:root {
  --bg: #f4f4f0;
  --bg2: #071736;
  --paper: #ffffff;
  --paper2: #fafaf5;
  --text: #333;
  --text2: #585858;
  --muted: #566072;
  --line: #e7ecf3;
  --brand: #002B5B;
  --accent: #2E5A5E;
  --accent2: #a5ffff;
  --brand2: #e1c409;
  --blue: #a0ced3;
  --red: #C2413A;
  --btn-red: #ba0001;
  --radius: 16px;
  --shadow: 0 3px 8px rgba(0, 0, 0, .08);
  --shadow2: 0 3px 8px rgba(0, 0, 0, .16);
  --container: 1120px;
  --ease: 0.3s ease-out;
  --font-ja: "Noto Sans JP", system-ui, -apple-system, "Hiragino Sans", sans-serif;
  --font-en: "Manrope", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  --font-serif: "Noto Serif JP", serif;
}

* {
  box-sizing: border-box
}

html,
body {
  height: 100%
}

html {
  font-size: clamp(15px, 1.1vw, 18px)
}

body {
  margin: 0;
  font-family: var(--font-ja);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  letter-spacing: 0.05em;
  font-weight: 400;
  line-break: strict;
  word-break: auto-phrase;
  font-feature-settings: "palt";
}

.en {
  font-family: var(--font-en);
}

a {
  color: inherit;
  text-decoration: none;
  display: block;
}

p {
  font-size: 1rem;
  color: var(--text);
}

.br_sp,
.br_xs,
.br_tb,
.br_dt,
.br_540 {
  display: none;
}


/* 全体の調整
===============================*/
.seminar-outer {
  display: flex;
  flex-direction: row;
  justify-content: left;
  min-height: 100vh;
}

.seminar-sidebar {
  width: clamp(290px, 22vw, 380px);
  flex: 0 0 auto;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  border-right: 1px solid var(--line);
}

.seminar-main {
  flex: 1 1 auto;
  min-width: 0;
  margin-left: clamp(290px, 22vw, 380px);
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}

.small {
  font-size: 12px
}

.muted {
  color: var(--muted)
}

.left {
  text-align: left;
}

.muted--light {
  color: rgba(255, 255, 255, .78)
}

.strong {
  font-weight: bold;
}

.w-full {
  width: 100%
}

.section {
  padding: 4em 0
}

.section--light {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line)
}

.section--dark {
  background: radial-gradient(1200px 600px at 20% 10%, rgba(47, 124, 246, .22), transparent 60%),
    radial-gradient(900px 520px at 80% 40%, rgba(107, 228, 255, .18), transparent 55%),
    linear-gradient(180deg, var(--brand), var(--bg2));
  color: #fff;
}

.center {
  text-align: center;
}

h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: -.01em;
  font-weight: 600;
  color: var(--brand);
}

.h2--light {
  color: #fff;
}

.section-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.section-title__kicker {
  font-size: 0.66em;
  font-weight: 800;
  letter-spacing: .22em;
  color: var(--muted);
}

.section-title__kicker--light {
  color: var(--brand2);
}

.section-title__line {
  display: block;
  width: 60px;
  height: 1px;
  background: var(--accent);
}

.h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.lead {
  margin: 0 0 1.5rem;
  color: var(--text2);
}

.lead--light {
  color: rgba(255, 255, 255, .82)
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr))
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr))
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr))
}


/* sidebar
=======================================*/
.seminar-sidebar__item h2 {
  text-align: center;
  font-size: 1.25rem;
  background-color: #e5eeee;
  padding: 0.8em;
  border-bottom: 1px solid var(--line);
}

.seminar-sidebar__info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.2rem;
  padding: 1rem;
}

.seminar-sidebar__info dt {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 5px;
  font-weight: 500;
}

.seminar-sidebar__info dd {
  font-size: 1.2rem;
  color: var(--brand);
  line-height: 1.3;
  font-weight: 600;
}

.speakers a {
  color: var(--brand);
  text-decoration: underline;
  font-size: 1.2rem;
}

.speakers a:hover {
  color: var(--accent);
}

.line {
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--line);
  width: 100%;
}

.seminar-sidebar .btn--primary {
  font-size: 1.3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.seminar-sidebar__recommend dd {
  font-size: 1rem;
  letter-spacing: -0.04em;
}

