/* ===================================================
   SATHVIK CONSTRUCTIONS — Premium Creative Portfolio
   Design DNA: Logo-driven · Architecture-inspired
   Palette: Olive-Gold #C9A84C · Charcoal #0A0A0A
   =================================================== */

/* ---------- TOKENS ---------- */
:root {
  --gold: #C9A84C;
  --gold-light: #E0C878;
  --gold-dark: #A88A2E;
  --gold-subtle: rgba(201,168,76,0.1);
  --gold-glow: rgba(201,168,76,0.25);
  --gold-glow-soft: rgba(201,168,76,0.08);

  --bg-deep: #080808;
  --bg-dark: #0F0F0F;
  --bg-mid: #161616;
  --bg-card: #1B1B1B;
  --bg-elevated: #222;
  --bg-hover: #282828;

  --text-primary: #F0EFE8;
  --text-body: #BFBCB4;
  --text-muted: #8A8780;
  --text-dim: #5A5855;

  --border-subtle: rgba(255,255,255,0.05);
  --border-gold: rgba(201,168,76,0.2);
  --border-gold-strong: rgba(201,168,76,0.4);

  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-accent: 'Cormorant Garamond', Georgia, serif;

  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --radius-xl: 28px;

  --ease-out: cubic-bezier(0.22,1,0.36,1);
  --ease-spring: cubic-bezier(0.34,1.56,0.64,1);

  --shadow-sm: 0 2px 12px rgba(0,0,0,0.4);
  --shadow-md: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
  --shadow-gold: 0 4px 30px rgba(201,168,76,0.15);

  --nav-h: 76px;
  --section-pad: 110px 0;
  --container: 1200px;
}

/* ---------- RESET ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-body);background:var(--bg-deep);color:var(--text-body);line-height:1.7;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button,input,textarea{font-family:inherit;border:none;outline:none;background:none;color:inherit}
::selection{background:var(--gold);color:var(--bg-deep)}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg-deep)}
::-webkit-scrollbar-thumb{background:#333;border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--gold-dark)}

/* ---------- UTILITY ---------- */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--section-pad)}
.section-head{text-align:center;margin-bottom:56px;max-width:660px;margin-left:auto;margin-right:auto}
.section-tag{display:inline-block;font-size:.7rem;font-weight:500;letter-spacing:3.5px;text-transform:uppercase;color:var(--gold);padding:6px 18px;border:1px solid var(--border-gold);border-radius:100px;margin-bottom:18px}
.section-title{font-family:var(--font-display);font-size:clamp(1.8rem,4vw,3rem);font-weight:700;color:var(--text-primary);line-height:1.15;margin-bottom:12px}
.section-sub{font-size:1rem;color:var(--text-muted);line-height:1.8}

/* ---------- BUTTONS ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;font-size:.88rem;font-weight:600;border-radius:var(--radius-sm);transition:all .4s var(--ease-out);position:relative;overflow:hidden}
.btn-primary{background:var(--gold);color:var(--bg-deep);border:1px solid var(--gold)}
.btn-primary:hover{background:var(--gold-light);border-color:var(--gold-light);transform:translateY(-2px);box-shadow:var(--shadow-gold)}
.btn-outline{background:transparent;color:var(--text-primary);border:1px solid rgba(255,255,255,.18)}
.btn-outline:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px)}
.btn-lg{padding:16px 38px;font-size:.95rem}

