:root {
  --primary:      #dc2626;
  --primary-dark: #b91c1c;
  --gray:         #6e6e6e;
  --gray-dark:    #4a4a4a;
}
/* =============================================
   Dept Website CSS — เหมือนเว็บหลัก FIT
   สีเปลี่ยนตาม --primary ของแต่ละสาขา
   ============================================= */
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:'Noto Sans Thai','Sarabun',sans-serif; background:#f4f4f4; color:#333; font-size:15px; }

/* TOPBAR */
.topbar { background:#6e6e6e; color:#ddd; font-size:0.78rem; padding:0.35rem 1.5rem; display:flex; align-items:center; justify-content:space-between; gap:1rem; }
.topbar a { color:#ddd; text-decoration:none; }
.topbar a:hover { color:var(--primary); }
.topbar-left { display:flex; gap:1.5rem; align-items:center; }
.topbar-right { display:flex; gap:1rem; align-items:center; }
.topbar-social { display:flex; gap:0.4rem; }
.topbar-social a { display:inline-flex; align-items:center; justify-content:center; width:22px; height:22px; border-radius:4px; background:rgba(255,255,255,0.1); color:#ddd; text-decoration:none; font-size:0.75rem; font-weight:700; transition:background 0.2s; }
.topbar-social a:hover { background:var(--primary); color:#fff; }

/* HEADER */
header { background:#fff; box-shadow:0 2px 8px rgba(0,0,0,0.08); position:sticky; top:0; z-index:999; }
.header-inner { max-width:1200px; margin:0 auto; padding:0 1.5rem; display:flex; align-items:center; justify-content:space-between; height:72px; }
.logo-area { display:flex; align-items:center; gap:12px; text-decoration:none; flex-shrink:0; }
.logo-badge { width:52px; height:52px; background:linear-gradient(135deg,var(--primary),var(--primary-dark)); border-radius:10px; display:flex; align-items:center; justify-content:center; font-weight:900; font-size:1rem; color:#fff; flex-shrink:0; }
.logo-text .line1 { font-size:0.88rem; font-weight:800; color:#333; line-height:1.3; }
.logo-text .line2 { font-size:0.65rem; color:#999; }
.logo-text .line3 { font-size:0.62rem; color:var(--primary); font-weight:700; margin-top:1px; }

/* NAV */
nav.main-nav { display:flex; align-items:center; }
nav.main-nav > ul { list-style:none; display:flex; }
nav.main-nav > ul > li { position:relative; }
nav.main-nav > ul > li > a { display:flex; align-items:center; gap:4px; padding:0 0.9rem; height:72px; color:#444; text-decoration:none; font-size:0.82rem; font-weight:600; transition:color 0.2s; border-bottom:3px solid transparent; white-space:nowrap; }
nav.main-nav > ul > li > a:hover, nav.main-nav > ul > li:hover > a { color:var(--primary); border-bottom-color:var(--primary); background:rgba(0,0,0,0.02); }
.caret { font-size:0.55rem; opacity:0.4; }
.dropdown { display:none; position:absolute; top:100%; left:0; background:#fff; min-width:240px; box-shadow:0 8px 30px rgba(0,0,0,0.12); border-top:3px solid var(--primary); border-radius:0 0 8px 8px; padding:1rem; z-index:1000; }
nav.main-nav > ul > li:hover .dropdown { display:block; }
.dropdown a { font-size:0.8rem; color:#555; text-decoration:none; padding:0.3rem 0; display:block; transition:all 0.15s; }
.dropdown a:hover { color:var(--primary); padding-left:5px; }
.nav-back { margin-left:0.8rem; background:var(--primary); color:#fff !important; border-radius:7px; padding:0.5rem 1.2rem; font-size:0.8rem; font-weight:700; text-decoration:none; white-space:nowrap; transition:background 0.2s; border-bottom:none !important; }
.nav-back:hover { background:var(--primary-dark) !important; }
.hamburger { display:none; background:none; border:none; cursor:pointer; padding:0.4rem; }
.hamburger span { display:block; width:22px; height:2px; background:#555; margin:5px 0; border-radius:2px; transition:0.3s; }

