style.css

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

/* general */
img {
    max-width: 100%;
}
li {
    list-style: none;
}
a {
    color: inherit;
    text-decoration: none;
    /* background: linear-gradient(to bottom,rgba(0,0,0,0) 90%,#71dbf374 90%); */
    /* border-radius: 3px; */
}
body {
    background-color: #f5f5f5;
    line-height: 50px;
}
body, input, textarea, button, select {
    font-size: 22px;
    font-family: 'Shabnam', 'Tahoma', 'Roboto', sans-serif;
}

/* common */
/* .container {
    max-width: 1200px;
    margin: auto;
    padding: 0 20px;
} */
footer, section.normal {
    padding: 100px;
}
section.normal-less {
    padding-top: 0px;
}
.note {
    color: #079dbe;
    /* font-weight: bold; */
}

/* slider */
section.slider {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5px;
    background-image: linear-gradient(to bottom, rgba(14, 165, 233, 0.40), rgba(0, 0, 0, 0.90)), url('bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    text-align: center;
    color: #fff;
    flex-direction: column;
}
section.slider.mini-slider {
    height: 300px !important;
}
section.slider.mini-slider h1 {
    font-size: 24px !important;
}
section.slider.mini-slider img {
    width: 20% !important;
    max-width: fit-content;
}
section.slider.mini-slider h2,
section.slider.mini-slider .arrow-icon {
    display: none !important;
}
section.slider h1 span {
    color: yellow;
}
section.slider h1 {
    font-size: 50px;
    font-weight: 700;
    margin-bottom: 20px;
    /* text shadow */
    text-shadow: 0 0 10px #000;
    font-family: 'Sahel';
}
section.slider .arrow-icon {
    bottom: 40px;
    position: absolute;
    animation: arrow 1s infinite;
    cursor: pointer;
}

/* nav */
nav {
    width: 100%;
    height: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}
nav li {
    padding: 0 10px;
    border-radius: 6px;
    background-color: #083d73;
    color: white;
}
nav li:hover,  li.active {
    background-color: #468cb5;
}

/* normal */
section.normal {
    width: 100%;
    display: flex;
    flex-direction: column;
    color: black;
    min-height: 300px;
    font-size: 23px;
}
section.normal h2 {
    width: fit-content;
    font-family: 'Sahel';
    font-size: 40px;
    margin-bottom: 30px;
    background: linear-gradient(to bottom,rgba(0,0,0,0) 80%,#0acbf8 80%);
}
section.normal ul {
    padding: 20px;
}

section.normal .cover {
    width: 440px;
    max-width: 40%;
    display: inline-block;
    border-radius: 7px;
    border: 2px solid #0acbf8;
}

/* hr */
hr {
    border: 1px solid gray;
    border-color: gray;
}

/* speakers */
ul.speakers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
ul.speakers li {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    justify-content: center;
    padding: 20px;
    background-color: #fff;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
ul.speakers li img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin-bottom: 20px;
    object-fit: cover;
}
ul.speakers li .speaker-name {
    font-weight: bold;
}
ul.speakers li .speaker-university {
    font-weight: normal;
}

/* topics */
ul.topics {}
ul.topics li {
    display: flex;
    flex-direction: row;
    align-items: center;
}
ul.topics li h3 {
    font-weight: normal;
}

/* dates */
ul.dates {}
ul.dates li {}
ul.dates li label {
    font-weight: bold;
}

/* submit */
form.submit {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
form.submit label {
    font-weight: bold;
}
form.submit input {
    width: 100%;
    padding: 10px;
    border: 1px solid #0acbf8;
    border-radius: 5px;
    margin-bottom: 10px;
}
form.submit select {
    width: 100%;
    padding: 10px;
    border: 1px solid #0acbf8;
    border-radius: 5px;
    margin-bottom: 10px;
}
form.submit button {
    width: 100%;
    padding: 10px;
    border: 1px solid #0acbf8;
    border-radius: 5px;
    background-color: #0acbf8;
    color: white;
    font-weight: bold;
    cursor: pointer;
    margin-top: 20px;
}

/* footer */
footer {
	padding-top: 25px;
	padding-bottom: 25px;
    border-top: 1px solid #eaeaea;
    background-color: white;
}
footer h6 {
	font-size: 25px;
	color: rgb(156, 163, 175);
	margin-bottom: 20px;
}
footer .row {
	width: 100%;
	display: flex;
	flex-direction: row;
	gap: 10px;
}
footer .row .col {
	width: 50%;
	display: flex;
	display: flex;
	flex-direction: column;
	padding: 10px;
}
footer ul li {
	display: flex;
	flex-direction: row;
	line-height: 55px;
	align-items: center;
	color: black;
}
footer ul li a {
	color: inherit;
}
footer ul li svg {
	width: 25px;
	height: 15px;
	color: rgb(156, 163, 175);
}
footer ul li span {}
footer hr {
	border: 0px;
	height: 1px;
    background-color: #b9b7b7;
	margin-top: 30px;
	margin-bottom: 30px;
}

/* animations */
@keyframes arrow {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(10px);
    }
    100% {
        transform: translateY(0);
    }
}

/* multi-languages */
html[dir=rtl] footer ul {
	margin-right: 15px;
}
html[dir=ltr] footer ul {
	margin-left: 15px;
}
html[dir=rtl] section.normal .cover {
    float: right;
    margin-left: 50px;
}
html[dir=ltr] section.normal .cover {
    float: left;
    margin-right: 50px;
}
html[dir=rtl] footer ul li svg {
	margin-left: 10px;
}
html[dir=ltr] footer ul li svg {
	margin-right: 10px;
}

/* media queries */
/* footer */
@media (max-width: 768px) {
    footer .row {
        flex-direction: column;
    }
    footer .row .col {
        width: 100%;
    }
}
/* cover */
@media (max-width: 800px) {
    section.normal .cover {
        width: 100%;
        max-width: 100%;
        float: none;
        display: block;
        margin-left: 0;
    }
}
/* slider */
@media (max-height: 700px) {
    section.slider h1 {
        font-size: 33px;
    }
    section.slider h2 {
        font-size: 23px;
    }
    section.slider .arrow-icon {
        bottom: 10px;
    }
}
@media (max-height: 500px) {
    section.slider .arrow-icon {
        display: none;
    }
    ul.speakers {
        grid-template-columns: repeat(200px);
    }
}

/* small font-size for `footer ul li` */
@media (max-width: 700px) {
    section.normal {
        padding: 30px;
    }
    footer {
        padding: 20px;
        font-size: 15px;
    }
    footer ul li svg {
        display: none;
    }
}