.note {
  font-size: 0.6em;
  line-height: 1.4;
  color: var(--paper);
  font-weight: 300;
  display: block;
}

.seminar-sidebar__strong {
  text-align: center;
  color: var(--red);
}

dd.seminar-sidebar__date {
  font-size: 1.33rem;
  letter-spacing: 0.1em;
}

.card__actions {
  padding: 0 1rem;
}

dd.free {
  background-color: var(--brand2);
  border-radius: 100px;
  padding: 0.3em 1em;
  display: inline-block;
  font-weight: 400;
}

.card__actions {
  display: flex;
  flex-direction: column;
  gap: 1em;
}


/* header
=======================================*/
.header {
  position: fixed;
  top: 0;
  left: clamp(290px, 22vw, 380px);
  right: 0;
  z-index: 40;
  height: var(--header-h);
  background: rgba(255, 255, 255, .8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 10px 0;
}

.header-note {
  display: none;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  padding: 5px;
  column-gap: 1rem;
  row-gap: 0;
  flex-wrap: wrap;
  background-color: var(--accent);
}

.header-note p {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: .15em;
  color: #fff;
  line-height: 1.2;
}

.text-l {
  font-size: 1.2em;
  font-weight: 800;
}

.text-s {
  font-size: 0.8em;
}

.brand {
  display: flex;
  align-items: center;
}

.brand img {
  width: 100px;
}

.nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.nav a {
  font-size: 0.8rem;
  color: var(--text);
  padding: 0.5em 1em;
  border-top: 2px solid transparent;
  border-bottom: 2px solid transparent;
  transition: 0.3s ease;
}

.nav a:hover {
  border-bottom: 2px solid var(--brand2);
}

.header__cta {
  display: flex;
  gap: 1em;
}

.header__cta .btn {
  font-size: clamp(13px, 20/1500*100vw, 20px);
}

.hamburger {
  display: none;
  margin-left: 8px;
  width: 44px;
  height: 40px;
  cursor: pointer;
  background: transparent;
  border: 0;
  position: relative;
}

.hamburger span {
  display: block;
  height: 2px;
  width: 18px;
  background: var(--accent);
  margin: 5px auto;
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
  transform-origin: center;
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.mobile-menu__inner {
  padding: 14px 0 18px;
  display: grid;
}

.mobile-menu__link {
  padding: 10px 12px;
}

.mobile-menu__link:hover {
  color: var(--accent);
}

.mobile-menu__cta {
  padding: 0 12px 1rem;
}

.mobile-menu__cta .strong {
  color: var(--red);
}

.mobile-menu__cta .btn--primary {
  padding: 1rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: fit-content;
}

.mobile-menu__recommend {
  padding: 1rem;
  background-color: var(--blue);
  width: fit-content;
  margin-left: 12px;
}

.mobile-menu__recommend dt {
  font-size: 0.9rem;
  color: var(--muted);
}

.mobile-menu__recommend dd {
  font-weight: 600;
}


/* ボタン
=============================*/
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5em 1em;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--ease);
  user-select: none;
  position: relative;
}


.btn--primary {
  background: var(--btn-red);
  color: var(--paper);
  font-weight: 800;
  padding: 14px 22px;
  transition: 0.2s ease-in;
  box-shadow: 3px 3px 0 var(--text);
}

.btn--primary:hover {
  transform: translate(3px, 3px);
  box-shadow: none;
}

.btn--ghost {
  border: 1px solid var(--brand);
  color: var(--brand);
}

.btn--ghost:hover {
  background: var(--brand);
  color: #fff;
}

.btn--text {
  font-size: 1.3rem;
  color: var(--btn-red);
  padding-top: 1rem;
}

.btn--text:hover {
  color: var(--brand);
}

.btn--text__accent {
  color: var(--accent);
}

.btn--text__accent:hover {
  color: var(--brand2);
}


/* hero
=======================================*/
.hero__container {
  width: min(1200px, calc(100% - 40px));
  margin: 4rem auto;
  text-align: center;
}

.hero {
  position: relative;
  padding: 100px 0 30px;
  overflow: hidden;
  background: linear-gradient(rgba(255, 255, 255, .7), rgba(255, 255, 255, .7)), url(../images/fv.png);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.hero__copy {
  font-size: clamp(30px, 4.2vw, 50px);
}

