/* ============================================================
   PORTFOLIO CSS — Solferino Technology
   portfolio.html — Horizontal scroll showcase
   ============================================================ */

/* ============================================================
   PORTFOLIO HERO
   ============================================================ */
.portfolio-hero {
  padding-top: calc(var(--nav-h) + clamp(60px, 8vw, 100px));
  padding-bottom: clamp(40px, 5vw, 64px);
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  border-bottom: 1px solid var(--border);
}

.portfolio-hero-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.portfolio-hero-headline {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(2.5rem, 7vw, 8rem);
  letter-spacing: -0.04em;
  line-height: 0.9;
  overflow: hidden;
}

.portfolio-hero-headline .line-wrap span {
  display: block;
  will-change: transform, opacity;
}

.portfolio-hero-headline em {
  color: var(--accent);
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

.portfolio-hero-side {
  max-width: 300px;
  align-self: flex-end;
  opacity: 0;
}

.portfolio-count {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(3rem, 6vw, 6rem);
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 8px;
}

.portfolio-count-label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Scroll hint */
.scroll-hint {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.scroll-hint-arrow {
  display: flex;
  align-items: center;
  gap: 8px;
}

.scroll-hint-arrow span {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.scroll-hint-line {
  width: 40px;
  height: 1px;
  background: var(--muted);
  position: relative;
  overflow: hidden;
}

.scroll-hint-line::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: var(--accent);
  animation: slideHint 2s ease-in-out infinite 1s;
}

@keyframes slideHint {
  0%   { left: -100%; }
  100% { left: 100%; }
}

/* ============================================================
   HORIZONTAL SCROLL SECTION
   GSAP pins .portfolio-horizontal itself — no sticky-wrapper needed.
   ============================================================ */
.portfolio-horizontal {
  overflow: hidden; /* contain the sliding track */
  height: 100vh;    /* visible viewport while pinned */
  display: flex;
  align-items: center;
}

/* The track that slides horizontally */
.portfolio-track {
  display: flex;
  align-items: center;
  gap: clamp(24px, 3vw, 40px);
  padding: 0 var(--gutter);
  will-change: transform;
  flex-shrink: 0;
}

/* ============================================================
   PROJECT CARDS
   ============================================================ */
.project-card {
  flex-shrink: 0;
  width: clamp(340px, 38vw, 560px);
  height: clamp(420px, 70vh, 640px);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border-radius: 2px;
}

/* Monochrome base state */
.project-card-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: grayscale(100%) contrast(0.9) brightness(1.05);
  transform: scale(1.02);
  transition: filter 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: filter, transform;
}

/* On hover: full color */
.project-card:hover .project-card-bg {
  filter: grayscale(0%) contrast(1) brightness(1);
  transform: scale(1);
}

/* Monochrome overlay (fades on hover) */
.project-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(26, 26, 26, 0.85) 0%,
    rgba(26, 26, 26, 0.2) 50%,
    transparent 100%
  );
  transition: opacity 0.5s ease;
}

.project-card:hover .project-card-overlay {
  background: linear-gradient(
    to top,
    rgba(26, 26, 26, 0.75) 0%,
    rgba(26, 26, 26, 0.1) 50%,
    transparent 100%
  );
}

/* Placeholder bg (for cards without real images) */
.project-card--placeholder-1 .project-card-bg { background: #cbc9c5; }
.project-card--placeholder-2 .project-card-bg { background: #b8b5b0; }
.project-card--placeholder-3 .project-card-bg { background: #d4d1cc; }
.project-card--placeholder-4 .project-card-bg { background: #c2bfba; }
.project-card--placeholder-5 .project-card-bg { background: #bfbcb7; }

/* Abstract texture pattern for placeholders */
.project-card-bg-texture {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 40px,
      rgba(26, 26, 26, 0.04) 40px,
      rgba(26, 26, 26, 0.04) 41px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 40px,
      rgba(26, 26, 26, 0.04) 40px,
      rgba(26, 26, 26, 0.04) 41px
    );
}

/* Accent border that reveals on hover */
.project-card-accent-border {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 3;
}

.project-card:hover .project-card-accent-border { transform: scaleX(1); }

/* Card content */
.project-card-content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: clamp(24px, 3vw, 36px);
  z-index: 2;
  transform: translateY(12px);
  transition: transform 0.5s ease;
}

.project-card:hover .project-card-content { transform: translateY(0); }

.project-category {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(249, 248, 246, 0.6);
  margin-bottom: 8px;
}

.project-name {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.5vw, 2rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--bg);
  margin-bottom: 12px;
}

/* Detail overlay — slides in on hover */
.project-details {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.5s ease, opacity 0.4s ease;
  opacity: 0;
}

