/* ========== BASE ========== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
    --bg:#0a0e1a;
    --bg2:#111827;
    --bg3:#1e293b;
    --border:#2d3a4f;
    --text:#f1f5f9;
    --text2:#94a3b8;
    --text3:#64748b;
    --accent:#818cf8;
    --accent2:#6366f1;
    --accent-glow:rgba(99,102,241,.15);
    --green:#34d399;
    --green-bg:rgba(52,211,153,.1);
    --red:#f87171;
    --red-bg:rgba(248,113,113,.08);
}

html{font-size:16px;scroll-behavior:smooth}
body{
    font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Inter',Roboto,sans-serif;
    background:var(--bg);
    color:var(--text);
    overflow:hidden;
    height:100vh;
    width:100vw;
    -webkit-font-smoothing:antialiased;
}

/* ========== PROGRESS BAR ========== */
.progress-bar{
    position:fixed;top:0;left:0;right:0;height:3px;
    background:var(--bg3);z-index:100;
}
.progress-fill{
    height:100%;width:14.3%;
    background:linear-gradient(90deg,var(--accent2),var(--accent));
    transition:width .4s cubic-bezier(.4,0,.2,1);
    border-radius:0 2px 2px 0;
}

/* ========== SLIDE COUNTER ========== */
.slide-counter{
    position:fixed;bottom:1.75rem;right:2.5rem;
    z-index:90;font-variant-numeric:tabular-nums;
    font-size:1rem;
    font-weight:600;
    color:var(--text2);
    background:var(--bg2);
    border:1px solid var(--border);
    padding:.375rem 1rem;
    border-radius:8px;
    letter-spacing:.06em;
    box-shadow:0 2px 8px rgba(0,0,0,.3);
}

/* ========== NAV ARROWS ========== */
.nav-arrow{
    position:fixed;top:50%;transform:translateY(-50%);
    z-index:90;
    background:var(--bg3);border:1px solid var(--border);
    color:var(--text2);
    width:48px;height:48px;border-radius:12px;
    font-size:1.25rem;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:all .2s;
    opacity:.6;
}
.nav-arrow:hover{opacity:1;background:var(--accent2);color:#fff;border-color:var(--accent2)}
.nav-prev{left:1.5rem}
.nav-next{right:1.5rem}

/* ========== SLIDES ========== */
.slide{
    position:fixed;inset:0;
    display:flex;align-items:center;justify-content:center;
    opacity:0;
    pointer-events:none;
    transition:opacity .5s cubic-bezier(.4,0,.2,1),transform .5s cubic-bezier(.4,0,.2,1);
    transform:translateX(60px);
}
.slide.active{
    opacity:1;pointer-events:auto;
    transform:translateX(0);
}

.slide-content{
    width:min(1100px,90vw);
    max-height:90vh;
    padding:2rem;
    overflow-y:auto;
}
.slide-content::-webkit-scrollbar{width:4px}
.slide-content::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}

/* ========== ENTRANCE ANIMATIONS ========== */
.anim-up{
    opacity:0;
    transform:translateY(30px);
    transition:opacity .6s cubic-bezier(.4,0,.2,1),transform .6s cubic-bezier(.4,0,.2,1);
}
.anim-pop{
    opacity:0;
    transform:scale(.7);
    transition:opacity .5s cubic-bezier(.4,0,.2,1),transform .5s cubic-bezier(.34,1.56,.64,1);
}
.anim-fade{
    opacity:0;
    transition:opacity .8s ease;
}

.slide.active .anim-up,
.slide.active .anim-pop,
.slide.active .anim-fade{
    opacity:1;
    transform:none;
}

.anim-delay-1{transition-delay:.1s}
.anim-delay-2{transition-delay:.2s}
.anim-delay-3{transition-delay:.35s}
.anim-delay-4{transition-delay:.5s}
.anim-delay-5{transition-delay:.65s}

/* Reset animations when slide is not active */
.slide:not(.active) .anim-up{opacity:0;transform:translateY(30px)}
.slide:not(.active) .anim-pop{opacity:0;transform:scale(.7)}
.slide:not(.active) .anim-fade{opacity:0}

/* ========== SLIDE LABEL ========== */
.slide-label{
    display:inline-block;
    font-size:.6875rem;
    text-transform:uppercase;
    letter-spacing:.1em;
    color:var(--accent);
    font-weight:700;
    margin-bottom:.75rem;
    padding:.25rem .75rem;
    background:var(--accent-glow);
    border-radius:999px;
}

/* ========== TYPOGRAPHY ========== */
h1{font-size:clamp(2.5rem,5vw,4rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;margin-bottom:.75rem}
h2{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;letter-spacing:-.02em;line-height:1.2;margin-bottom:1.25rem}
h3{font-size:1.125rem;font-weight:600;margin-bottom:.5rem}
.subtitle{font-size:clamp(1rem,1.5vw,1.25rem);color:var(--text2);line-height:1.6;max-width:640px}
.slide-desc{font-size:1rem;color:var(--text2);line-height:1.7;max-width:700px;margin-bottom:2rem}
.tagline{
    margin-top:1.5rem;
    font-size:1.125rem;
    color:var(--accent);
    font-weight:600;
}

