:root{
  --black:#080b0f;
  --dark:#111820;
  --yellow:#f6c400;
  --brown:#7e625b;
  --text:#1f2933;
  --muted:#606975;
  --light:#f5f5f5;
  --white:#ffffff;
  --border:#dddddd;
}

*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Arial, Helvetica, sans-serif;color:var(--text);background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{width:min(1500px,93%);margin:auto}

/* Top bar / header */
.topbar{background:#070b10;color:#fff;font-size:14px;padding:8px 0}
.topbar .container{display:flex;justify-content:flex-end;gap:34px;align-items:center;flex-wrap:wrap}
header{background:#fff;border-bottom:1px solid #ddd}
.nav{min-height:88px;display:flex;justify-content:space-between;align-items:center;gap:30px}
.brand{display:flex;align-items:center;gap:14px}
.brand img{width:78px;height:78px;object-fit:contain}
.brand h1{font-size:22px;line-height:1.05;color:#000;letter-spacing:.2px}
.brand p{font-size:16px;color:#222;letter-spacing:.5px}
nav ul{display:flex;gap:34px;align-items:center;font-size:14px;font-weight:600;flex-wrap:wrap}
nav a{display:block;padding:32px 0 24px;border-bottom:4px solid transparent;text-transform:uppercase}
nav a:hover,nav a.active{border-bottom-color:var(--yellow)}

/* Hero */
.hero,.page-hero{height:330px;background:linear-gradient(90deg,rgba(4,8,12,.55) 0%,rgba(4,8,12,.25) 42%,rgba(4,8,12,.02) 100%),url('images/hero-tribology.jpg') center right/cover no-repeat;color:#fff;display:flex;align-items:center}
.hero-content{max-width:850px;padding:42px 0 50px}
.hero h2,.page-hero h2{font-size:48px;line-height:1.08;font-weight:800;margin-bottom:18px;text-transform:none}
.page-hero h2{text-transform:uppercase}
.hero h2 span,.page-hero h2 span{color:var(--yellow)}
.line{width:56px;height:4px;background:var(--yellow);margin:0 0 22px}
.hero p,.page-hero p{font-size:18px;max-width:760px;color:#f1f1f1;margin-bottom:22px}
.breadcrumb{font-size:14px;text-transform:uppercase;font-weight:700;margin-bottom:14px;color:#ddd}
.breadcrumb a{color:var(--yellow)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:14px;padding:12px 20px;border-radius:4px;font-weight:700;font-size:14px;text-transform:uppercase;transition:.2s ease;border:0;cursor:pointer}
.btn-yellow{background:var(--yellow);color:#000}
.btn-yellow:hover{background:#ffd633}
.btn-dark{background:#101820;color:#fff}
.btn-outline{color:#fff;border:1px solid rgba(255,255,255,.85)}
.btn-brown{background:var(--brown);color:#fff}

/* General sections */
.section{padding:66px 0}
.section-light{background:#f7f7f7}
.section-label{color:var(--yellow);font-weight:800;text-transform:uppercase;font-size:14px;letter-spacing:1px;margin-bottom:8px}
h3{font-size:34px;line-height:1.18;color:#101820;margin-bottom:18px}
h4{color:#111}
.lead{font-size:18px;color:#344054;max-width:950px;margin-bottom:18px}
p{margin-bottom:15px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.card{background:#fff;border:1px solid var(--border);border-radius:10px;padding:30px;box-shadow:0 10px 28px rgba(0,0,0,.06)}
.dark-section{background:#090e14;color:#fff;padding:66px 0}
.dark-section h3,.dark-section h4{color:#fff}
.dark-section p{color:#d9e0e8}
footer{background:#060b11;color:#d8d8d8;text-align:center;padding:14px 0;font-size:13px}

/* Index cards */
.main-cards{padding:18px 0 8px;background:#fff}
.cards-grid{display:grid;grid-template-columns:1fr 1.12fr;gap:32px}

.journal-card,
.conference-card{
  background:#f1f1f1;
  border-radius:9px;
  overflow:hidden;
  min-height:315px;
  display:grid;
  grid-template-columns:43% 57%;
  box-shadow:0 12px 30px rgba(0,0,0,.18);
}

.journal-cover,
.conference-cover{
  display:flex;
  justify-content:center;
  align-items:center;
  padding:18px;
}

.journal-cover img,
.conference-cover img{
  width:100%;
  max-height:315px;
  object-fit:contain;
}

.journal-cover img{filter:drop-shadow(0 10px 18px rgba(0,0,0,.65))}
.conference-cover img{filter:drop-shadow(0 8px 16px rgba(0,0,0,.2))}

