:root {
  --color-bg: #ffffff;
  --color-surface: #f5f5f5;
  --color-muted: #e8e6e1;
  --color-text: #000000;
  --color-text-soft: rgba(0, 0, 0, 0.68);
  --color-overlay: rgba(0, 0, 0, 0.55);
  --color-border: rgba(0, 0, 0, 0.12);
  --transition-base: cubic-bezier(0.19, 1, 0.22, 1);
  --nav-height: 95px;
  --anchor-offset: 24px;
  --container-max: 1200px;
  --project-slide-size: 1200px;
  --section-padding-block: clamp(90px, 16vh, 140px);
}

[data-theme='dark'] {
  --color-bg: #000000;
  --color-surface: #121212;
  --color-muted: #1a1a1a;
  --color-text: #f5f5f5;
  --color-text-soft: rgba(255, 255, 255, 0.72);
  --color-overlay: rgba(0, 0, 0, 0.5);
  --color-border: rgba(255, 255, 255, 0.16);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', 'Montserrat', 'Raleway', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}

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

ul {
  list-style: none;
}

section {
  position: relative;
  padding: var(--section-padding-block) 5vw;
  scroll-margin-top: calc(var(--nav-height) + var(--anchor-offset));
}

.section {
  background-color: var(--color-bg);
}

.section:nth-of-type(even) {
  background-color: var(--color-surface);
}

.section-heading {
  max-width: var(--container-max);
  margin: 0 auto 60px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.section-heading h2 {
  font-size: 48px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.about .section-heading h2 {
  font-size: 60px;
}

.divider {
  display: inline-block;
  width: 120px;
  height: 1px;
  background-color: var(--color-border);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5vw;
  z-index: 1000;
  backdrop-filter: blur(10px);
  transition: background-color 400ms var(--transition-base), box-shadow 400ms var(--transition-base);
}

.site-header.is-scrolled {
  background-color: rgba(197, 196, 192, 0.85);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

[data-theme='dark'] .site-header.is-scrolled {
  background-color: rgba(0, 0, 0, 0.8);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--color-text);
  text-decoration: none;
  transition: opacity 300ms var(--transition-base);
}

.logo:hover,
.logo:focus-visible {
  opacity: 0.82;
}

.logo img {
  width: 200px;
  height: 200px;
  object-fit: contain;
  display: block;
}

.logo span {
  display: block;
}

/* Hide brand text next to the logo on all pages; keep element for layout gap */
.site-header .logo span {
  font-size: 0;
  line-height: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 16px;
  letter-spacing: 0.04em;
}

.nav-links a {
  position: relative;
  padding: 6px 0;
  color: var(--color-text);
  transition: color 300ms var(--transition-base);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 400ms var(--transition-base);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

body[data-page='home'] .site-header:not(.is-scrolled) .nav-links a {
  color: #c2c1c1;
}

body[data-page='home'] .site-header:not(.is-scrolled) .nav-links a::after {
  background-color: #ffffff;
}

@media (max-width: 992px) {
  body[data-page='home'] .site-header:not(.is-scrolled) .main-nav.is-open .nav-links a {
    color: var(--color-text);
  }

  body[data-page='home'] .site-header:not(.is-scrolled) .main-nav.is-open .nav-links a::after {
    background-color: currentColor;
  }
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  gap: 6px;
  flex-direction: column;
  padding: 10px;
}

.nav-toggle-line {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 300ms var(--transition-base);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background-color: var(--color-bg);
}

[data-theme='dark'] .language-switch {
  border-color: rgba(255, 255, 255, 0.25);
  background-color: rgba(255, 255, 255, 0.04);
}

.lang-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: none;
  border-radius: 999px;
  background: none;
  cursor: pointer;
  font: inherit;
  font-size: 10px;
  font-family: inherit;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--color-text-soft);
  transition: background-color 300ms var(--transition-base), color 300ms var(--transition-base);
}

.lang-button.is-active {
  background-color: var(--color-muted);
  color: var(--color-text);
}

[data-theme='dark'] .lang-button.is-active {
  background-color: rgba(255, 255, 255, 0.12);
}

