/* (ย่อ) ใช้สไตล์เดียวกับก่อนหน้า */
:root {
  --primary: #1976d2;
  --primary-dark: #0d47a1;
  --accent: #00bcd4;
  --bg: #f5f7fb;
  --text-main: #1f2933;
  --text-muted: #6b7280;
  --border: #e5e7eb;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text-main);line-height:1.5;}
a{text-decoration:none;color:inherit;}
.page{min-height:100vh;display:flex;flex-direction:column;}
.container{max-width:1120px;margin:0 auto;padding:0 1rem;}
header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;}
.nav{display:flex;align-items:center;justify-content:space-between;padding:0.75rem 0;}
.logo{display:flex;gap:0.5rem;align-items:center;font-weight:800;font-size:1.1rem;color:var(--primary-dark);}
nav ul{display:flex;gap:1.25rem;list-style:none;font-size:0.95rem;}
nav li a{padding-bottom:0.4rem;border-bottom:2px solid transparent;color:var(--text-main);}
nav li a:hover,nav li a.active{border-bottom-color:var(--primary);color:var(--primary-dark);}
.nav-right{display:flex;align-items:center;gap:0.75rem;}
.btn{border-radius:999px;padding:0.45rem 1.1rem;font-size:0.9rem;font-weight:600;border:1px solid transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;white-space:nowrap;}
.btn-outline{border-color:var(--primary);background:#fff;color:var(--primary-dark);}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);}
.btn-ghost{background:#fff;border:1px solid var(--border);color:var(--text-main);}

/* ปุ่มขนาดเล็ก ใช้กับปุ่ม "ดูรายละเอียด" ในการ์ดบทความ */
.btn-xs{padding:0.25rem 0.7rem;font-size:0.78rem;}

.nav-links{display:flex;}
.menu-toggle{display:none;background:transparent;border:none;cursor:pointer;padding:0.25rem;}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--text-main);margin:4px 0;border-radius:999px;}
.mobile-menu{display:none;background:#fff;border-bottom:1px solid var(--border);}
.mobile-menu-inner{padding:0.75rem 1rem 1rem;}
.mobile-menu a{display:block;padding:0.45rem 0;font-size:0.95rem;}
.section-label{font-size:0.8rem;color:var(--text-muted);margin-top:0.75rem;margin-bottom:0.25rem;text-transform:uppercase;letter-spacing:0.06em;}
.hero{background:#fff;padding:1.5rem 0;border-bottom:1px solid var(--border);}
.hero-grid{display:grid;grid-template-columns:3fr 2fr;gap:1.25rem;align-items:flex-start;}
.hero-banner{background:radial-gradient(circle at top left,#e3f2fd,#bbdefb);border-radius:1rem;padding:0.75rem;box-shadow:0 10px 30px rgba(15,23,42,0.08);}
.hero-banner-inner{background:#fff;border-radius:0.85rem;padding:1.1rem;}
.hero-tag{font-size:0.7rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--primary-dark);font-weight:700;}
.hero-title{font-size:1.35rem;font-weight:800;color:var(--primary-dark);margin-top:0.25rem;}
.hero-meta{font-size:0.85rem;color:var(--text-muted);margin-top:0.4rem;}
.hero-details{margin-top:0.5rem;font-size:0.85rem;}
.hero-actions{margin-top:0.8rem;display:flex;flex-wrap:wrap;gap:0.6rem;}
.hero-side-card{padding:0.9rem 1rem;border-radius:0.9rem;background:#e3f2fd;border:1px dashed #bbdefb;font-size:0.85rem;}
.section{padding:1.75rem 0 0.5rem;}
.section-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:1rem;}
.section-title{font-size:1.05rem;font-weight:700;}
.section-subtitle{font-size:0.8rem;color:var(--text-muted);}

/* ลิงก์ด้านขวาในหัวข้อ section เช่น "บทความทั้งหมด" */
.section-link{font-size:0.85rem;color:#1d4ed8;font-weight:500;}
.section-link:hover{text-decoration:underline;}

