/* ==========================================================================
   Custom layer – Minimal refinements for portfolio pages
   ========================================================================== */

:root {
  --accent: #FF4C4D;
  --bg-dark: #0a0a0a;
  --text-light: #f5f5f5;
  --text-muted: #888;
  --radius: 8px;
  --transition: 0.25s ease;
}

/* -------------------------------------------------------------------------
   Base
   ------------------------------------------------------------------------- */
html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-dark);
  color: var(--text-light);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* -------------------------------------------------------------------------
   Header
   ------------------------------------------------------------------------- */
.main-header {
  padding: 1.5rem 2rem;
}

.main-header .brand img {
  height: 36px;
  width: auto;
  opacity: 0.85;
  transition: opacity var(--transition);
}

.main-header .brand:hover img {
  opacity: 1;
}

/* -------------------------------------------------------------------------
   Back button
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.5rem;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(255, 76, 77, 0.35);
}

.btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(255, 76, 77, 0.5);
}

.btn i {
  color: #fff;
}

/* -------------------------------------------------------------------------
   Hero / Project header
   ------------------------------------------------------------------------- */
.hero {
  padding: 4rem 1rem 2rem;
  text-align: center;
}

.hero h4 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 1rem 0 0.5rem;
}

.hero a {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.hero a:hover {
  color: var(--text-light);
}

/* -------------------------------------------------------------------------
   Gallery grid
   ------------------------------------------------------------------------- */
.gallery .thumb {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}

.gallery .thumb img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.4s ease;
}

.gallery .thumb:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
}

.gallery .thumb:hover img {
  transform: scale(1.03);
}

.gallery .caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery .thumb:hover .caption {
  opacity: 1;
}

.caption .tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.caption .title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
}

/* -------------------------------------------------------------------------
   Filters
   ------------------------------------------------------------------------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.filters li {
  margin: 0;
}

.filters .filter {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  color: var(--text-muted);
  transition: all var(--transition);
}

.filters .filter:hover,
.filters .filter.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.filter-trigger {
  display: none;
}

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
.footer_center {
  padding: 3rem 1rem;
  text-align: center;
}

.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.footer p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer img {
  opacity: 0.6;
  transition: opacity var(--transition);
}

.footer img:hover {
  opacity: 1;
}

/* -------------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .hero h4 {
    font-size: 1.35rem;
  }

  .filters {
    justify-content: center;
  }

  .btn {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }
}

/* -------------------------------------------------------------------------
   Accessibility – focus visible
   ------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}