/* ============================
   ARD Technology
   Modern tech startup — dark mode, gradients, glassmorphism
   ============================ */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --font:'Space Grotesk',system-ui,sans-serif;
  --mono:'JetBrains Mono','Consolas',monospace;
  --bg:#0a0e1a;
  --bg-card:#111827;
  --bg-glass:rgba(17,24,39,.65);
  --surface:#1a2035;
  --border:rgba(255,255,255,.08);
  --border-glow:rgba(99,102,241,.3);
  --text:#e2e8f0;
  --text-dim:#8b95a8;
  --white:#fff;
  --purple:#7c3aed;
  --indigo:#6366f1;
  --cyan:#06b6d4;
  --green:#10b981;
  --gradient:linear-gradient(135deg,#6366f1 0%,#7c3aed 50%,#06b6d4 100%);
  --gradient-text:linear-gradient(135deg,#6366f1,#06b6d4);
  --max:1120px;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 4px 24px rgba(0,0,0,.3);
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.65}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---- Glassmorphism Nav ---- */
.site-nav{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:200;width:calc(100% - 48px);max-width:var(--max)}
.nav-glass{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:16px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:60px}
.nav-brand{font-weight:700;font-size:1.15rem;color:var(--white)}
.nav-brand span{background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:.85rem;font-weight:500;color:var(--text-dim);transition:color .25s}
.nav-links a:hover,.nav-links a.active{color:var(--white)}
.nav-links .nav-cta{background:var(--gradient);color:var(--white);padding:8px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:.82rem;transition:opacity .25s}
.nav-links .nav-cta:hover{opacity:.85}

.mob-btn{display:none;background:none;border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;padding:8px 10px;color:var(--text)}
.mob-btn svg{display:block}
@media(max-width:768px){
  .mob-btn{display:block}
  .nav-links{display:none;flex-direction:column;position:absolute;top:68px;left:0;right:0;background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius);padding:20px;gap:14px}
  .nav-links.open{display:flex}
  .nav-glass{padding:0 16px}
}

/* ---- Hero ---- */
.hero{padding:160px 0 100px;position:relative;overflow:hidden;text-align:center}
.hero::before{content:'';position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:800px;height:800px;background:radial-gradient(circle,rgba(99,102,241,.15) 0%,transparent 70%);pointer-events:none}
.hero-badge{display:inline-block;background:rgba(99,102,241,.12);border:1px solid rgba(99,102,241,.25);color:var(--indigo);font-size:.78rem;font-weight:600;padding:6px 18px;border-radius:20px;margin-bottom:24px;letter-spacing:.04em}
.hero h1{font-size:3.4rem;font-weight:700;line-height:1.12;max-width:700px;margin:0 auto 22px;color:var(--white)}
.hero h1 .grad{background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.1rem;color:var(--text-dim);max-width:560px;margin:0 auto 36px}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-glow{display:inline-flex;align-items:center;gap:8px;background:var(--gradient);color:var(--white);font-weight:600;font-size:.9rem;padding:14px 32px;border-radius:var(--radius-sm);transition:box-shadow .3s;border:none;cursor:pointer}
.btn-glow:hover{box-shadow:0 0 30px rgba(99,102,241,.4)}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);color:var(--text);font-weight:500;font-size:.9rem;padding:13px 28px;border-radius:var(--radius-sm);transition:border-color .3s,color .3s}
.btn-ghost:hover{border-color:var(--indigo);color:var(--white)}

/* ---- Terminal hero block ---- */
.terminal{max-width:600px;margin:50px auto 0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;text-align:left;box-shadow:var(--shadow)}
.terminal-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;background:rgba(255,255,255,.03);border-bottom:1px solid var(--border)}
.terminal-dot{width:11px;height:11px;border-radius:50%}
.terminal-dot.r{background:#ef4444}.terminal-dot.y{background:#eab308}.terminal-dot.g{background:#22c55e}
.terminal-body{padding:18px 20px;font-family:var(--mono);font-size:.82rem;line-height:1.85;color:var(--text-dim)}
.terminal-body .prompt{color:var(--green)}
.terminal-body .cmd{color:var(--white)}
.terminal-body .out{color:var(--cyan)}
.terminal-body .cursor{display:inline-block;width:8px;height:16px;background:var(--indigo);animation:blink 1s step-end infinite;vertical-align:middle;margin-left:4px}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}

/* ---- Page banner (inner pages) ---- */
.page-banner{padding:140px 0 60px;text-align:center;position:relative}
.page-banner::before{content:'';position:absolute;top:-100px;left:50%;transform:translateX(-50%);width:600px;height:600px;background:radial-gradient(circle,rgba(99,102,241,.1) 0%,transparent 70%);pointer-events:none}
.page-banner .container{position:relative;z-index:1}
.page-banner h1{font-size:2.6rem;font-weight:700;color:var(--white);margin-bottom:12px}
.page-banner p{color:var(--text-dim);max-width:520px;margin:0 auto}

/* ---- Sections ---- */
.sec{padding:80px 0;position:relative}
.sec-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.16em;color:var(--indigo);font-weight:600;margin-bottom:6px}
.sec h2{font-size:2rem;font-weight:700;color:var(--white);margin-bottom:16px}
.sec h3{font-size:1.2rem;font-weight:600;color:var(--white);margin-bottom:8px}
.sec p{color:var(--text-dim);max-width:600px}
.sec p+p{margin-top:12px}