/* ---------- PRELOADER ---------- */
.preloader{position:fixed;inset:0;z-index:9999;background:var(--bg-deep);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;transition:opacity .5s,visibility .5s}
.preloader.hidden{opacity:0;visibility:pointer-events:none}
.preloader-ring{position:relative;width:50px;height:50px}
.preloader-ring div{position:absolute;inset:0;border:2px solid transparent;border-top-color:var(--gold);border-radius:50%;animation:spin .8s linear infinite}
.preloader-ring div:nth-child(2){inset:6px;border-top-color:var(--gold-dark);animation-duration:1s;animation-direction:reverse}
.preloader-ring div:nth-child(3){inset:12px;border-top-color:var(--gold-light);animation-duration:1.2s}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- NAV ---------- */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);transition:all .4s var(--ease-out)}
.navbar.scrolled{background:rgba(8,8,8,.88);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-subtle);height:64px}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:.82rem;font-weight:500;color:var(--text-muted);letter-spacing:.3px;transition:color .3s;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:1.5px;background:var(--gold);transition:width .35s var(--ease-out)}
.nav-links a:hover{color:var(--text-primary)}
.nav-links a:hover::after{width:100%}
.nav-cta{background:var(--gold);color:var(--bg-deep)!important;padding:8px 20px!important;border-radius:100px!important;font-weight:600!important}
.nav-cta::after{display:none!important}
.nav-cta:hover{background:var(--gold-light)!important;color:var(--bg-deep)!important}
.nav-hamburger{display:none;flex-direction:column;gap:6px;cursor:pointer;z-index:1001;padding:4px}
.nav-hamburger span{display:block;width:26px;height:2px;background:var(--text-primary);border-radius:2px;transition:all .3s var(--ease-out)}
.nav-hamburger.active span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-hamburger.active span:nth-child(2){opacity:0}
.nav-hamburger.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ---------- HERO ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden}
.hero-canvas{position:absolute;inset:0;pointer-events:none}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(201,168,76,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(201,168,76,.025) 1px,transparent 1px);background-size:60px 60px}
.hero-circle{position:absolute;top:50%;left:50%;width:600px;height:600px;transform:translate(-50%,-50%);border:1px solid var(--border-gold);border-radius:50%;opacity:.15}
.hero-circle--outer{width:800px;height:800px;border-style:dashed;opacity:.08}
.hero-line{position:absolute;background:var(--border-gold)}
.hero-line--h{top:50%;left:5%;right:5%;height:1px;opacity:.2}
.hero-line--v{left:50%;top:10%;bottom:10%;width:1px;opacity:.2}
.hero-dot{position:absolute;top:50%;left:50%;width:6px;height:6px;background:var(--gold);border-radius:50%;transform:translate(-50%,-50%);opacity:.5;box-shadow:0 0 20px var(--gold-glow)}
.hero-arc{position:absolute;top:50%;left:50%;width:900px;height:450px;transform:translate(-50%,-100%);border:1px solid var(--border-gold);border-radius:50%;opacity:.06;clip-path:inset(0 0 50% 0)}
.hero-arc--2{width:1100px;height:550px;border-style:dashed;opacity:.04}
.hero-content{position:relative;z-index:2;max-width:820px}
.hero-badge{display:inline-block;font-size:.72rem;font-weight:500;letter-spacing:2.5px;text-transform:uppercase;color:var(--gold);padding:7px 18px;border:1px solid var(--border-gold);border-radius:100px;margin-bottom:28px;opacity:0;animation:fadeUp .8s var(--ease-out) .3s forwards}
.hero-title{margin-bottom:20px}
.hero-line-1{display:block;font-family:var(--font-display);font-size:clamp(2.2rem,6.5vw,5rem);font-weight:700;color:var(--text-primary);line-height:1.1;opacity:0;animation:fadeUp .8s var(--ease-out) .5s forwards}
.hero-line-2{display:block;font-family:var(--font-display);font-size:clamp(2.2rem,6.5vw,5rem);font-weight:700;font-style:italic;color:var(--gold);line-height:1.15;opacity:0;animation:fadeUp .8s var(--ease-out) .7s forwards}
.hero-desc{font-size:clamp(.95rem,1.8vw,1.1rem);color:var(--text-muted);margin-bottom:36px;letter-spacing:.5px;opacity:0;animation:fadeUp .8s var(--ease-out) .9s forwards}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;opacity:0;animation:fadeUp .8s var(--ease-out) 1.1s forwards}
.hero-scroll{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--text-dim);font-size:.65rem;font-weight:500;letter-spacing:2px;text-transform:uppercase}
.scroll-line{width:1px;height:36px;background:linear-gradient(to bottom,var(--gold),transparent);animation:scrollPulse 2.5s ease-in-out infinite}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
@keyframes scrollPulse{0%,100%{opacity:.3;transform:scaleY(.5)} 50%{opacity:1;transform:scaleY(1)}}

