/*
Theme Name: DX Engineer
Theme URI: https://example.com/dx-engineer-theme
Author: Your Studio
Author URI: https://example.com
Description: 個人事業主のDXエンジニア・業務自動化コンサルタント向けのモダン&スタイリッシュなWordPressテーマ。ブログ、サービス紹介、実績(ポートフォリオ)、お問い合わせ機能を標準搭載。
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: LICENSE
Text Domain: dx-engineer
Tags: business, blog, portfolio, custom-menu, featured-images, translation-ready
*/

/* ==========================================================================
   0. Design Tokens
   ========================================================================== */
:root{
  /* Color */
  --c-bg:        #F7F7F5;
  --c-bg-alt:    #EFEFEA;
  --c-surface:   #FFFFFF;
  --c-ink:       #14171F;
  --c-ink-soft:  #4A4E5A;
  --c-ink-faint: #8B8F9C;
  --c-line:      #DCDEE3;
  --c-line-dark: #2A2E3A;
  --c-accent:    #2F6FED;
  --c-accent-ink:#0F3FB0;
  --c-mint:      #00B389;
  --c-red:       #E5484D;
  --c-dark:      #0F1117;
  --c-dark-surf: #171A22;

  /* Type */
  --f-display: "Space Grotesk", "Noto Sans JP", sans-serif;
  --f-body:    "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --f-mono:    "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* Scale */
  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.1rem);
  --step-1:  clamp(1.25rem, 1.15rem + 0.4vw, 1.5rem);
  --step-2:  clamp(1.6rem, 1.4rem + 0.8vw, 2.1rem);
  --step-3:  clamp(2.1rem, 1.7rem + 1.6vw, 3.2rem);
  --step-4:  clamp(2.6rem, 2rem + 2.6vw, 4.4rem);

  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 18px;
  --container: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

/* ==========================================================================
   1. Reset & Base
   ========================================================================== */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}
body{
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--f-body);
  font-size: var(--step-0);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; height: auto; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4{ font-family: var(--f-display); font-weight: 600; line-height: 1.15; margin: 0 0 0.6em; letter-spacing: -0.01em; }
p{ margin: 0 0 1.2em; color: var(--c-ink-soft); }
button{ font-family: inherit; cursor: pointer; }
:focus-visible{ outline: 2px solid var(--c-accent); outline-offset: 3px; }

.container{ max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.eyebrow{
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--f-mono); font-size: var(--step--1);
  color: var(--c-accent-ink); letter-spacing: 0.06em; text-transform: uppercase;
  margin-bottom: 1em;
}
.eyebrow::before{ content: "//"; color: var(--c-ink-faint); }

.btn{
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--f-mono); font-size: var(--step--1);
  padding: 0.9em 1.6em; border-radius: var(--radius-s);
  border: 1px solid var(--c-ink); background: var(--c-ink); color: var(--c-bg);
  transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover{ background: var(--c-accent); border-color: var(--c-accent); color: #fff; transform: translateY(-2px); }
.btn.btn-ghost{ background: transparent; color: var(--c-ink); }
.btn.btn-ghost:hover{ background: var(--c-ink); color: var(--c-bg); }
.btn.btn-accent{ background: var(--c-accent); border-color: var(--c-accent); color: #fff; }
.btn.btn-accent:hover{ background: var(--c-accent-ink); border-color: var(--c-accent-ink); }

.section{ padding-block: clamp(3.5rem, 8vw, 7rem); }
.section-head{ max-width: 640px; margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head h2{ font-size: var(--step-3); }
.section-alt{ background: var(--c-bg-alt); }
.section-dark{ background: var(--c-dark); color: #EDEEF2; }
.section-dark p{ color: #B7BAC6; }
.section-dark .eyebrow{ color: var(--c-mint); }

/* ==========================================================================
   2. Header
   ========================================================================== */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: rgba(247,247,245,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.site-header__inner{ display: flex; align-items: center; justify-content: space-between; padding-block: 1.1rem; }
.site-logo{ font-family: var(--f-mono); font-weight: 700; font-size: 1.15rem; display: flex; align-items: center; gap: 0.15em; }
.site-logo .bracket{ color: var(--c-accent); }
.primary-nav ul{ display: flex; gap: clamp(1rem, 2vw, 2.2rem); }
.primary-nav a{
  font-size: var(--step--1); color: var(--c-ink-soft); position: relative; padding-bottom: 4px;
}
.primary-nav a:hover, .primary-nav a.active{ color: var(--c-ink); }
.primary-nav a::after{
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--c-accent);
  transition: width .2s ease;
}
.primary-nav a:hover::after{ width: 100%; }
.header-actions{ display: flex; align-items: center; gap: 1rem; }
.menu-toggle{ display: none; background: none; border: none; padding: 0.4rem; }
.menu-toggle span{ display: block; width: 22px; height: 2px; background: var(--c-ink); margin: 5px 0; transition: transform .2s, opacity .2s; }

@media (max-width: 860px){
  .primary-nav{
    position: fixed; inset: 64px 0 0 0; background: var(--c-bg); border-top: 1px solid var(--c-line);
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: all .2s ease;
  }
  .primary-nav ul{ flex-direction: column; padding: 2rem var(--gutter); gap: 1.4rem; }
  .primary-nav.is-open{ transform: translateY(0); opacity: 1; pointer-events: auto; }
  .menu-toggle{ display: block; }
  .header-actions .btn{ display: none; }
}

