/* =====================================================
   99Billion — Design System (AI x Art)  | Local only
   โครงสร้าง: 1) ตัวแปร 2) พื้นฐาน 3) คอมโพเนนต์ร่วม
             4) DESKTOP (>=900px)  5) MOBILE (<900px)
   ===================================================== */

/* ---------- 1) ตัวแปรสี ---------- */
:root{
  --bg:#050b1f; --bg2:#0a1330; --ink:#eaf0ff; --muted:#9fb0d6;
  --blue:#3b82f6; --cyan:#22d3ee; --violet:#8b5cf6; --gold:#fbbf24; --gold2:#f59e0b;
  --glass:rgba(255,255,255,.06); --line:rgba(255,255,255,.12);
  --radius:22px; --ease:cubic-bezier(.2,.8,.2,1);
}

/* ---------- 2) พื้นฐาน ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Kanit',sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul{list-style:none}
svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.wrap{width:min(1200px,100% - 48px);margin-inline:auto}
em{font-style:normal;background:linear-gradient(100deg,var(--cyan),var(--blue) 45%,var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}

/* พื้นหลัง Aurora + ตารางเทค */
.bg-aurora{position:fixed;inset:0;z-index:-2;overflow:hidden;background:radial-gradient(120% 80% at 50% 0%,#0c1a4a 0%,var(--bg) 60%)}
.bg-aurora i{position:absolute;width:55vmax;height:55vmax;border-radius:50%;filter:blur(90px);opacity:.38;animation:drift 22s ease-in-out infinite alternate}
.bg-aurora i:nth-child(1){background:#2563eb;left:-15%;top:-20%}
.bg-aurora i:nth-child(2){background:#7c3aed;right:-20%;top:25%;animation-duration:28s}
.bg-aurora i:nth-child(3){background:#0891b2;left:20%;bottom:-30%;animation-duration:32s;opacity:.25}
@keyframes drift{to{transform:translate(8vmax,6vmax) scale(1.15)}}
.bg-grid{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;opacity:.16;-webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 75%)}

/* ---------- 3) คอมโพเนนต์ร่วม ---------- */
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--violet));box-shadow:0 0 24px rgba(99,102,241,.6)}
.brand-mark b{font-family:'Space Grotesk';font-weight:700;font-size:18px;color:#fff}
.brand-name{font-weight:700;font-size:20px;line-height:1.05;display:flex;flex-direction:column}
.brand-name small{font-weight:300;font-size:11px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border-radius:999px;padding:11px 24px;transition:transform .3s var(--ease),box-shadow .3s,background .3s;cursor:pointer;border:1px solid transparent;font-family:inherit;font-size:15px}
.btn-lg{padding:15px 32px;font-size:17px}
.btn-glow{color:#0b1330;background:linear-gradient(120deg,var(--gold),#ffe08a 50%,var(--gold2));box-shadow:0 0 0 0 rgba(251,191,36,.5),0 10px 30px -8px rgba(251,191,36,.6)}
.btn-glow:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 0 0 6px rgba(251,191,36,.15),0 16px 40px -8px rgba(251,191,36,.8)}
.btn-ghost{color:var(--ink);background:var(--glass);border-color:var(--line);backdrop-filter:blur(10px)}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}

.sound-btn{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--glass);color:var(--ink);display:grid;place-items:center;cursor:pointer;backdrop-filter:blur(10px)}
.sound-btn svg{width:20px;height:20px}
.sound-btn.muted .wave{display:none}

.eyebrow{display:inline-block;font-family:'Space Grotesk';font-size:13px;letter-spacing:.32em;color:var(--cyan);margin-bottom:14px}
.pill{display:inline-flex;align-items:center;gap:10px;padding:7px 16px;border-radius:999px;background:var(--glass);border:1px solid var(--line);font-size:13px;letter-spacing:.08em;color:#cfe0ff;backdrop-filter:blur(10px)}
.pill .dot{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 0 0 rgba(52,211,153,.7);animation:ping 2s infinite}
@keyframes ping{70%{box-shadow:0 0 0 10px rgba(52,211,153,0)}100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}}

