/* ── SHARED STYLES FOR ALL SUBPAGES ─── */
:root {
  --bg:#080a0f;--bg2:#0d1017;--bg3:#131720;--bg4:#1a2030;
  --border:rgba(255,255,255,0.06);--border2:rgba(255,255,255,0.12);--border3:rgba(255,255,255,0.18);
  --txt:#e2e8f5;--txt2:#7a8599;--txt3:#3d4a60;
  --accent:#4f8ef7;--accent2:#3b7de8;--accent-g:rgba(79,142,247,0.1);--accent-glow:rgba(79,142,247,0.25);
  --green:#34d399;--green-g:rgba(52,211,153,0.1);--red:#f87171;--amber:#fbbf24;--amber-g:rgba(251,191,36,0.08);
  --radius:12px;--r-sm:8px;--r-lg:20px;
  --font:'Space Grotesk',sans-serif;--mono:'JetBrains Mono',monospace;--body:'Inter',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--body);background:var(--bg);color:var(--txt);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button{font-family:var(--font);cursor:pointer;border:none;background:none}
strong{font-weight:600}
code{font-family:var(--mono)}

/* GRID BG */
.grid-bg{position:fixed;top:0;left:0;width:100%;height:100%;background-image:linear-gradient(rgba(79,142,247,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(79,142,247,0.03) 1px,transparent 1px);background-size:60px 60px;pointer-events:none;z-index:0}
.grid-bg::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 50% at 50% 0%,rgba(79,142,247,0.06) 0%,transparent 70%)}

/* NAV */
#nav{position:sticky;top:0;z-index:200;background:rgba(8,10,15,0.88);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1100px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.nav-logo{font-family:var(--font);font-weight:700;font-size:18px;letter-spacing:-.03em;color:var(--txt);display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#4f8ef7 0%,#7c3aed 100%);display:flex;align-items:center;justify-content:center;font-size:14px;box-shadow:0 0 16px rgba(79,142,247,0.25)}
.nav-links{display:flex;gap:2px;align-items:center}
.nav-links a{font-family:var(--font);font-size:13.5px;font-weight:500;color:var(--txt2);padding:6px 12px;border-radius:7px;transition:color .15s,background .15s;white-space:nowrap}
.nav-links a:hover{color:var(--txt);background:var(--bg4)}
.nav-links a.active{color:var(--accent)}
.nav-right{display:flex;gap:8px;align-items:center;flex-shrink:0}
.btn-nav-dl{background:var(--accent);color:#fff;border-radius:var(--r-sm);padding:8px 18px;font-family:var(--font);font-size:13.5px;font-weight:600;transition:background .15s,box-shadow .15s;box-shadow:0 0 0 0 rgba(79,142,247,0.25)}
.btn-nav-dl:hover{background:var(--accent2);box-shadow:0 0 18px rgba(79,142,247,0.25)}
.theme-toggle{color:var(--txt3);padding:6px 10px;border-radius:var(--r-sm);background:var(--bg3);border:1px solid var(--border);font-size:15px;transition:color .15s}
.theme-toggle:hover{color:var(--txt)}

/* WRAP */
.wrap{max-width:1100px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* PAGE HERO (subpages) */
.page-hero{padding:72px 0 56px}
.page-hero h1{font-family:var(--font);font-size:clamp(34px,5vw,56px);font-weight:700;letter-spacing:-.03em;line-height:1.05;margin-bottom:16px}
.hero-sub{font-size:17px;color:var(--txt2);max-width:560px;line-height:1.65}

/* LABELS / HEADINGS */
.sec-label{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
h2{font-family:var(--font);font-size:clamp(24px,3vw,36px);font-weight:700;letter-spacing:-.025em;margin-bottom:14px;line-height:1.1}
h3{font-family:var(--font);font-weight:600}
.sec-divider{border:none;border-top:1px solid var(--border);margin:0}
section{padding:72px 0}

/* NOTICE */
.notice{border-radius:var(--r-sm);padding:16px 20px;font-size:14px;line-height:1.7}
.notice.amber{background:rgba(251,191,36,0.08);border:1px solid rgba(251,191,36,0.18);color:#d97706}
.notice.red{background:rgba(248,113,113,0.06);border:1px solid rgba(248,113,113,0.18);color:#ef4444}

/* KBD */
kbd{font-family:var(--mono);font-size:12px;font-weight:600;background:var(--bg4);border:1px solid var(--border2);border-radius:6px;padding:3px 10px;color:var(--accent);white-space:nowrap;letter-spacing:.05em}

/* CHECK LISTS */
.check-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}
.check-list li{display:flex;align-items:flex-start;gap:8px;font-size:13.5px;color:var(--txt2)}
.ck{color:var(--green);flex-shrink:0;font-size:13px;margin-top:2px}
.cx{color:var(--red);flex-shrink:0;font-size:13px;margin-top:2px}

