/* ============================================================
   impetroAI — AI Akademie
   Sponsor site design system
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* Brand */
  --black: #000000;
  --navy: #07387A;
  --navy-deep: #052a5e;
  --navy-soft: #1a4d92;
  --grey-light: #F6F6F7;
  --steel: #7197AF;
  --steel-soft: #b3c5d2;
  --coral: #F48080;
  --coral-deep: #e36868;
  --near-white: #FBFBFB;
  --white: #ffffff;

  /* Type */
  --font-sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --fs-scale: 1;

  /* Spacing scale */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* Hero density (tweakable) */
  --hero-pad-y: 120px;

  /* Layout */
  --container: 1200px;
  --container-wide: 1320px;
  --radius-sm: 4px;
  --radius-md: 12px;
  --radius: 10px;
  --radius-lg: 18px;
  --border: 1px solid color-mix(in srgb, var(--steel) 28%, transparent);
  --border-strong: 1px solid color-mix(in srgb, var(--steel) 55%, transparent);

  /* Type scale (multiplied by --fs-scale) */
  --t-eyebrow: calc(13px * var(--fs-scale));
  --t-body: calc(16px * var(--fs-scale));
  --t-body-lg: calc(18px * var(--fs-scale));
  --t-lead: calc(21px * var(--fs-scale));
  --t-h6: calc(15px * var(--fs-scale));
  --t-h5: calc(20px * var(--fs-scale));
  --t-h4: calc(26px * var(--fs-scale));
  --t-h3: calc(34px * var(--fs-scale));
  --t-h2: calc(48px * var(--fs-scale));
  --t-h1: calc(72px * var(--fs-scale));
  --t-display: calc(96px * var(--fs-scale));
}

/* ---------- Reset & base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--near-white);
  color: var(--black);
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

* { font-style: normal !important; } /* brand rule: no italics, ever */

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button { font-family: inherit; cursor: pointer; }

::selection { background: var(--coral); color: var(--white); }

/* CZ/EN visibility */
html[lang="cs"] [lang="en"] { display: none !important; }
html[lang="en"] [lang="cs"] { display: none !important; }

/* ---------- Containers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--s-5);
}
.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--s-5);
}

/* ---------- Type ---------- */
.eyebrow {
  font-size: var(--t-eyebrow);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--coral);
  margin: 0 0 var(--s-5) 0;
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--coral);
}
.eyebrow.no-rule::before { display: none; }
.eyebrow.on-navy { color: var(--coral); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
  text-wrap: balance;
  color: inherit;
}
h1 { font-size: var(--t-h1); letter-spacing: -0.035em; }
h2 { font-size: var(--t-h2); letter-spacing: -0.03em; }
h3 { font-size: var(--t-h3); letter-spacing: -0.025em; }
h4 { font-size: var(--t-h4); letter-spacing: -0.02em; }
h5 { font-size: var(--t-h5); }
h6 { font-size: var(--t-h6); }

.lead {
  font-size: var(--t-lead);
  line-height: 1.5;
  color: var(--black);
  text-wrap: pretty;
  max-width: 60ch;
}
.muted { color: var(--steel); }
.coral { color: var(--coral); }
.navy { color: var(--navy); }
.mono { font-family: var(--font-mono); font-weight: 400; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  padding: 16px 26px;
  border-radius: 999px;
  font-weight: 500;
  font-size: var(--t-body);
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  text-wrap: nowrap;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--coral);
  color: var(--white);
}
.btn-primary:hover { background: var(--coral-deep); }

.btn-navy {
  background: var(--navy);
  color: var(--white);
}
.btn-navy:hover { background: var(--navy-deep); }

.btn-ghost {
  background: transparent;
  color: var(--black);
  border-color: color-mix(in srgb, var(--steel) 45%, transparent);
}
.btn-ghost:hover { border-color: var(--navy); }

.btn-ghost.on-navy {
  color: var(--white);
  border-color: color-mix(in srgb, var(--white) 35%, transparent);
}
.btn-ghost.on-navy:hover { border-color: var(--white); background: rgba(255, 255, 255, 0.06); }

