/* ═══════════════════════════════════════
   ASTRANOCTURNA — STYLE.CSS
   Tông: Deep Blue + White
   ═══════════════════════════════════════ */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
    --accent:#2563eb;--accent-light:#60a5fa;--accent-dark:#1d4ed8;
    --blue:#3b82f6;--blue-light:#93c5fd;--blue-dark:#1e40af;
    --bg:#060b18;--bg2:#0a1025;--bg3:#0e1530;
    --card-bg:rgba(10,16,37,0.75);--card-border:rgba(59,130,246,0.12);
    --text:#ffffff;--text-dim:rgba(255,255,255,0.6);--text-muted:rgba(255,255,255,0.35);
    --glow:rgba(37,99,235,0.2);--glow-strong:rgba(37,99,235,0.4);
    --gradient:linear-gradient(135deg,#93c5fd,#3b82f6,#1d4ed8);
    --gradient-sm:linear-gradient(135deg,#60a5fa,#2563eb,#1e40af);
    --max-w:1200px;
}

html{scroll-behavior:smooth;touch-action:manipulation;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;overflow-x:hidden}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden;-webkit-font-smoothing:antialiased;position:relative;touch-action:manipulation;-webkit-user-select:none;-moz-user-select:none;user-select:none;-webkit-touch-callout:none}
*{-webkit-touch-callout:none}

/* ═══ FULL PAGE STAR BG ═══ */
body::before{
    content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
    background:
        radial-gradient(1.5px 1.5px at 10% 15%, rgba(96,165,250,0.5) 50%, transparent 50%),
        radial-gradient(1px 1px at 25% 35%, rgba(255,255,255,0.35) 50%, transparent 50%),
        radial-gradient(1.5px 1.5px at 40% 8%, rgba(59,130,246,0.4) 50%, transparent 50%),
        radial-gradient(1px 1px at 55% 45%, rgba(255,255,255,0.3) 50%, transparent 50%),
        radial-gradient(1.2px 1.2px at 70% 20%, rgba(96,165,250,0.45) 50%, transparent 50%),
        radial-gradient(1px 1px at 85% 50%, rgba(255,255,255,0.3) 50%, transparent 50%),
        radial-gradient(1.5px 1.5px at 15% 65%, rgba(37,99,235,0.35) 50%, transparent 50%),
        radial-gradient(1px 1px at 30% 80%, rgba(255,255,255,0.25) 50%, transparent 50%),
        radial-gradient(1.2px 1.2px at 50% 70%, rgba(96,165,250,0.35) 50%, transparent 50%),
        radial-gradient(1px 1px at 65% 85%, rgba(255,255,255,0.3) 50%, transparent 50%),
        radial-gradient(1.5px 1.5px at 80% 60%, rgba(59,130,246,0.4) 50%, transparent 50%),
        radial-gradient(1px 1px at 92% 30%, rgba(255,255,255,0.35) 50%, transparent 50%),
        radial-gradient(1px 1px at 5% 90%, rgba(96,165,250,0.3) 50%, transparent 50%),
        radial-gradient(1.3px 1.3px at 45% 25%, rgba(255,255,255,0.3) 50%, transparent 50%),
        radial-gradient(1px 1px at 75% 42%, rgba(37,99,235,0.3) 50%, transparent 50%),
        radial-gradient(1px 1px at 95% 75%, rgba(255,255,255,0.25) 50%, transparent 50%);
    animation:starDrift 60s linear infinite;
}
body::after{
    content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
    background:
        radial-gradient(1px 1px at 8% 22%, rgba(255,255,255,0.3) 50%, transparent 50%),
        radial-gradient(1.3px 1.3px at 22% 55%, rgba(96,165,250,0.4) 50%, transparent 50%),
        radial-gradient(1px 1px at 38% 12%, rgba(255,255,255,0.25) 50%, transparent 50%),
        radial-gradient(1.5px 1.5px at 52% 38%, rgba(59,130,246,0.35) 50%, transparent 50%),
        radial-gradient(1px 1px at 68% 62%, rgba(255,255,255,0.3) 50%, transparent 50%),
        radial-gradient(1.2px 1.2px at 82% 18%, rgba(96,165,250,0.4) 50%, transparent 50%),
        radial-gradient(1px 1px at 18% 78%, rgba(37,99,235,0.3) 50%, transparent 50%),
        radial-gradient(1px 1px at 58% 88%, rgba(255,255,255,0.2) 50%, transparent 50%),
        radial-gradient(1.3px 1.3px at 88% 45%, rgba(96,165,250,0.35) 50%, transparent 50%),
        radial-gradient(1px 1px at 42% 55%, rgba(255,255,255,0.3) 50%, transparent 50%);
    animation:starDrift 80s linear infinite reverse;
}
@keyframes starDrift{
    0%{transform:translateY(0)}
    100%{transform:translateY(-30px)}
}
.main-page,.section,.footer,.hero{position:relative;z-index:1}
#services{overflow:hidden}

/* ═══ INTRO ═══ */
#intro-overlay{position:fixed;inset:0;z-index:10000;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg);transition:transform .9s cubic-bezier(.76,0,.24,1)}
#intro-overlay.hide{transform:translateY(-100%)}
#starfield{position:absolute;inset:0;z-index:0}
#introTextCanvas{position:absolute;inset:0;z-index:1}
.intro-bottom{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;width:100%;margin-top:10vh}
.progress-wrap{margin-top:30px;width:min(60vw,500px);height:3px;background:rgba(139,92,246,.06);border-radius:4px;overflow:hidden;opacity:0;animation:fadeUp .6s ease .3s forwards}
.progress-bar{width:0;height:100%;border-radius:4px;background:var(--gradient-sm);box-shadow:0 0 15px var(--glow)}
.progress-pct{font-family:'Orbitron',sans-serif;font-size:14px;color:rgba(167,139,250,.45);margin-top:16px;opacity:0;animation:fadeUp .6s ease .8s forwards}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}

