/* ===================== Header ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.header-top {
  background: var(--color-navy-deep);
  color: var(--color-sky-light);
  font-family: var(--font-ui);
  font-size: 0.8rem;
}
.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: 0.4rem;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.header-top .eiin { color: var(--color-amber); font-weight: 600; }

.header-main .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.8rem;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.brand img { width: 54px; height: 54px; border-radius: 0%; object-fit: cover; }
.brand-name h1 { font-size: 1.25rem; margin: 0; color: var(--color-navy-deep); }
.brand-name p { font-size: 0.8rem; color: var(--color-ink-soft); font-family: var(--font-ui); }

.navbar { display: flex; align-items: center; }
.nav-list { display: flex; gap: 1.6rem; font-family: var(--font-ui); font-weight: 500; font-size: 0.92rem; }
.nav-list a {
  position: relative;
  padding-block: 0.3rem;
  color: var(--color-ink);
  transition: color var(--transition-base);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--color-amber);
  transition: width var(--transition-base);
}
.nav-list a:hover, .nav-list a.active { color: var(--color-navy-deep); }
.nav-list a:hover::after, .nav-list a.active::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span { width: 26px; height: 3px; background: var(--color-navy-deep); border-radius: 2px; }

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .navbar {
    position: fixed;
    top: 0; right: -100%;
    width: min(78vw, 320px);
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 1.5rem 2rem;
    box-shadow: var(--shadow-lg);
    transition: right var(--transition-base);
    z-index: 200;
  }
  .navbar.open { right: 0; }
  .nav-list { flex-direction: column; gap: 1.4rem; }
}

/* খালি জায়গায় ট্যাপ করলে মোবাইল মেনু বন্ধ করার ব্যাকড্রপ
   (z-index অবশ্যই .site-header এর z-index (100) এর চেয়ে কম হতে হবে,
   নাহলে stacking context এর কারণে এটা navbar এর লিংকের উপরে বসে ট্যাপ আটকে দেয়) */
.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(14, 58, 92, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  z-index: 90;
}
.nav-backdrop.open { opacity: 1; visibility: visible; }

/* ===================== Hero Slider ===================== */
.hero-slider {
  position: relative;
  height: min(72vh, 560px);
  overflow: hidden;
  color: var(--color-white);
}
/* মোবাইলে 72vh অনেক লম্বা/সরু বক্স হয়ে যায়, ফলে ল্যান্ডস্কেপ ছবি cover করতে গিয়ে
   অতিরিক্ত ক্রপ/জুম হয়ে দেখাচ্ছিল — তাই মোবাইলে উচ্চতা কমিয়ে আনা হলো */
@media (max-width: 600px) {
  .hero-slider { height: 42vh; min-height: 240px; max-height: 320px; }
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 1s ease, transform 6s ease;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
}
.hero-slide.active { opacity: 1; transform: scale(1); z-index: 2; }
.hero-slide::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(14,58,92,0.85), rgba(14,58,92,0.35));
}
.hero-slide-content { position: relative; z-index: 3; max-width: 620px; padding: 0 1.25rem; }
.hero-slide-content h2 { color: var(--color-white); font-size: var(--fs-h1); margin-bottom: 0.8rem; }
.hero-slide-content p { font-size: 1.05rem; color: var(--color-sky-light); margin-bottom: 1.4rem; }

.hero-dots {
  position: absolute;
  bottom: 1.2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: 0.5rem;
  z-index: 4;
}
.hero-dots button {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.5);
  transition: all var(--transition-base);
}
.hero-dots button.active { background: var(--color-amber); width: 28px; border-radius: 6px; }

/* ===================== Main Grid (content + sidebar) ===================== */
.home-grid {
  display: grid;
  grid-template-columns: 2.3fr 1fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 960px) {
  .home-grid { grid-template-columns: 1fr; }
}

/* ===================== Sidebar / Notice Widget ===================== */
.sidebar-widget {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 1.4rem;
  border-top: 4px solid var(--color-amber);
}
.sidebar-widget h3 {
  display: flex; align-items: center; gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 1.15rem;
}
.notice-item {
  display: block;
  padding: 0.8rem 0;
  border-bottom: 1px dashed var(--color-border);
}
.notice-item:last-child { border-bottom: none; }
.notice-item .badge {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--color-danger);
  font-weight: 600;
}
.notice-item h4 { font-size: 0.95rem; color: var(--color-ink); margin: 0.2rem 0; font-family: var(--font-body); font-weight: 600; }
.notice-item time { font-size: 0.78rem; color: var(--color-ink-soft); font-family: var(--font-ui); }

/* ===================== Footer ===================== */
.site-footer {
  background: var(--color-navy-deep);
  color: var(--color-sky-light);
  margin-top: 3rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
  padding-block: 3rem;
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-grid h4 { color: var(--color-white); font-size: 1rem; margin-bottom: 1rem; font-family: var(--font-ui); }
.footer-grid ul li { margin-bottom: 0.6rem; }
.footer-grid a { color: var(--color-sky-light); opacity: 0.85; font-size: 0.9rem; transition: opacity var(--transition-base); }
.footer-grid a:hover { opacity: 1; color: var(--color-amber); }
.footer-social { display: flex; gap: 0.8rem; margin-top: 1rem; }
.footer-social a {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}
.footer-social a:hover { background: var(--color-amber); }
.footer-bottom {
  text-align: center;
  padding: 1rem;
  font-size: 0.82rem;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-family: var(--font-ui);
}