.section{padding:120px 0;position:relative}
.section-head{text-align:center;max-width:820px;margin:0 auto 64px}
.section-head h2{font-size:clamp(30px,4.4vw,52px);line-height:1.2;font-weight:700;letter-spacing:-.01em}
.section-head p{margin-top:20px;color:var(--muted);font-size:18px;font-weight:300}

.card{position:relative;background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.025));border:1px solid var(--line);border-radius:var(--radius);padding:34px;backdrop-filter:blur(14px);transition:border-color .4s,box-shadow .4s,transform .4s var(--ease);overflow:hidden}
.card::before{content:"";position:absolute;inset:0;background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),rgba(96,165,250,.18),transparent 45%);opacity:0;transition:opacity .4s;pointer-events:none}
.card:hover{border-color:rgba(96,165,250,.5);box-shadow:0 30px 60px -30px rgba(59,130,246,.55)}
.card:hover::before{opacity:1}
.card h3{font-size:22px;margin:18px 0 10px;font-weight:600}
.card h3 small{display:block;font-size:12px;font-weight:300;color:var(--cyan);letter-spacing:.16em;text-transform:uppercase}
.card p{color:var(--muted);font-weight:300}
.ico{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(59,130,246,.3),rgba(139,92,246,.3));border:1px solid var(--line);color:#bcd2ff}
.ico svg{width:28px;height:28px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}

/* Hero (ส่วนที่ใช้ร่วม) */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:center;overflow:hidden}
#neural{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-inner{position:relative;z-index:2}
.hero h1{font-size:clamp(38px,6.2vw,84px);line-height:1.12;font-weight:700;letter-spacing:-.02em;margin:24px 0 22px}
.hero h1 .line{display:block;overflow:hidden;padding-bottom:.08em}
.hero h1 .line>span{display:inline-block;white-space:nowrap;padding-right:.1em}
.grad{background:linear-gradient(100deg,#7dd3fc,#60a5fa 25%,#c4b5fd 50%,var(--gold) 75%,#7dd3fc);background-size:200% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:flow 6s linear infinite}
@keyframes flow{to{background-position:-200% 0}}
.lead{font-size:clamp(17px,1.7vw,22px);color:var(--muted);font-weight:300;max-width:640px}
.lead b{color:var(--gold);font-weight:600}
.lead-strong{display:block;margin-top:10px;color:#fff;font-weight:500}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.stats{display:flex;gap:14px;margin-top:44px}
.stats li{padding:16px 22px;border-radius:18px;background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(12px);min-width:118px}
.stats strong{display:block;font-family:'Space Grotesk';font-size:38px;line-height:1;background:linear-gradient(120deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{font-size:13px;color:var(--muted)}

/* Services */
.services{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.service{padding:36px 30px;border-radius:var(--radius);border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.05),transparent);position:relative;transition:transform .4s var(--ease),border-color .4s}
.service:hover{transform:translateY(-8px);border-color:var(--gold)}
.service .num{font-family:'Space Grotesk';font-size:54px;font-weight:700;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.3)}
.service h3{font-size:22px;margin:14px 0 8px}
.service p{color:var(--muted);font-weight:300}

/* Portfolio */
.filters{display:flex;justify-content:center;gap:12px;margin-bottom:44px;flex-wrap:wrap}
.filter-btn{padding:10px 26px;border-radius:999px;border:1px solid var(--line);background:var(--glass);font-weight:500;transition:all .3s}
.filter-btn:hover{border-color:var(--cyan)}
.filter-btn.active{background:linear-gradient(120deg,var(--blue),var(--violet));border-color:transparent;box-shadow:0 8px 28px -6px rgba(99,102,241,.7)}
.pf-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.pf-icon{font-size:44px;width:72px;height:72px;border-radius:20px;display:grid;place-items:center;background:rgba(255,255,255,.07);border:1px solid var(--line);margin-bottom:18px}
.pf-item h4{font-size:19px;font-weight:600;line-height:1.4;margin:14px 0 10px}
.pf-item p b{color:var(--gold);font-weight:500}
.tag{font-size:12px;padding:3px 12px;border-radius:999px;letter-spacing:.06em}
.tag.gov{background:rgba(59,130,246,.2);color:#93c5fd}
.tag.private{background:rgba(52,211,153,.18);color:#6ee7b7}
.pf-item.hide{display:none}