/* ═══ MAIN ═══ */
.main-page{opacity:0;transition:opacity .6s ease .3s}.main-page.visible{opacity:1}

/* ═══ NAV — Full-width at top → Capsule on scroll ═══ */
.nav-outer{
    position:fixed;top:0;left:0;right:0;z-index:1000;
    padding:0 0;
    transition:padding .5s cubic-bezier(.4,0,.2,1), top .4s ease;
}
.nav-outer.scrolled{
    padding:10px 20px;
}
.nav{
    max-width:100%;
    margin:0 auto;
    padding:14px 32px;
    border-radius:0;
    backdrop-filter:blur(24px);
    -webkit-backdrop-filter:blur(24px);
    background:rgba(12,10,26,0.88);
    border:1px solid rgba(167,139,250,0.06);
    border-left:none;border-right:none;border-top:none;
    display:flex;
    align-items:center;
    justify-content:space-between;
    transition:all .5s cubic-bezier(.4,0,.2,1);
    position:relative;
    overflow:hidden;
    box-shadow:0 2px 20px rgba(0,0,0,0.3);
}
.nav-outer.scrolled .nav{
    max-width:var(--max-w);
    border-radius:60px;
    border:1px solid rgba(167,139,250,0.1);
    background:rgba(12,10,26,0.8);
    box-shadow:0 4px 30px rgba(0,0,0,0.4), 0 0 15px rgba(139,92,246,0.03);
    padding:10px 28px;
}
/* Scroll progress bar — neon LED */
.nav-progress{
    position:absolute;
    bottom:0;left:0;
    height:2.5px;
    width:0%;
    background:var(--gradient-sm);
    box-shadow:0 0 6px var(--accent), 0 0 14px var(--glow), 0 0 30px rgba(139,92,246,0.08);
    transition:width .15s linear;
    z-index:10;
}
.nav-progress::after{
    content:'';
    position:absolute;
    right:0;top:-2px;
    width:40px;height:6px;
    background:radial-gradient(ellipse,var(--accent),transparent);
    border-radius:50%;
    filter:blur(2px);
}
.nav-brand{display:flex;align-items:center;text-decoration:none;white-space:nowrap;flex-shrink:0}
.nav-logo{height:36px;width:auto;display:block;filter:drop-shadow(0 0 8px rgba(37,99,235,0.3));transition:filter 0.3s}
.nav-logo:hover{filter:drop-shadow(0 0 14px rgba(37,99,235,0.5))}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{
    color:var(--text-dim);text-decoration:none;font-size:14px;font-weight:500;
    transition:color .3s, text-shadow .3s;
    position:relative;padding:4px 0;
}
.nav-links a:hover{color:var(--accent-light)}
.nav-links a::after{
    content:'';position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);
    width:0;height:2px;
    background:var(--gradient-sm);
    box-shadow:0 0 6px var(--accent),0 0 12px var(--glow);
    transition:width .3s cubic-bezier(.4,0,.2,1);
    border-radius:2px;
}
.nav-links a:hover::after{width:100%}
/* Active nav link — LED glow */
.nav-links a.active{
    color:var(--accent-light);
    text-shadow:0 0 8px rgba(167,139,250,0.4);
}
.nav-links a.active::after{
    width:100%;
    animation:ledPulse 2s ease-in-out infinite;
}
@keyframes ledPulse{
    0%,100%{box-shadow:0 0 4px var(--accent),0 0 8px var(--glow)}
    50%{box-shadow:0 0 8px var(--accent),0 0 20px var(--glow-strong),0 0 30px rgba(139,92,246,0.15)}
}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px;background:none;border:none}
.nav-toggle span{width:24px;height:2px;background:var(--text);transition:all .3s;border-radius:2px}
.nav-cta{padding:8px 20px;border:1px solid var(--accent);border-radius:50px;color:var(--accent-light);font-size:13px;font-weight:600;text-decoration:none;transition:all .3s;white-space:nowrap}
.nav-cta:hover{background:var(--accent);color:#fff;box-shadow:0 0 20px var(--glow)}

@media(max-width:768px){
    .nav-outer.scrolled{padding:8px 10px}
    .nav{padding:10px 18px}
    .nav-outer.scrolled .nav{border-radius:20px;padding:8px 16px}
    .nav-links{display:none}
    .nav-toggle{display:flex}
    .nav-cta{display:none}
}

/* ═══ MOBILE FULL-SCREEN MENU OVERLAY ═══ */
.mobile-menu-overlay{
    position:fixed;inset:0;z-index:10000;
    background:rgba(6,11,24,0.98);
    backdrop-filter:blur(30px);
    -webkit-backdrop-filter:blur(30px);
    display:flex;flex-direction:column;
    opacity:0;pointer-events:none;
    transform:translateY(-20px);
    transition:opacity 0.4s cubic-bezier(0.23,1,0.32,1), transform 0.4s cubic-bezier(0.23,1,0.32,1);
    overflow-y:auto;
}
.mobile-menu-overlay.open{
    opacity:1;pointer-events:auto;
    transform:translateY(0);
}
.mobile-menu-header{
    display:flex;align-items:center;justify-content:space-between;
    padding:16px 24px;
    border-bottom:1px solid rgba(59,130,246,0.08);
    background:rgba(10,16,37,0.7);
    flex-shrink:0;
}
.mobile-menu-brand{
    display:flex;align-items:center;
    text-decoration:none;
}
.mobile-menu-logo{
    height:36px;width:auto;display:block;
    filter:drop-shadow(0 0 8px rgba(37,99,235,0.3));
}
.mobile-menu-close{
    width:40px;height:40px;
    border-radius:50%;
    background:rgba(255,255,255,0.05);
    border:1px solid rgba(255,255,255,0.1);
    color:#fff;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:all 0.3s;
}
.mobile-menu-close svg{width:20px;height:20px}
.mobile-menu-close:hover,.mobile-menu-close:active{
    background:rgba(239,68,68,0.2);
    border-color:rgba(239,68,68,0.4);
    transform:rotate(90deg);
}
.mobile-menu-body{
    flex:1;display:flex;flex-direction:column;
    justify-content:space-between;
    padding:20px 24px 30px;
}
.mobile-menu-links{
    list-style:none;display:flex;flex-direction:column;gap:0;
}
.mobile-menu-links li{
    border-bottom:1px solid rgba(255,255,255,0.06);
}
.mobile-menu-links li:last-child{border-bottom:none}
.mobile-menu-link{
    display:block;padding:18px 4px;
    color:var(--text);text-decoration:none;
    font-size:16px;font-weight:500;
    transition:all 0.3s;
    position:relative;
}
.mobile-menu-link:hover,.mobile-menu-link:active{
    color:var(--accent-light);
    padding-left:12px;
}
.mobile-menu-link::after{
    content:'';position:absolute;bottom:0;left:0;
    width:0;height:2px;
    background:var(--gradient-sm);
    transition:width 0.3s;
}
.mobile-menu-link:hover::after{width:60px}

