/* ==========================================================================
   BASE & CUSTOM PROPERTIES
   ========================================================================== */

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

:root {
  /* Colors */
  --c-bg:         #f8f9fa;
  --c-bg-alt:     #eff1f3;
  --c-bg-dark:    #1c1c1c;
  --c-white:      #ffffff;
  --c-ink:        #1a1a1a;
  --c-text:       #3c3c3c;
  --c-muted:      #767b82;
  --c-subtle:     #adb2b8;
  --c-border:     #e2e5e8;
  --c-accent:     #0052D9;
  --c-accent-bg:  #E3EEFF;

  /* Typography */
  --f-display: 'Shippori Mincho', 'YuMincho', 'Yu Mincho', '游明朝', Georgia, serif;
  --f-body:    'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'ヒラギノ角ゴ ProN W3', 'Meiryo', sans-serif;

  /* Layout */
  --container-w: 1080px;
  --narrow-w:    700px;
  --header-h:    68px;

  /* Spacing (base 8px) */
  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2rem;
  --sp-5: 3rem;
  --sp-6: 4rem;
  --sp-7: 6rem;

  --transition: 180ms ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
  -webkit-text-size-adjust: 100%;
  overflow-x: clip; /* prevent any element from causing horizontal scroll */
}

body {
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt" 1;
  overflow-wrap: break-word;
}

img {
  max-width: 100%;
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  /* max() でSafe Area（横向き時の左右ノッチ）にも対応 */
  padding-left:  max(clamp(1.25rem, 4vw, 2.5rem), env(safe-area-inset-left, 0px));
  padding-right: max(clamp(1.25rem, 4vw, 2.5rem), env(safe-area-inset-right, 0px));
}

.container--narrow {
  max-width: var(--narrow-w);
}

/* ==========================================================================
   TYPOGRAPHY BASE
   ========================================================================== */

h1, h2, h3 {
  font-family: var(--f-display);
  color: var(--c-ink);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.45;
}

p {
  hanging-punctuation: first last;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-family: var(--f-body);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--c-ink);
  color: var(--c-white);
  border-color: var(--c-ink);
}
.btn--primary:hover {
  background: #2e2e2e;
}

.btn--ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-border);
}
.btn--ghost:hover {
  border-color: var(--c-ink);
}

.btn--secondary {
  background: var(--c-accent-bg);
  color: var(--c-accent);
  font-size: 0.8rem;
  padding: 0.6rem 1.4rem;
  letter-spacing: 0.04em;
}
.btn--secondary:hover {
  background: #ccdcff;
}

.btn--white {
  background: var(--c-white);
  color: var(--c-ink);
  border-color: var(--c-white);
}
.btn--white:hover {
  background: #ececec;
}

.btn--white-ghost {
  background: transparent;
  color: var(--c-white);
  border-color: rgba(255, 255, 255, 0.45);
}
.btn--white-ghost:hover {
  border-color: var(--c-white);
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  /* height は .nav が担う。padding-top でDynamic Island / ノッチに対応 */
  padding-top: env(safe-area-inset-top, 0px);
  background: #ffffff;
  border-bottom: 1px solid var(--c-border);
  transition: border-color var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  height: var(--header-h);
  gap: var(--sp-4);
}

.nav__logo {
  text-decoration: none;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 26px;
  width: auto;
  display: block;
}

.nav__logo:hover .nav__logo-img {
  opacity: 0.75;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  list-style: none;
  margin-left: auto;
}

.nav__link {
  font-size: 0.825rem;
  color: var(--c-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.nav__link:hover,
.nav__link.is-active {
  color: var(--c-ink);
}

.nav__link--cta {
  color: var(--c-accent);
  font-weight: 500;
}
.nav__link--cta:hover {
  color: var(--c-ink);
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  padding: 0;
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-ink);
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) {
  opacity: 0;
}
.nav__hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ==========================================================================
   SECTIONS — COMMON
   ========================================================================== */

