/* portfolio.css - Portfolio / Case Studies Masonry Showcase Section */

.portfolio {
  position: relative;
  padding: var(--section-padding-y, clamp(52px, 5.2vw, 80px)) 0;
  background-color: var(--color-bg-dark);
  color: var(--color-text-main);
  overflow: hidden;
}

/* Header */
.portfolio__header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-3xl) auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Pill Badge */
.portfolio__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.4rem 1.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-purple-border);
  background: var(--color-purple-pill-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #9A9A9A;
  margin-bottom: var(--space-xl);
}

.portfolio__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 6px var(--color-primary);
}

/* Title & Description */
.portfolio__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #F5F5F5;
  margin-bottom: var(--space-md);
}

.portfolio__title-highlight {
  font-style: italic;
  font-weight: 400;
  color: #F5F5F5;
  background: linear-gradient(180deg, #F5F5F5 0%, #BCC5D8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  padding-right: 4px;
}

.portfolio__description {
  font-size: var(--font-size-md);
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 650px;
  margin: 0 auto;
}

/* Masonry Layout Container (3-Column Desktop Grid) */
.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
  width: 100%;
}

.portfolio__column {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Card Component (3D Perspective Base Container) */
.portfolio__card {
  position: relative;
  width: 100%;
  border-radius: 22px;
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
  perspective: 1000px; /* Enables 3D reveal depth */
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1),
              border-color 350ms ease,
              box-shadow 350ms ease;
  cursor: pointer;
}

/* Variable Card Aspect Ratios for Editorial Masonry Rhythm */
.portfolio__card--tall {
  min-height: 480px;
}

.portfolio__card--medium {
  min-height: 380px;
}

.portfolio__card--short {
  min-height: 320px;
}

/* Card Media / Image Wrapper */
.portfolio__card-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  transform-origin: center bottom;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1),
              filter 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio__card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Front Side Dark Gradient Overlay */
.portfolio__card-overlay-front {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.1) 0%, rgba(5, 5, 8, 0.4) 40%, rgba(5, 5, 8, 0.94) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  pointer-events: none;
  transition: opacity 500ms ease;
}

.portfolio__card-badge {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #FFFFFF;
  background: rgba(10, 10, 14, 0.75);
  border: 1px solid var(--color-purple-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.portfolio__card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.25;
  margin-top: auto;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
}

/* Back Side Reveal Panel (Desktop Book/Page Reveal Effect) */
.portfolio__card-panel-back {
  position: absolute;
  inset: 0;
  z-index: 3;
  background: rgba(12, 10, 20, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 22px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 16px;
  opacity: 0;
  transform: translateY(100%); /* Slides up from bottom */
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1),
              opacity 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio__card-panel-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.3;
}

.portfolio__card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  font-weight: 400;
}

.portfolio__card-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.65rem 1.4rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #FFFFFF;
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  text-decoration: none;
  box-shadow: 0 4px 16px var(--color-primary-glow);
  transition: background-color 250ms ease, box-shadow 250ms ease, transform 250ms ease;
}

.portfolio__card-btn-arrow {
  display: inline-block;
  transition: transform 250ms ease;
}

.portfolio__card-btn:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 6px 22px var(--color-primary-glow);
}

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

/* DESKTOP HOVER MICRO-INTERACTIONS & 3D REVEAL */
@media (min-width: 993px) {
  .portfolio__card:hover {
    transform: translateY(-8px);
    border-color: var(--color-purple-border);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5),
                0 0 24px var(--color-primary-glow);
  }

  /* 3D tilt image slightly on hover */
  .portfolio__card:hover .portfolio__card-media {
    transform: rotateX(12deg) scale(1.05);
    filter: brightness(0.7);
  }

  .portfolio__card:hover .portfolio__card-img {
    transform: scale(1.08);
  }

  /* Fade out front title & slide up back information panel */
  .portfolio__card:hover .portfolio__card-overlay-front {
    opacity: 0.15;
  }

  .portfolio__card:hover .portfolio__card-panel-back {
    opacity: 1;
    transform: translateY(0);
  }
}

/* MOBILE & TABLET DIRECT ACTION OVERLAY (NO FLIP) */
.portfolio__mobile-btn {
  display: none; /* Hidden desktop */
}

@media (max-width: 992px) {
  /* Tablet 2-Column Grid */
  .portfolio__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .portfolio__column:nth-child(3) {
    display: none; /* Distribute to 2 cols */
  }

  .portfolio__card--tall,
  .portfolio__card--medium,
  .portfolio__card--short {
    min-height: 360px;
  }

  /* Direct Touch Interaction for Mobile & Tablet */
  .portfolio__card-panel-back {
    display: none !important; /* Disable hidden back panel on touch */
  }

  .portfolio__card-overlay-front {
    opacity: 1 !important;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.05) 0%, rgba(5, 5, 8, 0.5) 30%, rgba(5, 5, 8, 0.95) 100%);
    padding: 22px;
  }

  .portfolio__mobile-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 0.55rem 1.2rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: #FFFFFF;
    background: var(--color-primary);
    border-radius: var(--radius-pill);
    text-decoration: none;
    box-shadow: 0 4px 14px var(--color-primary-glow);
    align-self: flex-start;
  }

  .portfolio {
    padding: var(--space-3-5xl) 0;
  }
}

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

@media (max-width: 640px) {
  /* Mobile Single-Column Stacking */
  .portfolio__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .portfolio__column {
    gap: 20px;
  }

  .portfolio__card--tall,
  .portfolio__card--medium,
  .portfolio__card--short {
    min-height: 320px;
  }
}