.btn-sm { padding: 10px 18px; font-size: 14px; }

.btn .arrow { display: inline-block; transition: transform 0.2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Logo wordmark ---------- */
.logo {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.04em;
  font-size: 22px;
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
}
.logo .impetro { color: var(--black); }
.logo .ai { color: var(--coral); }
.logo.on-navy .impetro { color: var(--white); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--near-white) 92%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: var(--border);
}
.site-header.on-navy {
  background: color-mix(in srgb, var(--navy) 88%, transparent);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}
.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--s-6);
  padding: 18px 0;
}
.phase-nav {
  display: flex;
  gap: var(--s-6);
  justify-self: center;
  font-size: 14px;
  color: var(--black);
}
.phase-nav a {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  color: inherit;
  opacity: 0.7;
  transition: opacity 0.2s ease, color 0.2s ease;
}
.phase-nav a:hover { opacity: 1; color: var(--navy); }
.phase-nav a.active { opacity: 1; color: var(--navy); font-weight: 500; }
.phase-nav a .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--coral);
  font-weight: 500;
}
.site-header.on-navy .phase-nav a { color: rgba(255, 255, 255, 0.7); }
.site-header.on-navy .phase-nav a:hover,
.site-header.on-navy .phase-nav a.active { color: var(--white); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  justify-self: end;
}

/* Lang toggle */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  border: 1px solid color-mix(in srgb, var(--steel) 45%, transparent);
  border-radius: 999px;
  padding: 3px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-mono);
}
.site-header.on-navy .lang-toggle { border-color: rgba(255, 255, 255, 0.2); }
.lang-toggle button {
  background: transparent;
  border: 0;
  padding: 5px 11px;
  border-radius: 999px;
  color: inherit;
  cursor: pointer;
  letter-spacing: 0.04em;
  color: var(--black);
  opacity: 0.55;
  transition: opacity 0.2s ease;
}
.site-header.on-navy .lang-toggle button { color: var(--white); opacity: 0.55; }
.lang-toggle button[aria-pressed="true"] {
  background: var(--navy);
  color: var(--white);
  opacity: 1;
}
.site-header.on-navy .lang-toggle button[aria-pressed="true"] {
  background: var(--white);
  color: var(--navy);
  opacity: 1;
}

/* ---------- Section wrappers ---------- */
section { padding: var(--s-9) 0; }
section.tight { padding: var(--s-8) 0; }
section.navy { background: var(--navy); color: var(--white); }
section.grey { background: var(--grey-light); }
section.white { background: var(--white); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  margin-bottom: var(--s-8);
  max-width: 800px;
}
.section-head h2 { color: inherit; }
section.navy .section-head .lead { color: rgba(255, 255, 255, 0.85); }
section.navy .eyebrow { color: var(--coral); }

/* ---------- Coral check icon ---------- */
.check {
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: var(--coral);
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}
.check svg { width: 12px; height: 12px; }

/* ---------- Three-pillar value cards ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
}
.pillar {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.pillar:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--coral) 50%, transparent); }
.pillar .pillar-head { display: flex; align-items: center; gap: var(--s-4); }
.pillar h3 { font-size: var(--t-h4); }
.pillar p { font-size: var(--t-body-lg); line-height: 1.55; margin: 0; text-wrap: pretty; }
.pillar .pillar-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  position: absolute;
  top: 20px;
  right: 24px;
  letter-spacing: 0.06em;
}

/* ---------- Sponsor persona blocks ---------- */
.personas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
}
.persona {
  padding: 40px 36px;
  border-right: var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.persona:last-child { border-right: 0; }
.persona-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--coral);
  text-transform: uppercase;
}
.persona h3 { font-size: var(--t-h4); }
.persona p { margin: 0; font-size: var(--t-body-lg); line-height: 1.55; }

