/* Reset */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;border:0;font:inherit;vertical-align:baseline}
html{scroll-behavior:smooth;scroll-padding-top:4rem}
body{line-height:1.6;font-family:'Noto Sans SC','Noto Serif SC',system-ui,-apple-system,sans-serif;background:#F5F2ED;color:#1A1A1A}
img,picture,svg{display:block;max-width:100%}
ul{list-style:none}
a{text-decoration:none;color:inherit}
button{cursor:pointer;background:none;border:none}
:focus-visible{outline:2px solid #D32F2F;outline-offset:2px}

/* CSS Variables */
:root{
  --color-primary:#1A3B5C;
  --color-accent-red:#D32F2F;
  --color-accent-gold:#F5A623;
  --color-bg-light:#F5F2ED;
  --color-bg-dark:#0F1D2B;
  --color-text:#1A1A1A;
  --color-text-dark:#FFFFFF;
  --color-border-subtle:#D1CEC6;
  --color-glass:rgba(255,255,255,0.15);
  --font-heading:'Noto Sans SC',sans-serif;
  --font-body:'Noto Serif SC',serif;
  --font-accent:'Noto Sans SC',sans-serif;
  --size-title:2.5rem;
  --size-subtitle:1.5rem;
  --size-body:1rem;
  --size-small:0.75rem;
  --breakpoint-tablet:768px;
  --breakpoint-desktop:1024px;
  --max-width:1280px;
  --spacing-xs:0.5rem;
  --spacing-sm:1rem;
  --spacing-md:1.5rem;
  --spacing-lg:2rem;
  --spacing-xl:3rem;
}

/* Typography */
h1,h2,h3{font-family:var(--font-heading);font-weight:700;line-height:1.2}
h1{font-size:var(--size-title)}h2{font-size:var(--size-subtitle)}h3{font-size:1.25rem}
p{font-family:var(--font-body);font-size:var(--size-body)}
.small-annotation{font-family:var(--font-accent);font-size:var(--size-small);font-weight:300;writing-mode:vertical-rl;text-orientation:mixed;color:var(--color-primary)}

/* Skip Link */
.skip-link{position:absolute;top:-100%;left:1rem;z-index:1000;padding:0.5rem 1rem;background:var(--color-primary);color:var(--color-text-dark);border-radius:0 0 4px 4px;transition:top 0.2s}
.skip-link:focus{top:0}

/* Site Header */
.site-header{background:var(--color-primary);color:var(--color-text-dark);border-bottom:2px solid var(--color-accent-gold)}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:var(--max-width);margin:0 auto;padding:var(--spacing-sm) var(--spacing-md);position:relative}
.header-brand{display:flex;flex-direction:column;gap:0.25rem}
.brand-link{font-family:var(--font-heading);font-size:var(--size-subtitle);font-weight:700;color:var(--color-text-dark);letter-spacing:0.05em}
.brand-link:hover{color:var(--color-accent-gold)}
.brand-tagline{font-family:var(--font-accent);font-size:var(--size-small);color:rgba(255,255,255,0.7);letter-spacing:0.1em;font-weight:300}

/* Navigation */
.header-nav{flex:1;display:flex;justify-content:flex-end}
.nav-list{display:flex;gap:var(--spacing-sm)}
.nav-item{position:relative}
.nav-link{font-family:var(--font-heading);font-size:0.875rem;padding:0.25rem 0.5rem;color:var(--color-text-dark);border-bottom:2px solid transparent;transition:border-color 0.2s,color 0.2s}
.nav-link:hover,.nav-link[aria-current="page"]{border-bottom-color:var(--color-accent-gold);color:var(--color-accent-gold)}
.nav-toggle{display:none;flex-direction:column;gap:4px;padding:0.25rem;width:2rem;height:2rem;background:transparent;border-radius:4px;transition:background 0.2s}
.nav-toggle:hover{background:rgba(255,255,255,0.1)}
.nav-toggle-line{display:block;width:100%;height:2px;background:var(--color-text-dark);border-radius:2px;transition:transform 0.2s,opacity 0.2s}
.nav-toggle[data-open] .nav-toggle-line:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[data-open] .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle[data-open] .nav-toggle-line:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* Mobile */
@media(max-width:767px){
  .nav-toggle{display:flex}
  .header-nav{position:absolute;top:100%;left:0;right:0;background:var(--color-primary);z-index:100;max-height:0;overflow:hidden;transition:max-height 0.3s ease}
  .header-nav[data-open]{max-height:300px}
  .nav-list{flex-direction:column;gap:0;padding:var(--spacing-sm) 0}
  .nav-link{display:block;padding:var(--spacing-xs) var(--spacing-md);border-bottom:1px solid rgba(255,255,255,0.1)}
  .nav-link:hover,.nav-link[aria-current="page"]{background:rgba(255,255,255,0.05);border-bottom-color:var(--color-accent-gold)}
}

