@charset "UTF-8";

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
  --c-bg: #0d0d0d;
  --c-bg-light: #181818;
  --c-text: #eaeaea;
  --c-text-muted: #888888;
  --c-accent: #ffffff;
  --c-border: #333333;
  --f-en: 'Inter', sans-serif;
  --f-jp: 'Noto Sans JP', sans-serif;
  --t-transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --header-height: 80px;
}

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

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--f-jp);
  font-size: 1.6rem;
  line-height: 1.8;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-transition);
}

a:hover {
  color: var(--c-accent);
}

ul {
  list-style: none;
}

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

::selection {
  background-color: var(--c-accent);
  color: var(--c-bg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 4%;
}

.section {
  padding: 12rem 0;
}

/* Typography */
.section-title {
  font-family: var(--f-en);
  font-size: 4.8rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1.4rem;
  color: var(--c-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 6rem;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  transition: background-color var(--t-transition), backdrop-filter var(--t-transition);
}

.header.is-scrolled {
  background-color: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 4%;
}

.logo {
  font-family: var(--f-en);
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-img {
  height: 16px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 3rem;
}

.nav a {
  font-family: var(--f-en);
  font-size: 1.4rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-nav {
  display: inline-block;
  padding: 1rem 2.4rem;
  border: 1px solid var(--c-accent);
  border-radius: 40px;
  transition: all var(--t-transition) !important;
}

.btn-nav:hover {
  background-color: var(--c-accent);
  color: var(--c-bg) !important;
}

.hamburger {
  display: none;
  cursor: pointer;
  width: 30px;
  height: 20px;
  position: relative;
  z-index: 101;
}
.hamburger span {
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--c-text);
  transition: var(--t-transition);
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 0; }

.hamburger.is-active span:nth-child(1) {
  top: 50%; transform: translateY(-50%) rotate(45deg);
}
.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-active span:nth-child(3) {
  bottom: 50%; transform: translateY(50%) rotate(-45deg);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('../img/hero.png') center/cover no-repeat;
  opacity: 0.4;
  z-index: -1;
  animation: bgZoom 20s infinite alternate ease-in-out;
}

@keyframes bgZoom {
  0% { transform: scale(1); }
  100% { transform: scale(1.1); }
}

.hero-content {
  text-align: center;
  z-index: 1;
  max-width: 800px;
  padding: 0 4%;
}

.hero-subtitle {
  font-family: var(--f-en);
  font-size: 1.6rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: var(--c-text-muted);
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--f-en);
  font-size: clamp(5rem, 8vw, 10rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 3rem;
}

.hero-desc {
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--c-text-muted);
  margin-bottom: 5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.6rem 4rem;
  background-color: var(--c-text);
  color: var(--c-bg);
  font-family: var(--f-en);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 40px;
  transition: transform var(--t-transition), box-shadow var(--t-transition);
}

.btn-primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(255,255,255,0.15);
  color: var(--c-bg);
}

.scroll-down {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.scroll-down span {
  font-family: var(--f-en);
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  transform: rotate(90deg);
  margin-bottom: 10px;
}

.scroll-down .line {
  width: 1px;
  height: 60px;
  background-color: rgba(255,255,255,0.2);
  position: relative;
  overflow: hidden;
}

.scroll-down .line::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--c-accent);
  animation: scrollLine 2s infinite cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes scrollLine {
  0% { transform: translateY(-100%); }
  50% { transform: translateY(0); }
  100% { transform: translateY(100%); }
}

/* ==========================================================================
   About
   ========================================================================== */
.about {
  background-color: var(--c-bg);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8rem;
}

.about-lead {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 3rem;
  color: var(--c-accent);
}

.about-desc {
  color: var(--c-text-muted);
  margin-bottom: 4rem;
}

.info-list {
  border-top: 1px solid var(--c-border);
}

.info-list dt {
  padding: 2.5rem 0 1rem;
  font-weight: 500;
  color: var(--c-accent);
}

.info-list dd {
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-text-muted);
}

/* ==========================================================================
   Services
   ========================================================================== */
.services {
  background-color: var(--c-bg-light);
}

