/* Tower Bridge Visitor Guide — stylesheet */
:root{
  --navy:#0d3b66;
  --navy-dark:#082848;
  --red:#c1272d;
  --cream:#f4f1de;
  --sand:#faf7ee;
  --ink:#1c2330;
  --muted:#5a6b80;
  --line:#e3e7ee;
  --accent:#ffb703;
  --radius:10px;
  --shadow:0 8px 24px rgba(13,59,102,.08);
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-decoration:underline;text-underline-offset:2px}
a:hover{color:var(--red)}
h1,h2,h3,h4{font-family:Georgia,"Times New Roman",serif;color:var(--navy);line-height:1.25;margin:0 0 .6em}
h1{font-size:clamp(1.7rem,4.2vw,2.6rem)}
h2{font-size:clamp(1.4rem,3vw,1.9rem);margin-top:1.8em}
h3{font-size:1.2rem;margin-top:1.4em}
p{margin:0 0 1em}
ul,ol{padding-left:1.2em;margin:0 0 1em}
li{margin-bottom:.4em}
blockquote{border-left:4px solid var(--accent);background:var(--sand);padding:1em 1.2em;margin:1.5em 0;border-radius:6px;font-style:italic;color:#2b3a52}
table{border-collapse:collapse;width:100%;margin:1.2em 0;font-size:.95rem}
th,td{padding:.75em .9em;border:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--navy);color:#fff;font-weight:600}
tr:nth-child(even) td{background:var(--sand)}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.btn{display:inline-block;background:var(--red);color:#fff!important;padding:.85em 1.4em;border-radius:var(--radius);font-weight:700;text-decoration:none;border:none;cursor:pointer;transition:transform .15s,background .15s;font-size:1rem}
.btn:hover{background:#9d1f24;transform:translateY(-1px);color:#fff!important}
.btn-outline{background:transparent;color:var(--navy)!important;border:2px solid var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff!important}
.btn-sm{padding:.55em 1em;font-size:.9rem}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 8px rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1em;padding:.7em 20px;max-width:var(--max);margin:0 auto}
.logo{display:block;flex-shrink:0}
.logo svg,.logo img{height:42px;width:auto}
.nav-toggle{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--navy);padding:.2em .4em}
.main-nav{display:flex;align-items:center;gap:1.2em}
.main-nav ul{display:flex;list-style:none;gap:1.1em;margin:0;padding:0;flex-wrap:wrap}
.main-nav a{color:var(--ink);text-decoration:none;font-size:.93rem;font-weight:500}
.main-nav a:hover{color:var(--red)}
.lang-switch{position:relative}
.lang-toggle{background:var(--sand);border:1px solid var(--line);padding:.4em .8em;border-radius:6px;cursor:pointer;font-size:.9rem;color:var(--ink)}
.lang-menu{display:none;position:absolute;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);padding:.5em;min-width:200px;max-height:340px;overflow-y:auto;z-index:200}
.lang-menu.open{display:block}
.lang-menu a{display:block;padding:.45em .7em;color:var(--ink);text-decoration:none;border-radius:5px;font-size:.9rem}
.lang-menu a:hover{background:var(--sand);color:var(--red)}

/* Hero */
.hero{position:relative;background:linear-gradient(rgba(8,40,72,.55),rgba(8,40,72,.65)),url(../img/tower-bridge-dawn.jpg) center/cover no-repeat;color:#fff;padding:3em 0 2.5em}
.hero h1{color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.4);max-width:780px}
.hero p.lede{font-size:1.15rem;max-width:680px;margin-bottom:1.5em;text-shadow:0 1px 4px rgba(0,0,0,.4)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:2em;align-items:start}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8em;margin-bottom:1.2em}
.hero-disclaimer{font-size:.78rem;opacity:.85;border-left:2px solid var(--accent);padding-left:.7em;cursor:help;max-width:520px}
.hero-disclaimer:hover{opacity:1}
.widget-card{background:#fff;color:var(--ink);border-radius:var(--radius);padding:1.2em;box-shadow:var(--shadow)}
.widget-card h3{margin-top:0;color:var(--navy);font-size:1.1rem}

