*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{font-family:Georgia,"Noto Serif SC","Source Han Serif SC",serif;background:#F5F0E1;color:#2B2B2B;line-height:1.6;min-height:100vh}
:focus-visible{outline:3px solid #D94F14;outline-offset:2px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto} *,*::before,*::after{animation-duration:0s!important;transition-duration:0s!important}}

/* CSS Variables */
:root{--bg-primary:#F5F0E1;--bg-secondary:#E8DCC8;--bg-content:#FDFBF5;--bg-white:#FFFFFF;--text-primary:#2B2B2B;--text-secondary:#8C7E6B;--accent:#D94F14;--accent-hover:#C4400F;--border:#8C7E6B;--font-heading:"Montserrat Bold","Segoe UI Bold",system-ui,sans-serif;--font-body:Georgia,"Noto Serif SC","Source Han Serif SC",serif;--nav-width:240px;--radius-large:24px;--radius-medium:16px;--radius-small:8px}

/* Skip Link */
.skip-link{position:absolute;top:-100%;left:0;z-index:1000;background:#D94F14;color:#fff;padding:8px 16px;text-decoration:none;font-family:var(--font-heading);font-weight:700;border-radius:0 0 var(--radius-small) 0}
.skip-link:focus{top:0}

/* Layout */
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.content{margin-left:var(--nav-width);padding:32px 40px;min-height:100vh}

/* Header (Left Sidebar) */
.site-header{position:fixed;top:0;left:0;width:var(--nav-width);height:100vh;background:#F5F0E1;border-right:1px solid #E8DCC8;display:flex;flex-direction:column;align-items:flex-start;padding:32px 24px;z-index:900}
.brand{font-family:var(--font-heading);font-size:22px;font-weight:700;color:#2B2B2B;text-transform:uppercase;letter-spacing:1px;margin-bottom:48px;white-space:nowrap}
.nav-toggle{display:none;position:absolute;top:20px;right:20px;background:none;border:none;cursor:pointer;padding:8px;z-index:10}
.nav-toggle-icon,.nav-toggle-icon::before,.nav-toggle-icon::after{display:block;width:24px;height:3px;background:#2B2B2B;border-radius:2px;transition:transform 0.2s,opacity 0.2s}
.nav-toggle-icon::before,.nav-toggle-icon::after{content:'';position:relative}
.nav-toggle-icon::before{top:-8px}
.nav-toggle-icon::after{top:5px}
[aria-expanded="true"] .nav-toggle-icon{background:transparent}
[aria-expanded="true"] .nav-toggle-icon::before{transform:translateY(8px) rotate(45deg)}
[aria-expanded="true"] .nav-toggle-icon::after{transform:translateY(-5px) rotate(-45deg)}
.site-nav{width:100%}
.nav-list{list-style:none;display:flex;flex-direction:column;gap:6px}
.nav-link{display:block;padding:10px 12px;font-family:var(--font-heading);font-weight:600;font-size:16px;color:#2B2B2B;text-decoration:none;border-radius:var(--radius-small);transition:background 0.2s,color 0.2s;position:relative}
.nav-link:hover,.nav-link:focus-visible{background:rgba(217,79,20,0.08);color:#D94F14}
.nav-link[aria-current="page"]{color:#D94F14;font-weight:700}
.nav-link[aria-current="page"]::after{content:'';position:absolute;left:12px;bottom:2px;width:calc(100% - 24px);height:2px;background:#D94F14;border-radius:1px}
.nav-link:hover::after{background:#D94F14}

/* Footer */
.site-footer{background:#2B2B2B;color:#F5F0E1;padding:32px 16px;text-align:center;margin-left:var(--nav-width)}
.footer-inner{max-width:800px;margin:0 auto}
.footer-copyright{margin-bottom:8px;font-size:14px;font-family:var(--font-heading);font-weight:400}
.footer-contact{margin-bottom:12px;font-size:14px;color:#E8DCC8;line-height:1.5}
.footer-nav{margin-top:8px;font-size:14px}
.footer-link{color:#F5F0E1;text-decoration:underline;text-underline-offset:3px;transition:color 0.2s}
.footer-link:hover,.footer-link:focus-visible{color:#D94F14}
.footer-sep{margin:0 12px;color:#8C7E6B}

/* Back to Top */
.back-to-top{position:fixed;bottom:32px;right:32px;z-index:800;width:44px;height:44px;border-radius:50%;background:#D94F14;color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:0 2px 8px rgba(0,0,0,0.15);opacity:0;visibility:hidden;transition:opacity 0.3s,visibility 0.3s;pointer-events:none}
.back-to-top.visible{opacity:1;visibility:visible;pointer-events:auto}
.back-to-top:hover,.back-to-top:focus-visible{background:#C4400F;transform:scale(1.05)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;font-family:var(--font-heading);font-size:16px;font-weight:600;border:none;border-radius:20px;background:#D94F14;color:#fff;cursor:pointer;text-decoration:none;transition:background 0.2s,transform 0.15s;border:1px solid transparent}
.btn:hover,.btn:focus-visible{background:#C4400F;transform:translateY(-1px)}
.btn-outline{background:transparent;color:#D94F14;border-color:#D94F14}
.btn-outline:hover{background:#D94F14;color:#fff}

/* Cards */
.card{background:var(--bg-content);border-radius:var(--radius-medium);padding:20px;box-shadow:0 1px 4px rgba(0,0,0,0.08);transition:box-shadow 0.2s,transform 0.2s}
.card:hover{box-shadow:0 4px 12px rgba(0,0,0,0.12);transform:translateY(-2px)}

/* Responsive */
@media(max-width:768px){
  .site-header{position:static;width:100%;height:auto;flex-direction:row;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid #E8DCC8}
  .brand{margin-bottom:0;font-size:18px}
  .nav-toggle{display:block}
  .site-nav{position:fixed;top:0;left:0;width:100%;height:100vh;background:rgba(245,240,225,0.98);padding:80px 24px 24px;z-index:-1;transform:translateY(-100%);transition:transform 0.3s ease;overflow-y:auto}
  .site-nav[data-open]{transform:translateY(0);z-index:5}
  .nav-list{flex-direction:column;gap:12px}
  .content{margin-left:0;padding:24px 16px}
  .site-footer{margin-left:0}
  .back-to-top{bottom:16px;right:16px}
}

@media(min-width:769px)and (max-width:1024px){
  :root{--nav-width:200px}
  .site-header{padding:24px 16px}
  .brand{font-size:18px;margin-bottom:32px}
  .content{padding:24px}
}

@media(min-width:1025px){
  .content{padding:40px 48px}
}