/* MyBandScore — English Test Score Hub */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#0f172a;background:#f8fafc;line-height:1.6}
h1,h2,h3,h4{font-family:'Poppins',system-ui,sans-serif;line-height:1.25;margin:0 0 .5em;color:#0b1b3a}
h1{font-size:clamp(1.75rem,4vw,2.5rem);font-weight:800}
h2{font-size:clamp(1.4rem,3vw,1.9rem);font-weight:700}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1em}
a{color:#0b6cf2;text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%;height:auto;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 1rem}

/* HEADER */
.site-header{position:sticky;top:0;z-index:50;background:#0b1b3a;color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;max-width:1120px;margin:0 auto;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;color:#fff;font-weight:800;font-size:1.15rem;font-family:'Poppins',sans-serif}
.brand-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#06b6d4,#f59e0b);display:grid;place-items:center;color:#0b1b3a;font-weight:900;font-size:1.1rem}
.nav-links{display:flex;gap:1.25rem;align-items:center;flex-wrap:wrap}
.nav-links a{color:#cbd5e1;font-weight:500;font-size:.95rem}
.nav-links a:hover,.nav-links a.active{color:#f59e0b;text-decoration:none}
.menu-btn{display:none;background:none;border:0;color:#fff;font-size:1.6rem;cursor:pointer}
@media(max-width:820px){
  .menu-btn{display:block}
  .nav-links{position:absolute;top:100%;left:0;right:0;background:#0b1b3a;flex-direction:column;align-items:flex-start;padding:1rem;gap:.75rem;display:none;border-top:1px solid #1e293b}
  .nav-links.open{display:flex}
}

/* HERO */
.hero{background:linear-gradient(135deg,#0b1b3a 0%,#0e2a5e 100%);color:#fff;padding:3.5rem 0 3rem;text-align:center}
.hero h1{color:#fff}
.hero p{color:#cbd5e1;max-width:680px;margin:0 auto 1.5rem;font-size:1.08rem}
.hero .badge{display:inline-block;background:rgba(245,158,11,.15);color:#fbbf24;padding:.35rem .9rem;border-radius:999px;font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin-bottom:1rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;background:#f59e0b;color:#0b1b3a;font-weight:700;padding:.8rem 1.4rem;border-radius:10px;border:0;cursor:pointer;font-size:1rem;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(245,158,11,.35);text-decoration:none}
.btn-outline{background:transparent;border:2px solid #06b6d4;color:#06b6d4}
.btn-row{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}

/* SECTIONS */
section{padding:3rem 0}
.section-title{text-align:center;margin-bottom:2rem}
.section-title p{color:#475569;max-width:640px;margin:.5rem auto 0}

/* TOOL GRID */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem}
.tool-card{background:#fff;border:1px solid #e2e8f0;border-radius:14px;padding:1.5rem;transition:transform .2s,box-shadow .2s,border-color .2s;display:flex;flex-direction:column}
.tool-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(11,27,58,.1);border-color:#06b6d4;text-decoration:none}
.tool-card .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#06b6d4,#0b6cf2);color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:1rem;font-size:1.1rem}
.tool-card h3{color:#0b1b3a;margin-bottom:.4rem}
.tool-card p{color:#64748b;font-size:.93rem;flex:1}
.tool-card .cta{color:#0b6cf2;font-weight:700;margin-top:.75rem;font-size:.9rem}

/* CALCULATOR */
.calc-page{padding:2.5rem 0}
.calc-wrap{display:grid;grid-template-columns:1fr;gap:2rem;max-width:780px;margin:0 auto}
.calc{background:#fff;border:1px solid #e2e8f0;border-radius:16px;overflow:hidden;box-shadow:0 4px 16px rgba(11,27,58,.06)}
.calc-head{background:#0b1b3a;color:#fff;padding:1.25rem 1.5rem}
.calc-head h2{color:#fff;margin:0 0 .25rem;font-size:1.25rem}
.calc-head p{margin:0;color:#94a3b8;font-size:.9rem}
.calc-body{padding:1.5rem;display:grid;gap:1rem}
.field{display:grid;gap:.4rem}
.field label{font-weight:600;font-size:.92rem;color:#0b1b3a}
.field-row{display:flex;gap:.75rem;align-items:center}
.field input,.field select{flex:1;padding:.65rem .8rem;border:2px solid #e2e8f0;border-radius:8px;font-size:1rem;font-family:inherit;background:#fff;transition:border-color .15s}
.field input:focus,.field select:focus{outline:0;border-color:#06b6d4}
.field-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem}
.result-chip{min-width:84px;text-align:center;background:#ecfeff;color:#0b6cf2;font-weight:700;padding:.6rem .8rem;border-radius:8px;border:1px solid #cffafe}
.result-box{margin-top:.5rem;background:linear-gradient(135deg,#0b1b3a,#0e2a5e);color:#fff;padding:1.25rem 1.5rem;border-radius:12px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem}
.result-box .label{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:#94a3b8;font-weight:600}
.result-box .value{font-size:1.8rem;font-weight:800;font-family:'Poppins',sans-serif;margin-top:.15rem}
.result-box .note{font-size:.88rem;color:#cbd5e1;margin-top:.35rem;max-width:380px}
.btn-reset{background:rgba(255,255,255,.15);color:#fff;font-weight:600;padding:.5rem 1rem;border-radius:8px;border:0;cursor:pointer;font-size:.9rem}
.btn-reset:hover{background:rgba(255,255,255,.25)}

/* CONTENT */
.prose{max-width:780px;margin:0 auto}
.prose h2{margin-top:2rem}
.prose ul{padding-left:1.25rem;color:#334155}
.prose li{margin:.3rem 0}
.prose table{width:100%;border-collapse:collapse;margin:1rem 0;background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.prose th,.prose td{padding:.65rem .85rem;text-align:left;border-bottom:1px solid #e2e8f0;font-size:.93rem}
.prose th{background:#f1f5f9;font-weight:700;color:#0b1b3a}
.prose tr:last-child td{border-bottom:0}

/* FAQ */
details.faq{background:#fff;border:1px solid #e2e8f0;border-radius:10px;padding:1rem 1.2rem;margin:.6rem 0}
details.faq summary{cursor:pointer;font-weight:700;color:#0b1b3a;list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:'+';float:right;color:#06b6d4;font-weight:800}
details.faq[open] summary::after{content:'−'}
details.faq p{margin:.6rem 0 0;color:#475569}

/* FOOTER */
.site-footer{background:#0b1b3a;color:#cbd5e1;padding:3rem 0 1rem;margin-top:3rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:2rem;padding:0 1rem;max-width:1120px;margin:0 auto}
.footer-grid h4{color:#fff;font-size:1rem;margin-bottom:.6rem}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin:.3rem 0}
.footer-grid a{color:#cbd5e1;font-size:.92rem}
.footer-grid a:hover{color:#f59e0b}
.footer-bottom{border-top:1px solid #1e293b;margin-top:2rem;padding:1rem;text-align:center;font-size:.85rem;color:#94a3b8}

/* UTILS */
.text-center{text-align:center}
.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mb-2{margin-bottom:1rem}
.muted{color:#64748b}