/* ============================================================
   Geodeti — Design tokens
   ============================================================ */
:root {
  --color-primary: #0F172A;
  --color-on-primary: #FFFFFF;
  --color-secondary: #334155;
  --color-accent: #0369A1;
  --color-accent-hover: #075985;
  --color-bg: #F8FAFC;
  --color-fg: #020617;
  --color-muted: #E8ECF1;
  --color-border: #E2E8F0;

  --font-heading: 'Lexend', sans-serif;
  --font-body: 'Source Sans 3', sans-serif;

  --space-1: 0.5rem;   /* 8px */
  --space-2: 1rem;     /* 16px */
  --space-3: 1.5rem;   /* 24px */
  --space-4: 2rem;     /* 32px */
  --space-5: 3rem;     /* 48px */
  --space-6: 4rem;     /* 64px */
  --space-7: 6rem;     /* 96px */
  --space-8: 8rem;     /* 128px */

  --container-max: 1280px;
  --container-pad: clamp(1.25rem, 5vw, 4rem);
  --header-h: 4.75rem;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 200ms;
  --dur-med: 350ms;
}

/* ============================================================
   Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: auto; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body, h1, h2, h3, p, ol, ul, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: none; padding: 0; }

body {
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.25rem, 4.5vw + 1rem, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 2.5vw + 1rem, 2.75rem); }
h3 { font-size: clamp(1.125rem, 1vw + 0.9rem, 1.375rem); font-weight: 600; }

p { max-width: 65ch; }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  z-index: 1000;
}
.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

.header-sentinel { position: absolute; top: 0; height: 1px; width: 1px; }

/* ============================================================
   Layout utilities
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.grid-12 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(12, 1fr); column-gap: var(--space-4); }
}

.eyebrow {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}
.eyebrow-on-dark { color: #7dd3fc; }

.section-head { margin-bottom: var(--space-6); max-width: 46rem; }

section { padding-block: var(--space-7); }

.dark-band {
  background: var(--color-primary);
  color: #fff;
}
.dark-band h2 { color: #fff; }
.dark-band p { color: #cbd5e1; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.6rem;
  border-radius: 2px;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  cursor: pointer;
  min-height: 44px;
}
.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover { background: var(--color-accent-hover); }
.btn-accent:active { transform: scale(0.98); }
.btn-ghost {
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
}
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

/* ============================================================
   Header / Nav
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out);
}
.site-header.scrolled {
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(8px);
  border-bottom-color: var(--color-border);
}

.header-inner {
  width: 100%;
  display: flex;
  align-items: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  margin-right: auto;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-fg);
}
.site-header:not(.scrolled) .logo { color: #fff; }
.logo-mark {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linejoin: round;
  flex-shrink: 0;
}
.logo-mark circle { fill: var(--color-accent); stroke: none; }

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.nav-link {
  position: relative;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.35rem 0;
  color: var(--color-fg);
}
.site-header:not(.scrolled) .nav-link { color: #fff; }
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out);
}
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }

.nav-cta {
  background: var(--color-accent);
  color: #fff !important;
  padding: 0.5rem 1.1rem;
  border-radius: 2px;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--color-accent-hover); }

.hamburger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
}
.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--color-fg);
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.site-header:not(.scrolled) .hamburger span { background: #fff; }

@media (max-width: 767px) {
  .hamburger { display: flex; }
  .nav-list {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg);
    padding: var(--space-3) var(--container-pad);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out), visibility var(--dur-med);
  }
  .nav-list.open {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
  }
  .nav-link, .nav-cta {
    color: var(--color-fg) !important;
    width: 100%;
    display: flex;
    min-height: 48px;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-cta { border-bottom: none; margin-top: var(--space-2); justify-content: center; }
  .nav-open .hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-open .hamburger span:nth-child(2) { opacity: 0; }
  .nav-open .hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  margin-top: calc(var(--header-h) * -1);
  padding-top: var(--header-h);
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: kenburns 20s var(--ease-out) forwards;
}
@keyframes kenburns {
  from { transform: scale(1); }
  to { transform: scale(1.08); }
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.55) 45%, rgba(15,23,42,0.25) 75%);
}
.hero-content {
  position: relative;
  color: #fff;
  padding: var(--space-7) var(--container-pad) var(--space-8);
  max-width: 900px;
}
.hero-content h1 { color: #fff; }
.hero-sub {
  font-size: 1.125rem;
  color: #e2e8f0;
  margin-top: var(--space-3);
  max-width: 42ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.scroll-cue {
  position: absolute;
  bottom: var(--space-3);
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 46px;
  border: 2px solid rgba(255,255,255,0.6);
  border-radius: 20px;
}
.scroll-cue span {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 4px;
  margin-left: -2px;
  background: #fff;
  border-radius: 50%;
  animation: scrollcue 1.8s ease infinite;
}
@keyframes scrollcue {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(18px); }
  100% { opacity: 0; transform: translateY(18px); }
}

/* ============================================================
   Scroll reveal
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Intro / question list
   ============================================================ */
.intro-grid { align-items: start; }
.intro-heading-col { grid-column: 1 / -1; }
.intro-list-col { grid-column: 1 / -1; }
@media (min-width: 1024px) {
  .intro-heading-col { grid-column: 1 / 5; position: sticky; top: calc(var(--header-h) + var(--space-4)); }
  .intro-list-col { grid-column: 5 / 13; }
}