/* Tablet & Desktop */
@media(min-width:768px){
  .header-nav{position:relative;max-height:none;overflow:visible;background:transparent}
}

/* Site Footer */
.site-footer{background:var(--color-bg-dark);color:var(--color-text-dark);padding:var(--spacing-xl) var(--spacing-md)}
.footer-inner{max-width:var(--max-width);margin:0 auto;display:flex;flex-direction:column;gap:var(--spacing-lg)}
.footer-top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:var(--spacing-lg)}
.footer-brand{flex:1;min-width:200px}
.footer-brand-name{font-family:var(--font-heading);font-size:var(--size-subtitle);font-weight:700;color:var(--color-text-dark)}
.footer-tagline{font-family:var(--font-accent);font-size:var(--size-small);color:rgba(255,255,255,0.6);margin-top:0.25rem}
.tibetan-divider{display:flex;align-items:center}
.tibetan-divider svg{width:80px;height:auto}
.footer-links{display:flex;gap:var(--spacing-sm);flex-wrap:wrap}
.footer-link{font-size:0.875rem;color:var(--color-accent-gold);border-bottom:1px solid transparent;transition:border-color 0.2s}
.footer-link:hover{border-bottom-color:var(--color-accent-gold)}
.footer-bottom{text-align:center;padding-top:var(--spacing-md);border-top:1px solid rgba(255,255,255,0.1)}
.footer-info{font-size:0.8rem;color:rgba(255,255,255,0.6)}
.footer-info:first-child{color:var(--color-text-dark);font-weight:300}

/* Glass Card */
.glass-card{background:var(--color-glass);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,0.2);border-radius:8px;padding:var(--spacing-md);transition:transform 0.2s,box-shadow 0.2s}
.glass-card:hover{transform:scale(1.02);box-shadow:0 4px 20px rgba(0,0,0,0.1)}

/* Scroll Progress Indicator */
.scroll-progress{position:fixed;top:0;left:0;width:0%;height:3px;background:linear-gradient(90deg,var(--color-accent-red),var(--color-accent-gold));z-index:2000;transition:width 0.1s linear}

/* Reveal on Scroll */
.reveal-on-scroll{opacity:0;transform:translateY(20px);transition:opacity 0.6s ease,transform 0.6s ease}
.reveal-on-scroll[data-revealed]{opacity:1;transform:translateY(0)}

/* General Utility */
.main-content{min-height:80vh;padding:var(--spacing-lg) var(--spacing-md);max-width:var(--max-width);margin:0 auto}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 var(--spacing-md)}
.btn{display:inline-flex;align-items:center;gap:0.5rem;padding:0.5rem 1.25rem;font-family:var(--font-heading);font-size:0.875rem;font-weight:600;border-radius:4px;cursor:pointer;transition:background 0.2s,color 0.2s,transform 0.2s}
.btn-primary{background:var(--color-accent-red);color:var(--color-text-dark);border:1px solid var(--color-accent-red)}
.btn-primary:hover{background:var(--color-accent-gold);color:var(--color-primary);transform:scale(1.02)}
.btn-outline{background:transparent;color:var(--color-primary);border:1px solid var(--color-primary)}
.btn-outline:hover{background:var(--color-primary);color:var(--color-text-dark)}

/* Reduced motion */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0.01ms!important;animation-duration:0.01ms!important}
  html{scroll-behavior:auto}
  .reveal-on-scroll{opacity:1;transform:none}
  .scroll-progress{display:none}
}

/* Focus visible */
:focus-visible{outline:2px solid var(--color-accent-red);outline-offset:2px}