/* ==========================================================================
   Austin Music — Website mời bot
   Thiết kế tham khảo phong cách Vercel: nền đen sâu, viền hairline,
   lưới nền tinh tế, glow tối giản, bo góc vừa phải thay vì pill.
   ========================================================================== */

:root{
  --bg:            #000000;
  --bg-elev:       #0a0a0a;
  --bg-elev-2:     #111113;
  --line:          rgba(255,255,255,.14);
  --line-soft:     rgba(255,255,255,.09);
  --line-strong:   rgba(255,255,255,.28);
  --iris:          #6E56F8;
  --iris-soft:     rgba(110,86,248,.14);
  --mint:          #00E5A0;
  --mint-soft:     rgba(0,229,160,.12);
  --text:          #F2F2F3;
  --muted:         #9a9aa3;
  --faint:         #6b6b74;
  --radius-lg:     16px;
  --radius-md:     12px;
  --radius-sm:     8px;
  --container:     1120px;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'Inter', sans-serif;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
img{display:block; max-width:100%;}
a{color:inherit; text-decoration:none;}
ul{list-style:none;}

/* Nền lưới tinh tế kiểu Vercel, phai dần theo chiều dọc */
body{
  background-image:
    linear-gradient(var(--bg) 0%, transparent 12%, transparent 88%, var(--bg) 100%),
    linear-gradient(to right, rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:100% 100%, 64px 64px, 64px 64px;
  background-position:0 0, center top, center top;
}
@media (max-width:720px){
  body{ background-image:
    linear-gradient(var(--bg) 0%, transparent 12%, transparent 88%, var(--bg) 100%),
    linear-gradient(to right, rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.04) 1px, transparent 1px);
    background-size:100% 100%, 44px 44px, 44px 44px;
  }
}

.legal-content{max-width:720px;}
.legal-content h1{font-size:32px; margin-bottom:8px;}
.legal-content .updated{color:var(--faint); font-size:13px; margin-bottom:40px;}
.legal-content h2{font-size:19px; margin:36px 0 12px; font-family:'Space Grotesk', sans-serif;}
.legal-content p{color:var(--muted); font-size:14.5px; line-height:1.75; margin-bottom:12px;}
.legal-content ul{margin:0 0 12px 0;}
.legal-content li{color:var(--muted); font-size:14.5px; line-height:1.75; padding-left:18px; position:relative; margin-bottom:8px;}
.legal-content li::before{content:"—"; position:absolute; left:0; color:var(--faint);}
.legal-content a{color:var(--iris); text-decoration:underline; text-underline-offset:2px;}
.legal-content strong{color:var(--text); font-weight:600;}

.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
  position:relative;
}
@media (max-width:480px){ .wrap{padding:0 20px;} }

section{padding:96px 0;}
@media (max-width:720px){ section{padding:64px 0;} }
@media (max-width:480px){ section{padding:48px 0;} }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12px; font-weight:600; letter-spacing:.4px;
  color:var(--muted);
  padding:5px 12px 5px 10px;
  border:1px solid var(--line-soft);
  border-radius:100px;
  background:rgba(255,255,255,.02);
}
.eyebrow .num{color:var(--mint); font-family:'JetBrains Mono'; font-weight:600;}
.eyebrow::before{
  content:''; width:6px; height:6px; border-radius:50%;
  background:var(--mint); box-shadow:0 0 8px var(--mint);
  flex-shrink:0;
}

h1,h2,h3{font-family:'Space Grotesk', sans-serif; font-weight:700; letter-spacing:-.02em;}

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding:12px 22px; border-radius:var(--radius-sm);
  font-size:14.5px; font-weight:600;
  cursor:pointer; border:1px solid transparent;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease, opacity .15s ease;
}
.btn svg{width:17px; height:17px;}
.btn-primary{
  background:#fff;
  color:#000;
  box-shadow:0 0 0 1px rgba(255,255,255,.06);
}
.btn-primary:hover{transform:translateY(-1px); opacity:.88;}
.btn-outline{
  background:rgba(255,255,255,.02); border-color:var(--line); color:var(--text);
}
.btn-outline:hover{border-color:var(--line-strong); background:rgba(255,255,255,.05);}
.btn-sm{padding:9px 16px; font-size:13px;}

