/* ============================================================
   MAINTAIN.OS — Marketing Deck
   ============================================================ */
:root{
  --midnight:#0A0F1E;--steel:#141C33;--panel:#111A2E;
  --teal:#0E9E86;--teal-dim:#0E7C6A;--amber:#F5A623;--red:#E5484D;
  --green:#3DD68C;--blue:#4C8DFF;--violet:#9E77ED;
  --ink:#E8EDF2;--ink-2:#AEBACC;--ink-3:#6C7C93;
  --line:rgba(140,160,190,.12);--line-2:rgba(140,160,190,.22);
  --mono:'IBM Plex Mono',monospace;--sans:'Inter',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--sans);background:var(--midnight);color:var(--ink);
  overflow:hidden;-webkit-font-smoothing:antialiased;
}
::selection{background:var(--teal);color:#fff}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:var(--steel);border-radius:20px}
::-webkit-scrollbar-thumb:hover{background:var(--line-2)}

/* ============ DECK ============ */
.deck{height:100vh;width:100vw;position:relative}
.slide{
  position:absolute;inset:0;
  display:flex;flex-direction:column;
  padding:46px 60px 92px;
  opacity:0;visibility:hidden;pointer-events:none;
  transform:translateY(20px);
  transition:opacity .5s ease,transform .5s ease,visibility .5s;
  overflow:hidden;
}
.slide.active{opacity:1;visibility:visible;pointer-events:auto;transform:none}
.slide.prev{transform:translateY(-20px)}

/* ambient bg glow */
.slide::before{
  content:'';position:absolute;top:-30%;right:-10%;
  width:60%;height:80%;border-radius:50%;
  background:radial-gradient(circle,rgba(14,158,134,.10),transparent 70%);
  pointer-events:none;z-index:0;
}

/* ============ COVER SLIDE ============ */
.cover{justify-content:center;align-items:flex-start;padding:60px 80px}
.cover-brand{display:flex;align-items:center;gap:16px;margin-bottom:40px}
.cover-mark{
  width:64px;height:64px;border-radius:16px;
  background:linear-gradient(135deg,var(--teal),var(--teal-dim));
  display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:34px;color:#fff;
  box-shadow:0 8px 30px rgba(14,158,134,.5);
}
.cover-name{font-size:24px;font-weight:800;letter-spacing:.5px}
.cover-name .dot{color:var(--teal)}
.cover-tag{font-family:var(--mono);font-size:11px;letter-spacing:3px;text-transform:uppercase;color:var(--ink-3);margin-top:3px}
.cover h1{font-size:64px;font-weight:900;line-height:1.05;letter-spacing:-1.5px;max-width:900px;margin-bottom:24px;position:relative;z-index:1}
.cover h1 em{font-style:normal;background:linear-gradient(120deg,var(--teal),var(--green));-webkit-background-clip:text;background-clip:text;color:transparent}
.cover-sub{font-size:19px;color:var(--ink-2);max-width:680px;line-height:1.6;margin-bottom:38px;position:relative;z-index:1}
.cover-stats{display:flex;gap:44px;position:relative;z-index:1}
.cstat b{font-family:var(--mono);font-size:34px;font-weight:700;color:var(--teal);display:block;line-height:1}
.cstat span{font-size:12.5px;color:var(--ink-3);margin-top:6px;display:block}
.cover-hint{position:absolute;bottom:40px;left:80px;font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:1px}
.cover-hint kbd{background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:5px;padding:2px 7px;margin:0 2px;font-family:var(--mono)}

/* ============ CONTENT SLIDE ============ */
.slide-head{position:relative;z-index:1;margin-bottom:22px;flex-shrink:0}
.slide-eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:var(--teal);margin-bottom:12px}
.slide-eyebrow::before{content:'';width:26px;height:2px;background:var(--teal)}
.slide-num-badge{font-family:var(--mono);color:var(--ink-3);margin-left:6px}
.slide-title{font-size:38px;font-weight:800;letter-spacing:-.8px;line-height:1.1}
.slide-desc{font-size:15px;color:var(--ink-2);margin-top:10px;max-width:760px;line-height:1.55}

.slide-body{flex:1;display:grid;grid-template-columns:340px 1fr;gap:36px;min-height:0;position:relative;z-index:1}

