@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;700&display=swap');

:root {
    --primary: #0d6efd;
    --dark: #000;
    --body: #888;
    --box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2)
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.7;
    color: var(--dark);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--dark);
    font-weight: 700;
}

p {
    font-size: 1.2em;
}

a.navbar-brand,
a.nav-link {
    color: var(--dark);
    text-decoration: none;
}

section {
    padding-top: 40px;
    padding-bottom: 40px;
}

.navbar .nav-link {
    color: #000;
    font-size: 14px;
    font-weight: 700;
}

.navbar-brand {
    color: var(--dark);
    font-weight: 700;
}

.hero {
    background-image: url("/img/bg-hero.jpg");
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
    position: relative;
    z-index: 2;
}

.hero::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-color: rgba(128, 128, 128, 0.5);
    z-index: -1;
}

.hero h1, .hero p {
    color: #fff;
}

.hero h1 {
    font-weight: 700;
}

.card-effect {
    box-shadow: var(--box-shadow);
    background-color: #fff;
    padding: 25px;
    transition: all 0.35s ease;
}

.card-effect:hover {
    box-shadow: none;
    transform: translateY(5px);
}

.speaker {
    position: relative;
    overflow: hidden;
}

.speaker::after {
    content: "";
    position: absolute;
    top: -100%;
    left: 0;
    background-color: var(--primary);
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: all 0.35s ease;
    z-index: -1;
}

.speaker:hover h4,
.speaker:hover p {
    color: #fff;
}

.speaker:hover .iconbox {
    background-color: #fff;
    color: var(--primary);
}

.speaker:hover::after {
    opacity: 1;
    top: 0;
}

.iconbox {
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
    background-color: var(--primary);
    border-radius: 100px;
}

.boxicon {
    position: relative;
    overflow: hidden;
}

.boxicon::after {
    content: "";
    position: absolute;
    top: -100%;
    left: 0;
    background-color: var(--primary);
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: all 0.35s ease;
    z-index: -1;
}

.boxicon:hover h4,
.boxicon:hover p {
    color: #fff;
}

.boxicon:hover .iconbox {
    background-color: #fff;
    color: var(--primary);
}

.boxicon:hover::after {
    opacity: 1;
    top: 0;
}

.footer-top {
    color: var(--dark);
}