.btn {
  display: inline-block;
  background-color: transparent;
  border: none;
  font-weight: 600;
  padding: 8px 28px;
  cursor: pointer;
  transition: all 0.3s;
  color: #111827;
  text-decoration: none !important;
}
.btn:hover {
  background-color: #111827;
  color: #ffffff;
}
.btn.filled {
  background-color: #111827;
  border: 1px solid #111827;
  color: #ffffff;
}
.btn.filled:hover {
  background-color: #ffffff;
  color: #111827;
}

body {
  font-family: "Kameron", "Noto Sans JP", sans-serif;
  color: #111827;
  line-height: 1.8;
}

img {
  max-width: 100%;
  vertical-align: bottom;
}

.content-width, .hero__inner, .philosophy__body, .about__body, .services__catch, .services__lead, .services__grid, .skills__inner, .footer__inner {
  width: 90%;
  margin: 0 auto;
  max-width: 960px;
}

.section-title, .philosophy__title, .about__title, .services__title, .skills__title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 32px;
  text-align: center;
}
@media screen and (min-width: 960px) {
  .section-title, .philosophy__title, .about__title, .services__title, .skills__title {
    font-size: 32px;
  }
}

main {
  padding-top: 76px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 76px;
  background: #ffffff;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
}
@media screen and (min-width: 960px) {
  .header {
    padding: 0 48px;
  }
}
.header__logo {
  display: flex;
  align-items: baseline;
  gap: 6px;
  text-decoration: none;
  font-size: 24px;
  font-weight: 700;
}
@media screen and (min-width: 960px) {
  .header__logo {
    font-size: 32px;
  }
}
.header__logo-first {
  color: #111827;
}
.header__logo-last {
  color: #2563eb;
}
.header__nav {
  display: none;
}
@media screen and (min-width: 960px) {
  .header__nav {
    display: block;
  }
}
.header__ul {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}
.header__li > a {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.header__menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
@media screen and (min-width: 960px) {
  .header__menu-btn {
    display: none;
  }
}
.header__menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: #111827;
}

.hero {
  position: relative;
  overflow: hidden;
  color: #ffffff;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: #111827;
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}
.hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.5);
  z-index: -1;
}
.hero__inner {
  padding: 40px 32px;
  background: rgba(0, 0, 0, 0.45);
  border-radius: 12px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}
.hero__title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}
.hero__role {
  font-size: 28px;
  font-weight: 700;
}
@media screen and (min-width: 960px) {
  .hero__role {
    font-size: 44px;
  }
}
.hero__role-sub {
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1px;
}
@media screen and (min-width: 960px) {
  .hero__role-sub {
    font-size: 17px;
  }
}
.hero__catch {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
}
@media screen and (min-width: 960px) {
  .hero__catch {
    font-size: 18px;
  }
}
.hero__footer {
  position: absolute;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  height: 68px;
  width: 22px;
  overflow: hidden;
}
.hero__downarrow {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 6px;
  animation: kf-arrow-anime 2s linear infinite;
}
.hero__scrolltext {
  position: absolute;
  transform: rotate(90deg);
  color: rgba(255, 255, 255, 0.7);
  left: -8px;
  top: 11px;
  font-size: 12px;
}

@keyframes kf-arrow-anime {
  0%, 50%, 100% {
    transform: translateY(-10%);
  }
  30% {
    transform: none;
  }
}
.philosophy {
  padding: 60px 0;
}
.philosophy__body {
  text-align: center;
  font-size: 15px;
  color: #4b5563;
}
@media screen and (min-width: 960px) {
  .philosophy__body {
    font-size: 17px;
  }
}

.about {
  background: #f3f4f6;
  padding: 60px 0;
}
.about__body p {
  margin-bottom: 20px;
  font-size: 15px;
  color: #4b5563;
}
.about__body p:last-child {
  margin-bottom: 0;
}
@media screen and (min-width: 960px) {
  .about__body p {
    font-size: 16px;
  }
}

.services {
  padding: 60px 0;
}
.services__catch {
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}
@media screen and (min-width: 960px) {
  .services__catch {
    font-size: 22px;
  }
}
.services__lead {
  text-align: center;
  font-size: 14px;
  color: #4b5563;
  margin-bottom: 40px;
}
@media screen and (min-width: 960px) {
  .services__lead {
    font-size: 16px;
  }
}
.services__grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
@media screen and (min-width: 960px) {
  .services__grid {
    flex-direction: row;
  }
}
.services__card {
  background: #ffffff;
  border: 1px solid rgba(17, 24, 39, 0.1);
  border-radius: 8px;
  padding: 24px;
}
@media screen and (min-width: 960px) {
  .services__card {
    flex: 1;
  }
}
.services__card-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid #2563eb;
}
.services__card-desc {
  font-size: 13px;
  color: #4b5563;
  margin-bottom: 12px;
}
.services__card-strength {
  font-size: 13px;
  color: #111827;
}

.skills {
  padding: 60px 0;
}
.skills__inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
@media screen and (min-width: 960px) {
  .skills__inner {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
  }
}
@media screen and (min-width: 960px) {
  .skills__category {
    flex-basis: 47%;
  }
}
.skills__category-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #2563eb;
}
.skills__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.skills__item {
  background: #f3f4f6;
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 13px;
}
.skills__item--highlight {
  background: #2563eb;
  color: #ffffff;
  font-weight: 700;
}
.skills__note {
  font-size: 13px;
  color: #4b5563;
}

.footer {
  background: #111827;
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 24px 24px;
  text-align: center;
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}
@media screen and (min-width: 960px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
  }
}
.footer__logo {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}
.footer__logo-first {
  color: #ffffff;
}
.footer__logo-last {
  color: #2563eb;
}
.footer__ul {
  display: flex;
  gap: 24px;
  list-style: none;
}
.footer__li > a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 13px;
}
.footer__li > a:hover {
  color: #ffffff;
}
.footer__copyright {
  margin-top: 24px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}