/* ---------------- Header ---------------- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(0,0,0,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}
.nav-brand{display:flex; align-items:center;}
.nav-brand img.brand-logo{height:30px; width:auto;}
.nav-links{display:flex; align-items:center; gap:30px;}
.nav-links a{font-size:13.5px; color:var(--muted); font-weight:500; transition:color .15s;}
.nav-links a:hover{color:var(--text);}
.nav-cta{display:flex; align-items:center; gap:12px;}

@media (max-width:860px){
  .nav-links{display:none;}
}

/* Hamburger button (mobile only) */
.nav-burger{
  display:none;
  flex-direction:column; justify-content:center; align-items:center; gap:5px;
  width:38px; height:38px; border-radius:var(--radius-sm);
  background:transparent; border:1px solid var(--line-soft);
  cursor:pointer; flex-shrink:0;
}
.nav-burger span{
  display:block; width:17px; height:2px; background:var(--text); border-radius:2px;
  transition:transform .25s ease, opacity .2s ease;
}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* Mobile nav drawer */
.nav-mobile{
  display:none;
  flex-direction:column;
  max-height:0; overflow:hidden;
  border-top:1px solid transparent;
  background:var(--bg-elev);
  transition:max-height .3s ease, border-color .3s ease;
}
.nav-mobile.open{
  max-height:420px;
  border-top:1px solid var(--line-soft);
}
.nav-mobile a{
  padding:15px 28px; font-size:14.5px; color:var(--muted); font-weight:500;
  border-bottom:1px solid var(--line-soft);
}
.nav-mobile a:hover{color:var(--text);}
.nav-mobile-cta{display:flex; gap:10px; padding:16px 28px;}
.nav-mobile-cta .btn{flex:1;}

@media (max-width:640px){
  .nav-cta{display:none;}
  .nav-burger{display:flex;}
  .nav-mobile{display:flex;}
  .nav{padding-left:20px; padding-right:20px;}
}

/* ---------------- Hero ---------------- */
.hero{
  position:relative;
  padding:90px 0 60px;
  overflow:hidden;
}
.hero::before{
  content:'';
  position:absolute; top:-160px; left:50%; transform:translateX(-50%);
  width:820px; height:420px;
  background:radial-gradient(ellipse at center, rgba(110,86,248,.20), transparent 70%);
  pointer-events:none; z-index:0;
}
.hero-grid{
  display:grid; grid-template-columns:1fr 460px; align-items:center; gap:40px;
  position:relative; z-index:1;
}
.hero-art{
  position:relative; justify-self:center;
}
.hero-art img{width:440px; max-width:100%;}

.hero h1{
  font-size:56px; line-height:1.04; margin:18px 0 20px;
}
.hero h1 .accent{
  background:linear-gradient(135deg, var(--iris), var(--mint));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p.lead{
  color:var(--muted); font-size:16.5px; max-width:480px; margin-bottom:32px;
}
.hero-cta{display:flex; gap:14px; margin-bottom:44px; flex-wrap:wrap;}

.hero-stats{display:flex; align-items:center; gap:20px; flex-wrap:wrap;}
.hstat val{display:block;}
.hstat .v{font-family:'JetBrains Mono'; font-size:23px; font-weight:600;}
.hstat .l{font-size:12.5px; color:var(--faint); margin-top:2px;}

.trust-badge{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12px; color:var(--muted); font-weight:500;
  padding:7px 13px; border-radius:100px;
  border:1px solid var(--line-soft); background:rgba(255,255,255,.02);
}
.trust-badge svg{width:14px; height:14px; flex-shrink:0;}
.trust-badge .dot-ok{
  width:6px; height:6px; border-radius:50%; background:var(--mint);
  box-shadow:0 0 6px var(--mint); flex-shrink:0;
}

@media (max-width:940px){
  .hero-grid{grid-template-columns:1fr;}
  .hero-art{order:-1;}
  .hero-art img{width:280px;}
  .hero h1{font-size:40px;}
}

