:root{
  --sib-blue:#0a4d9c;
  --sib-blue-dark:#063a78;
  --sib-blue-light:#3d8be0;
  --sib-sky:#e8f1fb;
  --sib-accent:#1ea7e0;
  --sib-text:#1a2540;
  --sib-muted:#5a6a85;
}
*{box-sizing:border-box}
html,body{scroll-behavior:smooth}
body{
  font-family:'Inter','Segoe UI',system-ui,sans-serif;
  color:var(--sib-text);
  background:#fff;
  line-height:1.65;
}
h1,h2,h3,h4,h5{font-family:'Poppins',sans-serif;font-weight:700;color:var(--sib-blue-dark);letter-spacing:-.01em}
h1{font-weight:800}
a{color:var(--sib-blue);text-decoration:none}
a:hover{color:var(--sib-blue-dark)}
.text-sib{color:var(--sib-blue)!important}
.bg-sib{background:var(--sib-blue)!important;color:#fff}
.bg-sib-soft{background:var(--sib-sky)!important}

/* Buttons */
.btn-sib{background:var(--sib-blue);color:#fff;border:none;padding:.7rem 1.6rem;border-radius:50px;font-weight:600;transition:.25s}
.btn-sib:hover{background:var(--sib-blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 25px -10px rgba(10,77,156,.55)}
.btn-outline-sib{border:2px solid #fff;color:#fff;padding:.65rem 1.55rem;border-radius:50px;font-weight:600;background:transparent;transition:.25s}
.btn-outline-sib:hover{background:#fff;color:var(--sib-blue)}

/* Navbar */
.navbar-sib{background:rgba(255,255,255,.95);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(10,77,156,.08);padding:.75rem 0}
.navbar-sib .navbar-brand{display:flex;align-items:center;gap:.7rem;font-weight:700;color:var(--sib-blue-dark)}
.navbar-sib .navbar-brand img{height:48px;width:auto}
.navbar-sib .brand-text{line-height:1.05}
.navbar-sib .brand-text small{color:var(--sib-muted);font-weight:500;font-size:.7rem;letter-spacing:.5px}
.navbar-sib .nav-link{font-weight:500;color:var(--sib-text);margin:0 .25rem;position:relative}
.navbar-sib .nav-link.active,.navbar-sib .nav-link:hover{color:var(--sib-blue)}
.navbar-sib .nav-link.active::after{content:"";position:absolute;left:1rem;right:1rem;bottom:.25rem;height:2px;background:var(--sib-blue);border-radius:2px}
.navbar-sib .dropdown-toggle::after{border:none;content:"\F282";font-family:"bootstrap-icons";font-size:.65rem;vertical-align:middle;margin-left:.25rem}
.sib-dropdown{border:none;border-radius:14px;box-shadow:0 12px 40px rgba(10,77,156,.14);padding:.5rem;min-width:190px;margin-top:.5rem}
.sib-dropdown .dropdown-item{border-radius:9px;font-size:.88rem;font-weight:500;color:var(--sib-text);padding:.55rem .9rem;transition:.15s}
.sib-dropdown .dropdown-item:hover,.sib-dropdown .dropdown-item:focus{background:var(--sib-sky);color:var(--sib-blue)}
.sib-dropdown .dropdown-item.active{background:var(--sib-blue);color:#fff}
.sib-dropdown .dropdown-item i{color:var(--sib-blue-light)}
.sib-dropdown .dropdown-item.active i{color:#fff}

/* Hero / Slider */
.hero-slider .carousel-item{height:90vh;min-height:560px;background-size:cover;background-position:center;position:relative}
.hero-slider .carousel-item::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(6,58,120,.88) 0%,rgba(10,77,156,.65) 50%,rgba(30,167,224,.45) 100%)}
.hero-slider .carousel-caption{top:50%;bottom:auto;transform:translateY(-50%);text-align:left;left:8%;right:8%;max-width:780px}
.hero-slider h1{color:#fff;font-size:clamp(2rem,4.5vw,3.6rem);margin-bottom:1rem;text-shadow:0 4px 30px rgba(0,0,0,.3)}
.hero-slider p{color:rgba(255,255,255,.92);font-size:1.15rem;margin-bottom:1.8rem;max-width:620px}
.hero-slider .carousel-indicators{bottom:2rem}
.hero-slider .carousel-indicators button{width:36px;height:4px;border-radius:2px;background:rgba(255,255,255,.5)}
.hero-slider .carousel-indicators .active{background:#fff}

