/* ===========================================
   株式会社ライトワークス サンプルサイト
   Author: 練尾一真（Nerio Kazuma）
   =========================================== */

/* ----- Design Tokens ----- */
:root {
  --color-base: #FFFFFF;
  --color-sub-base: #F5F7FA;
  --color-text: #1A1A1A;
  --color-text-sub: #5C6B7A;
  --color-accent: #0066CC;
  --color-accent-dark: #003D7A;
  --color-border: #E1E5EA;
  --color-shadow: rgba(0, 30, 60, 0.08);

  --font-heading: "Inter", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;

  --container-max: 1200px;
  --section-py: 96px;
  --header-h: 72px;
}

/* ----- Base ----- */
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-base);
  font-size: 16px;
  letter-spacing: 0.02em;
}

img {
  width: 100%;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ----- Headings ----- */
.section-title {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  margin-bottom: 16px;
  color: var(--color-text);
}

.section-title__en {
  display: block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-lead {
  text-align: center;
  color: var(--color-text-sub);
  margin-bottom: 56px;
  font-size: 15px;
  line-height: 1.9;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 28px;
  }
  .section-lead {
    margin-bottom: 40px;
    font-size: 14px;
  }
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 200px;
  padding: 16px 32px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: 4px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  cursor: pointer;
  text-align: center;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.25);
}
.btn--primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 102, 204, 0.3);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}
.btn--outline:hover {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn--ghost {
  background-color: transparent;
  color: #FFFFFF;
  border: 1px solid #FFFFFF;
}
.btn--ghost:hover {
  background-color: #FFFFFF;
  color: var(--color-accent);
}

/* ===========================================
   Header
   =========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 50;
}

.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
}
.header__logo span {
  color: var(--color-accent);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.header__nav-link {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}
.header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}
.header__nav-link:hover,
.header__nav-link.is-current {
  color: var(--color-accent);
}
.header__nav-link:hover::after,
.header__nav-link.is-current::after {
  transform: scaleX(1);
}

.header__nav-link--cta {
  background-color: var(--color-accent);
  color: #FFFFFF !important;
  padding: 10px 20px;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}
.header__nav-link--cta::after {
  display: none;
}
.header__nav-link--cta:hover {
  background-color: var(--color-accent-dark);
}

/* ----- Burger ----- */
.header__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  z-index: 101;
}
.header__burger span {
  display: block;
  width: 100%;
  height: 1px;
  background-color: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.header__burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header__burger.is-open span:nth-child(2) {
  opacity: 0;
}
.header__burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ----- Overlay ----- */
.header__overlay {
  display: none;
}

@media (max-width: 768px) {
  .header__burger {
    display: flex;
  }
  .header__nav {
    position: fixed;
    top: 0;
    right: 0;
    left: auto;
    width: 280px;
    max-width: 100vw;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    background-color: #FFFFFF;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
    z-index: 100;
  }
  .header__nav.is-open {
    transform: translateX(0);
  }
  .header__nav-link {
    font-size: 17px;
  }
  .header__nav-link--cta {
    padding: 12px 28px;
  }
  .header__overlay {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 99;
  }
  .header__overlay.is-visible {
    opacity: 1;
    visibility: visible;
  }
}

/* ===========================================
   Hero
   =========================================== */
.hero {
  position: relative;
  margin-top: var(--header-h);
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(135deg, rgba(0, 61, 122, 0.85), rgba(0, 102, 204, 0.55)),
    url('https://images.unsplash.com/photo-1497366216548-37526070297c?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  z-index: -1;
}

.hero__inner {
  text-align: center;
  padding: 80px 24px;
  max-width: 900px;
}

.hero__copy {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.06em;
  margin-bottom: 24px;
}
.hero__copy span {
  display: block;
}

.hero__lead {
  font-size: 16px;
  line-height: 2;
  margin-bottom: 40px;
  opacity: 0.95;
}

.hero__actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero {
    min-height: 480px;
  }
  .hero__copy {
    font-size: 30px;
  }
  .hero__lead {
    font-size: 14px;
  }
}

