:root {
  --bg:      oklch(99% 0 0);
  --surface: oklch(97% 0.003 250);
  --fg:      oklch(22% 0.008 260);
  --muted:   oklch(55% 0.01 250);
  --border:  oklch(90% 0.005 250);
  --accent:  oklch(54% 0.18 260);
  --accent-hover: oklch(50% 0.2 260);
  --positive: #16a34a;
  --negative: #dc2626;
  --font-inter:  'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
  --font-body:    -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
  --font-mono:    ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
  --radius: 8px;
  --max-w: 1280px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);font-size:15px;line-height:1.6;background:#fff;color:var(--fg);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}

/* HEADER */
.top-nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .3s}
.top-nav.scrolled{border-bottom-color:var(--border)}
.top-nav .inner{max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;height:60px;padding:0 24px}
.top-nav .logo{font-family:var(--font-display);font-size:20px;font-weight:600;letter-spacing:-.02em;color:var(--fg);margin-right:56px}
.top-nav .logo span{color:var(--accent)}
.top-nav nav{display:flex;align-items:center;height:60px}
.top-nav nav ul{display:flex;align-items:center;gap:0;height:100%;list-style:none}
.top-nav nav ul li{position:relative;height:100%;list-style:none}
.top-nav nav ul li>a{display:flex;align-items:center;height:100%;padding:0 16px;font-size:16px;font-weight:400;font-family:'Montserrat',sans-serif;color:#000;letter-spacing:-.01em;transition:color .15s;white-space:nowrap}
.top-nav nav ul li>a:hover{color:var(--accent);text-decoration:none}
.top-nav nav ul li>a.active{color:var(--accent)}
.top-nav .dropdown{position:absolute;top:100%;left:0;min-width:220px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,.06);opacity:0;visibility:hidden;transform:translateY(-4px);transition:all .2s;padding:6px 0;z-index:200}
.top-nav nav ul li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.top-nav .dropdown a{display:block;padding:8px 16px;font-size:14px;font-weight:400;font-family:'Montserrat',sans-serif;color:#1d1d1f;white-space:nowrap}
.top-nav .dropdown a:hover{background:var(--bg);color:var(--accent);text-decoration:none}
.top-nav .dropdown a.active{color:var(--accent);background:var(--bg)}

/* Mobile menu button */
.menu-toggle{display:none;width:44px;height:44px;border:none;background:transparent;cursor:pointer;position:relative;padding:0;margin-left:auto}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--fg);position:absolute;left:11px;transition:all .3s}
.menu-toggle span:nth-child(1){top:14px}
.menu-toggle span:nth-child(2){top:21px}
.menu-toggle span:nth-child(3){top:28px}
.menu-toggle.active span:nth-child(1){transform:rotate(45deg);top:21px}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:rotate(-45deg);top:21px}

/* Mobile menu overlay */
.mobile-menu-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);opacity:0;visibility:hidden;transition:all .3s;z-index:90}
.mobile-menu-overlay.active{opacity:1;visibility:visible}

/* Separate mobile nav */
.mobile-nav{display:none}
@media(max-width:768px){
  .mobile-nav{display:block;position:fixed;top:60px;left:0;right:0;height:calc(100vh - 60px);background:#fff;transform:translateX(-100%);transition:transform .3s,visibility .3s;z-index:96;overflow-y:auto;-webkit-overflow-scrolling:touch;visibility:hidden;pointer-events:none}
  .mobile-nav.open{transform:translateX(0);visibility:visible;pointer-events:auto}
  .mobile-nav ul{list-style:none;padding:12px 0;margin:0}
  .mobile-nav ul li a .arrow{width:28px;height:28px}
  .mobile-nav ul li a .arrow::after{content:'\25B8';font-size:18px;width:auto;height:auto;border:none;transform:rotate(0deg);margin-top:0;display:inline-block}
  .mobile-nav .dropdown-open > a .arrow::after{transform:rotate(90deg)}
  .mobile-nav ul li>a{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;font-size:16px;font-weight:400;font-family:'Montserrat',sans-serif;color:#000;text-decoration:none}
  .mobile-nav ul li>a:hover{color:var(--accent)}
  .mobile-nav ul li>a.active{color:var(--accent)}
  .mobile-nav .dropdown{padding:0 0 0 24px;display:none;background:var(--bg)}
  .mobile-nav ul li.dropdown-open .dropdown{display:block}
  .mobile-nav .dropdown a{display:block;padding:10px 24px;font-size:14px;color:#1d1d1f;text-decoration:none}
  .mobile-nav .dropdown a:hover{color:var(--accent)}
  .mobile-nav .dropdown a.active{color:var(--accent)}
}

