/* ============ AeroBD — Travel Agency & Air Ticketing ============ */
:root{
  --navy:#0b2545;
  --navy-2:#13315c;
  --sky:#0ea5e9;
  --sky-dark:#0284c7;
  --sky-light:#e0f2fe;
  --ink:#0f172a;
  --muted:#64748b;
  --bg:#ffffff;
  --bg-alt:#f8fafc;
  --gold:#f59e0b;
  --radius:14px;
  --shadow:0 10px 30px rgba(2,32,71,.10);
  --shadow-lg:0 20px 50px rgba(2,32,71,.16);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,.logo-text{font-family:'Poppins',system-ui,Arial,sans-serif}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1200px,92%);margin:0 auto}
.center{text-align:center}
em{font-style:normal;color:var(--sky)}

/* ============ Buttons ============ */
.btn{display:inline-block;padding:.85rem 1.9rem;border-radius:999px;font-weight:600;font-size:1rem;cursor:pointer;border:none;transition:.25s;font-family:'Poppins',sans-serif}
.btn-primary{background:linear-gradient(135deg,var(--sky),var(--sky-dark));color:#fff;box-shadow:0 8px 20px rgba(14,165,233,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(14,165,233,.45)}
.btn-outline{background:transparent;border:2px solid var(--navy);color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-outline-dark{background:transparent;border:2px solid #fff;color:#fff}
.btn-outline-dark:hover{background:#fff;color:var(--navy)}
.btn-light{background:#fff;color:var(--navy);box-shadow:0 8px 20px rgba(0,0,0,.15)}
.btn-light:hover{transform:translateY(-2px)}
.btn-block{display:block;width:100%;text-align:center}

/* ============ Top bar ============ */
.topbar{background:var(--navy);color:#cbd5e1;font-size:.85rem}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;padding:.45rem 0;gap:1rem;flex-wrap:wrap}
.topbar a{color:#cbd5e1}
.topbar a:hover{color:#fff}
.topbar-left{display:flex;gap:1.5rem;flex-wrap:wrap}
.topbar-right{display:flex;gap:.4rem}
.topbar-right a{display:inline-flex;width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,.1);align-items:center;justify-content:center;font-size:.7rem;font-weight:600}
.topbar-right a:hover{background:var(--sky)}

/* ============ Header ============ */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);box-shadow:0 2px 12px rgba(2,32,71,.08);transition:.3s}
.nav-inner{display:flex;justify-content:space-between;align-items:center;padding:.9rem 0;gap:1rem}
.logo{display:flex;align-items:center;gap:.55rem;font-size:1.5rem;font-weight:800;color:var(--navy)}
.logo-mark{height:46px;width:auto}
.nav{display:flex;align-items:center;gap:1.6rem}
.nav a{font-weight:500;font-size:.95rem;color:var(--ink);position:relative;transition:.2s}
.nav a:not(.nav-cta)::after{content:'';position:absolute;left:0;bottom:-4px;width:0;height:2px;background:var(--sky);transition:.25s}
.nav a:not(.nav-cta):hover::after,.nav a.active::after{width:100%}
.nav a:not(.nav-cta):hover{color:var(--sky-dark)}
.nav-cta{padding:.6rem 1.4rem}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:.3rem}
.hamburger span{width:26px;height:3px;background:var(--navy);border-radius:2px;transition:.3s}
.hamburger.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;padding:5.5rem 0 4.5rem;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:linear-gradient(135deg,#0b2545 0%,#13315c 45%,#0e4a8a 100%)}
.hero-bg::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 75% 25%,rgba(14,165,233,.45),transparent 45%),radial-gradient(circle at 15% 80%,rgba(56,189,248,.3),transparent 40%)}
.hero-bg::after{content:'✈';position:absolute;font-size:clamp(220px,32vw,420px);right:-4%;bottom:-8%;opacity:.10;transform:rotate(-12deg)}
.hero-inner{position:relative;text-align:center}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:800;line-height:1.15;margin-bottom:1rem}
.hero h1 span{background:linear-gradient(90deg,#7dd3fc,#38bdf8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:640px;margin:0 auto 2.4rem;color:#cbd5e1;font-size:1.1rem}

