field textarea{ resize:vertical; min-height:80px; }
.form-card .btn-primary{ width:100%; justify-content:center; margin-top:6px; border:none; }

/* ---------- footer ---------- */
footer{ background:var(--navy); color:#7f8c82; padding:36px 0; }
.footer-inner{
  display:flex; justify-content:space-between; align-items:center; gap:20px; flex-wrap:wrap; font-size:13px;
}
.footer-inner .logo{ color:#e7ece6; }
.footer-note{ font-family:'IBM Plex Mono'; font-size:11.5px; }