.lang-button:focus-visible {
  outline: 2px solid rgba(0, 0, 0, 0.4);
  outline-offset: 2px;
}

[data-theme='dark'] .lang-button:focus-visible {
  outline-color: rgba(255, 255, 255, 0.6);
}

.flag {
  font-size: inherit;
  line-height: 1;
  letter-spacing: inherit;
  font-weight: inherit;
}

.hero {
  min-height: 100vh;
  display: grid;
  align-items: end;
  justify-items: center;
  position: relative;
  padding: 0;
  color: #ffffff;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  background-color: #0f0f0f;
  background-size: cover;
  background-position: center;
  /* Sabit arkaplan GPU/paining maliyetini arttırıyor, jank yaratıyor */
  /* background-attachment: fixed; */
  transform: scale(1);
  transition: transform 1200ms var(--transition-base);
  overflow: hidden;
}

.hero-media-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  pointer-events: none;
  transition: opacity 320ms var(--transition-base);
}

.hero-media-fallback.is-hidden {
  opacity: 0;
}

.hero.is-active .hero-media {
  transform: scale(1.05);
}

.hero-media-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(1.05);
  transition: opacity 640ms var(--transition-base), transform 4200ms ease;
  will-change: opacity, transform;
  pointer-events: none;
  z-index: 1;
}

.hero-media-layer video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.hero-media-layer.is-visible {
  opacity: 1;
  transform: scale(1);
}

.hero-media-layer.is-initial {
  transition: none;
  opacity: 1;
  transform: scale(1);
}

.hero-media-layer.is-leaving {
  opacity: 0;
  transform: scale(1.035);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.68), rgba(0, 0, 0, 0.35));
  pointer-events: none;
}

.hero-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  background: rgba(0, 0, 0, 0.28);
  color: #ffffff;
  cursor: pointer;
  opacity: 0.65;
  transition: opacity 220ms ease, background-color 220ms ease, transform 220ms ease;
  z-index: 3;
}

.hero-nav span {
  font-size: 22px;
  line-height: 1;
  transform: translateY(-1px);
}

.hero-nav:hover,
.hero-nav:focus-visible {
  opacity: 1;
  background: rgba(0, 0, 0, 0.45);
}

.hero-nav:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.7);
  outline-offset: 4px;
}

.hero-nav:disabled {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.hero-nav--prev {
  left: 32px;
}

.hero-nav--next {
  right: 32px;
}

.hero-nav[hidden] {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  padding: calc(var(--nav-height) + 20px) 5vw 60px;
  text-align: left;
}

.hero h1 {
  font-size: clamp(44px, 6vw, 68px);
  font-weight: 500;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero-kicker {
  font-size: 16px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero-subtitle {
  font-size: 20px;
  line-height: 1.7;
  margin-bottom: 36px;
  color: rgba(255, 255, 255, 0.82);
}

.hero-button {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #ffffff;
  transition: transform 400ms var(--transition-base), background-color 400ms var(--transition-base);
}

.hero-button:hover {
  transform: translateY(-3px);
  background-color: rgba(255, 255, 255, 0.08);
}

.about {
  background-color: var(--color-surface);
}

.section.about {
  min-height: max(0px, calc(100vh - var(--nav-height) - (var(--section-padding-block) * 2)));
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(40px, 8vh, 72px);
}

.about .section-heading {
  width: 100%;
  max-width: min(1400px, 96vw);
  justify-content: flex-start;
  margin-left: auto;
  margin-right: auto;
  margin: 0 auto 0px;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  column-gap: 48px;
  row-gap: 24px;
  max-width: min(1360px, 96vw);
  margin: 0 auto;
  align-items: start;
}

.about-text h3 {
  font-size: 28px;
  margin-bottom: 24px;
}

.about-text p {
  font-size: 18px;
  margin-bottom: 18px;
  color: var(--color-text-soft);
  font-family: 'Montserrat', 'Poppins', 'Raleway', sans-serif;
  font-weight: 600;
}

.about-text blockquote {
  font-size: 32px;
  font-weight: 500;
  margin: 36px 0;
  border-left: 4px solid var(--color-border);
  padding-left: 24px;
  color: var(--color-text);
}

