/* Bluefish Software — landing page */

:root {
  --bl-bg: #071220;
  --bl-ink: #E9F3FB;
  --bl-muted: #87A0B6;
  --bl-faint: #5E7488;
  --bl-accent: #8FE0FF;
  --bl-accent-lift: #B4F4FF;
  --bl-line: rgba(124,211,255,0.13);
  --bl-line-strong: rgba(124,211,255,0.22);
  --bl-wash6: rgba(124,211,255,0.06);
  --bl-plate: #E9F3FB;
  --bl-plate-border: transparent;
  --bl-vignette: rgba(7,18,32,0.55);
  --bl-card-bg: linear-gradient(180deg, rgba(13,32,52,0.6) 0%, rgba(11,27,45,0.6) 100%);
  --bl-card-shadow: 0 10px 24px rgba(0,0,0,0.3);
  --bl-card-border: transparent;
  --bl-contour-rgb: 143,224,255;
  --bl-selection: rgba(124,211,255,0.25);

  --font: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --gutter: 48px;
  /* Carousel geometry — also used to line the section title up with the logo plate. */
  --car-gap: clamp(56px, 27vw, 488px);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bl-bg: #F5F8FA;
  --bl-ink: #0B1B2D;
  --bl-muted: #44607a;
  --bl-faint: #7d93a8;
  --bl-accent: #1273a8;
  --bl-accent-lift: #0d5a85;
  --bl-line: rgba(11,27,45,0.12);
  --bl-line-strong: rgba(11,27,45,0.25);
  --bl-wash6: rgba(18,115,168,0.07);
  --bl-plate: #FFFFFF;
  --bl-plate-border: rgba(11,27,45,0.12);
  --bl-vignette: rgba(245,248,250,0.6);
  --bl-card-bg: linear-gradient(180deg, rgba(255,255,255,0.6) 0%, rgba(250,252,253,0.6) 100%);
  --bl-card-shadow: 0 12px 32px rgba(11,27,45,0.08);
  --bl-card-border: rgba(11,27,45,0.12);
  --bl-contour-rgb: 14,125,200;
  --bl-selection: rgba(19,127,177,0.25);
  color-scheme: light;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 72px; }
html, body { margin: 0; background: var(--bl-bg); }
body {
  color: var(--bl-ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--bl-selection); color: var(--bl-ink); }

a { color: var(--bl-accent); text-decoration: none; }
a:hover { color: var(--bl-accent-lift); }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--bl-accent); outline-offset: 2px; border-radius: 4px; }

.mono { font-family: var(--font-mono); }
.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--bl-faint);
}

/* ---------- Page shell & background ---------- */

.page {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.topo {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
  filter: blur(0.4px);
  -webkit-mask-image: linear-gradient(160deg, rgba(0,0,0,0) 30%, rgba(0,0,0,0.2) 50%, rgba(0,0,0,0.6) 72%, rgba(0,0,0,1) 100%);
  mask-image: linear-gradient(160deg, rgba(0,0,0,0) 30%, rgba(0,0,0,0.2) 50%, rgba(0,0,0,0.6) 72%, rgba(0,0,0,1) 100%);
  pointer-events: none;
}
:root[data-theme="light"] .topo { opacity: 0.75; }
.vignette {
  position: fixed;
  inset: 0;
  background: radial-gradient(120% 90% at 30% 20%, var(--bl-vignette) 0%, transparent 60%);
  pointer-events: none;
}
.page__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* ---------- Navigation ---------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  background: var(--bl-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--gutter);
  border-bottom: 1px solid var(--bl-line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--bl-ink);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--bl-ink); }
.brand img { border-radius: 8px; display: block; }
.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13.5px;
}
.nav__link { color: var(--bl-muted); }
.nav__link:hover { color: var(--bl-accent-lift); }

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  padding: 6px 8px;
  border-radius: 7px;
  cursor: pointer;
  transition: background .12s ease, color .12s ease;
}
.icon-btn:hover { background: var(--bl-wash6); }
.icon-btn--lang { margin: -6px -14px; }
.icon-btn--theme { margin: -6px -8px; color: var(--bl-faint); }
.icon-btn--theme:hover { color: var(--bl-muted); }

.flag { display: block; border-radius: 2px; }
.flag--cs { outline: 1px solid var(--bl-plate-border); }
.flag--cs, :root[lang="cs"] .flag--en { display: none; }
:root[lang="cs"] .flag--cs { display: block; }

.theme-icon--moon, :root[data-theme="light"] .theme-icon--sun { display: none; }
:root[data-theme="light"] .theme-icon--moon { display: block; }

/* ---------- Hero ---------- */

.hero {
  padding: 168px var(--gutter) 100px;
  max-width: 820px;
}
.hero h1 {
  margin: 0 0 24px;
  font-size: 52px;
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.hero p {
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--bl-muted);
  margin: 0;
  max-width: 560px;
}

