html, body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    height: 100%;
    width: 100%;
    font-size:16px; /* 1rem=16px */
}

/* Header */
.header {
    position: fixed;
    top: 0.3125rem;
    left: 0;
    width: 100%;
    background-color: transparent;
    color: crimson;
    text-align: right;
    table-layout: fixed;
    padding: 0.125rem 0;
    z-index: 3;
}

.header img {
    height: 100%;
    vertical-align: middle;
}

/* Images */
img {
    max-width: 75%;
    height: auto;
    border: 0.125rem solid white;
    padding: 0.1rem;
    border-top-right-radius: 0.9375rem;
    border-bottom-left-radius: 0.9375rem;
    z-index: 0;
}

/* Body */
body {
    background: #00008B;
    margin: 0;
    margin-top: 10em;
    padding: 1em;
    font-family: Arial, Helvetica, sans-serif;
    display: -webkit-flex;
    display: -moz-flex;
    display: flex;
    -webkit-align-items: top;
    -moz-align-items: top;
    align-items: top;
    justify-content: center;
}

/* Circle Backgrounds */
.circle {
    position: absolute;
    border-radius: 50%;
    background: white;
    -webkit-animation: ripple 15s infinite;
    -moz-animation: ripple 15s infinite;
    animation: ripple 15s infinite;
    box-shadow: 0 0 0.0625rem #508fb9;
    z-index: -1;
}

.small { width: 12.5rem; height: 12.5rem; left: -6.25rem; bottom: -6.25rem; }
.medium { width: 25rem; height: 25rem; left: -12.5rem; bottom: -12.5rem; }
.large { width: 37.5rem; height: 37.5rem; left: -18.75rem; bottom: -18.75rem; }
.xlarge { width: 50rem; height: 50rem; left: -25rem; bottom: -25rem; }
.xxlarge { width: 62.5rem; height: 62.5rem; left: -31.25rem; bottom: -31.25rem; }

/* Opacity Shades */
.shade1 { opacity: 0.1; }
.shade2 { opacity: 0.2; }
.shade3 { opacity: 0.3; }
.shade4 { opacity: 0.7; }
.shade5 { opacity: 0.9; }
.nav-btn {
      width:200px;
      height:45px;
      font-size:16px;
      background-color:yellow;
      font-weight:bold;
      cursor:pointer;
      }
/* Button */
.btn {
    cursor: pointer;
    position: relative;
    padding: 0.3125rem;
    background: "";
    font-size: 1rem;
    border-top-right-radius: 0.9375rem;
    border-bottom-left-radius: 0.9375rem;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
    transition: all 0.5s;
    z-index: 1;
}

.btn:after, .btn:before {
    content: "";
    width: 0.625rem;
    height: 0.625rem;
    position: absolute;
    border: 0.3125rem solid white;
    -webkit-transition: all 1s;
    -moz-transition: all 1s;
    transition: all 1s;
}

.btn:after {
    top: -0.0625rem;
    left: -0.0625rem;
    border-top: 0.3125rem solid white;
    border-left: 0.3125rem solid white;
}

.btn:before {
    bottom: -0.0625rem;
    right: -0.0625rem;
    border-bottom: 0.3125rem solid white;
    border-right: 0.3125rem solid white;
}

.btn:hover {
    border-top-right-radius: 0;
    border-bottom-left-radius: 0;
    background: white;
}

.btn:hover:before,
.btn:hover:after {
    width: 100%;
    height: 100%;
    border-color: white;
}

/* Ripple Animation */
@-webkit-keyframes ripple {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.2); }
    100% { transform: scale(0.8); }
}
@-moz-keyframes ripple {
	0% { transform: scale(0.8); }
    50% { transform: scale(1.2); }
    100% { transform: scale(0.8); }
}
@keyframes ripple{
	0% { transform: scale(0.8); }
    50% { transform: scale(1.2); }
    100% { transform: scale(0.8); }
}
/* Tooltip */
.tooltip { position: relative; display: inline-block; }
.tooltip .tooltiptext {
    visibility: hidden;
    width: 7.5rem;
    background-color: #000;
    color: #fff;
    text-align: center;
    border-radius: 0.375rem;
    padding: 0.3125rem 0;
    position: absolute;
    z-index: 5;
    bottom: 100%;
    left: 25%;
}
.tooltip-right .tooltiptext { position: absolute; z-index: 5; bottom: 100%; left: 25%; }
.tooltip:hover .tooltiptext { visibility: visible; }

