@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root{--accent:#dc2626;--accent-dark:#b91c1c;--bg:#0d0d0d;--bg2:#111827;--card:#1e293b;--border:rgba(255,255,255,0.08);--text:#f1f5f9;--text2:#94a3b8;--text3:#64748b;}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--text);font-family:'Poppins',sans-serif;line-height:1.6;}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;height:auto;}

/* ---- NAVBAR ---- */
.navbar{position:sticky;top:0;z-index:100;background:rgba(13,13,13,.93);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;padding:.85rem 1.5rem;max-width:1200px;margin:0 auto;}
.navbar-logo{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.2rem;color:#fff;text-decoration:none;}
.logo-accent{color:var(--accent);}
.navbar-links{display:flex;align-items:center;gap:1.5rem;list-style:none;}
.navbar-links a{font-size:.88rem;font-weight:500;color:var(--text2);text-decoration:none;transition:color .2s;}
.navbar-links a:hover{color:#fff;}
.navbar-cta{background:var(--accent)!important;color:#fff!important;padding:.4rem .9rem;border-radius:6px;font-weight:600!important;}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px;}
.hamburger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;}
.mobile-menu{display:none;flex-direction:column;padding:1rem 1.5rem;border-top:1px solid var(--border);background:#111;gap:.75rem;}
.mobile-menu a{font-size:.95rem;color:var(--text2);padding:.5rem 0;border-bottom:1px solid var(--border);text-decoration:none;}
.mobile-menu.open{display:flex;}

/* ---- FOOTER ---- */
footer{background:#0d0d0d;border-top:1px solid var(--border);padding:3rem 1.5rem 1.5rem;margin-top:4rem;}
.footer-inner{max-width:1200px;margin:0 auto;}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2rem;}
.footer-brand p{font-size:.85rem;color:var(--text3);line-height:1.6;margin-top:.75rem;}
.footer-col h4{font-size:.8rem;font-weight:700;color:#fff;text-transform:uppercase;letter-spacing:.5px;margin-bottom:.75rem;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:.5rem;}
.footer-col a{font-size:.85rem;color:var(--text3);text-decoration:none;}
.footer-col a:hover{color:#fff;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:1.5rem;border-top:1px solid var(--border);flex-wrap:wrap;gap:.75rem;}
.footer-bottom p{font-size:.8rem;color:#475569;}
.footer-legal{display:flex;gap:1rem;}
.footer-legal a{font-size:.8rem;color:#475569;text-decoration:none;}

/* ---- BOTTOM NAV MOBILE ---- */
.bottom-nav-fixed{display:none;position:fixed;bottom:0;left:0;right:0;z-index:200;background:#0f172a;border-top:1px solid #1e293b;padding:6px 0 env(safe-area-inset-bottom,6px);}
.bnav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:#94a3b8;font-size:.62rem;font-weight:600;text-decoration:none;text-transform:uppercase;letter-spacing:.3px;padding:4px 2px;}
.bnav-icon{font-size:1.15rem;line-height:1;}
.bnav-item:hover,.bnav-item.active{color:var(--accent);}
.back-top{position:fixed;bottom:5rem;right:1.5rem;width:40px;height:40px;background:var(--accent);color:#fff;border:none;border-radius:50%;cursor:pointer;font-size:1.1rem;display:none;align-items:center;justify-content:center;z-index:99;}

/* ---- RESPONSIVE ---- */
@media(max-width:768px){
  .navbar-links{display:none;}
  .hamburger{display:flex;}
  .footer-top{grid-template-columns:1fr;}
  .bottom-nav-fixed{display:flex;}
  body{padding-bottom:65px;}
}

/* ---- COMMON COMPONENTS ---- */
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem;}
.section{padding:3rem 1.5rem;max-width:1200px;margin:0 auto;}

/* Hero */
.hero{background:linear-gradient(135deg,#0d0d0d 0%,#1a0505 50%,#0d0d0d 100%);padding:4rem 1.5rem 3rem;text-align:center;border-bottom:1px solid var(--border);}
.hero h1{font-size:clamp(1.6rem,4vw,2.8rem);font-weight:700;color:#fff;margin-bottom:1rem;line-height:1.2;}
.hero h1 span{color:var(--accent);}
.hero p{font-size:1rem;color:var(--text2);max-width:620px;margin:0 auto 2rem;}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.5rem;}

