/* ============================================================
   Whitepaper Archive
   ============================================================ */

.whitepaper-section {
  padding: 80px 0;
}

.whitepaper-section-inner {
  margin: 0 auto;
  padding: 0 var(--gutter-width);
  max-width: 1264px;
}

.whitepaper-list-section {
  padding: 0 0 96px;
}

.whitepaper-section + .whitepaper-section {
  margin-top: 92px;
}

.whitepaper-section--company {
  background: linear-gradient(360deg, rgba(242, 242, 242, 0) 0%, #f2f2f2 100%);
}

.whitepaper-section__head {
  margin-bottom: 40px;
  text-align: center;
}

.whitepaper-section__title {
  margin: 0;
  font-family: var(--font-ja);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-section__title::after {
  content: '';
  display: block;
  width: 62px;
  height: 2px;
  margin: 14px auto 0;
  background: #222;
}

.single-content {
  padding-top: 0 !important;
}

.whitepaper-grid {
  display: grid;
  gap: 32px;
}

.whitepaper-grid--company {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 74px;
}

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

.whitepaper-card {
  min-width: 0;
  background: #fff;
  border: 1px solid rgba(20, 28, 40, 0.12);
  box-shadow: 0 18px 44px rgba(14, 25, 38, 0.06);
}

.whitepaper-card__thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, #edf3f9 0%, #dfe8f2 100%);
}

.whitepaper-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.whitepaper-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.whitepaper-card__overlay-sub {
  font-family: var(--font-ja);
  font-weight: 700;
  font-size: 14px;
  line-height: 32px;
  color: #fff;
  letter-spacing: 0.12em;
}

.whitepaper-card__overlay-title {
  font-family: var(--font-en);
  font-weight: var(--font-weight-demi);
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.08em;
}

.whitepaper-card__placeholder,
.whitepaper-single__visual-placeholder {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(20, 83, 147, 0.9), rgba(60, 117, 172, 0.72)),
    url('../images/common/bg_logo.png') center / 180px no-repeat;
}

.whitepaper-card__placeholder span,
.whitepaper-single__visual-placeholder span {
  font-family: var(--font-en);
  font-size: 22px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.92);
}

.whitepaper-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 28px 24px 30px;
  text-align: center;
}

.whitepaper-card__title {
  margin: 0;
  font-family: var(--font-ja);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.65;
  letter-spacing: 0.08em;
}

.whitepaper-card__button {
  display: inline-flex;
  min-width: 260px;
  margin: 24px auto 0;
  padding: 17px 32px;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ja);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #fff;
  background: #2c68a4;
  transition:
    background 0.25s ease,
    transform 0.25s ease;
}

.whitepaper-card__button:hover {
  background: #145393;
  transform: translateY(-1px);
}

.whitepaper-card--company .whitepaper-card__thumb {
  aspect-ratio: 16 / 9;
}

.whitepaper-pagination {
  margin: 100px auto 0;
}

/* ============================================================
   Whitepaper Single
   ============================================================ */

.whitepaper-single__header {
  padding-bottom: 24px;
}

.whitepaper-single__header-inner {
  max-width: 1100px !important;
}

.single-title {
  font-size: 24px !important;
}

.whitepaper-single__lead {
  margin-top: 22px;
  max-width: 760px;
  font-size: 16px;
  line-height: 2;
  letter-spacing: 0.08em;
  color: #5c6670;
}

.whitepaper-single__body {
  padding-top: 8px;
}

.whitepaper-single__layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 500px) minmax(400px, 1fr);
  gap: 40px;
  align-items: start;
}

.whitepaper-single__main {
  min-width: 0;
}

.whitepaper-single__sub-title {
  margin: 0 0 18px;
  font-family: var(--font-ja);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-single__preview {
  margin: 0;
  overflow: hidden;
  background: #e6edf4;
  box-shadow: 0 22px 54px rgba(14, 25, 38, 0.09);
}

