/* ==========================================================================
   IAM L3 Conference 2026 — arkusz stylów witryny statycznej
   Jeden plik dla wszystkich podstron. Bez zależności zewnętrznych,
   bez fontów z CDN, bez kroku budowania.
   ========================================================================== */

/* --- 1. Kroje pisma ----------------------------------------------------- */
/*  Pliki .woff2 są przycięte do znaków używanych na witrynie (łacina
    podstawowa i rozszerzona) i leżą na tym samym serwerze — CSP `default-src
    'self'` przepuszcza je bez żadnego wyjątku.                              */

@font-face {
  font-family: "Montserrat";
  src: url("/assets/fonts/montserrat-var.woff2") format("woff2");
  font-weight: 300 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "PT Sans";
  src: url("/assets/fonts/ptsans-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "PT Sans";
  src: url("/assets/fonts/ptsans-bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "PT Sans";
  src: url("/assets/fonts/ptsans-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

/* --- 2. Zmienne --------------------------------------------------------- */

:root {
  --navy: #003366;
  --navy-dark: #001f4d;
  --navy-tint: #eaf0f6;      /* granat rozjaśniony do roli tła */
  --navy-line: #c3d2e2;
  --ink: #1c1c1c;
  --ink-muted: #565656;
  --link: #0b4f8a;
  --link-visited: #5a3a86;
  --rule: #d5d5d5;
  --rule-soft: #e7e7e2;
  --paper: #ffffff;
  --paper-alt: #f5f5f2;
  --focus: #b35c00;

  --measure: 40rem;          /* ~70-75 znaków w kolumnie tekstu */
  --wrap: 72rem;
  --space: 1.25rem;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0, 31, 77, .05), 0 8px 20px -16px rgba(0, 31, 77, .45);
  --shadow-md: 0 2px 6px rgba(0, 31, 77, .06), 0 22px 48px -28px rgba(0, 31, 77, .55);

  --font-body: "PT Sans", system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-head: "Montserrat", system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

/* --- 3. Reset i podstawy ------------------------------------------------ */

*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;   /* przyklejony nagłówek nie zasłania kotwic */
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--paper-alt);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, video, iframe { max-width: 100%; }
img, video { height: auto; display: block; }

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: .17em;
  transition: color .12s ease;
}
a:visited { color: var(--link-visited); }
a:hover { color: var(--navy-dark); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule-soft);
  margin: 2.75rem 0 0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--space);
}

/* --- 4. Link „przejdź do treści" ---------------------------------------- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--navy);
  color: #fff;
  padding: .75rem 1.25rem;
  border-radius: 0 0 var(--radius-sm) 0;
  font-family: var(--font-head);
  font-weight: 600;
}
.skip-link:visited { color: #fff; }
.skip-link:focus {
  left: 0;
  color: #fff;
}

/* --- 5. Nagłówek -------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--rule-soft);
  box-shadow: 0 8px 24px -22px rgba(0, 31, 77, .8);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: .9rem;
}

.site-title {
  flex: 1 1 12rem;          /* baza mniejsza niż treść: przycisk „Menu"
                               zostaje w tym samym wierszu co tytuł */
  min-width: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--navy);
  text-decoration: none;
  padding-left: .85rem;
  border-left: 3px solid var(--navy);
}
.site-title:visited { color: var(--navy); }
.site-title:hover { color: var(--navy-dark); }
.site-title span {
  display: block;
  font-weight: 500;
  font-size: .75rem;
  color: var(--ink-muted);
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-top: .25rem;
}

/* przycisk „Menu" — pokazywany dopiero przez JavaScript */

.nav-toggle {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-head);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--navy);
  background: var(--paper);
  border: 1px solid var(--navy-line);
  border-radius: var(--radius-sm);
  padding: .55rem .85rem;
  cursor: pointer;
}
.nav-toggle:hover { background: var(--navy-tint); }
.nav-toggle[hidden] { display: none; }

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 1.05rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}
.nav-toggle-bars {
  position: relative;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  transition: transform .15s ease;
}
.nav-toggle-bars::before { top: -.34rem; }
.nav-toggle-bars::after  { top:  .34rem; }