/* ===========================================
   Page Head (下層ページ用)
   =========================================== */
.page-head {
  margin-top: var(--header-h);
  padding: 80px 24px;
  background:
    linear-gradient(135deg, rgba(0, 61, 122, 0.85), rgba(0, 102, 204, 0.55)),
    url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  color: #FFFFFF;
  text-align: center;
}
.page-head__title {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.page-head__sub {
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.9;
}
@media (max-width: 768px) {
  .page-head {
    padding: 64px 24px;
  }
  .page-head__title {
    font-size: 26px;
  }
}

/* ===========================================
   Sections
   =========================================== */
section {
  padding: var(--section-py) 0;
}
@media (max-width: 768px) {
  :root {
    --section-py: 64px;
  }
}

.section--sub {
  background-color: var(--color-sub-base);
}

/* ===========================================
   Service cards (TOP / Services)
   =========================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 1024px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px var(--color-shadow);
}
.card__img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-sub-base);
}
.card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.card:hover .card__img img {
  transform: scale(1.05);
}
.card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}
.card__title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}
.card__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-sub);
  flex: 1;
}
.card__link {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}
.card__link::after {
  content: " →";
  transition: margin-left 0.2s ease;
}
.card:hover .card__link::after {
  margin-left: 4px;
}

/* ===========================================
   Reasons (TOP)
   =========================================== */
.reasons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
@media (max-width: 768px) {
  .reasons {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.reason {
  text-align: center;
  padding: 32px 24px;
  background-color: #FFFFFF;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}
.reason__num {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.reason__title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.5;
}
.reason__desc {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-sub);
}

/* ===========================================
   News list
   =========================================== */
.news-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}
.news-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}
.news-item:hover {
  background-color: var(--color-sub-base);
}
.news-item__date {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-sub);
  min-width: 100px;
}
.news-item__cat {
  display: inline-block;
  min-width: 100px;
  padding: 4px 12px;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 999px;
}
.news-item__cat--release {
  color: #FFFFFF;
  background-color: var(--color-accent);
}
.news-item__cat--info {
  color: var(--color-text-sub);
  border-color: var(--color-text-sub);
}
.news-item__cat--media {
  color: #C25E00;
  border-color: #C25E00;
}
.news-item__title {
  font-size: 15px;
  font-weight: 500;
  flex: 1;
  line-height: 1.6;
}
@media (max-width: 768px) {
  .news-item {
    flex-wrap: wrap;
    gap: 8px 16px;
    padding: 20px 0;
  }
  .news-item__date {
    min-width: auto;
    font-size: 12px;
  }
  .news-item__cat {
    min-width: auto;
    padding: 2px 10px;
    font-size: 10px;
  }
  .news-item__title {
    width: 100%;
    font-size: 14px;
  }
}

/* ===========================================
   CTA Section
   =========================================== */
.cta-section {
  background:
    linear-gradient(135deg, rgba(0, 61, 122, 0.92), rgba(0, 102, 204, 0.85)),
    url('https://images.unsplash.com/photo-1521737711867-e3b97375f902?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  color: #FFFFFF;
  text-align: center;
}
.cta-section__title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.cta-section__lead {
  font-size: 15px;
  line-height: 2;
  margin-bottom: 32px;
  opacity: 0.95;
}
@media (max-width: 768px) {
  .cta-section__title {
    font-size: 24px;
  }
}

/* ===========================================
   About Page
   =========================================== */
.greeting {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 768px) {
  .greeting {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
.greeting__img {
  border-radius: 8px;
  overflow: hidden;
}
.greeting__img img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.greeting__title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.5;
}
.greeting__body p {
  font-size: 15px;
  line-height: 2;
  color: var(--color-text-sub);
  margin-bottom: 20px;
}
.greeting__sign {
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-text);
}
.greeting__sign strong {
  font-size: 18px;
  font-weight: 700;
  margin-left: 8px;
}

/* ----- Mission / Vision / Value ----- */
.mvv {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 768px) {
  .mvv {
    grid-template-columns: 1fr;
  }
}
.mvv__card {
  background-color: #FFFFFF;
  padding: 40px 28px;
  border-radius: 8px;
  border-top: 4px solid var(--color-accent);
  text-align: center;
}
.mvv__label {
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.2em;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.mvv__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}
.mvv__desc {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-sub);
}