/* ============ Flight search ============ */
.flight-search{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);border-radius:20px;padding:1.6rem;backdrop-filter:blur(8px);box-shadow:var(--shadow-lg);text-align:left;max-width:1080px;margin:0 auto}
.fs-row{display:grid;grid-template-columns:repeat(6,1fr);gap:.9rem;margin-bottom:1.1rem}
.fs-field label{display:block;font-size:.78rem;font-weight:600;color:#7dd3fc;margin-bottom:.3rem;text-transform:uppercase;letter-spacing:.4px}
.fs-field select,.fs-field input{width:100%;padding:.7rem .8rem;border-radius:10px;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.1);color:#fff;font-size:.9rem;font-family:inherit;outline:none;transition:.2s;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%237dd3fc'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .7rem center;padding-right:1.6rem}
.fs-field select:focus,.fs-field input:focus{border-color:var(--sky);background:rgba(255,255,255,.16)}
.fs-field select option{color:#0f172a}
.fs-field input::-webkit-calendar-picker-indicator{filter:invert(1);cursor:pointer}
.fs-submit{width:100%;font-size:1.05rem;padding:1rem}
.fs-note{margin-top:.9rem;font-size:.85rem;color:#94a3b8;text-align:center}
.fs-note.success{color:#4ade80;font-weight:600}

/* ============ Stats ============ */
.stats{background:#fff;padding:2.6rem 0;margin-top:-3rem;position:relative;z-index:5}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;text-align:center}
.stat strong{display:block;font-family:'Poppins';font-size:2.6rem;font-weight:800;color:var(--navy);line-height:1}
.stat span{color:var(--muted);font-size:.95rem}

/* ============ Sections ============ */
.section{padding:4.5rem 0}
.section-alt{background:var(--bg-alt)}
.section-title{font-size:clamp(1.7rem,3.4vw,2.4rem);font-weight:800;text-align:center;color:var(--navy);margin-bottom:.5rem}
.section-title.left{text-align:left}
.section-sub{text-align:center;color:var(--muted);max-width:620px;margin:0 auto 2.6rem}

/* ============ Routes ============ */
.route-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;margin-bottom:2.4rem}
.route-card{background:#fff;border:1px solid #e2e8f0;border-radius:var(--radius);padding:1.2rem;display:flex;flex-direction:column;gap:.25rem;transition:.25s;position:relative;overflow:hidden}
.route-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--sky),transparent);opacity:0;transition:.25s}
.route-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--sky)}
.route-card:hover::before{opacity:1}
.route-code{font-family:'Poppins';font-weight:700;color:var(--navy);font-size:1.05rem}
.route-name{color:var(--muted);font-size:.85rem}
.route-air{color:#94a3b8;font-size:.78rem}
.route-price{margin-top:auto;font-family:'Poppins';font-weight:800;color:var(--sky-dark);font-size:1.25rem}
.route-price small{color:var(--muted);font-weight:400;font-size:.75rem}

/* ============ Services ============ */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem}
.service-card{background:#fff;border-radius:var(--radius);padding:1.8rem 1.5rem;transition:.25s;border:1px solid #eef2f7}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.service-icon{font-size:2.2rem;margin-bottom:1rem}
.service-card h3{font-size:1.15rem;color:var(--navy);margin-bottom:.5rem}
.service-card p{color:var(--muted);font-size:.9rem}