.hero__kicker {
  font-size: 0.8em;
  font-weight: 600;
  letter-spacing: 0.2em;
  display: inline-block;
  color: var(--bg2);
  line-height: 1;
  padding: 0.1em 0.3em 0.2em 0.4em;
  background-color: rgba(255, 255, 255, 0.8);
  border-top: var(--accent) 1px solid;
  border-bottom: var(--accent) 1px solid;
  margin-bottom: 0.8em;
}

.hero__title {
  line-height: 1.2;
  letter-spacing: 0.1em;
  margin: 0 0 0.8em;
  font-weight: 600;
  color: var(--paper);
  background-color: var(--brand);
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.45);
  display: inline-block;
  line-height: 1.2;
  font-weight: 700;
  padding: 0.1em 0.3em 0.2em 0.4em;
}

.accent-italic {
  font-size: 1.1em;
  font-style: italic;
  padding-right: 8px;
  font-weight: 500;
  letter-spacing: 0.2em;
}

.hero__title--sub {
  font-size: 0.65em;
  line-height: 1.3;
  color: rgba(0, 43, 91, .85);
  font-weight: 500;
  text-shadow: 0 1px 0 rgba(255, 255, 255, .5);
}

.marker {
  background: linear-gradient(transparent 70%, rgba(255, 223, 13, 0.8) 70%);
  display: inline;
  background-repeat: no-repeat;
  background-size: 0% 100%;
  transition: background-size 1.8s;
  padding: 0 5px;
  margin: 0 3px;
  font-weight: 600;
}

.marker.on {
  background-size: 100% 100%;
}

.hero__speaker {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  justify-content: center;
}

.hero__speaker img {
  width: auto;
  height: clamp(180px, 20vw, 220px);

}

/* ===== Hero facts: logo band ===== */
.hero__facts {
  background-color: rgba(255, 255, 255, .88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 10px 20px;
  margin-top: -1rem;
}

.cohost__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-width: 0;
}

.cohost__logo {
  height: 28px;
  width: auto;
  object-fit: contain;
  display: block;
  max-width: 220px;
}

.cohost__logo--iu,
.cohost__logo--funai {
  height: 24px;
  max-width: 150px;
}

.cohost__sep {
  font-weight: 300;
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
  user-select: none;
}

.cohost__logos--item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  justify-content: center;
}

.cohost__logos--item .speaker-name {
  margin: 0;
  text-align: center;
}


/* Recommended
===========================================*/
.recommended {
  background-color: #F7F7F2;
  background-image:
    radial-gradient(1200px 600px at 18% 12%, rgba(0, 0, 0, .035), transparent 60%),
    radial-gradient(900px 520px at 82% 88%, rgba(0, 0, 0, .028), transparent 55%),
    linear-gradient(180deg, rgba(255, 255, 255, .55), rgba(255, 255, 255, 20));
}

.recommended--note {
  background-color: var(--paper);
  width: 100%;
  max-width: 760px;
  padding: 2rem;
  margin: auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .06);
  border: 0.5px solid var(--line);
  border-left: 1rem solid var(--accent);
}

.recommended h3 {
  font-size: 1.3rem;
  margin-bottom: 1em;
  color: var(--brand);
}

.recommended--list {
  width: fit-content;
  margin: 0 auto 1rem;
}

.recommended--list li {
  padding: 3px 0 3px 1.5em;
  font-size: 1.2rem;
  list-style: none;
  text-align: left;
  background: url('../images/hand-icon.png') left 0px top 0.5em no-repeat;
  background-size: 1.1em auto;
}

.recommended p {
  color: var(--brand2);
  font-weight: 600;
}


/* pain
===========================================*/
.pain .strong {
  color: var(--red);
}

.pain .lead {
  color: var(--text);
  font-size: 1.1rem;
  padding-top: 1em;
}

.pain .strong {
  font-size: 1.2rem;
}


/* examples
===========================================*/
#examples {
  background-color: var(--paper2);
  position: relative;
}

#examples h3 {
  font-size: 1.3em;
}

.examples-wrap {
  gap: 2em;
  padding-top: 2em;
  margin-bottom: 3em;
}

.examples-block {
  align-items: center;
  display: flex;
  flex-direction: row;
  justify-content: center;
  gap: calc(1em);
}