@media (max-width:480px){
  .hero{padding:56px 0 44px;}
  .hero-art img{width:220px;}
  .hero h1{font-size:32px;}
  .hero p.lead{font-size:15px;}
  .hero-cta{flex-direction:column; align-items:stretch;}
  .hero-cta .btn{width:100%;}
  .hero-stats{gap:14px;}
}

/* ---------------- Section heading pattern ---------------- */
.sec-head{max-width:620px; margin-bottom:52px;}
.sec-head h2{font-size:34px; margin-top:14px;}
.sec-head p{color:var(--muted); font-size:15px; margin-top:12px;}
@media (max-width:480px){
  .sec-head{margin-bottom:36px;}
  .sec-head h2{font-size:26px;}
}

/* ---------------- Features ---------------- */
.feature-grid{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(228px, 1fr)); gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  overflow:hidden;
}

.feature-card{
  background:var(--bg-elev);
  padding:28px 26px;
  transition:background .18s ease;
  position:relative;
}
.feature-card:hover{background:var(--bg-elev-2);}
.feature-card::before{
  content:''; position:absolute; top:0; left:0; right:0; height:1px;
  background:linear-gradient(90deg, transparent, var(--iris), transparent);
  opacity:0; transition:opacity .2s ease;
}
.feature-card:hover::before{opacity:.7;}
.feature-card .icon-holder{
  width:44px; height:44px; border-radius:var(--radius-sm);
  background:var(--bg-elev-2); border:1px solid var(--line-soft);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:20px;
}
.feature-card.security .icon-holder{border-color:rgba(0,229,160,.3);}
.feature-card h3{font-size:16px; margin-bottom:8px;}
.feature-card p{font-size:13.5px; color:var(--muted); line-height:1.6;}

/* ---------------- Steps (bắt đầu) ---------------- */
.steps{display:grid; grid-template-columns:repeat(3,1fr); gap:0; position:relative;}
@media (max-width:860px){ .steps{grid-template-columns:1fr; gap:28px;} }

.step{position:relative; padding:0 22px;}
.step:first-child{padding-left:0;}
.step:last-child{padding-right:0;}
.step + .step::before{
  content:''; position:absolute; left:0; top:22px; bottom:22px; width:1px; background:var(--line);
}
@media (max-width:860px){ .step + .step::before{display:none;} }

.step .step-num{
  font-family:'JetBrains Mono'; font-size:13px; color:var(--mint);
  border:1px solid var(--line); width:34px; height:34px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; margin-bottom:18px;
}
.step h3{font-size:17px; margin-bottom:8px;}
.step p{font-size:13.5px; color:var(--muted); line-height:1.65;}
.step code{
  display:inline-block; margin-top:12px; font-family:'JetBrains Mono'; font-size:12.5px;
  background:var(--bg-elev-2); border:1px solid var(--line-soft); color:var(--mint);
  padding:6px 10px; border-radius:var(--radius-sm);
}

/* ---------------- Commands table ---------------- */
.cmd-panel{
  background:var(--bg-elev);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.cmd-row{
  display:grid; grid-template-columns:200px 1fr 120px;
  align-items:center; gap:18px;
  padding:17px 26px;
  border-bottom:1px solid var(--line-soft);
  transition:background .15s ease;
}
.cmd-row:hover{background:var(--bg-elev-2);}
.cmd-row:last-child{border-bottom:none;}
.cmd-row .cmd{
  font-family:'JetBrains Mono'; font-size:13.5px; color:var(--mint); font-weight:600;
}
.cmd-row .desc{font-size:13.5px; color:var(--muted);}
.cmd-row .cat{
  font-size:11px; color:var(--faint); text-align:right; text-transform:uppercase; letter-spacing:1px;
}
.cmd-head{
  display:grid; grid-template-columns:200px 1fr 120px; gap:18px;
  padding:14px 26px; background:var(--bg-elev-2);
  font-size:11px; letter-spacing:1.4px; text-transform:uppercase; color:var(--faint);
}
@media (max-width:640px){
  .cmd-head{display:none;}
  .cmd-row{grid-template-columns:1fr; gap:6px; padding:18px 22px;}
  .cmd-row > span{position:relative; padding-left:0;}
  .cmd-row > span::before{
    content:attr(data-label);
    display:block;
    font-size:10.5px; font-weight:600; letter-spacing:1px; text-transform:uppercase;
    color:var(--faint); margin-bottom:3px;
  }
  .cmd-row .cat{text-align:left;}
}

