/* ===== Top Up Robux — tema HITAM ELEGAN TEKNOLOGI (mobile-first) ===== */
:root{
  --biru:#22d3ee; --biru-tua:#06b6d4; --hijau:#34d399;
  --teks:#e7eaf0; --abu:#8b93a7; --bg:#0a0e17; --card:#11162500;
  --card-solid:#121a2e; --border:#1f2a44; --merah:#f87171; --kuning:#fbbf24;
  --radius:14px; --shadow:0 8px 26px rgba(0,0,0,.45);
  --glow:0 0 0 1px rgba(34,211,238,.25), 0 8px 30px rgba(34,211,238,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--teks);line-height:1.6;font-size:16px;
  background-image:radial-gradient(900px 500px at 85% -10%,rgba(34,211,238,.09),transparent 60%),radial-gradient(700px 400px at -10% 20%,rgba(99,102,241,.08),transparent 55%)}
.container{max-width:1000px;margin:0 auto;padding:0 16px}
a{color:var(--biru);text-decoration:none}
a:hover{color:var(--biru-tua)}
img{max-width:100%;display:block}

/* Navbar */
.navbar{background:rgba(13,18,32,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.nav-inner{display:flex;justify-content:space-between;align-items:center;padding:12px 16px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.2rem;color:var(--teks)}
.brand-icon{font-size:1.5rem;filter:drop-shadow(0 0 8px rgba(34,211,238,.6))}
.brand-logo{max-height:34px;width:auto}
.nav-links{display:flex;gap:18px}
.nav-links a{color:var(--abu);font-weight:600;font-size:.95rem;transition:.15s}
.nav-links a:hover{color:var(--biru)}

/* Hero */
.hero{background:linear-gradient(135deg,#0b1220,#101a33 55%,#0b1220);color:#fff;text-align:center;padding:56px 20px;border-radius:0 0 var(--radius) var(--radius);position:relative;overflow:hidden;border-bottom:1px solid var(--border)}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 50% 0%,rgba(34,211,238,.18),transparent 65%);pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(34,211,238,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.05) 1px,transparent 1px);background-size:36px 36px;opacity:.5;pointer-events:none}
.hero h1{font-size:2.1rem;font-weight:800;margin-bottom:10px;background:linear-gradient(90deg,#7dd3fc,#22d3ee,#a5b4fc);-webkit-background-clip:text;background-clip:text;color:transparent;position:relative}
.hero p{font-size:1.05rem;color:#aeb6c9;max-width:560px;margin:0 auto 22px;position:relative}
.btn{display:inline-block;background:linear-gradient(135deg,var(--biru),var(--biru-tua));color:#06121a;font-weight:800;padding:13px 26px;border-radius:var(--radius);border:none;cursor:pointer;font-size:1rem;transition:.15s;text-align:center;box-shadow:0 8px 22px rgba(34,211,238,.3)}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(34,211,238,.45)}
.btn-light{background:#e7eaf0;color:#0a0e17}
.btn-light:hover{background:#fff}
.btn-hijau{background:linear-gradient(135deg,var(--hijau),#10b981);color:#06130c}
.btn-hijau:hover{filter:brightness(1.08)}
.btn-outline{background:transparent;border:2px solid var(--biru);color:var(--biru);box-shadow:none}
.btn-outline:hover{background:rgba(34,211,238,.1)}
.btn-block{display:block;width:100%}
.btn-sm{padding:8px 16px;font-size:.9rem}

/* Card */
.card{background:var(--card-solid);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:18px;border:1px solid var(--border)}

/* Produk grid */
.grid{display:grid;gap:14px}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(min-width:640px){.grid-2{grid-template-columns:repeat(3,1fr)}}
@media(min-width:900px){.grid-2{grid-template-columns:repeat(5,1fr)}}
.produk{background:linear-gradient(160deg,#141b31,#0e1526);border:1.5px solid var(--border);border-radius:var(--radius);padding:18px 14px;text-align:center;cursor:pointer;position:relative;transition:.18s}
.produk:hover{border-color:var(--biru);transform:translateY(-3px);box-shadow:var(--glow)}
.produk.dipilih{border-color:var(--biru);background:linear-gradient(160deg,#152238,#0e1526);box-shadow:var(--glow)}
.produk.habis{opacity:.45;cursor:not-allowed}
.produk-badge{position:absolute;top:-10px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--kuning),#f59e0b);color:#3a2703;font-size:.68rem;font-weight:800;padding:3px 10px;border-radius:999px;white-space:nowrap}
.produk-nama{font-weight:800;font-size:1.05rem;margin:6px 0 2px;color:var(--teks)}
.produk-harga{color:var(--biru);font-weight:800;font-size:1rem}
.produk-coret{color:var(--abu);text-decoration:line-through;font-size:.82rem}
.produk-stok{font-size:.75rem;margin-top:4px;color:var(--abu)}

