a.button {
    display: inline-block;
    margin-top: 8px;
    padding: 8px 14px;
    font-size: 14px;
    color: white;
    background: linear-gradient(to right, #007bff, #00c6ff);
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s ease;
}
a.button:hover {
    background: linear-gradient(to right, #00c6ff, #007bff);
    transform: scale(1.05);
}
#loader {
    position: fixed;
    width: 100%;
    height: 100%;
    background: rgb(2, 78, 78);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

#loader::after {
    content: "";
    width: 50px;
    height: 50px;
    border: 5px solid white;
    border-top: 5px solid black;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
html {
    background: linear-gradient(to bottom right, #0d2b46, #102a13);
    color: #f5f5f5;
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
}
body {
    color: white;
    font-family: 'Poppins', sans-serif;
    text-align: left;
    
}
.left-menu {
    position: fixed;
    top: 60px;
    left: 20px;
    width: 220px;
    background: rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(12px);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.left-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.left-menu li {
    padding: 10px;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s ease-in-out, transform 0.2s;
    border-radius: 8px;
}
.left-menu li:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}
.main-tab {
    color: #ffe66d;
    font-weight: bold;
    font-size: 20px;
    margin-bottom: 12px;
    letter-spacing: 1px;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.4);
}
.left-menu a {
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1));
}
.left-menu a:hover {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05));
    transform: scale(1.03);
    color: #ffe66d;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}
.submenu {
    display: none;
    max-height: 500px;
    overflow-y: auto;
}
.sub-tab {
    color: #ddd;
    font-size: 15px;
    margin-left: 10px;
    padding-left: 5px;
    border-left: 2px solid rgba(255, 255, 255, 0.2);
}

.content {
    margin-left: 260px;
    padding: 30px;
    color: white;
    font-family: 'Poppins', sans-serif;
    line-height: 1.7;
    font-size: 18px;
}
h1 {
    font-size: 90px;
    text-align: center;
    font-family: 'Great Vibes', cursive;
    background: linear-gradient(90deg, #ff6b6b, #ffb6b9, #ffe66d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 3px;
    margin-bottom: 60px;
    padding-top: 80px;
    animation: fadeIn 2s ease-in-out;
    text-shadow: 4px 4px 12px rgba(255, 255, 255, 0.2);
}
@keyframes fadeIn {
    0% { opacity: 0; transform: translatey(-30px) scale(0.8);}
    100% { opacity: 1; transform: translateY(0) scale(1);}
}
.jedna {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
p:before {
    content: "📘";
    position: absolute;
    left: -40px;
    top: 15px;
    font-size: 28px;
}
p:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0, 255, 200, 0.4);
}
.dva {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 320px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
.tecky1 {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 430px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
h2 {
    font-size: 50px;
    text-align: left;
    font-family: 'Great Vibes', cursive;
    background: linear-gradient(90deg, #ff6b6b, #ffb6b9, #ffe66d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 3px;
    margin-bottom: 60px;
    padding-top: 80px;
    animation: fadeIn 2s ease-in-out;
    text-shadow: 4px 4px 12px rgba(255, 255, 255, 0.2);
}
.tri {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 400px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
.ctyri {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 940px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
.pet {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
table {
    width: 70%;
    margin: 40px auto;
    border-collapse: collapse;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.08);
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    font-family: 'Poppins', sans-serif;
    color: white;
    transition: all 0.3s ease-in-out;
}

th, td {
    padding: 14px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    text-align: center;
    font-size: 15px;
}

th {
    background: linear-gradient(45deg, rgba(255,107,107,0.3), rgba(255,182,185,0.2));
    color: #ffe66d;
    font-size: 17px;
    text-transform: uppercase;
    letter-spacing: 1px;
    backdrop-filter: blur(12px);
}