/* Calculator */
.calc-box{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:2rem;max-width:760px;margin:0 auto;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;}
@media(max-width:600px){.form-grid{grid-template-columns:1fr;}}
.form-group{display:flex;flex-direction:column;gap:.4rem;}
.form-group label{font-size:.82rem;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.4px;}
.form-group select,.form-group input{background:#0f172a;border:1px solid #334155;border-radius:8px;padding:.7rem 1rem;color:#fff;font-family:'Poppins',sans-serif;font-size:.9rem;width:100%;}
.form-group select:focus,.form-group input:focus{outline:2px solid var(--accent);outline-offset:1px;}
.calc-btn{background:var(--accent);color:#fff;border:none;padding:.9rem 2rem;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;width:100%;margin-top:1rem;font-family:'Poppins',sans-serif;transition:background .2s;}
.calc-btn:hover{background:var(--accent-dark);}

/* Result */
.result-box{display:none;margin-top:1.5rem;background:#0f172a;border:1px solid #334155;border-radius:12px;padding:1.5rem;}
.result-box.show{display:block;}
.result-line{display:flex;justify-content:space-between;align-items:center;padding:.5rem 0;border-bottom:1px solid rgba(255,255,255,0.05);font-size:.9rem;}
.result-line:last-child{border-bottom:none;}
.result-label{color:var(--text2);}
.result-val{font-weight:600;color:#fff;}
.result-total{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:linear-gradient(135deg,#dc2626,#b91c1c);border-radius:8px;margin-top:1rem;}
.result-total span:first-child{font-weight:700;font-size:1rem;color:#fff;}
.result-total span:last-child{font-size:1.5rem;font-weight:700;color:#fff;}

/* Tables */
.table-wrap{overflow-x:auto;margin-top:1.5rem;}
table{width:100%;border-collapse:collapse;font-size:.88rem;}
th{background:#1e293b;color:var(--text2);font-weight:600;padding:.75rem 1rem;text-align:left;font-size:.8rem;text-transform:uppercase;letter-spacing:.4px;}
td{padding:.7rem 1rem;border-bottom:1px solid var(--border);color:var(--text);}
tr:hover td{background:rgba(255,255,255,0.03);}
.badge{display:inline-block;padding:.25rem .6rem;border-radius:20px;font-size:.75rem;font-weight:600;}
.badge-green{background:rgba(34,197,94,.15);color:#4ade80;}
.badge-red{background:rgba(239,68,68,.15);color:#f87171;}
.badge-yellow{background:rgba(251,191,36,.15);color:#fbbf24;}

/* Section titles */
.section-title{font-size:1.5rem;font-weight:700;color:#fff;margin-bottom:.5rem;}
.section-sub{font-size:.9rem;color:var(--text2);margin-bottom:2rem;}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border);padding:1.2rem 0;}
.faq-q{font-weight:600;color:#fff;margin-bottom:.5rem;font-size:.95rem;}
.faq-a{color:var(--text2);font-size:.88rem;line-height:1.7;}

/* Info boxes */
.info-box{background:rgba(220,38,38,.08);border:1px solid rgba(220,38,38,.2);border-radius:10px;padding:1.25rem 1.5rem;margin:1.5rem 0;}
.info-box p{font-size:.9rem;color:var(--text2);}
.tip-box{background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.2);border-radius:10px;padding:1.25rem 1.5rem;margin:1.5rem 0;}
.tip-box p{font-size:.9rem;color:#4ade80;}

/* Steps */
.steps{display:flex;flex-direction:column;gap:1.25rem;margin-top:1.5rem;}
.step{display:flex;gap:1rem;align-items:flex-start;}
.step-num{width:36px;height:36px;background:var(--accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;color:#fff;flex-shrink:0;}
.step-content h3{font-size:.95rem;font-weight:600;color:#fff;margin-bottom:.3rem;}
.step-content p{font-size:.85rem;color:var(--text2);}

/* Grid layouts */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;}
@media(max-width:768px){.grid-2,.grid-3{grid-template-columns:1fr;}}

/* Stat cards */
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.5rem;text-align:center;}
.stat-num{font-size:2rem;font-weight:700;color:var(--accent);}
.stat-label{font-size:.82rem;color:var(--text2);margin-top:.25rem;}

/* Tabs */
.tabs{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.5rem;}
.tab-btn{padding:.5rem 1.25rem;border-radius:20px;border:1px solid var(--border);background:transparent;color:var(--text2);font-size:.85rem;cursor:pointer;font-family:'Poppins',sans-serif;transition:all .2s;}
.tab-btn.active{background:var(--accent);border-color:var(--accent);color:#fff;}

/* Top/bottom bars for tables */
.top-bottom-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-top:1.5rem;}
@media(max-width:640px){.top-bottom-grid{grid-template-columns:1fr;}}