/* Section */
section{padding:5rem 0}
.section-tag{display:inline-block;background:var(--sib-sky);color:var(--sib-blue);font-weight:600;padding:.35rem 1rem;border-radius:50px;font-size:.8rem;letter-spacing:1px;text-transform:uppercase;margin-bottom:1rem}
.section-title{font-size:clamp(1.8rem,3vw,2.6rem);margin-bottom:1rem}
.section-sub{color:var(--sib-muted);max-width:680px;margin:0 auto 3rem}

/* Mission */
.mission-card{background:#fff;border:1px solid rgba(10,77,156,.08);border-radius:18px;padding:2rem;height:100%;transition:.3s;box-shadow:0 4px 20px rgba(10,77,156,.04)}
.mission-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px -20px rgba(10,77,156,.25);border-color:transparent}
.mission-icon{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--sib-blue),var(--sib-accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:1.25rem;box-shadow:0 8px 20px -8px var(--sib-blue)}

/* Stats */
.stats-section{background:linear-gradient(135deg,var(--sib-blue-dark) 0%,var(--sib-blue) 60%,var(--sib-accent) 100%);color:#fff;position:relative;overflow:hidden}
.stats-section::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 50%,rgba(255,255,255,.1),transparent 50%),radial-gradient(circle at 80% 80%,rgba(255,255,255,.08),transparent 40%)}
.stat-item{text-align:center;padding:1.5rem;position:relative}
.stat-num{font-family:'Poppins';font-size:3.2rem;font-weight:800;color:#fff;line-height:1}
.stat-label{color:rgba(255,255,255,.85);text-transform:uppercase;letter-spacing:1.5px;font-size:.85rem;margin-top:.6rem;font-weight:500}

/* Activities */
.activity-card{background:#fff;border-radius:18px;overflow:hidden;height:100%;transition:.3s;box-shadow:0 6px 24px rgba(10,77,156,.07)}
.activity-card:hover{transform:translateY(-8px);box-shadow:0 24px 50px -20px rgba(10,77,156,.3)}
.activity-img{height:220px;background-size:cover;background-position:center;position:relative}
.activity-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,rgba(6,58,120,.45))}
.activity-body{padding:1.6rem}
.activity-body h4{font-size:1.2rem;margin-bottom:.6rem}
.activity-body p{color:var(--sib-muted);font-size:.95rem;margin-bottom:1rem}

/* Leadership */
.leader-card{background:#fff;border-radius:20px;padding:2rem 1.5rem;text-align:center;height:100%;transition:.3s;border:1px solid rgba(10,77,156,.08)}
.leader-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px -20px rgba(10,77,156,.25)}
.leader-avatar{width:120px;height:120px;border-radius:50%;margin:0 auto 1.2rem;background:linear-gradient(135deg,var(--sib-sky),#fff);display:flex;align-items:center;justify-content:center;font-size:2.4rem;color:var(--sib-blue);font-weight:700;border:4px solid var(--sib-sky)}
.leader-card h5{margin-bottom:.25rem;font-size:1.15rem}
.leader-role{color:var(--sib-blue);font-weight:600;font-size:.9rem;text-transform:uppercase;letter-spacing:1px}
.leader-bio{color:var(--sib-muted);font-size:.9rem;margin-top:.75rem}
.leader-social{margin-top:1rem;display:flex;justify-content:center;gap:.5rem}
.leader-social a{width:36px;height:36px;border-radius:50%;background:var(--sib-sky);color:var(--sib-blue);display:inline-flex;align-items:center;justify-content:center;transition:.2s}
.leader-social a:hover{background:var(--sib-blue);color:#fff}
.leaders-carousel{position:relative;padding:0 2.6rem}
.leaders-carousel-viewport{overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;scrollbar-width:none;-ms-overflow-style:none;padding:.4rem .15rem .85rem}
.leaders-carousel-viewport::-webkit-scrollbar{display:none}
.leaders-carousel-track{display:grid;grid-auto-flow:column;grid-auto-columns:calc((100% - 4.5rem)/4);gap:1.5rem;align-items:stretch}
.leaders-carousel-slide{scroll-snap-align:start}
.leaders-carousel-btn{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:52px;height:52px;border:none;border-radius:50%;background:#fff;color:var(--sib-blue);box-shadow:0 16px 34px -18px rgba(10,77,156,.55);display:inline-flex;align-items:center;justify-content:center;font-size:1.55rem;transition:.2s}
.leaders-carousel-btn:hover{background:var(--sib-blue);color:#fff;transform:translateY(-50%) scale(1.04)}
.leaders-carousel-btn:disabled{opacity:.35;cursor:not-allowed;transform:translateY(-50%)}
.leaders-carousel-btn-prev{left:-8px}
.leaders-carousel-btn-next{right:-8px}