/* ----- Company Table ----- */
.company-table {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
}
.company-table tr {
  border-bottom: 1px solid var(--color-border);
}
.company-table th,
.company-table td {
  padding: 20px 24px;
  text-align: left;
  font-size: 15px;
  vertical-align: top;
}
.company-table th {
  width: 200px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-sub-base);
}
.company-table td {
  color: var(--color-text-sub);
  line-height: 1.8;
}
@media (max-width: 600px) {
  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
  }
  .company-table th {
    border-bottom: 0;
  }
}

/* ===========================================
   Services Page
   =========================================== */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 80px;
}
.service-detail:last-child {
  margin-bottom: 0;
}
.service-detail--reverse {
  direction: rtl;
}
.service-detail--reverse > * {
  direction: ltr;
}
@media (max-width: 768px) {
  .service-detail,
  .service-detail--reverse {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 56px;
    direction: ltr;
  }
}

.service-detail__img {
  border-radius: 8px;
  overflow: hidden;
}
.service-detail__img img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.service-detail__label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.service-detail__title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.4;
}
.service-detail__desc {
  font-size: 15px;
  line-height: 2;
  color: var(--color-text-sub);
  margin-bottom: 20px;
}
.service-detail__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.service-detail__list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  color: var(--color-text);
}
.service-detail__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 14px;
  height: 2px;
  background-color: var(--color-accent);
}

/* ===========================================
   Contact Page
   =========================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.contact-info {
  background-color: var(--color-sub-base);
  padding: 40px 32px;
  border-radius: 8px;
}
.contact-info__title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-accent);
}
.contact-info dl {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px 12px;
}
.contact-info dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  padding-top: 4px;
}
.contact-info dd {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ----- Form ----- */
.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form__row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}
.form__label .required {
  color: #D93026;
  font-size: 12px;
  margin-left: 6px;
}
.form__input,
.form__textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 15px;
  background-color: #FFFFFF;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form__input:focus,
.form__textarea:focus {
  outline: 0;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}
.form__textarea {
  min-height: 160px;
  resize: vertical;
}
.form__note {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-top: -4px;
}
.form__actions {
  text-align: center;
  margin-top: 12px;
}
.form__message {
  display: none;
  padding: 16px 20px;
  background-color: #FFF4E5;
  border: 1px solid #F0B765;
  border-radius: 4px;
  color: #8A5500;
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
}
.form__message.is-visible {
  display: block;
}

/* ===========================================
   FAQ
   =========================================== */
.faq {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 24px 0;
}
.faq-item__q {
  display: flex;
  gap: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  align-items: flex-start;
  list-style: none;
  position: relative;
  padding-right: 32px;
}
.faq-item__q::-webkit-details-marker {
  display: none;
}
.faq-item__q::before {
  content: "Q.";
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-weight: 700;
  flex-shrink: 0;
}
.faq-item__q::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-size: 24px;
  color: var(--color-accent);
  transition: transform 0.2s ease;
  line-height: 1;
}
.faq-item[open] .faq-item__q::after {
  content: "−";
}
.faq-item__a {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-sub);
}
.faq-item__a::before {
  content: "A.";
  color: var(--color-text-sub);
  font-family: var(--font-heading);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===========================================
   Footer
   =========================================== */
.footer {
  background-color: #0E1620;
  color: #B7C2CF;
  padding: 64px 0 32px;
}
.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 56px;
  margin-bottom: 48px;
}
@media (max-width: 768px) {
  .footer__top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
.footer__logo {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}
.footer__logo span {
  color: var(--color-accent);
}
.footer__desc {
  font-size: 13px;
  line-height: 1.8;
  color: #8895A6;
}
.footer__col-title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: #FFFFFF;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__list a {
  font-size: 13px;
  color: #B7C2CF;
  transition: color 0.2s ease;
}
.footer__list a:hover {
  color: var(--color-accent);
}
.footer__bottom {
  border-top: 1px solid #1F2A38;
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  color: #6B7787;
  line-height: 1.9;
}
.footer__bottom .note {
  margin-top: 12px;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.04);
  border-radius: 4px;
  font-size: 11px;
  color: #8895A6;
  display: inline-block;
  max-width: 100%;
}

/* ===========================================
   Utilities
   =========================================== */
.text-center { text-align: center; }
.mb-40 { margin-bottom: 40px; }
.mb-56 { margin-bottom: 56px; }