/* ══════════════════════════════════════════════
   NeolithAI Agency — Shared Styles v2.0
   Used across all pages
══════════════════════════════════════════════ */

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

:root{
  --bg:#f4f7fb;
  --bg2:#edf2f8;
  --surface:#ffffff;
  --accent:#1a6fc4;
  --accent2:#0e9e7a;
  --text:#1a2e42;
  --text2:#5b7a99;
  --border:#d0dce9;
  --shadow:0 2px 16px rgba(26,111,196,0.07);
  --shadow-lg:0 8px 32px rgba(26,111,196,0.12);
  --radius:12px;
  --radius-lg:20px;
}

html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'Segoe UI',system-ui,-apple-system,sans-serif;
  line-height:1.7;
  font-size:16px;
  padding-top:64px;
}

/* ── TYPOGRAPHY ── */
h1{font-size:clamp(2rem,4vw,3.2rem);font-weight:700;line-height:1.2;color:var(--text);}
h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:700;line-height:1.3;color:var(--text);}
h3{font-size:1.1rem;font-weight:600;color:var(--text);}
h1 .accent{color:var(--accent);}
h2 .accent{color:var(--accent);}
p{color:var(--text2);line-height:1.75;}

.section-label{
  font-size:11px;font-weight:700;letter-spacing:2.5px;
  text-transform:uppercase;color:var(--accent2);margin-bottom:.5rem;
  display:block;
}
.section-title{margin-bottom:3rem;}

/* ── LAYOUT ── */
section{padding:5rem 2rem;}
.container{max-width:1100px;margin:0 auto;}

/* ── BUTTONS ── */
.btn-primary{
  background:var(--accent);color:#fff;border:none;
  padding:13px 28px;border-radius:8px;font-size:15px;font-weight:600;
  cursor:pointer;text-decoration:none;transition:all .2s;display:inline-block;
  letter-spacing:.2px;
}
.btn-primary:hover{background:#155da0;transform:translateY(-2px);box-shadow:0 6px 20px rgba(26,111,196,0.3);}

.btn-outline{
  background:transparent;color:var(--accent);
  border:2px solid var(--accent);padding:11px 28px;border-radius:8px;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:all .2s;display:inline-block;
}
.btn-outline:hover{background:var(--accent);color:#fff;transform:translateY(-2px);}

.btn-teal{
  background:var(--accent2);color:#fff;border:none;
  padding:13px 28px;border-radius:8px;font-size:15px;font-weight:600;
  cursor:pointer;text-decoration:none;transition:all .2s;display:inline-block;
}
.btn-teal:hover{background:#0b8a6a;transform:translateY(-2px);box-shadow:0 6px 20px rgba(14,158,122,0.3);}

.btn-group{display:flex;gap:12px;flex-wrap:wrap;align-items:center;}

/* ── NAV ── */
nav{
  position:fixed;top:0;left:0;right:0;z-index:200;
  background:rgba(244,247,251,0.93);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);padding:0 2rem;
  transition:box-shadow .3s,background .3s;
}
nav.scrolled{box-shadow:0 2px 24px rgba(26,111,196,0.1);}
.nav-inner{
  max-width:1100px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;height:64px;
}

/* Logo */
.logo-wrap{display:flex;align-items:center;gap:10px;text-decoration:none;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-name{font-size:15px;font-weight:700;color:var(--text);letter-spacing:-.3px;}
.logo-name .ai{color:var(--accent2);}
.logo-sub{font-size:8.5px;font-weight:700;letter-spacing:3.5px;text-transform:uppercase;color:var(--text2);text-align:center;}

/* Nav links */
.nav-links{display:flex;gap:0;list-style:none;align-items:center;}
.nav-links a{
  color:var(--text2);text-decoration:none;font-size:14px;font-weight:500;
  padding:6px 14px;border-radius:6px;transition:all .2s;position:relative;
}
.nav-links a:hover{color:var(--accent);background:rgba(26,111,196,0.06);}
.nav-links a.active{color:var(--accent);background:rgba(26,111,196,0.08);}