/* Join CTA */
.cta-section{background:linear-gradient(120deg,var(--sib-blue) 0%,var(--sib-blue-dark) 100%);color:#fff;border-radius:24px;padding:4rem 2rem;text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:"";position:absolute;width:400px;height:400px;border-radius:50%;background:rgba(255,255,255,.06);top:-150px;right:-100px}
.cta-section::after{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.05);bottom:-120px;left:-80px}
.cta-section h2{color:#fff;font-size:clamp(1.8rem,3vw,2.6rem)}
.cta-section p{color:rgba(255,255,255,.9);max-width:620px;margin:1rem auto 2rem}
.cta-section .btn-outline-sib{position:relative;z-index:2}
.cta-section .btn-light{position:relative;z-index:2;background:#fff;color:var(--sib-blue);border:none;padding:.7rem 1.6rem;border-radius:50px;font-weight:600}

/* Contact */
.contact-card{background:#fff;border-radius:18px;padding:2rem;height:100%;border:1px solid rgba(10,77,156,.08);text-align:center;transition:.3s}
.contact-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px -16px rgba(10,77,156,.25)}
.contact-icon{width:60px;height:60px;border-radius:50%;background:var(--sib-sky);color:var(--sib-blue);display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin:0 auto 1rem}
.contact-form .form-control{border:1px solid rgba(10,77,156,.15);border-radius:12px;padding:.85rem 1.1rem;background:#f8fafd}
.contact-form .form-control:focus{border-color:var(--sib-blue);box-shadow:0 0 0 4px rgba(10,77,156,.1);background:#fff}

/* Page header */
.page-header{background:linear-gradient(120deg,var(--sib-blue-dark),var(--sib-blue) 70%,var(--sib-accent));color:#fff;padding:7rem 0 4rem;text-align:center;position:relative;overflow:hidden}
.page-header::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 20%,rgba(255,255,255,.12),transparent 50%)}
.page-header h1{color:#fff;font-size:clamp(2rem,4vw,3rem)}
.page-header p{color:rgba(255,255,255,.9);max-width:680px;margin:1rem auto 0}
.breadcrumb-sib{display:inline-flex;background:rgba(255,255,255,.15);padding:.5rem 1.2rem;border-radius:50px;backdrop-filter:blur(10px);margin-top:1.2rem}
.breadcrumb-sib a,.breadcrumb-sib span{color:#fff;font-size:.9rem;margin:0 .35rem}

/* Event/News card */
.event-card{background:#fff;border-radius:18px;overflow:hidden;display:flex;height:100%;box-shadow:0 6px 24px rgba(10,77,156,.07);transition:.3s}
.event-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -20px rgba(10,77,156,.3)}
.event-date{flex:0 0 110px;background:linear-gradient(135deg,var(--sib-blue),var(--sib-accent));color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:1rem}
.event-date .day{font-size:2.2rem;font-weight:800;line-height:1;font-family:'Poppins'}
.event-date .month{text-transform:uppercase;letter-spacing:2px;font-size:.8rem;margin-top:.25rem}
.event-body{padding:1.4rem 1.6rem}
.event-body h5{font-size:1.1rem;margin-bottom:.4rem}
.event-meta{font-size:.85rem;color:var(--sib-muted);margin-bottom:.5rem}
.event-meta i{color:var(--sib-blue);margin-right:.3rem}
.list-check{list-style:none;padding:0;margin:1.5rem 0 0}
.list-check li{position:relative;padding-left:2rem;margin-bottom:.85rem;color:var(--sib-text)}
.list-check li::before{content:"\F26E";font-family:"bootstrap-icons";position:absolute;left:0;top:.1rem;color:var(--sib-blue)}