/* Stagger animation for menu items */
.mobile-menu-overlay.open .mobile-menu-link{
    animation:menuItemIn 0.5s cubic-bezier(0.23,1,0.32,1) both;
}
.mobile-menu-overlay.open .mobile-menu-links li:nth-child(1) .mobile-menu-link{animation-delay:0.05s}
.mobile-menu-overlay.open .mobile-menu-links li:nth-child(2) .mobile-menu-link{animation-delay:0.1s}
.mobile-menu-overlay.open .mobile-menu-links li:nth-child(3) .mobile-menu-link{animation-delay:0.15s}
.mobile-menu-overlay.open .mobile-menu-links li:nth-child(4) .mobile-menu-link{animation-delay:0.2s}
.mobile-menu-overlay.open .mobile-menu-links li:nth-child(5) .mobile-menu-link{animation-delay:0.25s}
@keyframes menuItemIn{
    from{opacity:0;transform:translateX(-20px)}
    to{opacity:1;transform:translateX(0)}
}

.mobile-menu-bottom{
    display:flex;flex-direction:column;gap:12px;
    margin-top:30px;
}
.mobile-menu-phone{
    display:flex;align-items:center;justify-content:center;gap:10px;
    padding:16px 20px;
    border-radius:14px;
    background:rgba(255,255,255,0.04);
    border:1px solid rgba(255,255,255,0.1);
    color:var(--text);text-decoration:none;
    font-size:16px;font-weight:600;letter-spacing:1px;
    transition:all 0.3s;
}
.mobile-menu-phone:hover,.mobile-menu-phone:active{
    background:rgba(37,99,235,0.1);
    border-color:rgba(37,99,235,0.3);
}
.mobile-menu-cta{
    display:block;text-align:center;
    padding:16px 20px;
    border-radius:14px;
    background:linear-gradient(135deg,var(--accent),#06b6d4);
    color:#fff;text-decoration:none;
    font-size:16px;font-weight:700;
    transition:all 0.3s;
    box-shadow:0 4px 20px rgba(37,99,235,0.3);
}
.mobile-menu-cta:hover,.mobile-menu-cta:active{
    transform:translateY(-2px);
    box-shadow:0 8px 30px rgba(37,99,235,0.4);
}

/* Only show overlay on mobile */
@media(min-width:769px){
    .mobile-menu-overlay{display:none !important}
}

/* ═══ FLOATING CONTACT BUTTON ═══ */
.float-contact{
    position:fixed;bottom:30px;right:30px;z-index:998;
    display:flex;flex-direction:column;align-items:flex-end;gap:12px;
}
.float-contact-btn{
    width:56px;height:56px;
    border-radius:50%;
    background:linear-gradient(135deg,var(--accent),#06b6d4);
    border:none;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    color:#fff;
    box-shadow:0 4px 20px rgba(37,99,235,0.4),0 0 30px rgba(37,99,235,0.15);
    transition:all 0.4s cubic-bezier(0.23,1,0.32,1);
    position:relative;
    z-index:3;
}
.float-contact-btn:hover{
    transform:scale(1.1);
    box-shadow:0 6px 30px rgba(37,99,235,0.5),0 0 40px rgba(37,99,235,0.2);
}
.float-contact-btn svg{width:24px;height:24px;transition:all 0.3s}
.float-contact-icon-close{
    position:absolute;
    opacity:0;transform:rotate(-90deg) scale(0.5);
    transition:all 0.3s;
}
.float-contact.open .float-contact-icon-msg{
    opacity:0;transform:rotate(90deg) scale(0.5);
}
.float-contact.open .float-contact-icon-close{
    opacity:1;transform:rotate(0) scale(1);
}
/* Pulse ring */
.float-contact-btn::before{
    content:'';position:absolute;inset:-4px;
    border-radius:50%;
    border:2px solid rgba(37,99,235,0.4);
    animation:floatPulse 2.5s ease-in-out infinite;
}
@keyframes floatPulse{
    0%,100%{transform:scale(1);opacity:0.6}
    50%{transform:scale(1.25);opacity:0}
}
/* Notification dot */
.float-contact-btn::after{
    content:'';position:absolute;top:2px;right:2px;
    width:12px;height:12px;
    border-radius:50%;
    background:#22c55e;
    border:2px solid var(--bg);
    animation:dotPulse 2s ease-in-out infinite;
}
@keyframes dotPulse{
    0%,100%{transform:scale(1)}
    50%{transform:scale(1.2)}
}

