/*
Theme Name: AI Kernel Bilingual
Theme URI: https://ai-kernel.com
Author: Artificial Intelligence Kernel Inc.
Description: Official bilingual (EN/FR) website theme for Artificial Intelligence Kernel Inc.
Version: 2.0.0
License: GNU General Public License v2 or later
Text Domain: ai-kernel
*/

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: #fff;
  color: #1a1a2e;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
:root {
  --blue: #1a56db;
  --blue-dark: #1341b0;
  --blue-light: #eff6ff;
  --blue-mid: #dbeafe;
  --text: #1a1a2e;
  --muted: #6b7280;
  --border: #e5e7eb;
  --section-bg: #f8faff;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(26,86,219,0.08);
  --shadow-lg: 0 12px 40px rgba(26,86,219,0.14);
  --transition: 0.25s ease;
}
.page { display: none; }
.page.active { display: block; animation: fadein 0.3s ease; }
@keyframes fadein { from { opacity:0; transform:translateY(8px); } to { opacity:1; } }

/* NAV */
nav {
  position: fixed; top:0; left:0; right:0; z-index:999;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  height: 68px; display:flex; align-items:center;
}
.nav-inner {
  max-width:1200px; margin:0 auto; padding:0 2rem;
  display:flex; align-items:center; justify-content:space-between; width:100%;
}
.nav-logo {
  display:flex; align-items:center; gap:10px;
  text-decoration:none; color:var(--text);
  font-weight:800; font-size:1.05rem; letter-spacing:-0.01em;
}
.logo-icon {
  width:36px; height:36px; border-radius:8px;
  background: linear-gradient(135deg,var(--blue),#3b82f6);
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-size:0.75rem; font-weight:800;
}
.nav-links { display:flex; list-style:none; gap:0; }
.nav-links a {
  display:block; padding:0 0.85rem; line-height:68px;
  font-size:0.85rem; font-weight:600; color:var(--muted);
  text-decoration:none; transition:color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color:var(--blue); }
.nav-right { display:flex; align-items:center; gap:0.75rem; }
.lang-toggle {
  display:flex; border:1.5px solid var(--border); border-radius:8px; overflow:hidden;
}
.lang-btn {
  padding:0.4rem 0.75rem; font-size:0.78rem; font-weight:700;
  background:none; border:none; cursor:pointer; color:var(--muted);
  transition:all var(--transition); letter-spacing:0.04em;
}
.lang-btn.active { background:var(--blue); color:#fff; }
.nav-cta {
  background:var(--blue); color:#fff;
  font-weight:700; font-size:0.85rem;
  padding:0.55rem 1.2rem; border-radius:8px;
  text-decoration:none; transition:background var(--transition); white-space:nowrap;
}
.nav-cta:hover { background:var(--blue-dark); }

/* LAYOUT */
.container { max-width:1200px; margin:0 auto; padding:0 2rem; }
section { padding:80px 0; }
.section-bg { background:var(--section-bg); }
.label {
  display:inline-block; background:var(--blue-light); color:var(--blue);
  font-size:0.78rem; font-weight:700; letter-spacing:0.08em;
  text-transform:uppercase; padding:0.35rem 0.9rem; border-radius:100px; margin-bottom:1rem;
}
h2.section-title {
  font-size:clamp(1.8rem,3.5vw,2.6rem); font-weight:800;
  line-height:1.15; letter-spacing:-0.02em; color:var(--text); margin-bottom:1rem;
}
.section-sub { font-size:1.05rem; color:var(--muted); line-height:1.7; max-width:580px; }

/* BUTTONS */
.btn {
  display:inline-flex; align-items:center; gap:7px;
  font-weight:700; font-size:0.925rem; padding:0.75rem 1.75rem;
  border-radius:8px; text-decoration:none;
  transition:all var(--transition); cursor:pointer; border:none;
}
.btn-blue { background:var(--blue); color:#fff; }
.btn-blue:hover { background:var(--blue-dark); transform:translateY(-1px); box-shadow:0 6px 20px rgba(26,86,219,0.3); }
.btn-outline { background:transparent; color:var(--blue); border:2px solid var(--blue); }
.btn-outline:hover { background:var(--blue-light); }
.btn-white { background:#fff; color:var(--blue); }
.btn-white:hover { background:#f0f7ff; }

