/* =========================================================
   Arxity – tři lidé, logo, e-mail. Nic víc.
   ========================================================= */

:root {
  --bg: #0a0b0f;
  --fg: #f3f4f6;
  --fg-soft: #a6abb6;
  --fg-faint: #5d6270;
  --line: rgba(255, 255, 255, 0.08);

  --blue: #2da8ef;
  --gray: #8e96a3;

  /* ARX / IT / Y */
  --arx: #3b6fe8;
  --it: #19b3b0;
  --y: #ff8a3d;

  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Inter Tight", var(--font-body);
  --font-mark: "Montserrat", var(--font-body);

  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

a { color: inherit; text-decoration: none; }
p, h1, h2 { margin: 0; }

/* Jemné zrno přes celou stránku */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  opacity: 0.07;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- První obrazovka ---------- */
.hero {
  position: relative;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
}

/* Tři fotky vedle sebe */
.people {
  position: absolute;
  inset: 0;
  display: flex;
  gap: 2px;
  background: var(--line);
}
.person {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 2rem;
  color: #fff;
  background: #14161d;
  transition: flex 1s var(--ease);
}
.person::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--img);
  background-size: cover;
  background-position: center;
  filter: saturate(0.7) brightness(0.8);
  transform: scale(1.05);
  transition: transform 1.4s var(--ease), filter 0.9s;
  animation: appear 1.6s var(--ease) both;
}
.person:nth-child(2)::before { animation-delay: 0.12s; }
.person:nth-child(3)::before { animation-delay: 0.24s; }
@keyframes appear {
  from { opacity: 0; transform: scale(1.12); }
  to   { opacity: 1; transform: scale(1.05); }
}
.person::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to top, rgba(8, 9, 12, 0.92) 0%, rgba(8, 9, 12, 0.35) 40%, rgba(8, 9, 12, 0.25) 100%);
  transition: opacity 0.9s;
}
.person:hover { flex-grow: 1.5; }
.person:hover::before { transform: scale(1); filter: saturate(1) brightness(0.95); }

.person-arx { --accent: var(--arx); }
.person-it  { --accent: var(--it); }
.person-y   { --accent: var(--y); }

.caption {
  position: relative;
  z-index: 1;
  max-width: 22rem;
  opacity: 0;
  transform: translateY(12px);
  animation: fade-up 1s var(--ease) 1.1s forwards;
}
.caption h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 2.6vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  padding-left: 0.9rem;
  border-left: 3px solid var(--accent);
}
.caption p {
  margin-top: 0.75rem;
  padding-left: calc(0.9rem + 3px);
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.85);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.7s var(--ease), opacity 0.6s var(--ease) 0.1s;
}
.person:hover .caption p { max-height: 6rem; opacity: 1; }
@keyframes fade-up { to { opacity: 1; transform: none; } }

/* Logo přes fotky */
.brand {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none;
  padding: 0 var(--gutter);
  /* tmavé jádro, aby bylo logo vždy čitelné */
  background: radial-gradient(ellipse 60% 45% at 50% 48%, rgba(8, 9, 12, 0.55), rgba(8, 9, 12, 0) 70%);
}
.logo {
  font-family: var(--font-mark);
  font-weight: 700;
  font-size: clamp(2.8rem, 12vw, 10rem);
  line-height: 1;
  letter-spacing: 0.22em;
  padding-left: 0.22em;
  color: #fff;
  text-shadow: 0 2px 40px rgba(0, 0, 0, 0.5);
}
.wm-x { color: var(--gray); }
.wm-it { color: var(--blue); }
.line { display: block; overflow: hidden; padding-bottom: 0.08em; }
.word {
  display: inline-block;
  transform: translateY(110%);
  animation: rise 1.2s var(--ease) 0.35s forwards;
}
@keyframes rise { to { transform: translateY(0); } }

.tagline {
  margin-top: clamp(0.75rem, 2vw, 1.4rem);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.95rem, 2vw, 1.4rem);
  letter-spacing: 0.1em;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3em 0.8em;
  opacity: 0;
  animation: fade 1s var(--ease) 0.9s forwards;
  text-shadow: 0 1px 20px rgba(0, 0, 0, 0.6);
}
.t-arx { color: var(--arx); }
.t-it  { color: var(--it); }
.t-y   { color: var(--y); }
/* dovětek „s AI“: bílý, stejně výrazný jako ostatní slova */
.t-ai {
  color: #fff;
  font-size: 1.08em;
}
@keyframes fade { to { opacity: 1; } }

