/* =========================================
   Font Face (Variable Fonts)
========================================= */
@font-face {
  font-style: normal;
  font-weight: 100 900;
  font-family: "Noto Sans JP";
  font-display: swap;
  src: url("../fonts/NotoSansJP-VariableFont_wght.ttf") format("truetype");
}

@font-face {
  font-style: normal;
  font-weight: 100 900;
  font-family: "Playfair Display";
  font-display: swap;
  src: url("../fonts/PlayfairDisplay-VariableFont_wght.ttf") format("truetype");
}

/* =========================================
   Variables & Reset
========================================= */
:root {
  /* Colors */
  --c-main: #007bff;
  --c-main-light: #e6f2ff;
  --c-main-gradient: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
  --c-bg: #ffffff;
  --c-bg-sub: #f8f9fa;
  --c-bg-video: #333333;
  --c-warning-bg: #fff8e1;
  --c-text-main: #2d3436;
  --c-text-light: #636e72;
  --c-text-muted: #aaaaaa;
  --c-text-link: #ffffff;
  --c-text-skills: #82aaff;
  --c-border: #eeeeee;
  --c-border-input: #dddddd;
  --c-border-warning: #f0c36d;
  --c-border-dark: #e5e5e5;
  --c-accent-orange: #ff7675;
  --c-modal-close: #666666;
  --c-modal-close-hover: #000000;
  --rgb-bg: 255, 255, 255;
  --rgb-black: 0, 0, 0;
  --rgb-blue-gray: 40, 60, 90;

  /* Fonts */
  --font-base: "Noto Sans JP", sans-serif;
  --font-en: "Playfair Display", serif;

  /* Layout & Breakpoints */
  --content-width: 1000px;
  --section-spacing: 120px;

  /* Modal */
  --modal-max-height: 85dvh;

  /* Modalでのガタつき対策 */
  scrollbar-gutter: stable;
}

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

html {
  scroll-behavior: smooth; /* フォントの表示を滑らかにする */
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  padding-top: 80px;
  background-color: var(--c-bg);
  color: var(--c-text-main);
  line-height: 2;
  font-family: var(--font-base);
  letter-spacing: .03em;
  -webkit-font-smoothing: antialiased; /* 文字の輪郭をなめらかに表示する */
}

/* モーダル表示時に背後のスクロールを禁止 */
body:has(dialog[open]) {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity .3s;
}

a:hover {
  opacity: .6;
}

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

/* =========================================
   Common Components
========================================= */
.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-spacing) 0;
}

.section-title {
  margin-bottom: 3rem;
  font-weight: 450;
  font-size: 2.5rem;
  font-family: var(--font-en);
  text-align: center;
}

/* =========================================
   Header
========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 100%;
  height: 80px;
  border-bottom: 1px solid var(--c-border);
  background-color: rgba(var(--rgb-bg), .95);
  backdrop-filter: blur(5px); /* 要素が重なった際のぼかし */
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--content-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
}

.site-title {
  font-weight: 600;
  font-size: 1.25rem;
  font-family: var(--font-en);
  letter-spacing: .05em;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--c-text-light);
  font-size: .9rem;
  user-select: none;
}

.nav a:hover {
  color: var(--c-main);
}

/* =========================================
   Hero Section
========================================= */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: calc(100dvh - 80px);
  padding: 0 24px;
  text-align: center;
}

.hero-title {
  margin-bottom: 2rem;
  background: var(--c-main-gradient);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 450;
  font-size: 4rem;
  font-family: var(--font-en);
  letter-spacing: .1em;
}

.hero-text {
  max-width: 600px;
  margin: 0 auto;
  color: var(--c-text-light);
  font-size: 1rem;
}

/* =========================================
   Two Column Layout
========================================= */
.two-column {
  display: grid;
  align-items: center;
  gap: 60px;
  grid-template-columns: 1fr 1fr;
}

.two-column.reverse .column-image {
  order: 2;
}

.two-column.reverse .column-text {
  order: 1;
}

.column-image img {
  width: 100%;
  background-color: var(--c-bg-sub);
  aspect-ratio: 3 / 4; /* 縦横比：横 / 縦 */
  object-fit: cover;
}

.column-text h2 {
  margin-bottom: 1.5rem;
  font-weight: 450;
  font-size: 2rem;
  font-family: var(--font-en);
}

.column-text p {
  margin-bottom: 1.5rem;
  color: var(--c-text-light);
  font-size: .95rem;
  text-align: justify;
}