.about-media {
  display: flex;
  align-items: center;
  justify-self: end;
}

.about-media img {
  width: 100%;
  height: clamp(360px, 52vh, 300px);
  object-fit: cover;
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  max-width: var(--container-max);
  margin: 0 auto;
}

.project-card {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  aspect-ratio: 16 / 9;
  cursor: pointer;
  transform: translate3d(0, 0, 0);
  transition: transform 320ms var(--transition-base), box-shadow 360ms var(--transition-base);
  background-color: var(--color-muted);
  isolation: isolate;
  contain: layout paint;
  will-change: transform;
  content-visibility: auto;
}

.project-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-muted);
}

.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
  pointer-events: none;
  z-index: 2;
}

.project-card:hover {
  transform: translate3d(0, -8px, 0);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.16);
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 360ms var(--transition-base);
  transform: translateZ(0);
  will-change: transform;
  backface-visibility: hidden;
}

.project-card:hover .project-media img {
  transform: scale(1.03);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.65));
  color: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
  opacity: 0;
  transition: opacity 280ms ease;
  z-index: 1;
  will-change: opacity;
}

.project-card:hover .project-overlay,
.project-card:focus-within .project-overlay {
  opacity: 1;
}

.project-link {
  position: absolute;
  inset: 0;
  z-index: 3;
}


.contact-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 60px;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 20px;
}

.contact-form label {
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background-color: var(--color-bg);
  font-size: 16px;
  transition: border 300ms var(--transition-base), box-shadow 300ms var(--transition-base);
  color: var(--color-text);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 0 4px rgba(232, 230, 225, 0.6);
}

[data-theme='dark'] .contact-form input:focus,
[data-theme='dark'] .contact-form textarea:focus {
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.12);
}

.contact-form button {
  justify-self: start;
  padding: 14px 36px;
  border-radius: 999px;
  border: none;
  background-color: #000000;
  color: #ffffff;
  cursor: pointer;
  letter-spacing: 0.08em;
  transition: transform 400ms var(--transition-base), background-color 400ms var(--transition-base);
}

.contact-form button:hover {
  transform: translateY(-2px);
  background-color: #1f1f1f;
}

[data-theme='dark'] .contact-form button {
  background-color: #ffffff;
  color: #000000;
}

[data-theme='dark'] .contact-form button:hover {
  background-color: #e8e6e1;
}

.contact-info h3 {
  font-size: 28px;
  margin-bottom: 16px;
}

.contact-info p {
  color: var(--color-text-soft);
  margin-bottom: 22px;
}

.contact-info ul {
  display: grid;
  gap: 12px;
}

.contact-info strong {
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-right: 6px;
}

.map-wrapper {
  max-width: var(--container-max);
  margin: 60px auto 0;
  border-radius: 18px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
}

.map-wrapper iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.map-placeholder {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 320px;
  border-radius: inherit;
  background: #f5f5f0;
  border: 1px solid rgba(0, 0, 0, 0.06);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  color: #4a4a4a;
}

.map-placeholder iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  z-index: 0;
}

.map-placeholder__message {
  font-size: 0.95rem;
  line-height: 1.3;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
}

.map-placeholder--is-loaded .map-placeholder__message {
  opacity: 0;
  transition: opacity 0.3s ease;
}

#firebaseVisitorWidget {
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 9999;
  max-width: 220px;
  max-height: 120px;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  padding: 6px 10px;
  border-radius: 12px;
  font-size: 0.82rem;
  line-height: 1.4;
  box-shadow: 0 12px 18px rgba(0, 0, 0, 0.35);
  pointer-events: none;
  user-select: none;
  content-visibility: auto;
  contain: content;
}

#firebaseVisitorWidget .divider {
  opacity: 0.6;
  margin: 0 6px;
}

.project-detail {
  padding-top: calc(var(--nav-height) + 40px);
  background-color: var(--color-bg);
}

.project-hero {
  position: relative;
  width: min(1400px, 96vw);
  margin: clamp(32px, 6vw, 72px) auto 0;
  border-radius: 0;
  overflow: visible;
  background: none;
  box-shadow: none;
  --project-slide-width: var(--project-slide-size);
  --project-slider-nav-inset: clamp(18px, 3vw, 36px);
}