/* HERO */
.hero { padding:140px 0 80px; background:linear-gradient(160deg,#f0f7ff 0%,#fff 60%); border-bottom:1px solid var(--border); }
.hero-inner { display:grid; grid-template-columns:1fr 1fr; gap:4rem; align-items:center; }
.hero-badge {
  display:inline-flex; align-items:center; gap:8px;
  background:#fff; border:1px solid var(--border); border-radius:100px;
  padding:0.35rem 1rem 0.35rem 0.5rem; font-size:0.8rem; font-weight:600; color:var(--text);
  margin-bottom:1.5rem; box-shadow:var(--shadow);
}
.hero-badge .dot { width:8px; height:8px; border-radius:50%; background:#22c55e; box-shadow:0 0 0 3px rgba(34,197,94,0.2); }
.hero h1 { font-size:clamp(2.2rem,5vw,3.5rem); font-weight:800; line-height:1.1; letter-spacing:-0.025em; margin-bottom:1.3rem; }
.hero h1 span { color:var(--blue); }
.hero-text { font-size:1.1rem; color:var(--muted); line-height:1.75; margin-bottom:2rem; }
.hero-actions { display:flex; gap:1rem; flex-wrap:wrap; margin-bottom:2.5rem; }
.hero-stats { display:flex; gap:2.5rem; padding-top:2rem; border-top:1px solid var(--border); flex-wrap:wrap; }
.hero-stat .num { font-size:1.7rem; font-weight:800; color:var(--text); line-height:1; }
.hero-stat .num em { font-style:normal; color:var(--blue); }
.hero-stat .lbl { font-size:0.8rem; color:var(--muted); margin-top:3px; }
.hero-img-placeholder {
  border-radius:16px; background:linear-gradient(135deg,#dbeafe,#eff6ff);
  border:1px solid var(--border); aspect-ratio:4/3;
  display:flex; align-items:center; justify-content:center; font-size:5rem; box-shadow:var(--shadow-lg);
}

/* TRUST */
.trust-strip { padding:40px 0; border-bottom:1px solid var(--border); }
.trust-label { text-align:center; font-size:0.8rem; font-weight:600; color:var(--muted); letter-spacing:0.06em; text-transform:uppercase; margin-bottom:1.5rem; }
.trust-logos { display:flex; gap:1rem; justify-content:center; flex-wrap:wrap; }
.trust-logo-pill { background:var(--section-bg); border:1px solid var(--border); border-radius:8px; padding:0.6rem 1.4rem; font-size:0.85rem; font-weight:700; color:var(--muted); }

/* SERVICE CARDS */
.services-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:1.5rem; }
.service-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:1.75rem; transition:all var(--transition); }
.service-card:hover { border-color:var(--blue); box-shadow:var(--shadow-lg); transform:translateY(-3px); }
.svc-icon { width:52px; height:52px; border-radius:12px; background:var(--blue-light); display:flex; align-items:center; justify-content:center; font-size:1.5rem; margin-bottom:1rem; }
.service-card h3 { font-size:1rem; font-weight:700; margin-bottom:0.5rem; }
.service-card p { font-size:0.875rem; color:var(--muted); line-height:1.65; }

/* INDUSTRY ALTERNATING */
.industry-block { display:grid; grid-template-columns:1fr 1fr; gap:5rem; align-items:center; padding:4rem 0; border-bottom:1px solid var(--border); }
.industry-block:last-child { border-bottom:none; }
.industry-block.reverse .industry-img { order:2; }
.industry-block.reverse .industry-text { order:1; }
.industry-img { border-radius:16px; overflow:hidden; border:1px solid var(--border); box-shadow:var(--shadow); }
.industry-img-box { background:linear-gradient(135deg,var(--blue-mid),var(--blue-light)); aspect-ratio:4/3; display:flex; align-items:center; justify-content:center; font-size:4.5rem; }
.industry-text h3 { font-size:1.6rem; font-weight:800; letter-spacing:-0.02em; margin-bottom:0.9rem; line-height:1.25; }
.industry-text p { color:var(--muted); line-height:1.75; margin-bottom:1rem; }
.feat-list { list-style:none; display:flex; flex-direction:column; gap:0.5rem; margin-top:1.2rem; }
.feat-list li { display:flex; align-items:flex-start; gap:10px; font-size:0.875rem; color:var(--muted); }
.feat-list li::before { content:''; min-width:18px; height:18px; border-radius:50%; background:var(--blue-light) url("data:image/svg+xml,%3Csvg width='10' height='8' viewBox='0 0 10 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 4l2.5 2.5L9 1' stroke='%231a56db' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center; flex-shrink:0; margin-top:1px; }

