/* ========================================
   Colors & Variables
   ======================================== */
:root {
  --color-primary: #0073aa;
  --color-primary-hover: #045cb4;
  --color-secondary: #046bd2;
  --color-text: #334155;
  --color-text-dark: #1e293b;
  --color-text-light: #64748b;
  --color-border: #d1d5db;
  --color-bg: #ffffff;
  --color-bg-light: #f7f7f7;
  --color-bg-very-light: #f0f5fa;
  --color-gray: #f3f4f6;
  --color-red: #d63638;
  --color-red-light: #fff5f5;
  --color-green: #46b450;
  --color-green-light: #f0f9ff;
  
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 40px;
  --spacing-3xl: 48px;
  --spacing-4xl: 60px;
  --spacing-5xl: 80px;
  
  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 12px;
  --border-radius-full: 9999px;
  
  --font-scale: 1.2;
  --font-size-sm: calc(14px * var(--font-scale));
  --font-size-md: calc(16px * var(--font-scale));
  --font-size-lg: calc(18px * var(--font-scale));
  --font-size-xl: calc(20px * var(--font-scale));
  --font-size-2xl: calc(24px * var(--font-scale));
  --font-size-3xl: calc(30px * var(--font-scale));
  --font-size-4xl: calc(36px * var(--font-scale));
  --font-size-5xl: calc(48px * var(--font-scale));
  
  --shadow-sm: 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
  --shadow-md: 0px 2px 10px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.12);
  
  --transition: all 0.3s ease;
}

/* ========================================
   Global Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Oxygen-Sans', Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  font-size: var(--font-size-md);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-dark);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-lg);
}

h1 {
  font-size: var(--font-size-5xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-md);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

p:last-child {
  margin-bottom: 0;
}

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

a:hover,
a:focus {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

ul, ol {
  padding-left: 20px;
  margin-bottom: var(--spacing-lg);
}

.full-width-callout {
  width: 100%;
  padding: 0 var(--spacing-xl);
}

li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

/* ========================================
   Layout
   ======================================== */
.container {
  max-width: 90%;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 90%;
}

.container-narrow {
  max-width: 750px;
}

.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-content {
  flex-grow: 1;
}

/* ========================================
   Header & Navigation
   ======================================== */
header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.primary-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 80px;
  padding: var(--spacing-lg) 0;
}

.site-logo {
  display: flex;
  align-items: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text-dark);
  text-decoration: none;
}

.site-logo img {
  max-width: 50px;
  width: 50px;
  height: auto;
  margin-right: var(--spacing-md);
}

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

.main-navigation ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-2xl);
  margin: 0;
  padding: 0;
}

.main-navigation a {
  color: var(--color-text);
  font-size: var(--font-size-md);
  font-weight: 500;
  display: flex;
  align-items: center;
  height: 100%;
  transition: var(--transition);
}

.main-navigation a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* ========================================
   Footer
   ======================================== */
footer {
  background-color: #2c3e50;
  color: #ecf0f1;
  margin-top: auto;
}

.footer-content {
  padding: var(--spacing-5xl) 0 var(--spacing-2xl);
}

.footer-widgets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-5xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-widget h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--spacing-lg);
}

.footer-widget p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: #ecf0f1;
}

.footer-widget ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.footer-widget ul li {
  margin-bottom: var(--spacing-lg);
  line-height: 1;
}

.footer-widget a {
  color: #ecf0f1;
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: var(--transition);
}

.footer-widget a:hover {
  color: var(--color-secondary);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #34495e;
  padding-top: var(--spacing-2xl);
  text-align: center;
  font-size: var(--font-size-sm);
  color: #ecf0f1;
}

.footer-bottom a {
  color: #3498db;
  text-decoration: none;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* ========================================
   Buttons
   ======================================== */
.btn,
button,
input[type="button"],
input[type="submit"] {
  display: inline-block;
  padding: 15px 30px;
  font-size: var(--font-size-md);
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  text-align: center;
  line-height: 1em;
  family: inherit;
}

.btn-primary,
.wp-block-button__link {
  background-color: var(--color-primary);
  color: #ffffff;
  border: none;
}

.btn-primary:hover,
.wp-block-button__link:hover {
  background-color: var(--color-primary-hover);
  color: #ffffff;
  text-decoration: none;
}

.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;
  text-decoration: none;
}

.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border: 2px solid #ffffff;
}

.btn-outline-white:hover {
  background-color: #ffffff;
  color: var(--color-primary);
  text-decoration: none;
}

/* ========================================
   Sections
   ======================================== */
section {
  padding: var(--spacing-5xl) 0;
}

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

section.hero {
  background: linear-gradient(135deg, rgb(0, 115, 170) 0%, rgb(0, 160, 210) 100%);
  color: #ffffff;
  padding: var(--spacing-5xl) var(--spacing-2xl);
  text-align: center;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

section.hero h1,
section.hero h2 {
  color: #ffffff;
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-lg);
}

section.hero p {
  color: #ffffff;
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2xl);
}