.whitepaper-single__preview img {
  width: 100%;
  height: auto;
  display: block;
}

.whitepaper-single__section-title {
  font-family: var(--font-ja);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-single__content {
  max-width: none;
  margin: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.whitepaper-consultant {
  margin-top: 44px;
  background: #fff;
  border: 1px solid rgba(20, 28, 40, 0.1);
  box-shadow: 0 18px 44px rgba(14, 25, 38, 0.06);
}

.whitepaper-consultant__accordion {
  padding: 28px;
}

.whitepaper-consultant__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  list-style: none;
}

.whitepaper-consultant__label {
  margin: 0 0 16px;
  font-family: var(--font-ja);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-consultant__summary::-webkit-details-marker {
  display: none;
}

.whitepaper-consultant__summary-icon {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.whitepaper-consultant__summary-icon::before,
.whitepaper-consultant__summary-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 2px;
  background: #145393;
  transform: translate(-50%, -50%);
  transition: transform 0.24s ease;
}

.whitepaper-consultant__summary-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.whitepaper-consultant__accordion[open] .whitepaper-consultant__summary {
  padding-bottom: 20px;
}

.whitepaper-consultant__accordion[open] .whitepaper-consultant__summary-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.whitepaper-consultant__section {
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(20, 28, 40, 0.08);
}

.whitepaper-consultant__body {
  padding-bottom: 4px;
}

.whitepaper-consultant__section + .whitepaper-consultant__profile {
  padding-top: 28px;
}

.whitepaper-consultant__profile {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
}

.whitepaper-consultant__photo img {
  width: 100%;
  height: auto;
  display: block;
}

.whitepaper-consultant__role {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  letter-spacing: 0.08em;
  color: #145393;
}

.whitepaper-consultant__name {
  font-family: var(--font-ja);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-consultant__bio {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  letter-spacing: 0.08em;
  color: #4e5964;
}

.whitepaper-contact {
  display: none;
  margin-top: 36px;
  padding: 28px 30px;
  background: #fff;
  border: 1px solid rgba(20, 28, 40, 0.08);
  box-shadow: 0 18px 44px rgba(14, 25, 38, 0.06);
}

.whitepaper-contact__title,
.whitepaper-contact__number,
.whitepaper-contact__hours {
  margin: 0;
}

.whitepaper-contact__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-contact__number {
  margin-top: 10px;
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: var(--font-weight-demi);
  line-height: 1.3;
  color: #145393;
}

.whitepaper-contact__hours {
  margin-top: 12px;
  font-size: 14px;
  line-height: 2;
  letter-spacing: 0.08em;
  color: #4e5964;
}

.whitepaper-contact--sp {
  display: none;
}

.whitepaper-form-panel {
  padding: 34px 24px;
  background: #fff;
  box-shadow: 0 18px 44px rgba(14, 25, 38, 0.06);
}

.whitepaper-form__form {
  margin-top: 32px;
}

.whitepaper-form__eyebrow {
  font-family: var(--font-en);
  letter-spacing: 0.12em;
  font-size: 14px;
}

.whitepaper-form__shortcode form {
  margin: 0;
}

.whitepaper-form__field {
  margin-top: 18px;
}

.whitepaper-form__field:first-child {
  margin-top: 0;
}

.whitepaper-form__label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.8;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-form__label span {
  color: #b42318;
}

.whitepaper-form input[type='text'],
.whitepaper-form input[type='email'],
.whitepaper-form input[type='tel'],
.whitepaper-form textarea,
.whitepaper-form select {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid rgba(20, 28, 40, 0.2);
  font-size: 15px;
  line-height: 1.6;
  color: #222;
  background: #fff;
}

.whitepaper-form textarea {
  min-height: 160px;
  resize: vertical;
}

.whitepaper-form__field--checks {
  border: 0;
  padding: 0;
}

.whitepaper-form__checks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.whitepaper-form__check,
.whitepaper-form .mwform-checkbox-field label {
  display: flex;
  gap: 4px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.8;
  letter-spacing: 0.08em;
  color: #4e5964;
}