/* Options popup */
.float-contact-options{
    display:flex;flex-direction:column;gap:8px;
    opacity:0;pointer-events:none;
    transform:translateY(10px) scale(0.9);
    transition:all 0.35s cubic-bezier(0.23,1,0.32,1);
    margin-bottom:8px;
}
.float-contact.open .float-contact-options{
    opacity:1;pointer-events:auto;
    transform:translateY(0) scale(1);
}
.float-option{
    display:flex;align-items:center;gap:10px;
    padding:12px 20px;
    border-radius:14px;
    background:rgba(10,16,37,0.95);
    border:1px solid rgba(255,255,255,0.08);
    backdrop-filter:blur(20px);
    color:var(--text);text-decoration:none;
    font-size:14px;font-weight:600;
    transition:all 0.3s;
    white-space:nowrap;
    box-shadow:0 4px 15px rgba(0,0,0,0.3);
}
.float-option:hover{
    transform:translateX(-4px);
}
.float-option-zalo{
    color:#0088ff;
}
.float-option-zalo:hover{
    background:rgba(0,136,255,0.12);
    border-color:rgba(0,136,255,0.3);
    box-shadow:0 4px 20px rgba(0,136,255,0.15);
}
.float-option-fb{
    color:#1877f2;
}
.float-option-fb:hover{
    background:rgba(24,119,242,0.12);
    border-color:rgba(24,119,242,0.3);
    box-shadow:0 4px 20px rgba(24,119,242,0.15);
}

/* Chat bubble */
.float-contact-bubble{
    position:absolute;
    bottom:68px;right:0;
    padding:12px 18px;
    border-radius:16px 16px 4px 16px;
    background:rgba(10,16,37,0.95);
    border:1px solid rgba(59,130,246,0.15);
    backdrop-filter:blur(20px);
    color:var(--text);
    font-size:13px;font-weight:500;
    line-height:1.5;
    max-width:220px;
    white-space:nowrap;
    box-shadow:0 4px 20px rgba(0,0,0,0.3),0 0 15px rgba(37,99,235,0.08);
    opacity:0;pointer-events:none;
    transform:translateY(10px) scale(0.9);
    transition:all 0.4s cubic-bezier(0.23,1,0.32,1);
}
.float-contact-bubble.show{
    opacity:1;pointer-events:auto;
    transform:translateY(0) scale(1);
}
.float-bubble-arrow{
    position:absolute;bottom:-6px;right:20px;
    width:0;height:0;
    border-left:6px solid transparent;
    border-right:6px solid transparent;
    border-top:6px solid rgba(10,16,37,0.95);
}

/* Hide floating contact on very small screens if needed, and adjust */
@media(max-width:480px){
    .float-contact{bottom:20px;right:16px}
    .float-contact-btn{width:50px;height:50px}
    .float-contact-btn svg{width:22px;height:22px}
}


/* ═══ ABOUT US — TEAM CARDS ═══ */
.team-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:40px;
    max-width:900px;margin:0 auto;
}
.team-card{
    position:relative;
    background:var(--card-bg);
    border:1px solid var(--card-border);
    border-radius:24px;
    overflow:hidden;
    transition:all 0.5s cubic-bezier(0.23,1,0.32,1);
    backdrop-filter:blur(20px);
}
.team-card:hover{
    transform:translateY(-8px);
    border-color:rgba(37,99,235,0.3);
    box-shadow:0 20px 60px rgba(37,99,235,0.15),0 0 40px rgba(37,99,235,0.08);
}
.team-card-img-wrap{
    position:relative;
    width:100%;
    aspect-ratio:1/1;
    overflow:hidden;
    background:linear-gradient(135deg,rgba(37,99,235,0.08),rgba(6,182,212,0.08));
}
.team-card-img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform 0.6s cubic-bezier(0.23,1,0.32,1);
}
.team-card:hover .team-card-img{
    transform:scale(1.05);
}
.team-card-glow{
    position:absolute;inset:0;
    background:radial-gradient(circle at 50% 100%,rgba(37,99,235,0.2),transparent 70%);
    opacity:0;transition:opacity 0.5s;
    pointer-events:none;
}
.team-card:hover .team-card-glow{opacity:1}
.team-card-info{
    padding:24px 28px 28px;
}
.team-card-name{
    font-family:'Orbitron',sans-serif;
    font-size:16px;font-weight:700;
    letter-spacing:1px;
    background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
    margin-bottom:6px;
}
.team-card-role{
    font-size:13px;color:var(--accent-light);
    font-weight:600;margin-bottom:12px;
    letter-spacing:0.5px;
}
.team-card-desc{
    font-size:14px;color:var(--text-dim);
    line-height:1.7;
}
/* Decorative border glow on hover */
.team-card::before{
    content:'';position:absolute;inset:-1px;
    border-radius:24px;
    background:linear-gradient(135deg,rgba(37,99,235,0.3),rgba(6,182,212,0.3));
    z-index:-1;
    opacity:0;transition:opacity 0.5s;
}
.team-card:hover::before{opacity:1}

@media(max-width:768px){
    .team-grid{grid-template-columns:1fr;gap:24px;max-width:400px}
}

/* ═══ HERO ═══ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:120px 24px 60px}
#heroCanvas{position:absolute;inset:0;z-index:0}
.hero-content{position:relative;z-index:2;text-align:center;max-width:100%;overflow:visible}
.hero-badge{display:inline-block;padding:6px 18px;border:1px solid var(--card-border);border-radius:50px;font-size:12px;color:var(--accent-light);letter-spacing:2px;text-transform:uppercase;margin-bottom:24px;backdrop-filter:blur(10px);background:rgba(139,92,246,0.05)}
.hero h1{
    font-family:'Inter',sans-serif;font-size:clamp(24px,5.5vw,72px);font-weight:900;line-height:1.1;margin-bottom:20px;
    white-space:nowrap;
    background:linear-gradient(90deg,#fff,#93c5fd,#3b82f6,#60a5fa,#fff,#93c5fd,#3b82f6);
    background-size:300% 100%;
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
    animation:shimmerText 6s ease-in-out infinite;
}
@keyframes shimmerText{
    0%{background-position:0% 50%}
    50%{background-position:100% 50%}
    100%{background-position:0% 50%}
}
.hero h1 .gradient{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:clamp(14px,2vw,18px);color:var(--text-dim);line-height:1.8;max-width:600px;margin:0 auto 36px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{padding:14px 32px;background:linear-gradient(135deg,var(--accent-dark),var(--accent),var(--blue));border:none;border-radius:12px;color:#fff;font-size:15px;font-weight:700;cursor:pointer;transition:all .3s;text-decoration:none;box-shadow:0 4px 20px var(--glow)}
.btn-primary:hover{transform:translateY(-2px) scale(1.03);box-shadow:0 8px 30px var(--glow-strong)}
.btn-outline{padding:14px 32px;background:transparent;border:1.5px solid var(--card-border);border-radius:12px;color:var(--text);font-size:15px;font-weight:600;cursor:pointer;transition:all .3s;text-decoration:none;backdrop-filter:blur(10px)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent-light);box-shadow:0 0 20px var(--glow)}