/* Nav CTA */
.nav-cta{
  background:var(--accent);color:#fff !important;
  padding:8px 18px !important;border-radius:8px !important;
  font-weight:600 !important;margin-left:8px;
  transition:all .2s !important;
}
.nav-cta:hover{background:#155da0 !important;transform:translateY(-1px);box-shadow:0 4px 12px rgba(26,111,196,0.3);}

/* Lang switcher */
.nav-right{display:flex;align-items:center;gap:8px;}
.lang-switcher{display:flex;gap:4px;}
.lang-btn{
  background:none;border:1px solid var(--border);color:var(--text2);
  padding:4px 9px;border-radius:6px;font-size:11px;font-weight:600;
  cursor:pointer;transition:all .2s;letter-spacing:.5px;
}
.lang-btn.active,.lang-btn:hover{border-color:var(--accent);color:var(--accent);background:#e8f1fb;}

/* Burger */
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;border:none;background:none;}
.burger span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .3s;}

/* Mobile menu */
.mobile-menu{
  display:none;position:fixed;top:64px;left:0;right:0;
  background:var(--surface);border-bottom:1px solid var(--border);
  padding:1rem 2rem 1.5rem;z-index:199;
  box-shadow:0 8px 24px rgba(26,111,196,0.1);
}
.mobile-menu a{
  display:block;padding:12px 0;color:var(--text2);text-decoration:none;
  font-size:15px;font-weight:500;border-bottom:1px solid var(--border);
  transition:color .2s;
}
.mobile-menu a:last-child{border-bottom:none;}
.mobile-menu a:hover{color:var(--accent);}
.mobile-menu.open{display:block;}
.mobile-cta-wrap{margin-top:1rem;}

/* ── FOOTER ── */
footer{
  background:var(--text);color:rgba(255,255,255,0.7);
  padding:3rem 2rem 2rem;border-top:1px solid rgba(255,255,255,0.05);
}
.footer-inner{max-width:1100px;margin:0 auto;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:3rem;margin-bottom:3rem;
}
.footer-brand .logo-name{color:#fff;font-size:16px;}
.footer-brand .logo-name .ai{color:var(--accent2);}
.footer-brand .logo-sub{color:rgba(255,255,255,0.4);}
.footer-tagline{font-size:13px;color:rgba(255,255,255,0.5);margin-top:12px;line-height:1.6;max-width:220px;}
.footer-col h4{font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,0.4);margin-bottom:1rem;}
.footer-col a{display:block;color:rgba(255,255,255,0.6);text-decoration:none;font-size:14px;margin-bottom:8px;transition:color .2s;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);padding-top:1.5rem;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;
}
.footer-copy{font-size:13px;color:rgba(255,255,255,0.35);}
.footer-social{display:flex;gap:12px;}
.footer-social a{
  width:36px;height:36px;border-radius:8px;border:1px solid rgba(255,255,255,0.1);
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,0.45);
  text-decoration:none;transition:all .2s;
}
.footer-social a svg{width:16px;height:16px;fill:currentColor;transition:fill .2s;}
.footer-social a:hover{border-color:var(--accent2);color:var(--accent2);background:rgba(14,158,122,0.1);}
.footer-social a[aria-label="LinkedIn"]:hover{border-color:#0077b5;color:#0077b5;background:rgba(0,119,181,0.1);}
.footer-social a[aria-label="GitHub"]:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,0.08);}
.footer-social a[aria-label="Upwork"]:hover{border-color:#6fda44;color:#6fda44;background:rgba(111,218,68,0.1);}
.footer-social a[aria-label="Facebook"]:hover{border-color:#1877f2;color:#1877f2;background:rgba(24,119,242,0.1);}

/* ── SCROLL REVEAL ── */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .65s ease,transform .65s 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;}
.reveal-delay-4{transition-delay:.4s;}
.reveal-delay-5{transition-delay:.5s;}