.project-card:hover .project-details {
  max-height: 200px;
  opacity: 1;
}

.project-desc {
  font-size: 0.85rem;
  line-height: 1.65;
  color: rgba(249, 248, 246, 0.75);
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-tag {
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(249, 248, 246, 0.5);
  border: 1px solid rgba(249, 248, 246, 0.2);
  padding: 4px 10px;
  border-radius: 2px;
}

/* Case study link button on card */
.project-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bg);
  background: rgba(0,74,173,0.8);
  padding: 8px 16px;
  border-radius: 2px;
  transition: background 0.25s ease;
}

.project-card-link:hover { background: var(--accent); }

/* Card index number — top right */
.project-index {
  position: absolute;
  top: clamp(16px, 2vw, 24px);
  right: clamp(16px, 2vw, 24px);
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  letter-spacing: -0.06em;
  color: rgba(249, 248, 246, 0.15);
  line-height: 1;
  z-index: 2;
  transition: color 0.5s ease;
}

.project-card:hover .project-index { color: rgba(249, 248, 246, 0.25); }

/* CTA card — last card in track */
.project-card--cta {
  background: var(--accent);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: clamp(24px, 3vw, 36px);
  cursor: default;
}

.cta-card-label {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(249, 248, 246, 0.55);
  margin-bottom: 12px;
}

.cta-card-headline {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--bg);
  margin-bottom: 24px;
}

/* ============================================================
   PROGRESS BAR (horizontal scroll indicator)
   ============================================================ */
.portfolio-progress {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--border);
  z-index: 50;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.portfolio-progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: none;
}

.portfolio-progress.is-active { opacity: 1; }

/* ============================================================
   CASE STUDIES GRID (below horizontal scroll)
   ============================================================ */
.case-studies-section {
  padding: var(--section-pad) var(--gutter);
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.case-studies-inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.case-studies-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: clamp(40px, 6vw, 80px);
  gap: 32px;
  flex-wrap: wrap;
}

/* ============================================================
   RESPONSIVE (mobile: vertical stack instead of horizontal)
   ============================================================ */
@media (max-width: 768px) {
  .portfolio-horizontal,
  .portfolio-progress { display: none; }

  /* Scroll orizzontale con snap — stesso effetto "scorrimento" del desktop */
  .portfolio-mobile-grid {
    display: flex !important;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: 12px;
    padding: 0 var(--gutter) clamp(24px, 4vw, 40px);
    scrollbar-width: none;
    background: transparent;
    /* Fade-out ai bordi per suggerire lo scroll */
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 5%, black 92%, transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, black 5%, black 92%, transparent 100%);
  }

  .portfolio-mobile-grid::-webkit-scrollbar { display: none; }

  .portfolio-mobile-grid .project-card {
    flex-shrink: 0;
    width: min(78vw, 340px);
    height: clamp(400px, 75vw, 520px);
    scroll-snap-align: center;
    border-radius: 4px;
  }

  /* Su mobile i dettagli sono sempre visibili senza hover */
  .portfolio-mobile-grid .project-details {
    max-height: 200px;
    opacity: 1;
  }

  .portfolio-mobile-grid + .portfolio-swipe-hint { display: none; }

  .scroll-hint { display: none; }
}

.portfolio-mobile-grid { display: none; }
.portfolio-swipe-hint  { display: none; }

/* ============================================================
   FULLSCREEN CTA OVERLAY
   Appare a fine scroll orizzontale, wipe da destra verso sinistra
   ============================================================ */
.portfolio-cta-fs {
  position: fixed;
  inset: 0;
  background: var(--accent);
  z-index: 400;
  display: flex;
  align-items: flex-end;
  padding: clamp(48px, 7vw, 100px);
  clip-path: inset(50% 50% 50% 50% round 50%);
  pointer-events: none;
  will-change: clip-path, opacity;
  overflow: hidden;
}

.portfolio-cta-fs-inner {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 36px);
  opacity: 0;
}

.portfolio-cta-fs-label {
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(249, 248, 246, 0.5);
}

.portfolio-cta-fs-headline {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(3.5rem, 9vw, 10rem);
  letter-spacing: -0.04em;
  line-height: 0.92;
  color: var(--bg);
}

.portfolio-cta-fs-headline em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: rgba(249, 248, 246, 0.65);
}

.portfolio-cta-fs-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(0.85rem, 1.2vw, 1rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--bg);
  padding: 16px 32px;
  border-radius: 2px;
  align-self: flex-start;
  transition: opacity 0.2s ease;
}

.portfolio-cta-fs-btn:hover { opacity: 0.85; }

@media (max-width: 768px) {
  .portfolio-cta-fs { display: none !important; visibility: hidden !important; }
}