/* Hero Stats */
/* Hero Language Showcase */
.hero-langs{
    display:grid;grid-template-columns:repeat(4,1fr);
    gap:16px;margin-top:50px;
}
.lang-card{
    position:relative;
    border-radius:16px;
    overflow:hidden;
    border:1px solid rgba(255,255,255,0.06);
    background:rgba(10,16,37,0.5);
    transition:all 0.5s cubic-bezier(0.23,1,0.32,1);
    cursor:pointer;
}
.lang-card:hover{
    transform:translateY(-6px) scale(1.02);
    box-shadow:0 20px 40px rgba(0,0,0,0.4);
}
.lang-card[data-lang="nodejs"]:hover{border-color:rgba(51,153,51,0.4);box-shadow:0 20px 40px rgba(0,0,0,0.4),0 0 25px rgba(51,153,51,0.15)}
.lang-card[data-lang="java"]:hover{border-color:rgba(248,152,32,0.4);box-shadow:0 20px 40px rgba(0,0,0,0.4),0 0 25px rgba(248,152,32,0.15)}
.lang-card[data-lang="php"]:hover{border-color:rgba(119,123,180,0.4);box-shadow:0 20px 40px rgba(0,0,0,0.4),0 0 25px rgba(119,123,180,0.15)}
.lang-card[data-lang="python"]:hover{border-color:rgba(55,118,171,0.4);box-shadow:0 20px 40px rgba(0,0,0,0.4),0 0 25px rgba(55,118,171,0.15)}
.lang-canvas{
    width:100%;height:160px;
    display:block;
}
.lang-name{
    padding:10px 0 12px;
    text-align:center;
    font-size:13px;font-weight:700;
    letter-spacing:1px;
    text-transform:uppercase;
    transition:all 0.3s;
}
.lang-card[data-lang="nodejs"] .lang-name{color:#339933}
.lang-card[data-lang="java"] .lang-name{color:#f89820}
.lang-card[data-lang="php"] .lang-name{color:#777BB4}
.lang-card[data-lang="python"] .lang-name{color:#FFD43B}
@media(max-width:768px){
    .hero-langs{grid-template-columns:repeat(2,1fr);gap:12px}
    .lang-canvas{height:140px}
}
@media(max-width:480px){
    .hero-langs{gap:8px;margin-top:36px}
    .lang-canvas{height:120px}
    .lang-name{font-size:11px;padding:8px 0 10px}
}

/* Floating Keywords */
.hero-keywords{position:absolute;bottom:40px;left:0;right:0;z-index:1;overflow:hidden;height:50px;opacity:0.15}
.keywords-track{display:flex;gap:40px;animation:scrollKW 30s linear infinite;white-space:nowrap}
.keywords-track span{font-family:'Orbitron',sans-serif;font-size:12px;letter-spacing:3px;color:var(--accent)}
@keyframes scrollKW{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ═══ SECTION COMMON ═══ */
.section{padding:100px 24px;position:relative}
.section-header{text-align:center;margin-bottom:60px}
.section-tag{display:inline-block;padding:6px 16px;border:1px solid var(--card-border);border-radius:50px;font-size:11px;color:var(--accent-light);letter-spacing:3px;text-transform:uppercase;margin-bottom:16px}
.section-title{
    font-size:clamp(28px,5vw,48px);font-weight:800;margin-bottom:16px;
    background:linear-gradient(90deg,#fff,#93c5fd,#3b82f6,#60a5fa,#fff,#93c5fd,#3b82f6);
    background-size:300% 100%;
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
    animation:shimmerText 6s ease-in-out infinite;
}
.section-title .highlight{
    background:linear-gradient(90deg,#fff,#93c5fd,#3b82f6,#60a5fa,#fff,#93c5fd);
    background-size:300% 100%;
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
    animation:shimmerText 6s ease-in-out infinite;
}
.section-desc{color:var(--text-dim);font-size:16px;max-width:600px;margin:0 auto;line-height:1.7}
.container{max-width:var(--max-w);margin:0 auto}