/* Skills List */
.skills-block {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--c-border);
}

.skills-block h3 {
  margin-bottom: 1rem;
  font-weight: 400;
  font-size: 1.1rem;
  font-family: var(--font-en);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
}

.skills-list li {
  padding: 6px 16px;
  border: 1px solid var(--c-text-skills);
  border-radius: 999px;
  color: var(--c-text-skills);
  font-weight: 500;
  font-size: .8rem;
}

/* =========================================
   Works Section
========================================= */
.bg-gray {
  background-color: var(--c-bg-sub);
}

.works-grid {
  display: grid;
  gap: 40px;
  grid-template-columns: repeat(3, 1fr);
}

.work-card {
  padding: 20px;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  cursor: pointer;
  transition: box-shadow .4s;
}

.work-card:hover {
  border-color: var(--c-main);
  box-shadow: 0 10px 30px rgba(var(--rgb-blue-gray), .06);
}

.work-thumb {
  width: 100%;
  margin-bottom: 1.25rem;
  overflow: hidden;
  background-color: var(--c-border);
  aspect-ratio: 4 / 3;
}

.work-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-card h3 {
  margin-bottom: .5rem;
  font-weight: 500;
  font-size: 1.1rem;
}

.work-card p {
  margin-bottom: .25rem;
  color: var(--c-text-light);
  font-size: .85rem;
  line-height: 1.6;
}

.work-card .date {
  margin-top: .5rem;
  color: var(--c-text-muted);
  font-size: .75rem;
  font-family: var(--font-en);
}

/* =========================================
   Modal Base
========================================= */
.modal {
  width: 90%;
  max-width: 900px;
  margin: auto;
  padding: 0;
  border: none;
  background: transparent;
}

/* オーバーレイ */
.modal::backdrop {
  background: rgba(var(--rgb-black), .4);
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
}

/* ダイアログが開いた時のアニメーション */
.modal[open] {
  animation: modalFadeUp .35s ease forwards;
}

/* =========================================
   Modal Content
========================================= */
.modal-content {
  position: relative;
  width: 100%;
  max-height: var(--modal-max-height);
  overflow: hidden;
  isolation: isolate; /* z-indexの影響範囲の制限 */
  border-radius: 10px;
  background: var(--c-bg-sub);
  overscroll-behavior: contain; /* 背景スクロールを防止 */
}

@keyframes modalFadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 10;
  border: none;
  background: none;
  color: var(--c-modal-close);
  font-size: 33px;
  line-height: 1;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--c-modal-close-hover);
}

.modal-body {
  display: grid;
  align-items: start;
  gap: 30px;
  grid-template-columns: 2fr 1fr;
}

.modal-image {
  height: 100%;
}

.modal-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-container {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--c-bg-video);
}

.bg-video {
  z-index: -1;
  width: calc(100% + 1px);
  height: 100%;
}

.modal-text {
  max-height: var(--modal-max-height);
  padding: 0 16px 45px 0;
  overflow-y: auto;
}

.modal-title {
  position: sticky;
  top: 0;
  margin-bottom: 11px;
  padding: 45px 0 5px;
  background: var(--c-bg-sub);
  color: var(--c-text-main);
  font-size: 1.2rem;
}

.modal-languages {
  margin-bottom: 16px;
  color: var(--c-text-light);
  font-size: .85rem;
}

.modal-description {
  padding-top: 16px;
  border-top: 1px solid var(--c-border-dark);
  color: var(--c-text-main);
  font-size: .95rem;
  line-height: 1.7;
  white-space: pre-wrap;
}

.modal-subtitle {
  margin-top: 30px;
  font-weight: 700;
  font-size: 14px;
}

.modal-paragraph {
  margin-top: 3px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.modal-links {
  display: flex;
  gap: 12px;
  margin-top: 32px;
}

.modal-links a {
  padding: 8px 14px;
  border: 1px solid var(--c-main);
  border-radius: 6px;
  background: transparent;
  color: var(--c-main);
  font-size: .75rem;
  user-select: none;
  transition: background .2s, color .2s;
}

.modal-links a:hover {
  background: var(--c-main);
  color: var(--c-text-link);
}

.demo-login-info {
  margin-top: 20px;
  padding: 8px 14px;
  border: 1px solid var(--c-border-input);
  border-radius: 4px;
  color: var(--c-text-main);
  font-size: 14px;
}

