@charset "UTF-8";

/*
COLORS
================================================ */
:root {
    --light-blue: #4db1ec;
    --blue: #1665cc;
    --purple: #b473bf;
    --pink: #ffb2c1;
    --orange: #ff9f67;
    --yellow: #ffd673;
    --light-green: #a2e29b;
    --green: #00a2af;
    --grey: #333;
    --white: #fff;
}

/*
GENERAL STYLING
================================================ */
html {
    font-size: 100%;
}
body {
	color: var(--grey);
	font-family: sans-serif;
    text-align: center;
}

/*
COMMON
================================================ */
p {
    line-height: 1.7;
}
img {
    max-width: 100%;
}
h1 {
    font-size: 2rem;
    margin-top: 6rem;
    margin-bottom: 1rem;
}
h2 {
    font-size: 2rem;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
}

/* Layout */
.wrapper {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 0 1rem;
}

/*
HEADER
================================================ */
header {
    background: var(--grey);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    z-index: 1;
    top: 0;
}
header .wrapper {
    display: flex;
    justify-content: space-between;
}
header a {
    color: var(--white);
    font-size: 1.25rem;
}
.btn-menu {
    position: absolute;
    top: 12px;
    right: 12px;
    border: 1px solid rgba(255,255,255,.5);
    color: var(--white);
    padding: .5rem 1rem;
}
.main-nav {
    background: var(--grey);
    width: 0;
    position: absolute;
    z-index: 2;
    top: 50px;
    right: 0;
    overflow: hidden;
    transition: .5s;
}
.main-nav li {
    text-align: center;
    margin: 2rem 0;
}
.main-nav a {
    display: block;
}
.main-nav.open-menu {
    width: 100%;
}

/*
HOME
================================================ */
#home {
    /* ↓ 省略形だとブラウザーによってうまく表示されない
    background: var(--light-blue) url('../images/hero.jpg') no-repeat center / cover; */
    background-color: var(--light-blue);
    background-image: url('bg.jpg');
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    background-blend-mode: screen;
    animation: bg-color 24s infinite;
    height: 65vh;
    display: flex;
    align-items: center;
    -webkit-clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
    clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
    
}
@keyframes bg-color {
    0% { background-color: var(--light-blue); }
    12.5% { background-color: var(--blue); }
    25% { background-color: var(--purple); }
    37.5% { background-color: var(--pink); }
    50% { background-color: var(--orange); }
    62.5% { background-color: var(--yellow); }
    75% { background-color: var(--light-green); }
    87.5% { background-color: var(--green); }
    100% { background-color: var(--light-blue); }
}

.hero-date {
    text-align: center;
    border-top: 3px solid var(--grey);
    border-bottom: 3px solid var(--grey);
    padding: .5rem 0;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.title {
    font-family: 'Philosopher', serif;
    text-align: center;
    margin-top: 40%;
    font-size: 4rem;
    font-weight: normal;
}

.gmail{
    font-family: 'Philosopher', serif;
    text-align: center;
    font-size: 2rem;
}


/*
ABOUT
================================================ */

.mail {
  background: linear-gradient(var(--yellow), var(--orange));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-fill-color: transparent;
}

/*
SPEAKERS
================================================ */
h2 {
  background: linear-gradient(var(--light-blue), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-fill-color: transparent;
}

/*
TICKET
================================================ */
.ticket-btn {
    background: var(--grey);
    color: var(--white);
    display: block;
    width: 100%;
    padding: 1rem;
    margin-top: 1rem;
}

/*
FOOTER
================================================ */
.footer {
    border-top: 1px solid rgba(255,255,255,0.5);
    padding-top: 2rem;
    text-align: center;
    font-size: .875rem;
    color: var(--white);
}
.footer a {
    text-decoration: underline;
}


/*
DESKTOP SIZE
================================================ */
@media (min-width: 600px) {
/* Common */
    h2 {
        font-size: 3em;
    }
    a:hover,
    .ticket-btn:hover {
        transition: .3s;
    }
    a:hover {
        color: var(--blue);
    }
    .ticket-btn:hover {
        background: var(--blue);
    }

/* Header */
    .btn-menu {
        display: none;
    }
    .main-nav {
        width: 100%;
        position: static;
        display: flex;
    }
    .main-nav li {
        margin: 0 0 0 1.5rem;
    }
/* Hero */
    #hero h1 {
        font-size: 6.875rem;
    }
    .hero-date {
        font-size: 3rem;
    }
/* News */
    .news-table td {
        display: table-cell;
    }
    .news-date {
        padding: 1.125rem 0 1rem 1rem;
    }
    .news-content {
        padding: 1rem 1rem 1rem 0;
    }
/* Speakers */
    #speakers h2 {
        margin-bottom: 4rem;
    }
    .speakers-list {
        margin-bottom: 3rem;
    }
    .speakers-text {
        margin-left: 2rem;
    }
}

/*
DESKTOP SIZE
================================================ */
@media (min-width: 960px) {
    #home {
        background-size: contain;
    }
    .title {
        margin-top: 25%;
    }
}


/* スクロールをしたら出現する要素にはじめに透過0を指定　*/

.fadeUpTrigger{
    opacity: 0;
}

/* 拡大 */
.zoomIn{
animation-name:zoomInAnime;
animation-duration:0.5s;
animation-fill-mode:forwards;
}

@keyframes zoomInAnime{
    from {
    transform: scale(0.6);
    opacity: 0;
    }

    to {
    transform: scale(1);
    opacity: 1;
    }
}