.whitepaper-form .mwform-checkbox-field,
.whitepaper-form .mwform-radio-field {
  display: block;
}

.whitepaper-form .horizontal-item + .horizontal-item {
  margin-left: 0 !important;
}

.whitepaper-form input[type='checkbox'],
.whitepaper-form input[type='radio'] {
  margin-top: 4px;
  appearance: auto;
}

.whitepaper-form__privacy,
.whitepaper-form__memo {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 2;
  letter-spacing: 0.08em;
  color: #4e5964;
}

.whitepaper-form__privacy a {
  color: #145393;
  text-decoration: underline;
}

.whitepaper-form__actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 26px;
}

.whitepaper-form__submit,
.whitepaper-form__actions input[type='submit'],
.whitepaper-form__actions button {
  display: inline-flex;
  width: 100%;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  border: 0;
  font-family: var(--font-ja);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  color: #fff;
  background: #2c68a4;
}

.whitepaper-form__thanks {
  text-align: left;
}

.whitepaper-form__thanks-title {
  margin: 0;
  font-family: var(--font-ja);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: #222;
}

.whitepaper-form__thanks-text {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 2;
  letter-spacing: 0.08em;
  color: #4e5964;
}

.whitepaper-form .error {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: #c00;
}

.whitepaper-form__runtime-error {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: #c00;
}

@media (max-width: 1024px) {
  .whitepaper-grid--company,
  .whitepaper-grid--industry {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .whitepaper-single__layout {
    grid-template-columns: 1fr;
  }

  .whitepaper-single__aside {
    position: static;
  }
}

@media (max-width: 768px) {
  .whitepaper-inner {
    padding-top: 60px;
  }

  .whitepaper-list-section {
    padding-bottom: 72px;
  }

  .whitepaper-section + .whitepaper-section {
    margin-top: 68px;
  }

  .whitepaper-section__head {
    margin-bottom: 28px;
  }

  .whitepaper-section__title {
    font-size: 24px;
  }

  .whitepaper-grid--company,
  .whitepaper-grid--industry {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .whitepaper-grid--company {
    padding: 0;
  }

  .whitepaper-card__body {
    padding: 22px 18px 24px;
  }

  .whitepaper-card__title {
    font-size: 18px;
  }

  .whitepaper-card__button {
    min-width: 100%;
    font-size: 14px;
  }

  .whitepaper-pagination {
    margin-top: 60px;
  }

  .whitepaper-form__title {
    font-size: 20px;
  }

  .whitepaper-single__header {
    padding-top: 44px;
  }

  .whitepaper-single__lead {
    font-size: 14px;
  }

  .whitepaper-single__layout {
    gap: 28px;
    padding-top: 24px;
  }

  .whitepaper-single__sub-title {
    font-size: 22px;
  }

  .whitepaper-consultant {
    padding: 0;
  }

  .whitepaper-consultant__accordion {
    padding: 22px 18px;
  }

  .whitepaper-consultant__summary {
    gap: 16px;
  }

  .whitepaper-consultant__label {
    font-size: 16px;
  }

  .whitepaper-consultant__section + .whitepaper-consultant__profile {
    padding-top: 22px;
  }

  .whitepaper-consultant__profile {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .whitepaper-consultant__role {
    font-size: 13px;
  }

  .whitepaper-consultant__photo {
    max-width: 180px;
  }

  .whitepaper-consultant__name {
    font-size: 18px;
  }

  .whitepaper-contact {
    padding: 22px 18px;
  }

  .whitepaper-contact--pc {
    display: none;
  }

  .whitepaper-contact--sp {
    display: none;
    margin-top: 20px;
  }

  .whitepaper-form-panel {
    padding: 24px 16px;
  }

  .whitepaper-form__thanks-title {
    font-size: 22px;
  }
}