/* ========== TITLE SLIDE ========== */
.title-slide{text-align:center;display:flex;flex-direction:column;align-items:center}
.logo-mark{
    font-size:3rem;
    margin-bottom:1rem;
    width:80px;height:80px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,var(--accent2),var(--accent));
    border-radius:20px;
    color:#fff;
    box-shadow:0 0 40px rgba(99,102,241,.3);
}
.scroll-hint{
    margin-top:3rem;
    font-size:.8125rem;
    color:var(--text3);
}
kbd{
    display:inline-block;
    padding:.125rem .5rem;
    background:var(--bg3);
    border:1px solid var(--border);
    border-radius:5px;
    font-size:.75rem;
    font-family:inherit;
    color:var(--text2);
}

/* ========== PROBLEM CARDS ========== */
.problems-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:1rem;
    margin-top:1.5rem;
}
.problem-card{
    background:var(--bg2);
    border:1px solid var(--border);
    border-radius:12px;
    padding:1.5rem;
    transition:border-color .2s,box-shadow .2s;
}
.problem-card:hover{border-color:var(--accent);box-shadow:0 0 20px rgba(99,102,241,.1)}
.problem-icon{font-size:1.75rem;margin-bottom:.75rem}
.problem-title{font-weight:600;margin-bottom:.375rem;font-size:.9375rem}
.problem-text{font-size:.8125rem;color:var(--text2);line-height:1.6}

/* ========== SOLUTION STEPS ========== */
.solution-features{
    display:flex;flex-direction:column;gap:1.25rem;
    margin-top:1rem;
}
.solution-item{
    display:flex;align-items:flex-start;gap:1.25rem;
    padding:1.25rem 1.5rem;
    background:var(--bg2);
    border:1px solid var(--border);
    border-radius:12px;
    transition:border-color .2s,box-shadow .2s;
}
.solution-item:hover{border-color:var(--accent);box-shadow:0 0 20px rgba(99,102,241,.1)}
.solution-number{
    font-size:1.5rem;font-weight:800;color:var(--accent);
    min-width:40px;line-height:1;
}
.solution-item strong{display:block;font-size:1rem;margin-bottom:.25rem}
.solution-item span{font-size:.875rem;color:var(--text2)}

/* ========== DOC TYPES SHOWCASE (tags) ========== */
.doc-types-showcase{
    display:flex;
    flex-wrap:wrap;
    gap:.625rem;
    margin-bottom:2rem;
}
.doc-type-tag{
    padding:.5rem 1.25rem;
    background:var(--bg2);
    border:1px solid var(--border);
    border-radius:999px;
    font-size:.875rem;
    font-weight:500;
    color:var(--text);
    transition:all .25s;
}
.doc-type-tag:hover{
    border-color:var(--accent);
    background:var(--accent-glow);
    color:var(--accent);
    transform:translateY(-2px);
    box-shadow:0 4px 12px rgba(99,102,241,.15);
}
.doc-type-tag.tag-more{
    border-style:dashed;
    color:var(--text3);
}
.doc-type-tag.tag-more:hover{
    color:var(--accent);
}

/* ========== DOC HIGHLIGHTS ========== */
.doc-highlights{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:1rem;
}
.doc-highlight-item{
    background:var(--bg2);
    border:1px solid var(--border);
    border-radius:10px;
    padding:1.25rem;
    transition:border-color .2s,box-shadow .2s;
}
.doc-highlight-item:hover{border-color:var(--accent);box-shadow:0 0 20px rgba(99,102,241,.1)}
.doc-highlight-item strong{
    display:block;
    font-size:.9375rem;
    margin-bottom:.375rem;
    color:var(--accent);
}
.doc-highlight-item span{
    font-size:.8125rem;
    color:var(--text2);
    line-height:1.6;
}

/* ========== FEATURES LIST ========== */
.features-list{display:flex;flex-direction:column;gap:.75rem}
.feature-row{
    display:flex;align-items:flex-start;gap:1rem;
    padding:1rem 1.25rem;
    background:var(--bg2);
    border:1px solid var(--border);
    border-radius:10px;
    transition:border-color .2s,box-shadow .2s;
}
.feature-row:hover{border-color:var(--accent);box-shadow:0 0 20px rgba(99,102,241,.1)}
.feature-icon-box{
    font-size:1.5rem;min-width:44px;height:44px;
    display:flex;align-items:center;justify-content:center;
    background:var(--accent-glow);
    border-radius:10px;
}
.feature-name{font-weight:600;font-size:.9375rem;margin-bottom:.125rem}
.feature-detail{font-size:.8125rem;color:var(--text2);line-height:1.5}

