/* ============================================
   株式会社明昇開発 — Design Tokens & Base CSS
   ============================================ */

/* --- :root CSS Custom Properties --- */
:root {
  /* === Brand Colors === */
  --color-brand:        #C41A1A;
  --color-brand-dark:   #8B0000;
  --color-brand-light:  #E53935;

  /* === Neutrals === */
  --color-white:        #FFFFFF;
  --color-surface:      #F5F5F7;
  --color-divider:      #D2D2D7;
  --color-text-3:       #6E6E73;
  --color-text-2:       #424245;
  --color-text-1:       #1D1D1F;

  /* === Typography === */
  --font-ja:   'Noto Sans JP', sans-serif;
  --font-en:   'Inter', sans-serif;
  --font-tc:   'Noto Sans TC', sans-serif;
  --font-body: var(--font-ja);

  --text-display-xl: clamp(3rem, 6vw, 5rem);
  --text-display-l:  clamp(2rem, 4vw, 3.5rem);
  --text-h1:         clamp(1.75rem, 3vw, 2.5rem);
  --text-h2:         clamp(1.375rem, 2vw, 1.75rem);
  --text-h3:         1.375rem;
  --text-body-l:     1.1875rem;
  --text-body-m:     1.0625rem;
  --text-body-s:     0.875rem;
  --text-label:      0.75rem;

  /* === Spacing (8px grid) === */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* === Layout === */
  --container-max:    1200px;
  --container-wide:   980px;
  --container-narrow: 680px;
  --container-px:     24px;

  /* === Border Radius === */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-full: 980px;

  /* === Shadow === */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

  /* === Transition === */
  --transition-fast:   0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow:   0.4s ease;

  /* === Scroll Reveal === */
  --ease-reveal: cubic-bezier(0.16, 1, 0.3, 1);
  --reveal-distance: 24px;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body-m);
  line-height: 1.6;
  color: var(--color-text-2);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-brand);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-brand-dark);
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

/* --- Section --- */
.section {
  padding-block: var(--space-24);
}

.section--surface {
  background-color: var(--color-surface);
}

.section__eyebrow {
  font-size: var(--text-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-brand);
  margin-bottom: var(--space-3);
}

.section__headline {
  font-size: var(--text-h1);
  font-weight: 700;
  color: var(--color-text-1);
  max-width: var(--container-narrow);
}

.section__lead {
  font-size: var(--text-body-l);
  color: var(--color-text-2);
  max-width: var(--container-narrow);
  margin-top: var(--space-4);
  line-height: 1.6;
}

/* --- Buttons --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: var(--space-4) var(--space-8);
  background-color: var(--color-brand);
  color: var(--color-white);
  font-size: var(--text-body-m);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  text-decoration: none;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: var(--space-4) var(--space-8);
  background-color: transparent;
  color: var(--color-brand);
  font-size: var(--text-body-m);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-brand);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}

.btn-secondary:hover {
  background-color: var(--color-brand);
  color: var(--color-white);
}

/* --- Card --- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-divider);
  padding-block: var(--space-3);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nav__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 36px;
  width: auto;
}

.nav__links {
  display: none;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-body-s);
  font-weight: 600;
  color: var(--color-text-1);
  text-decoration: none;
  transition: color var(--transition-fast);
  letter-spacing: 0.02em;
}

.nav__link:hover {
  color: var(--color-brand);
}

.nav__lang {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

.nav__lang-btn {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-label);
  font-weight: 600;
  color: var(--color-text-3);
  background: none;
  border: 1.5px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-en);
}

.nav__lang-btn:hover {
  color: var(--color-text-1);
}

.nav__lang-btn.is-active {
  color: var(--color-brand);
  border-color: var(--color-brand);
}

/* Hamburger */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-1);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav__hamburger.is-open .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.is-open .nav__hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.is-open .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile overlay */
.nav__mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.97);
  z-index: 101;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.nav__mobile-overlay.is-open {
  opacity: 1;
  visibility: visible;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}

.nav__mobile-close {
  position: absolute;
  top: var(--space-4);
  right: var(--container-px);
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__mobile-close-line {
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-1);
  border-radius: 1px;
}

.nav__mobile-close-line:first-child {
  transform: rotate(45deg);
}

.nav__mobile-close-line:last-child {
  transform: rotate(-45deg);
}

.nav__mobile-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-10);
}

.nav__mobile-link {
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-text-1);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover {
  color: var(--color-brand);
}

.nav__mobile-lang {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

/* --- Footer --- */
.footer {
  background-color: var(--color-text-1);
  color: var(--color-white);
  padding-block: var(--space-16) var(--space-8);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.footer__top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-8);
}