.examples-block h3.h3 {
  margin: 0;
}

.callout--box {
  position: absolute;
  top: 10%;
  left: 10%;
  transform: rotate(-5deg);
}

.callout {
  position: relative;
  max-width: 220px;
  padding: 0.7em 1em;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--accent);
}

.callout::after {
  content: "";
  position: absolute;
  left: 18px;
  bottom: -8px;
  width: 14px;
  height: 14px;
  background: #fff;
  border-left: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  transform: rotate(-45deg);
}

.callout__text {
  margin: 0;
  font-size: 14px;
  font-weight: 800;
  color: var(--brand);
}

.card--shadow {
  padding: 1em;
  border: 1px solid var(--text);
  box-shadow: 3px 3px 0 var(--accent);
  position: relative;
  background-color: rgba(255, 255, 255, .6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.card--shadow img {
  width: 3em;
  position: absolute;
  top: -1.5em;
  left: -1em;
  background-color: var(--accent);
  padding: 10px;
  border-radius: 50%;
  vertical-align: middle;
}

.triangle-right {
  width: 0;
  height: 0;
  border-left: 1.5em solid transparent;
  border-right: 1.5em solid transparent;
  border-top: 1.4em solid var(--text);
  transform: rotate(270deg);
}

.list li {
  padding: 3px 0 3px 1.5em;
  font-size: 1rem;
  list-style: none;
  text-align: left;
  background: url('../images/check.svg') left 0px top 0.5em no-repeat;
  background-size: 1.1em auto;
}


/* why
===========================================*/
#why {
  background-color: var(--bg);
}

.why-wrap {
  position: relative;
  gap: 2em;
  padding: 2em 0;
}

.why-wrap .card {
  padding-top: 2em;
}

.card {
  background-color: rgba(255, 255, 255, .6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 1.5em;
  box-shadow: var(--shadow2);
  border: 2px solid var(--bg2);
  width: fit-content;
  margin: 0 auto;
}

.step {
  width: 2em;
  height: 2em;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  font-weight: 900;
  font-size: 1.5rem;
  position: absolute;
  top: 0;
  left: 0;
}

.why-wrap h3 {
  font-size: 1.3rem;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--brand2);
}

.why-wrap .card {
  width: 100%;
}

.banner__text {
  color: var(--paper);
  font-size: 1.4rem;
  text-align: center;
  line-height: 3;
}

.banner__text span {
  color: var(--brand2);
}

.banner {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  background-color: var(--accent);
  padding: 1em 20px;
}

.banner::before,
.banner::after {
  width: 3px;
  height: 4em;
  content: "";
  background-color: var(--paper);
}

.banner::before {
  margin-right: 2em;
  transform: rotate(-30deg);
}

.banner::after {
  margin-left: 1.1em;
  transform: rotate(30deg);
}


/* movie
===========================================*/
.movie--item {
  width: 100%;
  aspect-ratio: 16 / 9;
  max-width: 500px;
  margin: 0 auto;
}

.movie--item iframe {
  width: 100%;
  height: 100%;
}

.movie--item h3 {
  font-size: 1.1rem;
  color: var(--blue);
  margin-bottom: 0.5em;
}


/* facts
===========================================*/
.card--dark {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .10);
  box-shadow: none;
}

.paper {
  background-color: #fffaf5;
  background-image: linear-gradient(to right, rgba(102, 135, 255, 0.1) 1px, transparent 1px), linear-gradient(to bottom, rgba(102, 135, 255, 0.1) 1px, transparent 1px);
  background-size: 20px 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, .16);
  padding: 3em 2em 2em;
  margin: 0 auto 3rem;
  position: relative;
}

.paper--text {
  font-family: var(--font-serif);
  text-align: left;
  font-size: 1.2rem;
  margin: auto;
  line-break: normal;
  word-break: break-word;
}

.tape {
  position: absolute;
  top: -0.75em;
  left: 50%;
  transform: translateX(-50%) rotate(-3deg);
  background-color: rgba(255, 255, 255, .4);
  border-left: 2px dotted rgba(0, 0, 0, .1);
  border-right: 2px dotted rgba(0, 0, 0, .1);
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
  width: 10rem;
  height: 2rem;
}

