body {
    margin-bottom: 50px;
    margin-top: 50px;
    height: auto;
    display: flex;
    align-items: center;
    flex-direction: column;
    text-align: center;
    background: linear-gradient(135deg, #444 0%, #888 100%);
    font-family: 'Segoe UI', 'Arial', sans-serif;
}

.container {
    justify-content: center;
    align-items: center;
    width: 90%;
    padding: 30px;
    background: rgba(255,255,255,0.60);
    border: 2px solid #b0b0b0;
    border-radius: 50px;
    box-shadow:
        0 0 25px #e0e0e0,
        0 0 40px #f5f7fa,
        0 0 70px #ffffff inset;
}

.header {
    justify-content: center;
    align-items: center;
    display: flex;
    margin: 20px;
    padding: 20px;
    border-radius: 50px;
    box-shadow:
        0 4px 8px #b0b0b0,
        0 8px 16px #e0e0e099,
        inset 0 0 10px #fff;
    background: rgba(255,255,255,0.50);
}

.text-3d {
    position: relative;
    display: inline-block;
    color: #222;
    font-weight: bold;
    text-decoration: none;
    text-shadow: 2px 2px 8px #fff, 0 0 10px #b0b0b0;
}

.logo {
    height: 80px;
    filter: drop-shadow(0 0 10px #b0b0b0);
}

.logo1 {
    color: #6ca0f6;
    height: 100px;
    transition: transform 0.5s ease;
    filter: drop-shadow(0 0 10px #b0b0b0);
}

.logo1:hover {
    transform: scale(1.2);
    filter: drop-shadow(0 0 20px #6ca0f6);
}

.button3d {
    display: inline-block;
    background: linear-gradient(90deg, #2196f3 0%, #1565c0 100%);
    color: #fff;
    padding: 16px 36px;
    font-size: 20px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow:
        0 4px 16px #1565c099,
        0 8px 24px #2196f3,
        inset 0 0 10px #fff;
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.4s cubic-bezier(.25,.8,.25,1);
    
}

.button3d:hover {
    background: linear-gradient(90deg, #1565c0 0%, #42a5f5 100%);
    color: #fff;
    box-shadow:
        0 6px 24px #1565c0,
        0 12px 32px #2196f3,
        inset 0 0 16px #fff;
    transform: scale(1.09);
}

.button3d:active {
    transform: scale(0.97);
    box-shadow:
        0 2px 8px #1565c099,
        0 4px 12px #2196f3,
        inset 0 0 8px #fff;
}

.section {
    color: #222;
    font-weight: bold;
    text-align: center;
    margin: 40px;
    padding: 24px;
    border-radius: 100px;
    background: rgba(255,255,255,0.55);
    box-shadow:
        0 4px 16px #b0b0b0,
        0 8px 24px #e0e0e0,
        inset 0 0 10px #fff;
    text-shadow: 0 2px 8px #e0e0e0, 0 0 10px #f5f7fa;
    transition: transform 0.4s, box-shadow 0.4s;
}

.section:hover {
    transform: scale(1.03);
    box-shadow:
        0 8px 32px #b0b0b0,
        0 16px 48px #e0e0e0,
        inset 0 0 20px #fff;
}

.section:active {
    transform: scale(0.98);
    box-shadow:
        0 2px 8px #b0b0b099,
        0 4px 12px #e0e0e0,
        inset 0 0 8px #fff;
}

.tip-card {
    background: rgba(255,255,255,0.50);
    color: #222;
    border-radius: 60px;
    margin: 30px auto;
    padding: 20px 30px;
    font-weight: bold;
    box-shadow:
        0 4px 12px #b0b0b0,
        0 8px 24px #e0e0e0,
        inset 0 0 10px #fff;
    text-shadow: 0 1px 2px #fff, 0 0 2px #bdbdbd;
    transition: transform 0.3s, box-shadow 0.3s;
}

.tip-card:hover {
    transform: scale(1.02);
    box-shadow:
        0 8px 24px #b0b0b0,
        0 16px 32px #e0e0e0,
        inset 0 0 16px #fff;
}

.checklist {
    list-style: none;
    padding-left: 0;
    margin: 20px auto;
    max-width: 600px;
    text-align: left;
}

.checklist li {
    background: rgba(255,255,255,0.45);
    color: #222;
    margin: 10px 0;
    padding: 14px 20px 14px 48px;
    border-radius: 40px;
    font-size: 1.1em;
    position: relative;
    box-shadow: 0 2px 8px #b0b0b033, 0 1px 2px #e0e0e033;
    transition: background 0.2s;
}

.checklist li::before {
    content: "✔";
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: #2196f3;
    font-size: 1.3em;
    font-weight: bold;
    text-shadow: 0 0 6px #e0e0e0, 0 0 2px #bdbdbd;
}

.checklist li:hover {
    background: rgba(255,255,255,0.65);
    color: #1565c0;
}

.footer {
    margin-top: 40px;
    color: #b0b0b0;
    text-shadow: 0 0 8px #e0e0e0;
}

.footer a {
    color: #2196f3;
    text-decoration: underline;
    font-weight: bold;
}

/* Stilni tanlash tugmasi uchun chiroyli klass */
.style-switcher {
    display: inline-block;
    padding: 12px 32px;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(90deg, #42a5f5 0%, #1565c0 100%);
    border: none;
    border-radius: 40px;
    box-shadow:
        0 2px 8px #1565c066,
        0 4px 16px #2196f355;
    cursor: pointer;
    transition: 
        background 0.3s cubic-bezier(.25,.8,.25,1),
        box-shadow 0.3s,
        transform 0.2s;
    letter-spacing: 1px;
    outline: none;
    margin: 10px 0;
}

.style-switcher:hover, .style-switcher:focus {
    background: linear-gradient(90deg, #1565c0 0%, #42a5f5 100%);
    box-shadow:
        0 6px 24px #1565c0,
        0 12px 32px #2196f3;
    transform: scale(1.06);
    color: #fff;
}

.style-switcher:active {
    transform: scale(0.97);
    box-shadow:
        0 2px 8px #1565c099,
        0 4px 12px #2196f3;
}

@media (max-width: 768px) {
    .container,
    .header,
    .head,
    .section {
        width: 98%;
        margin: 8px;
        padding: 8px;
        border-radius: 30px;
    }

    .text-3d {
        font-size: 1.0em;
    }

    .logo1 {
        height: 70px;
    }

    .button3d {
        padding: 10px 20px;
        font-size: 16px;
    }

    .section {
        margin: 20px auto;
    }
}