/* iNARA Creative Studio | Stylesheet for Single Scrolling Page */

.studio-body {
  background-color: var(--void);
  color: var(--paper);
  margin: 0;
  font-family: var(--ff-body);
}

.studio-main {
  padding: 80px 24px;
  max-width: 800px;
  margin: 0 auto;
  min-height: 100vh;
}

/* PLACEHOLDER IMAGE */
.studio-placeholder-container {
  width: 100%;
  margin-bottom: 48px;
}

.studio-placeholder-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  display: block;
}

/* 1. HERO SECTION */
.hero-section {
  margin-bottom: 48px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.logo-container {
  margin-bottom: 24px;
}

.studio-hero-logo {
  height: 48px;
  width: auto;
  filter: invert(1) brightness(0.95);
  display: block;
}

.triple-rule {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 32px;
}

.triple-rule .line {
  display: block;
  height: 1px;
  background-color: var(--border);
  width: 100%;
}

.intro-container {
  width: 100%;
}

.intro-paragraph {
  font-family: var(--ff-body);
  font-size: 20px;
  line-height: 1.6;
  font-weight: 300;
  color: var(--paper);
  margin: 0;
  text-align: left;
}

/* 2. WORK SECTION */
.work-section {
  margin-bottom: 48px;
}

.client-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px; /* Tightly grouped vertical list matching the reference */
}

.client-list-item {
  font-family: var(--ff-body);
  font-size: 24px; /* Dense, prominent size matching the reference */
  line-height: 1.15;
  font-weight: 600; /* Bold sans-serif styling matching reference */
  color: var(--white);
  letter-spacing: -0.02em; /* Tight letter spacing */
  text-align: left;
}

.client-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.group-title {
  color: var(--white);
}

.client-sublist {
  list-style: none;
  padding: 0;
  margin: 2px 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 16px; /* Indent sub-list items slightly */
}

.client-sublist li {
  font-size: 19px; /* Hierarchy styling */
  color: var(--white); /* White text for sublist items */
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

/* 3. RESEARCH SECTION */
.research-section {
  margin-top: 0;
  padding-top: 48px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.research-section::before {
  content: "RESEARCH";
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.20em;
  color: var(--lotus);
  margin-bottom: 24px;
  display: block;
  font-weight: 500;
}

.research-paragraph {
  font-family: var(--ff-body);
  font-size: 18px;
  line-height: 1.6;
  font-weight: 300;
  color: var(--ghost);
  max-width: 640px;
  margin: 0;
}

/* 4. BACK TO TOP FLOATING BUTTON */
.back-to-top-btn {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--lotus);
  color: var(--void);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  transition: background-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-base), visibility var(--transition-base);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.back-to-top-btn:hover {
  background-color: var(--white);
  transform: translateY(-2px);
}

.back-to-top-btn:active {
  transform: translateY(0);
}

.back-to-top-btn svg {
  width: 20px;
  height: 20px;
}

/* RESPONSIVE LAYOUT */
@media (max-width: 768px) {
  .studio-main {
    padding: 48px 16px;
  }
  
  .studio-placeholder-container {
    margin-bottom: 32px;
  }

  .hero-section {
    margin-bottom: 32px;
  }
  
  .intro-paragraph {
    font-size: 18px;
  }
  
  .work-section {
    margin-bottom: 32px;
  }
  
  .client-list-item {
    font-size: 19px;
  }
  
  .client-sublist li {
    font-size: 16px;
  }
  
  .research-section {
    margin-top: 0;
    padding-top: 32px;
  }
  
  .research-paragraph {
    font-size: 16px;
  }
  
  .back-to-top-btn {
    bottom: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
  }
  
  .back-to-top-btn svg {
    width: 16px;
    height: 16px;
  }
}