/* Link hover animation */
 a :hover {
	 -webkit-animation: shake 0.5s;
    -moz-animation: shake 0.5s;
    animation: shake 0.5s;
    -webkit-animation-iteration-count: infinite;
    -moz-animation-iteration-count: infinite;
    animation-iteration-count: infinite;
}

@-webkit-keyframes shake {
    0% { transform: translate(0.0625rem, 0.0625rem) rotate(0deg); }
    10% { transform: translate(-0.0625rem, -0.125rem) rotate(-1deg); }
    20% { transform: translate(-0.1875rem, 0) rotate(1deg); }
    30% { transform: translate(0.1875rem, 0.125rem) rotate(0deg); }
    40% { transform: translate(0.0625rem, -0.0625rem) rotate(1deg); }
    50% { transform: translate(-0.0625rem, 0.125rem) rotate(-1deg); }
    60% { transform: translate(-0.1875rem, 0.0625rem) rotate(0deg); }
    70% { transform: translate(0.1875rem, 0.0625rem) rotate(-1deg); }
    80% { transform: translate(-0.0625rem, -0.0625rem) rotate(1deg); }
    90% { transform: translate(0.0625rem, 0.125rem) rotate(0deg); }
    100% { transform: translate(0.0625rem, -0.125rem) rotate(-1deg); }
}
@-moz-keyframes shake {
    0% { transform: translate(0.0625rem, 0.0625rem) rotate(0deg); }
    10% { transform: translate(-0.0625rem, -0.125rem) rotate(-1deg); }
    20% { transform: translate(-0.1875rem, 0) rotate(1deg); }
    30% { transform: translate(0.1875rem, 0.125rem) rotate(0deg); }
    40% { transform: translate(0.0625rem, -0.0625rem) rotate(1deg); }
    50% { transform: translate(-0.0625rem, 0.125rem) rotate(-1deg); }
    60% { transform: translate(-0.1875rem, 0.0625rem) rotate(0deg); }
    70% { transform: translate(0.1875rem, 0.0625rem) rotate(-1deg); }
    80% { transform: translate(-0.0625rem, -0.0625rem) rotate(1deg); }
    90% { transform: translate(0.0625rem, 0.125rem) rotate(0deg); }
    100% { transform: translate(0.0625rem, -0.125rem) rotate(-1deg); }
}
@keyframes shake {
    0% { transform: translate(0.0625rem, 0.0625rem) rotate(0deg); }
    10% { transform: translate(-0.0625rem, -0.125rem) rotate(-1deg); }
    20% { transform: translate(-0.1875rem, 0) rotate(1deg); }
    30% { transform: translate(0.1875rem, 0.125rem) rotate(0deg); }
    40% { transform: translate(0.0625rem, -0.0625rem) rotate(1deg); }
    50% { transform: translate(-0.0625rem, 0.125rem) rotate(-1deg); }
    60% { transform: translate(-0.1875rem, 0.0625rem) rotate(0deg); }
    70% { transform: translate(0.1875rem, 0.0625rem) rotate(-1deg); }
    80% { transform: translate(-0.0625rem, -0.0625rem) rotate(1deg); }
    90% { transform: translate(0.0625rem, 0.125rem) rotate(0deg); }
    100% { transform: translate(0.0625rem, -0.125rem) rotate(-1deg); }
}

/* List container */
.list-container { display: none; margin-top: 0.625rem; list-style-type: none; padding: 0; }
.list-container li { padding: 0.3125rem 0; }