.footer__logo-img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer__link {
  font-size: var(--text-body-s);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.footer__address {
  font-style: normal;
  font-size: var(--text-body-s);
  color: rgba(255, 255, 255, 0.5);
}

.footer__legal {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__copyright {
  font-size: var(--text-body-s);
  color: rgba(255, 255, 255, 0.4);
}

/* --- Section Grid Base --- */
.section-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-12);
}

/* --- Business Section --- */
.biz-card {
  display: flex;
  flex-direction: column;
}

.biz-card:hover {
  transform: translateY(-4px);
}

.biz-card__icon {
  color: var(--color-brand);
  margin-bottom: var(--space-5);
}

.biz-card__title {
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-text-1);
  margin-bottom: var(--space-3);
  word-break: keep-all;
  overflow-wrap: break-word;
}

.biz-card__desc {
  font-size: var(--text-body-m);
  color: var(--color-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.biz-card__services {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.biz-card__services li {
  font-size: var(--text-body-s);
  color: var(--color-text-3);
  padding-left: var(--space-4);
  position: relative;
}

.biz-card__services li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-brand);
}

.biz-card__link {
  font-size: var(--text-body-s);
  font-weight: 600;
  color: var(--color-brand);
  text-decoration: none;
  transition: color var(--transition-fast);
  align-self: flex-start;
}

.biz-card__link:hover {
  color: var(--color-brand-dark);
}

/* --- About Section --- */
.about-grid {
  gap: var(--space-12);
}

.about-message__title {
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-text-1);
  margin-bottom: var(--space-5);
}

.about-message__body {
  font-size: var(--text-body-m);
  color: var(--color-text-2);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.about-message__name {
  font-size: var(--text-body-m);
  font-weight: 600;
  color: var(--color-text-1);
}

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

.about-table th,
.about-table td {
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-body-s);
  text-align: left;
  border-bottom: 1px solid var(--color-divider);
  vertical-align: top;
}

.about-table th {
  font-weight: 600;
  color: var(--color-text-1);
  white-space: nowrap;
  width: 120px;
}

.about-table td {
  color: var(--color-text-2);
  word-break: keep-all;
  overflow-wrap: break-word;
}

.about-map {
  margin-top: var(--space-16);
}

.about-map__title {
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-text-1);
  margin-bottom: var(--space-6);
}

.about-map__wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.about-map__wrap iframe {
  display: block;
  width: 100%;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: url('/assets/images/hero-bg3.webp') center/cover no-repeat;
  background-color: var(--color-text-1);
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6));
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-8);
  max-width: 100%;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: var(--space-4);
  white-space: normal;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.hero__subtitle {
  font-size: var(--text-body-l);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-12);
}

.hero__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  justify-content: center;
}

.btn-secondary--hero {
  background: transparent;
  border: 1.5px solid var(--color-white);
  color: var(--color-white);
}

.btn-secondary--hero:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
}

/* --- News Section --- */
.news-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.news-card__date {
  font-size: var(--text-body-s);
  color: var(--color-text-3);
}

.news-card__tag {
  display: inline-block;
  align-self: flex-start;
  font-size: var(--text-label);
  font-weight: 600;
  color: var(--color-brand);
  background-color: rgba(196, 26, 26, 0.08);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.news-card__title {
  font-size: var(--text-h3);
  font-weight: 700;
  color: var(--color-text-1);
  line-height: 1.4;
}

.news-card__excerpt {
  font-size: var(--text-body-s);
  color: var(--color-text-2);
  line-height: 1.6;
}

.news-more {
  margin-top: var(--space-12);
  text-align: center;
}

.news-more__link {
  font-size: var(--text-body-m);
  font-weight: 600;
  color: var(--color-brand);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.news-more__link:hover {
  color: var(--color-brand-dark);
}

/* --- Contact Section --- */
.contact-grid {
  gap: var(--space-12);
}

.contact-info__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-info__item dt {
  font-size: var(--text-body-s);
  font-weight: 600;
  color: var(--color-text-1);
  margin-bottom: var(--space-1);
}

.contact-info__item dd {
  font-size: var(--text-body-m);
  color: var(--color-text-2);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.form-group label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-body-s);
  font-weight: 600;
  color: var(--color-text-1);
  margin-bottom: var(--space-2);
}

.form-group__required {
  font-size: var(--text-label);
  font-weight: 600;
  color: var(--color-brand);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-body-m);
  font-family: inherit;
  color: var(--color-text-1);
  background-color: var(--color-white);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-brand);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-3);
}

.form-group textarea {
  height: 160px;
  resize: vertical;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236E6E73' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
  cursor: pointer;
}