/* ---------- 5-phase progress strip ---------- */
.phase-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--s-3);
  margin: 0;
}
.phase-strip .pill {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 18px;
  border-radius: var(--radius);
  background: var(--white);
  border: var(--border);
  color: var(--black);
  position: relative;
  text-align: left;
  transition: transform 0.2s ease, border-color 0.2s ease;
  min-height: 110px;
}
.phase-strip .pill:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--navy) 35%, transparent); }
.phase-strip .pill .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--steel);
  letter-spacing: 0.08em;
}
.phase-strip .pill .name {
  font-weight: 500;
  font-size: 15px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}
.phase-strip .pill .bar {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 14px;
  height: 3px;
  border-radius: 2px;
  background: color-mix(in srgb, var(--steel) 30%, transparent);
}
.phase-strip .pill.done .bar { background: var(--navy); }
.phase-strip .pill.current { border-color: var(--coral); background: var(--white); }
.phase-strip .pill.current .bar { background: var(--coral); }
.phase-strip .pill.current .num { color: var(--coral); }

/* Style variants for phase strip */
.phase-strip[data-style="dots"] .pill {
  background: transparent;
  border: 0;
  min-height: auto;
  padding: 0 8px;
  align-items: flex-start;
}
.phase-strip[data-style="dots"] .pill .bar { display: none; }
.phase-strip[data-style="dots"] .pill::before {
  content: "";
  width: 12px; height: 12px; border-radius: 999px;
  background: color-mix(in srgb, var(--steel) 40%, transparent);
  margin-bottom: 10px;
}
.phase-strip[data-style="dots"] .pill.done::before { background: var(--navy); }
.phase-strip[data-style="dots"] .pill.current::before { background: var(--coral); transform: scale(1.4); }
.phase-strip[data-style="dots"] { position: relative; }
.phase-strip[data-style="dots"]::before {
  content: "";
  position: absolute;
  left: 5%; right: 5%;
  top: 24px;
  height: 1px;
  background: color-mix(in srgb, var(--steel) 35%, transparent);
  z-index: 0;
}
.phase-strip[data-style="dots"] .pill { z-index: 1; }

.phase-strip[data-style="numbers"] .pill {
  background: transparent;
  border: 0;
  min-height: auto;
  padding: 14px 6px 18px 6px;
  border-top: 2px solid color-mix(in srgb, var(--steel) 30%, transparent);
}
.phase-strip[data-style="numbers"] .pill .bar { display: none; }
.phase-strip[data-style="numbers"] .pill.done { border-top-color: var(--navy); }
.phase-strip[data-style="numbers"] .pill.current { border-top-color: var(--coral); }
.phase-strip[data-style="numbers"] .pill .num {
  font-size: 22px;
  color: var(--steel);
  font-weight: 500;
  letter-spacing: -0.02em;
}
.phase-strip[data-style="numbers"] .pill.done .num { color: var(--navy); }
.phase-strip[data-style="numbers"] .pill.current .num { color: var(--coral); }

/* ---------- Front-page 5-phase timeline (richer) ---------- */
.timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border-top: 1px solid color-mix(in srgb, var(--steel) 35%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--steel) 35%, transparent);
}
.timeline-step {
  padding: 36px 24px 36px 24px;
  border-right: 1px solid color-mix(in srgb, var(--steel) 25%, transparent);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  min-height: 280px;
  position: relative;
  transition: background 0.3s ease;
}
.timeline-step:last-child { border-right: 0; }
.timeline-step:hover { background: var(--grey-light); }
.timeline-step .ts-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral);
  letter-spacing: 0.08em;
}
.timeline-step h4 {
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.timeline-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: color-mix(in srgb, var(--black) 75%, transparent);
}
.timeline-step .ts-link {
  margin-top: auto;
  font-size: 14px;
  color: var(--navy);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}
.timeline-step .ts-link::after { content: "→"; transition: transform 0.2s ease; }
.timeline-step:hover .ts-link::after { transform: translateX(3px); }
.timeline-step .ts-bar {
  height: 4px;
  width: 28px;
  border-radius: 2px;
  background: var(--navy);
  margin-bottom: 4px;
}

