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

:root {
  --bg: #0a0906;
  --text: #f2dbb2;
  --accent: #b89a6a;
  --muted: #B89A6A;
  --white: #f0ebe3;
  --offwhite: #bdbdbd;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Serif JP", serif;
  font-optical-sizing: auto;
  font-style: normal;
  font-size: 1rem;
  font-weight: 200;
  cursor: none;
  overflow-x: hidden;
}

.loader {
  position: fixed;
  width: 100%;
  height: 100%;
  background: var(--bg);
  top: 0;
  left: 0;
  z-index: 999;
}

.loader::after {
  content: "";
  display: block;
  position: absolute;
  width: 40px;
  height: 40px;
  border-top: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  border-left: 2px solid transparent;
  border-radius: 50%;
  margin: auto;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  animation: spin 1.5s infinite linear;
}


@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}


.cursor {
  position: fixed;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 99;
  transition: transform 0.15s ease;
  transform: translate(-50%, -50%);
}

.cursor-ring {
  position: fixed;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(184, 154, 106, 0.4);
  border-radius: 50%;
  pointer-events: none;
  z-index: 98;
  transition: transform 0.4s ease, width 0.3s, height 0.3s, opacity 0.3s;
  transform: translate(-50%, -50%);
}

/* Menu Button */

.menu_btn {
  position: fixed;
  top: 1rem;
  right: 1.5rem;
  color: var(--white);
  line-height: 1;
  text-decoration: none;
  z-index: 1000;
}

.menu_btn div {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.menu_btn div span {
  position: absolute;
  width: 40px;
  height: 1px;
  background: var(--offwhite);
  top: 50%;
  left: 50%;

  transition:
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.4s ease-out;

  transform-origin: center;
}

.menu_btn div span:first-child {
  transform: translate(-50%, -5px);
}

.menu_btn div span:last-child {
  transform: translate(-50%, 5px);
}

.menu_btn.active div span:first-child {
  transform: translate(-50%, 0) rotate(45deg);
}

.menu_btn.active div span:last-child {
  transform: translate(-50%, 0) rotate(-45deg);
}

.header-nav {
  position: fixed;

  top: calc(env(safe-area-inset-top) * -1);
  left: 0;
  right: 0;
  bottom: 0;

  width: 100%;
  min-height: calc(100dvh + env(safe-area-inset-top));

  padding-top: env(safe-area-inset-top);

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  z-index: 999;

  overflow: hidden;

  transform: translateX(100%);
  transition: transform .6s ease-out;

  font-family: "Inknut Antiqua", serif;
  letter-spacing: 0.1rem;
  list-style: none;
  gap: 10px;

  isolation: isolate;
}

/* 高速スクロール時に下のコンテンツがチラ見えするのを防ぐため
backdrop-filterを直接header-navにかけず疑似要素に分離 */

.header-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(10, 9, 6, 0.5);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: -1;
  transform: translateZ(0);
  will-change: transform;
}

.header-nav.active {
  transform: translateX(0);
}

/* NAV */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  display: flex;
  font-family: "Archivo", sans-serif;
  justify-content: flex-end;
  align-items: center;
  mix-blend-mode: normal;
  min-height: 100px;
  padding: 2rem 4rem;
  color: var(--white);
}

.nav-links {
  display: flex;
  gap: 3rem;
  list-style: none;
}

.nav-links a {
  color: var(--white);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: capitalize;
  transition: color 0.4s;
}

.nav-links a:hover {
  color: var(--muted);
}

.text- {
  padding: 10rem 4rem 0 4rem;
}

/* philosophy */

.text-end {
  position: relative;
  overflow: hidden;
}

.epl-sm {
  padding: 0;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
  mix-blend-mode: screen;
  filter: blur(0.8px);
  pointer-events: none;
  z-index: 0;

  animation:
    smokeBlink 10s ease-in-out infinite;

  will-change: transform, opacity;
}

@keyframes smokeBlink {

  0% {
    opacity: 0.9;
  }


  50% {
    opacity: 0.3;
  }

  100% {
    opacity: 0.9;
  }
}



.philosophy {
  padding: 8rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.philosophy-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.2rem;
  font-weight: 200;
  color: var(--white);
  letter-spacing: 0.08rem;
  line-height: 1.2;