/* ============ Why us ============ */
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.why-media{position:relative;min-height:380px;background:linear-gradient(135deg,var(--sky-light),#bae6fd);border-radius:24px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.why-photo{font-size:9rem;filter:drop-shadow(0 20px 40px rgba(2,32,71,.25));animation:float 4s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0) rotate(-6deg)}50%{transform:translateY(-18px) rotate(-3deg)}}
.why-card-float{position:absolute;background:#fff;border-radius:12px;padding:.7rem 1.1rem;font-weight:600;font-size:.85rem;color:var(--navy);box-shadow:var(--shadow);font-family:'Poppins'}
.why-card-1{top:8%;left:6%}
.why-card-2{top:42%;right:5%}
.why-card-3{bottom:8%;left:10%}
.why-content p{color:var(--muted);margin-bottom:1.4rem}
.check-list{list-style:none;margin-bottom:2rem;display:grid;gap:.7rem}
.check-list li{display:flex;gap:.7rem;align-items:flex-start;font-size:.98rem}
.check-list span{flex:none;width:24px;height:24px;border-radius:50%;background:var(--sky-light);color:var(--sky-dark);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700}

/* ============ Packages ============ */
.package-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.8rem}
.package-card{background:#fff;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);transition:.3s;position:relative;border:1px solid #eef2f7}
.package-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.package-card.popular{border:2px solid var(--sky)}
.pkg-badge{position:absolute;top:14px;right:-2px;background:var(--gold);color:#fff;font-size:.72rem;font-weight:700;padding:.35rem .9rem;border-radius:6px 0 0 6px;z-index:2;box-shadow:0 4px 10px rgba(245,158,11,.4)}
.pkg-img{height:150px;display:flex;align-items:center;justify-content:center;font-size:4.5rem;color:#fff}
.pkg-1{background:linear-gradient(135deg,#06b6d4,#0369a1)}
.pkg-2{background:linear-gradient(135deg,#f59e0b,#dc2626)}
.pkg-3{background:linear-gradient(135deg,#059669,#065f46)}
.pkg-body{padding:1.6rem}
.pkg-body h3{color:var(--navy);font-size:1.25rem;margin-bottom:.15rem}
.pkg-days{color:var(--sky-dark);font-size:.85rem;font-weight:600;margin-bottom:.9rem}
.pkg-body ul{list-style:none;display:grid;gap:.4rem;margin-bottom:1.1rem;color:var(--muted);font-size:.9rem}
.pkg-body ul li::before{content:'✓ ';color:var(--sky-dark);font-weight:700}
.pkg-price{font-family:'Poppins';font-size:1.5rem;font-weight:800;color:var(--navy);margin-bottom:1rem}
.pkg-price small{color:var(--muted);font-weight:400;font-size:.8rem}

/* ============ About ============ */
.about-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:3rem;align-items:center}
.about-content p{color:var(--muted);margin-bottom:1rem}
.about-points{display:flex;gap:2.5rem;margin-top:1.6rem}
.about-points strong{display:block;font-family:'Poppins';font-size:1.8rem;color:var(--navy)}
.about-points span{color:var(--muted);font-size:.85rem}
.about-photo{height:380px;border-radius:24px;background:linear-gradient(135deg,#e0f2fe,#bae6fd);display:flex;align-items:center;justify-content:center;padding:1.5rem;box-shadow:var(--shadow)}
.about-photo img{max-height:320px;max-width:100%;filter:drop-shadow(0 16px 30px rgba(2,32,71,.18))}

/* ============ Testimonials ============ */
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.testimonial{background:#fff;border-radius:var(--radius);padding:1.8rem;box-shadow:var(--shadow);border-top:4px solid var(--sky)}
.testimonial p{color:var(--muted);font-size:.95rem;margin-bottom:1.2rem;font-style:italic}
.testimonial strong{color:var(--navy);font-size:.9rem}

/* ============ CTA ============ */
.cta{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:4rem 0;text-align:center;position:relative;overflow:hidden}
.cta::after{content:'✈';position:absolute;font-size:200px;right:-3%;top:-20%;opacity:.08;transform:rotate(-15deg)}
.cta h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;margin-bottom:.6rem}
.cta p{color:#cbd5e1;margin-bottom:1.8rem}
.cta-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.cta .btn{padding:.9rem 2rem}

