/* ═══════════════════════════════════════════════
   AI KNOWLEDGE BASE — Shared Stylesheet
   aiknowledgebase.co.uk
   Design: Navy #1B3A5C · Gold #C9A84C
═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Syne:wght@600;700;800&family=DM+Sans:wght@300;400;500&family=DM+Mono:wght@400;500&display=swap');

:root {
  --navy:       #1B3A5C;
  --navy-deep:  #0f2338;
  --navy-mid:   #1e4a72;
  --navy-light: #254d76;
  --gold:       #C9A84C;
  --gold-light: #e0c070;
  --gold-pale:  #f5e9c8;
  --gold-dim:   #8a6f2e;
  --white:      #ffffff;
  --off-white:  #f8f6f1;
  --text-dark:  #1a1a2e;
  --text-mid:   #4a5568;
  --text-light: #718096;
  --border:     #d4c5a0;
  --border-lt:  #e8e0d0;
  --surface:    #faf8f4;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'DM Sans', sans-serif; background: #fff; color: var(--text-dark); overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; }

/* ── UTILITY ── */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.section    { padding: 80px 0; }
.section.bg-surface { background: var(--surface); }
.section.bg-navy    { background: var(--navy-deep); }

.gold-line        { width: 48px; height: 3px; background: var(--gold); margin-bottom: 18px; }
.gold-line.center { margin-left: auto; margin-right: auto; }

.section-eyebrow { font-family:'DM Mono',monospace; font-size:10px; letter-spacing:3px; text-transform:uppercase; color:var(--gold); display:block; margin-bottom:10px; }
.section-title   { font-family:'Syne',sans-serif; font-size:clamp(26px,4vw,42px); font-weight:800; line-height:1.1; color:var(--navy-deep); }
.section-sub     { font-size:16px; color:var(--text-mid); line-height:1.75; max-width:560px; margin-top:12px; }
.section-header  { margin-bottom:48px; }
.section-header.centered { text-align:center; }
.section-header.centered .section-sub { margin-left:auto; margin-right:auto; }

.tag { display:inline-block; font-family:'DM Mono',monospace; font-size:10px; letter-spacing:2px; text-transform:uppercase; padding:4px 12px; border:1px solid var(--gold); color:var(--gold); border-radius:2px; }
.tag.solid { background:var(--gold); color:var(--navy-deep); }

.btn { display:inline-flex; align-items:center; gap:8px; font-family:'DM Sans',sans-serif; font-size:14px; font-weight:500; padding:13px 28px; border-radius:3px; cursor:pointer; transition:all .25s; border:none; text-decoration:none; }
.btn-gold    { background:var(--gold); color:var(--navy-deep); }
.btn-gold:hover    { background:var(--gold-light); transform:translateY(-1px); box-shadow:0 6px 20px rgba(201,168,76,.35); }
.btn-navy    { background:var(--navy); color:#fff; }
.btn-navy:hover    { background:var(--navy-mid); transform:translateY(-1px); }
.btn-outline { background:transparent; color:#fff; border:1px solid rgba(255,255,255,.4); }
.btn-outline:hover { border-color:var(--gold); color:var(--gold); }
.btn-outline-navy { background:transparent; color:var(--navy); border:1px solid var(--navy); }
.btn-outline-navy:hover { background:var(--navy); color:#fff; }
.btn-sm { padding:9px 20px; font-size:13px; }

/* ── CARDS ── */
.card { background:#fff; border:1px solid var(--border-lt); border-radius:8px; overflow:hidden; transition:all .3s; }
.card:hover { transform:translateY(-4px); box-shadow:0 16px 48px rgba(27,58,92,.12); border-color:var(--gold); }
.card.featured { border-color:var(--gold); box-shadow:0 8px 32px rgba(201,168,76,.12); }
.card-thumb { height:180px; background:linear-gradient(135deg,var(--navy) 0%,var(--navy-mid) 100%); display:flex; align-items:center; justify-content:center; position:relative; overflow:hidden; }
.card-thumb-grid { position:absolute; inset:0; opacity:.12; background-image:linear-gradient(rgba(201,168,76,.8) 1px,transparent 1px),linear-gradient(90deg,rgba(201,168,76,.8) 1px,transparent 1px); background-size:28px 28px; }
.card-thumb-icon { font-size:42px; position:relative; z-index:1; }
.card-badge { position:absolute; top:12px; left:12px; z-index:2; font-family:'DM Mono',monospace; font-size:9px; letter-spacing:1.5px; text-transform:uppercase; padding:4px 8px; border-radius:2px; background:var(--gold); color:var(--navy-deep); }
.card-body { padding:20px 22px; display:flex; flex-direction:column; flex:1; }
.card-cat { font-family:'DM Mono',monospace; font-size:10px; letter-spacing:2px; text-transform:uppercase; color:var(--gold); margin-bottom:7px; }
.card-title { font-family:'Syne',sans-serif; font-size:17px; font-weight:700; color:var(--navy-deep); margin-bottom:8px; line-height:1.3; }
.card-desc { font-size:13px; color:var(--text-mid); line-height:1.65; margin-bottom:16px; flex:1; }
.card-footer { display:flex; align-items:center; justify-content:space-between; padding-top:14px; border-top:1px solid var(--border-lt); }
.card-price { font-family:'Syne',sans-serif; font-size:19px; font-weight:800; color:var(--navy-deep); }

