/* ===== 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:2rem}
body{min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
ul,ol{list-style:none}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button{cursor:pointer;background:none;border:none;font:inherit;color:inherit}
/* ===== VARIABLES ===== */
:root{
  --color-primary:#FF2A2A;
  --color-secondary:#00BFFF;
  --color-accent:#FFD700;
  --color-bg:#0A0A1A;
  --color-surface:#1A1A2E;
  --color-text:#FFFFFF;
  --color-text-secondary:#B0B0B0;
  --color-text-on-accent:#1A1A2E;
  --font-heading:'Orbitron','Segoe UI',sans-serif;
  --font-body:'Inter','Roboto','Noto Sans SC',sans-serif;
  --font-mono:'JetBrains Mono','Fira Code',monospace;
  --sidebar-width:280px;
  --border-thick:3px;
  --shadow-strong:0 8px 32px rgba(0,0,0,0.6),0 0 20px rgba(255,42,42,0.15);
  --shadow-glow:0 0 30px rgba(0,191,255,0.25),0 0 60px rgba(255,42,42,0.10);
  --radius-sm:4px;
  --radius-md:8px;
  --transition:0.25s cubic-bezier(0.22,1,0.36,1);
}
/* ===== BASE ===== */
body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:1rem;display:flex;flex-direction:column;min-height:100vh}
::selection{background:var(--color-primary);color:#fff}
:focus-visible{outline:2px dashed var(--color-secondary);outline-offset:4px}
.skip-link{position:absolute;top:-100%;left:1rem;padding:0.5rem 1.2rem;background:var(--color-accent);color:var(--color-text-on-accent);z-index:10000;font-weight:700;border-radius:var(--radius-sm);transition:top 0.2s}
.skip-link:focus{top:1rem}
/* ===== LAYOUT ===== */
.site-header{position:fixed;top:0;left:0;z-index:9000;height:100vh;width:var(--sidebar-width);background:var(--color-surface);border-right:var(--border-thick) solid var(--color-secondary);box-shadow:4px 0 30px rgba(0,191,255,0.10);display:flex;flex-direction:column}
.site-sidebar{display:flex;flex-direction:column;height:100%;padding:1.5rem 1.2rem;overflow-y:auto}
.brand-track{padding-bottom:1.5rem;border-bottom:2px solid rgba(255,215,0,0.3);margin-bottom:1.5rem}
.brand-logo{display:flex;align-items:center;gap:0.6rem;font-family:var(--font-heading);font-size:1.6rem;font-weight:700;color:var(--color-primary);text-shadow:0 0 20px rgba(255,42,42,0.4);transition:var(--transition)}
.brand-logo:hover{text-shadow:0 0 40px rgba(255,42,42,0.7);transform:scale(1.02)}
.brand-logo-icon{font-size:2rem;line-height:1;animation:pulse-glow 2.5s ease-in-out infinite}
@keyframes pulse-glow{0%,100%{opacity:1;filter:brightness(1)}50%{opacity:0.85;filter:brightness(1.3)}}
.brand-logo-text{letter-spacing:2px}
.brand-tagline{font-size:0.75rem;color:var(--color-text-secondary);margin-top:0.4rem;letter-spacing:1px;font-family:var(--font-body);border-left:2px solid var(--color-accent);padding-left:0.6rem}
.nav-track{flex:1}
.nav-list{display:flex;flex-direction:column;gap:0.4rem}
.nav-link{display:block;padding:0.7rem 1rem;border-radius:var(--radius-md);font-family:var(--font-heading);font-weight:400;font-size:0.9rem;letter-spacing:1px;color:var(--color-text-secondary);border-left:3px solid transparent;transition:var(--transition);position:relative}
.nav-link:hover,.nav-link:focus-visible{color:var(--color-text);background:rgba(255,42,42,0.08);border-left-color:var(--color-primary);padding-left:1.5rem}
.nav-link[aria-current="page"]{color:var(--color-primary);border-left-color:var(--color-primary);background:linear-gradient(90deg,rgba(255,42,42,0.12),transparent);font-weight:700;text-shadow:0 0 10px rgba(255,42,42,0.2)}
.sidebar-footer{padding-top:1.2rem;border-top:1px solid rgba(255,255,255,0.06);margin-top:auto}
.sidebar-status{font-size:0.7rem;color:var(--color-text-secondary);display:flex;align-items:center;gap:0.4rem;font-family:var(--font-mono)}