/* ---------- Step cards (phase pages) ---------- */
.step-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
}
.step-card {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: var(--s-6);
  transition: border-color 0.2s ease;
}
.step-card:hover { border-color: color-mix(in srgb, var(--coral) 45%, transparent); }
.step-card .step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--coral);
  letter-spacing: 0.06em;
  padding-top: 6px;
}
.step-card .step-num .big {
  display: block;
  font-size: 40px;
  color: var(--navy);
  letter-spacing: -0.04em;
  font-weight: 500;
  margin-top: 2px;
  font-family: var(--font-sans);
}
.step-card h3 {
  font-size: 26px;
  letter-spacing: -0.02em;
  margin-bottom: var(--s-2);
}
.step-card .step-body { display: flex; flex-direction: column; gap: var(--s-5); }
.step-card .field {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.step-card .field-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel);
  font-weight: 500;
}
.step-card .field-body {
  font-size: var(--t-body-lg);
  line-height: 1.55;
  margin: 0;
  text-wrap: pretty;
}
.step-card .outputs {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.step-card .outputs li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  list-style: none;
  font-size: var(--t-body-lg);
  line-height: 1.5;
}
.step-card .outputs { padding: 0; margin: 0; }

/* ---------- Tangible outcomes band ---------- */
.outcomes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
}
.outcome {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  transition: background 0.2s ease, border-color 0.2s ease;
}
.outcome:hover { background: rgba(255, 255, 255, 0.07); border-color: rgba(255, 255, 255, 0.2); }
.outcome .o-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral);
  letter-spacing: 0.08em;
}
.outcome h4 {
  font-size: 19px;
  letter-spacing: -0.015em;
  color: var(--white);
  font-weight: 500;
}
.outcome p {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- Evidence cards (Teams/Loop/photo placeholders) ---------- */
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
}
.evidence {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.evidence-head {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 14px 18px;
  border-bottom: var(--border);
  background: var(--grey-light);
  font-size: 13px;
  color: var(--steel);
}
.evidence-head .dot {
  width: 8px; height: 8px; border-radius: 999px; background: var(--coral);
}
.evidence-body { padding: 22px 22px; flex: 1; }
.evidence-body p { margin: 0 0 var(--s-3) 0; font-size: 15px; line-height: 1.55; }
.evidence-body .post-meta { display: flex; gap: var(--s-3); font-size: 13px; color: var(--steel); margin-top: var(--s-4); }
.evidence.photo .evidence-body {
  padding: 0;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--navy) 90%, black) 0%, var(--navy) 60%, var(--navy-soft) 100%);
  position: relative;
  overflow: hidden;
}
.evidence.photo .photo-glow {
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(244,128,128,0.25), transparent 60%);
}
.evidence.photo .photo-caption {
  position: absolute;
  bottom: 16px; left: 18px; right: 18px;
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.04em;
  display: flex; align-items: center; gap: var(--s-3);
}
.evidence.photo .photo-caption .placeholder-icon {
  width: 32px; height: 32px; border-radius: 999px;
  background: rgba(255,255,255,0.15);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px;
}

/* ---------- 3-step collab model ---------- */
.collab {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-3);
  margin-top: var(--s-6);
}
.collab .step {
  border-top: 2px solid var(--coral);
  padding: var(--s-4) 0 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.collab .step .ord {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  letter-spacing: 0.08em;
}
.collab .step .ttl {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy);
  color: var(--white);
  padding: 80px 0 40px 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--s-7);
  padding-bottom: var(--s-7);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-grid h6 {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-bottom: var(--s-4);
  font-weight: 500;
}
.footer-grid p, .footer-grid a {
  font-size: 14px;
  line-height: 1.55;
  color: rgba(255,255,255,0.85);
  margin: 0 0 4px 0;
  display: block;
}
.footer-grid a:hover { color: var(--coral); }
.footer-grid .tagline {
  font-size: 16px;
  line-height: 1.5;
  color: rgba(255,255,255,0.75);
  max-width: 32ch;
  text-wrap: pretty;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ---------- Hero variants ---------- */
.hero { padding: var(--hero-pad-y) 0; position: relative; overflow: hidden; }
.hero.navy { background: var(--navy); color: var(--white); }
.hero .eyebrow { color: var(--coral); }

/* Variant A — quiet journey */
.hero-a .hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--s-8);
  align-items: center;
}
.hero-a h1 { color: var(--white); font-size: clamp(48px, 6vw, var(--t-h1)); text-wrap: balance; }
.hero-a .lead { color: rgba(255,255,255,0.82); margin-top: var(--s-5); max-width: 52ch; }
.hero-a .cta-row { display: flex; gap: var(--s-3); margin-top: var(--s-7); flex-wrap: wrap; }
.hero-a .journey-svg { width: 100%; }