/* HERO SLIDER */
.hero-slider { position:relative; background:#777; height:440px; overflow:hidden; }
.slide { position:absolute; inset:0; display:flex; align-items:center; opacity:0; transition:opacity 0.8s; }
.slide.active { opacity:1; }
.slide-bg { position:absolute; inset:0; width:100%; height:100%; background-size:cover; background-position:center; }
.slide-overlay { position:absolute; inset:0; background:rgba(0,0,0,0.42); }
.slide-content { position:relative; z-index:2; max-width:1200px; margin:0 auto; padding:0 2rem; width:100%; }
.slide-tag { display:inline-block; background:var(--primary); color:#fff; font-size:0.7rem; font-weight:700; padding:0.25rem 0.8rem; border-radius:4px; text-transform:uppercase; letter-spacing:0.06em; margin-bottom:0.75rem; }
.slide-title { font-size:clamp(1.4rem,3vw,2.3rem); font-weight:800; color:#fff; line-height:1.35; max-width:580px; margin-bottom:1.2rem; }
.slide-btn { display:inline-flex; align-items:center; gap:6px; background:var(--primary); color:#fff; font-weight:700; font-size:0.85rem; padding:0.65rem 1.8rem; border-radius:6px; text-decoration:none; transition:background 0.2s; }
.slide-btn:hover { background:var(--primary-dark); }
.slider-nav { position:absolute; bottom:1.2rem; left:50%; transform:translateX(-50%); display:flex; gap:0.6rem; z-index:10; }
.dot { width:9px; height:9px; border-radius:50%; background:rgba(255,255,255,0.35); cursor:pointer; transition:all 0.3s; border:none; padding:0; }
.dot.active { background:var(--primary); transform:scale(1.3); }
.slider-counter { position:absolute; bottom:1rem; right:2rem; z-index:10; color:rgba(255,255,255,0.5); font-size:0.75rem; }

/* DEPT BANNER (แทน slider ถ้าไม่มีแบนเนอร์) */
.dept-hero { background:linear-gradient(135deg,var(--primary),var(--primary-dark)); padding:3.5rem 2rem; color:#fff; }
.dept-hero-inner { max-width:1200px; margin:0 auto; display:flex; align-items:center; gap:1.5rem; }
.dept-hero-icon { font-size:3.5rem; flex-shrink:0; }
.dept-hero h1 { font-size:clamp(1.3rem,3vw,2rem); font-weight:800; line-height:1.3; margin-bottom:0.3rem; }
.dept-hero p { font-size:0.85rem; opacity:0.85; }

/* MAIN */
.main-wrap { max-width:1200px; margin:2rem auto; padding:0 1.5rem; display:grid; grid-template-columns:1fr 310px; gap:2rem; }
.block-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:1rem; padding-bottom:0.5rem; border-bottom:2px solid var(--primary); }
.block-title { font-size:0.95rem; font-weight:800; color:#333; display:flex; align-items:center; gap:8px; }
.block-title::before { content:''; display:block; width:4px; height:18px; background:var(--primary); border-radius:2px; }
.see-all { font-size:0.78rem; color:var(--primary); text-decoration:none; font-weight:600; }
.see-all:hover { text-decoration:underline; }

/* NEWS GRID */
.news-grid { display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.news-card { background:#fff; border-radius:8px; overflow:hidden; text-decoration:none; color:inherit; border:1px solid #e8e8e8; transition:box-shadow 0.25s,transform 0.25s; display:flex; flex-direction:column; }
.news-card:hover { box-shadow:0 6px 20px rgba(0,0,0,0.1); transform:translateY(-2px); }
.nc-img { height:155px; overflow:hidden; position:relative; background:#e0e0e0; flex-shrink:0; }
.nc-img img { width:100%; height:100%; object-fit:cover; }
.nc-img-bg { width:100%; height:100%; display:flex; align-items:center; justify-content:center; font-size:2.5rem; color:rgba(255,255,255,0.5); background:linear-gradient(135deg,var(--primary),var(--primary-dark)); }
.nc-tag { position:absolute; top:8px; left:8px; background:var(--primary); color:#fff; font-size:0.6rem; font-weight:700; padding:0.18rem 0.55rem; border-radius:3px; text-transform:uppercase; }
.nc-body { padding:0.85rem; flex:1; display:flex; flex-direction:column; }
.nc-date { font-size:0.65rem; color:#aaa; margin-bottom:0.35rem; }
.nc-title { font-size:0.82rem; font-weight:700; color:#333; line-height:1.5; flex:1; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }
.nc-footer { margin-top:0.55rem; padding-top:0.5rem; border-top:1px solid #f0f0f0; }
.nc-read { font-size:0.7rem; color:var(--primary); font-weight:600; }
.news-card.wide { grid-column:span 2; flex-direction:row; }
.news-card.wide .nc-img { width:260px; height:auto; flex-shrink:0; border-radius:0; }
.news-card.wide .nc-title { font-size:0.95rem; -webkit-line-clamp:4; }

