@charset "UTF-8";

/* ========================================
   井上会計事務所 - メインスタイルシート
   ======================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

/* --- CSS Variables --- */
:root {
  --color-primary: #1B3A5C;
  --color-primary-light: #2a5580;
  --color-accent: #2E86AB;
  --color-cta: #E67E22;
  --color-cta-hover: #d35400;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7FA;
  --color-bg-dark: #1B3A5C;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-white: #FFFFFF;
  --color-border: #E0E0E0;
  --color-success: #27AE60;
  --font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --max-width: 1200px;
  --header-height: 80px;
  --header-height-scrolled: 64px;
  --transition: 0.3s ease;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.12);
  --radius: 8px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

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

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

a:hover {
  color: var(--color-primary);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  color: var(--color-primary);
  line-height: 1.4;
  font-weight: 700;
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

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

.section--dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-white);
}

.section--dark h2,
.section--dark h3 {
  color: var(--color-text-white);
}

.section__header {
  text-align: center;
  margin-bottom: 48px;
}

.section__title {
  font-size: 2rem;
  margin-bottom: 8px;
  position: relative;
  display: inline-block;
}

.section__title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--color-accent);
  margin: 12px auto 0;
}

.section__subtitle {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

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

/* --- Scroll Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  z-index: 1000;
  transition: height var(--transition), box-shadow var(--transition);
}

.header.is-scrolled {
  height: var(--header-height-scrolled);
  box-shadow: var(--shadow);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.125rem;
  white-space: nowrap;
}

.header__logo:hover {
  color: var(--color-primary);
}

.header__logo-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.header.is-scrolled .header__logo-icon {
  width: 30px;
  height: 30px;
}

/* --- Navigation --- */
.nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link {
  display: block;
  padding: 8px 16px;
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background-color var(--transition), color var(--transition);
}

.nav__link:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-alt);
}

.nav__cta {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-cta);
  color: var(--color-text-white) !important;
  font-weight: 700;
  border-radius: var(--radius);
  transition: background-color var(--transition), transform var(--transition);
}

.nav__cta:hover {
  background-color: var(--color-cta-hover);
  transform: translateY(-1px);
}

/* --- Hamburger Menu --- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.hamburger__line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.is-active .hamburger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.is-active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background-color: var(--color-bg-dark);
  background-size: cover;
  background-position: center;
  margin-top: var(--header-height);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(27, 58, 92, 0.85) 0%, rgba(27, 58, 92, 0.6) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  padding: 60px 0;
}

.hero__title {
  font-size: 2.5rem;
  color: var(--color-text-white);
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-family);
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

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

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

.btn--outline {
  background-color: transparent;
  color: var(--color-text-white);
  border: 2px solid var(--color-text-white);
}

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

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

.btn--accent:hover {
  background-color: var(--color-primary-light);
  color: var(--color-text-white);
}

/* --- Features / Strengths --- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  text-align: center;
  padding: 40px 24px;
  background-color: var(--color-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  color: var(--color-accent);
}

.feature-card__title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-card__text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Service Cards --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 32px;
  background-color: var(--color-bg);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--color-accent);
}

.service-card__title {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.service-card__text {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
}

.service-card__link:hover {
  gap: 8px;
}

/* --- Staff --- */
.staff-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  max-width: 900px;
  margin: 0 auto;
}

.staff-card {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.staff-card__photo {
  width: 160px;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius);
  flex-shrink: 0;
}

.staff-card__info {
  flex: 1;
}

.staff-card__name {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.staff-card__role {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 12px;
}

.staff-card__text {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Access / Map --- */
.access-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

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

.access-table th,
.access-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.access-table th {
  width: 30%;
  color: var(--color-primary);
  font-weight: 700;
  background-color: var(--color-bg-alt);
}

.map-container {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.map-container iframe {
  width: 100%;
  height: 400px;
  border: 0;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.9375rem;
}

.form-group .required {
  color: var(--color-cta);
  font-size: 0.75rem;
  margin-left: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: var(--font-family);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(46, 134, 171, 0.15);
}