/* Variant B — editorial split */
.hero-b { background: var(--near-white); color: var(--black); }
.hero-b .eyebrow { color: var(--coral); }
.hero-b .hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: var(--s-9);
  align-items: start;
}
.hero-b h1 {
  color: var(--navy);
  font-size: clamp(44px, 5.5vw, 80px);
}
.hero-b .lead { margin-top: var(--s-5); max-width: 48ch; }
.hero-b .cta-row { display: flex; gap: var(--s-3); margin-top: var(--s-6); flex-wrap: wrap; }
.hero-b .phases-mini {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid color-mix(in srgb, var(--steel) 35%, transparent);
}
.hero-b .phases-mini .row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: var(--s-4);
  padding: 18px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--steel) 35%, transparent);
  align-items: baseline;
  transition: color 0.2s ease;
}
.hero-b .phases-mini .row:hover { color: var(--navy); }
.hero-b .phases-mini .row .ord {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral);
  letter-spacing: 0.08em;
}
.hero-b .phases-mini .row .nm {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.hero-b .phases-mini .row .dur {
  font-size: 13px;
  color: var(--steel);
  font-family: var(--font-mono);
}

/* Variant C — bold typographic */
.hero-c { background: var(--navy); color: var(--white); padding: calc(var(--hero-pad-y) * 0.9) 0; }
.hero-c .container-wide { position: relative; }
.hero-c .eyebrow { color: var(--coral); }
.hero-c h1 {
  color: var(--white);
  font-size: clamp(56px, 8.5vw, 132px);
  line-height: 0.96;
  letter-spacing: -0.04em;
  margin-bottom: var(--s-6);
  font-weight: 600;
  text-wrap: balance;
  max-width: 16ch;
}
.hero-c h1 .accent { color: var(--coral); }
.hero-c .meta-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--s-4);
  border-top: 1px solid rgba(255,255,255,0.18);
  padding-top: var(--s-5);
  margin-top: var(--s-7);
}
.hero-c .meta-row .item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero-c .meta-row .ord {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral);
  letter-spacing: 0.08em;
}
.hero-c .meta-row .nm {
  font-size: 15px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: rgba(255,255,255,0.92);
}
.hero-c .lead-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-7);
  align-items: end;
  margin-top: var(--s-5);
}
.hero-c .lead { color: rgba(255,255,255,0.82); max-width: 52ch; }
.hero-c .cta-row { display: flex; gap: var(--s-3); justify-content: flex-end; flex-wrap: wrap; }

/* ---------- Hero variant switcher ---------- */
.hero-switcher {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  display: inline-flex;
  gap: 2px;
  padding: 4px;
  background: rgba(0, 0, 0, 0.85);
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.7);
}
.hero-switcher .label {
  padding: 6px 10px 6px 14px;
  text-transform: uppercase;
}
.hero-switcher button {
  background: transparent;
  border: 0;
  color: rgba(255,255,255,0.6);
  padding: 6px 14px;
  border-radius: 999px;
  font-family: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  cursor: pointer;
  text-transform: uppercase;
}
.hero-switcher button[aria-pressed="true"] {
  background: var(--coral);
  color: var(--white);
}

/* ---------- Phase page header ---------- */
.phase-hero {
  background: var(--navy);
  color: var(--white);
  padding: 100px 0 80px 0;
}
.phase-hero .eyebrow { color: var(--coral); }
.phase-hero h1 {
  color: var(--white);
  font-size: clamp(48px, 6vw, var(--t-h1));
  letter-spacing: -0.04em;
  margin-bottom: var(--s-5);
}
.phase-hero .phase-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--coral);
  letter-spacing: 0.1em;
  margin-bottom: var(--s-5);
  display: flex;
  align-items: center;
  gap: var(--s-3);
}
.phase-hero .phase-num::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(255,255,255,0.18);
  max-width: 240px;
}
.phase-hero .purpose {
  font-size: var(--t-lead);
  color: rgba(255,255,255,0.85);
  max-width: 60ch;
  text-wrap: pretty;
}