.section {
  padding: clamp(4rem, 9vw, 7.5rem) 0;
}

.section--alt {
  background: var(--c-bg-alt);
}

.section__title {
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  margin-bottom: var(--sp-5);
}

.section__title--large {
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.4;
}

/* Small-caps label style for English section titles */
.section__label {
  font-family: var(--f-body);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: var(--sp-5);
}

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

.hero {
  min-height: 100svh;
  min-height: 100vh; /* fallback */
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
  overflow: hidden;
  position: relative;
  background: url('img/hero.jpeg') center 30% / cover no-repeat;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    rgba(10, 16, 26, 0.84) 0%,
    rgba(10, 16, 26, 0.70) 55%,
    rgba(10, 16, 26, 0.48) 100%
  );
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  max-width: 700px;
  padding-top: var(--sp-6);
  padding-bottom: var(--sp-6);
}

.hero__eyebrow {
  font-size: 0.775rem;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.60);
  margin-bottom: var(--sp-3);
}

.hero__title {
  font-size: clamp(1.65rem, 3.2vw, 2.4rem);
  font-weight: 500;
  line-height: 1.38;
  letter-spacing: 0.03em;
  margin-bottom: var(--sp-4);
  color: #ffffff;
}

.hero__desc {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 2.1;
  margin-bottom: var(--sp-5);
}

.hero__actions {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

/* ==========================================================================
   PROBLEM
   ========================================================================== */

.problem__list {
  list-style: none;
  margin-bottom: var(--sp-5);
}

.problem__item {
  position: relative;
  padding: var(--sp-3) 0 var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--c-border);
  font-size: 1.05rem;
  color: var(--c-text);
}
.problem__item:first-child {
  border-top: 1px solid var(--c-border);
}
.problem__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-accent);
}

.problem__note {
  font-size: 0.95rem;
  color: var(--c-muted);
  line-height: 2.1;
}

/* ==========================================================================
   WHAT I DO
   ========================================================================== */

.what__body {
  margin-top: var(--sp-4);
}

.what__lead {
  font-size: 1rem;
  color: var(--c-muted);
  margin-bottom: var(--sp-3);
}

.what__columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.what__col {
  padding: var(--sp-4);
  background: var(--c-bg-alt);
  border-left: 2px solid var(--c-accent);
}

.what__label {
  display: block;
  font-family: var(--f-display);
  font-size: 1rem;
  color: var(--c-ink);
  margin-bottom: var(--sp-1);
}

.what__col p {
  font-size: 0.85rem;
  color: var(--c-muted);
}

.what__closing {
  font-size: 1rem;
  color: var(--c-text);
}

/* ==========================================================================
   SERVICES
   ========================================================================== */

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-2);
}

.service-card {
  position: relative;
  padding: var(--sp-5) var(--sp-4);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  min-width: 0;
}

.service-card--featured {
  border-top: 2px solid var(--c-accent);
}

.service-card__badge {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--c-accent);
  background: var(--c-accent-bg);
  padding: 0.2rem 0.65rem;
  margin-bottom: var(--sp-3);
}

.service-card__title {
  font-size: 1.25rem;
  margin-bottom: var(--sp-3);
}

.service-card__desc {
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.95;
  margin-bottom: var(--sp-3);
}

.service-card__meta {
  font-size: 0.8rem;
  color: var(--c-subtle);
  margin-bottom: var(--sp-3);
}

/* ==========================================================================
   APPROACH
   ========================================================================== */

.approach__banner {
  margin: var(--sp-5) 0 0;
  overflow: hidden;
  height: 300px;
}

.approach__banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 45%;
  display: block;
}

.approach__steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-2);
}

.approach__step {
  padding-top: var(--sp-4);
  border-top: 1px solid var(--c-border);
  min-width: 0;
}

