/* ===================================================
   Fromy合同会社 コーポレートサイト
   Design: White × Monochrome Gradient × Modern
   Inspired by: Google Antigravity
=================================================== */

/* ---------- CSS Variables ---------- */
:root {
  --color-bg: #ffffff;
  --color-bg-2: #f7f7f7;
  --color-bg-3: #f0f0f0;
  --color-surface: #ffffff;
  --color-surface-2: #fafafa;
  --color-border: rgba(0,0,0,0.08);
  --color-border-2: rgba(0,0,0,0.15);
  --color-text: #111111;
  --color-text-muted: #666666;
  --color-text-subtle: #aaaaaa;
  --color-black: #111111;
  --color-white: #ffffff;

  /* Monochrome gradients */
  --gradient-text: linear-gradient(135deg, #111111 0%, #555555 50%, #999999 100%);
  --gradient-text-rev: linear-gradient(135deg, #999999 0%, #555555 50%, #111111 100%);
  --gradient-hero: linear-gradient(160deg, #111111 0%, #444444 40%, #888888 100%);
  --gradient-subtle: linear-gradient(135deg, #f0f0f0 0%, #ffffff 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #f5f5f5 100%);
  --gradient-dark: linear-gradient(135deg, #111111 0%, #333333 100%);
  --gradient-orb-1: radial-gradient(ellipse at 20% 50%, rgba(0,0,0,0.04) 0%, transparent 60%);
  --gradient-orb-2: radial-gradient(ellipse at 80% 20%, rgba(0,0,0,0.03) 0%, transparent 50%);
  --gradient-section: linear-gradient(180deg, #ffffff 0%, #f5f5f5 50%, #ffffff 100%);

  --font-jp: 'Noto Sans JP', sans-serif;
  --font-en: 'Inter', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06), 0 2px 12px rgba(0,0,0,0.04);
  --shadow: 0 4px 20px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-hover: 0 20px 60px rgba(0,0,0,0.15), 0 4px 16px rgba(0,0,0,0.08);
  --container-max: 1200px;
  --container-pad: clamp(20px, 5vw, 80px);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-jp);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.pc-only { display: inline; }
.hidden { display: none !important; }

/* ---------- Gradient Text ---------- */
.gradient-text {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-light {
  background: linear-gradient(135deg, #555555 0%, #999999 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -15px) scale(1.02); }
  66% { transform: translate(-10px, 10px) scale(0.98); }
}

@keyframes particleDrift {
  0% { opacity: 0; transform: translateY(0); }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-60px); }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.9s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal.delay-1 { transition-delay: 0.12s; }
.reveal.delay-2 { transition-delay: 0.24s; }
.reveal.delay-3 { transition-delay: 0.36s; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 32px;
  font-family: var(--font-en);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: 100px;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--color-black);
  color: var(--color-white);
  border: 1.5px solid var(--color-black);
}
.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #333 0%, #111 100%);
  opacity: 0;
  transition: var(--transition);
}
.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.btn--primary:hover::before { opacity: 1; }
.btn--primary span { position: relative; z-index: 1; }

.btn--outline {
  background: transparent;
  color: var(--color-black);
  border: 1.5px solid rgba(0,0,0,0.2);
}
.btn--outline:hover {
  border-color: var(--color-black);
  background: rgba(0,0,0,0.04);
  transform: translateY(-1px);
}

.btn--full { width: 100%; border-radius: var(--radius); }

/* ---------- Section Common ---------- */
.section {
  padding: clamp(80px, 12vw, 140px) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(48px, 8vw, 80px);
}

.section-label {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  margin-bottom: 14px;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  position: relative;
  display: inline-block;
  padding-bottom: 20px;
  line-height: 1.2;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 2px;
  background: var(--gradient-dark);
  border-radius: 2px;
}

.section-desc {
  margin-top: 20px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ===================================================
   HEADER / NAVIGATION
=================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 20px rgba(0,0,0,0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.nav__logo-img {
  height: 36px;
  width: auto;
  display: block;
  /* 白背景に黒ロゴなのでそのまま表示 */
  filter: none;
  transition: opacity 0.2s ease;
}

.nav__logo-img:hover {
  opacity: 0.7;
}

.logo-text {
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

.logo-sub {
  font-size: 0.68rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__link {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-black);
  transition: var(--transition);
  border-radius: 2px;
}