/* Form */
label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px;color:var(--teks)}
input,select,textarea{width:100%;padding:12px;border:1.5px solid var(--border);border-radius:10px;font-size:1rem;font-family:inherit;background:#0d1424;color:var(--teks)}
input::placeholder,textarea::placeholder{color:#5b6478}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--biru);box-shadow:0 0 0 3px rgba(34,211,238,.15)}
.form-group{margin-bottom:16px}
.form-hint{font-size:.82rem;color:var(--abu);margin-top:4px}
.checkbox-row{display:flex;gap:10px;align-items:flex-start}
.checkbox-row input{width:auto;margin-top:4px}

/* Alert */
.alert{padding:13px 16px;border-radius:10px;margin-bottom:16px;font-size:.95rem;border:1px solid}
.alert-sukses{background:rgba(52,211,153,.12);color:#6ee7b7;border-color:rgba(52,211,153,.4)}
.alert-error{background:rgba(248,113,113,.12);color:#fca5a5;border-color:rgba(248,113,113,.4)}
.alert-info{background:rgba(34,211,238,.12);color:#67e8f9;border-color:rgba(34,211,238,.4)}
.alert-warning{background:rgba(251,191,36,.12);color:#fcd34d;border-color:rgba(251,191,36,.4)}

/* Summary */
.summary-row{display:flex;justify-content:space-between;padding:8px 0;font-size:.98rem}
.summary-row.total{border-top:2px solid var(--border);margin-top:8px;padding-top:12px;font-weight:800;font-size:1.15rem;color:var(--biru)}
.summary-row .diskon{color:var(--hijau);font-weight:700}

/* Badge status */
.badge{display:inline-block;padding:4px 12px;border-radius:999px;font-size:.78rem;font-weight:700}
.badge-pending{background:rgba(251,191,36,.15);color:#fcd34d}
.badge-paid,.badge-processing{background:rgba(96,165,250,.15);color:#93c5fd}
.badge-completed{background:rgba(52,211,153,.15);color:#6ee7b7}
.badge-failed,.badge-cancelled{background:rgba(248,113,113,.15);color:#fca5a5}
.badge-refunded{background:#26304b;color:#9aa3b8}

/* Section */
.section{padding:36px 0}
.section-title{font-size:1.5rem;font-weight:800;text-align:center;margin-bottom:6px;color:var(--teks)}
.section-sub{text-align:center;color:var(--abu);margin-bottom:26px}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border);padding:14px 0}
.faq-q{font-weight:700;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--teks)}
.faq-a{display:none;padding-top:8px;color:var(--abu)}
.faq-item.buka .faq-a{display:block}

/* Steps */
.steps{display:grid;gap:14px;grid-template-columns:repeat(2,1fr)}
@media(min-width:760px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{text-align:center;padding:18px 10px}
.step-icon{font-size:2rem;margin-bottom:8px;filter:drop-shadow(0 0 10px rgba(34,211,238,.4))}
.step-title{font-weight:700;font-size:.95rem;color:var(--teks)}
.step-desc{font-size:.82rem;color:var(--abu)}

/* Footer */
.footer{background:#0a0f1c;color:#9aa3b8;text-align:center;padding:30px 16px;margin-top:40px;border-top:1px solid var(--border)}
.footer a{color:var(--biru)}
.footer-small{font-size:.85rem;opacity:.75;margin-top:6px}

/* Tabel */
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}
th{background:#0e1526;font-weight:700;color:var(--abu)}
td{color:var(--teks)}
.table-wrap{overflow-x:auto}

/* Util */
.text-center{text-align:center}
.mt-2{margin-top:12px}.mt-3{margin-top:20px}.mt-4{margin-top:28px}
.mb-2{margin-bottom:12px}.mb-3{margin-bottom:20px}
.text-muted{color:var(--abu)}
.fw-bold{font-weight:700}
.d-flex{display:flex;gap:10px;flex-wrap:wrap}
.justify-between{justify-content:space-between}
.align-center{align-items:center}
.warning-box{background:rgba(251,191,36,.12);border:1px solid rgba(251,191,36,.4);border-radius:10px;padding:14px 16px;font-size:.9rem;color:#fcd34d}