.approach__num {
  display: block;
  font-family: var(--f-display);
  font-size: 2.25rem;
  font-weight: 400;
  color: var(--c-border);
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-3);
}

.approach__step-title {
  font-size: 1.2rem;
  margin-bottom: var(--sp-2);
}

.approach__step-desc {
  font-size: 0.875rem;
  color: var(--c-muted);
  line-height: 1.95;
}

/* ==========================================================================
   DIAGNOSIS CALLOUT
   ========================================================================== */

.callout {
  display: flex;
  gap: var(--sp-6);
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--sp-5);
  background: var(--c-bg-alt);
  border-left: 3px solid var(--c-accent);
}

.callout__body {
  flex: 1;
}

.callout__title {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  margin-bottom: var(--sp-3);
}

.callout__desc {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--c-text);
  margin-bottom: var(--sp-3);
}

.callout__note {
  font-size: 0.875rem;
  color: var(--c-muted);
  line-height: 1.9;
}

.callout__side {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--sp-3);
  width: 260px;
}

.callout__visual {
  overflow: hidden;
  height: 170px;
}

.callout__visual-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.callout__findings {
  margin-top: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  background: var(--c-white);
  border: 1px solid var(--c-border);
}

.callout__subheading {
  font-size: 0.775rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  margin-bottom: var(--sp-2);
}

.callout__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.callout__list-item {
  position: relative;
  padding-left: var(--sp-3);
  font-size: 0.9rem;
  color: var(--c-text);
  line-height: 1.7;
}

.callout__list-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-accent);
}

.callout__period {
  margin-top: var(--sp-4);
  font-size: 0.875rem;
  color: var(--c-muted);
  letter-spacing: 0.04em;
}

@media (max-width: 768px) {
  .callout {
    flex-direction: column;
    gap: var(--sp-4);
  }

  .callout__side {
    width: auto;
    align-items: flex-start;
  }

  .callout__visual {
    display: none;
  }
}

/* ==========================================================================
   EXPERIENCE
   ========================================================================== */

.experience__list {
  list-style: none;
  border-top: 1px solid var(--c-border);
  margin-top: var(--sp-2);
}

.experience__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--c-border);
}

.experience__industry {
  font-family: var(--f-display);
  font-size: 1rem;
  color: var(--c-ink);
  font-weight: 500;
  flex-shrink: 0;
}

.experience__tags {
  display: flex;
  gap: var(--sp-1);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tag {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  border: 1px solid var(--c-border);
  padding: 0.2rem 0.65rem;
}

.experience__note {
  margin-top: var(--sp-4);
  font-size: 0.775rem;
  color: var(--c-subtle);
}

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

.about__inner {
  display: flex;
  gap: var(--sp-6);
  align-items: flex-start;
  max-width: 760px;
}

.about__avatar {
  flex-shrink: 0;
  width: 140px;
  height: 140px;
  overflow: hidden;
  border: 1px solid var(--c-border);
}

.about__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.about__name {
  font-size: 1.75rem;
  margin-bottom: var(--sp-1);
}

.about__role {
  font-size: 0.825rem;
  color: var(--c-muted);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-4);
}

.about__bio {
  font-size: 0.975rem;
  line-height: 2.1;
  color: var(--c-text);
  margin-bottom: var(--sp-4);
}

.about__skills {
  list-style: none;
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.about__sns {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-top: var(--sp-4);
}

.about__sns-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.775rem;
  color: var(--c-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

.about__sns-link:hover {
  color: var(--c-ink);
}

.about__skills li {
  font-size: 0.775rem;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  border: 1px solid var(--c-border);
  padding: 0.3rem 0.8rem;
}

/* ==========================================================================
   CONTACT
   ========================================================================== */

.section--contact {
  background: var(--c-bg-dark);
  text-align: center;
}

.section__title--light {
  color: var(--c-white);
  margin-bottom: var(--sp-3);
}