/* TABS */
.tab-buttons { display:flex; border-bottom:2px solid var(--border); margin-bottom:2.5rem; }
.tab-btn { padding:0.75rem 1.5rem; font-weight:700; font-size:0.9rem; color:var(--muted); cursor:pointer; border:none; background:none; border-bottom:2px solid transparent; margin-bottom:-2px; transition:all var(--transition); }
.tab-btn.active { color:var(--blue); border-bottom-color:var(--blue); }
.tab-pane { display:none; }
.tab-pane.active { display:grid; grid-template-columns:1fr 1fr; gap:3rem; align-items:start; }
.training-list { list-style:none; display:flex; flex-direction:column; gap:0.75rem; }
.training-list li { display:flex; align-items:flex-start; gap:10px; font-size:0.9rem; color:var(--muted); line-height:1.5; }
.training-list li::before { content:'→'; color:var(--blue); font-weight:700; flex-shrink:0; }
.training-img-box { border-radius:14px; background:linear-gradient(135deg,var(--blue-mid),var(--blue-light)); aspect-ratio:4/3; display:flex; align-items:center; justify-content:center; font-size:4rem; border:1px solid var(--border); }

/* TESTIMONIALS */
.testi-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:1.5rem; }
.testi-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:2rem; transition:all var(--transition); }
.testi-card:hover { box-shadow:var(--shadow-lg); border-color:#c7d7f5; transform:translateY(-2px); }
.stars { color:#f59e0b; font-size:0.9rem; margin-bottom:1rem; }
.testi-card blockquote { font-size:0.95rem; color:var(--text); line-height:1.75; margin-bottom:1.5rem; font-style:italic; }
.testi-author { display:flex; align-items:center; gap:12px; }
.testi-avatar { width:44px; height:44px; border-radius:50%; background:linear-gradient(135deg,var(--blue),#3b82f6); display:flex; align-items:center; justify-content:center; font-weight:800; font-size:0.9rem; color:#fff; flex-shrink:0; }
.testi-name { font-weight:700; font-size:0.9rem; }
.testi-role { font-size:0.78rem; color:var(--muted); }

/* CASE STUDIES */
.cases-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:1.5rem; }
.case-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; transition:all var(--transition); }
.case-card:hover { box-shadow:var(--shadow-lg); border-color:#c7d7f5; transform:translateY(-3px); }
.case-top { background:linear-gradient(135deg,#eff6ff,#dbeafe); padding:1.5rem; border-bottom:1px solid var(--border); display:flex; justify-content:space-between; align-items:flex-start; gap:1rem; }
.case-tag { background:var(--blue); color:#fff; font-size:0.72rem; font-weight:700; letter-spacing:0.08em; text-transform:uppercase; padding:0.25rem 0.75rem; border-radius:100px; white-space:nowrap; }
.case-top h3 { font-size:1.05rem; font-weight:700; line-height:1.35; }
.case-body { padding:1.5rem; }
.case-body p { font-size:0.875rem; color:var(--muted); line-height:1.65; margin-bottom:1.25rem; }
.case-metrics { display:flex; gap:1.5rem; flex-wrap:wrap; }
.metric .val { font-size:1.6rem; font-weight:800; color:var(--blue); line-height:1; }
.metric .lbl { font-size:0.73rem; color:var(--muted); margin-top:3px; }