.phase-strip-section {
  padding: var(--s-6) 0;
  border-bottom: var(--border);
  background: var(--near-white);
}

.phase-intro {
  padding: var(--s-9) 0 var(--s-7) 0;
}
.phase-intro .intro-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--s-8);
  align-items: start;
}
.phase-intro h2 {
  font-size: var(--t-h3);
  color: var(--navy);
  letter-spacing: -0.02em;
}
.phase-intro .intro-body p {
  font-size: var(--t-lead);
  line-height: 1.5;
  margin: 0;
  text-wrap: pretty;
}

/* prev/next phase nav */
.phase-nav-foot {
  border-top: var(--border);
  padding: var(--s-7) 0;
  background: var(--white);
}
.phase-nav-foot .pnf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-6);
}
.phase-nav-foot a {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding: 24px 0;
  border: var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.phase-nav-foot a:hover { border-color: var(--coral); transform: translateY(-2px); }
.phase-nav-foot .pnf-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  letter-spacing: 0.08em;
}
.phase-nav-foot .pnf-name {
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--navy);
}
.phase-nav-foot .pnf-name .ord { color: var(--coral); margin-right: 8px; font-family: var(--font-mono); font-size: 14px; }
.phase-nav-foot .right { text-align: right; }
.phase-nav-foot a:only-child { grid-column: 2; }

/* ---------- Page TOC (front page / Úvod) ---------- */
.page-toc {
  background: var(--white);
  border-bottom: var(--border);
  padding: var(--s-6) 0;
}
.page-toc .toc-inner {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--s-6);
  align-items: start;
}
.page-toc .toc-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--coral);
  padding-top: 10px;
}
.page-toc .toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px 20px;
}
.page-toc .toc-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 14px;
  border: var(--border);
  border-radius: var(--radius-md);
  color: var(--navy);
  background: var(--white);
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
  text-decoration: none;
}
.page-toc .toc-list a:hover {
  border-color: var(--coral);
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--coral) 6%, var(--white));
}
.page-toc .toc-list .n {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral);
  flex: none;
}
.page-toc .toc-list .t {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.3;
}
@media (max-width: 1000px) {
  .page-toc .toc-inner { grid-template-columns: 1fr; }
  .page-toc .toc-list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .page-toc .toc-list { grid-template-columns: 1fr; }
}

/* ---------- References (ČRA · Zentiva client case studies) ---------- */
.reference-card {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: var(--s-7);
  margin-bottom: var(--s-6);
}
.reference-card:last-child { margin-bottom: 0; }

.reference-card .ref-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--s-5);
  align-items: center;
  padding-bottom: var(--s-5);
  border-bottom: var(--border);
}
.reference-card image-slot.ref-logo {
  display: block;
  background: var(--grey-light);
  border: 1px dashed color-mix(in srgb, var(--steel) 50%, transparent);
}
.reference-card image-slot.ref-logo[data-filled] {
  background: transparent;
  border: none;
}
.reference-card image-slot.ref-logo[data-filled]::part(frame) {
  background: transparent;
}
.reference-card .ref-meta .ref-org {
  font-size: 22px;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: -0.01em;
}
.reference-card .ref-meta .ref-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  letter-spacing: 0.06em;
  margin-top: 6px;
}
.reference-card .ref-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--coral);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  align-self: start;
  padding-top: 4px;
}

.reference-card .ref-body { padding-top: var(--s-6); }
.reference-card .ref-body h3 {
  font-size: var(--t-h4);
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: var(--s-4);
}
.reference-card .ref-body .ref-lede {
  font-size: var(--t-body-lg);
  line-height: 1.55;
  color: rgba(0, 0, 0, 0.78);
}

.reference-card .ref-kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-4);
  margin: var(--s-6) 0;
  padding: var(--s-5) 0;
  border-top: 1px solid color-mix(in srgb, var(--steel) 25%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--steel) 25%, transparent);
}
.reference-card .ref-kpis > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.reference-card .ref-kpis .kpi-n {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 500;
  color: var(--coral);
  letter-spacing: -0.02em;
  line-height: 1;
}
.reference-card .ref-kpis .kpi-l {
  font-size: 13px;
  color: var(--steel);
  line-height: 1.4;
}