/* ---------- ABOUT ---------- */
.about{background:var(--bg-dark);position:relative}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.about-visual{position:relative}
.about-frame{position:relative;border-radius:var(--radius-lg);overflow:hidden}
.about-img{width:100%;aspect-ratio:4/5;object-fit:cover;display:block;border-radius:var(--radius-lg);position:relative;z-index:1}
.about-frame-border{position:absolute;top:-12px;right:-12px;width:100%;height:100%;border:2px solid var(--border-gold-strong);border-radius:var(--radius-lg);z-index:0;opacity:.4}
.about-frame-corner{position:absolute;width:24px;height:24px;border-color:var(--gold);border-style:solid;z-index:2;opacity:.7}
.about-frame-corner--tl{top:8px;left:8px;border-width:2px 0 0 2px;border-radius:4px 0 0 0}
.about-frame-corner--tr{top:8px;right:8px;border-width:2px 2px 0 0;border-radius:0 4px 0 0}
.about-frame-corner--bl{bottom:8px;left:8px;border-width:0 0 2px 2px;border-radius:0 0 0 4px}
.about-frame-corner--br{bottom:8px;right:8px;border-width:0 2px 2px 0;border-radius:0 0 4px 0}
.about-badge{position:absolute;bottom:-16px;right:-8px;background:var(--gold);color:var(--bg-deep);padding:16px 24px;border-radius:var(--radius-md);text-align:center;z-index:3;box-shadow:var(--shadow-lg);font-size:.85rem;font-weight:600;line-height:1.3}
.about-badge strong{display:block;font-size:1.8rem;font-weight:700}
.about-content .section-title{margin-bottom:16px}
.about-content strong{color:var(--text-primary)}
.about-content em{color:var(--gold);font-style:italic}
.section-text{font-size:.95rem;color:var(--text-muted);line-height:1.8;margin-bottom:14px}
.about-creds{display:grid;gap:10px;margin:24px 0 32px}
.cred{display:flex;align-items:center;gap:10px;font-size:.88rem;color:var(--text-body)}
.cred-icon{color:var(--gold);font-size:.6rem}

/* ---------- SERVICES ---------- */
.services{background:var(--bg-mid);position:relative}
.services::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--border-gold),transparent)}
.services-track{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.service-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:36px 28px;transition:all .5s var(--ease-out);position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:0;transition:opacity .5s var(--ease-out)}
.service-card:hover{background:var(--bg-elevated);border-color:var(--border-gold);transform:translateY(-6px);box-shadow:var(--shadow-md)}
.service-card:hover::before{opacity:1}
.card-icon{width:60px;height:60px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-md);background:var(--gold-subtle);color:var(--gold);margin-bottom:20px;transition:all .4s var(--ease-out)}
.service-card:hover .card-icon{background:rgba(201,168,76,.2);box-shadow:0 0 30px var(--gold-glow)}
.card-icon svg{width:38px;height:38px}
.service-card h3{font-family:var(--font-display);font-size:1.3rem;font-weight:600;color:var(--text-primary);margin-bottom:10px}
.service-card p{font-size:.88rem;color:var(--text-muted);line-height:1.7}

/* ---------- STATS ---------- */
.stats{padding:80px 0;background:var(--bg-deep);border-top:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat{position:relative;padding:12px 0}
.stat-num{display:inline;font-family:var(--font-display);font-size:clamp(2.5rem,4vw,3.8rem);font-weight:700;color:var(--gold);line-height:1}
.stat-sym{font-family:var(--font-display);font-size:clamp(1.5rem,2.5vw,2.2rem);font-weight:700;color:var(--gold)}
.stat-lbl{display:block;font-size:.8rem;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase;margin-top:8px}