/* ---------- Krátký dojezd ---------- */
.close {
  min-height: 46svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(3rem, 8vh, 6rem) var(--gutter) 1.5rem;
}
.close-line {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--fg-soft);
  margin-bottom: 1.75rem;
}
.close-line strong { color: var(--fg); font-weight: 700; }

/* „spuštění se připravuje“: malý štítek s pulzující tečkou */
.soon {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  align-self: flex-start;
  margin-bottom: 1.1rem;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.soon-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 0 rgba(45, 168, 239, 0.6);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(45, 168, 239, 0.6); }
  70%  { box-shadow: 0 0 0 0.6rem rgba(45, 168, 239, 0); }
  100% { box-shadow: 0 0 0 0 rgba(45, 168, 239, 0); }
}

.mails {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15em;
}
.mail {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 6vw, 5rem);
  line-height: 1;
  letter-spacing: -0.045em;
  background-image: linear-gradient(var(--blue), var(--blue));
  background-repeat: no-repeat;
  background-size: 0% 0.08em;
  background-position: 0 100%;
  transition: background-size 0.6s var(--ease);
  padding-bottom: 0.08em;
}
.mail:hover { background-size: 100% 0.08em; }

/* ---------- Více informací (rozbalovací) ---------- */
.more { margin-top: 1.5rem; }
.more summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--fg-faint);
  transition: color 0.3s;
  user-select: none;
}
.more summary::-webkit-details-marker { display: none; }
.more summary::after {
  content: "";
  width: 0.45em; height: 0.45em;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: translateY(-20%) rotate(45deg);
  transition: transform 0.3s;
}
.more summary:hover { color: var(--fg); }
.more[open] summary { color: var(--fg-soft); }
.more[open] summary::after { transform: translateY(20%) rotate(-135deg); }

.more-body {
  max-width: 40rem;
  padding: 2rem 0 0.5rem;
  color: var(--fg-soft);
  font-size: 1rem;
  line-height: 1.7;
  animation: fade-up 0.6s var(--ease) both;
}
.more-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--fg);
  margin: 1.75rem 0 0.5rem;
}
.more-body h3:first-child { margin-top: 0; }
.more-body p { margin: 0 0 0.9rem; }
.questions {
  list-style: none;
  padding: 0;
  margin: 0 0 1.1rem;
}
.questions li {
  position: relative;
  padding: 0.35rem 0 0.35rem 1.4rem;
  color: var(--fg);
}
.questions li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.95rem;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--arx);
}
.questions-y li::before { background: var(--y); }
.more-contact a { border-bottom: 1px solid var(--blue); }
.more-contact a:hover { color: var(--blue); }

.foot {
  margin-top: auto;
  padding-top: clamp(2.5rem, 7vh, 5rem);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--fg-faint);
}
.foot b { font-weight: 700; }
.c-arx { color: var(--arx); }
.c-it  { color: var(--it); }
.c-y   { color: var(--y); }

/* ---------- Mobil ---------- */
@media (max-width: 760px) {
  .people { flex-direction: column; }
  .person { padding: 1.1rem 1.25rem; }
  .person:hover { flex-grow: 1; }
  .caption h2 { font-size: 1.25rem; }
  .caption p { display: none; }
  .logo { font-size: clamp(2.4rem, 14vw, 4.5rem); letter-spacing: 0.18em; padding-left: 0.18em; }
  .brand { background: radial-gradient(ellipse 80% 30% at 50% 50%, rgba(8, 9, 12, 0.6), rgba(8, 9, 12, 0) 70%); }
}

/* Bez animací pro ty, kdo si to přejí */
@media (prefers-reduced-motion: reduce) {
  .word, .tagline, .caption, .person::before, .soon-dot { animation: none !important; }
  .word { transform: none; }
  .tagline, .caption { opacity: 1; transform: none; }
  .person, .person::before, .caption p { transition: none; }
}