* {
  box-sizing: border-box;
}


:root {
  --background: #f4f1e9;
  --section-background: #ebe7de;

  --black: #171717;

  --accent-red: #ff6659;
  --accent-lime: #c7ff00;

  --border: rgba(0, 0, 0, 0.22);
}


html {
  scroll-behavior: smooth;
}


body {
  margin: 0;

  background: var(--background);
  color: var(--black);

  font-family:
    Arial,
    "Helvetica Neue",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    Meiryo,
    sans-serif;
}



/* ==========================================
   HEADER
========================================== */

.site-header {
  min-height: 70px;

  padding:
    0
    34px;

  display: flex;

  align-items: center;

  justify-content: space-between;

  border-bottom:
    1px
    solid
    var(--border);
}


.brand-logo {
  display: flex;

  align-items: center;

  gap: 7px;

  color: var(--black);

  text-decoration: none;

  font-size: 16px;

  font-weight: 900;

  letter-spacing: -0.03em;
}


.brand-logo:hover {
  opacity: 0.58;
}


.studio-box {
  padding:
    9px
    10px;

  background: var(--black);

  color: white;
}


.header-right {
  display: flex;

  align-items: center;

  gap: 26px;
}


.header-sub {
  color: #666;

  font-size: 10px;

  font-weight: 800;

  letter-spacing: 0.16em;
}



/* ==========================================
   LANGUAGE
========================================== */

.language-switch {
  display: flex;
}


.language-switch button {
  width: 76px;

  height: 34px;

  padding: 0;

  border:
    1px
    solid
    #aaa;

  background: transparent;

  color: var(--black);

  font-size: 11px;

  font-weight: 800;

  cursor: pointer;
}


.language-switch button + button {
  border-left: 0;
}


.language-switch button.active {
  background: var(--black);

  color: white;

  border-color: var(--black);
}



/* ==========================================
   HERO
========================================== */

.hero {
  width:
    min(
      1450px,
      100%
    );

  margin:
    0
    auto;

  padding:
    120px
    52px
    135px;
}


.hero-label {
  display: flex;

  align-items: center;

  gap: 12px;

  margin-bottom: 34px;

  font-size: 12px;

  font-weight: 900;

  letter-spacing: 0.16em;
}


.hero-accent {
  width: 34px;

  height: 14px;

  flex-shrink: 0;

  background: var(--accent-red);
}


.hero h1 {
  margin: 0;

  display: flex;

  flex-direction: column;

  align-items: flex-start;

  font-size:
    clamp(
      54px,
      6.3vw,
      94px
    );

  line-height: 1.03;

  letter-spacing: -0.065em;
}


.hero-line {
  display: block;
}


.hero-marker {
  position: relative;

  z-index: 1;

  width: fit-content;
}


.hero-marker::after {
  content: "";

  position: absolute;

  z-index: -1;

  left: -0.035em;

  right: -0.035em;

  bottom: 0.035em;

  height: 0.19em;

  background: var(--accent-lime);
}


.hero p {
  max-width: 760px;

  margin:
    48px
    0
    0;

  font-size: 14px;

  line-height: 2;
}



/* ==========================================
   SECTION
========================================== */

.tools-section {
  padding:
    90px
    40px
    120px;

  background: var(--section-background);
}


.section-heading {
  width:
    min(
      1400px,
      100%
    );

  margin:
    0
    auto
    42px;

  display: flex;

  align-items: center;

  gap: 20px;
}


.section-heading span {
  color: var(--accent-red);

  font-size: 12px;

  font-weight: 900;
}


.section-heading h2 {
  margin: 0;

  font-size: 32px;
}



/* ==========================================
   TOOL CARDS
========================================== */

.tool-grid {
  width:
    min(
      1400px,
      100%
    );

  margin: 0 auto;

  display: grid;

  grid-template-columns:
    repeat(
      3,
      minmax(0, 1fr)
    );

  align-items: stretch;

  border-top:
    1px
    solid
    var(--black);

  border-left:
    1px
    solid
    var(--black);
}


.tool-card {
  position: relative;

  min-width: 0;

