/* ==========================================================================
   Design Tokens
   ========================================================================== */

:root {
  /* Colors */
  --color-primary:      #0A0A0A;
  --color-accent:       #6B5B4E;
  --color-accent-hover: #554839;
  --color-text:         #1A1A1A;
  --color-text-light:   #6B6B6B;
  --color-bg:           #FAFAF8;
  --color-bg-alt:       #F0EEEB;
  --color-border:       #D9D6D0;
  --color-white:        #FFFFFF;

  /* Typography — Font Stacks */
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-display-ja: 'Zen Kaku Gothic Antique', 'Instrument Serif', 'Georgia', serif;
  --font-body:    'Zen Kaku Gothic Antique', 'Instrument Sans', 'system-ui', '-apple-system', sans-serif;
  --font-mono:    'DM Mono', 'Menlo', monospace;

  /* Typography — Scale */
  --text-hero:    clamp(3rem, 6vw, 5rem);
  --text-h1:      clamp(2.25rem, 4vw, 3.5rem);
  --text-h2:      clamp(1.5rem, 3vw, 2rem);
  --text-h3:      clamp(1.125rem, 2vw, 1.5rem);
  --text-body:    clamp(1rem, 1.125vw, 1.125rem);
  --text-small:   0.875rem;
  --text-caption: 0.75rem;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width:      72rem;
  --page-padding:   1.5rem;
  --page-padding-lg: 3rem;

  /* Transitions */
  --transition-default: 200ms cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Japanese proportional alternates */
:lang(ja) {
  font-feature-settings: "palt";
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-default);
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip nav */
.skip-link {
  position: absolute;
  inset-inline-start: -100%;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  z-index: 100;
}

.skip-link:focus {
  inset-inline-start: 0;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--page-padding);
}

@media (min-width: 64rem) {
  .container {
    padding-inline: var(--page-padding-lg);
  }
}

/* ==========================================================================
   Components
   ========================================================================== */

/* Section Label */
.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-light);
  margin-block-end: var(--space-xl);
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-body);
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  transition: opacity var(--transition-default);
}

.btn:hover {
  opacity: 0.85;
  text-decoration: none;
}

.btn:active {
  opacity: 0.7;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

/* Cards */
.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.card-image {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-default);
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-image-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg-alt);
}

.card-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.card-marker {
  color: #FF6F61;
  margin-inline-end: 0.3em;
}

.card-title {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

.card-body {
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 400;
  color: var(--color-text-light);
  line-height: 2;
}

.card-link {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-accent);
  margin-block-start: var(--space-sm);
  transition: opacity var(--transition-default);
}

.card-link:hover {
  opacity: 0.7;
}

/* Quotes */
.quote {
  border-bottom: 1px solid var(--color-border);
  padding-block-end: var(--space-lg);
}

.quote-mark {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-h1);
  line-height: 1;
  color: var(--color-accent);
  margin-block-end: var(--space-sm);
}

.quote-text {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-style: italic;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-text);
  margin-block-end: var(--space-md);
}

.quote-attribution {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-light);
}

/* ==========================================================================
   Scroll Animations
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(1.5rem);
}

@supports (animation-timeline: view()) {
  .reveal {
    animation: reveal-up linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }

  @keyframes reveal-up {
    from {
      opacity: 0;
      transform: translateY(1.5rem);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* IO fallback: class added by JS */
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 600ms ease, transform 600ms ease;
}

/* Stagger children */
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }

  .reveal.is-visible {
    transition: none;
  }
}

/* ==========================================================================
   Sections
   ========================================================================== */

/* --- Hero --- */
#hero {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr;
  min-height: 60svh;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--page-padding);
  padding-block: var(--page-padding);
  background-color: transparent;
}

@media (min-width: 64rem) {
  #hero {
    padding-inline: var(--page-padding-lg);
    padding-block: var(--page-padding-lg);
  }
}

