/* ============================================
   M.WORKS Corporate Website - Stylesheet
   ============================================ */

/* CSS Variables - テーマ変更用 */
:root {
  /* Colors */
  --color-primary: #F87D09;
  --color-primary-dark: #d96a07;
  --color-primary-light: #ffa04d;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-background: #ffffff;
  --color-background-alt: #f8f9fa;
  --color-border: #e0e0e0;

  /* Typography */
  --font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  --font-family-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.8;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
}

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

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

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

ul, ol {
  list-style: none;
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  font-family: var(--font-family-en);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--color-primary);
  margin: var(--spacing-sm) auto 0;
}

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

.text-primary {
  color: var(--color-primary);
}

/* ============================================
   Header
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-background);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  height: 50px;
}

.logo img {
  height: 100%;
  width: auto;
}

.nav-list {
  display: flex;
  gap: var(--spacing-md);
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  padding: var(--spacing-xs) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

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

.nav-link:hover::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background-color: var(--color-text);
  transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-background-alt) 100%);
  padding-top: var(--header-height);
}

.hero-content {
  text-align: center;
  padding: var(--spacing-lg);
}

.hero-catchcopy {
  font-family: var(--font-family-en);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.05em;
  line-height: 1.3;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
}

/* Hero Buttons */
.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  align-items: center;
}

/* Button */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1rem;
  font-weight: 500;
  border-radius: 4px;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(248, 125, 9, 0.4);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

/* ============================================
   Features / Strengths Section
   ============================================ */
.features {
  background-color: var(--color-background-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

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

@media (max-width: 768px) {
  .features-grid--3col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .features-grid--3col {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background-color: var(--color-background);
  padding: var(--spacing-lg) var(--spacing-md);
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.feature-text {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* ============================================
   Services Section
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

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

@media (max-width: 768px) {
  .services-grid--2col {
    grid-template-columns: 1fr;
  }
}

.service-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

.service-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.service-header {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: var(--spacing-md);
}

.service-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.service-body {
  padding: var(--spacing-md);
}

.service-list {
  list-style: none;
}

.service-list li {
  padding: var(--spacing-xs) 0;
  padding-left: 1.5em;
  position: relative;
}

.service-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

/* ============================================
   About Section
   ============================================ */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

/* サービスページ用：アイコン左・テキスト右のレイアウト */
.service-icon {
  text-align: center;
  order: 1;
}

.service-text {
  order: 2;
}

.about-text {
  font-size: 1rem;
  line-height: 2;
}

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

.company-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--spacing-md);
}

.company-table th,
.company-table td {
  padding: var(--spacing-sm);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.company-table th {
  width: 30%;
  font-weight: 600;
  color: var(--color-text);
  background-color: var(--color-background-alt);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
  background-color: var(--color-background-alt);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--color-background);
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.form-label .required {
  color: #e74c3c;
  margin-left: 0.25em;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm);
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(248, 125, 9, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-submit {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1.1rem;
}

/* ============================================
   Intro Text
   ============================================ */
.intro-text {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: var(--color-text-light);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: #333333;
  color: #ffffff;
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-logo {
  height: 60px;
  filter: brightness(0) invert(1);
  margin-bottom: var(--spacing-sm);
}

.footer-nav-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.footer-nav-list li {
  margin-bottom: var(--spacing-xs);
}

.footer-nav-list a {
  color: #cccccc;
  font-size: 0.9rem;
}

.footer-nav-list a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid #444444;
}

.copyright {
  font-size: 0.875rem;
  color: #999999;
}

/* ============================================
   Page Header (Sub Pages)
   ============================================ */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  margin-top: var(--header-height);
  text-align: center;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.page-subtitle {
  font-family: var(--font-family-en);
  font-size: 1rem;
  opacity: 0.9;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-background);
    padding: var(--spacing-md);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-link {
    display: block;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
  }

  .hero-catchcopy {
    font-size: 1.75rem;
  }

  .hero-description {
    font-size: 0.95rem;
  }

  .hero-buttons {
    gap: var(--spacing-sm);
  }

  .hero-buttons .btn {
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-sm);
    white-space: nowrap;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  /* レスポンシブ時はテキストを上に */
  .service-icon {
    order: 2;
  }

  .service-text {
    order: 1;
  }

  .section-title {
    font-size: 2rem;
  }

  .page-title {
    font-size: 1.75rem;
  }
}

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

  .section {
    padding: var(--spacing-lg) 0;
  }

  .hero-catchcopy {
    font-size: 1.5rem;
  }

  .hero-description {
    font-size: 0.875rem;
  }

  .hero-description br {
    display: none;
  }

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

  .feature-text {
    font-size: 0.875rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .cta-title {
    font-size: 1.5rem;
  }

  .intro-text {
    font-size: 0.95rem;
  }

  .intro-text br {
    display: none;
  }
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Form error state */
.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: #e74c3c;
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

/* Header scrolled state */
.header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}