}

.philosophy-ref {
  padding: 5rem 1rem;
  position: relative;
  overflow: hidden;
}

.philosophy-sm {
  position: absolute;
  top: 50%;
  left: 50%;

  width: min(600px, 90vw);
  height: auto;

  transform: translate(-50%, -50%);
  opacity: 0.35;

  pointer-events: none;
  z-index: 0;
}


.philosophy-ref .line {
  opacity: 0;
  filter: blur(10px);
  transform: translateY(20px);
  transition: opacity 2.5s ease, filter 3s ease, transform 2.5s ease;
}

.philosophy-ref.is-active .line {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
}


.ENL {
  padding-bottom: 2rem;
}

.philosophy-ref h1 {
  font-family: "BIZ UDPMincho", serif;
  font-size: 1rem;
  line-height: 2rem;
  text-shadow:
    1px 1px 8px rgba(246, 233, 145, 0.55);
  letter-spacing: 0.18rem;
}

.philosophy-ref h2 {
  font-size: 0.9rem;
  line-height: 2.5;
  color: var(--white);
  text-shadow:
    1px 1px 10px rgba(233, 232, 232, 0.9);
  letter-spacing: 0.13rem;
}

.JP-line {
  margin: 1rem 0;
}

.EN-Author {
  font-family: "BIZ UDPMincho", serif;
  font-size: 0.6em;
  text-shadow:
    1px 1px 8px rgba(246, 233, 145, 0.55);
  letter-spacing: 0.12rem;
  margin: 0.5rem 0;
}

.JP-Author {
  font-size: 0.6em;
  color: var(--white);
  text-shadow:
    1px 1px 8px rgba(233, 232, 232, 0.9);
  letter-spacing: 0.1rem;
  margin: 1.5rem 0;
}

.philosophy-ref h3 {
  margin: 4rem 2rem;
}

.JP-philosophy {
  font-size: 0.9rem;
  letter-spacing: 0.09rem;
  padding: 8rem 4rem;
  text-shadow:
    0 0 1px rgba(255, 255, 255, 0.9);
}

.JP-philosophy p {
  color: rgba(214, 213, 213, 0.9);
  text-shadow:
    0 0 1px rgba(143, 141, 141, 0.9);
  margin-bottom: 4.5rem;
  line-height: 3;
}

.EN-philosophy {

  display: block;
  justify-content: flex-end;
  letter-spacing: 0.15rem;
  padding: 10rem 4rem;
  font-size: 0.9rem;
}

.EN-ref {
  width: 60vw;
  margin-left: auto;
  text-shadow:
    0 0 0.8px rgba(207, 174, 120, 0.9),
    0 0 3px rgba(184, 154, 106, 0.55);
}

.EN-ref p {
  color: var(--text);
  margin-bottom: 4rem;
  line-height: 2.5;
}

.fade-paragraph {
  opacity: 0;
  transform: translateY(20px);
  transition: all 1.8s ease-out;
}

.fade-paragraph.visible {
  opacity: 1;
  transform: translateY(0);
}

/* FOOTER */
footer {
  padding: 4rem 0 1rem 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.footer_logo {
  width: 180px;
  margin: 2rem;
}

footer p {
  font-size: 0.6rem;
  color: var(--offwhite);
  letter-spacing: 0.2em;
}

/* REVEAL ANIM */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 3s ease, transform 3s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  .menu_btn {
    display: none;
  }
}


@media (max-width: 768px) {
  .cursor {
    display: none;
  }

  .cursor-ring {
    display: none;
  }


  nav {
    display: none;
  }

  .text- {
    padding: 0;
  }

  .nav-links {
    display: none;
  }

  .philosophy {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .philosophy-title {
    text-align: center;
  }

  .JP-philosophy {
    font-size: 14px;
    padding: 6rem 2rem;
  }

  .JP-philosophy p {
    line-height: 2.5;
  }

  .philosophy-ref {
    margin: 0 auto;
  }

  .EN-philosophy {
    padding: 8rem 2rem 6rem 2rem;
    justify-content: center;
    font-size: 14px;
  }

  .EN-ref {
    width: 100%;
  }

  footer {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }

  footer p {
    font-size: 8px;
  }

}

@media (max-width: 580px) {

  .philosophy-content {
    margin: 2rem;
  }

}