/* SIDEBAR */
.sidebar { display:flex; flex-direction:column; gap:1.5rem; }
.quick-access { background:#fff; border-radius:8px; overflow:hidden; border:1px solid #e8e8e8; }
.qa-head { background:linear-gradient(135deg,var(--primary),var(--primary-dark)); padding:0.75rem 1rem; font-size:0.83rem; font-weight:800; color:#fff; }
.qa-list { list-style:none; }
.qa-list li { border-bottom:1px solid #f5f5f5; }
.qa-list li a { display:flex; align-items:center; gap:8px; padding:0.6rem 1rem; font-size:0.78rem; color:#444; text-decoration:none; transition:background 0.15s; }
.qa-list li a:hover { background:#f8f8f8; color:var(--primary); }
.qa-ico { font-size:0.95rem; flex-shrink:0; }
.qa-arr { margin-left:auto; color:#ccc; font-size:0.65rem; }
.ann-block { background:#fff; border-radius:8px; border:1px solid #e8e8e8; overflow:hidden; }
.ann-head { background:#6e6e6e; padding:0.75rem 1rem; font-size:0.83rem; font-weight:800; color:#fff; }
.ann-list { list-style:none; }
.ann-list li { border-bottom:1px solid #f5f5f5; }
.ann-list li a { display:flex; align-items:flex-start; gap:8px; padding:0.6rem 1rem; text-decoration:none; color:#444; font-size:0.75rem; line-height:1.4; transition:background 0.15s; }
.ann-list li a:hover { background:#f8f8f8; color:var(--primary); }
.ann-date { font-size:0.62rem; color:#fff; background:#bbb; border-radius:3px; padding:0.1rem 0.4rem; flex-shrink:0; margin-top:2px; white-space:nowrap; }

/* TEACHERS SECTION */
.teacher-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(200px,1fr)); gap:1rem; }
.teacher-card { background:#fff; border-radius:10px; overflow:hidden; box-shadow:0 2px 8px rgba(0,0,0,0.06); transition:transform 0.2s,box-shadow 0.2s; text-align:center; border:1px solid #e8e8e8; }
.teacher-card:hover { transform:translateY(-3px); box-shadow:0 8px 24px rgba(0,0,0,0.1); }
.teacher-card.head { border-color:var(--primary); border-width:2px; }
.teacher-photo-wrap { padding:1.2rem 1.2rem 0.6rem; }
.teacher-photo { width:88px; height:88px; border-radius:50%; object-fit:cover; border:3px solid #f0f0f0; margin:0 auto; display:block; }
.teacher-photo-placeholder { width:88px; height:88px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--primary-dark)); display:flex; align-items:center; justify-content:center; color:#fff; font-size:1.6rem; font-weight:800; margin:0 auto; }
.teacher-body { padding:0 0.85rem 1rem; }
.teacher-head-badge { display:inline-block; background:var(--primary); color:#fff; font-size:0.6rem; font-weight:700; padding:0.15rem 0.6rem; border-radius:10px; margin-bottom:0.3rem; }
.teacher-name { font-size:0.82rem; font-weight:800; color:#222; line-height:1.4; margin-bottom:0.2rem; }
.teacher-position { font-size:0.7rem; color:#888; margin-bottom:0.4rem; line-height:1.5; }
.teacher-edu { font-size:0.68rem; color:#aaa; line-height:1.7; text-align:left; background:#f8f8f8; border-radius:5px; padding:0.4rem 0.65rem; margin-bottom:0.4rem; }
.teacher-expertise { font-size:0.68rem; color:var(--primary); font-weight:600; }

/* DEPTS SECTION */
.depts-section { background:#fff; padding:2.5rem 1.5rem; border-top:1px solid #e8e8e8; }
.depts-inner { max-width:1200px; margin:0 auto; }
.depts-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; margin-top:1.5rem; }
.dept-card { border:1px solid #e8e8e8; border-radius:8px; padding:1.2rem 0.8rem; text-align:center; text-decoration:none; color:inherit; transition:all 0.25s; background:#fafafa; }
.dept-card:hover { border-color:var(--primary); background:#fff; box-shadow:0 4px 16px rgba(0,0,0,0.08); transform:translateY(-2px); }
.dept-emoji { font-size:1.8rem; margin-bottom:0.5rem; display:block; }
.dept-name { font-size:0.78rem; font-weight:700; color:#333; line-height:1.4; margin-bottom:0.2rem; }
.dept-code { font-size:0.62rem; color:var(--primary); font-weight:700; text-transform:uppercase; }

/* STATS */
.stats-bar { background:linear-gradient(135deg,var(--primary),var(--primary-dark)); padding:2rem 1.5rem; }
.stats-inner { max-width:1200px; margin:0 auto; display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; }
.stat-item { text-align:center; }
.stat-num { font-size:2rem; font-weight:900; color:#fff; line-height:1; }
.stat-label { font-size:0.78rem; color:rgba(255,255,255,0.85); margin-top:0.3rem; }