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

.contact-info-box {
  background-color: var(--color-bg-alt);
  padding: 32px;
  border-radius: var(--radius);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-item__icon {
  width: 24px;
  height: 24px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-info-item__label {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.contact-info-item__value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
}

.contact-info-item__value a {
  color: var(--color-primary);
}

/* --- CTA Banner --- */
.cta-banner {
  text-align: center;
  padding: 60px 24px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: var(--color-text-white);
}

.cta-banner__title {
  font-size: 1.75rem;
  color: var(--color-text-white);
  margin-bottom: 12px;
}

.cta-banner__text {
  font-size: 1rem;
  margin-bottom: 24px;
  opacity: 0.9;
}

.cta-banner__phone {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-banner__phone a {
  color: var(--color-text-white);
}

.cta-banner__hours {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-bottom: 24px;
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: 16px 0;
  margin-top: var(--header-height);
  background-color: var(--color-bg-alt);
  font-size: 0.8125rem;
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item::after {
  content: '>';
  color: var(--color-text-light);
}

.breadcrumb__item:last-child::after {
  display: none;
}

.breadcrumb__link {
  color: var(--color-text-light);
}

.breadcrumb__link:hover {
  color: var(--color-accent);
}

.breadcrumb__current {
  color: var(--color-text);
  font-weight: 500;
}

/* --- Page Header (sub pages) --- */
.page-header {
  padding: 48px 0;
  background-color: var(--color-bg-dark);
  color: var(--color-text-white);
  margin-top: var(--header-height);
}

.page-header__title {
  font-size: 2rem;
  color: var(--color-text-white);
  margin-bottom: 8px;
}

.page-header__subtitle {
  font-size: 0.875rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* --- Tax Info --- */
.tax-category {
  margin-bottom: 48px;
}

.tax-category:last-child {
  margin-bottom: 0;
}

.tax-category__title {
  font-size: 1.5rem;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: 24px;
}

.tax-point {
  padding: 20px 24px;
  margin-bottom: 16px;
  background-color: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.tax-point__title {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.tax-point__text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__title {
  font-size: 1.125rem;
  color: var(--color-text-white);
  margin-bottom: 16px;
  font-weight: 700;
}

.footer__text {
  font-size: 0.875rem;
  line-height: 1.8;
  margin-bottom: 8px;
}

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

.footer__nav-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer__nav-link:hover {
  color: var(--color-text-white);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

/* --- Page Top Button --- */
.page-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-text-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), background-color var(--transition);
  z-index: 999;
  box-shadow: var(--shadow);
}

.page-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.page-top:hover {
  background-color: var(--color-accent);
}

.page-top svg {
  width: 20px;
  height: 20px;
}

/* --- Privacy / Legal --- */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h3 {
  font-size: 1.125rem;
  margin: 32px 0 12px;
}

.legal-content p {
  margin-bottom: 16px;
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

.legal-content ul {
  margin: 8px 0 16px 24px;
  list-style: disc;
}

.legal-content li {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1024px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
    --header-height-scrolled: 56px;
  }

  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-bg);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    padding: 80px 24px 24px;
    transition: right var(--transition);
    z-index: 999;
    overflow-y: auto;
  }

  .nav.is-open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    gap: 0;
  }

  .nav__link {
    padding: 14px 16px;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    width: 100%;
  }

  .nav__cta {
    margin-top: 16px;
    text-align: center;
    width: 100%;
  }

  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 998;
  }

  .nav-overlay.is-visible {
    display: block;
  }

  .hero {
    min-height: 480px;
  }

  .hero__title {
    font-size: 1.75rem;
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .section {
    padding: 60px 0;
  }

  .section__title {
    font-size: 1.625rem;
  }

  .features {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card {
    display: flex;
    text-align: left;
    gap: 20px;
    padding: 24px;
  }

  .feature-card__icon {
    margin: 0;
    width: 48px;
    height: 48px;
    flex-shrink: 0;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .staff-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .staff-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .staff-card__photo {
    width: 200px;
    height: 250px;
  }

  .access-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .page-header__title {
    font-size: 1.5rem;
  }

  .cta-banner__title {
    font-size: 1.375rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero__title {
    font-size: 1.5rem;
  }

  .hero__actions {
    flex-direction: column;
  }

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