/* --- 6. Nawigacja ------------------------------------------------------- */
/*  Uwaga na `:visited`. Globalna reguła `a:visited` niżej w tym pliku ma
    wyższą specyficzność niż sama klasa `.nav-link`, więc bez powtórzenia
    selektora z `:visited` odwiedzone pozycje menu robią się fioletowe —
    i to tylko te, które są odnośnikami, bo etykieta grupy jest przyciskiem.
    Każda reguła nadająca kolor pozycji menu ma tu swój wariant `:visited`. */
/*  Bez JavaScriptu nawigacja jest zwykłą, w całości widoczną listą
    odnośników z podlistami — dlatego stany zwinięte włącza dopiero
    klasa `nav-js`, którą dokłada skrypt.                                    */

.site-nav {
  flex-basis: 100%;
  order: 3;
}
.site-nav.nav-js { display: none; }
.site-nav.nav-js.is-open { display: block; }

.nav-list,
.nav-sub {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link,
.nav-link:visited,
.nav-group-label {
  display: flex;
  align-items: center;
  gap: .5rem;
  width: 100%;
  font-family: var(--font-head);
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  text-decoration: none;
}

.nav-list > .nav-item > .nav-link,
.nav-group-label {
  padding: .7rem .25rem;
  border-bottom: 1px solid var(--rule-soft);
}

button.nav-group-label {
  justify-content: space-between;
  font-size: .9375rem;
  background: none;
  border-top: 0;
  border-right: 0;
  border-left: 0;
  text-align: left;
  cursor: pointer;
}

.nav-chevron {
  flex: none;
  width: .45rem;
  height: .45rem;
  margin-top: -.2em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  opacity: .65;
  transform: rotate(45deg);
  transition: transform .15s ease;
}
.nav-group.is-open > .nav-group-label .nav-chevron {
  margin-top: .15em;
  transform: rotate(-135deg);
}

.nav-sub {
  margin: .25rem 0 .75rem;
  padding-left: .95rem;
  border-left: 2px solid var(--navy-line);
}
.site-nav.nav-js .nav-group:not(.is-open) > .nav-sub { display: none; }

.nav-sub .nav-link,
.nav-sub .nav-link:visited {
  padding: .45rem .25rem;
  font-weight: 500;
  color: var(--ink-muted);
}
.nav-sub .nav-link:hover { color: var(--navy-dark); }

.nav-link[aria-current="page"],
.nav-link[aria-current="page"]:visited,
.nav-group.is-current > .nav-group-label {
  color: var(--navy);
}
.nav-sub .nav-link[aria-current="page"] { font-weight: 700; }

@media (min-width: 60rem) {
  .header-inner {
    flex-wrap: nowrap;
    padding-block: 1rem;
  }
  .site-title { font-size: 1.125rem; }
  .nav-toggle { display: none; }

  .site-nav,
  .site-nav.nav-js { display: block; flex-basis: auto; order: 0; }

  .nav-list {
    display: flex;
    align-items: center;
    gap: .15rem;
  }
  .nav-item { position: relative; }

  .nav-list > .nav-item > .nav-link,
  .nav-group-label {
    width: auto;
    padding: .5rem .7rem;
    border: 0;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: background-color .12s ease, color .12s ease;
  }
  .nav-list > .nav-item > .nav-link:hover,
  .nav-group:hover > .nav-group-label,
  .nav-group.is-open > .nav-group-label {
    background: var(--navy-tint);
    color: var(--navy-dark);
  }

  /* aktywna pozycja: granatowa belka pod etykietą */
  .nav-list > .nav-item > .nav-link[aria-current="page"],
  .nav-list > .nav-item > .nav-link[aria-current="page"]:visited,
  .nav-group.is-current > .nav-group-label {
    color: var(--navy);
  }
  .nav-list > .nav-item > .nav-link[aria-current="page"]::after,
  .nav-group.is-current > .nav-group-label::after {
    content: "";
    position: absolute;
    left: .7rem;
    right: .7rem;
    bottom: -.1rem;
    height: 2px;
    border-radius: 2px;
    background: var(--navy);
  }

  .site-nav.nav-js .nav-sub {
    position: absolute;
    top: calc(100% + .55rem);
    left: 0;
    z-index: 10;
    min-width: 15.5rem;
    margin: 0;
    padding: .4rem;
    background: var(--paper);
    border: 1px solid var(--rule-soft);
    border-left-width: 1px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
  }
  .site-nav.nav-js .nav-item:last-child .nav-sub { left: auto; right: 0; }