/* BREADCRUMB */
.breadcrumb { background:#fff; border-bottom:1px solid #f0f0f0; padding:0.65rem 0; }
.breadcrumb-inner { max-width:1200px; margin:0 auto; padding:0 1.5rem; font-size:0.72rem; color:#aaa; }
.breadcrumb-inner a { color:#aaa; text-decoration:none; }
.breadcrumb-inner a:hover { color:var(--primary); }

/* ARTICLE */
.article-wrap { max-width:820px; margin:0 auto; }
.article-title { font-size:clamp(1.2rem,3vw,1.8rem); font-weight:800; color:#222; line-height:1.45; margin-bottom:1rem; }
.article-meta { display:flex; gap:1.2rem; flex-wrap:wrap; font-size:0.75rem; color:#aaa; padding-bottom:1rem; border-bottom:1px solid #f0f0f0; margin-bottom:1.5rem; }
.article-thumb { width:100%; max-height:420px; object-fit:cover; border-radius:10px; margin-bottom:1.5rem; }
.article-content { font-size:0.9rem; line-height:1.9; color:#333; }
.article-content p { margin-bottom:1rem; }
.article-content img { max-width:100%; border-radius:8px; }

/* FOOTER */
footer { background:#6e6e6e; color:rgba(255,255,255,0.65); padding:2.5rem 1.5rem 0; }
.footer-inner { max-width:1200px; margin:0 auto; display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:2.5rem; padding-bottom:2rem; border-bottom:1px solid rgba(255,255,255,0.07); }
.fb-logo { display:flex; align-items:center; gap:10px; margin-bottom:1rem; }
.fb-badge { width:42px; height:42px; background:var(--primary); border-radius:8px; display:flex; align-items:center; justify-content:center; font-weight:900; color:#fff; font-size:0.82rem; flex-shrink:0; }
.fb-name { font-size:0.85rem; font-weight:700; color:#fff; line-height:1.4; }
.footer-brand p { font-size:0.73rem; line-height:1.9; margin-bottom:0.3rem; }
.footer-contact { display:flex; flex-direction:column; gap:0.3rem; margin-top:0.5rem; }
.footer-contact span { font-size:0.72rem; color:rgba(255,255,255,0.45); }
.footer-col h4 { font-size:0.72rem; font-weight:800; color:var(--primary); text-transform:uppercase; letter-spacing:0.08em; margin-bottom:0.9rem; }
.footer-col ul { list-style:none; }
.footer-col li { margin-bottom:0.4rem; }
.footer-col a { font-size:0.73rem; color:rgba(255,255,255,0.45); text-decoration:none; transition:color 0.2s; }
.footer-col a:hover { color:var(--primary); }
.footer-bottom { max-width:1200px; margin:0 auto; padding:1.2rem 0; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:0.5rem; }
.footer-bottom p { font-size:0.68rem; color:rgba(255,255,255,0.25); }

/* RESPONSIVE */
@media(max-width:960px) {
  .main-wrap { grid-template-columns:1fr; }
  .news-grid { grid-template-columns:1fr; }
  .news-card.wide { flex-direction:column; }
  .news-card.wide .nc-img { width:100%; height:200px; }
  .depts-grid { grid-template-columns:repeat(2,1fr); }
  .stats-inner { grid-template-columns:repeat(2,1fr); }
  .footer-inner { grid-template-columns:1fr 1fr; }
  nav.main-nav { display:none; }
  nav.main-nav.open { display:flex; position:fixed; top:72px; left:0; right:0; bottom:0; background:rgba(0,0,0,0.5); z-index:998; flex-direction:column; }
  nav.main-nav.open > ul { background:#fff; flex-direction:column; padding:1rem 0; gap:0; width:280px; height:100%; overflow-y:auto; }
  nav.main-nav.open > ul > li > a { height:auto; padding:0.9rem 1.5rem; border-bottom:1px solid #f0f0f0; border-left:none; }
  .dropdown { display:none !important; }
  .hamburger { display:block; }
  .teacher-grid { grid-template-columns:repeat(2,1fr); }
}
@media(max-width:580px) {
  .depts-grid { grid-template-columns:repeat(2,1fr); }
  .footer-inner { grid-template-columns:1fr; gap:1.5rem; }
  .topbar { flex-direction:column; align-items:flex-start; padding:0.4rem 1rem; }
  .hero-slider { height:300px; }
  .dept-hero { padding:2rem 1.5rem; }
  .teacher-grid { grid-template-columns:repeat(2,1fr); }
}