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

/* ========================================
   Cards & Boxes
   ======================================== */
.card,
.feature-item,
.plan-card {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

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

.card-title {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

.card-body {
  font-size: var(--font-size-md);
  line-height: 1.8;
}

/* Plan Cards */
.plan-card {
  border: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0;
  border-radius: var(--border-radius-xl);
}

.plan-card.featured {
  border-width: 3px;
  border-color: var(--color-primary);
  background-color: #e6f3f8;
  position: relative;
}

.plan-card.featured .plan-header::before {
  content: 'おすすめ';
  display: block;
  text-align: center;
  color: var(--color-primary);
  margin-bottom: 8px;
  font-size: calc(12px * var(--font-scale));
  font-weight: 700;
}

.plan-header {
  padding: 32px 24px;
  background-color: #ffffff;
  border-radius: 10px 10px 0 0;
}

.plan-header h3 {
  text-align: center;
  color: var(--color-primary);
  font-size: calc(24px * var(--font-scale));
  font-weight: 700;
  margin: 0;
}

.plan-body {
  padding: 24px;
  background-color: #ffffff;
  border-radius: 0 0 10px 10px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.plan-features {
  margin: 16px 0;
  flex-grow: 1;
  padding-left: 0;
}

.plan-features li {
  list-style: none;
  margin-bottom: 0;
  font-size: calc(14px * var(--font-scale));
  line-height: 2;
}

.plan-cta {
  margin-top: 24px;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--border-radius-full);
  font-size: 10px;
  font-weight: 600;
  margin-left: 8px;
  vertical-align: middle;
}

.badge-ai {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  box-shadow: 0 2px 4px rgba(102, 126, 234, 0.3);
}

.badge-option {
  background: linear-gradient(135deg, #86f7ff 0%, #764ba2 100%);
  color: #fff;
  box-shadow: 0 2px 4px rgba(102, 126, 234, 0.3);
}

/* Before/After */
.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.before {
  padding: var(--spacing-2xl);
  background-color: var(--color-red-light);
  border-left: 4px solid var(--color-red);
  border-radius: var(--border-radius-lg);
}

.before h3 {
  font-size: var(--font-size-xl);
}

.after {
  padding: var(--spacing-2xl);
  background-color: var(--color-green-light);
  border-left: 4px solid var(--color-green);
  border-radius: var(--border-radius-lg);
}

.after h3 {
  font-size: var(--font-size-xl);
}

/* ========================================
   Grid Layouts
   ======================================== */
.grid {
  display: grid;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ========================================
   Forms
   ======================================== */
form {
  margin-bottom: var(--spacing-2xl);
}

input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
input[type="tel"],
input[type="date"],
textarea,
select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-md);
  font-family: inherit;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  margin-bottom: var(--spacing-md);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
input[type="tel"]:focus,
input[type="date"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--color-text-dark);
  font-size: var(--font-size-sm);
}

/* ========================================
   Utilities
   ======================================== */
.text-center {
  text-align: center;
}

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

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }
.mt-6 { margin-top: var(--spacing-2xl); }
.mt-7 { margin-top: var(--spacing-3xl); }
.mt-8 { margin-top: var(--spacing-4xl); }
.mt-9 { margin-top: var(--spacing-5xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }
.mb-6 { margin-bottom: var(--spacing-2xl); }
.mb-7 { margin-bottom: var(--spacing-3xl); }
.mb-8 { margin-bottom: var(--spacing-4xl); }
.mb-9 { margin-bottom: var(--spacing-5xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }
.p-6 { padding: var(--spacing-2xl); }

.hidden {
  display: none;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }
.gap-5 { gap: var(--spacing-xl); }
.gap-6 { gap: var(--spacing-2xl); }

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 921px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

  h1 {
    font-size: var(--font-size-3xl);
  }

  h2 {
    font-size: var(--font-size-2xl);
  }

  h3 {
    font-size: var(--font-size-xl);
  }

  section {
    padding: var(--spacing-3xl) 0;
  }

  section.hero {
    padding: var(--spacing-3xl) var(--spacing-lg);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .primary-header-bar {
    min-height: 70px;
    padding: var(--spacing-md) 0;
  }

  .main-navigation ul {
    gap: var(--spacing-lg);
  }

  .footer-widgets {
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
  }

  .before-after {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 544px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  h1 {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }

  h3 {
    font-size: var(--font-size-lg);
  }

  section {
    padding: var(--spacing-2xl) 0;
  }

  .card,
  .feature-item,
  .plan-card {
    padding: var(--spacing-lg);
  }

  .btn {
    padding: 12px 24px;
    font-size: var(--font-size-sm);
  }

  .primary-header-bar {
    min-height: 60px;
    padding: var(--spacing-sm) 0;
    flex-wrap: wrap;
  }

  .main-navigation {
    display: none;
  }

  .filter-horizontal ul {
    flex-wrap: wrap;
  }
}