body {
    background-color: #f0f2f5;
    padding: 10px;
    display: flex;
    align-items: flex-start;
    padding: 20px 0;
    justify-content: center;
    min-height: 100vh;
    box-sizing: border-box;
    margin: 0;
    font-family: Arial, sans-serif;
    /*overflow: hidden;*/
    background-color: #f4f6f9;
}

.slider-container {
    position: relative;
    width: 100vw;
    height: calc(100vh - 100px);
    /*margin-top: 20px;*/
}
.page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}
.page.active {
    opacity: 1;
    pointer-events: auto;
}
/*iframe {
    width: 100%;
    height: 100%;
    border: none;
}*/
.progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background-color: #e0e0e0;
    z-index: 1000;
}
.progress-bar {
    height: 100%;
    width: 0%;
    background-color: #2196F3;
    transition: width 0.3s ease;
}
.controls-wrapper {
    position: fixed;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 18px;
    border-radius: 50px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    z-index: 1000;
    backdrop-filter: blur(5px);
}
.control-btn {
    border: none;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    width: 250px;
    border-radius: 22px; 
}
.arrow-btn { padding: 0 24px; background-color: #2196F3; color: white; font-size: 22px; }
.arrow-btn:hover { background-color: #0b7dda; transform: scale(1.03); }
.arrow-btn:disabled { background-color: #cccccc; cursor: not-allowed; transform: none; opacity: 0.6; }
.generate-btn { padding: 0 32px; background-color: #4CAF50; color: white; font-size: 14px; text-transform: uppercase; letter-spacing: 0.5px; box-shadow: 0 4px 10px rgba(76, 175, 80, 0.25); display: none; }
.generate-btn:hover { background-color: #43a047; transform: scale(1.02); }
title-page , intro-moment , init-data , literature-list , var-gen , floor-type , deck-roof , roof-beam , roof-epure , sec-beam , sec-epure {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    margin: 0;
    padding: 10px;
    display: flex;
    align-items: flex-start;
    padding: 0;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    height: 90%;
}