/* ── STARS ── */
.stars { display:flex; gap:3px; }
.star  { color:var(--gold); font-size:13px; }

/* ── GRID LAYOUTS ── */
.grid-2 { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.grid-4 { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }

/* ── NAV ── */
#nav {
  position:fixed; top:0; left:0; right:0; z-index:999;
  background:rgba(11,27,45,.96); backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(201,168,76,.15);
  transition:box-shadow .3s;
}
.nav-inner { max-width:1160px; margin:0 auto; padding:0 24px; display:flex; align-items:center; height:66px; gap:0; }
.nav-brand { display:flex; align-items:center; gap:11px; text-decoration:none; margin-right:auto; }
.nav-brand-icon { width:34px; height:34px; background:linear-gradient(135deg,var(--gold),var(--gold-dim)); border-radius:5px; display:flex; align-items:center; justify-content:center; font-family:'Syne',sans-serif; font-size:13px; font-weight:800; color:var(--navy-deep); flex-shrink:0; }
.nav-brand-name { font-family:'Syne',sans-serif; font-size:14px; font-weight:800; color:#fff; letter-spacing:-.2px; }
.nav-brand-name span { color:var(--gold); }
.nav-links { display:flex; align-items:center; gap:2px; }
.nav-link { font-size:13px; color:rgba(255,255,255,.65); padding:8px 13px; border-radius:3px; transition:all .2s; font-weight:400; }
.nav-link:hover, .nav-link.active { color:#fff; background:rgba(255,255,255,.07); }
.nav-cta { margin-left:14px; }
.hamburger { display:none; background:none; border:none; cursor:pointer; color:#fff; font-size:22px; padding:6px; }

/* ── MOBILE NAV ── */
#mobile-nav { display:none; position:fixed; inset:0; z-index:998; background:var(--navy-deep); padding:88px 28px 40px; flex-direction:column; gap:6px; }
#mobile-nav.open { display:flex; }
.mobile-link { font-family:'Syne',sans-serif; font-size:20px; font-weight:700; color:rgba(255,255,255,.7); padding:12px 0; border-bottom:1px solid rgba(255,255,255,.07); }
.mobile-link:hover { color:var(--gold); }

/* ── PAGE HERO (inner pages) ── */
.page-hero { background:var(--navy-deep); background-image:linear-gradient(160deg,#0a1a2e 0%,#1B3A5C 60%,#0f2338 100%); padding:120px 0 64px; position:relative; overflow:hidden; }
.page-hero::after { content:''; position:absolute; right:0; top:0; bottom:0; width:40%; background-image:linear-gradient(rgba(201,168,76,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(201,168,76,.05) 1px,transparent 1px); background-size:50px 50px; mask-image:linear-gradient(to left,rgba(0,0,0,.6),transparent); }
.page-hero-title { font-family:'Syne',sans-serif; font-size:clamp(32px,5vw,56px); font-weight:800; color:#fff; line-height:1.05; margin-bottom:14px; }
.page-hero-sub { font-size:17px; color:rgba(255,255,255,.6); line-height:1.75; max-width:520px; font-weight:300; }