.nav__link:hover { color: var(--color-black); }
.nav__link:hover::after { width: 100%; }

.nav__link--cta {
  padding: 9px 22px;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: 100px;
  font-weight: 500;
}
.nav__link--cta::after { display: none; }
.nav__link--cta:hover {
  background: #333;
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-black);
  transition: var(--transition);
  border-radius: 2px;
}

/* ===================================================
   HERO
=================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-bg);
}

/* 背景グラデーションオーブ */
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70vw;
  height: 70vw;
  max-width: 800px;
  max-height: 800px;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.04) 0%, rgba(0,0,0,0.02) 40%, transparent 70%);
  border-radius: 50%;
  animation: orbFloat 12s ease-in-out infinite;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 50vw;
  height: 50vw;
  max-width: 600px;
  max-height: 600px;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.03) 0%, transparent 65%);
  border-radius: 50%;
  animation: orbFloat 16s ease-in-out infinite reverse;
  pointer-events: none;
}

#particleCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding-top: 120px;
  padding-bottom: 100px;
  max-width: 800px;
}

.hero__eyebrow {
  font-family: var(--font-en);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero__eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--color-text-subtle);
}

.hero__title {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-black);
  margin-bottom: 32px;
}

.hero__title .line-2 {
  background: var(--gradient-hero);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 6s ease infinite;
}

.hero__desc {
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 48px;
  max-width: 520px;
}

.hero__cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: var(--container-pad);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  z-index: 2;
}

.hero__scroll span {
  font-family: var(--font-en);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--color-text-subtle);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-text-subtle), transparent);
  animation: scrollLine 2.4s ease-in-out infinite;
}

/* ===================================================
   ABOUT
=================================================== */
.about {
  background: var(--color-bg-2);
  background-image: var(--gradient-section);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.about__heading {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: var(--color-black);
  margin-bottom: 28px;
}

.about__body {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 2;
  margin-bottom: 16px;
}

.about__stats {
  display: flex;
  gap: 0;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.stat-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 16px;
  border-right: 1px solid var(--color-border);
}
.stat-item:first-child { padding-left: 0; }
.stat-item:last-child { border-right: none; }

.stat-num {
  font-family: var(--font-en);
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.about__visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.about__card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  transition: var(--transition);
  cursor: default;
  box-shadow: var(--shadow-sm);
}

.about__card:hover {
  border-color: rgba(0,0,0,0.12);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
}

.card-icon {
  width: 52px;
  height: 52px;
  background: var(--gradient-dark);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

.card-icon svg {
  width: 28px;
  height: 28px;
}

.card-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-black);
  letter-spacing: 0.02em;
}

.card-desc {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===================================================
   SERVICE
=================================================== */
.service {
  background: var(--color-bg);
  overflow: hidden;
}

.service__list {
  display: flex;
  flex-direction: column;
}

.service__item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 40px;
  padding: 48px 0;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  transition: var(--transition);
}

.service__item:first-child { border-top: 1px solid var(--color-border); }

.service__item::before {
  content: '';
  position: absolute;
  left: -var(--container-pad);
  right: -var(--container-pad);
  top: 0;
  bottom: 0;
  background: linear-gradient(90deg, rgba(0,0,0,0.02), rgba(0,0,0,0.01));
  opacity: 0;
  transition: var(--transition-slow);
  pointer-events: none;
}

.service__item:hover::before { opacity: 1; }

.service__num {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #e0e0e0 0%, #c0c0c0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  padding-top: 6px;
  transition: var(--transition);
}

.service__item:hover .service__num {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
}

.service__title {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  letter-spacing: -0.01em;
}

.service__tag {
  font-family: var(--font-en);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-text-subtle);
  border: 1px solid var(--color-border-2);
  padding: 3px 10px;
  border-radius: 100px;
  text-transform: uppercase;
  background: var(--color-bg-2);
}

.service__body {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 2;
  margin-bottom: 20px;
  max-width: 680px;
}

.service__points {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service__points li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-left: 18px;
  position: relative;
}

.service__points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, #888 0%, #ccc 100%);
}

/* ===================================================
   COMPANY
=================================================== */
.company {
  background: var(--color-bg-2);
  background-image: var(--gradient-section);
}

.company__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.company__table table {
  width: 100%;
  border-collapse: collapse;
}

