/* ============================================================
   STUDIO Butter — Shared Components
   ============================================================
   Buttons, Cards, Tabs, Section Titles
   ============================================================ */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 1em 2.4em;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  border-radius: 0;
  transition:
    background-color var(--duration-normal) var(--ease-out),
    color var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary: solid accent */
.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border: 1px solid var(--color-accent);
}

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

/* Outline: transparent with border */
.btn-outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

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

/* Ghost: minimal, text-only with subtle hover */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: none;
  padding: 0.6em 1em;
}

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

/* Arrow link */
.btn-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75em;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  transition: color var(--duration-normal) var(--ease-out);
  border: none;
  background: none;
  cursor: pointer;
}

.btn-arrow::after {
  content: '→';
  transition: transform var(--duration-normal) var(--ease-out);
}

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

.btn-arrow:hover::after {
  transform: translateX(4px);
}


/* ---- Section Title Block ---- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header__label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.section-header__title {
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  font-size: var(--fs-section-title);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  color: var(--color-text-primary);
}

.section-header__separator {
  width: 40px;
  height: 1px;
  background-color: var(--color-accent);
  border: none;
  margin: var(--space-md) auto 0;
}


/* ---- Tabs ---- */
.tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.tab-btn {
  font-family: var(--font-display);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 0.5em 0;
  border: none;
  background: none;
  cursor: pointer;
  position: relative;
  transition: color var(--duration-normal) var(--ease-out);
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-out);
}

.tab-btn:hover {
  color: var(--color-text-secondary);
}

.tab-btn.is-active {
  color: var(--color-accent);
}

.tab-btn.is-active::after {
  width: 100%;
}


/* ---- Work Cards ---- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xs);
}

.work-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
}

.work-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.work-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.8) 0%,
    rgba(10, 10, 10, 0) 60%
  );
  display: flex;
  align-items: flex-end;
  padding: var(--space-md);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.work-card__caption {
  font-family: var(--font-display);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-text-primary);
}

.work-card:hover .work-card__image {
  transform: scale(1.05);
}

.work-card:hover .work-card__overlay {
  opacity: 1;
}

/* ---- Feature Number ---- */
.feature-number {
  font-family: var(--font-display);
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-ultra);
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

/* ---- Price Table ---- */
.price-table {
  width: 100%;
  border-collapse: collapse;
}

.price-table th,
.price-table td {
  text-align: left;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  font-weight: var(--fw-light);
}

.price-table th {
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-normal);
}

.price-table td {
  color: var(--color-text-primary);
  font-size: var(--fs-small);
}

.price-table td:last-child {
  text-align: right;
  font-family: var(--font-display);
  letter-spacing: var(--ls-wide);
}


/* ---- Responsive: Work Grid ---- */
@media (max-width: 768px) {
  .work-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .work-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   CTA SECTION (Bottom Common)
   ============================================================ */
.cta-section {
  position: relative;
  padding: var(--space-4xl) 0;
  text-align: center;
  background: linear-gradient(
    180deg,
    var(--color-bg) 0%,
    var(--color-bg-elevated) 40%,
    var(--color-bg-surface) 100%
  );
  overflow: hidden;
}

/* Subtle decorative line */
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 80px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--color-accent)
  );
}

.cta-section__title {
  font-family: var(--font-body);
  font-weight: var(--fw-thin);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.cta-section__subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2xl);
}

.cta-section .btn-primary {
  font-size: var(--fs-body);
  padding: 1.2em 3em;
}

@media (max-width: 768px) {
  .cta-section {
    padding: var(--space-3xl) 0;
  }
}