/* Vision */
.vision-card{position:relative;padding:72px 56px;border-radius:32px;text-align:center;border:1px solid var(--line);background:radial-gradient(80% 120% at 50% 0%,rgba(59,130,246,.22),rgba(255,255,255,.03));overflow:hidden}
.vision-card blockquote{font-size:clamp(22px,2.8vw,34px);font-weight:300;line-height:1.6;max-width:900px;margin:10px auto 44px}
.vision-sub{max-width:760px;margin:0 auto;padding:32px;border-radius:22px;background:rgba(255,255,255,.06);border:1px solid var(--line)}
.vision-sub h3{color:var(--gold);font-size:24px;margin-bottom:10px}
.vision-sub p{color:#cfdcff;font-weight:300}
.vision-sub .c1{color:var(--gold)}.vision-sub .c2{color:#7dd3fc}.vision-sub .c3{color:#6ee7b7}
.vision-sub .closing{margin-top:16px;color:#fff;font-weight:500;font-size:19px}

/* Contact */
.contact{padding:40px 0 60px}
.contact-card{position:relative;text-align:center;padding:80px 48px;border-radius:36px;border:1px solid var(--line);background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.02));overflow:hidden}
.contact-glow{position:absolute;width:520px;height:520px;left:50%;top:-260px;transform:translateX(-50%);background:radial-gradient(circle,rgba(251,191,36,.35),transparent 65%);pointer-events:none}
.contact-card h2{font-size:clamp(28px,4vw,48px);line-height:1.25;font-weight:700;position:relative}
.contact-card>p{max-width:640px;margin:20px auto 34px;color:var(--muted);font-weight:300;font-size:18px;position:relative}
.contact-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;position:relative}
.contact-list{margin:54px auto 0;max-width:820px;display:grid;grid-template-columns:1fr 1fr;gap:14px;text-align:left;position:relative}
.contact-list li{padding:16px 20px;border-radius:16px;background:rgba(0,0,0,.25);border:1px solid var(--line);display:flex;flex-direction:column}
.contact-list b{font-size:12px;letter-spacing:.2em;color:var(--cyan);font-weight:500;text-transform:uppercase}
.contact-list span{color:#dbe6ff;font-weight:300;word-break:break-word}
.copyright{text-align:center;color:#6f80a8;font-size:14px;margin-top:30px}

/* Intro (โหลดหน้าแรก) */
#intro{position:fixed;inset:0;z-index:999;background:var(--bg);display:grid;place-content:center;justify-items:center;gap:14px;transition:opacity .8s,visibility .8s}
#intro.done{opacity:0;visibility:hidden;pointer-events:none}
.intro-core{position:relative;width:90px;height:90px;margin-bottom:12px}
.intro-core span{position:absolute;inset:0;border-radius:50%;border:2px solid transparent;border-top-color:var(--cyan);animation:spin 1.2s linear infinite}
.intro-core span:nth-child(2){inset:12px;border-top-color:var(--violet);animation-duration:1.8s;animation-direction:reverse}
.intro-core span:nth-child(3){inset:26px;border-top-color:var(--gold);animation-duration:.9s}
@keyframes spin{to{transform:rotate(360deg)}}
.intro-text{font-family:'Space Grotesk';font-weight:700;font-size:28px;letter-spacing:.4em;text-indent:.4em}
.intro-sub{font-size:11px;letter-spacing:.4em;color:var(--muted)}

