/*
Theme Name: Link Field
Theme URI: https://link-field.com
Author: Link Field
Author URI: https://link-field.com
Description: 現場とAIをつなぐソリューション - GIS、Excel自動化、AI導入支援に特化したビジネステーマ
Version: 1.0.0
Requires at least: 6.4
Tested up to: 6.6
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: link-field
Tags: business, technology, ai, gis, responsive, mobile-first, seo-ready, custom-post-types

Link Field WordPress Theme, Copyright 2025
Link Field is distributed under the terms of the GNU GPL.
*/

/* ================================
   CSS Variables
   ================================ */
:root {
  /* Primary Colors */
  --color-primary: #00E676;
  --color-primary-dark: #00C853;
  --color-primary-light: #69F0AE;

  /* Secondary Colors */
  --color-blue: #4682B4;
  --color-brown: #8B4513;
  --color-black: #000000;
  --color-gray: #546E7A;

  /* System Colors */
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F5F5F5;
  --color-bg-dark: #1A1A1A;
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-light: #999999;
  --color-border: #E0E0E0;

  /* Typography */
  --font-primary: 'Noto Sans JP', 'ヒラギノ角ゴ Pro', 'Meiryo', sans-serif;
  --font-secondary: 'Inter', 'Arial', 'Helvetica', sans-serif;

  /* Font Sizes (Mobile First) */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */

  /* Spacing */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-2xl: 4rem;     /* 64px */
  --space-3xl: 6rem;     /* 96px */

  /* Container */
  --container-max: 1200px;
  --container-wide: 1400px;
  --container-padding: 1rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.2);
}

/* ================================
   Reset & Base Styles
   ================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
  margin-bottom: var(--space-sm);
}

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;
  display: block;
}

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

.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

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

/* ================================
   Buttons
   ================================ */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
}

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

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

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

/* ================================
   Responsive Typography (Tablet+)
   ================================ */
@media (min-width: 768px) {
  :root {
    --container-padding: 2rem;
  }

  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
  h3 { font-size: var(--font-size-2xl); }
}

/* ================================
   Responsive Typography (Desktop)
   ================================ */
@media (min-width: 1024px) {
  :root {
    --container-padding: 3rem;
  }

  h1 { font-size: var(--font-size-5xl); }
  h2 { font-size: var(--font-size-4xl); }
}

/* ================================
   Utility Classes
   ================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.d-none { display: none; }
.d-block { display: block; }

@media (min-width: 768px) {
  .d-md-none { display: none; }
  .d-md-block { display: block; }
}

@media (min-width: 1024px) {
  .d-lg-none { display: none; }
  .d-lg-block { display: block; }
}