@media (max-width: 47.999rem) {
  #hero {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 60svh;
    gap: var(--space-3xl);
  }
}

.hero-top-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  grid-row: 2;
  align-self: end;
}

@media (max-width: 47.999rem) {
  .hero-top-left {
    max-width: 100%;
    align-self: flex-start;
  }

  .hero-tagline {
    white-space: normal;
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }
}

.hero-bottom-right {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  align-self: flex-start;
  padding-block-start: var(--page-padding);
}

@media (min-width: 64rem) {
  .hero-bottom-right {
    padding-block-start: var(--page-padding-lg);
  }
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1s ease;
}

.hero-bg.is-active {
  opacity: 0.15;
}

.hero-logo {
  width: auto;
  height: 3rem;
  filter: invert(1);
  grid-row: 1;
  align-self: start;
  justify-self: start;
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-white);
  margin-block-end: var(--space-2xl);
}

@media (min-width: 48rem) {
  .hero-tagline {
    white-space: nowrap;
  }
}

.hero-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: flex-start;
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  justify-self: end;
  padding-block-start: var(--space-sm);
}

.hero-nav-link {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color var(--transition-default);
}

.hero-nav-link:hover {
  color: var(--color-white);
  text-decoration: none;
}

.hero-sub {
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-white);
  opacity: 0.8;
  margin-block-end: var(--space-2xl);
}

.hero-cta.btn-primary {
  background-color: var(--color-white);
  color: var(--color-primary);
}

/* --- Video Background --- */
#hero-video-wrap {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-color: var(--color-primary);
  overflow: hidden;
}

/* --- Main --- */
#main {
  position: relative;
  z-index: 1;
}

/* --- 01 採用の目利き --- */
#mekiki {
  padding-block: var(--space-3xl);
  background-color: var(--color-bg);
  border-start-start-radius: 1rem;
  border-start-end-radius: 1rem;
}

@media (min-width: 64rem) {
  #mekiki {
    padding-block: var(--space-5xl);
  }
}

/* --- Autopilot layout (01) --- */
.autopilot-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
}

.autopilot-layout--reverse .autopilot-text {
  order: -1;
}

@media (min-width: 48rem) {
  .autopilot-layout--reverse .autopilot-text {
    order: unset;
  }
}

@media (min-width: 48rem) {
  .autopilot-layout {
    grid-template-columns: 55fr 45fr;
    align-items: center;
  }

  .autopilot-layout--reverse {
    grid-template-columns: 45fr 55fr;
  }
}

.autopilot-heading {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-block-end: var(--space-lg);
}

.autopilot-body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  color: var(--color-text-light);
  line-height: 1.65;
  max-width: 55ch;
  margin-block-end: var(--space-2xl);
}

.autopilot-cta {
  margin-block-start: var(--space-md);
}

/* Autopilot visual (right column) */
.autopilot-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.autopilot-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--color-text-light);
}

/* --- 02 組織設計 --- */
#soshiki {
  padding-block: var(--space-3xl);
  background-color: var(--color-bg-alt);
}

@media (min-width: 64rem) {
  #soshiki {
    padding-block: var(--space-5xl);
  }
}

/* --- Service sections (shared) --- */
.service-title {
  font-family: var(--font-body);
  font-size: var(--text-h2);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-block-end: var(--space-lg);
}

.service-body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  color: var(--color-text-light);
  line-height: 2;
  max-width: 65ch;
}

.what-we-do-heading {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-block-end: var(--space-2xl);
}

.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 48rem) {
  .cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

/* --- Voice (03 事業×デザインの翻訳) --- */
#voice {
  padding-block: var(--space-3xl);
  background-color: var(--color-bg);
  background-image: url('assets/user-voice-bg.svg');
  background-repeat: no-repeat;
  background-position: -24px -8px;
  background-size: auto 16rem;
  overflow: hidden;
}

@media (min-width: 64rem) {
  #voice {
    padding-block: var(--space-5xl);
  }
}