/* ---------- PROJECTS ---------- */
.projects{background:var(--bg-dark)}
.proj-filters{display:flex;justify-content:center;gap:8px;margin-bottom:40px;flex-wrap:wrap}
.f-btn{padding:9px 22px;font-size:.82rem;font-weight:500;color:var(--text-muted);border:1px solid var(--border-subtle);border-radius:100px;transition:all .35s var(--ease-out);letter-spacing:.3px;cursor:pointer}
.f-btn:hover{border-color:var(--border-gold);color:var(--gold)}
.f-btn.active{background:var(--gold);color:var(--bg-deep);border-color:var(--gold)}
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.proj-card{position:relative;border-radius:var(--radius-lg);overflow:hidden;cursor:pointer;aspect-ratio:10/7;background:#1C1C1C}
.proj-card svg{display:block;width:100%;height:100%;transition:transform .6s var(--ease-out)}
.proj-card:hover svg{transform:scale(1.06)}
.proj-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.92) 0%,rgba(0,0,0,.15) 60%,transparent 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:24px;opacity:0;transition:opacity .4s var(--ease-out)}
.proj-card:hover .proj-overlay{opacity:1}
.proj-overlay h3{font-family:var(--font-display);font-size:1.25rem;font-weight:600;color:var(--text-primary)}
.proj-overlay p{font-size:.82rem;color:var(--text-muted);margin-top:4px}

/* ---------- PROCESS ---------- */
.process{background:var(--bg-mid)}
.process-track{max-width:720px;margin:0 auto}
.p-step{display:flex;gap:28px;align-items:flex-start}
.p-num{font-family:var(--font-display);font-size:2.8rem;font-weight:700;color:var(--gold);line-height:1;min-width:70px;opacity:.4}
.p-body h3{font-family:var(--font-display);font-size:1.4rem;font-weight:600;color:var(--text-primary);margin-bottom:6px}
.p-body p{color:var(--text-muted);font-size:.92rem;line-height:1.7}
.p-line{width:1px;height:36px;background:var(--border-gold);margin-left:34px;margin-top:6px;margin-bottom:6px}

/* ---------- TESTIMONIALS ---------- */
.testimonials{background:var(--bg-dark)}
.carousel{position:relative;max-width:620px;margin:0 auto;overflow:hidden}
.carousel-track{display:flex;transition:transform .55s var(--ease-out)}
.t-card{min-width:100%;box-sizing:border-box;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:40px 36px}
.t-stars{color:var(--gold);font-size:1rem;letter-spacing:3px;margin-bottom:14px}
.t-card p{font-family:var(--font-accent);font-size:1.05rem;font-style:italic;color:var(--text-body);line-height:1.8;margin-bottom:20px}
.t-author{display:flex;flex-direction:column;gap:2px}
.t-author strong{font-size:.9rem;color:var(--text-primary);font-weight:600}
.t-author span{font-size:.8rem;color:var(--text-muted)}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:var(--bg-card);border:1px solid var(--border-subtle);color:var(--text-primary);font-size:1.1rem;cursor:pointer;transition:all .3s var(--ease-out);z-index:2;display:flex;align-items:center;justify-content:center}
.carousel-btn:hover{background:var(--gold);color:var(--bg-deep);border-color:var(--gold)}
.carousel-prev{left:-54px}
.carousel-next{right:-54px}
.carousel-dots{display:flex;justify-content:center;gap:8px;margin-top:28px}
.dot{width:10px;height:10px;border-radius:50%;background:var(--text-dim);border:none;cursor:pointer;transition:all .4s var(--ease-out)}
.dot.active{background:var(--gold);width:28px;border-radius:5px;box-shadow:0 0 12px var(--gold-glow)}