.form-privacy {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.form-privacy input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  accent-color: var(--color-brand);
  cursor: pointer;
}

.form-privacy label {
  font-size: var(--text-body-s);
  color: var(--color-text-2);
}

.contact-form__submit {
  width: 100%;
  justify-content: center;
}

.contact-form__submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-message {
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--text-body-s);
  font-weight: 600;
  margin-top: var(--space-2);
}

.form-message--success {
  background-color: rgba(46, 125, 50, 0.08);
  color: #2e7d32;
}

.form-message--error {
  background-color: rgba(198, 40, 40, 0.08);
  color: var(--color-brand-dark);
}

/* --- Privacy Policy --- */
.privacy {
  padding-block: var(--space-24) var(--space-20);
}

.privacy__title {
  font-size: var(--text-h1);
  font-weight: 900;
  color: var(--color-text-1);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-divider);
}

.privacy__intro {
  font-size: var(--text-body-l);
  color: var(--color-text-2);
  line-height: 1.8;
  margin-bottom: var(--space-12);
}

.privacy__section {
  margin-bottom: var(--space-10);
}

.privacy__section h2 {
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-text-1);
  margin-bottom: var(--space-4);
}

.privacy__section p {
  font-size: var(--text-body-m);
  color: var(--color-text-2);
  line-height: 1.8;
}

.privacy__list {
  list-style: disc;
  padding-left: var(--space-6);
  margin-top: var(--space-3);
}

.privacy__list li {
  font-size: var(--text-body-m);
  color: var(--color-text-2);
  line-height: 1.8;
  margin-bottom: var(--space-1);
}

.privacy__dl {
  margin-top: var(--space-4);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2) var(--space-6);
}

.privacy__dl dt {
  font-size: var(--text-body-m);
  font-weight: 600;
  color: var(--color-text-1);
}

.privacy__dl dd {
  font-size: var(--text-body-m);
  color: var(--color-text-2);
}

.privacy__dl a {
  color: var(--color-brand);
  text-decoration: none;
}

.privacy__dl a:hover {
  text-decoration: underline;
}

.privacy__enacted {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-body-m);
  color: var(--color-text-3);
}

/* --- Scroll Reveal --- */
.js [data-reveal] {
  opacity: 0;
}

.js [data-reveal="fade-up"] {
  transform: translateY(var(--reveal-distance));
}

.js [data-reveal="scale-in"] {
  transform: scale(0.96) translateY(16px);
}

.js [data-reveal="slide-left"] {
  transform: translateX(calc(var(--reveal-distance) * -1));
}

.js [data-reveal="slide-right"] {
  transform: translateX(var(--reveal-distance));
}

.js [data-reveal="row-reveal"] {
  transform: translateY(8px);
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

.js [data-reveal="fade-up"].is-revealed {
  transition: opacity 0.7s var(--ease-reveal),
              transform 0.7s var(--ease-reveal);
  transition-delay: calc(var(--reveal-delay, 0) * 0.12s);
}

.js [data-reveal="scale-in"].is-revealed {
  transition: opacity 1s var(--ease-reveal),
              transform 1s var(--ease-reveal);
  transition-delay: calc(var(--reveal-delay, 0) * 0.15s);
}

.js [data-reveal="slide-left"].is-revealed,
.js [data-reveal="slide-right"].is-revealed {
  transition: opacity 0.8s var(--ease-reveal),
              transform 0.8s var(--ease-reveal);
  transition-delay: calc(var(--reveal-delay, 0) * 0.12s);
}

.js [data-reveal="row-reveal"].is-revealed {
  transition: opacity 0.5s ease-out,
              transform 0.5s ease-out;
  transition-delay: calc(var(--reveal-delay, 0) * 0.08s);
}

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* --- Responsive --- */

/* Tablet (768px) */
@media (min-width: 768px) {
  :root {
    --container-px: 48px;
  }

  .section {
    padding-block: var(--space-32);
  }

  .nav__links {
    display: flex;
  }

  .nav__lang {
    display: flex;
  }

  .nav__hamburger {
    display: none;
  }

  .biz-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .news-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .about-grid {
    grid-template-columns: 3fr 2fr;
  }

  .contact-grid {
    grid-template-columns: 2fr 3fr;
  }

  .contact-form__submit {
    width: auto;
    align-self: flex-start;
  }

  .hero__title {
    white-space: pre-line;
  }

  .hero__content {
    padding-inline: var(--space-8);
  }

  .hero__cta {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .footer__top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .footer__legal {
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
  }
}

/* Desktop (1024px) */
@media (min-width: 1024px) {
  .biz-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .news-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}