:root {
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-text-secondary: #666666;
  --color-light-gray: #f6f6f6;
  --color-border: #ececec;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --max-width: 1100px;
  --nav-height: 64px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-fast: 0.15s ease;
  --transition: 0.3s ease;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-bg);
  background: var(--color-text);
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-align: center;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.btn--sm {
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
}

.section__title {
  font-size: 1.5rem;
  font-weight: 500;
  text-align: center;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

/* ---------- header ---------- */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-bg);
  transition: box-shadow var(--transition);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.nav__logo {
  display: flex;
  align-items: center;
  transition: opacity var(--transition-fast);
}

.nav__logo:hover,
.nav__logo:focus-visible {
  opacity: 0.7;
}

.nav__logo:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 4px;
  border-radius: var(--border-radius-sm);
}

.nav__logo img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.nav__links {
  display: none;
  gap: var(--spacing-sm);
  align-items: center;
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 450;
  color: var(--color-text);
  padding: 0.4rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-text);
  transition: width var(--transition-fast);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__link--cta {
  background: var(--color-text);
  color: var(--color-bg);
  padding: 0.45rem 1.2rem;
  border-radius: 9999px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav__link--cta:hover,
.nav__link--cta:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav__link--cta::after {
  display: none;
}

.nav__link:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 4px;
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 101;
}

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }
}

.nav__toggle:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 4px;
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__toggle--open .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle--open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle--open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- mobile nav ---------- */

.nav__mobile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.nav__mobile--open {
  opacity: 1;
  pointer-events: auto;
}

.nav__mobile .nav__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.nav__mobile .nav__link {
  font-size: 1.2rem;
}

.nav__mobile .nav__link--cta {
  font-size: 1.2rem;
  padding: 0.7rem 2rem;
}

/* ---------- hero ---------- */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--nav-height) var(--spacing-sm) var(--spacing-md);
  text-align: center;
  position: relative;
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.hero__logo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin-bottom: var(--spacing-xs);
}

@media (min-width: 768px) {
  .hero__logo {
    width: 160px;
    height: 160px;
  }
}

.hero__title {
  font-size: 2.4rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: 3.2rem;
  }
}

.hero__subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

@media (min-width: 768px) {
  .hero__subtitle {
    font-size: 1.1rem;
  }
}

.hero__scroll {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
}

.hero__scroll-arrow {
  display: block;
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--color-text-secondary);
  border-bottom: 2px solid var(--color-text-secondary);
  transform: rotate(45deg);
  animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
  0%, 100% {
    transform: rotate(45deg) translateY(0);
    opacity: 0.6;
  }
  50% {
    transform: rotate(45deg) translateY(6px);
    opacity: 1;
  }
}

/* ---------- about ---------- */

.about {
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.about__text {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-text);
}

@media (min-width: 768px) {
  .about__text {
    font-size: 1.4rem;
  }
}

/* ---------- gallery ---------- */

.gallery {
  padding: var(--spacing-lg) 0 var(--spacing-xl);
}

.gallery__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

@media (min-width: 480px) {
  .gallery__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .gallery__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
}

@media (min-width: 1100px) {
  .gallery__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.gallery__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  cursor: pointer;
  aspect-ratio: 1 / 1;
  background: var(--color-light-gray);
}

.gallery__item:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.gallery__item:hover img,
.gallery__item:focus-visible img {
  transform: scale(1.05);
}

.gallery__item:nth-child(3n + 1) {
  aspect-ratio: 3 / 4;
}

.gallery__item:nth-child(5n + 2) {
  aspect-ratio: 3 / 4;
}

/* ---------- contact ---------- */

.contact {
  padding: var(--spacing-lg) 0 var(--spacing-xl);
  background: var(--color-light-gray);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  text-align: center;
}

@media (min-width: 768px) {
  .contact__grid {
    grid-template-columns: repeat(3, 1fr);
    text-align: left;
  }

  .contact__item {
    align-items: flex-start;
  }
}

.contact__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: center;
}

.contact__label {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: lowercase;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
  margin-bottom: 0.25rem;
}

.contact__value {
  font-size: 0.95rem;
  line-height: 1.6;
}

.contact__link {
  color: var(--color-text);
  transition: opacity var(--transition-fast);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-border);
}

.contact__link:hover,
.contact__link:focus-visible {
  opacity: 0.7;
}

.contact__link:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- footer ---------- */

.footer {
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--color-border);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.footer__link {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  transition: opacity var(--transition-fast);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-border);
}

.footer__link:hover,
.footer__link:focus-visible {
  opacity: 0.7;
}

.footer__link:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.lightbox--open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: none;
  border: none;
  color: #ffffff;
  font-size: 2rem;
  cursor: pointer;
  z-index: 201;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: opacity var(--transition-fast);
}

.lightbox__close:hover,
.lightbox__close:focus-visible {
  opacity: 0.7;
}

.lightbox__close:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

.lightbox__image {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--border-radius-sm);
}

/* ---------- animations ---------- */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- privacy page ---------- */

.privacy {
  padding: calc(var(--nav-height) + var(--spacing-lg)) 0 var(--spacing-xl);
}

.privacy__title {
  font-size: 1.8rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
}

.privacy__content {
  max-width: 680px;
}

.privacy__content h2 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.privacy__content p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.privacy__content a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-border);
  transition: opacity var(--transition-fast);
}

.privacy__content a:hover,
.privacy__content a:focus-visible {
  opacity: 0.7;
}

.privacy__content a:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- utils ---------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body.no-scroll {
  overflow: hidden;
}