/* ============ Contact ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:3rem}
.contact-info p{color:var(--muted);margin-bottom:1.6rem}
.contact-list{list-style:none;display:grid;gap:1.1rem}
.contact-list li{display:flex;gap:.9rem;align-items:flex-start}
.contact-list li>span{font-size:1.3rem;line-height:1.4}
.contact-list a{color:var(--sky-dark);font-weight:600}
.contact-list a:hover{text-decoration:underline}
.contact-form{background:#fff;border-radius:18px;padding:2rem;box-shadow:var(--shadow-lg);border:1px solid #eef2f7}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-field{margin-bottom:1rem}
.form-field label{display:block;font-size:.82rem;font-weight:600;color:var(--navy);margin-bottom:.35rem}
.form-field input,.form-field select,.form-field textarea{width:100%;padding:.75rem .9rem;border:1px solid #e2e8f0;border-radius:10px;font-family:inherit;font-size:.95rem;outline:none;transition:.2s;background:#f8fafc}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--sky);background:#fff;box-shadow:0 0 0 3px rgba(14,165,233,.15)}
.form-field textarea{resize:vertical}
.form-note{margin-top:.8rem;font-size:.88rem;color:#16a34a;font-weight:600;text-align:center;min-height:1.2em}

/* ============ Footer ============ */
.footer{background:var(--navy);color:#94a3b8;padding-top:3.5rem}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:2.5rem;padding-bottom:2.5rem}
.footer-logo{display:inline-flex;margin-bottom:1.2rem}
.footer-logo-img{height:60px;width:auto;background:#fff;border-radius:12px;padding:6px 16px;box-shadow:0 6px 16px rgba(0,0,0,.3)}
.footer-col p{font-size:.9rem;margin-top:.8rem}
.footer-col h4{color:#fff;margin-bottom:1rem;font-size:1rem}
.footer-col a{display:block;font-size:.9rem;margin-bottom:.55rem;transition:.2s}
.footer-col a:hover{color:var(--sky);transform:translateX(3px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:1.1rem 0;font-size:.82rem;text-align:center}

/* ============ Back to top ============ */
.back-to-top{position:fixed;right:1.4rem;bottom:1.4rem;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--sky),var(--sky-dark));color:#fff;border:none;font-size:1.2rem;cursor:pointer;box-shadow:0 8px 20px rgba(14,165,233,.4);opacity:0;pointer-events:none;transition:.3s;z-index:90}
.back-to-top.show{opacity:1;pointer-events:auto}
.back-to-top:hover{transform:translateY(-3px)}

/* ============ Reveal animation ============ */
.reveal{opacity:0;transform:translateY(24px);transition:.6s ease}
.reveal.visible{opacity:1;transform:none}

/* ============ Responsive ============ */
@media(max-width:1024px){
  .route-grid,.service-grid{grid-template-columns:repeat(2,1fr)}
  .package-grid,.testimonial-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .fs-row{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
  .header{backdrop-filter:none;background:#fff}
  .nav{position:fixed;top:0;right:0;bottom:0;left:35%;background:#fff;flex-direction:column;justify-content:center;gap:1.4rem;padding:2rem;transform:translateX(100%);transition:.35s;box-shadow:-10px 0 40px rgba(2,32,71,.15);z-index:99}
  .nav.open{transform:none}
  .nav a{font-size:1.15rem}
  .nav-cta{text-align:center}
  .hamburger{display:flex;position:relative;z-index:110}
  .why-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
  .why-media{min-height:300px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:2rem}
  .fs-row{grid-template-columns:repeat(2,1fr)}
  .topbar-right{display:none}
  .hero{padding:3.5rem 0 3rem}
}
@media(max-width:480px){
  .route-grid,.service-grid,.fs-row,.form-row{grid-template-columns:1fr}
  .about-points{gap:1.2rem;flex-wrap:wrap}
}