/* feature list */
.feat-list{display:flex;flex-direction:column;gap:14px;overflow-y:auto;padding-right:8px}
.feat{display:flex;gap:14px;align-items:flex-start}
.feat-ico{
  width:38px;height:38px;flex-shrink:0;border-radius:10px;
  display:grid;place-items:center;font-size:18px;
  background:rgba(14,158,134,.14);color:var(--teal);
}
.feat-ico.blue{background:rgba(76,141,255,.14);color:var(--blue)}
.feat-ico.amber{background:rgba(245,166,35,.14);color:var(--amber)}
.feat-ico.violet{background:rgba(158,119,237,.14);color:var(--violet)}
.feat-ico.red{background:rgba(229,72,77,.14);color:var(--red)}
.feat-ico.green{background:rgba(61,214,140,.14);color:var(--green)}
.feat-body{min-width:0}
.feat-title{font-size:14.5px;font-weight:700;line-height:1.3}
.feat-txt{font-size:12.5px;color:var(--ink-3);margin-top:3px;line-height:1.5}

/* screenshot frame — browser chrome */
.shot-frame{
  border-radius:14px;overflow:hidden;position:relative;
  border:1px solid var(--line-2);
  background:var(--panel);
  box-shadow:0 30px 80px rgba(0,0,0,.55);
  display:flex;flex-direction:column;min-height:0;
}
.shot-bar{
  height:38px;flex-shrink:0;display:flex;align-items:center;gap:8px;
  padding:0 16px;background:#0C1424;border-bottom:1px solid var(--line);
}
.shot-dots{display:flex;gap:7px}
.shot-dots i{width:11px;height:11px;border-radius:50%}
.shot-dots i:nth-child(1){background:#E5484D}
.shot-dots i:nth-child(2){background:#F5A623}
.shot-dots i:nth-child(3){background:#3DD68C}
.shot-url{
  flex:1;max-width:340px;margin:0 auto;height:24px;border-radius:7px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;gap:7px;
  font-family:var(--mono);font-size:10.5px;color:var(--ink-3);
}
.shot-url::before{content:'🔒';font-size:9px}
.shot-scroll{flex:1;overflow-y:auto;overflow-x:hidden;background:var(--midnight)}
.shot-scroll img{width:100%;display:block}
.shot-tag{
  position:absolute;top:48px;right:14px;z-index:5;
  font-family:var(--mono);font-size:9.5px;letter-spacing:1px;text-transform:uppercase;
  padding:4px 10px;border-radius:20px;font-weight:600;
  background:rgba(245,166,35,.16);color:var(--amber);border:1px solid rgba(245,166,35,.3);
  display:flex;align-items:center;gap:5px;
}
.shot-tag::before{content:'';width:6px;height:6px;border-radius:50%;background:currentColor}

/* clickable screenshot cue */
.shot-frame{cursor:zoom-in}
.shot-expand{
  position:absolute;bottom:14px;right:14px;z-index:6;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;border-radius:9px;font-size:11.5px;font-weight:600;
  background:rgba(10,15,30,.82);backdrop-filter:blur(6px);
  border:1px solid var(--line-2);color:var(--ink);
  opacity:0;transform:translateY(6px);transition:opacity .2s,transform .2s;pointer-events:none;
}
.shot-frame:hover .shot-expand{opacity:1;transform:none}
.shot-expand b{font-size:14px;line-height:1}

/* modal-type slide: single centered shot, wider */
.slide-body.solo{grid-template-columns:300px 1fr}

/* ============ LIGHTBOX ============ */
.lightbox{
  position:fixed;inset:0;z-index:200;
  background:rgba(4,7,14,.92);backdrop-filter:blur(8px);
  display:flex;flex-direction:column;
  opacity:0;pointer-events:none;transition:opacity .25s;
}
.lightbox.open{opacity:1;pointer-events:auto}
.lb-bar{
  height:54px;flex-shrink:0;display:flex;align-items:center;gap:16px;
  padding:0 22px;border-bottom:1px solid var(--line);
  background:rgba(10,15,30,.6);
}
.lb-title{font-weight:700;font-size:15px}
.lb-hint{font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:.5px}
.lb-close{
  margin-left:auto;width:38px;height:38px;border-radius:10px;font-size:22px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--ink-2);
  display:grid;place-items:center;transition:all .15s;
}
.lb-close:hover{background:rgba(229,72,77,.16);color:var(--red)}
.lb-scroll{flex:1;overflow:auto;padding:26px;display:flex;justify-content:center}
.lb-scroll img{
  width:100%;max-width:1400px;height:auto;align-self:flex-start;
  border-radius:12px;border:1px solid var(--line-2);
  box-shadow:0 30px 80px rgba(0,0,0,.6);
}

