* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #101214;
  --bg-soft: #191c1f;
  --paper: #f2f0ea;
  --paper-soft: rgba(242, 240, 234, 0.84);
  --text: #111214;
  --muted: rgba(242, 240, 234, 0.72);
  --muted-dark: rgba(17, 18, 20, 0.68);
  --line: rgba(242, 240, 234, 0.16);
  --line-dark: rgba(17, 18, 20, 0.16);
  --charcoal: #17191c;
  --graphite: #25282c;
  --stone: #8f867c;
  --sand: #c9b9a6;
  --cream: #f2f0ea;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.26);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  background:
    radial-gradient(circle at 12% 0%, rgba(201, 185, 166, 0.10), transparent 30%),
    linear-gradient(180deg, #111315 0%, #1a1d20 45%, #101214 100%);
  color: var(--cream);
  overflow-x: hidden;
}

body.is-splashing {
  overflow: hidden;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: var(--sand);
  color: var(--charcoal);
}

/* START ANIMATION - COS 1:1 STRUCTURE */
.splash-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 22% 20%, rgba(201, 185, 166, 0.14), transparent 30%),
    linear-gradient(135deg, #101214 0%, #25282c 100%);
  opacity: 1;
  visibility: visible;
  transition:
    opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
    visibility 0.9s ease;
}

.splash-screen::before,
.splash-screen::after {
  content: "";
  position: absolute;
  inset: -10%;
  pointer-events: none;
  transform: translateX(-110%) skewX(-10deg);
  will-change: transform;
}

.splash-screen::before {
  background: rgba(201, 185, 166, 0.10);
}

.splash-screen::after {
  background: rgba(242, 240, 234, 0.22);
  animation-delay: 0.16s;
}

.splash-screen.is-ready::before {
  animation: splashSweep 2.25s cubic-bezier(0.77, 0, 0.18, 1) both;
}

.splash-screen.is-ready::after {
  animation: splashSweep 2.25s cubic-bezier(0.77, 0, 0.18, 1) 0.18s both;
}

.splash-screen.is-hidden-instant {
  display: none;
}

.splash-card {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: 13px;
  padding: 38px 44px;
  min-width: min(420px, calc(100vw - 44px));
  opacity: 0;
  transform: translateY(24px) scale(0.96);
  filter: blur(8px);
  will-change: transform, opacity, filter;
}

.splash-screen.is-ready .splash-card {
  animation: splashCardIn 1s cubic-bezier(0.22, 1, 0.36, 1) 0.14s both;
}

.splash-screen.is-leaving {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.splash-screen.is-leaving .splash-card {
  animation: splashCardOut 0.78s cubic-bezier(0.65, 0, 0.35, 1) both;
}

.splash-logo {
  position: relative;
  display: grid;
  place-items: center;
  width: 210px;
  min-height: 130px;
  overflow: hidden;
}

.splash-logo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 15%, rgba(255, 255, 255, 0.58) 45%, transparent 72%);
  transform: translateX(-135%);
  mix-blend-mode: screen;
  pointer-events: none;
}

.splash-screen.is-ready .splash-logo::after {
  animation: logoLight 1.15s cubic-bezier(0.77, 0, 0.18, 1) 0.72s both;
}

.splash-logo img {
  width: 188px;
  height: auto;
  object-fit: contain;
  filter: brightness(0) invert(1) drop-shadow(0 18px 36px rgba(0, 0, 0, 0.22));
  clip-path: inset(0 100% 0 0);
}

.splash-screen.is-ready .splash-logo img {
  animation: logoReveal 0.98s cubic-bezier(0.22, 1, 0.36, 1) 0.34s both;
}

.splash-line {
  display: block;
  width: 0;
  height: 1px;
  background: rgba(242, 240, 234, 0.72);
}

.splash-screen.is-ready .splash-line {
  animation: lineGrow 0.82s cubic-bezier(0.22, 1, 0.36, 1) 0.82s both;
}

.splash-name {
  font-family: "Playfair Display", serif;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1;
  color: var(--cream);
  opacity: 0;
  transform: translateY(12px);
}

.splash-screen.is-ready .splash-name {
  animation: textRise 0.82s cubic-bezier(0.22, 1, 0.36, 1) 0.92s both;
}

.splash-subtitle {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(242, 240, 234, 0.62);
  font-weight: 900;
  opacity: 0;
  transform: translateY(10px);
  text-align: center;
}

.splash-screen.is-ready .splash-subtitle {
  animation: textRise 0.82s cubic-bezier(0.22, 1, 0.36, 1) 1.08s both;
}