  /* Niewidzialny mostek zasłaniający przerwę między etykietą a panelem.
     Bez niego kursor w drodze w dół wypada poza kategorię i menu znika. */
  .site-nav.nav-js .nav-sub::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -.75rem;
    height: .75rem;
  }

  .site-nav.nav-js .nav-sub .nav-link,
  .site-nav.nav-js .nav-sub .nav-link:visited {
    padding: .5rem .65rem;
    border-radius: var(--radius-sm);
    color: var(--ink);
    font-weight: 500;
    white-space: nowrap;
  }
  .site-nav.nav-js .nav-sub .nav-link:hover {
    background: var(--navy-tint);
    color: var(--navy-dark);
  }
  .site-nav.nav-js .nav-sub .nav-link[aria-current="page"],
  .site-nav.nav-js .nav-sub .nav-link[aria-current="page"]:visited {
    color: var(--navy);
    background: var(--navy-tint);
  }

  /* bez JavaScriptu podlisty zostają rozwinięte obok siebie */
  .site-nav:not(.nav-js) .nav-list { align-items: flex-start; padding-bottom: .5rem; }
  .site-nav:not(.nav-js) .nav-sub { border-left: 0; padding-left: .7rem; }
}

/* --- 7. Treść ----------------------------------------------------------- */

main { display: block; }

.page {
  max-width: var(--measure);
  margin-inline: auto;
  padding: 2.75rem var(--space) 3.25rem;
  background: var(--paper);
}

/* karta treści nachodząca na obraz banerowy albo sekcję powitalną */
@media (min-width: 48rem) {
  .page-banner + .page,
  .hero + .page {
    position: relative;
    z-index: 2;
    max-width: calc(var(--measure) + 5.5rem);
    margin-top: -3.5rem;
    padding: 3rem 2.75rem 3.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
  }
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--navy);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -.015em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.875rem, 1.55rem + 1.4vw, 2.5rem);
  margin: 0 0 1.75rem;
}
.page h1::after {
  content: "";
  display: block;
  width: 3.25rem;
  height: 3px;
  margin-top: 1.1rem;
  border-radius: 2px;
  background: var(--navy);
}

h2 {
  font-size: clamp(1.3125rem, 1.2rem + .5vw, 1.5rem);
  margin: 2.75rem 0 .85rem;
}
h3 {
  font-size: 1.125rem;
  margin: 2.25rem 0 .5rem;
}
h4 {
  font-size: 1rem;
  margin: 1.75rem 0 .25rem;
  color: var(--ink);
}

p { margin: 0 0 1.15rem; }

.page ul, .page ol { margin: 0 0 1.25rem; padding-left: 1.35rem; }
.page li { margin-bottom: .45rem; }

/* punktory listy w kolorze witryny */
.page ul { list-style: none; }
.page ul > li { position: relative; }
.page ul > li::before {
  content: "";
  position: absolute;
  left: -1.05rem;
  top: .68em;
  width: .4rem;
  height: .4rem;
  border-radius: 50%;
  background: var(--navy);
  opacity: .55;
}
.page ol > li::marker { color: var(--navy); font-weight: 700; }

s { color: var(--ink-muted); text-decoration-color: rgba(28, 28, 28, .4); }

strong { font-weight: 700; }

figure { margin: 2.25rem 0; }
figure img { border-radius: var(--radius-sm); }
figcaption { font-size: .875rem; color: var(--ink-muted); margin-top: .6rem; }

/* obraz banerowy nad tytułem podstrony */
.page-banner {
  width: 100%;
  height: clamp(11rem, 26vw, 20rem);
  object-fit: cover;
  object-position: center;
}

/* blok listy nazwisk (komitety) */
.names {
  margin: 0 0 1.5rem;
  padding: 1.1rem 1.35rem;
  background: var(--paper-alt);
  border-left: 3px solid var(--navy-line);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.names p { margin: 0 0 .3rem; }
.names p:last-child { margin-bottom: 0; }