/* FAQ */
.faq-wrap{border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:last-child{border-bottom:none}
.faq-btn{width:100%;background:var(--bg2);text-align:left;padding:18px 24px;font-family:var(--font);font-size:14.5px;font-weight:500;color:var(--txt);display:flex;justify-content:space-between;align-items:center;gap:14px;transition:background .15s}
.faq-btn:hover{background:var(--bg3)}
.faq-btn.open{background:var(--bg3);color:var(--accent)}
.faq-chevron{width:22px;height:22px;border-radius:50%;background:var(--bg4);border:1px solid var(--border2);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--txt3);flex-shrink:0;transition:transform .22s,background .15s,color .15s}
.faq-btn.open .faq-chevron{transform:rotate(180deg);background:rgba(79,142,247,0.1);border-color:rgba(79,142,247,0.3);color:var(--accent)}
.faq-body{display:none;padding:6px 24px 20px;font-size:14px;color:var(--txt2);line-height:1.75;background:var(--bg3)}
.faq-body.show{display:block}

/* FOOTER */
footer{border-top:1px solid var(--border);padding:32px 24px;font-size:13px;color:var(--txt3);font-family:var(--body)}
footer a{color:var(--txt3);transition:color .15s}
footer a:hover{color:var(--txt2)}

/* TABLE */
.tbl-wrap{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);overflow:auto}
table{width:100%;border-collapse:collapse}
thead tr{border-bottom:1px solid var(--border2)}
th{text-align:left;padding:11px 18px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--txt3);white-space:nowrap;font-family:var(--mono)}
td{padding:12px 18px;font-size:14px;border-bottom:1px solid var(--border);vertical-align:top;color:var(--txt2)}
tr:last-child td{border-bottom:none}
td:first-child{font-family:var(--mono);font-size:12px;color:var(--accent);white-space:nowrap}

/* ── FEATURES PAGE ─── */
.feat-full-grid{display:flex;flex-direction:column;gap:0;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden}
.feat-full{display:flex;gap:24px;align-items:flex-start;padding:28px;border-bottom:1px solid var(--border);background:var(--bg2);transition:background .15s}
.feat-full:last-child{border-bottom:none}
.feat-full:hover{background:var(--bg3)}
.feat-full-icon{width:44px;height:44px;border-radius:10px;border:1px solid;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.feat-full h3{font-family:var(--font);font-size:16px;font-weight:600;margin-bottom:8px;color:var(--txt)}
.feat-full p{font-size:14px;color:var(--txt2);line-height:1.65}
.feat-full ul{padding-left:1.25rem;margin-top:8px;color:var(--txt2);font-size:13.5px;line-height:1.8}

/* ── GUIDE PAGE ─── */
.steps-wrap{display:flex;flex-direction:column}
.guide-step{display:flex;gap:24px;padding:28px 0;border-bottom:1px solid var(--border);align-items:flex-start}
.guide-step:last-of-type{border-bottom:none}
.step-num{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--accent);background:rgba(79,142,247,0.1);border:1px solid rgba(79,142,247,0.2);width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;letter-spacing:.05em}
.step-body h3{font-family:var(--font);font-size:17px;font-weight:700;margin-bottom:8px;color:var(--txt)}
.step-body p{font-size:14.5px;color:var(--txt2);line-height:1.7}
.btn-inline-dl{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;border-radius:var(--r-sm);padding:10px 20px;font-family:var(--font);font-size:14px;font-weight:600;margin-top:12px;transition:background .15s}
.btn-inline-dl:hover{background:var(--accent2)}
.mode-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.mode-tag{border-radius:6px;padding:4px 12px;font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.06em}
.mode-tag.g{background:var(--green-g);border:1px solid rgba(52,211,153,.2);color:var(--green)}
.mode-tag.r{background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.2);color:var(--red)}

/* ── SETTINGS PAGE ─── */
.checkbox-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:0}
.cb-item{display:flex;gap:14px;align-items:flex-start;background:var(--bg2);border:1px solid var(--border);border-radius:var(--r-sm);padding:16px 18px}
.cb-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);flex-shrink:0;margin-top:5px;box-shadow:0 0 6px rgba(79,142,247,0.4)}
.cb-item strong{font-family:var(--font);font-size:14px;font-weight:600;display:block;margin-bottom:3px}
.cb-item p{font-size:13px;color:var(--txt2)}
.tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.tip-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r-sm);padding:20px;display:flex;flex-direction:column;gap:10px}
.tip-icon{font-size:22px}
.tip-card p{font-size:13.5px;color:var(--txt2);line-height:1.65}