.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;}
.card-grid-3{grid-template-columns:1.5fr 1fr 1fr;}
.event-card{background:#fff;border-radius:0.75rem;border:1px solid var(--border);overflow:hidden;display:flex;flex-direction:column;}
.event-thumb{height:130px;background:#e5e7eb;display:flex;align-items:center;justify-content:center;font-size:0.75rem;color:var(--text-muted);}
.event-body{padding:0.7rem 0.8rem 0.8rem;display:flex;flex-direction:column;gap:0.25rem;}
.event-title{font-size:0.9rem;font-weight:700;}
.event-meta{font-size:0.78rem;color:var(--text-muted);}
.event-org{font-size:0.76rem;color:var(--text-muted);}
.event-footer{padding:0.65rem 0.8rem 0.75rem;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;}
.event-tag{font-size:0.75rem;color:var(--text-muted);}

/* แถวบทความแบบสไลด์ */
.article-scroller{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1rem;
}

/* การ์ดบทความ ใช้ event-card เป็นฐาน */
.article-card{}

/* ลิงก์ "บทความทั้งหมด" ด้านล่าง section */
.section-footer-link{
  margin-top:0.75rem;
  text-align:right;
  font-size:0.85rem;
}
.section-footer-link a{
  color:#1d4ed8;
  font-weight:500;
}
.section-footer-link a:hover{
  text-decoration:underline;
}

.register-wrapper{flex:1;display:flex;align-items:center;justify-content:center;padding:2rem 1rem;}
.register-card{background:#fff;border-radius:1rem;border:1px solid var(--border);max-width:520px;width:100%;padding:1.75rem 1.5rem 1.75rem;box-shadow:0 18px 40px rgba(15,23,42,0.08);}
.register-header{text-align:center;margin-bottom:1.25rem;}
.register-title{font-size:1.25rem;font-weight:800;color:var(--primary-dark);margin-bottom:0.35rem;}
.register-subtitle{font-size:0.9rem;color:var(--text-muted);}
.register-section-title{font-size:0.9rem;font-weight:700;margin:1rem 0 0.4rem;}
.form-group{margin-bottom:0.85rem;}
.form-group label{display:block;font-size:0.9rem;margin-bottom:0.25rem;}
.form-control,.form-select{width:100%;border-radius:0.7rem;border:1px solid var(--border);padding:0.6rem 0.75rem;font-size:1rem;background:#f9fafb;}
.form-control:focus,.form-select:focus{outline:2px solid rgba(25,118,210,0.2);border-color:var(--primary);background:#fff;}
.gender-group{display:flex;gap:1.25rem;margin-top:0.35rem;}
.gender-option{display:flex;align-items:center;gap:0.35rem;font-size:0.95rem;}
.time-row{display:flex;gap:0.75rem;align-items:center;flex-wrap:wrap;}
.time-row .time-select{flex:1 1 45%;}
.helper-text{font-size:0.8rem;color:var(--text-muted);margin-top:0.2rem;}
.register-actions{margin-top:1.4rem;text-align:center;}
.btn-full{width:100%;justify-content:center;padding:0.7rem 1.2rem;font-size:1rem;}
footer{background:#e5e9f2;margin-top:1.5rem;padding:1.25rem 0 1.5rem;font-size:0.85rem;color:var(--text-main);}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;}
.footer-heading{font-weight:700;margin-bottom:0.5rem;font-size:0.9rem;}
.footer-list{list-style:none;}
.footer-list li{margin-bottom:0.25rem;}
.footer-bottom{margin-top:1rem;font-size:0.8rem;color:var(--text-muted);}

@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media(max-width:720px){
  .nav-links{display:none;}
  .menu-toggle{display:block;}
  .card-grid,.card-grid-3{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}

  /* บทความแบบสไลด์บนมือถือ */
  .article-scroller{
    display:flex;
    overflow-x:auto;
    gap:0.75rem;
    padding-bottom:0.5rem;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
  }
  .article-card{
    flex:0 0 48%;   /* ประมาณ 2 ใบต่อจอแนวตั้ง */
    scroll-snap-align:start;
  }
}