.project-slider-viewport {
  position: relative;
  width: var(--project-slide-width, var(--project-slide-size));
  max-width: 100%;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
}

.project-slider-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.project-slide {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--project-slide-width, var(--project-slide-size));
  aspect-ratio: 16 / 9;
  transform: translate(-50%, -50%) scale(0.94);
  opacity: 0;
  visibility: hidden;
  filter: blur(12px);
  pointer-events: none;
  transition: opacity 520ms var(--transition-base), transform 520ms var(--transition-base), filter 520ms var(--transition-base);
  z-index: 1;
}

.project-slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
  filter: none;
  pointer-events: auto;
  z-index: 3;
}

.project-slide.is-exiting {
  opacity: 0;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1.03);
  filter: blur(18px);
  pointer-events: none;
  z-index: 2;
}

.project-slide.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  filter: blur(12px);
}

.project-slide-media {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 18px;
  overflow: hidden;
  transform-origin: center;
  transform: scale(1);
  box-shadow: none;
  transition: box-shadow 520ms var(--transition-base);
}

.project-slide picture,
.project-slide img,
.project-slide video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.project-slide.is-active .project-slide-media {
  box-shadow: 0 48px 140px rgba(0, 0, 0, 0.24);
}

.project-slide.is-exiting .project-slide-media {
  box-shadow: none;
}

.project-slide-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 70%, rgba(0, 0, 0, 0.22) 100%);
  opacity: 0;
  transition: opacity 520ms var(--transition-base);
  pointer-events: none;
}

.project-slide.is-active .project-slide-media::after {
  opacity: 1;
}

.project-slide-media--video::after {
  display: none;
}

.project-slider-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: clamp(44px, 5vw, 56px);
  height: clamp(44px, 5vw, 56px);
  border-radius: 999px;
  border: none;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.5);
  color: #ffffff;
  cursor: pointer;
  z-index: 5;
  transition: background-color 240ms ease, opacity 240ms ease, transform 240ms ease;
}

.project-slider-nav span {
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1;
}

.project-slider-nav--prev {
  left: calc(50% - (var(--project-slide-width, var(--project-slide-size)) / 2) + var(--project-slider-nav-inset));
}

.project-slider-nav--next {
  right: calc(50% - (var(--project-slide-width, var(--project-slide-size)) / 2) + var(--project-slider-nav-inset));
}

.project-slider-nav:hover,
.project-slider-nav:focus-visible {
  background: rgba(0, 0, 0, 0.68);
}

.project-slider-nav:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.7);
  outline-offset: 3px;
}

.project-slider-nav[disabled],
.project-slider-nav[aria-disabled='true'] {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.project-hero:not(.has-multiple-slides) .project-slider-nav {
  opacity: 0;
  pointer-events: none;
}

.project-hero.is-single-column .project-slide.is-active .project-slide-media {
  box-shadow: 0 32px 76px rgba(0, 0, 0, 0.25);
}

@media (max-width: 900px) {
  .project-hero {
    margin-top: clamp(24px, 5vw, 48px);
  }
}

@media (max-width: 640px) {
  .project-slider-nav {
    width: 40px;
    height: 40px;
  }

  .project-slider-nav span {
    font-size: 20px;
  }
}

.project-shell {
  width: min(1100px, 90vw);
  margin: 80px auto;
  display: grid;
  gap: 60px;
}

.project-header {
  display: grid;
  gap: 24px;
}

.project-title {
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 500;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  font-size: 16px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.project-summary {
  font-size: 20px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.project-body {
  display: grid;
  gap: 40px;
}

.project-body h3 {
  font-size: 28px;
}

.project-body p {
  font-size: 18px;
  color: var(--color-text-soft);
}

.project-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.gallery-item {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  cursor: pointer;
  transition: transform 400ms var(--transition-base), box-shadow 400ms var(--transition-base);
}

.gallery-item--video {
  cursor: default;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 500ms var(--transition-base);
}

.gallery-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  background-color: #000000;
  transition: transform 500ms var(--transition-base);
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.16);
}

