/* =============================================
   샤오통 XiaoTong — portfolio.css
   진행사례 페이지 (전체 레퍼런스 갤러리)
   ============================================= */

   :root {
    --red:        #E8192C;
    --red-dark:   #B8101F;
    --black:      #0a0a0a;
    --dark:       #111118;
    --dark2:      #18181f;
    --dark4:      #252530;
    --white:      #FFFFFF;
    --text:       rgba(255,255,255,0.88);
    --text-muted: rgba(255,255,255,0.50);
    --text-dim:   rgba(255,255,255,0.28);
    --border:     rgba(255,255,255,0.08);
  }
  
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--black);
    color: var(--text);
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 48px;
  }
  
  /* ── HERO ── */
  .pf-hero {
    padding: 160px 0 56px;
    background: var(--dark);
    border-bottom: 1px solid var(--border);
  }
  .pf-eyebrow {
    font-size: 10px; letter-spacing: 3px; text-transform: uppercase;
    color: var(--red); margin-bottom: 16px;
    display: flex; align-items: center; gap: 10px;
  }
  .pf-eyebrow::after { content: ''; flex: 0 0 32px; height: 1px; background: var(--red); }
  .pf-hero h1 {
    font-size: clamp(28px, 4vw, 44px); font-weight: 900;
    line-height: 1.3; color: var(--white); margin-bottom: 14px;
  }
  .pf-hero p {
    font-size: 15px; line-height: 1.8; color: var(--text-muted); max-width: 560px;
  }
  
  /* ── GRID SECTION ── */
  .pf-section { background: var(--dark); padding: 56px 0 100px; }
  
  .pf-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3px;
  }
  .pf-item {
    position: relative; overflow: hidden;
    aspect-ratio: 3/4;
    background: var(--dark4);
  }
  .pf-item a { display: block; width: 100%; height: 100%; }
  .pf-item img {
    width: 100%; height: 100%; object-fit: cover; display: block;
    transition: transform 0.4s;
  }
  .pf-item:hover img { transform: scale(1.05); }
  .pf-overlay {
    position: absolute; inset: 0;
    background: rgba(0,0,0,0);
    display: flex; align-items: center; justify-content: center;
    transition: background 0.25s;
  }
  .pf-item:hover .pf-overlay { background: rgba(0,0,0,0.6); }
  .pf-label {
    font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--white);
    opacity: 0; transform: translateY(6px);
    transition: opacity 0.25s, transform 0.25s;
  }
  .pf-item:hover .pf-label { opacity: 1; transform: translateY(0); }
  
  /* ── PAGINATION ── */
  .pf-pagination {
    display: flex; align-items: center; justify-content: center;
    gap: 6px; margin-top: 40px; flex-wrap: wrap;
  }
  .pf-page-btn,
  .pf-page-num {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 38px; height: 38px; padding: 0 12px;
    font-size: 13px; font-weight: 700;
    color: var(--text-muted);
    background: var(--dark2);
    border: 1px solid var(--border);
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
  }
  .pf-page-btn:hover,
  .pf-page-num:hover {
    color: var(--white);
    border-color: rgba(255,255,255,0.25);
  }
  .pf-page-num.active {
    background: var(--red);
    border-color: var(--red);
    color: var(--white);
  }
  .pf-page-btn.disabled {
    opacity: 0.35;
    pointer-events: none;
  }
  .pf-page-numbers { display: flex; gap: 6px; flex-wrap: wrap; }
  .pf-page-indicator {
    display: none;
    font-size: 13px; font-weight: 700; color: var(--text-muted);
    min-width: 60px; text-align: center;
  }
  
  .pf-note {
    margin-top: 16px; font-size: 12px; color: var(--text-dim);
  }
  
  /* ── 반응형 ── */
  @media (max-width: 1024px) {
    .container { padding: 0 32px; }
  }
  @media (max-width: 768px) {
    .container      { padding: 0 24px; }
    .pf-hero        { padding: 120px 0 40px; }
    .pf-section     { padding: 40px 0 72px; }
    .pf-grid        { grid-template-columns: repeat(2, 1fr); }
    .pf-page-numbers  { display: none; }
    .pf-page-indicator { display: inline-flex; align-items: center; justify-content: center; }
  }