.question-list li {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  font-size: 1.0625rem;
}
.question-list li:first-child { border-top: 1px solid var(--color-border); }
.q-num {
  font-family: var(--font-heading);
  color: var(--color-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  flex-shrink: 0;
  width: 1.75rem;
}
.intro-cta {
  margin-top: var(--space-4);
  font-size: 1.0625rem;
  max-width: none;
}
.intro-cta a {
  color: var(--color-accent);
  font-weight: 600;
  border-bottom: 1px solid var(--color-accent);
}

/* ============================================================
   About / Team
   ============================================================ */
.about-intro {
  font-size: 1.25rem;
  font-family: var(--font-heading);
  font-weight: 400;
  max-width: 50rem;
  margin-bottom: var(--space-7);
  color: var(--color-secondary);
}

.team-member {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-border);
}
.team-member:last-child { border-bottom: 1px solid var(--color-border); }

@media (min-width: 1024px) {
  .team-member { grid-template-columns: 5fr 7fr; align-items: center; gap: var(--space-6); }
  .team-member-reverse { grid-template-columns: 7fr 5fr; }
  .team-member-reverse .team-photo { order: 2; }
}

.team-photo {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  max-width: 320px;
  background: var(--color-muted);
}
.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(60%);
  transition: filter var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
.team-member:hover .team-photo img {
  filter: grayscale(0%);
  transform: scale(1.03);
}

.team-bio h3 { margin-bottom: var(--space-2); }
.team-bio p { margin-bottom: var(--space-3); color: var(--color-secondary); }

.credential-pills { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-primary);
  background: #fff;
}
.pill-icon {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* ============================================================
   Services
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}
@media (min-width: 640px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(4, 1fr); }
}

.service-item {
  background: var(--color-primary);
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  transition: background-color var(--dur-fast) var(--ease-out);
}
.service-item:hover { background: #17223d; }
.service-item span { font-size: 0.95rem; color: #e2e8f0; font-weight: 500; }

.service-icon {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: #7dd3fc;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--dur-fast) var(--ease-out), stroke var(--dur-fast) var(--ease-out);
}
.service-item:hover .service-icon { transform: scale(1.1); stroke: #fff; }
.pin-dot { fill: #7dd3fc; stroke: none; }

.service-item-more { opacity: 0.7; }
.service-item-more span { font-style: italic; }

/* ============================================================
   Projects
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 640px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(3, 1fr); }
}

.project-card h3 { margin-top: var(--space-2); }
.project-card p { color: var(--color-secondary); margin-top: 0.2rem; }

.project-photo {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-muted);
}
.project-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-med) var(--ease-out);
}
.project-card:hover .project-photo img { transform: scale(1.06); }

.date-tab {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.75rem;
}

/* ============================================================
   Contact
   ============================================================ */
.contact-grid { align-items: start; }
.contact-intro { grid-column: 1 / -1; position: relative; }
.contact-people { grid-column: 1 / -1; display: grid; gap: var(--space-4); }
@media (min-width: 1024px) {
  .contact-intro { grid-column: 1 / 6; }
  .contact-people { grid-column: 6 / 13; grid-template-columns: repeat(2, 1fr); align-content: start; }
}

.contact-lead { color: #cbd5e1; margin-top: var(--space-2); }
.office-address {
  margin-top: var(--space-4);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: #fff;
}
.contact-intro .btn { margin-top: var(--space-4); }

.contact-mark {
  position: absolute;
  right: -1rem;
  bottom: -2rem;
  width: 140px;
  height: 140px;
  fill: none;
  stroke: rgba(255,255,255,0.08);
  stroke-width: 1.5;
  display: none;
}
.contact-mark circle { fill: rgba(3,105,161,0.25); stroke: none; }
@media (min-width: 1024px) { .contact-mark { display: block; } }

.contact-card {
  border: 1px solid rgba(255,255,255,0.15);
  padding: var(--space-4);
}
.contact-card h3 { color: #fff; margin-bottom: var(--space-2); }
.contact-phone {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  color: #7dd3fc;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.contact-phone:hover { border-color: #7dd3fc; }
.contact-card .ico { margin-top: var(--space-2); color: #cbd5e1; font-size: 0.9rem; }
.contact-card .billing { margin-top: var(--space-3); color: #94a3b8; font-size: 0.85rem; }
.contact-card .billing strong { color: #cbd5e1; font-weight: 600; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-primary);
  color: #94a3b8;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-block: var(--space-5);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-5);
}
.footer-brand { color: #fff; margin-right: auto; }
.footer-line { font-size: 0.9rem; }
.footer-line a { color: #7dd3fc; }
.back-to-top {
  margin-left: auto;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  color: #fff;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.back-to-top:hover { opacity: 0.7; }

.footer-credit {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-credit-line {
  max-width: none;
  width: fit-content;
  margin-inline: auto;
  font-size: 1rem;
  color: #94a3b8;
}
.footer-credit-line a {
  color: #94a3b8;
  border-bottom: 1px solid #94a3b8;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.footer-credit-line a:hover { color: #7dd3fc; border-color: #7dd3fc; }

/* ============================================================
   Scroll-margin for anchor targets (offset for sticky header)
   ============================================================ */
#uvod, #o-nas, #nabizime, #projekty, #kontakt {
  scroll-margin-top: var(--header-h);
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto !important; }
  .hero-img { animation: none; transform: scale(1); }
  [data-reveal] { opacity: 1; transform: none; }
}