.company__table th,
.company__table td {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  vertical-align: top;
  line-height: 1.8;
}

.company__table th {
  width: 140px;
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  padding-right: 20px;
  font-size: 0.82rem;
}

.company__table td {
  color: var(--color-text);
}

.map-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.map-tab {
  flex: 1;
  padding: 10px 16px;
  font-size: 0.8rem;
  font-family: var(--font-jp);
  color: var(--color-text-muted);
  background: var(--color-bg-3);
  transition: var(--transition);
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.map-tab.active {
  background: var(--color-black);
  color: var(--color-white);
  font-weight: 600;
  border-color: var(--color-black);
}

.map-tab:not(.active):hover {
  background: var(--color-bg-2);
  border-color: var(--color-border-2);
}

.map-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  filter: grayscale(100%) contrast(95%);
}

/* ===================================================
   CONTACT
=================================================== */
.contact {
  background: var(--color-bg);
  overflow: hidden;
  position: relative;
}

.contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,0,0,0.1), transparent);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.contact-card:hover {
  border-color: rgba(0,0,0,0.12);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.contact-card__icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-dark);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  margin-bottom: 16px;
}

.contact-card__icon svg {
  width: 24px;
  height: 24px;
}

.contact-card__label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.contact-card__desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(28px, 4vw, 48px);
  box-shadow: var(--shadow);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form__label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  font-weight: 500;
}

.required {
  color: #999;
  margin-left: 2px;
}

.form__input,
.form__select,
.form__textarea {
  background: var(--color-bg-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--color-text);
  font-family: var(--font-jp);
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  border-color: rgba(0,0,0,0.3);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.05);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-text-subtle);
}

.form__select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23aaa' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

.form__select option {
  background: var(--color-white);
  color: var(--color-text);
}

.form__textarea {
  resize: vertical;
  min-height: 140px;
}

/* ===================================================
   FOOTER
=================================================== */
.footer {
  background: var(--color-black);
  padding: 64px 0 32px;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer__logo-img {
  height: 40px;
  width: auto;
  display: block;
  margin-bottom: 12px;
  /* フッターは黒背景なので白く反転 */
  filter: invert(1) brightness(1);
  opacity: 0.9;
}

.footer__tagline {
  font-family: var(--font-en);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.2em;
  margin-bottom: 4px;
}

.footer__copy-small {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.25);
}

.footer__nav ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}

.footer__nav a {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  transition: var(--transition);
}

.footer__nav a:hover { color: rgba(255,255,255,0.9); }

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer__address {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
  line-height: 1.8;
}

.footer__copyright {
  font-family: var(--font-en);
  font-size: 0.72rem;
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.04em;
}

/* ===================================================
   RESPONSIVE
=================================================== */
@media (max-width: 1024px) {
  .about__grid,
  .company__grid,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .service__item {
    grid-template-columns: 56px 1fr;
    gap: 24px;
  }
}

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

  /* Nav */
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    padding: 40px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--color-border);
    z-index: 999;
    box-shadow: -8px 0 40px rgba(0,0,0,0.08);
  }

  .nav__menu.open { right: 0; }

  .nav__link {
    font-size: 1.1rem;
    color: var(--color-text);
  }

  .nav__link--cta {
    padding: 12px 28px;
    text-align: center;
  }

  .nav__toggle {
    display: flex;
    z-index: 1001;
  }

  .nav__toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(4.5px, 4.5px);
  }
  .nav__toggle.open span:nth-child(2) { opacity: 0; }
  .nav__toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(4.5px, -4.5px);
  }

  /* Hero */
  .hero__title { font-size: 2.4rem; }
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; text-align: center; }

  /* About */
  .about__visual { grid-template-columns: 1fr 1fr; }

  /* Service */
  .service__item { grid-template-columns: 1fr; gap: 12px; }
  .service__num { font-size: 1.8rem; }

  /* Contact */
  .form__row { grid-template-columns: 1fr; }
  .form { padding: 24px; }

  /* Footer */
  .footer__top { flex-direction: column; gap: 32px; }
  .footer__nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 16px;
  }
  .footer__address { font-size: 0.65rem; }
}

@media (max-width: 480px) {
  .about__visual { grid-template-columns: 1fr; }
  .about__stats { gap: 0; }
  .hero__title { font-size: 2rem; }
  .stat-item { padding: 0 12px; }
}