  min-height: 660px;

  padding: 34px;

  display: flex;

  flex-direction: column;

  overflow: hidden;

  background: var(--background);

  color: var(--black);

  border-right:
    1px
    solid
    var(--black);

  border-bottom:
    1px
    solid
    var(--black);

  transition:
    background
    0.2s
    ease;
}


.tool-card:hover {
  background: var(--accent-lime);
}


.tool-number {
  margin-bottom: 55px;

  color: var(--accent-red);

  font-size: 12px;

  font-weight: 900;
}


.new-label {
  position: absolute;

  top: 30px;

  right: 30px;

  padding:
    7px
    9px;

  background: var(--black);

  color: white;

  font-size: 9px;

  font-weight: 900;

  letter-spacing: 0.12em;
}


.tool-type {
  margin-bottom: 13px;

  font-size: 9px;

  font-weight: 900;

  letter-spacing: 0.16em;
}


.tool-card h3 {
  margin:
    0
    0
    30px;

  font-size:
    clamp(
      24px,
      2.2vw,
      36px
    );

  line-height: 1.05;

  letter-spacing: -0.04em;
}


.tool-card > p {
  margin: 0;

  max-width: 340px;

  font-size: 12px;

  line-height: 1.9;
}



/* ==========================================
   EXAMPLES
========================================== */

.tool-examples {
  margin-top: 34px;

  min-width: 0;
}


.example-label {
  margin-bottom: 12px;

  font-size: 9px;

  font-weight: 900;

  letter-spacing: 0.14em;
}


.example-images {
  width: 100%;

  display: grid;

  grid-template-columns:
    repeat(
      2,
      minmax(0, 1fr)
    );

  gap: 10px;
}


/* 03のように画像が1枚だけの場合も
   01・02と同じサムネイル幅にする */

.example-images-single {
  grid-template-columns:
    repeat(
      2,
      minmax(0, 1fr)
    );
}


.example-images-single .example-image-button {
  grid-column: 1;
}


.example-image-button {
  position: relative;

  display: block;

  width: 100%;

  min-width: 0;

  aspect-ratio: 1 / 1;

  padding: 0;

  border:
    1px
    solid
    rgba(0, 0, 0, 0.3);

  background: transparent;

  overflow: hidden;

  cursor: zoom-in;

  appearance: none;

  -webkit-appearance: none;
}


.example-image-button img {
  position: absolute;

  inset: 0;

  display: block;

  width: 100%;

  height: 100%;

  max-width: 100%;

  object-fit: cover;

  pointer-events: none;

  transition:
    opacity
    0.2s
    ease,
    transform
    0.2s
    ease;
}


.example-image-button:hover img {
  opacity: 0.82;

  transform:
    scale(
      1.03
    );
}


.example-image-button:focus-visible {
  outline:
    3px
    solid
    var(--accent-red);

  outline-offset: 3px;
}



/* ==========================================
   TOOL LINK
========================================== */

.tool-link {
  margin-top: auto;

  padding-top: 42px;

  color: var(--black);

  text-decoration: none;

  font-size: 11px;

  font-weight: 900;

  letter-spacing: 0.12em;
}


.tool-link:hover {
  text-decoration: underline;
}



/* ==========================================
   ABOUT
========================================== */

.about-section {
  padding:
    100px
    40px;
}


.about-content {
  width:
    min(
      800px,
      100%
    );

  margin: 0 auto;
}


.about-content > p {
  margin:
    0
    0
    34px;

  font-size: 14px;

  line-height: 2;
}


.disclaimer-box {
  padding:
    24px
    26px;

  border:
    1px
    solid
    rgba(0, 0, 0, 0.22);

  background:
    rgba(255, 255, 255, 0.35);
}


.disclaimer-box h3 {
  margin:
    0
    0
    12px;

  font-size: 11px;

  font-weight: 900;

  letter-spacing: 0.15em;
}


.disclaimer-box p {
  margin: 0;

  color: #555;

  font-size: 11px;

  line-height: 1.9;
}



/* ==========================================
   IMAGE LIGHTBOX
========================================== */

.image-lightbox {
  position: fixed;

