/* ==========================================================================
   Variables
   ========================================================================== */
:root {
  --color-bg: #A0AEC0;
  --color-text: #1A202C;

  --font-heading: 'Noto Serif JP', serif;
  --font-body: 'Noto Sans JP', sans-serif;
  --font-pixel: 'Press Start 2P', cursive;

  --heading-font-size: 1.5rem;
}

/* ==========================================================================
   Base
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   Layout foundation
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  padding: 24px 0;
}

.site-title {
  font-family: var(--font-pixel);
  line-height: 1.5;
}

.site-title__main {
  font-size: calc(var(--heading-font-size) * 2);
}

.site-title__sub {
  font-size: var(--heading-font-size);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.site-nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

.site-nav__link:hover {
  color: #2B6CB0;
}

.site-nav__link--current {
  font-weight: 700;
  color: #2B6CB0;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 8px;
  background-color: transparent;
  color: var(--color-text);
  font-size: 1.3rem;
  cursor: pointer;
}

/* ==========================================================================
   Content area
   ========================================================================== */
.content-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1em;
  margin-bottom: 40px;
}

.content-row--split {
  display: flex;
  gap: 1em;
}

.content-card {
  background-color: #EDF2F7;
  border-radius: 16px;
  padding: 32px;
}

.content-card--primary {
  flex: 2;
}

.content-card--secondary {
  flex: 1;
}

.content-card--primary,
.content-card--secondary {
  background-color: #FFFFFF;
}

.content-row--split h2 {
  font-size: calc(var(--heading-font-size) * 0.8);
}

.content-wrapper > .content-card > h2 {
  font-size: calc(var(--heading-font-size) * 1.3);
}

.divider {
  border: none;
  border-top: 1px solid rgba(26, 32, 44, 0.35);
  margin-top: 12px;
}

.content-card__text {
  margin-top: 16px;
}

.profile-content {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 20px;
  margin-top: 16px;
}

.profile-content .content-card__text {
  margin-top: 0;
  flex: 1;
  min-width: 200px;
}

.profile-photo {
  width: 96px;
  height: 96px;
  object-fit: cover;
  border-radius: 12px;
  flex-shrink: 0;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  color: #FFFFFF;
  font-size: 0.9rem;
  font-weight: 500;
}

.social-link--email {
  background-color: #DD6B20;
}

.social-link--threads {
  background-color: #38A169;
}

.social-link--linkedin {
  background-color: #2B6CB0;
}

/* Portfolio grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.portfolio-item {
  display: flex;
  flex-direction: column;
  background-color: #FFFFFF;
  border-radius: 12px;
  padding: 20px;
}

.portfolio-item__image {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 8px;
}

.portfolio-item__title {
  margin-top: 12px;
  font-size: 1.05rem;
}

.portfolio-item__text {
  margin-top: 8px;
  font-size: 0.9rem;
}

.portfolio-item__stack,
.portfolio-item__status {
  margin-top: 8px;
  font-size: 0.85rem;
}

.portfolio-item__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #2B6CB0;
}

.portfolio-item__link .material-icons {
  font-size: 1rem;
}

/* Service grid */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.service-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background-color: #FFFFFF;
  border-radius: 12px;
  padding: 20px;
}

.service-item__icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
  font-size: 40px;
  line-height: 1;
  color: #2B6CB0;
}

.service-item__title {
  margin-top: 16px;
  font-size: 1.05rem;
}

.service-item__text {
  margin-top: 8px;
  font-size: 0.9rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  padding: 16px 0;
}

.site-footer__text {
  font-size: 0.85rem;
  text-align: left;
}

/* ==========================================================================
   Contact form
   ========================================================================== */
.contact-step {
  margin-top: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
}

.required-badge {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 4px;
  background-color: #C53030;
  color: #FFFFFF;
  font-size: 0.7rem;
  font-weight: 500;
  vertical-align: middle;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid rgba(26, 32, 44, 0.35);
  border-radius: 8px;
  background-color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-error {
  margin-top: 6px;
  color: #C53030;
  font-size: 0.85rem;
  min-height: 1.2em;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border: none;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
}

.btn--primary {
  background-color: #2B6CB0;
  color: #FFFFFF;
}

.btn--secondary {
  background-color: #FFFFFF;
  color: var(--color-text);
  border: 1px solid rgba(26, 32, 44, 0.35);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.confirm-list {
  margin-top: 8px;
}

.confirm-list__row {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(26, 32, 44, 0.15);
}

.confirm-list__row dt {
  flex: 0 0 160px;
  font-weight: 500;
}

.confirm-list__row dd {
  flex: 1;
  white-space: pre-wrap;
}

.complete-message {
  margin-top: 8px;
}

/* ==========================================================================
   Notices
   ========================================================================== */
.notice-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 16px;
}

.notice-item {
  background-color: #FFFFFF;
  border-radius: 12px;
  padding: 20px;
}

.notice-item__title {
  font-size: 1.05rem;
}

.notice-item__content {
  margin-top: 8px;
  font-size: 0.9rem;
}

.notice-empty,
.notice-error {
  margin-top: 16px;
  font-size: 0.9rem;
}

/* ==========================================================================
   Responsive foundation
   ========================================================================== */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  :root {
    --heading-font-size: 1.1rem;
  }

  .content-row--split {
    flex-direction: column;
  }

  .portfolio-grid,
  .service-grid {
    grid-template-columns: 1fr;
  }

  .confirm-list__row {
    flex-direction: column;
    gap: 4px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    flex-basis: 100%;
  }

  .site-nav.is-open {
    display: block;
    margin-top: 12px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }

  :root {
    --heading-font-size: 0.85rem;
  }
}