/* Reveal (ซ่อนก่อนเลื่อนถึง; JS เป็นตัวเปิด) */
.js .reveal{opacity:0;transform:translateY(40px)}

/* ตัวช่วยแสดงผลแยกอุปกรณ์ */
.only-mobile{display:none!important}

/* =====================================================
   4) DESKTOP  (>= 900px) — เมนูบน, Hero 2 คอลัมน์, Grid, เมาส์เอฟเฟกต์
   ===================================================== */
@media (min-width:900px){
  .nav-desktop{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 0;transition:background .4s,padding .4s,border-color .4s;border-bottom:1px solid transparent}
  .nav-desktop.scrolled{background:rgba(5,11,31,.72);backdrop-filter:blur(18px);padding:10px 0;border-color:var(--line)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between}
  .nav-links{display:flex;gap:6px;padding:6px;border-radius:999px;background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(12px)}
  .nav-links a{padding:8px 20px;border-radius:999px;font-weight:400;color:#c8d6f5;transition:all .3s}
  .nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.12);color:#fff}
  .nav-actions{display:flex;gap:12px;align-items:center}

  .hero-inner{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center;padding-top:60px}
  .hero h1{font-size:clamp(40px,4.9vw,72px)}
  .hero-visual{position:relative;height:560px}
  .orb{position:absolute;inset:0;display:grid;place-items:center}
  .orb-core{width:200px;height:200px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle at 30% 25%,#93c5fd,#3b82f6 40%,#4c1d95 100%);box-shadow:0 0 90px 10px rgba(99,102,241,.7),inset 0 0 60px rgba(255,255,255,.35);animation:float 6s ease-in-out infinite}
  .orb-core span{font-family:'Space Grotesk';font-weight:700;font-size:72px;color:#fff;text-shadow:0 0 30px rgba(255,255,255,.8)}
  .orb-ring{position:absolute;border-radius:50%;border:1px dashed rgba(147,197,253,.4)}
  .orb-ring.r1{width:300px;height:300px;animation:spin 24s linear infinite}
  .orb-ring.r2{width:410px;height:410px;border-style:solid;border-color:rgba(139,92,246,.35);animation:spin 36s linear infinite reverse}
  .orb-ring.r3{width:520px;height:520px;border-color:rgba(251,191,36,.25);animation:spin 50s linear infinite}
  .orb-ring::after{content:"";position:absolute;top:-5px;left:50%;width:10px;height:10px;border-radius:50%;background:var(--cyan);box-shadow:0 0 16px var(--cyan)}
  @keyframes float{50%{transform:translateY(-16px)}}
  .float-card{position:absolute;padding:14px 20px;border-radius:18px;background:rgba(10,19,48,.65);border:1px solid var(--line);backdrop-filter:blur(14px);display:flex;flex-direction:column;box-shadow:0 20px 40px -20px #000;animation:float 7s ease-in-out infinite}
  .float-card i{position:absolute;top:14px;right:14px;width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 10px #34d399}
  .float-card b{font-size:17px}.float-card small{color:var(--muted);font-weight:300}
  .fc1{top:40px;left:-10px}.fc2{bottom:90px;left:-30px;animation-delay:-2s}.fc3{top:200px;right:-10px;animation-delay:-4s}
  .scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);width:26px;height:44px;border:2px solid rgba(255,255,255,.4);border-radius:14px;z-index:3}
  .scroll-hint span{position:absolute;top:8px;left:50%;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:#fff;animation:wheel 1.6s infinite}
  @keyframes wheel{to{transform:translateY(16px);opacity:0}}
  .card:hover{transform:translateY(-8px)}
  .pf-item.card:hover{transform:translateY(-8px)}
}