/* ---------------- CTA band ---------------- */
.cta-band{
  position:relative; overflow:hidden;
  background:var(--bg-elev);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  padding:56px 48px;
  display:flex; align-items:center; justify-content:space-between; gap:30px; flex-wrap:wrap;
}
.cta-band::before{
  content:'';
  position:absolute; top:-140px; right:-100px;
  width:420px; height:420px;
  background:radial-gradient(ellipse at center, rgba(110,86,248,.22), transparent 70%);
  pointer-events:none;
}
.cta-band > *{position:relative; z-index:1;}
.cta-band h2{font-size:28px; margin-bottom:8px;}
.cta-band p{color:var(--muted); font-size:14.5px;}

@media (max-width:560px){
  .cta-band{padding:36px 26px; text-align:center; justify-content:center;}
  .cta-band > div{width:100%;}
  .cta-band .btn{width:100%;}
}

/* ---------------- Bug report form ---------------- */
.bug-form{display:flex; flex-direction:column; gap:20px;}
.hp-field{position:absolute; left:-9999px; top:-9999px; opacity:0; pointer-events:none;}
.form-field{display:flex; flex-direction:column; gap:8px;}
.form-field label{font-size:13.5px; font-weight:600; color:var(--text);}
.form-field label .req{color:var(--mint);}
.form-field input,
.form-field textarea{
  background:var(--bg-elev); border:1px solid var(--line-soft); color:var(--text);
  border-radius:var(--radius-sm); padding:11px 14px; font-size:14px; font-family:'Inter', sans-serif;
  resize:vertical; transition:border-color .15s ease, background .15s ease;
}
.form-field input::placeholder,
.form-field textarea::placeholder{color:var(--faint);}
.form-field input:focus,
.form-field textarea:focus{
  outline:none; border-color:var(--iris); background:var(--bg-elev-2);
}
.form-status{font-size:13.5px; min-height:18px; margin-top:2px;}
.form-status.success{color:var(--mint);}
.form-status.error{color:#ff6b6b;}
.btn:disabled{opacity:.55; cursor:not-allowed; transform:none;}

/* ---------------- Footer ---------------- */
footer{border-top:1px solid var(--line-soft); padding:44px 0 30px;}
.footer-top{display:flex; justify-content:space-between; align-items:flex-start; gap:30px; flex-wrap:wrap; margin-bottom:34px;}
.footer-brand{display:flex; align-items:center;}
.footer-brand img.brand-logo{height:24px; width:auto;}
.footer-links{display:flex; gap:44px; flex-wrap:wrap;}
.footer-col h4{font-size:12px; letter-spacing:1.2px; text-transform:uppercase; color:var(--faint); margin-bottom:12px;}
.footer-col a{display:block; font-size:13.5px; color:var(--muted); margin-bottom:9px; transition:color .15s;}
.footer-col a:hover{color:var(--text);}
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px;
  padding-top:24px; border-top:1px solid var(--line-soft);
  font-size:12.5px; color:var(--faint);
}
.social-row{display:flex; gap:10px;}
.social-row a{
  width:34px; height:34px; border-radius:var(--radius-sm); border:1px solid var(--line-soft);
  display:flex; align-items:center; justify-content:center; color:var(--muted);
  transition:color .15s, border-color .15s;
}
.social-row a:hover{color:var(--iris); border-color:var(--iris);}

@media (max-width:640px){
  .footer-links{gap:28px 36px;}
}
@media (max-width:480px){
  footer{padding:36px 0 24px;}
  .footer-links{width:100%; gap:26px 32px;}
  .footer-bottom{flex-direction:column; align-items:flex-start; text-align:left;}
}