/* ========== SECURITY GRID ========== */
.security-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:1rem;
    margin-top:.5rem;
}
.security-card{
    background:var(--bg2);
    border:1px solid var(--border);
    border-radius:12px;
    padding:1.5rem;
    transition:border-color .2s,box-shadow .2s;
}
.security-card:hover{border-color:var(--accent);box-shadow:0 0 20px rgba(99,102,241,.1)}
.security-icon{font-size:1.75rem;margin-bottom:.75rem}
.security-card p{font-size:.8125rem;color:var(--text2);line-height:1.6}

/* ========== PRICING ========== */
.pricing-section{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:2rem;
    margin-top:.5rem;
    align-items:start;
}
.pricing-card-main{
    background:linear-gradient(135deg,rgba(99,102,241,.08),rgba(129,140,248,.04));
    border:2px solid var(--accent2);
    border-radius:16px;
    padding:2rem;
    text-align:center;
    position:relative;
    overflow:hidden;
}
.pricing-card-main::before{
    content:'';
    position:absolute;top:-50%;left:-50%;width:200%;height:200%;
    background:radial-gradient(circle at 30% 30%,rgba(99,102,241,.06) 0%,transparent 60%);
    pointer-events:none;
}
.pricing-badge{
    display:inline-block;
    font-size:.6875rem;
    text-transform:uppercase;
    letter-spacing:.1em;
    color:var(--accent);
    font-weight:700;
    margin-bottom:1rem;
    padding:.25rem .75rem;
    background:var(--accent-glow);
    border-radius:999px;
    position:relative;
}
.pricing-amount{
    font-size:2.5rem;
    font-weight:800;
    letter-spacing:-.02em;
    color:var(--text);
    position:relative;
}
.pricing-period{
    font-size:.875rem;
    color:var(--text2);
    margin-bottom:1.5rem;
    position:relative;
}
.pricing-includes{
    text-align:left;
    display:flex;flex-direction:column;gap:.5rem;
    position:relative;
    margin-bottom:1.5rem;
}
.pricing-item{
    font-size:.875rem;color:var(--text2);
    padding:.25rem 0;
}
.pricing-item::first-letter{color:var(--green)}

/* ========== TELEGRAM BUTTON ========== */
.btn-telegram{
    display:inline-flex;
    align-items:center;
    gap:.5rem;
    padding:.75rem 2rem;
    background:#2AABEE;
    color:#fff;
    border:none;
    border-radius:10px;
    font-size:.9375rem;
    font-weight:600;
    text-decoration:none;
    transition:all .2s;
    position:relative;
    cursor:pointer;
    box-shadow:0 4px 16px rgba(42,171,238,.3);
}
.btn-telegram:hover{
    background:#229ED9;
    transform:translateY(-2px);
    box-shadow:0 6px 24px rgba(42,171,238,.4);
}
.tg-icon{
    width:20px;height:20px;
}

.pricing-savings{
    background:var(--bg2);
    border:1px solid var(--border);
    border-radius:14px;
    padding:1.75rem;
}
.pricing-savings h3{margin-bottom:1rem}
.savings-compare{display:flex;flex-direction:column;gap:.75rem}
.savings-item{
    display:flex;justify-content:space-between;align-items:center;
    padding:.75rem 1rem;
    border-radius:8px;
    font-size:.875rem;
}
.savings-item.bad{background:var(--red-bg);border:1px solid rgba(248,113,113,.15)}
.savings-item.bad .savings-value{color:var(--red);font-weight:700}
.savings-item.good{background:var(--green-bg);border:1px solid rgba(52,211,153,.2)}
.savings-item.good .savings-value{color:var(--green);font-weight:700;font-size:1rem}
.savings-sub{font-size:.6875rem;color:var(--text3);margin-top:.125rem}
.pricing-footnote{font-size:.6875rem;color:var(--text3);margin-top:1rem}

/* ========== ROI BLOCK ========== */
.roi-block{
    margin-top:1.25rem;
    padding:1rem 1.25rem;
    background:var(--accent-glow);
    border:1px solid rgba(99,102,241,.25);
    border-radius:10px;
}
.roi-title{
    font-size:.75rem;
    text-transform:uppercase;
    letter-spacing:.08em;
    color:var(--accent);
    font-weight:700;
    margin-bottom:.5rem;
}
.roi-text{
    font-size:.8125rem;
    color:var(--text2);
    line-height:1.6;
}
.roi-text strong{color:var(--text)}

/* ========== RESPONSIVE ========== */
@media(max-width:768px){
    .slide-content{padding:1.5rem 1rem}
    .problems-grid{grid-template-columns:1fr 1fr}
    .doc-highlights{grid-template-columns:1fr}
    .security-grid{grid-template-columns:1fr}
    .pricing-section{grid-template-columns:1fr}
    .nav-arrow{width:40px;height:40px;font-size:1rem}
    .nav-prev{left:.5rem}
    .nav-next{right:.5rem}
    .slide-counter{bottom:1rem;right:1rem;font-size:.875rem}
}
@media(max-width:480px){
    .problems-grid{grid-template-columns:1fr}
}