@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

/* ── Reset & Variables ── */
.btk-portfolio {
  width: 100%; overflow-x: hidden;
  --dark-bg: #0a0a0a; --dark-card: #1a1a1a; --dark-lighter: #2a2a2a;
  --orange: #f97316; --orange-dark: #ea580c; --orange-glow: rgba(249,115,22,0.15);
  --text-primary: #ffffff; --text-secondary: #d4d4d4; --text-muted: #a3a3a3;
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--dark-bg); color: var(--text-primary);
  line-height: 1.6; font-size: 16px !important; margin: 0; padding: 0;
}
.btk-portfolio * { margin: 0; padding: 0; box-sizing: border-box; }

/* ── Back Link ── */
.btk-portfolio .back-link {
  display: inline-flex; align-items: center; gap: .5rem;
  color: var(--text-secondary); text-decoration: none; font-size: .9rem;
  margin: 1rem 2rem; transition: color .3s;
}
.btk-portfolio .back-link::before { content: '\2190'; font-size: 1.2rem; }
.btk-portfolio .back-link:hover { color: var(--orange); }

/* ── Hero ── */
.btk-portfolio .hero {
  padding: 20px 2rem 60px; text-align: center;
  background: radial-gradient(ellipse at top, rgba(249,115,22,0.08) 0%, transparent 50%), var(--dark-bg);
  position: relative; overflow: hidden;
}
.btk-portfolio .hero-content { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }
.btk-portfolio .category-badge {
  display: inline-block; padding: .4rem 1.2rem; border-radius: 50px;
  background: rgba(249,115,22,0.1); border: 1px solid rgba(249,115,22,0.3);
  color: var(--orange); font-size: .8rem; font-weight: 700; letter-spacing: 2px;
  margin-bottom: 1.5rem;
}
.btk-portfolio .hero h1 {
  font-size: clamp(2.5rem,5vw,4rem); font-weight: 900; margin-bottom: 1rem; line-height: 1.1;
  background: linear-gradient(135deg,#fff 0%,#d4d4d4 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.btk-portfolio .hero p {
  font-size: clamp(1.1rem,2vw,1.4rem); color: var(--text-secondary);
  max-width: 700px; margin: 0 auto 2rem;
}
.btk-portfolio .hero-stats { display: flex; justify-content: center; gap: 3rem; flex-wrap: wrap; }
.btk-portfolio .hero-stat { text-align: center; }
.btk-portfolio .hero-stat .num {
  display: block; font-size: clamp(2rem,3.5vw,2.8rem); font-weight: 900;
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.btk-portfolio .hero-stat .label { font-size: .9rem; color: var(--text-muted); }

/* ── Portfolio Nav (sub-page tabs) ── */
.btk-portfolio .portfolio-nav {
  display: flex; justify-content: center; gap: .5rem; padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.05); flex-wrap: wrap;
}
.btk-portfolio .nav-item {
  padding: .6rem 1.5rem; border-radius: 8px; text-decoration: none;
  color: var(--text-secondary); font-weight: 600; font-size: .95rem;
  transition: all .3s; display: flex; align-items: center; gap: .5rem;
}
.btk-portfolio .nav-item:hover { color: var(--text-primary); background: var(--dark-card); }
.btk-portfolio .nav-item.active { color: var(--orange); background: rgba(249,115,22,0.1); }
.btk-portfolio .nav-item .count {
  background: var(--dark-lighter); padding: .15rem .5rem; border-radius: 4px; font-size: .8rem;
}
.btk-portfolio .nav-item.active .count { background: rgba(249,115,22,0.2); color: var(--orange); }

/* ── Filter Tabs ── */
.btk-portfolio .filter-section { padding: 3rem 2rem; max-width: 1400px; margin: 0 auto; }
.btk-portfolio .filter-tabs { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; margin-bottom: 2.5rem; }
.btk-portfolio .filter-tab {
  padding: .6rem 1.5rem; background: var(--dark-card); border: 2px solid transparent;
  border-radius: 50px; font-size: .95rem; font-weight: 600; color: var(--text-secondary);
  cursor: pointer; transition: all .3s;
}
.btk-portfolio .filter-tab:hover { border-color: var(--orange); transform: translateY(-2px); }
.btk-portfolio .filter-tab.active { border-color: var(--orange); color: var(--text-primary); box-shadow: 0 4px 20px var(--orange-glow); }

