/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg:          #f8f9fb;
  --color-surface:     #ffffff;
  --color-border:      #e2e6ea;
  --color-text:        #1a1f2e;
  --color-text-muted:  #6b7280;
  --color-accent:      #1e3a5f;
  --color-accent-mid:  #2d5a8e;
  --color-accent-light:#e8f0fa;
  --color-tag-bg:      #eef2f9;
  --color-tag-text:    #2d5a8e;
  --radius-card:       12px;
  --radius-btn:        8px;
  --shadow-card:       0 2px 12px rgba(30,58,95,.08);
  --shadow-card-hover: 0 8px 28px rgba(30,58,95,.16);
  --shadow-header:     0 2px 12px rgba(30,58,95,.10);
  --transition:        .2s ease;
  --font-body:         'Noto Sans JP', sans-serif;
  --container-max:     1100px;
  --section-gap:       96px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body.modal-open { overflow: hidden; }

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

a { color: var(--color-accent-mid); text-decoration: none; }
a:hover { text-decoration: underline; }

ul { list-style: none; }

/* ===== CONTAINER ===== */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ===== SECTION TITLES ===== */
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  display: block;
  margin-top: 8px;
  width: 48px;
  height: 3px;
  background: var(--color-accent-mid);
  border-radius: 2px;
}
.section-subtitle {
  color: var(--color-text-muted);
  margin-bottom: 40px;
  font-size: .95rem;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-weight: 500;
  font-size: .95rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-mid);
  border-color: var(--color-accent-mid);
  box-shadow: 0 4px 16px rgba(30,58,95,.3);
  transform: translateY(-1px);
  text-decoration: none;
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-outline:hover {
  background: var(--color-accent-light);
  text-decoration: none;
}

/* ===== HEADER / NAV ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-header);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-accent);
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--color-accent); text-decoration: none; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #f0f4fb 0%, #ffffff 60%, #e8f0fa 100%);
  padding: 120px 0 100px;
  text-align: center;
}
.hero-decoration {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 80% 20%, rgba(45,90,142,.07) 0%, transparent 70%),
    radial-gradient(ellipse 400px 300px at 10% 80%, rgba(30,58,95,.05) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; }
.hero-eyebrow {
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent-mid);
  margin-bottom: 16px;
}
.hero-name {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 40px;
  line-height: 1.8;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== ABOUT ===== */
.about {
  padding: var(--section-gap) 0;
  background: var(--color-surface);
}
.about-body {
  max-width: 700px;
  margin-top: 32px;
  color: var(--color-text-muted);
  line-height: 1.9;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ===== PROJECTS ===== */
.projects {
  padding: var(--section-gap) 0;
  background: var(--color-bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
  position: relative;
}
.project-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.project-card:focus-visible {
  outline: 2px solid var(--color-accent-mid);
  outline-offset: 2px;
}

/* サムネイル */
.card-thumbnail {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--color-accent-light);
  overflow: hidden;
}
.card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity .2s;
}
.card-placeholder-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  opacity: .35;
  pointer-events: none;
}
/* 画像ロード失敗時はアイコンのみ */
.card-thumbnail.no-image img { opacity: 0; }

.card-body {
  padding: 20px 20px 0;
  flex: 1;
}
.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 4px;
}
.card-subtitle {
  font-size: .8rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.card-tags li {
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  font-size: .72rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
}

.card-detail-btn {
  margin: 16px 20px 20px;
  padding: 10px 16px;
  border-radius: var(--radius-btn);
  background: var(--color-accent-light);
  color: var(--color-accent);
  border: none;
  font-weight: 600;
  font-size: .85rem;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background var(--transition), color var(--transition);
  align-self: flex-start;
}
.card-detail-btn:hover {
  background: var(--color-accent);
  color: #fff;
}

/* ===== SKILLS ===== */
.skills {
  padding: var(--section-gap) 0;
  background: var(--color-surface);
}
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 40px;
}
.skill-category {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}
.skill-category-title {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-accent-mid);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.skill-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: .82rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 100px;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.skill-list li:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-mid);
  color: var(--color-accent);
}