/* Sections */
.section{padding:2.5em 0}
.section.alt{background:var(--sand)}
.lead{font-size:1.12rem;color:#2b3a52}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4em}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.6em;align-items:start}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.3em;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card h3{margin-top:0;font-size:1.15rem}
.card a.more{font-weight:600;text-decoration:none}
.card a.more:after{content:" →"}
.quick-summary{background:linear-gradient(135deg,#fffaf0,#fff6e3);border:1px solid #f0d68a;border-radius:var(--radius);padding:1.2em 1.4em;margin:1.5em 0}
.quick-summary h3{margin-top:0}
.tip{background:#eaf6f6;border-left:4px solid #2a9d8f;padding:1em 1.2em;border-radius:6px;margin:1.4em 0}
.tip strong{color:#1f6f63}
.warn{background:#fdecec;border-left:4px solid var(--red);padding:1em 1.2em;border-radius:6px;margin:1.4em 0}
figure{margin:1.5em 0}
figure img{border-radius:var(--radius);box-shadow:var(--shadow)}
figcaption{font-size:.86rem;color:var(--muted);margin-top:.5em;text-align:center}

/* FAQ */
details.faq{background:#fff;border:1px solid var(--line);border-radius:8px;padding:.8em 1.1em;margin-bottom:.7em}
details.faq summary{cursor:pointer;font-weight:600;color:var(--navy);list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary:before{content:"+ ";color:var(--red);font-weight:700}
details.faq[open] summary:before{content:"– "}
details.faq p{margin-top:.7em}

/* Breadcrumbs */
.breadcrumbs{font-size:.85rem;color:var(--muted);padding:.8em 0}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs span{margin:0 .4em}

/* Footer */
.site-footer{background:var(--navy-dark);color:#cfd8e3;padding:2.5em 0 1em;margin-top:3em;font-size:.92rem}
.site-footer a{color:#cfd8e3}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2em;margin-bottom:1.8em}
.site-footer h4{color:#fff;font-family:inherit;font-size:.98rem;text-transform:uppercase;letter-spacing:1px;margin:0 0 .8em}
.site-footer ul{list-style:none;padding:0}
.site-footer li{margin-bottom:.4em}
.footer-disclaimer{border-top:1px solid #1b4978;padding-top:1.2em;font-size:.82rem;color:#9bb0c8;line-height:1.55}
.footer-bottom{margin-top:1em;display:flex;justify-content:space-between;flex-wrap:wrap;gap:1em;font-size:.82rem;color:#9bb0c8}

/* CTA Banner */
.cta-banner{background:linear-gradient(135deg,var(--navy),#16548a);color:#fff;padding:2em;border-radius:var(--radius);text-align:center;margin:2.5em 0}
.cta-banner h2{color:#fff;margin-top:0}
.cta-banner p{font-size:1.05rem;opacity:.95}

/* Article body */
.article p, .article li{font-size:1.02rem}

/* Responsive */
@media(max-width:880px){
  .hero-grid,.grid-3,.grid-2,.footer-grid{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:1em 20px;flex-direction:column;align-items:stretch;gap:0}
  .main-nav.open{display:flex}
  .main-nav ul{flex-direction:column;gap:0;width:100%}
  .main-nav ul li{border-bottom:1px solid var(--line)}
  .main-nav ul li:last-child{border-bottom:0}
  .main-nav a{display:block;padding:.7em 0}
  .header-inner{position:relative}
  .hero{padding:2em 0 1.8em}
  .section{padding:1.8em 0}
}
@media(max-width:520px){
  body{font-size:16px}
  .hero p.lede{font-size:1rem}
  th,td{padding:.55em .6em;font-size:.9rem}
}