/* ---------- CTA ---------- */
.cta{padding:100px 0;background:var(--bg-deep);text-align:center;position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 50%,rgba(201,168,76,.04) 0%,transparent 50%),radial-gradient(circle at 70% 50%,rgba(201,168,76,.02) 0%,transparent 50%)}
.cta-inner{position:relative;z-index:1;max-width:640px;margin:0 auto}
.cta-title{font-family:var(--font-display);font-size:clamp(1.8rem,4vw,2.8rem);font-weight:700;color:var(--text-primary);margin-bottom:14px}
.cta-text{font-size:1.05rem;color:var(--text-muted);margin-bottom:32px;line-height:1.7}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- CONTACT ---------- */
.contact{background:var(--bg-mid)}
.contact-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:60px;align-items:start}
.contact-details{display:grid;gap:24px}
.c-item{display:flex;gap:16px;align-items:flex-start}
.c-item svg{width:22px;height:22px;flex-shrink:0;margin-top:4px;color:var(--gold)}
.c-item h4{font-size:.8rem;font-weight:600;color:var(--text-primary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}
.c-item p{font-size:.92rem;color:var(--text-muted);line-height:1.6}
.c-item a{color:var(--gold);transition:color .3s}
.c-item a:hover{color:var(--gold-light)}
.c-social{display:flex;gap:10px;margin-top:8px}
.c-social a{width:42px;height:42px;display:flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid var(--border-subtle);color:var(--text-muted);transition:all .3s var(--ease-out)}
.c-social a svg{width:18px;height:18px}
.c-social a:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-3px)}
.contact-form{display:grid;gap:18px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.f-group{position:relative}
.f-group input,.f-group textarea{width:100%;padding:16px 18px;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-size:.92rem;transition:all .3s var(--ease-out)}
.f-group textarea{resize:vertical;min-height:110px}
.f-group input:focus,.f-group textarea:focus{border-color:var(--border-gold-strong);box-shadow:0 0 0 3px var(--gold-subtle)}
.f-group label{position:absolute;left:18px;top:50%;transform:translateY(-50%);font-size:.88rem;color:var(--text-dim);pointer-events:none;transition:all .3s var(--ease-out);background:var(--bg-card);padding:0 4px}
.f-group textarea~label{top:18px;transform:none}
.f-group input:focus~label,.f-group textarea:focus~label,.f-group input:not(:placeholder-shown)~label,.f-group textarea:not(:placeholder-shown)~label{top:-10px;font-size:.72rem;color:var(--gold)}
.btn-submit{width:100%;justify-content:center;padding:16px}
.btn-submit span{transition:transform .3s var(--ease-out);display:inline-block}
.btn-submit:hover span{transform:translateX(4px)}

/* ---------- FOOTER ---------- */
.footer{background:var(--bg-deep);border-top:1px solid var(--border-subtle);padding:70px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:48px;padding-bottom:40px;border-bottom:1px solid var(--border-subtle)}
.footer-brand p{font-size:.88rem;color:var(--text-muted);margin-top:8px;line-height:1.7}
.footer-tagline{font-family:var(--font-accent);font-size:1rem!important;color:var(--gold)!important;font-style:italic!important}
.footer h4{font-family:var(--font-display);font-size:1rem;font-weight:600;color:var(--text-primary);margin-bottom:16px}
.footer-links ul{display:grid;gap:10px}
.footer-links a,.footer-contact a{color:var(--text-muted);font-size:.86rem;transition:color .3s}
.footer-links a:hover,.footer-contact a:hover{color:var(--gold)}
.footer-contact p{font-size:.86rem;color:var(--text-muted);line-height:1.7;margin-bottom:8px}
.footer-contact a{color:var(--text-muted)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:22px 0;font-size:.8rem;color:var(--text-dim)}