/* ABOUT / TEAM */
.about-grid { display:grid; grid-template-columns:1fr 1fr; gap:5rem; align-items:center; }
.about-values { display:flex; flex-direction:column; gap:1.25rem; margin-top:2rem; }
.value-row { display:flex; gap:1rem; align-items:flex-start; padding:1rem; border-radius:10px; background:var(--section-bg); border:1px solid var(--border); }
.value-icon { width:40px; height:40px; border-radius:10px; background:var(--blue-light); display:flex; align-items:center; justify-content:center; font-size:1.1rem; flex-shrink:0; }
.value-row h4 { font-size:0.9rem; font-weight:700; margin-bottom:0.25rem; }
.value-row p { font-size:0.82rem; color:var(--muted); }
.team-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:1.25rem; }
.team-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:1.5rem; text-align:center; transition:all var(--transition); }
.team-card:hover { box-shadow:var(--shadow); border-color:#c7d7f5; }
.team-avatar { width:64px; height:64px; border-radius:50%; background:linear-gradient(135deg,var(--blue),#60a5fa); display:flex; align-items:center; justify-content:center; font-weight:800; font-size:1.2rem; color:#fff; margin:0 auto 0.9rem; }
.team-card h4 { font-size:0.95rem; font-weight:700; margin-bottom:0.2rem; }
.team-role { font-size:0.78rem; color:var(--blue); font-weight:600; margin-bottom:0.5rem; }
.team-bio { font-size:0.78rem; color:var(--muted); line-height:1.55; }

/* CONTACT */
.contact-grid { display:grid; grid-template-columns:1fr 1.5fr; gap:4rem; }
.contact-info-list { display:flex; flex-direction:column; gap:1.5rem; margin-top:1.5rem; }
.info-row { display:flex; gap:1rem; align-items:flex-start; }
.info-icon { width:44px; height:44px; border-radius:10px; background:var(--blue-light); display:flex; align-items:center; justify-content:center; font-size:1.1rem; flex-shrink:0; }
.info-row h4 { font-size:0.875rem; font-weight:700; margin-bottom:0.2rem; }
.info-row p, .info-row a { font-size:0.875rem; color:var(--muted); text-decoration:none; }
.contact-form-box { background:#fff; border:1px solid var(--border); border-radius:16px; padding:2.5rem; box-shadow:var(--shadow); }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.form-group { margin-bottom:1.1rem; }
.form-group label { display:block; font-size:0.78rem; font-weight:700; letter-spacing:0.05em; text-transform:uppercase; color:var(--text); margin-bottom:0.45rem; }
.form-group input, .form-group select, .form-group textarea { width:100%; padding:0.7rem 1rem; border:1.5px solid var(--border); border-radius:8px; font-family:inherit; font-size:0.9rem; color:var(--text); background:var(--section-bg); transition:border-color var(--transition); outline:none; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color:var(--blue); background:#fff; }
.form-group textarea { resize:vertical; min-height:110px; }

/* FAQ */
.faq-wrap { max-width:800px; margin:0 auto; }
.faq-item { border-bottom:1px solid var(--border); }
.faq-q { display:flex; justify-content:space-between; align-items:center; padding:1.3rem 0; cursor:pointer; font-weight:700; font-size:0.975rem; color:var(--text); transition:color var(--transition); }
.faq-q:hover { color:var(--blue); }
.faq-icon { width:28px; height:28px; border-radius:50%; background:var(--blue-light); color:var(--blue); display:flex; align-items:center; justify-content:center; font-size:1.1rem; font-weight:700; flex-shrink:0; transition:transform var(--transition); }
.faq-a { font-size:0.9rem; color:var(--muted); line-height:1.75; max-height:0; overflow:hidden; transition:max-height 0.35s ease, padding 0.2s; }
.faq-item.open .faq-a { max-height:250px; padding-bottom:1.2rem; }
.faq-item.open .faq-icon { transform:rotate(45deg); }

/* CTA BANNER */
.cta-banner { background:linear-gradient(135deg,var(--blue) 0%,#1e40af 100%); border-radius:20px; padding:4rem; text-align:center; color:#fff; }
.cta-banner h2 { font-size:2rem; font-weight:800; margin-bottom:0.75rem; }
.cta-banner p { color:rgba(255,255,255,0.8); margin-bottom:2rem; font-size:1.05rem; }