@keyframes splashSweep {
  0% { transform: translateX(-115%) skewX(-10deg); }
  52% { transform: translateX(0%) skewX(-10deg); }
  100% { transform: translateX(115%) skewX(-10deg); }
}

@keyframes splashCardIn {
  0% { opacity: 0; transform: translateY(24px) scale(0.96); filter: blur(8px); }
  100% { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

@keyframes splashCardOut {
  0% { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
  100% { opacity: 0; transform: translateY(-18px) scale(1.035); filter: blur(7px); }
}

@keyframes logoReveal {
  0% { clip-path: inset(0 100% 0 0); transform: translateY(6px) scale(0.98); opacity: 0.65; }
  100% { clip-path: inset(0 0 0 0); transform: translateY(0) scale(1); opacity: 1; }
}

@keyframes logoLight {
  0% { transform: translateX(-135%); }
  100% { transform: translateX(135%); }
}

@keyframes lineGrow {
  0% { width: 0; opacity: 0; }
  100% { width: 210px; opacity: 1; }
}

@keyframes textRise {
  0% { opacity: 0; transform: translateY(12px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* HEADER */
.site-header {
  position: fixed;
  left: 50%;
  top: 24px;
  z-index: 200;
  width: min(1160px, calc(100% - 44px));
  min-height: 78px;
  padding: 14px 18px;
  display: grid;
  grid-template-columns: 160px 1fr 160px;
  align-items: center;
  gap: 18px;
  background: rgba(17, 19, 21, 0.82);
  border: 1px solid rgba(242, 240, 234, 0.13);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.20);
  backdrop-filter: blur(18px);
  transform: translateX(-50%);
  transition: transform 0.38s ease, opacity 0.38s ease, background 0.25s ease;
}

.site-header::after {
  content: "";
  display: block;
  width: 160px;
}

.site-header.is-hidden {
  transform: translateX(-50%) translateY(-150%);
  opacity: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand img {
  width: auto;
  height: 58px;
  max-width: 128px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
}

.nav a {
  position: relative;
  padding: 10px 0;
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 900;
  color: rgba(242, 240, 234, 0.72);
  transition: color 0.22s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 1px;
  background: var(--sand);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
}

.nav a:hover {
  color: var(--sand);
}

.nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* HERO */
.hero {
  min-height: 100svh;
  position: relative;
  display: flex;
  align-items: center;
  padding: 132px 8vw 72px;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("hero.png") center/cover no-repeat;
  transform: scale(1.015);
  animation: heroPhoto 18s ease-in-out infinite alternate;
}

@keyframes heroPhoto {
  from { transform: scale(1.015); }
  to { transform: scale(1.05); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 11, 12, 0.72), rgba(10, 11, 12, 0.30), rgba(10, 11, 12, 0.08)),
    linear-gradient(180deg, rgba(10, 11, 12, 0.20), rgba(10, 11, 12, 0.32));
}

.hero-content {
  width: min(560px, 100%);
  margin-left: clamp(0px, 3vw, 72px);
  padding: 42px;
  background: rgba(16, 18, 20, 0.72);
  border: 1px solid rgba(242, 240, 234, 0.14);
  color: var(--cream);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.eyebrow {
  color: var(--sand);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.hero h1,
.intro-text h2,
.section-head h2,
.split-content h2,
.contact-panel h2 {
  font-family: "Playfair Display", serif;
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.hero h1 {
  margin-top: 18px;
  font-size: clamp(44px, 6vw, 78px);
  max-width: 560px;
}

.hero p:not(.eyebrow) {
  max-width: 500px;
  margin-top: 20px;
  color: rgba(242, 240, 234, 0.78);
  font-size: 16px;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  min-height: 56px;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 900;
  transition: transform 0.22s ease, background 0.22s ease, color 0.22s ease, border-color 0.22s ease;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn-primary {
  background: var(--sand);
  color: var(--charcoal);
}

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

.btn-ghost {
  border-color: rgba(242, 240, 234, 0.24);
  background: rgba(255, 255, 255, 0.04);
  color: var(--cream);
}

.btn-ghost:hover {
  border-color: var(--sand);
  background: rgba(255, 255, 255, 0.10);
}

/* INTRO */
.intro {
  padding: 112px 8vw;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 72px;
  align-items: center;
  background: #101214;
}

.intro-media {
  position: relative;
}

.intro-media::before {
  content: "";
  position: absolute;
  inset: 24px -24px -24px 24px;
  border: 1px solid rgba(242, 240, 234, 0.16);
  z-index: -1;
}

.intro-media img {
  width: 100%;
  height: 620px;
  object-fit: cover;
  box-shadow: var(--shadow);
  filter: grayscale(18%);
}