/* ===== PROFILE ===== */
.profile {
  padding: var(--section-gap) 0;
  background: var(--color-bg);
}
.profile-inner {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  margin-top: 40px;
}
.profile-avatar {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--color-accent-light);
  border: 3px solid var(--color-accent-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.profile-initials {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: .05em;
}
.profile-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 4px;
}
.profile-label {
  font-size: .85rem;
  color: var(--color-accent-mid);
  font-weight: 500;
  margin-bottom: 20px;
}
.profile-bio {
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.profile-meta { display: flex; flex-direction: column; gap: 8px; }
.profile-meta-row {
  display: flex;
  gap: 16px;
  font-size: .9rem;
}
.profile-meta-row dt {
  font-weight: 600;
  color: var(--color-accent);
  width: 64px;
  flex-shrink: 0;
}
.profile-meta-row dd { color: var(--color-text-muted); }
.profile-meta-row dd a { color: var(--color-accent-mid); font-weight: 500; }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--color-accent);
  color: rgba(255,255,255,.7);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copy { font-size: .85rem; }
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  color: rgba(255,255,255,.7);
  font-size: .85rem;
  font-weight: 500;
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; text-decoration: none; }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(10,20,40,.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal-overlay[hidden] { display: none; }

/* 左右分割・85vw / 最大82vh */
.modal {
  background: var(--color-surface);
  border-radius: 16px;
  width: 85vw;
  max-width: 1100px;
  height: 82vh;
  max-height: 82vh;
  min-height: 320px;
  display: flex;
  flex-direction: row;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(10,20,40,.4);
}

/* 左パネル：テキスト＋×ボタン */
.modal-left {
  width: 300px;
  flex-shrink: 0;
  padding: 20px 24px 28px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-right: 1px solid var(--color-border);
  position: relative;
}

/* ×ボタン：左パネル内・画像に一切重ならない */
.modal-close {
  align-self: flex-start;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.modal-close:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-color: var(--color-accent-mid);
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.4;
}
.modal-tech {
  font-size: .78rem;
  color: var(--color-accent-mid);
  font-weight: 500;
  line-height: 1.6;
  padding: 8px 10px;
  background: var(--color-accent-light);
  border-radius: 6px;
}
.modal-desc {
  color: var(--color-text-muted);
  line-height: 1.9;
  font-size: .9rem;
  flex: 1;
}
.modal-github { font-size: .88rem; }
.modal-github[hidden] { display: none; }

/* 右パネル：スライドショー (flex column) */
.modal-right {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: #dce8f7;
}

/* 画像エリア：何も重ならないクリーンな表示 */
.slideshow-area {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.slideshow-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #dce8f7, #c8d9f0);
  z-index: 0;
}

.slideshow-img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  padding: 20px;
  box-sizing: border-box;
}

/* ナビゲーションバー：画像の外・下に配置 */
.slideshow-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 10px 20px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}
.slideshow-nav[hidden] { display: none; }

/* 前後ボタン：ナビバー内（画像の外） */
.slide-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-accent);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
}
.slide-btn:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-mid);
  box-shadow: 0 2px 8px rgba(30,58,95,.15);
}

/* 枚数カウンター：ナビバー内 */
.slideshow-counter {
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  min-width: 52px;
  text-align: center;
  letter-spacing: .04em;
}

/* サムネイル帯：一番下 */
.slideshow-thumbs {
  display: flex;
  gap: 8px;
  padding: 10px 14px;
  overflow-x: auto;
  background: rgba(30,58,95,.06);
  border-top: 1px solid var(--color-border);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
  flex-shrink: 0;
}
.slideshow-thumbs[hidden] { display: none; }

.slideshow-thumb {
  flex-shrink: 0;
  width: 72px;
  height: 52px;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  background: var(--color-accent-light);
  padding: 0;
  opacity: .55;
}
.slideshow-thumb:hover { opacity: .85; }
.slideshow-thumb.active { border-color: var(--color-accent-mid); opacity: 1; }
.thumb-bg {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  :root { --section-gap: 64px; }

  .nav-links {
    position: fixed;
    inset: 64px 0 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 40px;
    gap: 32px;
    transform: translateX(100%);
    transition: transform .25s ease;
    box-shadow: -4px 0 20px rgba(0,0,0,.1);
  }
  .nav-links.is-open { transform: translateX(0); }
  .nav-links a { font-size: 1.1rem; }
  .nav-hamburger { display: flex; }

  .hero { padding: 80px 0 64px; }

  .profile-inner { flex-direction: column; gap: 24px; }
  .profile-avatar { width: 96px; height: 96px; }

  /* モーダル：縦積みレイアウトに切り替え */
  .modal {
    flex-direction: column;
    width: 94vw;
    height: 90vh;
  }
  .modal-left {
    width: 100%;
    padding: 16px 20px 14px;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    gap: 10px;
    flex: 0 0 auto;
    max-height: 38%;
    overflow-y: auto;
  }
  .modal-right {
    flex: 1;
    min-height: 0;
  }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; max-width: 280px; }
  .projects-grid { grid-template-columns: 1fr; }
}