/* ── SECURITY PAGE ─── */
.sec-two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:0}
.card-plain{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;font-size:14px;color:var(--txt2);line-height:1.7}
.card-plain strong{color:var(--txt)}
.check-split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.check-col{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r-lg);padding:28px}
.check-col-head{font-family:var(--font);font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--border)}
.check-col-head.does{color:var(--green)}
.check-col-head.doesnt{color:var(--red)}
.check-list-lg{list-style:none;padding:0;display:flex;flex-direction:column;gap:12px}
.check-list-lg li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--txt2)}

/* ── LIGHT THEME ─── */
[data-theme="light"]{
  --bg:#f3f5fb;--bg2:#ffffff;--bg3:#eaecf4;--bg4:#e0e3ef;
  --border:rgba(0,0,0,0.07);--border2:rgba(0,0,0,0.12);--border3:rgba(0,0,0,0.2);
  --txt:#0b0f1a;--txt2:#4a5468;--txt3:#9aa3b5;
  --accent-g:rgba(37,99,235,0.07);--accent-glow:rgba(37,99,235,0.2);
  --green-g:rgba(16,185,129,0.08);--amber-g:rgba(245,158,11,0.08);
}
[data-theme="light"] .grid-bg{background-image:linear-gradient(rgba(79,142,247,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(79,142,247,0.04) 1px,transparent 1px)}
[data-theme="light"] #nav{background:rgba(243,245,251,0.9)}
[data-theme="light"] .notice.amber{color:#92400e}
[data-theme="light"] .notice.red{color:#991b1b}

/* ── MOBILE ─── */
@media(max-width:900px){
  .checkbox-grid,.tips-grid,.check-split,.sec-two-col{grid-template-columns:1fr}
  .feat-full{flex-direction:column}
}
@media(max-width:640px){
  .page-hero h1{font-size:32px}
  .guide-step{gap:16px}
}

/* ── MOBILE NAV ─── */
/* Hamburger — hidden on desktop, shown on mobile */
.hamburger{
  display:none;
  flex-direction:column;justify-content:center;align-items:center;
  gap:5px;width:36px;height:36px;
  border-radius:var(--r-sm);background:var(--bg3);border:1px solid var(--border);
  padding:0;flex-shrink:0;transition:background .15s;
}
.hamburger span{
  display:block;width:16px;height:1.5px;
  background:var(--txt2);border-radius:2px;
  transition:transform .25s ease,opacity .2s ease,background .15s;
}
.hamburger:hover{background:var(--bg4)}
.hamburger:hover span{background:var(--txt)}
.hamburger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0)}
.hamburger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* Mobile drawer — display:none keeps it fully out of layout on desktop */
.mobile-menu{
  display:none;
  position:fixed;
  top:60px;left:0;right:0;bottom:0;
  z-index:190;
  background:rgba(8,10,15,0.97);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  padding:20px 16px 32px;
  overflow-y:auto;
  flex-direction:column;gap:4px;
  border-top:1px solid var(--border);
}
.mobile-menu.open{display:flex}
.mobile-menu a{
  font-family:var(--font);font-size:15px;font-weight:500;
  color:var(--txt2);
  padding:13px 16px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  transition:color .15s,background .15s,border-color .15s;
}
.mobile-menu a:hover{color:var(--txt);background:var(--bg3);border-color:var(--border)}
.mobile-menu a.active{
  color:var(--accent);
  background:rgba(79,142,247,0.08);
  border-color:rgba(79,142,247,0.18);
}
.mobile-menu .mm-divider{height:1px;background:var(--border);margin:8px 0}
.mobile-menu .mm-dl{
  display:flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:#fff;
  border-radius:var(--r-sm);padding:13px 16px;
  font-family:var(--font);font-size:14px;font-weight:600;
  margin-top:4px;border:none;
  transition:background .15s,box-shadow .15s;
}
.mobile-menu .mm-dl:hover{background:var(--accent2);box-shadow:0 0 18px rgba(79,142,247,0.3)}

[data-theme="light"] .mobile-menu{background:rgba(243,245,251,0.97)}
[data-theme="light"] .mobile-menu a:hover{background:var(--bg3)}
[data-theme="light"] .mobile-menu a.active{background:rgba(37,99,235,0.07);border-color:rgba(37,99,235,0.18)}

/* On mobile: show hamburger, hide desktop nav + download btn in nav bar */
@media(max-width:640px){
  .hamburger{display:flex}
  .nav-links{display:none}
  .nav-right .btn-nav-dl{display:none}
}
@media (max-width: 768px) {
  .nav-right .theme-toggle {
    display: none;
  }

  .mobile-menu .theme-toggle {
    display: flex;
    width: 100%;
    margin-top: 10px;
  }
}