.sidebar-status::before{content:'';display:inline-block;width:8px;height:8px;border-radius:50%;background:#00ff88;box-shadow:0 0 10px #00ff88;animation:blink-dot 2s infinite}
@keyframes blink-dot{0%,100%{opacity:1}50%{opacity:0.3}}
/* ===== NAV TOGGLE (mobile) ===== */
.nav-toggle{display:none;position:fixed;top:1rem;right:1rem;z-index:9500;width:44px;height:44px;background:var(--color-surface);border:2px solid var(--color-secondary);border-radius:var(--radius-md);flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:8px;box-shadow:0 0 20px rgba(0,191,255,0.2)}
.nav-toggle-bar{display:block;width:24px;height:2px;background:var(--color-text);border-radius:2px;transition:var(--transition)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
/* ===== MAIN CONTENT ===== */
.main-content{margin-left:var(--sidebar-width);padding:2rem 3rem 4rem;flex:1;min-height:100vh}
@media(max-width:1024px){.main-content{padding:2rem 1.5rem 3rem}}
/* ===== FOOTER ===== */
.site-footer{background:var(--color-surface);border-top:var(--border-thick) solid var(--color-secondary);padding:2.5rem 2rem;margin-left:var(--sidebar-width)}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1.5fr;gap:2rem;align-items:start}
.footer-logo{font-family:var(--font-heading);font-size:1.4rem;font-weight:700;color:var(--color-primary);text-shadow:0 0 15px rgba(255,42,42,0.2);transition:var(--transition)}
.footer-logo:hover{text-shadow:0 0 30px rgba(255,42,42,0.4)}
.footer-desc{font-size:0.8rem;color:var(--color-text-secondary);margin-top:0.3rem;max-width:28rem}
.footer-links{display:flex;flex-direction:column;gap:0.5rem;padding-left:1rem;border-left:2px solid rgba(255,215,0,0.25)}
.footer-link{font-size:0.85rem;color:var(--color-text-secondary);transition:var(--transition);padding:0.2rem 0}
.footer-link:hover{color:var(--color-secondary);padding-left:0.3rem}
.footer-contact{display:flex;flex-direction:column;gap:0.4rem;font-size:0.8rem;color:var(--color-text-secondary)}
.footer-contact-item{display:flex;align-items:center;gap:0.3rem}
.footer-meta{grid-column:1/-1;margin-top:1.5rem;padding-top:1.2rem;border-top:1px solid rgba(255,255,255,0.06);display:flex;flex-wrap:wrap;gap:1rem 2rem;font-size:0.7rem;color:var(--color-text-secondary);font-family:var(--font-mono)}
.footer-icp{color:var(--color-accent);font-weight:600}
.footer-copy{color:var(--color-text-secondary)}
@media(max-width:768px){.footer-inner{grid-template-columns:1fr;gap:1.5rem}.footer-links{border-left:none;padding-left:0}.site-footer{margin-left:0;padding:1.5rem 1rem}}
/* ===== UTILITY ===== */
.container{max-width:1200px;margin:0 auto;width:100%}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.text-center{text-align:center}
/* ===== COMPONENTS ===== */
.float-card{background:var(--color-surface);border:var(--border-thick) solid rgba(0,191,255,0.2);border-radius:var(--radius-md);padding:1.5rem;box-shadow:var(--shadow-strong);transition:var(--transition);position:relative;overflow:hidden}
.float-card::after{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 40%,rgba(255,42,42,0.03),transparent 70%);pointer-events:none}
.float-card:hover{border-color:var(--color-secondary);transform:translateY(-4px) rotateX(1deg);box-shadow:var(--shadow-glow)}
.version-badge{display:inline-block;background:var(--color-accent);color:var(--color-text-on-accent);font-family:var(--font-mono);font-weight:700;font-size:0.75rem;padding:0.2rem 0.8rem;border-radius:var(--radius-sm);letter-spacing:0.5px;text-transform:uppercase}
.data-panel{background:rgba(26,26,46,0.85);border:1px solid var(--color-secondary);border-radius:var(--radius-md);padding:1.2rem;backdrop-filter:blur(8px);box-shadow:inset 0 0 30px rgba(0,191,255,0.05)}
.border-accent{border-color:var(--color-accent)}
.text-primary{color:var(--color-primary)}
.text-secondary{color:var(--color-secondary)}