.journal-text,
.conference-text{padding:45px 44px 30px}
.journal-text h3,
.conference-text h3{font-size:26px;margin-bottom:8px;text-transform:uppercase;color:var(--brown)}
.journal-text .small-line,
.conference-text .small-line{background:var(--brown)}
.journal-text p,
.conference-text p{color:#2d3136;margin-bottom:10px}
.journal-card .btn-outline{color:#2d3136;border:1px solid #2d3136}
.checks li{margin:9px 0;color:var(--text)}
.checks li::before{content:'✓';color:var(--yellow);border:1px solid var(--yellow);border-radius:50%;display:inline-flex;width:16px;height:16px;align-items:center;justify-content:center;font-size:11px;margin-right:12px}
.small-line{width:46px;height:4px;background:var(--yellow);margin-bottom:24px}
.info-list{margin:18px 0 24px}
.info-list li{margin:11px 0;color:#333;display:flex;gap:12px;align-items:center}

/* Quick links */
.quick-links{padding:8px 0 24px}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.quick-item{padding:18px 40px 18px 48px;border-right:1px solid #ddd;min-height:155px}
.quick-item:last-child{border-right:none}
.quick-icon{color:var(--yellow);font-size:37px;height:45px;margin-bottom:8px}
.quick-item h4{font-size:15px;margin-bottom:18px;text-transform:uppercase}
.quick-item p{color:#444;font-size:14px;margin-bottom:18px;max-width:270px}
.read-more{font-size:13px;font-weight:800;text-transform:uppercase}

/* About */
.two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start}
.info-card{background:#f4f4f4;border-radius:10px;padding:34px;border-left:6px solid var(--yellow)}
.info-card li{padding:11px 0;border-bottom:1px solid #ddd}
.info-card li:last-child{border-bottom:none}
.mission-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:34px}
.mission-card{background:#121a23;border:1px solid #27313c;border-radius:10px;padding:30px}
.mission-card .num{color:var(--yellow);font-size:38px;font-weight:900;margin-bottom:8px}
.activity-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #ddd;border-bottom:1px solid #ddd}
.activity{padding:32px;border-right:1px solid #ddd;min-height:230px}
.activity:last-child{border-right:none}
.activity-icon{font-size:38px;color:var(--yellow);margin-bottom:14px}
.history-box{background:#fff;border-radius:10px;padding:36px;box-shadow:0 10px 28px rgba(0,0,0,.06)}

/* Committee */
.committee-layout{display:grid;gap:28px;margin-top:30px}
.committee-row-2{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.committee-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:28px}
.committee-row-4{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.committee-card{background:#fff;border:1px solid #e6e6e6;border-radius:8px;overflow:hidden;box-shadow:0 5px 16px rgba(0,0,0,0.045);transition:all 0.2s ease}
.committee-card::before{content:"";display:block;height:3px;background:var(--yellow);width:100%}
.committee-card:hover{transform:translateY(-1px);box-shadow:0 6px 14px rgba(0,0,0,0.06)}
.committee-card .committee-role{background:#111820;color:var(--yellow);font-size:16px;font-weight:800;text-transform:uppercase;letter-spacing:1px;padding:13px 18px}
.committee-card-body{padding:16px 18px 18px}
.committee-card-body h4{margin:0;font-size:20px;font-weight:700;color:#111820;display:block}
.committee-card-body p{margin-top:4px;font-size:14px;color:#6b7280;display:block}

.executive-members-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:14px}
.member-mini-card .committee-role{display:none!important}
.member-mini-card .committee-card-body{padding:22px 16px 18px}
.member-mini-card .committee-card-body h4{font-size:18px}
.member-mini-card .committee-card-body p{font-size:13px}

.board-grid{list-style:none;padding:0;margin-top:10px;display:grid;grid-template-columns:repeat(5,1fr);gap:10px 20px}
.board-grid li{padding:8px 0;border-bottom:1px solid #f0f0f0;font-weight:normal}
.board-grid .board-name{margin:0;font-size:20px;font-weight:700;color:#111820;display:block}
.board-grid .board-affiliation{margin-top:4px;font-size:14px;color:#6b7280;display:block;font-weight:400}

/* Responsibilities */
.tasks-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:22px}
.task{background:#111820;padding:14px;border-radius:6px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}
.task i{font-size:30px;color:var(--yellow)}
.task span{font-size:18px;color:#fff;font-weight:700}
.dark-section .tasks-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:34px;border-top:1px solid #26313d;border-bottom:1px solid #26313d}
.dark-section .task{background:transparent;border-radius:0;border-right:1px solid #26313d;padding:30px;min-height:210px;display:block;text-align:left}
.dark-section .task:last-child{border-right:none}
.dark-section .task-icon{font-size:34px;color:var(--yellow);margin-bottom:14px}
.dark-section .task h4{font-size:17px;text-transform:uppercase;margin-bottom:12px;color:#fff}
.dark-section .task p{font-size:15px;color:#cbd5e1;line-height:1.6}