/* =====================================================
   5) MOBILE  (< 900px) — แถบบน + Tab bar ล่าง, Hero แนวตั้ง, ผลงานปัดข้าง
   ===================================================== */
@media (max-width:899.98px){
  .only-desktop{display:none!important}
  .only-mobile{display:flex!important}
  body{padding-bottom:calc(82px + env(safe-area-inset-bottom))}
  .wrap{width:calc(100% - 36px)}

  .top-mobile{position:fixed;top:0;left:0;right:0;z-index:100;justify-content:space-between;align-items:center;padding:calc(10px + env(safe-area-inset-top)) 18px 10px;background:rgba(5,11,31,.7);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
  .top-mobile .brand-mark{width:36px;height:36px;border-radius:11px}
  .top-mobile .brand-name{font-size:17px}

  /* Tab bar ลอยล่างสไตล์แอป */
  .tabbar{position:fixed;left:14px;right:14px;bottom:calc(12px + env(safe-area-inset-bottom));z-index:100;justify-content:space-around;padding:8px 6px;border-radius:26px;background:rgba(10,19,48,.82);backdrop-filter:blur(20px);border:1px solid var(--line);box-shadow:0 20px 40px -10px rgba(0,0,0,.7)}
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;border-radius:18px;color:#8fa2cf;font-size:11px;transition:all .3s}
  .tabbar svg{width:22px;height:22px}
  .tabbar a.active{color:#fff;background:linear-gradient(135deg,rgba(59,130,246,.45),rgba(139,92,246,.45))}

  .fab-call{position:fixed;right:18px;bottom:calc(98px + env(safe-area-inset-bottom));z-index:99;width:54px;height:54px;border-radius:50%;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--gold),var(--gold2));color:#0b1330;box-shadow:0 10px 30px -4px rgba(251,191,36,.7);animation:ring 3s infinite}
  .fab-call svg{width:24px;height:24px}
  @keyframes ring{0%,80%,100%{transform:rotate(0)}85%{transform:rotate(-14deg)}90%{transform:rotate(14deg)}95%{transform:rotate(-8deg)}}

  .hero{align-items:flex-start;padding-top:96px;min-height:auto;padding-bottom:50px}
  .hero-inner{text-align:center}
  .hero-copy{display:flex;flex-direction:column;align-items:center}
  .hero h1{font-size:clamp(28px,8.2vw,46px)}
  .lead{font-size:16px}
  .hero-cta{flex-direction:column;width:100%}
  .hero-cta .btn{width:100%}
  .stats{display:grid;grid-template-columns:repeat(3,1fr);width:100%;gap:10px;margin-top:34px}
  .stats li{min-width:0;padding:14px 6px}
  .stats strong{font-size:30px}
  .stats span{font-size:12px}

  .section{padding:70px 0}
  .section-head{margin-bottom:38px}
  .section-head p{font-size:16px}
  .grid-3,.services{grid-template-columns:1fr;gap:16px}
  .card{padding:26px}
  .service{padding:26px 22px;display:grid;grid-template-columns:auto 1fr;column-gap:18px;align-items:center}
  .service .num{grid-row:span 2;font-size:44px}
  .service h3{margin:0 0 4px;font-size:19px}

  /* ผลงาน: เลื่อนปัดแนวนอนแบบการ์ดแอป */
  .pf-grid{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;margin-inline:-18px;padding:6px 18px 18px;scrollbar-width:none}
  .pf-grid::-webkit-scrollbar{display:none}
  .pf-item{flex:0 0 82%;scroll-snap-align:center}
  .swipe-hint{justify-content:center;color:var(--muted);font-size:13px;margin-top:4px}
  .filters{gap:8px}
  .filter-btn{padding:8px 18px;font-size:14px}

  .vision-card{padding:42px 22px;border-radius:26px}
  .vision-sub{padding:22px}
  .contact-card{padding:50px 22px;border-radius:28px}
  .contact-actions{flex-direction:column}
  .contact-actions .btn{width:100%}
  .contact-list{grid-template-columns:1fr}
}

/* ลดการเคลื่อนไหวสำหรับผู้ที่ตั้งค่าไว้ */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
}