:root {
  --ink: #121416;
  --ink-soft: #2a2e33;
  --stone: #e8e6e1;
  --paper: #f3f1ec;
  --mist: #d5d2cb;
  --steel: #4a5c6a;
  --steel-deep: #2f3d48;
  --white: #ffffff;
  --shadow: rgba(18, 20, 22, 0.18);
  --font-display: "Syne", sans-serif;
  --font-body: "Manrope", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(74, 92, 106, 0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(47, 61, 72, 0.08), transparent 55%),
    linear-gradient(180deg, var(--paper) 0%, var(--stone) 100%);
  background-attachment: fixed;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.container-wide {
  width: min(1280px, calc(100% - 2rem));
  margin-inline: auto;
}

/* NAV */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease), border-color 0.4s;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled,
.site-header.is-solid {
  background: rgba(243, 241, 236, 0.88);
  backdrop-filter: blur(14px);
  border-bottom-color: rgba(18, 20, 22, 0.08);
}

.site-header.is-over-dark:not(.is-scrolled):not(.is-solid) .brand-logo,
.site-header.is-over-dark:not(.is-scrolled):not(.is-solid) .nav-links a,
.site-header.is-over-dark:not(.is-scrolled):not(.is-solid) .nav-toggle {
  color: var(--white);
  filter: none;
}

.site-header.is-over-dark:not(.is-scrolled):not(.is-solid) .brand-logo img {
  filter: brightness(0) invert(1);
}

.nav-inner {
  width: min(1280px, calc(100% - 2rem));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
}

.brand-logo img {
  height: 1.15rem;
  width: auto;
  transition: filter 0.35s var(--ease);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  position: relative;
  color: var(--ink-soft);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  padding: 0.4rem;
}

.nav-toggle span {
  display: block;
  width: 1.4rem;
  height: 2px;
  background: currentColor;
  margin: 0.28rem 0;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

/* HERO */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s var(--ease), transform 6s linear;
  transform: scale(1.04);
}

.hero-slide.is-active {
  opacity: 1;
  transform: scale(1);
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(18, 20, 22, 0.45) 0%, rgba(18, 20, 22, 0.2) 35%, rgba(18, 20, 22, 0.72) 100%),
    linear-gradient(90deg, rgba(18, 20, 22, 0.35), transparent 55%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1280px, calc(100% - 2rem));
  margin: 0 auto 4.5rem;
  display: grid;
  gap: 1.25rem;
  max-width: 42rem;
  animation: rise 1s var(--ease) both;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin: 0;
}

.hero-brand span {
  display: block;
  font-weight: 500;
  opacity: 0.88;
  font-size: 0.52em;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: 0.55rem;
}

.hero-lead {
  margin: 0;
  max-width: 28rem;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.86);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.85rem;
  padding: 0.7rem 1.35rem;
  border: 1px solid transparent;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s, transform 0.3s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--white);
  color: var(--ink);
}

.btn-primary:hover {
  background: var(--paper);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-dark {
  background: var(--ink);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--ink-soft);
}

.btn-outline {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--white);
}

.hero-meta {
  position: absolute;
  right: max(1rem, calc((100% - 1280px) / 2));
  bottom: 4.5rem;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
}

.hero-progress {
  width: 4.5rem;
  height: 1px;
  background: rgba(255, 255, 255, 0.25);
  overflow: hidden;
}

.hero-progress i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--white);
  animation: progress 6s linear infinite;
}

/* SECTIONS */
.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.section-head {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  max-width: 36rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--steel);
}

.section-head h2,
.page-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.section-head p,
.lede {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* PROJECT GRID */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.filter-btn {
  border: 1px solid var(--mist);
  background: transparent;
  color: var(--ink-soft);
  padding: 0.55rem 0.95rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

.filter-btn:hover,
.filter-btn.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}

.project-item {
  position: relative;
  grid-column: span 6;
  overflow: hidden;
  background: var(--ink);
  min-height: 280px;
  isolation: isolate;
  display: block;
  color: inherit;
}

.project-item.is-hidden {
  display: none;
}

.project-item img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  transition: transform 0.8s var(--ease), opacity 0.4s;
  opacity: 0.92;
}

.project-item:hover img {
  transform: scale(1.05);
  opacity: 1;
}

.project-caption {
  position: absolute;
  inset: auto 0 0;
  padding: 1.25rem 1.35rem;
  background: linear-gradient(180deg, transparent, rgba(18, 20, 22, 0.82));
  color: var(--white);
  transform: translateY(0.35rem);
  transition: transform 0.4s var(--ease);
}

.project-item:hover .project-caption {
  transform: translateY(0);
}

.project-caption h3 {
  margin: 0 0 0.2rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 650;
}

.project-caption p {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.78;
}

/* ABOUT SPLIT */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.split-visual {
  position: relative;
  min-height: 420px;
  overflow: hidden;
}