.stat_wrap {
  display: flex;
  flex-direction: row;
}

.stat_wrap .card {
  flex: 1;
  min-width: 0;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.stat__num {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -.02em;
}

.stat__label {
  font-weight: 600;
  color: var(--brand2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.stat img {
  width: 80px;
  height: auto;
}

.stat__text {
  text-align: center;
  margin-top: auto;
}


/* benefit
===========================================*/
#benefit {
  background-color: var(--paper2);
}

.benefit-list {
  padding: 2em 0 0;
  width: fit-content;
  margin: auto;
  column-gap: 2rem;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
}

.benefit-list li {
  padding: 3px 0 3px 2.3em;
  font-size: 1.5rem;
  font-weight: 600;
  list-style: none;
  text-align: left;
  background: url('../images/present1.png') left 0px top 0.5em no-repeat;
  background-size: 2em auto;
  margin-bottom: 1em;
  min-width: 260px;
}

.benefit-list li.present-2 {
  background: url('../images/present2.png') left 0px top 0.5em no-repeat;
  background-size: 2em auto;
}

.benefit-list li.present-3 {
  background: url('../images/present3.png') left 0px top 0.5em no-repeat;
  background-size: 2em auto;
}

.benefit-list li span {
  font-weight: 400;
  font-size: 0.6em;
  display: block;
  color: var(--accent);
  line-height: 1.2;
}

.benefit-list__img img {
  max-width: 300px;
}


/* cta
===========================================*/
#cta .btn--primary {
  font-size: 1.8rem;
  margin-bottom: 1em;
  padding: 0.3em 2em;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
}

.cta-list {
  width: fit-content;
  margin: 0 auto;
  color: rgba(255, 255, 255, .85)
}

.cta-text {
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 1em;
  font-weight: 500;
  letter-spacing: 0.1em;
}


/* speaker
===========================================*/
#speaker {
  background-color: var(--paper);
}

.speaker-box {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

.speaker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 2em;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.speaker-card.top {
  margin-bottom: 2em;
}

.speaker-photo {
  width: 100%;
  height: 180px;
  overflow: hidden;
  flex-shrink: 0;
  border: 0.5px solid var(--brand);
}

.speaker-photo img {
  object-fit: contain;
  width: 100%;
  height: 100%;
}

.speaker-body {
  text-align: left;
}

.speaker-name h3 {
  font-size: 1.3em;
  font-weight: 700;
  margin-bottom: 5px;
}

.speaker-name h3 span {
  font-size: 0.7em;
}

.speaker-name p {
  font-size: 0.6em;
  color: var(--muted);
  line-height: 1.2;
}

.speaker-name {
  margin-bottom: 1em;
}

.speaker-desc {
  margin-bottom: 1.5em;
  word-break: normal;
  font-size: 0.77em;
}

.speaker-links {
  display: flex;
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
  gap: 1em;
}

.speaker-links a {
  border: 0.5px solid var(--brand);
  font-size: 0.9em;
  line-height: 1;
  padding: 0.8em 1em;
  transition: ease 0.2s;
}

.speaker-links a:hover {
  background-color: var(--brand);
  color: var(--paper);
}


/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: clamp(20px, 4vw, 32px);
  right: clamp(20px, 4vw, 32px);
  background-color: var(--brand);
  color: white;
  border: none;
  border-radius: 50%;
  width: clamp(48px, 8vw, 56px);
  height: clamp(48px, 8vw, 56px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--accent);
  transform: scale(1.1);
}


/* footer
===========================================*/
.footer {
  padding: 2em 20px;
  border-top: 1px solid var(--brand);
  background: var(--bg2);
}

small {
  color: var(--paper);
}

/* slow fade base */
.slow-fade {
  opacity: 0;
  transition: opacity 1.6s ease;
}