/* ── CARDS ── */
.card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.75rem;
  transition:border-color .2s,transform .25s,box-shadow .25s;
}
.card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow-lg);}

/* ── PHILOSOPHY STRIP ── */
.philosophy-strip{
  background:var(--text);padding:3rem 2rem;
  border-top:1px solid rgba(255,255,255,0.05);
  border-bottom:1px solid rgba(255,255,255,0.05);
}
.philosophy-grid{
  max-width:1100px;margin:0 auto;
  display:grid;grid-template-columns:repeat(3,1fr);gap:2.5rem;
}
.phil-item{display:flex;flex-direction:column;gap:10px;}
.phil-num{font-size:11px;font-weight:700;letter-spacing:2px;color:var(--accent2);text-transform:uppercase;}
.phil-text{font-size:.975rem;font-weight:500;color:rgba(255,255,255,0.85);line-height:1.55;}

/* ── NEWSLETTER STRIP ── */
.newsletter-strip{
  background:linear-gradient(135deg,#1a2e42 0%,#1a6fc4 100%);
  padding:4rem 2rem;text-align:center;
}
.newsletter-strip h2{color:#fff;margin-bottom:.75rem;}
.newsletter-strip p{color:rgba(255,255,255,0.7);max-width:480px;margin:0 auto 2rem;}
.newsletter-form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;max-width:480px;margin:0 auto;}
.newsletter-input{
  flex:1;min-width:220px;background:rgba(255,255,255,0.12);
  border:1px solid rgba(255,255,255,0.25);border-radius:8px;
  padding:12px 16px;color:#fff;font-size:15px;font-family:inherit;outline:none;
  transition:border-color .2s;
}
.newsletter-input::placeholder{color:rgba(255,255,255,0.45);}
.newsletter-input:focus{border-color:var(--accent2);}
.newsletter-btn{
  background:var(--accent2);color:#fff;border:none;
  padding:12px 24px;border-radius:8px;font-size:15px;font-weight:600;
  cursor:pointer;transition:all .2s;white-space:nowrap;
}
.newsletter-btn:hover{background:#0b8a6a;transform:translateY(-1px);}
.newsletter-success{
  display:none;color:var(--accent2);font-weight:600;
  font-size:15px;margin-top:1rem;
}

/* ── PAGE HERO (inner pages) ── */
.page-hero{
  background:linear-gradient(135deg,#e8f1fb 0%,#f4f7fb 60%,#eaf5f0 100%);
  padding:5rem 2rem 4rem;border-bottom:1px solid var(--border);
  text-align:center;
}
.page-hero h1{margin-bottom:1rem;}
.page-hero p{font-size:1.1rem;max-width:600px;margin:0 auto;}

/* ── BADGE ── */
.badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--surface);border:1px solid var(--border);
  border-radius:20px;padding:6px 16px;font-size:13px;color:var(--text2);
  box-shadow:var(--shadow);margin-bottom:1.5rem;
}
.badge-dot{
  width:8px;height:8px;border-radius:50%;background:var(--accent2);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.5;transform:scale(.8);}}