/* ── Portfolio Grid ── */
.btk-portfolio .portfolio-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.btk-portfolio .portfolio-card {
  background: var(--dark-card); border-radius: 16px; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.05); transition: all .4s; display: none;
}
.btk-portfolio .portfolio-card.visible { display: block; }
.btk-portfolio .portfolio-card:hover { transform: translateY(-8px); border-color: rgba(249,115,22,0.3); box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.btk-portfolio .placeholder-card { opacity: .6; border-style: dashed; }

.btk-portfolio .card-content { padding: 2rem; }
.btk-portfolio .industry-tag {
  display: inline-block; padding: .35rem .9rem; border-radius: 6px;
  font-size: .75rem; font-weight: 700; letter-spacing: .5px; margin-bottom: 1rem;
}
.btk-portfolio .tag-franchise { background: rgba(59,130,246,0.15); color: #60a5fa; }
.btk-portfolio .tag-cafeteria { background: rgba(34,197,94,0.15); color: #4ade80; }
.btk-portfolio .tag-hotel { background: rgba(168,85,247,0.15); color: #c084fc; }
.btk-portfolio .tag-public { background: rgba(249,115,22,0.15); color: var(--orange); }
.btk-portfolio .tag-individual { background: rgba(107,114,128,0.15); color: #9ca3af; }
.btk-portfolio .tag-emergency { background: rgba(239,68,68,0.15); color: #f87171; }
.btk-portfolio .tag-preventive { background: rgba(34,197,94,0.15); color: #4ade80; }
.btk-portfolio .tag-upgrade { background: rgba(59,130,246,0.15); color: #60a5fa; }

.btk-portfolio .card-content h3 { font-size: 1.4rem; font-weight: 800; margin-bottom: .5rem; }
.btk-portfolio .client-name { font-size: 1rem; color: var(--orange); font-weight: 600; margin-bottom: .75rem; }
.btk-portfolio .card-description { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 1.25rem; }
.btk-portfolio .card-metrics { display: flex; gap: 1.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(255,255,255,0.05); }
.btk-portfolio .metric { flex: 1; }
.btk-portfolio .metric-label { font-size: .8rem; color: var(--text-muted); letter-spacing: .5px; margin-bottom: .2rem; }
.btk-portfolio .metric-value { font-size: 1rem; font-weight: 700; }

/* ── CTA Section ── */
.btk-portfolio .cta-section { padding: 5rem 2rem; text-align: center; max-width: 900px; margin: 0 auto; }
.btk-portfolio .cta-section h2 { font-size: clamp(2rem,4vw,3rem); font-weight: 900; margin-bottom: 1rem; line-height: 1.2; }
.btk-portfolio .cta-desc { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 2rem; }
.btk-portfolio .cta-buttons { display: flex; gap: 1.5rem; justify-content: center; flex-wrap: wrap; }
.btk-portfolio .cta-primary {
  padding: 1.125rem 2.5rem; background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  color: #fff; text-decoration: none; border-radius: 12px; font-weight: 700; font-size: 1.1rem;
  transition: all .4s; box-shadow: 0 8px 30px var(--orange-glow);
}
.btk-portfolio .cta-primary:hover { transform: translateY(-4px); box-shadow: 0 12px 40px var(--orange-glow); }
.btk-portfolio .cta-secondary {
  padding: 1.125rem 2.5rem; background: transparent; color: var(--text-primary);
  text-decoration: none; border-radius: 12px; font-weight: 700; font-size: 1.1rem;
  border: 2px solid rgba(255,255,255,0.1); transition: all .4s;
}
.btk-portfolio .cta-secondary:hover { border-color: var(--orange); transform: translateY(-4px); }

/* ── ONE-CARE Section (A/S page) ── */
.btk-portfolio .onecare-section { padding: 5rem 2rem; text-align: center; max-width: 1100px; margin: 0 auto; }
.btk-portfolio .onecare-section h2 { font-size: clamp(2rem,4vw,2.8rem); font-weight: 900; margin-bottom: 3rem; }
.btk-portfolio .onecare-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.btk-portfolio .onecare-item {
  background: var(--dark-card); border-radius: 16px; padding: 2.5rem 2rem;
  border: 1px solid rgba(255,255,255,0.05); transition: all .3s;
}
.btk-portfolio .onecare-item:hover { border-color: rgba(249,115,22,0.3); transform: translateY(-4px); }
.btk-portfolio .onecare-icon {
  width: 48px; height: 48px; border-radius: 12px; margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 1.2rem;
}
.btk-portfolio .onecare-item h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: .75rem; }
.btk-portfolio .onecare-item p { color: var(--text-secondary); font-size: .95rem; }