.reference-card .ref-quote {
  margin: 0;
  padding: 0;
  border-left: 3px solid var(--coral);
  padding-left: var(--s-5);
}
.reference-card .ref-quote p {
  font-size: 19px;
  line-height: 1.5;
  color: var(--navy);
  letter-spacing: -0.01em;
  text-wrap: pretty;
}
.reference-card .ref-quote footer {
  margin-top: var(--s-4);
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-style: normal;
}
.reference-card .ref-quote footer .cite-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--navy);
}
.reference-card .ref-quote footer .cite-role {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  letter-spacing: 0.04em;
}

.reference-card .ref-photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
  margin: var(--s-6) 0;
}
.reference-card .ref-photo-wrap {
  aspect-ratio: 4 / 3;
  width: 100%;
  overflow: hidden;
  border-radius: 12px;
}
.reference-card image-slot.ref-photo {
  width: 100%;
  height: 100% !important;
  display: block;
  background: var(--grey-light);
}

.reference-card .ref-quote-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: var(--s-3);
}
.reference-card .ref-body > .ref-quote + .ref-quote {
  margin-top: var(--s-6);
}


@media (max-width: 900px) {
  .reference-card .ref-kpis { grid-template-columns: repeat(2, 1fr); }
  .reference-card .ref-photos { grid-template-columns: 1fr; }
  .reference-card .ref-head { grid-template-columns: auto 1fr; }
  .reference-card .ref-tagline { display: none; }
}

/* ---------- Tweaks panel ---------- */
.tweaks-panel {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 280px;
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px -25px rgba(7,56,122,0.35);
  padding: 18px;
  z-index: 100;
  display: none;
  font-size: 13px;
}
.tweaks-panel.open { display: block; }
.tweaks-panel header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.tweaks-panel h6 {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--navy);
  font-weight: 600;
}
.tweaks-panel .tweak-close {
  background: transparent;
  border: 0;
  color: var(--steel);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}
.tweak {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 0;
  border-top: var(--border);
}
.tweak:first-of-type { border-top: 0; padding-top: 0; }
.tweak label { font-size: 12px; color: var(--steel); display: flex; justify-content: space-between; }
.tweak label .v { font-family: var(--font-mono); color: var(--black); }
.tweak input[type="range"] { width: 100%; accent-color: var(--coral); }
.tweak .seg {
  display: inline-flex;
  padding: 2px;
  background: var(--grey-light);
  border-radius: 999px;
  width: 100%;
}
.tweak .seg button {
  flex: 1;
  background: transparent;
  border: 0;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 11px;
  color: var(--steel);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}
.tweak .seg button[aria-pressed="true"] {
  background: var(--white);
  color: var(--navy);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  :root { --hero-pad-y: 80px; }
  .pillars, .personas, .outcomes, .evidence-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .timeline-step { border-right: 0; border-bottom: 1px solid color-mix(in srgb, var(--steel) 25%, transparent); min-height: auto; }
  .timeline-step:last-child { border-bottom: 0; }
  .hero-a .hero-grid, .hero-b .hero-grid { grid-template-columns: 1fr; }
  .hero-c .meta-row { grid-template-columns: 1fr 1fr; }
  .hero-c .lead-row { grid-template-columns: 1fr; }
  .hero-c .cta-row { justify-content: flex-start; }
  .step-card { grid-template-columns: 1fr; padding: 28px 24px; }
  .phase-strip { grid-template-columns: 1fr; }
  .phase-strip[data-style="dots"]::before { display: none; }
  .phase-nav-foot .pnf-grid { grid-template-columns: 1fr; }
  .phase-nav { display: none; }
  .header-inner { grid-template-columns: auto 1fr; gap: var(--s-4); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .phase-intro .intro-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  h1 { font-size: clamp(40px, 10vw, 56px); }
  h2 { font-size: clamp(32px, 7vw, 44px); }
  .container, .container-wide { padding: 0 var(--s-4); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--s-5); }
}