.intro-text h2 {
  margin: 18px 0 26px;
  font-size: clamp(42px, 5.4vw, 78px);
}

.intro-text p:not(.eyebrow),
.section-head p,
.split-content p,
.offer-card p {
  color: var(--muted);
  line-height: 1.85;
  font-size: 16px;
}

.intro-text p + p {
  margin-top: 18px;
}

/* SECTIONS */
.section {
  padding: 108px 8vw;
}

.offer-section {
  background:
    radial-gradient(circle at 80% 0%, rgba(201, 185, 166, 0.10), transparent 30%),
    #17191c;
}

.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-head h2 {
  margin: 18px 0 20px;
  font-size: clamp(42px, 5.4vw, 76px);
}

.offer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.offer-card {
  min-height: 280px;
  padding: 34px 28px;
  background: rgba(242, 240, 234, 0.055);
  border: 1px solid rgba(242, 240, 234, 0.13);
  transition: transform 0.24s ease, background 0.24s ease, box-shadow 0.24s ease;
}

.offer-card:hover {
  transform: translateY(-8px);
  background: rgba(242, 240, 234, 0.08);
  box-shadow: var(--shadow);
}

.offer-card span,
.project-card span,
.process-list span,
.contact-grid span {
  color: var(--sand);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.offer-card h3 {
  margin: 38px 0 14px;
  font-size: 24px;
  line-height: 1.15;
}

/* PROJECTS */
.projects {
  background: #101214;
}

.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.filter-btn {
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid rgba(242, 240, 234, 0.18);
  background: transparent;
  color: rgba(242, 240, 234, 0.70);
  font: inherit;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: 0.22s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--sand);
  border-color: var(--sand);
  color: var(--charcoal);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.project-card {
  position: relative;
  height: 370px;
  overflow: hidden;
  cursor: pointer;
  background: #1b1e21;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.14);
}

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

.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease, filter 0.28s ease;
  filter: grayscale(16%);
}

.project-card:hover img {
  transform: scale(1.06);
  filter: grayscale(0%);
}

.project-card div {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  padding: 18px;
  background: rgba(16, 18, 20, 0.72);
  color: var(--cream);
  backdrop-filter: blur(10px);
}

.project-card h3 {
  margin-top: 8px;
  font-family: "Playfair Display", serif;
  font-size: 28px;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

/* PROCESS */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 720px;
  background: #191c1f;
}

.split-image img {
  width: 100%;
  height: 100%;
  min-height: 720px;
  object-fit: cover;
  filter: grayscale(18%);
}

.split-content {
  padding: 108px 8vw 108px 6vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    radial-gradient(circle at 100% 0%, rgba(201, 185, 166, 0.12), transparent 32%),
    #17191c;
}

.split-content h2 {
  margin: 18px 0 34px;
  font-size: clamp(42px, 5.2vw, 72px);
}

.process-list {
  display: grid;
  gap: 18px;
}

.process-list article {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid rgba(242, 240, 234, 0.14);
}

.process-list h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

/* CONTACT */
.contact-section {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  padding: 108px 8vw;
  overflow: hidden;
  isolation: isolate;
}

.contact-bg {
  position: absolute;
  inset: 0;
  background: url("budynekmieszkalny2.jpg") center/cover no-repeat;
  z-index: -3;
  filter: grayscale(18%);
}

.contact-section::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: linear-gradient(90deg, rgba(16, 18, 20, 0.88), rgba(16, 18, 20, 0.52), rgba(16, 18, 20, 0.18));
}

.contact-panel {
  width: min(780px, 100%);
  padding: 50px;
  background: rgba(16, 18, 20, 0.78);
  border: 1px solid rgba(242, 240, 234, 0.16);
  color: var(--cream);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.contact-panel h2 {
  margin: 18px 0 22px;
  font-size: clamp(42px, 5vw, 70px);
}

.contact-panel p {
  color: rgba(242, 240, 234, 0.76);
  line-height: 1.85;
  max-width: 620px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 12px;
  margin-top: 34px;
}

.contact-grid a {
  min-height: 105px;
  padding: 24px;
  border: 1px solid rgba(242, 240, 234, 0.14);
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: 0.22s ease;
}

.contact-grid a:hover {
  background: var(--sand);
  color: var(--charcoal);
}

.contact-grid a:hover span {
  color: var(--charcoal);
}

.contact-grid span {
  margin-bottom: 8px;
}

.contact-grid strong {
  font-size: 15px;
  overflow-wrap: anywhere;
}

/* FOOTER */
.footer {
  display: grid;
  grid-template-columns: 1.3fr 0.85fr 1fr;
  align-items: start;
  gap: 36px;
  padding: 54px 8vw 34px;
  background: #0c0d0e;
  color: rgba(242, 240, 234, 0.76);
}