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

.lightbox {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 40px;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  width: 52px;
  height: 52px;
  margin: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background-color: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  display: grid;
  place-items: center;
  cursor: pointer;
  transform: translateY(-50%);
  transition: transform 250ms var(--transition-base), opacity 200ms var(--transition-base);
  opacity: 0;
  pointer-events: none;
  z-index: 2010;
}

.lightbox--has-multiple .lightbox-nav {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-nav--prev {
  left: clamp(16px, 4vw, 36px);
}

.lightbox-nav--next {
  right: clamp(16px, 4vw, 36px);
}

.lightbox-nav span {
  font-size: 22px;
  line-height: 1;
}

.lightbox-nav:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 4px;
  transform: translateY(-50%) scale(1.02);
}

.lightbox-nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

.lightbox-nav:hover:not(:disabled) {
  transform: translateY(-50%) scale(1.05);
}

@media (max-width: 640px) {
  .lightbox-nav {
    width: 44px;
    height: 44px;
  }

  .lightbox-nav--prev {
    left: 14px;
  }

  .lightbox-nav--next {
    right: 14px;
  }
}

.lightbox.is-open {
  display: flex;
}

.lightbox img {
  max-width: min(1200px, 90vw);
  max-height: 80vh;
  border-radius: 12px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.4);
}

.lightbox-close {
  position: absolute;
  top: 40px;
  right: 40px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background-color: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: transform 300ms var(--transition-base);
}

.lightbox-close span {
  font-size: 24px;
  color: #ffffff;
}

.lightbox-close:hover {
  transform: rotate(90deg);
}

[data-theme='dark'] .project-card::after {
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme='dark'] .project-hero,
[data-theme='dark'] .gallery-item:hover {
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}

[data-theme='dark'] .project-slider-nav {
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
}

[data-theme='dark'] .project-slider-nav:hover,
[data-theme='dark'] .project-slider-nav:focus-visible {
  background: rgba(255, 255, 255, 0.28);
}

[data-theme='dark'] .contact-form input,
[data-theme='dark'] .contact-form textarea {
  background-color: var(--color-muted);
  border-color: rgba(255, 255, 255, 0.1);
}

.site-footer {
  padding: 48px 5vw;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: grid;
  place-items: center;
  transition: background-color 300ms var(--transition-base), transform 300ms var(--transition-base);
}

.footer-links a svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: var(--color-text);
  stroke-width: 1.6;
}

.footer-links a:hover {
  background-color: var(--color-muted);
  transform: translateY(-4px);
}

.site-footer p {
  font-size: 14px;
  letter-spacing: 0.08em;
}

[data-theme='dark'] .footer-links a svg {
  stroke: #f5f5f5;
}

[data-theme='dark'] .footer-links a:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

[data-theme='dark'] .hero {
  color: #ffffff;
}

[data-animate] {
  opacity: 1;
  transform: none;
  transition: opacity 800ms var(--transition-base), transform 800ms var(--transition-base);
}

[data-animate='fade-stagger'] {
  transition-delay: var(--stagger-delay, 0ms);
}

@media (max-width: 992px) {
  :root {
    --section-padding-block: clamp(80px, 18vh, 120px);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: calc(var(--nav-height) + 10px);
    right: 5vw;
    flex-direction: column;
    padding: 24px;
    background-color: rgba(232, 230, 225, 0.96);
    border-radius: 14px;
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.12);
    transform-origin: top right;
    transform: scale(0.9);
    opacity: 0;
    pointer-events: none;
    transition: opacity 300ms ease, transform 300ms ease;
  }

  [data-theme='dark'] .nav-links {
    background-color: rgba(0, 0, 0, 0.92);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
  }

  .main-nav.is-open .nav-links {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 10px 0;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .about-media img {
    height: auto;
  }

  .section.about {
    min-height: auto;
    display: block;
  }

  .header-actions {
    gap: 10px;
  }

  .language-switch {
    order: -1;
  }

  .hero-nav {
    width: 42px;
    height: 42px;
  }

  .hero-nav--prev {
    left: 24px;
  }

  .hero-nav--next {
    right: 24px;
  }


  .section-heading h2 {
    font-size: 40px;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 0 24px;
  }