.contact__desc {
  font-size: 0.975rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 2.1;
  margin-bottom: var(--sp-5);
}

.contact__actions {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  justify-content: center;
}

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

.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--c-border);
  padding: var(--sp-5) 0 calc(var(--sp-5) + env(safe-area-inset-bottom, 0px));
}

.footer__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.footer__name {
  margin-right: auto;
}

.footer__logo-img {
  height: 22px;
  width: auto;
  display: block;
  opacity: 0.75;
}

.footer__links {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.775rem;
  color: var(--c-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.footer__link:hover {
  color: var(--c-ink);
}

.footer__copy {
  width: 100%;
  font-size: 0.725rem;
  color: var(--c-subtle);
  margin-top: var(--sp-3);
}

/* ==========================================================================
   ADDITIONS — HERO SUB / SECTION INTRO / DIAGNOSIS / EXPERIENCE DESC / CONTACT NUDGE
   ========================================================================== */

/* Services導入文 */
.section__intro {
  font-size: 0.9rem;
  color: var(--c-muted);
  margin-top: calc(var(--sp-5) * -1 + var(--sp-2));
  margin-bottom: var(--sp-4);
}

/* Diagnosisおすすめブロック */
.callout__recommend {
  margin-top: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  background: var(--c-white);
  border: 1px solid var(--c-border);
}

/* Experience説明文 */
.experience__item {
  flex-wrap: wrap;
}

.experience__desc {
  flex-basis: 100%;
  font-size: 0.825rem;
  color: var(--c-muted);
  line-height: 1.7;
  margin-top: calc(var(--sp-1) * -0.5);
  padding-bottom: 0.125rem;
}

/* Contact後押し文 */
.contact__nudge {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.45);
  margin-top: calc(var(--sp-5) * -1 + var(--sp-2));
  margin-bottom: var(--sp-5);
}

/* ==========================================================================
   RESPONSIVE — TABLET (≤900px)
   ========================================================================== */

@media (max-width: 900px) {
  .services__grid {
    grid-template-columns: 1fr;
    max-width: 460px;
  }

  .approach__banner {
    height: 200px;
  }

  .approach__steps {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .approach__step {
    padding: var(--sp-3) 0;
  }
}

/* ==========================================================================
   RESPONSIVE — MOBILE (≤768px)
   ========================================================================== */

@media (max-width: 768px) {
  /* Mobile nav */
  .nav__hamburger {
    display: flex;
  }

  .nav__list {
    display: none;
    position: fixed;
    inset: calc(var(--header-h) + env(safe-area-inset-top, 0px)) 0 auto 0;
    background: #ffffff;
    border-bottom: 1px solid var(--c-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--sp-2) clamp(1.25rem, 4vw, 2.5rem);
    gap: 0;
  }

  .nav__list.is-open {
    display: flex;
  }

  .nav__list li {
    width: 100%;
    border-bottom: 1px solid var(--c-border);
  }
  .nav__list li:last-child {
    border-bottom: none;
  }

  .nav__link {
    display: block;
    padding: var(--sp-3) 0;
    font-size: 0.975rem;
  }

  /* What I Do */
  .what__columns {
    grid-template-columns: 1fr;
  }

  /* Experience */
  .experience__item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
  }

  .experience__tags {
    justify-content: flex-start;
  }

  /* About */
  .about__inner {
    flex-direction: column;
    gap: var(--sp-4);
  }

  /* Footer */
  .footer__name {
    margin-right: 0;
    width: 100%;
  }
}

/* ==========================================================================
   RESPONSIVE — SMALL MOBILE (≤480px)
   ========================================================================== */

@media (max-width: 480px) {
  /* What I Do 大見出しも同様に縮小 */
  .section__title--large {
    font-size: 1.75rem;
  }

  .hero__actions,
  .contact__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    text-align: center;
    white-space: normal;
  }

  .footer__links {
    flex-direction: column;
    gap: var(--sp-2);
  }
}