/* FOOTER */
.footer{background:var(--fg);color:rgba(255,255,255,.8);position:relative;z-index:1}
.footer .inner{max-width:var(--max-w);margin:0 auto;padding:56px 24px 0}
.footer-top{display:grid;grid-template-columns:1fr 1fr 1fr;gap:48px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer h4{font-family:var(--font-display);font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:#fff;margin-bottom:14px}
.footer-col{display:flex;flex-direction:column;align-items:flex-start;gap:8px}
.footer-col a{color:rgba(255,255,255,.7);font-size:13px;transition:color .15s}
.footer-col a:hover{color:#fff;text-decoration:none}
.footer-icons{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.footer-icons a{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius);color:rgba(255,255,255,.7);transition:all .15s}
.footer-icons a:hover{border-color:rgba(255,255,255,.4);color:#fff;text-decoration:none;background:rgba(255,255,255,.05)}
.footer-icons svg{width:22px;height:22px;fill:currentColor}
.footer-friends{padding:24px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-friends h4{font-family:var(--font-display);font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:#fff;margin-bottom:12px}
.friend-links{display:flex;gap:24px;flex-wrap:wrap}
.friend-links a{color:rgba(255,255,255,.7);font-size:13px;transition:color .15s}
.friend-links a:hover{color:#fff;text-decoration:none}
.footer-disclaimer{padding:24px 0 40px;font-size:12px;color:rgba(255,255,255,.35);line-height:1.7}
.footer-disclaimer a{color:rgba(255,255,255,.5)}
.footer-disclaimer a:hover{color:#fff;text-decoration:none}

.app-dialog-overlay{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:200;opacity:0;visibility:hidden;transition:all .25s;display:flex;align-items:center;justify-content:center}
.app-dialog-overlay.active{opacity:1;visibility:visible}
.app-dialog{background:#fff;border-radius:12px;box-shadow:0 16px 48px rgba(0,0,0,.15);max-width:min(90vw,400px);width:90%;padding:28px 24px;position:relative;transform:scale(.95);transition:transform .25s;margin:auto;box-sizing:border-box}
.app-dialog-overlay.active .app-dialog{transform:scale(1)}
.app-dialog-close{position:absolute;top:12px;right:16px;border:none;background:transparent;font-size:22px;color:var(--muted);cursor:pointer;line-height:1;padding:4px}
.app-dialog-close:hover{color:var(--fg)}
.app-dialog-body{font-size:15px;color:var(--fg);line-height:1.6;text-align:center;padding-top:8px}

/* NOT FOUND */
.not-found{min-height:calc(100vh - 60px);display:flex;align-items:center;justify-content:center;padding:80px 24px}
.not-found .inner{max-width:var(--max-w);margin:0 auto}
.nf-content{text-align:center}
.nf-icon{width:120px;height:auto;margin-bottom:24px}
.nf-title{font-family:var(--font-display);font-size:32px;font-weight:600;color:var(--fg);margin-bottom:16px}
.nf-message{font-size:16px;color:var(--muted);margin-bottom:32px}
.nf-home-btn{display:inline-block;padding:12px 32px;background:var(--accent);color:#fff;border-radius:var(--radius);font-size:15px;font-weight:500;transition:background .2s}
.nf-home-btn:hover{background:var(--accent-hover);color:#fff;text-decoration:none}

/* Common responsive */
@media(max-width:900px){
  .footer-top{grid-template-columns:1fr 1fr}
}

@media(max-width:768px){
  .menu-toggle{display:block}
  .top-nav nav{display:none;height:auto}
  .top-nav .logo{margin-right:0}
  body.scroll-lock{overflow:hidden}
  .footer .inner{padding-bottom:96px}
}

@media(max-width:600px){
  .footer-top{grid-template-columns:1fr}
}

@media(max-width:400px){
  .footer .inner{padding-bottom:140px}
}