/* ═══ 3D COVERFLOW SERVICES ═══ */
.coverflow-wrap{
    position:relative;
    display:flex;align-items:center;justify-content:center;
    gap:0;
    padding:20px 0 60px;
    user-select:none;
    -webkit-user-select:none;
    touch-action:pan-y;
}
.cf-scene{
    position:relative;
    width:100%;max-width:900px;
    height:420px;
    perspective:1200px;
    perspective-origin:50% 45%;
    overflow:visible;
    cursor:grab;
    touch-action:pan-y;
}
.cf-scene:active{cursor:grabbing}
/* ── Each card ── */
.cf-card{
    position:absolute;
    width:260px;height:360px;
    left:50%;top:50%;
    margin-left:-130px;margin-top:-180px;
    border-radius:22px;
    overflow:hidden;
    cursor:pointer;
    transition:all 0.7s cubic-bezier(0.23, 1, 0.32, 1);
    transform-style:preserve-3d;
    backface-visibility:hidden;
    box-shadow:0 10px 40px rgba(0,0,0,0.5);
    border:2px solid transparent;
}
.cf-card.active{
    border-color:rgba(59,130,246,0.4);
    box-shadow:
        0 15px 50px rgba(0,0,0,0.6),
        0 0 25px rgba(37,99,235,0.15),
        0 0 50px rgba(37,99,235,0.08);
}
/* Card canvas */
.cf-card-canvas{
    position:absolute;inset:0;
    width:100%;height:100%;
    display:block;
}
.cf-card.active:hover .cf-card-canvas{
    filter:brightness(1.1);
}
/* Card info overlay */
.cf-card-info{
    position:absolute;bottom:0;left:0;right:0;
    padding:20px 16px;
    background:linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.4) 60%, transparent 100%);
    z-index:2;
    transform:translateY(5px);
    opacity:0.7;
    transition:all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}
.cf-card.active .cf-card-info{
    transform:translateY(0);
    opacity:1;
}
.cf-card-icon{
    width:36px;height:36px;
    border-radius:10px;
    background:rgba(255,255,255,0.1);
    border:1px solid rgba(255,255,255,0.15);
    display:flex;align-items:center;justify-content:center;
    margin-bottom:10px;padding:7px;
    backdrop-filter:blur(8px);
}
.cf-card-icon svg{width:100%;height:100%}
.cf-card-info h3{
    font-size:16px;font-weight:700;color:#fff;
    text-shadow:0 2px 8px rgba(0,0,0,0.5);
}
/* Reflection floor */
.cf-reflection{
    position:absolute;
    bottom:-40px;left:50%;
    transform:translateX(-50%);
    width:600px;height:80px;
    background:radial-gradient(ellipse at center,
        rgba(37,99,235,0.06) 0%,
        rgba(37,99,235,0.02) 50%,
        transparent 80%
    );
    pointer-events:none;
    filter:blur(8px);
}
/* ── Arrows ── */
.cf-arrow{
    position:relative;z-index:10;
    width:48px;height:48px;flex-shrink:0;
    border-radius:50%;
    background:rgba(10,16,37,0.7);
    border:1px solid rgba(59,130,246,0.15);
    backdrop-filter:blur(20px);
    cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    color:var(--accent-light);
    transition:all 0.3s;
}
.cf-arrow:hover{
    border-color:var(--accent);
    box-shadow:0 0 25px var(--glow);
    background:rgba(37,99,235,0.12);
    transform:scale(1.1);
}
.cf-arrow svg{width:20px;height:20px}
.cf-arrow-left{margin-right:-10px}
.cf-arrow-right{margin-left:-10px}

/* ═══ EXPAND MODAL ═══ */
.cf-modal-overlay{
    position:fixed;inset:0;z-index:10001;
    background:rgba(0,0,0,0.8);
    backdrop-filter:blur(12px);
    display:flex;align-items:center;justify-content:center;
    opacity:0;pointer-events:none;
    transition:opacity 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}
.cf-modal-overlay.show{
    opacity:1;pointer-events:auto;
}
.cf-modal-card{
    position:relative;
    width:90%;max-width:520px;
    border-radius:24px;overflow:hidden;
    background:rgba(10,16,37,0.95);
    border:1px solid rgba(59,130,246,0.2);
    box-shadow:0 30px 80px rgba(0,0,0,0.6), 0 0 40px rgba(37,99,235,0.1);
    transform:scale(0.8) translateY(30px);
    transition:transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.cf-modal-overlay.show .cf-modal-card{
    transform:scale(1) translateY(0);
}
.cf-modal-close{
    position:absolute;top:16px;right:16px;z-index:5;
    width:40px;height:40px;border-radius:50%;
    background:rgba(0,0,0,0.5);
    border:1px solid rgba(255,255,255,0.15);
    color:#fff;font-size:18px;
    cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:all 0.3s;
    backdrop-filter:blur(10px);
}
.cf-modal-close:hover{
    background:rgba(239,68,68,0.6);
    border-color:rgba(239,68,68,0.4);
    transform:rotate(90deg) scale(1.1);
}
.cf-modal-canvas{
    width:100%;height:280px;
    display:block;
}
.cf-modal-body{
    padding:28px 24px;
}
.cf-modal-icon{
    width:52px;height:52px;
    border-radius:14px;
    background:rgba(37,99,235,0.1);
    border:1px solid rgba(59,130,246,0.2);
    display:flex;align-items:center;justify-content:center;
    margin-bottom:16px;padding:11px;
}
.cf-modal-icon svg{width:100%;height:100%}
.cf-modal-body h3{
    font-size:22px;font-weight:800;color:#fff;margin-bottom:12px;
}
.cf-modal-body p{
    font-size:14px;color:rgba(255,255,255,0.7);line-height:1.8;margin-bottom:16px;
}
.cf-modal-tag{
    display:inline-block;
    padding:5px 16px;
    border-radius:50px;
    font-size:11px;font-weight:700;
    letter-spacing:2px;
    background:rgba(59,130,246,0.12);
    border:1px solid rgba(59,130,246,0.25);
    color:var(--accent-light);
}
@media(max-width:768px){
    .cf-scene{height:350px;max-width:100%}
    .cf-card{width:200px;height:280px;margin-left:-100px;margin-top:-140px}
    .cf-arrow{width:40px;height:40px}
    .cf-modal-img{height:200px}
    .cf-modal-body{padding:20px 18px}
}
@media(max-width:480px){
    .cf-scene{height:300px}
    .cf-card{width:170px;height:240px;margin-left:-85px;margin-top:-120px}
    .cf-arrow{width:36px;height:36px}
    .cf-arrow svg{width:16px;height:16px}
}