/* ── AI CHAT WIDGET ── */
.ai-widget-btn{
  position:fixed;bottom:28px;right:28px;z-index:300;
  width:58px;height:58px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  border:none;cursor:pointer;box-shadow:0 4px 20px rgba(26,111,196,0.4);
  display:flex;align-items:center;justify-content:center;
  transition:transform .2s,box-shadow .2s;
}
.ai-widget-btn:hover{transform:scale(1.08);box-shadow:0 6px 28px rgba(26,111,196,0.5);}
.ai-widget-btn svg{width:26px;height:26px;fill:white;}
.ai-widget-pulse{
  position:absolute;top:-3px;right:-3px;width:14px;height:14px;
  border-radius:50%;background:var(--accent2);border:2px solid white;
  animation:pulse 2s infinite;
}
.ai-chat-panel{
  position:fixed;bottom:98px;right:28px;z-index:300;
  width:360px;max-height:520px;background:var(--surface);
  border-radius:var(--radius-lg);box-shadow:0 20px 60px rgba(26,111,196,0.2);
  border:1px solid var(--border);display:none;flex-direction:column;
  overflow:hidden;animation:slideUp .3s ease;
}
.ai-chat-panel.open{display:flex;}
@keyframes slideUp{from{opacity:0;transform:translateY(16px);}to{opacity:1;transform:translateY(0);}}
.ai-chat-header{
  background:linear-gradient(135deg,var(--accent),#1558a8);
  padding:16px 20px;display:flex;align-items:center;gap:12px;
}
.ai-chat-avatar{
  width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,0.2);
  display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;
}
.ai-chat-header-info{flex:1;}
.ai-chat-name{font-size:14px;font-weight:700;color:#fff;}
.ai-chat-status{font-size:12px;color:rgba(255,255,255,0.7);}
.ai-chat-close{background:none;border:none;color:rgba(255,255,255,0.7);cursor:pointer;font-size:20px;padding:0 4px;transition:color .2s;}
.ai-chat-close:hover{color:#fff;}
.ai-chat-messages{
  flex:1;overflow-y:auto;padding:16px;
  display:flex;flex-direction:column;gap:12px;
  max-height:340px;
}
.ai-chat-messages::-webkit-scrollbar{width:4px;}
.ai-chat-messages::-webkit-scrollbar-track{background:transparent;}
.ai-chat-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}
.msg{max-width:85%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.55;}
.msg-bot{background:var(--bg2);color:var(--text);border-radius:4px 14px 14px 14px;align-self:flex-start;}
.msg-user{background:var(--accent);color:#fff;border-radius:14px 4px 14px 14px;align-self:flex-end;}
.msg-typing{background:var(--bg2);padding:12px 16px;border-radius:4px 14px 14px 14px;align-self:flex-start;}
.typing-dots{display:flex;gap:5px;align-items:center;}
.typing-dots span{width:7px;height:7px;border-radius:50%;background:var(--text2);animation:typingBounce 1.2s infinite;}
.typing-dots span:nth-child(2){animation-delay:.2s;}
.typing-dots span:nth-child(3){animation-delay:.4s;}
@keyframes typingBounce{0%,60%,100%{transform:translateY(0);}30%{transform:translateY(-6px);}}
.ai-chat-input-row{
  padding:12px 16px;border-top:1px solid var(--border);
  display:flex;gap:8px;align-items:center;
}
.ai-chat-input{
  flex:1;border:1px solid var(--border);border-radius:8px;
  padding:10px 14px;font-size:14px;font-family:inherit;outline:none;
  color:var(--text);background:var(--bg);transition:border-color .2s;
  resize:none;
}
.ai-chat-input:focus{border-color:var(--accent);}
.ai-chat-send{
  background:var(--accent);border:none;border-radius:8px;
  width:38px;height:38px;cursor:pointer;display:flex;
  align-items:center;justify-content:center;transition:background .2s;flex-shrink:0;
}
.ai-chat-send:hover{background:#155da0;}
.ai-chat-send svg{width:18px;height:18px;fill:white;}
.ai-chat-suggestions{
  padding:0 16px 12px;display:flex;flex-wrap:wrap;gap:6px;
}
.ai-suggestion{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:20px;padding:5px 12px;font-size:12px;
  color:var(--accent);cursor:pointer;transition:all .2s;white-space:nowrap;
}
.ai-suggestion:hover{background:var(--accent);color:#fff;border-color:var(--accent);}

/* ── LANG ── */
[data-lang]{display:none;}
[data-lang].active{display:block;}
span[data-lang]{display:none;}
span[data-lang].active{display:inline;}

/* ── RESPONSIVE ── */
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .philosophy-grid{grid-template-columns:1fr;}
}
@media(max-width:760px){
  .nav-links{display:none;}
  .burger{display:flex;}
  section{padding:4rem 1.5rem;}
  .ai-chat-panel{width:calc(100vw - 32px);right:16px;}
  .footer-grid{grid-template-columns:1fr;}
}