/* Journal page */
.journal-wrap{display:grid;grid-template-columns:380px 1fr;gap:52px;align-items:start}
.cover-box{background:#080b0f;border-radius:10px;padding:28px;box-shadow:0 14px 36px rgba(0,0,0,.18)}
.cover-box img{width:100%;display:block;filter:drop-shadow(0 12px 18px rgba(0,0,0,.65))}
.btns{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.fact{background:#f4f4f4;border-left:5px solid var(--yellow);padding:20px;border-radius:8px}
.fact strong{display:block;color:#111;font-size:15px;text-transform:uppercase;margin-bottom:6px}
.scope-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:34px;border-top:1px solid #26313d;border-bottom:1px solid #26313d}
.scope{padding:28px;border-right:1px solid #26313d}
.scope:last-child{border-right:none}
.scope-icon{font-size:34px;color:var(--yellow);margin-bottom:12px}
.info-box{background:#fff;border-radius:10px;padding:36px;box-shadow:0 10px 28px rgba(0,0,0,.06)}
.info-box li{padding:10px 0;border-bottom:1px solid #e5e5e5}
.info-box li:before{content:'✓';color:var(--yellow);font-weight:900;margin-right:10px}

/* Members */
.benefits{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #ddd;border-bottom:1px solid #ddd;margin-top:35px}
.benefit{padding:30px;border-right:1px solid #ddd;min-height:225px}
.benefit:last-child{border-right:none}
.benefit-icon{font-size:36px;color:var(--yellow);margin-bottom:12px}
.types{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:30px}
.type-card{background:#fff;border:1px solid #ddd;border-radius:10px;padding:30px;box-shadow:0 10px 28px rgba(0,0,0,.06)}
.tag{display:inline-block;background:#090e14;color:#fff;font-size:12px;font-weight:700;text-transform:uppercase;padding:5px 9px;margin-bottom:14px}
.type-card li{padding:8px 0;border-bottom:1px solid #eee}
.type-card li:before{content:'✓';color:var(--yellow);font-weight:900;margin-right:10px}
.form-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
.dark-box{background:#090e14;color:#fff;border-radius:10px;padding:34px}
.dark-box p{color:#d9e0e8}
.dark-box strong{color:var(--yellow)}
.form-box{background:#fff;border-radius:10px;padding:34px;box-shadow:0 12px 34px rgba(0,0,0,.09);border-top:6px solid var(--yellow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.full{grid-column:1 / -1}
label{font-weight:700;color:#111;font-size:14px}
input,select,textarea{width:100%;border:1px solid #ccc;border-radius:4px;padding:12px 13px;font-family:Arial,sans-serif;font-size:15px}
textarea{min-height:125px;resize:vertical}
.checkbox{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#4b5563}
.checkbox input{width:auto;margin-top:4px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:30px}
.step{background:#fff;border-left:6px solid var(--yellow);padding:26px;border-radius:8px}
.step strong{display:block;font-size:30px;color:#111;margin-bottom:8px}

/* News / contact */
.news-grid{display:grid;grid-template-columns:2fr 1fr;gap:40px}
.news-item{border-bottom:1px solid #ddd;padding-bottom:25px;margin-bottom:25px}
.date{color:var(--yellow);font-weight:700;font-size:14px;margin-bottom:6px}
.sidebar{background:#f7f7f7;padding:25px;border-radius:8px}
.event{margin-bottom:18px}
.event strong{display:block}
.contact-box{background:#090e14;color:#fff;padding:30px;border-radius:8px}
.contact-box p{color:#d1d5db}

/* Responsive */
@media(max-width:1050px){
  .nav{height:auto;align-items:flex-start;flex-direction:column;padding:14px 0}
  nav ul{gap:18px}
  nav a{padding:8px 0}
  .cards-grid,.quick-grid,.committee-grid,.tasks-grid,.mission-grid,.activity-grid,.benefits,.types,.form-wrap,.steps,.facts,.scope-grid{grid-template-columns:1fr 1fr}
  .journal-card,.conference-card{grid-template-columns:1fr}
  .journal-wrap{grid-template-columns:1fr}
  .cover-box{max-width:380px}
  .journal-text,.conference-text{padding:28px}
  .committee-row-4{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:900px){
  .committee-row-2,.committee-row-3{grid-template-columns:1fr}
  .board-grid{grid-template-columns:repeat(2,1fr)}
  .executive-members-grid{grid-template-columns:repeat(2,1fr)}
  .dark-section .tasks-grid{grid-template-columns:1fr 1fr}
}

@media(max-width:650px){
  .topbar .container{justify-content:center;gap:12px}
  .brand img{width:60px;height:60px}
  .brand h1{font-size:17px}
  .brand p{font-size:13px}
  .hero,.page-hero{height:auto;min-height:300px;padding:45px 0;background-position:center right}
  .hero h2,.page-hero h2{font-size:34px}
  .cards-grid,.quick-grid,.committee-grid,.tasks-grid,.mission-grid,.activity-grid,.benefits,.types,.form-wrap,.steps,.form-grid,.facts,.scope-grid,.news-grid,.grid-2,.two-col,.committee-row-4,.executive-members-grid,.board-grid{grid-template-columns:1fr}
  .quick-item,.activity,.task,.scope,.benefit{border-right:none;border-bottom:1px solid #ddd;padding:22px}
  .full{grid-column:auto}
  .journal-cover img,.conference-cover img{width:100%;max-height:315px;object-fit:contain}
  .dark-section .task{border-right:none;border-bottom:1px solid #26313d}
}