.split-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 420px;
}

.split-visual::after {
  content: "";
  position: absolute;
  inset: auto -8% -8% auto;
  width: 42%;
  height: 42%;
  background: linear-gradient(135deg, var(--steel), var(--steel-deep));
  opacity: 0.35;
  mix-blend-mode: multiply;
  pointer-events: none;
}

.split-copy h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.split-copy p {
  color: var(--ink-soft);
  margin: 0 0 1rem;
}

.person {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--mist);
}

.person strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.person span {
  color: var(--steel);
  font-size: 0.9rem;
}

.offer-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.offer-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: start;
  color: var(--ink-soft);
}

.offer-list li::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  margin-top: 0.45rem;
  background: var(--steel);
}

/* PROJECT DETAIL */
.project-hero {
  position: relative;
  min-height: min(72svh, 720px);
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.project-hero-media {
  position: absolute;
  inset: 0;
}

.project-hero-media .hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.1s var(--ease), transform 7s linear;
  transform: scale(1.03);
}

.project-hero-media .hero-slide.is-active {
  opacity: 1;
  transform: scale(1);
}

.project-hero-media .hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-hero-content {
  position: relative;
  z-index: 2;
  padding-bottom: 3rem;
  padding-top: calc(var(--nav-h) + 2rem);
}

.project-hero-content h1 {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.78);
}

.back-link:hover {
  color: var(--white);
}

.project-detail-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.75fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.project-detail-copy p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.project-detail-meta {
  padding: 1.25rem 1.35rem;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(18, 20, 22, 0.08);
}

.project-detail-meta dl {
  margin: 0;
}

.project-meta-row {
  display: grid;
  gap: 0.15rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--mist);
}

.project-meta-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.project-meta-row:first-child {
  padding-top: 0;
}

.project-meta-row dt {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--steel);
}

.project-meta-row dd {
  margin: 0;
  color: var(--ink);
  font-weight: 550;
}

.project-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.project-gallery-item {
  margin: 0;
  overflow: hidden;
  background: var(--ink);
  min-height: 240px;
}

.project-gallery-item:nth-child(3n + 1) {
  grid-column: span 2;
}

.project-gallery-item img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.project-gallery-item:hover img {
  transform: scale(1.03);
}

/* PAGE HERO */
.page-hero {
  padding: calc(var(--nav-h) + 3.5rem) 0 2.5rem;
}

.page-hero .eyebrow {
  margin-bottom: 0.75rem;
}

/* CONTACT */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.contact-card {
  display: grid;
  gap: 1.5rem;
}

.contact-block h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.contact-block p,
.contact-block a {
  margin: 0;
  color: var(--ink-soft);
}

.contact-block a:hover {
  color: var(--ink);
}

.contact-form {
  display: grid;
  gap: 0.85rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(18, 20, 22, 0.08);
}

.contact-form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--steel);
}

.contact-form input,
.contact-form textarea {
  border: 1px solid var(--mist);
  background: var(--white);
  padding: 0.8rem 0.9rem;
  color: var(--ink);
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(74, 92, 106, 0.35);
  border-color: var(--steel);
}

.form-note {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.map-embed {
  margin-top: 2.5rem;
  min-height: 320px;
  background:
    linear-gradient(135deg, rgba(47, 61, 72, 0.12), rgba(74, 92, 106, 0.18)),
    url("../img/biuro_foto.jpg") center/cover;
  position: relative;
  overflow: hidden;
}

.map-embed a {
  position: absolute;
  inset: auto 1.25rem 1.25rem auto;
}

/* CTA BAND */
.cta-band {
  padding: 4rem 0;
  background: var(--ink);
  color: var(--white);
}

.cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.cta-inner h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
  max-width: 22rem;
}

/* FOOTER */
.site-footer {
  padding: 2.5rem 0 2rem;
  border-top: 1px solid rgba(18, 20, 22, 0.08);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: end;
}

.footer-brand img {
  height: 0.95rem;
  margin-bottom: 0.75rem;
}

.footer-brand p,
.footer-meta {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.footer-meta {
  text-align: right;
}

/* REVEAL */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes progress {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

/* MOBILE */
@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    background: rgba(243, 241, 236, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1.25rem 1.25rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid rgba(18, 20, 22, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s var(--ease), opacity 0.35s;
  }

  .nav-links.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .site-header.is-over-dark:not(.is-scrolled):not(.is-solid) .nav-links a {
    color: var(--ink-soft);
  }

  .hero-meta {
    display: none;
  }

  .project-item {
    grid-column: span 12;
  }

  .split,
  .contact-grid,
  .project-detail-grid {
    grid-template-columns: 1fr;
  }

  .project-gallery,
  .project-gallery-item:nth-child(3n + 1) {
    grid-template-columns: 1fr;
    grid-column: span 1;
  }

  .footer-meta {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}