.footer img {
  width: 130px;
  margin-bottom: 14px;
  filter: brightness(0) invert(1);
}

.footer p {
  line-height: 1.7;
}

.footer h4 {
  color: var(--cream);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer a {
  display: block;
  margin-bottom: 10px;
  color: rgba(242, 240, 234, 0.74);
  transition: 0.22s ease;
  overflow-wrap: anywhere;
}

.footer a:hover {
  color: var(--sand);
}

.footer-small {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(242, 240, 234, 0.54);
}

.footer-bottom {
  grid-column: 1 / -1;
  padding-top: 24px;
  border-top: 1px solid rgba(242, 240, 234, 0.12);
  color: rgba(242, 240, 234, 0.48);
  font-size: 13px;
}

/* LIGHTBOX */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(8, 9, 10, 0.92);
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: min(1180px, 94vw);
  max-height: 86vh;
  object-fit: contain;
}

.lightbox button {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 46px;
  height: 46px;
  border: none;
  background: var(--cream);
  color: var(--charcoal);
  font-size: 30px;
  cursor: pointer;
}

/* REVEAL */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* MOBILE */
@media (max-width: 1080px) {
  .site-header {
    top: 10px;
    left: 10px;
    right: 10px;
    width: auto;
    min-height: 0;
    padding: 12px 12px 13px;
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 10px;
    transform: none;
    border-radius: 0;
  }

  .site-header::after {
    display: none;
  }

  .site-header.is-hidden {
    transform: translateY(-145%);
    opacity: 0;
  }

  .brand {
    justify-self: center;
  }

  .brand img {
    width: auto;
    height: 50px;
    max-width: 128px;
  }

  .nav {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px 9px;
    overflow: visible;
  }

  .nav a {
    padding: 9px 11px;
    border: 1px solid rgba(242, 240, 234, 0.12);
    background: rgba(242, 240, 234, 0.06);
    font-size: 10px;
    letter-spacing: 0.11em;
  }

  .nav a::after {
    display: none;
  }

  .hero {
    min-height: 100svh;
    align-items: flex-end;
    padding: 154px 18px 44px;
  }

  .hero-bg {
    background-position: center;
  }

  .hero-content {
    width: 100%;
    margin-left: 0;
    padding: 32px 24px;
  }

  .hero h1 {
    font-size: clamp(42px, 12vw, 64px);
  }

  .hero p:not(.eyebrow) {
    font-size: 15.5px;
    line-height: 1.72;
  }

  .intro,
  .offer-grid,
  .projects-grid,
  .split-section,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .intro {
    padding: 84px 20px;
    gap: 44px;
  }

  .intro-media::before {
    inset: 16px -12px -16px 12px;
  }

  .intro-media img {
    height: 420px;
  }

  .section {
    padding: 84px 20px;
  }

  .offer-grid {
    gap: 14px;
  }

  .offer-card {
    min-height: auto;
  }

  .projects-grid {
    gap: 14px;
  }

  .project-card {
    height: 390px;
  }

  .split-section {
    min-height: 0;
  }

  .split-image img {
    min-height: 0;
    height: 460px;
  }

  .split-content {
    padding: 78px 20px;
  }

  .contact-section {
    min-height: 0;
    padding: 84px 20px;
  }

  .contact-section::after {
    background: rgba(16, 18, 20, 0.55);
  }

  .contact-panel {
    padding: 40px 26px;
  }

  .footer {
    grid-template-columns: 1fr;
    padding: 44px 20px 30px;
  }
}

@media (max-width: 520px) {
  .splash-card {
    padding: 28px 22px;
  }

  .splash-logo {
    width: 164px;
    min-height: 92px;
  }

  .splash-logo img {
    width: 154px;
  }

  .nav {
    gap: 7px;
  }

  .nav a {
    font-size: 9.5px;
    letter-spacing: 0.09em;
    padding: 9px 9px;
  }

  .hero {
    padding: 148px 14px 32px;
  }

  .hero-content {
    padding: 28px 20px;
  }

  .eyebrow {
    font-size: 11px;
    letter-spacing: 0.15em;
  }

  .btn {
    width: 100%;
  }

  .intro-text h2,
  .section-head h2,
  .split-content h2,
  .contact-panel h2 {
    font-size: 38px;
  }

  .intro-media img,
  .split-image img,
  .project-card {
    height: 310px;
  }

  .project-card div {
    left: 12px;
    right: 12px;
    bottom: 12px;
    padding: 15px;
  }

  .project-card h3 {
    font-size: 23px;
  }

  .contact-panel {
    padding: 34px 22px;
  }

  .contact-grid a {
    min-height: 96px;
  }
}