/* wyróżniony odnośnik w formie przycisku */
.btn,
.programme-button {
  display: inline-block;
  padding: .8rem 1.4rem;
  background: var(--navy);
  color: #fff;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-family: var(--font-head);
  font-size: .9375rem;
  font-weight: 600;
  letter-spacing: .01em;
  box-shadow: var(--shadow-sm);
  transition: background-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.btn { margin: .5rem 0 1.5rem; }
.btn:visited,
.programme-button:visited { color: #fff; }
.btn:hover,
.programme-button:hover {
  background: var(--navy-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* karta z odnośnikiem do programu (podstrona „Schedule") */
.programme-card {
  margin: 2rem 0;
  padding: 2.5rem 2rem;
  border: 1px solid var(--navy-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--navy-tint), var(--paper-alt));
  text-align: center;
}
.programme-card p {
  margin-bottom: 0;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--navy);
}
.programme-button { margin-top: 1.4rem; }

/* portret prelegenta */
.speaker-photo { margin: 2.5rem 0 1.25rem; }
.speaker-photo img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

/* mapa Google */
.map-embed { margin: 2rem 0; }
.map-embed iframe {
  width: 100%;
  height: 26rem;
  display: block;
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

/* film */
.video-embed video {
  width: 100%;
  background: #000;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

/* --- 8. Sekcja powitalna na stronie głównej ----------------------------- */

.hero {
  position: relative;
  background-color: #10243b;
  background-image:
    linear-gradient(180deg, rgba(0, 20, 45, .55) 0%, rgba(0, 20, 45, .78) 55%, rgba(0, 20, 45, .92) 100%),
    url("/assets/img/2025/09/c97cfe060e838b5ca4cc654fdfce094e-1.jpg");
  background-size: cover;
  background-position: center;
  color: #fff;
}

.hero-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 4.5rem var(--space) 5.5rem;
}

.hero h1 {
  color: #fff;
  font-size: clamp(1.75rem, 1.15rem + 2.6vw, 3rem);
  line-height: 1.15;
  margin: 0 0 1.5rem;
  max-width: 22ch;
  text-shadow: 0 2px 20px rgba(0, 15, 35, .5);
}

.hero-dates {
  display: inline-block;
  margin: 0;
  padding: .55rem 1.15rem;
  font-family: var(--font-head);
  font-size: .9375rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .38);
  border-radius: 999px;
}

@media (min-width: 48rem) {
  .hero-inner { padding: 6.5rem var(--space) 7.5rem; }
  .hero-dates { font-size: 1rem; }
}

/* --- 9. Stopka ---------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--rule-soft);
  background: var(--paper-alt);
  margin-top: 3.5rem;
  padding: 3rem 0 2.5rem;
}

/* mapa witryny w stopce */
.footer-nav { margin-bottom: 3rem; }

.footer-nav-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1.75rem 2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-nav-list ul {
  margin: .6rem 0 0;
  padding: 0;
  list-style: none;
}
.footer-nav-list li { margin: 0; }
.footer-nav-list ul li + li { margin-top: .3rem; }

.footer-nav-head {
  display: block;
  font-family: var(--font-head);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--navy);
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--rule);
}
.footer-nav a {
  font-size: .9375rem;
  color: var(--ink-muted);
  text-decoration: none;
}
.footer-nav a:visited { color: var(--ink-muted); }
.footer-nav a:hover { color: var(--navy-dark); text-decoration: underline; }

.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  align-items: center;
  gap: 1rem;
  margin: 0 0 2.5rem;
  padding: 0;
  list-style: none;
}
.logo-grid li {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 5.5rem;
  margin: 0;
  padding: .9rem 1rem;
  background: var(--paper);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-sm);
}
.logo-grid img {
  max-height: 3.25rem;
  width: auto;
  max-width: 100%;
}
.logo-grid img.logo-tall { max-height: 4.25rem; }

.footer-meta {
  text-align: center;
  font-size: .9375rem;
  color: var(--ink-muted);
  border-top: 1px solid var(--rule);
  padding-top: 1.75rem;
}
.footer-meta p { margin: 0 0 .4rem; }
.footer-meta p:first-child {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--ink);
}
.footer-meta p:last-child { margin-bottom: 0; }

/* --- 10. Strona 404 ----------------------------------------------------- */

.error-page ul { list-style: none; padding-left: 0; }
.error-page ul > li::before { display: none; }

/* --- 11. Druk ----------------------------------------------------------- */

@media print {
  .site-nav, .nav-toggle, .skip-link, .logo-grid, .footer-nav { display: none; }
  .site-header { position: static; box-shadow: none; }
  body { background: #fff; font-size: 11pt; }
  .page-banner + .page, .hero + .page {
    margin-top: 0;
    box-shadow: none;
    padding: 0;
  }
  a { color: #000; }
}