/* ---------- Offer cards ---------- */

.offer {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding: 64px var(--gutter);
}
.card {
  background: var(--bl-card-bg);
  border-radius: 10px;
  padding: 40px 32px;
  min-height: 370px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--bl-card-shadow);
  border: 1px solid var(--bl-card-border);
}
.card .kicker { margin-bottom: 14px; }
.card h3 { margin: 0 0 14px; font-size: 19px; font-weight: 600; }
.card p { font-size: 14.5px; line-height: 1.65; color: var(--bl-muted); margin: 0 0 22px; }
.card a { margin-top: auto; font-size: 14px; }

/* ---------- Past projects (carousel) ---------- */

.work { padding: 150px var(--gutter) 60px; }
.work h2 {
  margin: 0 0 36px;
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.015em;
  /* Line the title up with the left edge of the centred logo plate. */
  padding-left: max(0px, calc((100% - 1040px - var(--car-gap)) / 2));
}
.carousel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  width: 100%;
}
.carousel__slide {
  display: grid;
  grid-template-columns: minmax(0, 420px) minmax(0, 620px);
  justify-content: center;
  column-gap: var(--car-gap);
  row-gap: 40px;
  align-items: center;
  min-height: 190px;
  width: 100%;
  transition: opacity .35s ease;
}
.carousel__slide.is-fading { opacity: 0; }
.plate {
  background: var(--bl-plate);
  border: 1px solid var(--bl-plate-border);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 180px;
  padding: 0 32px;
  width: 100%;
}
.plate img {
  max-width: 100%;
  max-height: 64px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  mix-blend-mode: multiply;
}
.plate [hidden] { display: none; }
/* Client site link: the whole plate is the click target. */
.plate { position: relative; }
.plate__link { display: flex; max-width: 100%; }
.plate__link::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.plate__link:focus-visible { outline: none; }
.plate__link:focus-visible::after { outline: 2px solid var(--bl-accent); outline-offset: 2px; }
.carousel__text { display: flex; flex-direction: column; gap: 10px; }
.carousel__text h3 { margin: 0; font-size: 22px; font-weight: 600; letter-spacing: -0.01em; }
.carousel__title { font-size: 15px; color: var(--bl-accent); font-weight: 500; }
.carousel__text p { font-size: 15px; line-height: 1.7; color: var(--bl-muted); margin: 4px 0 0; max-width: 620px; }

.carousel__dots { display: flex; gap: 10px; align-items: center; }
.carousel__dots[hidden] { display: none; }
.dot {
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px 0;
  display: flex;
}
.dot span {
  display: block;
  height: 2px;
  width: 12px;
  border-radius: 99px;
  background: var(--bl-line-strong);
  transition: width .35s ease, background .35s ease;
}
.dot.is-active span { width: 28px; background: var(--bl-accent); }

/* ---------- Contact ---------- */

.contact { padding: 144px var(--gutter) 120px; }
.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.contact__item {
  padding: 24px 28px;
  text-align: center;
  border-right: 1px dashed var(--bl-line);
}
.contact__item:last-child { border-right: none; }
.contact__item .kicker { margin-bottom: 12px; }
.contact__item a, .contact__value { font-size: 14px; }
.contact__value { color: var(--bl-ink); }
a.contact__value:hover { color: var(--bl-accent-lift); }
.contact__item p { font-size: 13px; line-height: 1.6; color: var(--bl-muted); margin: 10px 0 0; }

/* ---------- Footer ---------- */

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px var(--gutter);
  margin-top: auto;
  font-size: 12.5px;
  color: var(--bl-faint);
  border-top: 1px solid var(--bl-line);
}

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .offer { grid-template-columns: 1fr; max-width: 720px; }
  .card { min-height: 0; }
}

@media (max-width: 900px) {
  .carousel__slide { grid-template-columns: minmax(0, 1fr); justify-items: center; min-height: 440px; align-content: start; }
  .plate { max-width: 420px; }
  .carousel__text { width: 100%; max-width: 620px; }
  .work h2 { padding-left: 0; }
  .work { padding-top: 110px; }
  .contact { padding: 96px var(--gutter) 80px; }
  .contact__item { border-right: none; border-bottom: 1px dashed var(--bl-line); }
  .contact__item:last-child { border-bottom: none; }
}

@media (max-width: 640px) {
  :root { --gutter: 20px; }
  html { scroll-padding-top: 64px; }
  .nav { padding-top: 14px; padding-bottom: 14px; }
  .nav__links { gap: 22px; }
  .nav__link { display: none; }
  .hero { padding-top: 119px; padding-bottom: 61px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 15.5px; }
  .offer { padding-top: 32px; padding-bottom: 32px; gap: 16px; }
  .card { padding: 32px 24px; }
  .plate { height: 140px; padding: 0 24px; }
  .plate img { max-height: 48px; }
  .carousel__slide { row-gap: 28px; min-height: 480px; }
  .contact__item { padding: 24px 8px; }
  .footer { flex-direction: column; align-items: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .carousel__slide, .dot span { transition: none; }
}