.text-accent{color:var(--color-accent)}
/* ===== COVER STAGE ===== */
.cover-stage{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;padding:1rem 0 3rem;position:relative}
.cover-stage::before{content:'';position:absolute;top:0;right:0;width:45%;height:100%;background:linear-gradient(135deg,transparent 40%,rgba(255,42,42,0.04));pointer-events:none}
.cover-main{display:flex;flex-direction:column;gap:1.2rem;justify-content:center}
.cover-title{font-family:var(--font-heading);font-size:4rem;font-weight:700;line-height:1.1;text-transform:uppercase;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:none;letter-spacing:-1px}
.cover-lead{font-size:1.2rem;color:var(--color-text-secondary);max-width:32rem;line-height:1.7;border-left:3px solid var(--color-accent);padding-left:1.2rem;margin-top:0.5rem}
.cover-cta{display:flex;gap:1rem;margin-top:0.5rem}
.index-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;align-content:center}
@media(max-width:768px){.cover-stage{grid-template-columns:1fr;gap:1.5rem}.cover-title{font-size:2.2rem}.index-grid{grid-template-columns:1fr}}
/* ===== RESPONSIVE SIDEBAR ===== */
@media(max-width:768px){
  .site-header{width:100%;height:auto;position:relative;border-right:none;border-bottom:var(--border-thick) solid var(--color-secondary)}
  .site-sidebar{display:none;flex-direction:column;width:100%;padding:1rem;background:var(--color-surface);position:fixed;top:0;left:0;height:100vh;z-index:9000;overflow-y:auto;border-right:var(--border-thick) solid var(--color-secondary)}
  .site-sidebar[data-open]{display:flex}
  .nav-toggle{display:flex}
  .main-content,.site-footer{margin-left:0}
  .brand-track{padding-bottom:1rem;margin-bottom:1rem}
  .sidebar-footer{display:block}
}
@media(min-width:769px)and(max-width:1024px){
  :root{--sidebar-width:240px}
  .brand-logo{font-size:1.3rem}
  .nav-link{font-size:0.8rem;padding:0.5rem 0.8rem}
}
/* ===== REDUCED MOTION ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important}
  .brand-logo-icon{animation:none}
  .sidebar-status::before{animation:none}
  .float-card:hover{transform:none}
}
/* ===== IMAGE CONTAINER ===== */
.img-container{position:relative;overflow:hidden;border-radius:var(--radius-md);background:var(--color-surface);border:1px solid rgba(0,191,255,0.12)}
.img-container img{width:100%;height:100%;object-fit:cover}
.img-container::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,transparent 60%,rgba(255,42,42,0.05));pointer-events:none}
/* ===== SCROLL TOP ===== */
[data-scroll-top]{position:fixed;bottom:2rem;right:2rem;z-index:8000;width:48px;height:48px;border-radius:50%;background:var(--color-primary);color:#fff;font-size:1.4rem;display:flex;align-items:center;justify-content:center;box-shadow:0 0 30px rgba(255,42,42,0.3);border:2px solid rgba(255,255,255,0.15);transition:var(--transition);opacity:0;pointer-events:none;transform:translateY(20px)}
[data-scroll-top][data-visible]{opacity:1;pointer-events:auto;transform:translateY(0)}
[data-scroll-top]:hover{background:var(--color-secondary);box-shadow:0 0 40px rgba(0,191,255,0.4);transform:translateY(-2px)}
/* ===== SECTION NAV ===== */
[data-section-nav]{position:fixed;right:1.5rem;top:50%;transform:translateY(-50%);z-index:7000;display:flex;flex-direction:column;gap:0.6rem}
[data-section-nav] a{display:block;width:10px;height:10px;border-radius:50%;background:var(--color-text-secondary);border:2px solid transparent;transition:var(--transition);position:relative}
[data-section-nav] a[data-active]{background:var(--color-primary);border-color:var(--color-secondary);box-shadow:0 0 16px rgba(255,42,42,0.4)}
[data-section-nav] a:hover{background:var(--color-secondary);transform:scale(1.3)}
@media(max-width:768px){[data-section-nav]{display:none}}