/* ---- Grids ---- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:768px){
  .grid-2,.grid-3{grid-template-columns:1fr}
}

/* ---- Glass cards ---- */
.glass-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:border-color .3s,transform .3s}
.glass-card:hover{border-color:var(--border-glow);transform:translateY(-4px)}
.glass-card .card-icon{width:48px;height:48px;background:rgba(99,102,241,.12);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;margin-bottom:18px;font-size:1.3rem}
.glass-card h3{font-size:1.1rem;font-weight:600;color:var(--white);margin-bottom:8px}
.glass-card p{font-size:.88rem;color:var(--text-dim)}
.glass-card .tag-row{display:flex;gap:6px;flex-wrap:wrap;margin-top:14px}
.glass-card .tag{font-size:.7rem;font-weight:500;padding:4px 10px;border-radius:4px;background:rgba(99,102,241,.1);color:var(--indigo);border:1px solid rgba(99,102,241,.2)}

/* ---- Stats ---- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:32px}
.stat-box{text-align:center;padding:28px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius)}
.stat-box strong{display:block;font-size:2.2rem;font-weight:700;background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-box span{font-size:.78rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em}
@media(max-width:640px){
  .stat-grid{grid-template-columns:1fr 1fr}
}

/* ---- Tech stack pills ---- */
.tech-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.tech-pill{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:8px 16px;font-size:.8rem;font-weight:500;color:var(--text);transition:border-color .2s}
.tech-pill:hover{border-color:var(--indigo)}

/* ---- Case study cards ---- */
.case-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color .3s,transform .3s}
.case-card:hover{border-color:var(--border-glow);transform:translateY(-3px)}
.case-top{padding:24px 28px;border-bottom:1px solid var(--border)}
.case-top .case-badge{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--cyan);margin-bottom:8px}
.case-top h3{font-size:1.15rem;color:var(--white);margin-bottom:6px}
.case-top p{font-size:.86rem;color:var(--text-dim)}
.case-bottom{padding:18px 28px;display:flex;gap:24px;flex-wrap:wrap}
.case-metric strong{display:block;font-size:1.4rem;font-weight:700;color:var(--white)}
.case-metric span{font-size:.72rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em}
.case-tags{display:flex;gap:6px;flex-wrap:wrap;padding:0 28px 20px}
.case-tags .tag{font-size:.68rem;padding:3px 9px;border-radius:4px;background:rgba(6,182,212,.08);color:var(--cyan);border:1px solid rgba(6,182,212,.2)}

/* ---- CTA section ---- */
.cta-sec{padding:80px 0;text-align:center;position:relative}
.cta-sec::before{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:600px;height:400px;background:radial-gradient(circle,rgba(124,58,237,.12) 0%,transparent 70%);pointer-events:none}
.cta-sec .container{position:relative;z-index:1}
.cta-sec h2{font-size:2.2rem;font-weight:700;color:var(--white);margin-bottom:14px}
.cta-sec p{color:var(--text-dim);max-width:480px;margin:0 auto 28px}

/* ---- Contact form ---- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-full{grid-column:span 2}
label{display:block;font-size:.78rem;font-weight:500;color:var(--text-dim);margin-bottom:6px;letter-spacing:.04em}
input,select,textarea{width:100%;padding:12px 16px;font-size:.9rem;font-family:var(--font);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);transition:border-color .25s;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--indigo)}
input::placeholder,textarea::placeholder{color:var(--text-dim)}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b95a8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
select option{background:var(--bg-card);color:var(--text)}
textarea{resize:vertical;min-height:120px}
@media(max-width:640px){
  .form-grid{grid-template-columns:1fr}
  .form-full{grid-column:span 1}
}

/* ---- Footer ---- */
.site-footer{border-top:1px solid var(--border);padding:48px 0 30px}
.ft-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
.ft-brand{font-weight:700;font-size:1.2rem;color:var(--white);margin-bottom:10px}
.ft-brand span{background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.ft-grid p{font-size:.84rem;color:var(--text-dim)}
.ft-grid h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:var(--white);margin-bottom:14px;font-weight:600}
.ft-grid a{display:block;font-size:.84rem;color:var(--text-dim);margin-bottom:8px;transition:color .2s}
.ft-grid a:hover{color:var(--white)}
.ft-bottom{border-top:1px solid var(--border);margin-top:32px;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.ft-bottom span{font-size:.76rem;color:var(--text-dim)}
.ft-newsletter{display:flex;gap:8px;margin-top:14px}
.ft-newsletter input{flex:1;padding:10px 14px;font-size:.84rem;font-family:var(--font);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none}
.ft-newsletter button{background:var(--gradient);color:#fff;border:none;padding:10px 18px;border-radius:var(--radius-sm);font-weight:600;font-size:.8rem;cursor:pointer;font-family:var(--font)}
@media(max-width:640px){
  .ft-grid{grid-template-columns:1fr}
}

/* ---- Architecture diagram ---- */
.arch-diagram{margin-top:28px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;font-family:var(--mono);font-size:.78rem;color:var(--text-dim);line-height:2;text-align:center;overflow-x:auto;white-space:pre}

/* ---- Animations ---- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}