/* ============ SECTION DIVIDER SLIDE ============ */
.divider{justify-content:center;align-items:center;text-align:center}
.divider .slide-eyebrow{justify-content:center}
.divider .slide-eyebrow::before{display:none}
.divider-num{font-family:var(--mono);font-size:120px;font-weight:700;color:rgba(14,158,134,.14);line-height:1;margin-bottom:-20px}
.divider h2{font-size:52px;font-weight:900;letter-spacing:-1px;max-width:800px}
.divider p{font-size:17px;color:var(--ink-2);margin-top:18px;max-width:560px;line-height:1.6}

/* ============ CLOSING ============ */
.closing{justify-content:center;align-items:center;text-align:center}
.closing h2{font-size:56px;font-weight:900;letter-spacing:-1px;max-width:820px}
.closing h2 em{font-style:normal;color:var(--teal)}
.closing p{font-size:18px;color:var(--ink-2);margin-top:20px;max-width:620px;line-height:1.6}
.closing-cta{margin-top:38px;display:flex;gap:14px}
.cta-btn{display:inline-flex;align-items:center;padding:15px 30px;border-radius:11px;font-size:15px;font-weight:700;border:1px solid var(--line-2);color:var(--ink);text-decoration:none;transition:all .15s}
.cta-btn:hover{border-color:var(--teal);color:var(--teal)}
.cta-btn.primary{background:linear-gradient(135deg,var(--teal),var(--teal-dim));border-color:transparent;color:#fff;box-shadow:0 8px 24px rgba(14,158,134,.4)}
.cta-btn.primary:hover{filter:brightness(1.08);color:#fff}

/* ============ HUD ============ */
.hud{
  position:fixed;bottom:0;left:0;right:0;height:64px;z-index:100;
  display:flex;align-items:center;justify-content:center;gap:24px;
  background:linear-gradient(0deg,rgba(10,15,30,.95),transparent);
  padding:0 30px;
}
.nav-arrow{
  width:44px;height:44px;border-radius:11px;font-size:24px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--ink-2);
  display:grid;place-items:center;transition:all .15s;
}
.nav-arrow:hover{background:var(--teal);border-color:transparent;color:#fff}
.nav-arrow:disabled{opacity:.3;cursor:default}
.nav-arrow:disabled:hover{background:rgba(255,255,255,.04);color:var(--ink-2)}
.hud-center{display:flex;align-items:center;gap:14px}
.hud-count{font-family:var(--mono);font-size:12px;color:var(--ink-3)}
.hud-count b{color:var(--ink)}
.progress{width:200px;height:4px;border-radius:20px;background:rgba(255,255,255,.08);overflow:hidden}
.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--green));border-radius:20px;transition:width .5s ease}

/* ============ SLIDE MENU ============ */
.menu-toggle{
  position:fixed;top:22px;right:24px;z-index:120;
  width:44px;height:44px;border-radius:11px;font-size:18px;
  background:rgba(10,15,30,.8);backdrop-filter:blur(8px);
  border:1px solid var(--line);color:var(--ink-2);
  display:grid;place-items:center;transition:all .15s;
}
.menu-toggle:hover{color:var(--ink);border-color:var(--line-2)}
.menu-toggle.fs-on{background:rgba(14,158,134,.18);border-color:transparent;color:var(--teal)}
/* CSS pseudo-fullscreen fallback (when native FS blocked in embed) */
body.pseudo-fs{position:fixed;inset:0}
body.pseudo-fs .deck{height:100vh}
.slide-menu{
  position:fixed;top:0;right:0;bottom:0;width:300px;z-index:115;
  background:linear-gradient(180deg,#0C1424,#0A0F1E);
  border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .3s cubic-bezier(.2,.8,.2,1);
  overflow-y:auto;padding:70px 12px 20px;
}
.slide-menu.open{transform:none}
.menu-group{font-family:var(--mono);font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:var(--ink-3);padding:14px 14px 6px}
.menu-item{display:flex;align-items:center;gap:11px;padding:9px 14px;border-radius:8px;font-size:13px;color:var(--ink-2);cursor:pointer;transition:all .12s}
.menu-item:hover{background:rgba(255,255,255,.04);color:var(--ink)}
.menu-item.active{background:rgba(14,158,134,.14);color:var(--teal)}
.menu-item .mi-num{font-family:var(--mono);font-size:10px;color:var(--ink-3);width:20px}
.menu-item.active .mi-num{color:var(--teal)}

/* ============ RESPONSIVE ============ */
@media(max-width:1000px){
  .slide{padding:32px 30px 84px}
  .slide-body,.slide-body.solo{grid-template-columns:1fr;gap:18px}
  .feat-list{max-height:180px}
  .cover h1{font-size:44px}
  .slide-title{font-size:28px}
  .divider h2{font-size:36px}
  .closing h2{font-size:38px}
}