/* ═══ ACHIEVEMENTS ═══ */
/* ═══ HOLOGRAPHIC DASHBOARD ═══ */
.holo-dashboard{
    position:relative;
    height:420px;
    margin-top:10px;
    overflow:hidden;
    border-radius:24px;
    border:1px solid rgba(59,130,246,0.1);
    background:radial-gradient(ellipse at center, rgba(37,99,235,0.04) 0%, transparent 70%);
}
.holo-canvas{
    position:absolute;inset:0;
    width:100%;height:100%;
    display:block;
}
/* ── Floating stat pods ── */
.holo-stat{
    position:absolute;
    text-align:center;
    z-index:5;
    transition:all 0.5s cubic-bezier(0.23,1,0.32,1);
    animation:holoFloat 4s ease-in-out infinite;
}
.holo-stat:hover{
    transform:scale(1.1) translateY(-5px);
    filter:brightness(1.3);
}
.holo-stat-ring{
    width:80px;height:80px;
    margin:0 auto 8px;
    position:relative;
}
.holo-stat-ring svg{
    width:100%;height:100%;
    transform:rotate(-90deg);
    filter:drop-shadow(0 0 6px currentColor);
}
.holo-ring-fill{
    transition:stroke-dashoffset 2s cubic-bezier(0.23,1,0.32,1);
}
.holo-stat-value{
    font-size:28px;font-weight:900;
    letter-spacing:-1px;
    position:absolute;
    top:50%;left:50%;
    transform:translate(-50%,-50%);
    width:80px;
    color:#fff;
    text-shadow:0 0 15px rgba(59,130,246,0.4);
}
.holo-stat-label{
    font-size:11px;
    color:var(--text-dim);
    line-height:1.4;
    letter-spacing:0.5px;
    text-transform:uppercase;
    font-weight:600;
}
/* Position each stat */
.holo-stat-1{top:40px;left:8%}
.holo-stat-2{top:40px;right:8%}
.holo-stat-3{bottom:30px;left:12%}
.holo-stat-4{bottom:30px;right:12%}
/* Float animation with stagger */
.holo-stat-1{animation-delay:0s}
.holo-stat-2{animation-delay:0.5s}
.holo-stat-3{animation-delay:1s}
.holo-stat-4{animation-delay:1.5s}
@keyframes holoFloat{
    0%,100%{transform:translateY(0)}
    50%{transform:translateY(-8px)}
}
/* Glow pulse behind each ring */
.holo-stat-ring::after{
    content:'';position:absolute;inset:-8px;
    border-radius:50%;
    background:radial-gradient(circle, currentColor, transparent 70%);
    opacity:0.06;
    animation:holoPulse 3s ease-in-out infinite;
}
.holo-stat-1 .holo-stat-ring{color:#3b82f6}
.holo-stat-2 .holo-stat-ring{color:#06b6d4}
.holo-stat-3 .holo-stat-ring{color:#7c3aed}
.holo-stat-4 .holo-stat-ring{color:#ec4899}
@keyframes holoPulse{
    0%,100%{opacity:0.04;transform:scale(1)}
    50%{opacity:0.12;transform:scale(1.15)}
}
@media(max-width:768px){
    .holo-dashboard{height:520px}
    .holo-stat-1{top:20px;left:5%}
    .holo-stat-2{top:20px;right:5%}
    .holo-stat-3{bottom:20px;left:5%}
    .holo-stat-4{bottom:20px;right:5%}
    .holo-stat-ring{width:65px;height:65px}
    .holo-stat-value{font-size:22px;width:65px}
    .holo-stat-label{font-size:10px}
}
@media(max-width:480px){
    .holo-dashboard{height:600px}
    .holo-stat-1{top:10px;left:10%;transform:none}
    .holo-stat-2{top:10px;right:10%}
    .holo-stat-3{bottom:10px;left:10%}
    .holo-stat-4{bottom:10px;right:10%}
}

/* ═══ TECH SPHERE ═══ */
#tech{
    overflow:hidden;
    background:
        radial-gradient(ellipse 80% 60% at 50% 50%, rgba(37,99,235,0.06) 0%, transparent 70%),
        linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px);
    background-size:100% 100%, 40px 40px, 40px 40px;
    border-top:1px solid rgba(59,130,246,0.06);
    border-bottom:1px solid rgba(59,130,246,0.06);
}
#tech .section-header{margin-bottom:20px}
.tech-sphere-wrap{
    position:relative;width:100%;max-width:550px;height:420px;margin:0 auto;
    touch-action:none;user-select:none;cursor:grab;
}
.tech-sphere-wrap::before{
    content:'';position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
    width:320px;height:320px;border-radius:50%;
    background:radial-gradient(circle,rgba(37,99,235,0.15) 0%,rgba(59,130,246,0.08) 35%,transparent 70%);
    filter:blur(20px);pointer-events:none;z-index:0;
    animation:sphereGlow 5s ease-in-out infinite alternate;
}
@keyframes sphereGlow{
    0%{opacity:.6;transform:translate(-50%,-50%) scale(1)}
    100%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}
}
.tech-sphere-wrap::after{
    content:'';position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
    width:220px;height:220px;border-radius:50%;
    border:1px solid rgba(59,130,246,0.1);
    box-shadow:0 0 40px rgba(37,99,235,0.04) inset;
    pointer-events:none;z-index:0;
}
.tech-sphere-wrap:active{cursor:grabbing}
.tech-sphere-scene{position:relative;width:100%;height:100%;perspective:900px;z-index:1}
.tech-node{
    position:absolute;left:50%;top:50%;
    width:56px;height:56px;
    margin:-28px 0 0 -28px;
    border-radius:50%;
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    cursor:pointer;
    transition:transform .1s linear, box-shadow .3s;
    will-change:transform;
    border:1.5px solid rgba(255,255,255,0.08);
    backdrop-filter:blur(6px);
    -webkit-backdrop-filter:blur(6px);
}
.tech-node:hover{box-shadow:0 0 20px var(--node-color, var(--accent)),0 0 40px rgba(37,99,235,0.1)}
.tech-node svg{width:26px;height:26px;flex-shrink:0}
.tech-node-label{
    position:absolute;bottom:-18px;left:50%;transform:translateX(-50%);
    font-size:9px;font-weight:600;color:var(--text-dim);white-space:nowrap;
    letter-spacing:0.5px;opacity:0;transition:opacity .3s;
    pointer-events:none;
}
.tech-node:hover .tech-node-label{opacity:1}
/* Popup */
.tech-popup{
    position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(0);
    background:rgba(6,11,24,0.95);
    border:1px solid rgba(59,130,246,0.15);
    border-radius:20px;padding:24px 20px;text-align:center;
    backdrop-filter:blur(30px);z-index:20;
    transition:transform .35s cubic-bezier(.34,1.56,.64,1), opacity .25s;
    opacity:0;pointer-events:none;min-width:200px;
    box-shadow:0 20px 60px rgba(0,0,0,0.5),0 0 20px rgba(37,99,235,0.06);
}
.tech-popup.show{transform:translate(-50%,-50%) scale(1);opacity:1;pointer-events:auto}
.tech-popup-icon{width:48px;height:48px;margin:0 auto 10px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:2px solid rgba(255,255,255,0.1)}
.tech-popup-icon svg{width:28px;height:28px}
.tech-popup-name{font-size:16px;font-weight:700;margin-bottom:6px;color:var(--text)}
.tech-popup-desc{font-size:12px;color:var(--text-dim);line-height:1.6}
@media(max-width:600px){
    #tech{padding:60px 16px}
    #tech .section-header{margin-bottom:10px}
    .tech-sphere-wrap{height:340px;max-width:100%}
    .tech-sphere-wrap::before{width:240px;height:240px}
    .tech-sphere-wrap::after{width:160px;height:160px}
    .tech-node{width:44px;height:44px;margin:-22px 0 0 -22px}
    .tech-node svg{width:20px;height:20px}
}