/* ── Team Section ── */
.btk-portfolio .team-section { padding: 3rem 2rem; max-width: 1200px; margin: 0 auto; }
.btk-portfolio .team-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 2rem; }
.btk-portfolio .team-card {
  background: var(--dark-card); border-radius: 16px; padding: 2.5rem;
  border: 1px solid rgba(255,255,255,0.05); display: flex; gap: 2rem; align-items: flex-start;
  transition: all .3s;
}
.btk-portfolio .team-card:hover { border-color: rgba(249,115,22,0.3); transform: translateY(-4px); }
.btk-portfolio .team-avatar { flex-shrink: 0; }
.btk-portfolio .avatar-placeholder {
  width: 80px; height: 80px; border-radius: 50%;
  background: linear-gradient(135deg, var(--dark-lighter), var(--dark-card));
  border: 2px solid rgba(249,115,22,0.3);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .9rem; color: var(--orange);
}
.btk-portfolio .team-info h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: .25rem; }
.btk-portfolio .team-role { color: var(--orange); font-weight: 600; font-size: .95rem; margin-bottom: .25rem; }
.btk-portfolio .team-career { color: var(--text-muted); font-size: .85rem; margin-bottom: 1rem; }
.btk-portfolio .team-quote {
  color: var(--text-secondary); font-size: .95rem; font-style: italic;
  padding-left: 1rem; border-left: 3px solid var(--orange); margin-bottom: 1rem;
}
.btk-portfolio .team-tags { display: flex; gap: .5rem; flex-wrap: wrap; }
.btk-portfolio .team-tag {
  padding: .25rem .75rem; border-radius: 4px; font-size: .8rem; font-weight: 600;
  background: var(--dark-lighter); color: var(--text-secondary);
}

/* ── Philosophy Section (Team page) ── */
.btk-portfolio .philosophy-section {
  padding: 5rem 2rem; text-align: center; max-width: 1100px; margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.btk-portfolio .philosophy-section h2 { font-size: clamp(2rem,4vw,2.8rem); font-weight: 900; margin-bottom: 3rem; }
.btk-portfolio .philosophy-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.btk-portfolio .philosophy-item {
  background: var(--dark-card); border-radius: 16px; padding: 2.5rem 2rem;
  border: 1px solid rgba(255,255,255,0.05); text-align: left; transition: all .3s;
}
.btk-portfolio .philosophy-item:hover { border-color: rgba(249,115,22,0.3); }
.btk-portfolio .philosophy-number {
  font-size: 2rem; font-weight: 900; margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.btk-portfolio .philosophy-item h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: .75rem; }
.btk-portfolio .philosophy-item p { color: var(--text-secondary); font-size: .95rem; line-height: 1.7; }

/* ── Card with Thumbnail ── */
.btk-portfolio .portfolio-card .card-thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #111;
}
.btk-portfolio .portfolio-card .card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.btk-portfolio .portfolio-card:hover .card-thumb img {
  transform: scale(1.05);
}
.btk-portfolio .portfolio-card .card-content h3 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.btk-portfolio .portfolio-card .image-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.btk-portfolio .portfolio-card a.card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .btk-portfolio .portfolio-grid { grid-template-columns: repeat(2,1fr); }
  .btk-portfolio .onecare-grid, .btk-portfolio .philosophy-grid { grid-template-columns: repeat(2,1fr); }
  .btk-portfolio .team-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .btk-portfolio { font-size: 17px !important; }
  .btk-portfolio .hero { padding: 20px 1.5rem 40px; }
  .btk-portfolio .hero h1 { font-size: 2rem; }
  .btk-portfolio .hero-stats { gap: 1.5rem; }
  .btk-portfolio .hero-stat .num { font-size: 1.8rem; }
  .btk-portfolio .portfolio-nav { gap: .25rem; padding: 1rem; }
  .btk-portfolio .nav-item { padding: .5rem 1rem; font-size: .85rem; }
  .btk-portfolio .filter-section { padding: 2rem 1.5rem; }
  .btk-portfolio .filter-tab { padding: .5rem 1rem; font-size: .85rem; }
  .btk-portfolio .portfolio-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .btk-portfolio .onecare-grid, .btk-portfolio .philosophy-grid { grid-template-columns: 1fr; }
  .btk-portfolio .team-card { flex-direction: column; align-items: center; text-align: center; }
  .btk-portfolio .team-quote { border-left: none; padding-left: 0; border-top: 2px solid var(--orange); padding-top: .75rem; }
  .btk-portfolio .team-tags { justify-content: center; }
  .btk-portfolio .cta-buttons { flex-direction: column; }
  .btk-portfolio .cta-primary, .btk-portfolio .cta-secondary { width: 100%; text-align: center; }
}