  .logo {
    gap: 12px;
    letter-spacing: 0.18em;
  }

  .logo img {
    width: 170px;
    height: 170px;
  }

  .language-switch {
    gap: 6px;
  }

  .lang-button {
    padding: 6px 10px;
  }

  :root {
    --section-padding-block: 72px;
  }

  section {
    padding: var(--section-padding-block) 24px;
  }

  .hero-content {
    padding: calc(var(--nav-height) + 20px) 24px 48px;
  }

  .hero-nav {
    width: 38px;
    height: 38px;
  }

  .hero-nav span {
    font-size: 18px;
  }

  .hero-nav--prev {
    left: 18px;
  }

  .hero-nav--next {
    right: 18px;
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }


  .section-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .project-shell {
    margin: 60px auto;
    gap: 40px;
  }

  .project-meta {
    gap: 18px;
  }

  .lightbox {
    padding: 24px;
  }

  .divider {
    width: 80px;
  }
}

@media (max-width: 540px) {
  .hero h1 {
    font-size: 38px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .contact-form button {
    width: 100%;
    justify-self: stretch;
  }

  .hero-nav {
    width: 34px;
    height: 34px;
  }

  .hero-nav span {
    font-size: 16px;
  }

  .hero-nav--prev {
    left: 12px;
  }

  .hero-nav--next {
    right: 12px;
  }

  .project-hero {
    width: 100%;
    border-radius: 14px;
  }

  .logo img {
    width: 110px;
    height: 110px;
  }

  .project-meta {
    flex-direction: column;
    gap: 12px;
  }

  .project-gallery {
    grid-template-columns: 1fr;
  }

  .site-footer {
    padding: 40px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.submission-popup {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 260ms var(--transition-base), visibility 260ms var(--transition-base);
  z-index: 1400;
}

.submission-popup.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.submission-popup__panel {
  position: relative;
  width: min(520px, calc(100% - 32px));
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 28px 28px 26px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.2);
  transform: translateY(12px);
  opacity: 0;
  transition: transform 320ms var(--transition-base), opacity 320ms var(--transition-base);
}

.submission-popup.is-visible .submission-popup__panel {
  transform: translateY(0);
  opacity: 1;
}

.submission-popup__close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: inherit;
  font-size: 20px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background-color 220ms var(--transition-base), transform 220ms var(--transition-base),
    border-color 220ms var(--transition-base);
}

.submission-popup__close:hover,
.submission-popup__close:focus-visible {
  background-color: var(--color-muted);
  border-color: rgba(0, 0, 0, 0.22);
  outline: none;
  transform: translateY(-1px);
}

[data-theme='dark'] .submission-popup__close:hover,
[data-theme='dark'] .submission-popup__close:focus-visible {
  border-color: rgba(255, 255, 255, 0.5);
}

.submission-popup__kicker {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  margin-bottom: 10px;
}

.submission-popup__title {
  font-size: 26px;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.submission-popup__text {
  color: var(--color-text-soft);
  line-height: 1.8;
  max-width: 46ch;
}

.contact-links {
  display: grid;
  gap: 16px;
}

.contact-links li,
.contact-icon-link {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 16px;
  color: var(--color-text-soft);
}

.contact-links a {
  color: inherit;
  transition: color 300ms var(--transition-base);
}

.contact-links a:hover,
.contact-links a:focus-visible {
  color: var(--color-text);
}

.contact-links address {
  font-style: normal;
  line-height: 1.7;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transition: border 300ms var(--transition-base), background-color 300ms var(--transition-base);
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: var(--color-text);
  stroke-width: 1.6;
}

.contact-icon-link:hover .contact-icon,
.contact-icon-link:focus-visible .contact-icon {
  border-color: rgba(0, 0, 0, 0.3);
  background-color: var(--color-muted);
}

[data-theme='dark'] .contact-icon {
  border-color: rgba(255, 255, 255, 0.3);
}

[data-theme='dark'] .contact-icon svg {
  stroke: #f5f5f5;
}

[data-theme='dark'] .contact-icon-link:hover .contact-icon,
[data-theme='dark'] .contact-icon-link:focus-visible .contact-icon {
  border-color: rgba(255, 255, 255, 0.6);
  background-color: rgba(255, 255, 255, 0.08);
}