/* ===================================
   BOTÃO FLUTUANTE DE VOLTAR
=================================== */
.btn-back {
  position: fixed;
  top: 50%;
  left: 2rem;
  transform: translateY(-50%);
  z-index: 90;
  width: 4.4rem;
  height: 4.4rem;
  border-radius: 50%;
  background: rgba(18, 22, 15, 0.72);
  border: 1px solid rgba(138, 148, 112, 0.35);
  color: var(--color-stone);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  text-decoration: none;
  transition: background var(--transition-base), border-color var(--transition-base),
              transform var(--transition-fast), box-shadow var(--transition-base);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
}

.btn-back:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-50%) translateX(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

@media (max-width: 767px) {
  .btn-back {
    left: 1rem;
    width: 4rem;
    height: 4rem;
  }
}

/* ===================================
   PROJETO INDIVIDUAL — estilos específicos
=================================== */

/* Hero do projeto */
.proj-hero {
  position: relative;
  height: 70vh;
  min-height: 48rem;
  max-height: 72rem;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.proj-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.proj-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(18, 22, 15, 0.92) 0%,
    rgba(18, 22, 15, 0.45) 50%,
    rgba(18, 22, 15, 0.15) 100%
  );
}

.proj-hero__content {
  position: relative;
  z-index: 1;
  padding-bottom: var(--space-4xl);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}

.proj-hero__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 1.3rem;
  font-weight: var(--weight-medium);
  color: rgba(250, 248, 244, 0.65);
  text-decoration: none;
  margin-bottom: var(--space-xs);
  transition: color var(--transition-fast);
}

.proj-hero__back:hover {
  color: var(--color-stone);
}

.proj-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5vw, 5rem);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: var(--tracking-snug);
  line-height: var(--leading-display);
  max-width: 72rem;
}

.proj-hero__loc {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1.4rem;
  color: rgba(250, 248, 244, 0.6);
}

/* Conteúdo do projeto */
.proj-content {
  background: var(--color-white);
  padding: var(--space-5xl) 0;
}

.proj-content__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4xl);
}

@media (min-width: 1024px) {
  .proj-content__grid {
    grid-template-columns: 1fr 34rem;
    align-items: start;
  }
}

.proj-content__main h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 2.5vw, 2.6rem);
  font-weight: var(--weight-semibold);
  color: var(--color-forest);
  letter-spacing: var(--tracking-snug);
  margin-bottom: var(--space-md);
  margin-top: var(--space-3xl);
}

.proj-content__main h2:first-child {
  margin-top: 0;
}

.proj-content__main p {
  font-size: var(--text-body);
  color: var(--color-ink);
  line-height: var(--leading-body);
  margin-bottom: var(--space-md);
}

.proj-content__list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.proj-content__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: var(--text-body);
  color: var(--color-ink);
  line-height: var(--leading-body);
}

.proj-content__list li i {
  color: var(--color-primary);
  margin-top: 3px;
  flex-shrink: 0;
}

/* Card lateral de detalhes */
.proj-content__aside {
  position: sticky;
  top: calc(80px + var(--space-xl));
}

.proj-aside-card {
  background: var(--color-stone);
  border: 1px solid rgba(46, 50, 36, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
}

.proj-aside-card h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: var(--weight-semibold);
  color: var(--color-forest);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(46, 50, 36, 0.1);
}

.proj-aside-card__list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.proj-aside-card__list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.proj-aside-card__label {
  font-size: 1.1rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-overline);
  color: var(--color-mist);
}

.proj-aside-card__val {
  font-size: 1.5rem;
  color: var(--color-deep);
  font-weight: var(--weight-medium);
}

/* Seção de outros projetos */
.proj-related {
  background: var(--color-stone);
  padding: var(--space-5xl) 0;
}

.proj-related__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: var(--weight-semibold);
  color: var(--color-forest);
  letter-spacing: var(--tracking-snug);
  margin-bottom: var(--space-2xl);
}