/* Membership */
.tier-card{background:#fff;border-radius:22px;padding:2.5rem 2rem;text-align:center;border:2px solid rgba(10,77,156,.08);height:100%;transition:.3s;position:relative}
.tier-card:hover{transform:translateY(-6px);box-shadow:0 24px 48px -24px rgba(10,77,156,.3)}
.tier-card.featured{border-color:var(--sib-blue);box-shadow:0 18px 40px -20px rgba(10,77,156,.35)}
.tier-card.featured::before{content:"Most Popular";position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--sib-blue);color:#fff;padding:.3rem 1rem;border-radius:50px;font-size:.75rem;font-weight:600;letter-spacing:1px}
.tier-name{color:var(--sib-blue);font-weight:700;text-transform:uppercase;letter-spacing:2px;font-size:.9rem;margin-bottom:.5rem}
.tier-price{font-family:'Poppins';font-size:2.6rem;font-weight:800;color:var(--sib-blue-dark);line-height:1}
.tier-price small{font-size:1rem;color:var(--sib-muted);font-weight:500}
.tier-features{list-style:none;padding:0;margin:1.5rem 0}
.tier-features li{padding:.6rem 0;border-bottom:1px dashed rgba(10,77,156,.1);color:var(--sib-text)}
.tier-features li i{color:var(--sib-blue);margin-right:.5rem}
.tier-features li:last-child{border-bottom:none}

/* Footer */
footer{background:#0a1f3d;color:rgba(255,255,255,.75);padding:4rem 0 1.5rem;margin-top:4rem}
footer h5{color:#fff;font-size:1rem;text-transform:uppercase;letter-spacing:2px;margin-bottom:1.2rem}
footer a{color:rgba(255,255,255,.7);transition:.2s}
footer a:hover{color:#fff}
footer ul{list-style:none;padding:0}
footer ul li{margin-bottom:.6rem}
footer .footer-brand{display:flex;align-items:center;gap:.7rem;margin-bottom:1rem}
footer .footer-brand img{height:50px;background:#fff;padding:6px;border-radius:10px}
.social-links{display:flex;gap:.6rem;margin-top:1rem}
.social-links a{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.08);display:inline-flex;align-items:center;justify-content:center;color:#fff}
.social-links a:hover{background:var(--sib-blue);transform:translateY(-2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:1.5rem;margin-top:3rem;font-size:.9rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem}

@media(max-width:768px){
  .navbar-sib .navbar-brand img{height:36px}
  .navbar-sib .brand-text div{font-size:.82rem}
  .navbar-sib .brand-text small{font-size:.6rem}
  .navbar-toggler{padding:.2rem .45rem;font-size:.8rem;border-radius:8px}
  .navbar-toggler-icon{width:1.1em;height:1.1em}
  section{padding:3.5rem 0}
  .hero-slider .carousel-item{height:80vh;min-height:480px}
  .hero-slider .carousel-caption{left:5%;right:5%;text-align:center}
  .hero-slider p{margin-left:auto;margin-right:auto}
  .event-card{flex-direction:column}
  .event-date{flex:0 0 auto;padding:1.25rem}
  .leaders-carousel{padding:0 1.8rem}
  .leaders-carousel-track{grid-auto-columns:100%;gap:1rem}
  .leaders-carousel-btn{width:42px;height:42px;font-size:1.2rem}
  .leaders-carousel-btn-prev{left:-2px}
  .leaders-carousel-btn-next{right:-2px}
}

@media(max-width:992px) and (min-width:769px){
  .leaders-carousel-track{grid-auto-columns:calc((100% - 1.2rem)/2);gap:1.2rem}
}

@media(min-width:993px) and (max-width:1200px){
  .leaders-carousel-track{grid-auto-columns:calc((100% - 2.6rem)/3);gap:1.3rem}
}