/* ═══ FAQ ═══ */
.faq-list{max-width:750px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px;overflow:hidden;backdrop-filter:blur(20px);transition:all .3s}
.faq-item:hover{border-color:rgba(167,139,250,0.2)}
.faq-q{padding:20px 24px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-weight:600;font-size:15px;transition:color .3s;user-select:none}
.faq-q:hover{color:var(--accent-light)}
.faq-q .arrow{font-size:18px;color:var(--accent);transition:transform .3s}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 20px}
.faq-a p{font-size:14px;color:var(--text-dim);line-height:1.8}

/* ═══ 3D PARTICLE TEXT ═══ */
.particle-text-section{
    width:100%;
    background:#000;
    overflow:hidden;
    position:relative;
}
#particleTextCanvas{
    width:100%;
    height:420px;
    display:block;
}
@media(max-width:768px){
    #particleTextCanvas{height:280px}
}
@media(max-width:480px){
    #particleTextCanvas{height:200px}
}

/* ═══ FOOTER ═══ */
.footer{background:var(--bg2);border-top:1px solid var(--card-border);padding:60px 24px 24px}
.footer-grid{max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand{margin-bottom:16px}
.footer-logo{height:48px;width:auto;display:block;filter:drop-shadow(0 0 10px rgba(37,99,235,0.3));transition:filter 0.3s}
.footer-logo:hover{filter:drop-shadow(0 0 18px rgba(37,99,235,0.5))}
.footer-about{font-size:14px;color:var(--text-dim);line-height:1.7}
.footer h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text);letter-spacing:1px;text-transform:uppercase}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px}
.footer ul a{color:var(--text-dim);text-decoration:none;font-size:13px;transition:color .3s}
.footer ul a:hover{color:var(--accent-light)}
/* Footer icons & socials */
.footer-icon{
    width:16px;height:16px;
    vertical-align:-3px;
    margin-right:6px;
    display:inline-block;
    opacity:0.6;
    transition:opacity 0.3s;
}
.footer-contact li a:hover .footer-icon{opacity:1}
.footer-socials{
    display:flex;gap:10px;margin-top:16px;
}
.social-btn{
    width:36px;height:36px;
    border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,0.05);
    border:1px solid rgba(255,255,255,0.08);
    color:var(--text-dim);
    transition:all 0.4s cubic-bezier(0.23,1,0.32,1);
}
.social-btn svg{width:18px;height:18px}
.social-btn:hover{transform:translateY(-3px)}
.social-fb:hover{
    background:rgba(24,119,242,0.15);border-color:rgba(24,119,242,0.3);
    color:#1877f2;box-shadow:0 8px 20px rgba(24,119,242,0.15);
}
.social-tt:hover{
    background:rgba(255,0,80,0.12);border-color:rgba(255,0,80,0.25);
    color:#ff0050;box-shadow:0 8px 20px rgba(255,0,80,0.12);
}
.social-zalo:hover{
    background:rgba(0,136,255,0.12);border-color:rgba(0,136,255,0.25);
    color:#0088ff;box-shadow:0 8px 20px rgba(0,136,255,0.12);
}
.footer-bottom{max-width:var(--max-w);margin:40px auto 0;padding-top:20px;border-top:1px solid var(--card-border);text-align:center;font-size:12px;color:var(--text-muted);letter-spacing:1px}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}

/* ═══ BACK TO TOP ═══ */
.back-top{position:fixed;bottom:30px;right:30px;z-index:999;width:48px;height:48px;border-radius:50%;background:var(--card-bg);border:1px solid var(--card-border);backdrop-filter:blur(20px);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(20px);transition:all .3s;color:var(--accent);font-size:18px}
.back-top.show{opacity:1;transform:translateY(0)}
.back-top:hover{border-color:var(--accent);box-shadow:0 0 20px var(--glow)}
.back-top>svg:first-child{width:20px;height:20px;position:relative;z-index:2}
.back-top-ring{position:absolute;top:50%;left:50%;width:52px;height:52px;transform:translate(-50%,-50%);border-radius:50%}

/* ═══ SCROLL REVEAL ═══ */
.reveal{opacity:0;transform:translateY(40px);transition:all .8s cubic-bezier(.16,1,.3,1)}
.reveal.active{opacity:1;transform:translateY(0)}
.reveal-left{opacity:0;transform:translateX(-40px);transition:all .8s cubic-bezier(.16,1,.3,1)}
.reveal-left.active{opacity:1;transform:translateX(0)}
.reveal-scale{opacity:0;transform:scale(0.9);transition:all .8s cubic-bezier(.16,1,.3,1)}
.reveal-scale.active{opacity:1;transform:scale(1)}

/* ═══ BACK-TOP POSITION OFFSET (for floating contact button) ═══ */
.back-top{right:100px}
@media(max-width:480px){
    .back-top{right:80px;bottom:20px;width:42px;height:42px}
    .back-top-ring{width:46px;height:46px}
}