.voice-layout {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

@media (min-width: 48rem) {
  .voice-layout {
    grid-template-columns: 5fr 5fr;
    gap: 0;
  }

  .voice-label {
    grid-row: 1;
    padding-block: var(--space-5xl);
    padding-inline-end: var(--space-3xl);
  }

  .voice-cards {
    grid-row: 1;
    max-height: var(--voice-label-height, auto);
    overflow-y: auto;
    padding-block: var(--space-md);
    padding-inline-end: var(--space-lg);
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
  }

  .voice-cards::-webkit-scrollbar {
    width: 4px;
  }

  .voice-cards::-webkit-scrollbar-track {
    background: transparent;
  }

  .voice-cards::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
    border-radius: 2px;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    background-clip: padding-box;
  }
}

.voice-label {
  align-self: start;
  z-index: 1;
}

.voice-label .section-label {
  margin-block-end: var(--space-lg);
}

.voice-heading {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-block-end: var(--space-lg);
}

.voice-lead {
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-text-light);
  line-height: 1.65;
}

.voice-lead strong,
.autopilot-body strong {
  font-weight: 700;
  background-image: linear-gradient(transparent 60%, #F5C1C8 60%);
  padding-inline: 0.1em;
}

.voice-cards {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}


.voice-note {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--color-text-light);
  margin-block-start: var(--space-2xl);
}

/* --- Who --- */
#who {
  position: relative;
  padding-block: var(--space-3xl);
  background-color: #D62140;
  color: var(--color-white);
  overflow: hidden;
}

#who .section-label {
  color: rgba(255, 255, 255, 0.7);
}

@media (min-width: 64rem) {
  #who {
    padding-block: var(--space-5xl);
  }
}

.who-photo {
  display: none;
}

@media (min-width: 48rem) {
  .who-photo {
    display: block;
    position: absolute;
    right: calc(5% - 200px);
    bottom: 0;
    height: 110%;
    width: auto;
    z-index: 0;
  }
}

.who-layout {
  position: relative;
  z-index: 1;
  max-width: 55%;
}

@media (max-width: 47.999rem) {
  .who-layout {
    max-width: 100%;
  }
}

.who-heading {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin-block-end: var(--space-xl);
}

.who-bio {
  max-width: 65ch;
}

.who-bio p {
  margin-block-end: var(--space-md);
}

.who-credentials {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--color-text-light);
  margin-block-start: var(--space-lg);
}

/* --- How we work --- */
#how-we-work {
  padding-block: var(--space-3xl);
  background-color: var(--color-bg-alt);
}

@media (min-width: 64rem) {
  #how-we-work {
    padding-block: var(--space-5xl);
  }
}

.how-heading {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-block-end: var(--space-2xl);
}

.how-note {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--color-text-light);
  margin-block-start: var(--space-2xl);
}

/* --- CTA area (inside footer) --- */
.cta-area {
  text-align: center;
  padding-block-end: var(--space-3xl);
  margin-block-end: var(--space-2xl);
  border-block-end: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-heading {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin-block-end: var(--space-2xl);
}

.cta-primary.btn {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

.cta-sub {
  display: block;
  margin-block-start: var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-small);
  color: var(--color-text-light);
}

.cta-sub:hover {
  color: var(--color-bg);
}

.cta-pricing {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--color-white);
  margin-block-start: var(--space-lg);
}

/* --- Footer --- */
#footer {
  position: relative;
  z-index: 2;
  padding-block: var(--space-5xl) var(--space-2xl);
  background-color: var(--color-primary);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

@media (max-width: 47.999rem) {
  .footer-inner {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  .footer-copy {
    text-align: center;
  }

  .cta-area {
    text-align: center;
  }
}

.footer-logo {
  height: 3rem;
  width: auto;
  filter: invert(1);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--color-text-light);
  text-align: center;
  margin-block-start: var(--space-2xl);
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.footer-links a {
  font-family: var(--font-body);
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
  color: var(--color-white);
}