/* President's Desk */
.president-section{background:linear-gradient(180deg,#fff 0%,var(--sib-sky) 100%);padding:5rem 0}
.president-photo-wrap{display:inline-block;padding:8px;background:#fff;border-radius:20px;box-shadow:0 20px 50px -20px rgba(10,77,156,.35);position:relative}
.president-photo-wrap::before{content:"";position:absolute;inset:-12px;border:2px solid var(--sib-blue);border-radius:24px;opacity:.25}
.president-photo{width:240px;height:300px;object-fit:cover;border-radius:14px;display:block}
.president-message{background:#fff;padding:2.5rem 2.75rem;border-radius:18px;box-shadow:0 15px 45px -20px rgba(10,77,156,.2);position:relative;border-left:5px solid var(--sib-blue)}
.president-message p{color:var(--sib-text);font-size:1.05rem;margin-bottom:1rem}
.president-message .quote-icon{position:absolute;top:1rem;right:1.5rem;font-size:4rem;color:var(--sib-sky);line-height:1;z-index:0;pointer-events:none}
.president-message p,.president-message .president-signoff,.president-message .president-signature{position:relative;z-index:1}
.president-signoff{font-family:'Poppins',sans-serif;font-weight:700;color:var(--sib-blue);font-size:1.25rem;margin-top:1.25rem !important}
.president-signature{font-style:italic;color:var(--sib-muted);margin-top:.5rem}
@media(max-width:768px){.president-photo{width:200px;height:250px}.president-message{padding:1.75rem}}

/* Event details */
.entry-hero{position:relative;overflow:hidden;padding:5.3rem 0 4rem;color:#fff;background:linear-gradient(125deg,var(--sib-blue-dark) 0%,var(--sib-blue) 55%,var(--sib-accent) 100%)}
.entry-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.26;filter:contrast(1.1) saturate(1.08)}
.entry-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(6,58,120,.86) 0%,rgba(10,77,156,.73) 50%,rgba(14,106,175,.5) 100%)}
.entry-hero-content{position:relative;z-index:2;max-width:860px}
.entry-hero-content h1{color:#fff;font-size:clamp(2rem,4.4vw,3.2rem);margin:.9rem 0 .7rem}
.entry-hero-content p{margin:0 0 1rem;color:rgba(255,255,255,.9);font-size:1.06rem}
.entry-type-badge{display:inline-flex;align-items:center;gap:.4rem;padding:.38rem .95rem;border-radius:999px;background:rgba(255,255,255,.18);font-weight:700;font-size:.75rem;letter-spacing:.09em}
.entry-meta-chips{display:flex;flex-wrap:wrap;gap:.65rem;margin:1rem 0 1.35rem}
.entry-meta-chips span{display:inline-flex;align-items:center;gap:.45rem;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);backdrop-filter:blur(7px);padding:.45rem .8rem;border-radius:999px;font-size:.85rem}
.entry-meta-chips i{font-size:.95rem}
.entry-details-section{background:linear-gradient(180deg,#f5f9ff 0%,#ffffff 100%)}
.entry-main-card,.entry-side-card{background:#fff;border:1px solid rgba(10,77,156,.12);border-radius:20px;box-shadow:0 16px 40px -24px rgba(10,77,156,.35)}
.entry-main-card{padding:2rem 2rem 2.2rem}
.entry-main-card h2{font-size:1.3rem;margin-bottom:.9rem}
.entry-content-text{color:#2a3a59;font-size:1.02rem;line-height:1.9}
.entry-side-card{padding:1.35rem 1.2rem;position:sticky;top:92px}
.entry-side-card h3{font-size:1.05rem;margin-bottom:1rem}
.entry-side-list{list-style:none;padding:0;margin:0 0 1.15rem}
.entry-side-list li{display:flex;justify-content:space-between;gap:.8rem;padding:.7rem .1rem;border-bottom:1px dashed rgba(10,77,156,.15)}
.entry-side-list li:last-child{border-bottom:none}
.entry-side-list span{color:var(--sib-muted);font-size:.88rem}
.entry-side-list strong{color:var(--sib-text);font-size:.9rem;text-align:right}
.entry-actions{display:flex;flex-direction:column;gap:.6rem}
.entry-actions .btn{border-radius:12px;font-weight:600}

@media(max-width:992px){
  .entry-side-card{position:static}
}

@media(max-width:768px){
  .entry-hero{padding:4.2rem 0 3.3rem}
  .entry-main-card{padding:1.45rem}
  .entry-content-text{font-size:.98rem}
}