:root {
    --primary: #2f82bd;
    --secondary: #4aa7d8;
    --accent: #21b4c8;
    --bg-dark: #d9f1fb;
    --card-bg: rgba(255, 255, 255, 0.78);
    --text-main: #0f2d44;
    --text-muted: #48708d;
    --glass-border: rgba(47, 130, 189, 0.22);
    --transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    /* logotype.svg fon — juda xira bo‘lmasin; kerak bo‘lsa kamaytiring */
    --logo-watermark-opacity: 0.2;
    /* Yuqori chap INTEGRUM logosi — barcha slaydlarda bir xil */
    --corner-logo-top: 22px;
    --corner-logo-left: 28px;
    --corner-logo-w: clamp(200px, 24vw, 320px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://grainy-gradients.vercel.app/noise.svg');
    opacity: 0.08;
    z-index: 10;
    pointer-events: none;
}

/* Background Decoration */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    filter: blur(100px);
    opacity: 0.4;
    border-radius: 50%;
    animation: move 20s infinite alternate;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -50px;
    right: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 40%;
    animation-delay: -10s;
}

@keyframes move {
    from { transform: translate(0, 0); }
    to { transform: translate(100px, 50px); }
}

/* Logotip watermark — logotype.svg, butun ekran (cover), eng bilan blob ustida */
.bg-logo-watermark {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background: url("../logotype.svg") center center / cover no-repeat;
    opacity: var(--logo-watermark-opacity);
    /* SVG oq bo‘lsa fon ustida ko‘rinishi uchun yumshoq qoramtir siluet */
    filter: brightness(0.42);
}

/* Shu logotype.svg — faqat 1-slayd (tashkiliy sxema) uchun yuqori chap */
.bg-logo-corner {
    position: fixed;
    top: var(--corner-logo-top);
    left: var(--corner-logo-left);
    z-index: 50;
    pointer-events: none;
    width: var(--corner-logo-w);
    max-width: calc(100vw - 48px);
    transform: translateZ(0);
    backface-visibility: hidden;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease;
}

body.corner-logo-on-slide1 .bg-logo-corner {
    opacity: 1;
    visibility: visible;
}
.bg-logo-corner img {
    display: block;
    width: 100%;
    height: auto;
    /* Fon watermark bilan vizual til bir xil, biroz aniqroq */
    filter: brightness(0.34);
    opacity: 0.92;
}

/* Presentation Logic */
.presentation-container {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 1;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.42s ease, visibility 0.42s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

/* Glass Card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    padding: 50px;
    width: 100%;
    max-width: 1350px;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}