tr:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.01);
    transition: 0.2s ease-in-out;
}
.sest {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 450px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
.obrazek1 {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: right;
    margin-left: 100px;
    margin-top: 50px;
}
.obrazek1:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
}
.modal-content {
    display: block;
    border-radius: 5px;
    max-width: 80%;
    max-height: 80vh;
    margin: 5% auto;;
}
.modal-img {
    width: 80%;
    height: auto;
    border-radius: 5px;
    display: block;
    margin: 0 auto
}
.close {
    position: absolute;
    top: 10px;
    right: 25px;
    font-size: 40px;
    color: white;
    cursor: pointer;
}
.close:hover {
    color: red;
}
.popis {
    color: white;
    font-size: 18px;
    margin-top: 10px;
}
.zpet {
    background: white;
    color: black;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    margin-top: 10px;
}
.zpet:hover {
    background: #ddd;
}
.obrazek2 {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 600px;
    margin-top: -50px;
}
.obrazek2:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.sedm {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1020px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
}
.obrazek3 {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
    margin-top: -10px;
}
.obrazek3:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.osm {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 280px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;
    margin-top: 140px;
}
.tecky1 {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 470px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
}
.tecky1:before {
    content: "📘";
    position: absolute;
    left: -40px;
    top: 15px;
    font-size: 28px;
}
.tecky1:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0, 255, 200, 0.4);
}
.obrazek4 {
    width: 100%;
    max-width: 450px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
    margin-top: -10px;
}
.obrazek4:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.deset {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
    margin-top: 180px;
}
.obrazek5 {
    width: 100%;
    max-width: 450px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
    margin-top: -10px;
}
.obrazek5:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.jedenact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 270px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
}
.obrazek6 {
    width: 100%;
    max-width: 450px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
    margin-top: -10px;
}
.obrazek6:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.dvanact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
    margin-top: 400px
}
.trinact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
}
.ctrnact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 970px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
}
.obrazek7 {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 250px;
}
.obrazek7:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.obrazek8 {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 600px;
    margin-top: -140px;
}
.obrazek8:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.patnact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
    margin-top: 200px;
}
.sestnact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 680px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
}
.tecky2 {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 250px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;    
}
.tecky2:before {
    content: "📘";
    position: absolute;
    left: -40px;
    top: 15px;
    font-size: 28px;
}
.tecky2:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0, 255, 200, 0.4);
}
.obrazek9 {
    width: 100%;
    max-width: 450px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
}
.obrazek9:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.sedmnact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 760px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
}
.tecky3 {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 960px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;    
}
.tecky3:before {
    content: "📘";
    position: absolute;
    left: -40px;
    top: 15px;
    font-size: 28px;
}
.tecky3:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0, 255, 200, 0.4);
}
.obrazek10 {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
}
.obrazek10:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.osmnact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;  
    margin-top: 310px;
}
.devatenact {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 930px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;  
}
.tecky4 {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px;    
}
.tecky4:before {
    content: "📘";
    position: absolute;
    left: -40px;
    top: 15px;
    font-size: 28px;
}
.tecky4:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0, 255, 200, 0.4);
}
.obrazek11 {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
}
.obrazek11:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.obrazek12 {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
}
.obrazek12:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.dvacet {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
    margin-top: 375px;
}
.obrazek13 {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
}
.obrazek13:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.dvacetjedna {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
    margin-top: 400px;
}
.obrazek14 {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    margin: 40px auto;
    float: left;
    margin-left: 400px;
}
.obrazek14:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 230, 109, 0.5);
}
.dvacetdva {
    color: #fff;
    font-size: 20px;
    text-align: left;
    line-height: 1.8;
    margin: 30px auto;
    width: 1100px;
    font-family: 'Poppins', sans-serif;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border-left: 6px solid #00ffc3;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease-in-out;
    position: relative;
    margin-left: 20px; 
}
.obrazek15 {
    width: 500px;
    cursor: pointer;
    transition: transform 0.3s;
    float: left;
    margin-left: 400px;
    height: auto;
}
.obrazek15:hover {
    transform: scale(1.1);
}

@media (max-width: 1200px) {
  .content,
  .jedna,
  .dva,
  .tri,
  .ctyri,
  .pet,
  .sest,
  .sedm,
  .osm,
  .devet,
  .deset,
  .jedenact,
  .dvanact,
  .trinact,
  .ctrnact,
  .patnact,
  .sestnact,
  .sedmnact,
  .osmnact,
  .devatenact,
  .dvacet,
  .dvacetjedna,
  .dvacetdva,
  .tecky1,
  .tecky2,
  .tecky3,
  .tecky4 {
    width: 90% !important;
    margin-left: auto !important;
    margin-right: auto !important;
  }

  .left-menu {
    position: static;
    width: auto;
    margin: 0 auto;
    border-radius: 0;
    box-shadow: none;
  }

  .content {
    margin-left: 0;
    padding: 20px;
  }

  h1, h2, h3, h4 {
    font-size: 7vw;
    text-align: center !important;
  }

  table {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .left-menu {
    padding: 10px;
  }

  .left-menu a {
    font-size: 14px;
    padding: 6px 10px;
  }

  .main-tab {
    font-size: 18px;
  }

  .modal-content {
    max-width: 95%;
    max-height: 90vh;
  }

  .modal-img {
    width: 100%;
  }

  .obrazek1,
  .obrazek2,
  .obrazek3,
  .obrazek4,
  .obrazek5,
  .obrazek6,
  .obrazek7,
  .obrazek8,
  .obrazek9,
  .obrazek10,
  .obrazek11,
  .obrazek12,
  .obrazek13,
  .obrazek14,
  .obrazek15 {
    float: none;
    margin: 20px auto;
    display: block;
  }
}

@media (max-width: 480px) {
  .content {
    font-size: 16px;
  }

  th, td {
    padding: 10px;
    font-size: 13px;
  }

  .tucne1 {
    font-size: 18px;
  }

  .popis {
    font-size: 16px;
  }
}