.slow-fade.is-visible {
  opacity: 1;
}

/* ================= breakpoints================== */

@media (max-width: 1130px) {
  .br_dt {
    display: block;
  }

  .why-wrap h3 {
    line-height: 1.1;
  }

  .callout--box {
    top: 5%;
    left: 5%;
  }
}

@media (max-width: 1024px) {
  .header {
    left: 0;
  }

  .header__cta .btn {
    font-size: 1.2rem;
  }

  .header-note {
    display: flex;
  }

  .seminar-sidebar {
    display: none;
  }

  .seminar-outer {
    flex-direction: column;
  }

  .seminar-main {
    margin: 0;
  }

  .hero__container--item {
    flex-direction: column;
  }

  .br_dt {
    display: none;
  }

  .callout--box {
    top: 8%;
    left: 10%;
  }
}

@media (max-width: 980px) {
  .br_tb {
    display: block;
  }

  .br_dt {
    display: block;
  }

  .split {
    grid-template-columns: 1fr
  }

  .nav {
    display: none
  }

  .hamburger {
    display: inline-block
  }

  .header__cta {
    margin-left: auto
  }

  .seminar-table th,
  .seminar-table td {
    padding: 0.7em 0.6em;
  }

  .stat_wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .card--dark {
    width: 100%;
  }

}

@media (max-width: 768px) {
  .br_sp {
    display: block;
  }

  .hero__container {
    width: calc(100% - 28px);
    margin: 3rem auto;
  }

  .hero__container--item {
    padding: 0;
  }

  .hero__facts-inner {
    grid-template-columns: 1fr;
  }

  .hero__facts .hero__facts-inner {
    justify-items: center;
    text-align: center;
    gap: 3px;
  }

  .hero__facts .cohost__logos {
    justify-content: center;
  }

  .hero__facts .cohost__label {
    justify-self: center;
  }

  .hero__facts {
    padding: 10px 20px;
  }

  .flow {
    flex-direction: column;
    align-items: center;
  }

  .grid--3 {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto 3em;
  }

  .grid--2 {
    grid-template-columns: 1fr;
  }

  .examples-block {
    flex-direction: column;
  }

  .triangle-right {
    transform: rotate(360deg);
  }

  .why-wrap .card {
    max-width: 500px;
  }

  .benefit-list {
    flex-direction: column;
  }

  .benefit-list li {
    line-height: 1.2;
    background: url('../images/present1.png') left 0px top 8px no-repeat;
    background-size: 2em auto;
  }

  .benefit-list li span {
    padding-top: 8px;
  }

  .speaker-box {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto 3em;
  }

  .banner__text {
    line-height: 1.3;
  }

  .callout--box {
    top: 2%;
  }

  .movie--item {
    max-width: 500px;
  }

  .fixed-cta {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    position: fixed;
    left: 12px;
    bottom: calc(12px + env(safe-area-inset-bottom));
    z-index: 100;
    padding: 12px 16px;
    background: var(--btn-red);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    font-size: 1rem;
  }

}

@media (max-width: 640px) {
  .container {
    width: calc(100% - 28px)
  }

  .cohost__logo {
    height: 24px;
    max-width: 200px;
  }

  .cohost__logo--iu {
    height: 22px;
    max-width: 240px;
  }

  .topbar__text {
    display: none
  }

  .stat_wrap {
    grid-template-columns: 1fr;
  }

  .compare {
    grid-template-columns: 1fr
  }

  .header__cta {
    display: none
  }

  .callout--box {
    left: 1%;
  }

  .recommended h3 {
    line-height: 1.2;
  }

}

@media (max-width: 540px) {
  .hero__speaker img {
    height: clamp(110px, 180/540*100vw, 180px);
  }

  .hero__facts {
    margin-top: 0;
  }

  .hero__facts .cohost__logos {
    gap: 6px;
    justify-content: space-around;
  }

  .cohost__logo {
    height: clamp(12px, 24/540*100vw, 24px);
    max-width: 90px;
  }

  .speaker-name h3 {
    font-size: clamp(12px, 19/540*100vw, 19px);
    margin: 0;
  }

  .cohost__logos--item {
    gap: 4px;
  }

  .cohost__sep {
    font-size: 1rem;
  }

  .speaker-name p {
    display: none;
  }

  .br_540 {
    display: block;
  }
}

@media (max-width: 480px) {

  .hero__copy {
    font-size: clamp(22px, 35/480*100vw, 35px);
  }

  h2 {
    line-height: 1.3;
    padding: 5px 1em 8px;
  }

  .benefit-list__img img {
    max-width: 260px;
  }

  .br_xs {
    display: block;
  }

  #cta .btn {
    font-size: 1.7rem;
  }

  .callout--box {
    top: 0;
  }

}