/* Menu */
ul { position: relative; top: 50%; left: 50%; -webkit-transform: translate(-50%, -50%); -moz-transform: translate(-50%, -50%); transform: translate(-50%, -50%); display: -webkit-flex;  display: -moz-flex; display: flex; justify-content: center; }
ul li { list-style: none; }
ul li a {
    position: relative;
    display: block;
    text-transform: uppercase;
    margin: 1.25rem 0;
    padding: 0.625rem 1.25rem;
    text-decoration: none;
    color: #99FF33;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    -webkit-transition: 0.5s;
    -moz-transition: 0.5s;
    transition: 0.5s;
    z-index: 1;
}
ul li a:before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border-top: 0.125rem solid #99FF33;
    border-bottom: 0.125rem solid #99FF33;
    -webkit-transform: scaleY(2);
    -moz-transform: scaleY(2);
    transform: scaleY(2);
    opacity: 0;
    -webkit-transition: 0.3s;
    -moz-transition: 0.3s;
    transition: 0.3s;
}
ul li a:after {
    content: '';
    position: absolute;
    top: 0.125rem; left: 0;
    width: 100%; height: 100%;
    background-color: #99FF33;
    -webkit-transform: scale(0);
    -moz-transform: scale(0);
    transform: scale(0);
    opacity: 0;
    transition: 0.3s;
    z-index: -1;
}
ul li a:hover { color: #00008B; }
ul li a:hover:before { -webkit-transform: scaleY(1); -moz-transform: scaleY(1); transform: scaleY(1); opacity: 1; }
ul li a:hover:after { -webkit-transform: scaleY(1); -moz-transform: scaleY(1); transform: scaleY(1); opacity: 1; }

/* Fonts */
@font-face { font-family: 'Noto Sans Malayalam'; src: url('fonts/NotoSansMalayalam-Regular.ttf'); }
@font-face {
    font-family: 'Pacifico';
    src: url('fonts/Pacifico-Regular.woff2') format('woff2'),
         url('fonts/Pacifico-Regular.ttf') format('truetype');
}

/* Marquee */
.marquee-container {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
    padding: 0.03125rem;
    border-radius: 0.9375rem;
    border: 0.0625rem solid #fff;
    position: relative;
    box-sizing: border-box;
}
.marquee {
    font-family: 'Noto Sans Malayalam', cursive;
    display: inline-block;
    white-space: nowrap;
    animation: marquee 20s linear infinite;
}
@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-100%); }
}
.marquee-container:hover .marquee { animation-play-state: paused; }

/* Snowflake */
.snowflake {
    color: #fff;
    font-size: 0.125rem; /* very small, consider increasing for mobile */
    font-family: Arial;
    text-shadow: 0 0 0.0625rem #000;
}

/* Responsive: tablets */
@media (max-width: 48rem) {
    body { flex-direction: column; padding: 2%; }
    img { max-width: 90%; }
    ul { flex-direction: column; top: auto; left: auto; transform: none; }
    .header { text-align: center; padding: 0.5rem; }
}

/* Responsive: phones */
@media (max-width: 30rem) {
    body { padding: 5%; }
    img { max-width: 100%; }
    ul li a { font-size: 0.75rem; padding: 0.5rem 0.75rem; }
    .marquee { font-size: 0.85rem; }
    .snowflake { font-size: 0.5rem; } /* bump size for visibility */
}
    .slider-container {
        width: 350px;
        height: 450px;
        margin: auto;
        position: relative;
        overflow: hidden;
        border-radius: 10px;
        border: 2px solid #ccc;
    }

    .slides {
        display: flex;
        height: 100%;
        transition: transform 0.5s ease-in-out;
    }

    .slides img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        cursor: pointer;
        flex-shrink: 0;
    }

    /* Arrows */
    .arrow-btn {
        position: absolute;
        top: 80%;
        transform: translateY(-50%);
        background: rgba(0,0,0,0.1);
        color: white;
        border: none;
        padding: 5px 10px;
        cursor: pointer;
        font-size: 28px;
        border-radius: 50%;
        user-select: none;
        z-index: 999;
    }

    .arrow-left { left: 10px; }
    .arrow-right { right: 10px; }

    .arrow-btn:hover {
        background: rgba(0,0,0,0.9);
    }

    /* FULLSCREEN VIEWER */
    #fullscreenViewer {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.9);
        justify-content: center;
        align-items: center;
        z-index: 2000;
    }

    #fullscreenViewer img {
        max-width: 95%;
        max-height: 95%;
        border-radius: 10px;
        box-shadow: 0 0 20px black;
    }

    #closeBtn {
        position: absolute;
        top: 20px;
        right: 30px;
        font-size: 40px;
        color: white;
        cursor: pointer;
        z-index: 2100;
    }