.services-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.service-item {
  position: relative;
  padding: 8rem 6rem;
  background-color: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 24px;
  display: grid;
  grid-template-columns: 100px 1fr 1fr;
  align-items: center;
  gap: 4rem;
  overflow: hidden;
  transition: border-color var(--t-transition);
}

.service-item:hover {
  border-color: rgba(255,255,255,0.2);
}

.service-number {
  font-family: var(--f-en);
  font-size: 4rem;
  font-weight: 300;
  color: var(--c-border);
  align-self: flex-start;
}

.service-content {
  z-index: 2;
}

.service-name {
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.service-tag {
  font-family: var(--f-en);
  font-size: 1.2rem;
  font-weight: 600;
  padding: 0.4rem 1.2rem;
  border: 1px solid var(--c-accent);
  border-radius: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.service-desc {
  color: var(--c-text-muted);
}

.media-list {
  margin-top: 2rem;
}

.media-list li {
  margin-bottom: 1rem;
}

.media-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 1rem;
  color: var(--c-text);
  border-bottom: 1px solid transparent;
}

.media-list a:hover {
  border-bottom-color: var(--c-text);
}

.media-list span {
  font-size: 1.3rem;
  color: var(--c-text-muted);
}

.service-visual {
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0.1;
  z-index: 1;
  transition: opacity var(--t-transition), transform var(--t-transition);
}

.service-item:hover .service-visual {
  opacity: 0.2;
  transform: scale(1.05);
}

.sv-1 { background-image: url('../img/sns.png'); }
.sv-2 { background-image: url('../img/web.png'); }
.sv-3 { background-image: url('../img/media.png'); }

/* ==========================================================================
   Information
   ========================================================================== */
.information {
  background-color: var(--c-bg);
}

.news-list {
  border-top: 1px solid var(--c-border);
}

.news-list li {
  display: flex;
  align-items: baseline;
  gap: 3rem;
  padding: 3rem 0;
  border-bottom: 1px solid var(--c-border);
}

.news-list time {
  font-family: var(--f-en);
  font-size: 1.4rem;
  color: var(--c-text-muted);
  letter-spacing: 0.1em;
  min-width: 100px;
}

.news-list .news-title {
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--c-text);
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact {
  text-align: center;
  background-color: var(--c-bg);
}

.contact-box {
  padding: 10rem 4rem;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--c-border);
  border-radius: 32px;
}

.contact-title {
  font-family: var(--f-en);
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 2rem;
}

.contact-desc {
  color: var(--c-text-muted);
  margin-bottom: 5rem;
}

.btn-primary.lg {
  padding: 2rem 5rem;
  font-size: 1.6rem;
  font-family: var(--f-jp);
}

.btn-primary .arrow {
  margin-left: 1rem;
  transition: transform var(--t-transition);
}

.btn-primary:hover .arrow {
  transform: translateX(5px);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: #050505;
  padding: 6rem 0 3rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6rem;
}

.footer-logo {
  font-family: var(--f-en);
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.footer-logo-img {
  height: 20px;
  width: auto;
  display: block;
  opacity: 0.8;
  filter: brightness(0) invert(1);
}

.footer-address {
  color: var(--c-text-muted);
  text-align: right;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 3rem;
  text-align: center;
}

.copyright {
  font-family: var(--f-en);
  font-size: 1.2rem;
  color: var(--c-text-muted);
}

/* ==========================================================================
   Animations
   ========================================================================== */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media screen and (max-width: 991px) {
  html { font-size: 56.25%; }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .service-item {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 6rem 4rem;
  }
  
  .service-number {
    margin-bottom: 1rem;
  }
}

@media screen and (max-width: 768px) {
  html { font-size: 50%; }
  
  .nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--c-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--t-transition);
  }
  
  .nav.is-active {
    opacity: 1;
    visibility: visible;
  }
  
  .nav ul {
    flex-direction: column;
    text-align: center;
    gap: 4rem;
  }
  
  .hamburger {
    display: block;
  }

  .footer-top {
    flex-direction: column;
    gap: 3rem;
    text-align: center;
  }
  
  .footer-address {
    text-align: center;
  }

  .service-item {
    padding: 4rem 2rem;
  }
  
  .news-list li {
    flex-direction: column;
    gap: 0.5rem;
    padding: 2.5rem 0;
  }
}