.demo-login-title {
  font-weight: 550;
  font-size: 12px;
}

.demo-login-text {
  margin-top: 3px;
  line-height: 1.5;
  white-space: pre-wrap;
}

/* =========================================
   Footer
========================================= */
.footer {
  padding: 100px 0 60px;
  border-top: 1px solid var(--c-border);
  text-align: center;
}

.footer-msg {
  margin-bottom: 1.5rem;
  color: var(--c-text-main);
  font-style: italic;
  font-size: 1rem;
  font-family: var(--font-en);
}

.footer-copy {
  color: var(--c-text-light);
  font-size: .75rem;
}

/* =========================================
   Login Section
========================================= */
.login-wrapper {
  display: flex;
  flex: 1;
  justify-content: center;
  align-items: center;
  padding: 120px 24px 60px;
  background-color: var(--c-bg-sub);
}

.login-card {
  width: 100%;
  max-width: 440px;
  padding: 60px 40px;
  border: 1px solid var(--c-border);
  box-shadow: 0 4px 20px rgba(var(--rgb-black), .02);
  background: var(--c-bg);
}

.login-title {
  margin-bottom: 40px;
  font-weight: 400;
  font-size: 2rem;
  font-family: var(--font-en);
  text-align: center;
}

.form-group {
  position: relative;
  margin-bottom: 24px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  color: var(--c-text-light);
  font-size: .85rem;
}

.form-input {
  width: 100%;
  padding: 12px 0;
  border: none;
  border-bottom: 1px solid var(--c-border-input);
  background: transparent;
  color: var(--c-text-main);
  font-size: 1rem;
  transition: border-color .3s;
}

.form-input:focus {
  border-bottom-color: var(--c-text-main);
  outline: none;
}

.form-input::placeholder {
  color: var(--c-border-input);
}

.toggle-password {
  position: absolute;
  right: 0;
  bottom: 12px;
  color: var(--c-text-light);
  font-size: 20px;
  user-select: none;
  cursor: pointer;
}

.toggle-password:hover {
  color: var(--c-text-main);
}

.btn-submit {
  width: 100%;
  margin-top: 32px;
  padding: 14px;
  border: none;
  background-color: var(--c-text-main);
  color: var(--c-bg);
  font-size: .95rem;
  font-family: var(--font-en);
  letter-spacing: .1em;
  user-select: none;
  cursor: pointer;
  transition: opacity .3s, transform .1s;
}

.btn-submit:hover {
  opacity: .8;
}

.btn-submit:active {
  transform: scale(.98);
}

/* =========================================
   Error Message
========================================= */
.error-message {
  list-style: none;
  margin-top: 24px;
  padding: 16px 20px;
  border: 1px solid var(--c-border-warning);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(var(--rgb-black), .05);
  background-color: var(--c-warning-bg);
  font-size: .85rem;
  line-height: 1.6;
}

.error-message li {
  position: relative;
  padding-left: 22px;
}

.error-message li::before {
  position: absolute;
  top: .15em;
  left: 0;
  color: var(--c-accent-orange);
  font-size: .9rem;
  content: "⚠";
}

.font-color__orange {
  color: var(--c-accent-orange);
}

.error-message + form {
  margin-top: 16px;
}

/* =========================================
   Responsive
========================================= */
@media (max-width: 768px) {
  :root {
    --section-spacing: 80px;
    --modal-max-height: 100dvh;
  }

  .pc-only {
    display: none;
  }

  .header-inner {
    padding: 0 16px;
  }

  .site-title {
    line-height: 1;
  }

  .nav {
    gap: 16px;
  }

  .nav a {
    font-size: .8rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .two-column {
    gap: 40px;
    grid-template-columns: 1fr;
  }

  .works-grid {
    gap: 60px;
    grid-template-columns: 1fr;
  }

  .modal {
    width: 100%;
    height: 100%;
    max-height: 100%;
  }

  .modal-content {
    height: 100%;
    padding: 60px 20px 40px;
    overflow-y: auto;
    border-radius: 0;
  }

  .modal-close {
    position: fixed;
    top: 8px;
    right: 12px;
  }

  .modal-body {
    grid-template-columns: 1fr;
  }

  .modal-title {
    position: static;
    top: auto;
    padding: 20px 0 0;
    font-size: 1rem;
  }

  .modal-text {
    max-height: none;
    padding: 0;
    overflow-y: visible;
  }
}