/* NUMBERS BAR */
.numbers-bar { display:grid; grid-template-columns:repeat(4,1fr); background:var(--blue); border-radius:16px; overflow:hidden; }
.number-cell { padding:2rem; text-align:center; border-right:1px solid rgba(255,255,255,0.15); }
.number-cell:last-child { border-right:none; }
.number-cell .n { font-size:2.2rem; font-weight:800; color:#fff; line-height:1; }
.number-cell .l { font-size:0.82rem; color:rgba(255,255,255,0.7); margin-top:5px; }

/* STEPS */
.steps-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:1.5rem; }
.step-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:1.75rem; }
.step-num { width:36px; height:36px; border-radius:50%; background:var(--blue); color:#fff; font-weight:800; font-size:0.9rem; display:flex; align-items:center; justify-content:center; margin-bottom:1rem; }
.step-card h4 { font-size:0.975rem; font-weight:700; margin-bottom:0.5rem; }
.step-card p { font-size:0.85rem; color:var(--muted); line-height:1.65; }

/* FOOTER */
footer { background:#0f172a; color:#fff; padding:60px 0 30px; border-top:3px solid var(--blue); }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1.3fr; gap:3rem; margin-bottom:3rem; }
.footer-brand p { font-size:0.85rem; color:#94a3b8; line-height:1.75; margin:1rem 0 1.5rem; max-width:280px; }
.footer-social { display:flex; gap:0.6rem; }
.footer-social a { width:36px; height:36px; border-radius:8px; border:1px solid #334155; display:flex; align-items:center; justify-content:center; color:#94a3b8; text-decoration:none; font-size:0.85rem; transition:all var(--transition); }
.footer-social a:hover { border-color:var(--blue); color:#fff; background:var(--blue); }
.footer-col h5 { font-size:0.82rem; font-weight:700; letter-spacing:0.08em; text-transform:uppercase; color:#fff; margin-bottom:1.25rem; }
.footer-col ul { list-style:none; display:flex; flex-direction:column; gap:0.6rem; }
.footer-col a { font-size:0.875rem; color:#94a3b8; text-decoration:none; transition:color var(--transition); }
.footer-col a:hover { color:#fff; }
.footer-contact p { display:flex; align-items:flex-start; gap:8px; font-size:0.875rem; color:#94a3b8; margin-bottom:0.7rem; line-height:1.5; }
.footer-contact span { flex-shrink:0; }
.footer-bottom { border-top:1px solid #1e293b; padding-top:1.75rem; display:flex; justify-content:space-between; align-items:center; }
.footer-bottom p { font-size:0.8rem; color:#64748b; }
.footer-logo { display:flex; align-items:center; gap:8px; text-decoration:none; }
.footer-logo .logo-icon { width:30px; height:30px; font-size:0.65rem; }
.footer-logo span { font-weight:800; font-size:0.95rem; color:#fff; }

/* RESPONSIVE */
@media (max-width:1024px) {
  .nav-links { display:none; }
  .hero-inner, .about-grid, .contact-grid { grid-template-columns:1fr; gap:2.5rem; }
  .hero-img-placeholder { display:none; }
  .services-grid { grid-template-columns:repeat(2,1fr); }
  .industry-block { grid-template-columns:1fr; gap:2rem; }
  .industry-block.reverse .industry-img, .industry-block.reverse .industry-text { order:unset; }
  .tab-pane.active { grid-template-columns:1fr; }
  .testi-grid, .cases-grid { grid-template-columns:1fr; }
  .numbers-bar { grid-template-columns:repeat(2,1fr); }
  .steps-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .team-grid { grid-template-columns:repeat(2,1fr); }
}
@media (max-width:640px) {
  section { padding:60px 0; }
  .services-grid { grid-template-columns:1fr; }
  .form-row { grid-template-columns:1fr; }
  .numbers-bar { grid-template-columns:1fr 1fr; }
  .steps-grid { grid-template-columns:1fr; }
  .cta-banner { padding:2.5rem 1.5rem; }
  .team-grid { grid-template-columns:repeat(2,1fr); }
  .nav-right { gap:0.5rem; }
  .lang-btn { padding:0.35rem 0.55rem; font-size:0.72rem; }
  .nav-cta { padding:0.5rem 0.9rem; font-size:0.8rem; }
}