  z-index: 9999;

  inset: 0;

  padding: 40px;

  display: flex;

  align-items: center;

  justify-content: center;

  background:
    rgba(
      0,
      0,
      0,
      0.88
    );

  opacity: 0;

  visibility: hidden;

  pointer-events: none;

  transition:
    opacity
    0.2s
    ease,
    visibility
    0.2s
    ease;
}


.image-lightbox.active {
  opacity: 1;

  visibility: visible;

  pointer-events: auto;
}


.image-lightbox img {
  display: block;

  max-width:
    min(
      92vw,
      1200px
    );

  max-height: 90vh;

  width: auto;

  height: auto;

  object-fit: contain;

  box-shadow:
    0
    20px
    60px
    rgba(
      0,
      0,
      0,
      0.5
    );
}


.lightbox-close {
  position: fixed;

  z-index: 10000;

  top: 20px;

  right: 24px;

  width: 46px;

  height: 46px;

  padding: 0;

  border: 0;

  background: transparent;

  color: white;

  font-family:
    Arial,
    sans-serif;

  font-size: 38px;

  line-height: 1;

  cursor: pointer;

  appearance: none;

  -webkit-appearance: none;
}


.lightbox-close:hover {
  opacity: 0.6;
}


body.lightbox-open {
  overflow: hidden;
}



/* ==========================================
   FOOTER
========================================== */

footer {
  min-height: 90px;

  padding: 30px;

  display: grid;

  grid-template-columns:
    1fr
    auto
    1fr;

  align-items: center;

  gap: 20px;

  border-top:
    1px
    solid
    var(--border);

  font-size: 10px;

  font-weight: 700;
}


.idea-by {
  display: flex;

  align-items: center;

  gap: 6px;
}


.idea-by a {
  color: var(--black);

  text-decoration: none;

  border-bottom:
    1px
    solid
    var(--black);
}


.copyright {
  justify-self: end;
}



/* ==========================================
   TABLET
========================================== */

@media (max-width: 900px) {

  .tool-grid {
    grid-template-columns: 1fr;
  }


  .tool-card {
    min-height: 540px;
  }


  .example-images {
    max-width: 600px;
  }

}



/* ==========================================
   MOBILE
========================================== */

@media (max-width: 650px) {

  .site-header {
    min-height: 60px;

    padding:
      12px
      16px;
  }


  .brand-logo {
    font-size: 11px;
  }


  .studio-box {
    padding:
      7px
      8px;
  }


  .header-sub {
    display: none;
  }


  .header-right {
    gap: 8px;
  }


  .language-switch button {
    width: 60px;

    height: 32px;

    font-size: 9px;
  }


  .hero {
    padding:
      75px
      22px
      90px;
  }


  .hero h1 {
    font-size:
      clamp(
        40px,
        11vw,
        56px
      );
  }


  .hero-marker {
    white-space: normal;
  }


  .hero p {
    font-size: 13px;
  }


  .tools-section {
    padding:
      65px
      14px
      80px;
  }


  .section-heading {
    margin-bottom: 28px;
  }


  .section-heading h2 {
    font-size: 25px;
  }


  .tool-card {
    min-height: 520px;

    padding:
      26px
      22px;
  }


  .tool-number {
    margin-bottom: 38px;
  }


  .tool-card h3 {
    font-size: 28px;
  }


  .new-label {
    top: 22px;

    right: 22px;
  }


  .tool-examples {
    margin-top: 28px;
  }


  .example-images {
    gap: 8px;
  }


  .tool-link {
    padding-top: 36px;
  }


  .about-section {
    padding:
      70px
      20px;
  }


  .disclaimer-box {
    padding:
      20px
      18px;
  }


  .image-lightbox {
    padding:
      60px
      14px
      20px;
  }


  .image-lightbox img {
    max-width: 96vw;

    max-height: 85vh;
  }


  .lightbox-close {
    top: 12px;

    right: 12px;
  }


  footer {
    grid-template-columns: 1fr;

    gap: 10px;

    justify-items: start;
  }


  .copyright {
    justify-self: start;
  }

}