/* ---------- FLOATING WHATSAPP ---------- */
.wa-float{position:fixed;bottom:28px;left:28px;z-index:998;width:58px;height:58px;border-radius:50%;background:#25D366;color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 24px rgba(37,211,102,.35);transition:all .4s var(--ease-out);animation:waPulse 2.5s ease-in-out infinite}
.wa-float svg{width:26px;height:26px}
.wa-float:hover{transform:scale(1.1);background:#20BD5A;box-shadow:0 8px 40px rgba(37,211,102,.5);animation:none}
.wa-tip{position:absolute;left:68px;top:50%;transform:translateY(-50%);background:var(--bg-card);color:var(--text-primary);font-size:.78rem;font-weight:500;padding:8px 14px;border-radius:var(--radius-sm);white-space:nowrap;opacity:0;visibility:hidden;transition:all .3s var(--ease-out);border:1px solid var(--border-subtle);pointer-events:none}
.wa-float:hover .wa-tip{opacity:1;visibility:visible}
@keyframes waPulse{0%,100%{box-shadow:0 4px 24px rgba(37,211,102,.35)} 50%{box-shadow:0 4px 44px rgba(37,211,102,.55)}}

/* ---------- BACK TO TOP ---------- */
.btt{position:fixed;bottom:28px;right:28px;z-index:999;width:44px;height:44px;border-radius:50%;background:var(--gold);color:var(--bg-deep);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(16px);transition:all .4s var(--ease-out);cursor:pointer}
.btt svg{width:18px;height:18px}
.btt.visible{opacity:1;visibility:visible;transform:translateY(0)}
.btt:hover{background:var(--gold-light);transform:translateY(-4px);box-shadow:0 8px 32px var(--gold-glow)}

/* ---------- REVEAL ---------- */
[data-reveal]{opacity:0;transform:translateY(40px);transition:opacity .8s var(--ease-out),transform .8s var(--ease-out);transition-delay:var(--delay,0ms)}
[data-reveal].visible{opacity:1;transform:translateY(0)}

/* ---------- RESPONSIVE ---------- */
@media(max-width:1024px){
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:48px}
  .services-track{grid-template-columns:repeat(2,1fr)}
  .proj-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .carousel-btn{display:none}
  .about-visual{max-width:360px;margin:0 auto}
}
@media(max-width:768px){
  :root{--section-pad:70px 0;--nav-h:64px}
  .container{padding:0 16px}
  .nav-hamburger{display:flex}
  .nav-links{position:fixed;inset:0;background:rgba(8,8,8,.98);backdrop-filter:blur(24px);flex-direction:column;justify-content:center;gap:20px;opacity:0;visibility:hidden;transition:all .4s var(--ease-out)}
  .nav-links.active{opacity:1;visibility:visible}
  .nav-links a{font-size:1.3rem;font-weight:600}
  .hero-line-1,.hero-line-2{font-size:clamp(1.8rem,10vw,2.8rem)}
  .hero-actions,.cta-actions{flex-direction:column}
  .hero-actions .btn,.cta-actions .btn{width:100%;justify-content:center}
  .services-track{grid-template-columns:1fr}
  .proj-grid{grid-template-columns:1fr;max-width:420px;margin:0 auto}
  .proj-filters{gap:6px}
  .f-btn{padding:7px 14px;font-size:.78rem}
  .stats-grid{gap:16px}
  .stat-num{font-size:2.2rem}
  .p-step{flex-direction:column;gap:8px}
  .p-num{min-width:auto;font-size:2rem}
  .p-line{margin-left:0;height:24px}
  .contact-grid{gap:36px}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:6px;text-align:center}
  .about-frame{max-width:300px;margin:0 auto}
  .about-badge{position:relative;bottom:auto;right:auto;margin-top:-30px;width:fit-content;margin-left:auto}
  .wa-float{bottom:16px;left:16px;width:50px;height:50px}
  .wa-tip{display:none}
  .btt{bottom:16px;right:16px;width:40px;height:40px}
  .hero-scroll{display:none}
  .section-head{margin-bottom:36px}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .stat-num{font-size:1.8rem}
  .service-card{padding:28px 22px}
}