/* ── FOOTER ── */
footer { background:var(--navy-deep); border-top:1px solid rgba(201,168,76,.15); padding:60px 0 28px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:44px; margin-bottom:44px; }
.footer-brand { font-family:'Syne',sans-serif; font-size:18px; font-weight:800; color:#fff; margin-bottom:4px; }
.footer-brand span { color:var(--gold); }
.footer-tagline { font-family:'Cormorant Garamond',serif; font-size:14px; color:var(--gold); font-style:italic; margin-bottom:12px; }
.footer-desc { font-size:13px; color:rgba(255,255,255,.38); line-height:1.7; margin-bottom:18px; }
.footer-socials { display:flex; gap:8px; }
.social-icon { width:32px; height:32px; border-radius:4px; border:1px solid rgba(255,255,255,.1); display:flex; align-items:center; justify-content:center; color:rgba(255,255,255,.35); font-size:13px; transition:all .2s; }
.social-icon:hover { border-color:var(--gold); color:var(--gold); }
.footer-col-title { font-family:'Syne',sans-serif; font-size:12px; font-weight:700; color:#fff; margin-bottom:14px; letter-spacing:.3px; }
.footer-links { display:flex; flex-direction:column; gap:8px; }
.footer-link { font-size:13px; color:rgba(255,255,255,.38); transition:color .2s; }
.footer-link:hover { color:var(--gold); }
.footer-bottom { padding-top:24px; border-top:1px solid rgba(255,255,255,.06); display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; }
.footer-copy { font-size:11px; color:rgba(255,255,255,.22); font-family:'DM Mono',monospace; }
.footer-cert { font-size:11px; color:rgba(255,255,255,.22); font-family:'DM Mono',monospace; display:flex; align-items:center; gap:6px; }
.footer-cert::before { content:''; width:5px; height:5px; border-radius:50%; background:var(--gold); display:inline-block; }

/* ── CHATBOT ── */
#chatbot { position:fixed; bottom:24px; right:24px; z-index:900; }
#chat-toggle { width:54px; height:54px; border-radius:50%; background:var(--gold); border:none; cursor:pointer; font-size:22px; box-shadow:0 4px 18px rgba(201,168,76,.45); transition:all .3s; display:flex; align-items:center; justify-content:center; }
#chat-toggle:hover { transform:scale(1.08); }
#chat-window { position:absolute; bottom:66px; right:0; width:330px; background:#fff; border:1px solid var(--border-lt); border-radius:12px; box-shadow:0 20px 60px rgba(0,0,0,.16); display:none; overflow:hidden; }
#chat-window.open { display:block; animation:slideUp .28s ease; }
@keyframes slideUp { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
.chat-head { background:var(--navy-deep); padding:14px 18px; display:flex; align-items:center; gap:10px; }
.chat-head-avatar { width:34px; height:34px; border-radius:50%; background:var(--gold); display:flex; align-items:center; justify-content:center; font-size:15px; flex-shrink:0; }
.chat-head-name { font-family:'Syne',sans-serif; font-size:13px; font-weight:700; color:#fff; }
.chat-head-status { font-size:10px; color:rgba(255,255,255,.4); font-family:'DM Mono',monospace; }
#chat-close { margin-left:auto; background:none; border:none; color:rgba(255,255,255,.4); cursor:pointer; font-size:17px; }
#chat-msgs { height:220px; overflow-y:auto; padding:14px; display:flex; flex-direction:column; gap:9px; }
.msg { max-width:85%; padding:9px 12px; border-radius:10px; font-size:13px; line-height:1.5; }
.msg.bot  { background:var(--surface); color:var(--text-dark); border-radius:2px 10px 10px 10px; }
.msg.user { background:var(--navy); color:#fff; margin-left:auto; border-radius:10px 2px 10px 10px; }
.chat-input-row { display:flex; border-top:1px solid var(--border-lt); }
#chat-input { flex:1; padding:11px 14px; border:none; outline:none; font-family:'DM Sans',sans-serif; font-size:13px; }
#chat-send { background:var(--gold); border:none; padding:11px 14px; cursor:pointer; color:var(--navy-deep); font-size:15px; }

/* ── NEWSLETTER FORM (reusable) ── */
.nl-form { display:flex; flex-direction:column; gap:9px; }
.nl-input { background:rgba(255,255,255,.08); border:1px solid rgba(201,168,76,.22); border-radius:4px; padding:12px 15px; color:#fff; font-family:'DM Sans',sans-serif; font-size:14px; outline:none; transition:.2s; }
.nl-input:focus { border-color:var(--gold); }
.nl-input::placeholder { color:rgba(255,255,255,.28); }
.nl-btn { background:var(--gold); color:var(--navy-deep); border:none; padding:14px; border-radius:4px; font-family:'Syne',sans-serif; font-size:14px; font-weight:800; cursor:pointer; transition:.2s; }
.nl-btn:hover { background:var(--gold-light); }
.nl-note { font-size:11px; color:rgba(255,255,255,.28); text-align:center; font-family:'DM Mono',monospace; }

/* ── RESPONSIVE ── */
@media(max-width:1024px){
  .grid-4 { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
}
@media(max-width:768px){
  .nav-links,.nav-cta { display:none; }
  .hamburger { display:block; }
  .grid-2,.grid-3,.grid-4 { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; gap:28px; }
  .footer-bottom { flex-direction:column; text-align:center; }
  .section { padding:56px 0; }
}