/* ===== Navigation ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow var(--transition-base);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}

.nav__logo {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-transform: none;
}

.nav__logo-dot {
  color: var(--color-accent);
}

.nav__right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav__links {
  display: flex;
  gap: var(--space-md);
}

.nav__link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-black);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__link.is-active {
  color: var(--color-black);
}

.nav__link.is-active::after {
  transform: scaleX(1);
}

/* ===== Hamburger Menu ===== */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  z-index: 110;
  padding: 2px;
}
.nav__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-black);
  border-radius: 2px;
  transition: all 0.3s ease;
}
/* Animate to X when open */
.nav__hamburger.is-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger.is-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 640px) {
  .nav__hamburger {
    display: flex;
  }
  .nav__right {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100dvh;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 105;
  }
  .nav__right.is-open {
    transform: translateX(0);
  }
  .nav__links {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 30px;
  }
  .nav__link {
    font-size: clamp(20px, 6vw, 2rem);
    font-weight: 500;
  }
  .nav__right .btn {
    font-size: clamp(16px, 4.5vw, 1.25rem);
    padding: 1rem 2.5rem;
  }
}

/* ===== Project Card ===== */
.project-card {
  display: block;
}

.project-card + .project-card {
  margin-top: var(--space-lg);
}

.project-card__image {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background-color: var(--color-gray-100);
  aspect-ratio: 16 / 10;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08), 0 8px 40px rgba(0,0,0,0.04);
}

.project-card__image img,
.project-card__image svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card__image > * {
  transition: transform var(--transition-base);
}

.project-card:hover .project-card__image > * {
  transform: scale(1.02);
}

.project-card__content {
  margin-top: var(--space-sm);
}

.project-card__title {
  font-size: var(--font-size-xl);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.project-card:hover .project-card__title {
  color: var(--color-gray-600);
}

.project-card__description {
  margin-top: 0.25rem;
  color: var(--color-gray-600);
  font-size: var(--font-size-base);
}

.project-card__meta {
  margin-top: 0.5rem;
  display: flex;
  gap: var(--space-sm);
}

/* ===== Tags ===== */
.tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
  background-color: var(--color-gray-100);
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  letter-spacing: 0.03em;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  border-radius: 100px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

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

.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

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

.btn--large {
  font-size: var(--font-size-base);
  padding: 0.875rem 2rem;
}

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

.btn--white:hover {
  background-color: var(--color-gray-200);
}

/* ===== Colored Sections ===== */
.section--accent {
  background-color: var(--color-accent-bg);
}

.section--gray {
  background-color: var(--color-gray-100);
}

.section--dark {
  background-color: var(--color-black);
  color: var(--color-white);
}

.section--dark .cta-band__text {
  color: var(--color-gray-400);
}

/* ===== CTA Band ===== */
.cta-band {
  padding: var(--space-xl) 0;
  text-align: center;
}

.cta-band__heading {
  font-size: clamp(1.5rem, 3vw, var(--font-size-2xl));
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.cta-band__text {
  color: var(--color-gray-600);
  margin-bottom: var(--space-md);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Footer ===== */
.footer {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-md);
  border-top: var(--border-light);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links {
  display: flex;
  gap: var(--space-md);
}

.footer__link {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-black);
}

.footer__copy {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1),
              transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

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