/* ==========================================================================
   3. Hero + Terminal signature
   ========================================================================== */
.hero{ padding-block: clamp(2.5rem, 7vw, 5rem); }
.hero__grid{ display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero h1{ font-size: var(--step-4); }
.hero h1 .accent{ color: var(--c-accent); }
.hero__lead{ font-size: var(--step-1); max-width: 46ch; }
.hero__cta{ display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.6rem; }

.hero__stats{ display: flex; gap: clamp(1.4rem, 4vw, 2.6rem); margin-top: 2.6rem; flex-wrap: wrap; }
.hero__stat b{ display: block; font-family: var(--f-display); font-size: var(--step-2); }
.hero__stat span{ font-family: var(--f-mono); font-size: var(--step--1); color: var(--c-ink-faint); }

.terminal{
  background: var(--c-dark-surf); border-radius: var(--radius-l); overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(15,17,23,0.35);
  border: 1px solid #262A36;
}
.terminal__bar{ display: flex; align-items: center; gap: 0.5rem; padding: 0.8rem 1rem; background: #1E212B; }
.terminal__dot{ width: 10px; height: 10px; border-radius: 50%; }
.terminal__dot--r{ background: #FF5F57; }
.terminal__dot--y{ background: #FEBC2E; }
.terminal__dot--g{ background: #28C840; }
.terminal__title{ margin-left: auto; font-family: var(--f-mono); font-size: 0.75rem; color: #7A7F91; }
.terminal__body{ padding: 1.6rem 1.5rem 2rem; font-family: var(--f-mono); font-size: 0.86rem; line-height: 1.9; }
.terminal__line{ display: flex; gap: 0.7em; opacity: 0; animation: fadeUp .5s ease forwards; }
.terminal__line .ln{ color: #4B4F5D; user-select: none; width: 1.4em; text-align: right; flex-shrink: 0; }
.terminal__line.remove{ color: var(--c-red); }
.terminal__line.add{ color: var(--c-mint); }
.terminal__line.plain{ color: #C7C9D4; }
.terminal__line.comment{ color: #6C7180; }
.terminal__cursor{ display: inline-block; width: 7px; height: 1.1em; background: var(--c-mint); margin-left: 4px; vertical-align: -2px; animation: blink 1s step-end infinite; }
@keyframes fadeUp{ from{ opacity: 0; transform: translateY(6px);} to{ opacity: 1; transform: translateY(0);} }
@keyframes blink{ 50%{ opacity: 0; } }
@media (prefers-reduced-motion: reduce){ .terminal__line{ opacity: 1; animation: none; } }

/* ==========================================================================
   4. Tech stack strip
   ========================================================================== */
.stack-strip{ border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); padding-block: 1.6rem; overflow: hidden; }
.stack-strip__inner{ display: flex; align-items: center; gap: 2rem; }
.stack-strip__label{ font-family: var(--f-mono); font-size: var(--step--1); color: var(--c-ink-faint); flex-shrink: 0; }
.stack-strip ul{ display: flex; gap: 0.7rem; flex-wrap: wrap; }
.stack-strip li{
  font-family: var(--f-mono); font-size: var(--step--1); padding: 0.4em 0.9em; border: 1px solid var(--c-line); border-radius: 999px; color: var(--c-ink-soft);
}

/* ==========================================================================
   5. Services
   ========================================================================== */
.service-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.service-card{
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-m);
  padding: 2rem 1.8rem; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.service-card:hover{ transform: translateY(-4px); box-shadow: 0 20px 40px -24px rgba(20,23,31,0.25); border-color: var(--c-accent); }
.service-card__index{ font-family: var(--f-mono); color: var(--c-ink-faint); font-size: var(--step--1); }
.service-card h3{ font-size: var(--step-1); margin-top: 0.6rem; }
.service-card p{ font-size: 0.95rem; margin-bottom: 0.8rem; }
.service-card a{ font-family: var(--f-mono); font-size: var(--step--1); color: var(--c-accent-ink); }

@media (max-width: 900px){ .service-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px){ .service-grid{ grid-template-columns: 1fr; } }

/* ==========================================================================
   6. Process (numbered — real sequence)
   ========================================================================== */
.process-list{ display: flex; flex-direction: column; }
.process-item{
  display: grid; grid-template-columns: 90px 1fr; gap: 1.6rem; padding-block: 1.8rem;
  border-top: 1px solid #2A2E3A;
}
.process-item:last-child{ border-bottom: 1px solid #2A2E3A; }
.process-item__num{ font-family: var(--f-mono); font-size: var(--step-1); color: var(--c-mint); }
.process-item h3{ font-size: var(--step-1); margin-bottom: 0.4rem; color: #F2F3F6; }
.process-item p{ max-width: 60ch; }

@media (max-width: 640px){ .process-item{ grid-template-columns: 50px 1fr; } }

/* ==========================================================================
   7. Portfolio
   ========================================================================== */
.portfolio-grid{ display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.6rem; }
.portfolio-card{ position: relative; border-radius: var(--radius-m); overflow: hidden; background: var(--c-ink); }
.portfolio-card__media{ aspect-ratio: 4/3; overflow: hidden; }
.portfolio-card__media img{ width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.portfolio-card:hover .portfolio-card__media img{ transform: scale(1.05); }
.portfolio-card__body{ padding: 1.4rem 1.5rem 1.6rem; background: var(--c-surface); border: 1px solid var(--c-line); border-top: none; }
.portfolio-card__tags{ display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.7rem; }
.portfolio-card__tags span{ font-family: var(--f-mono); font-size: 0.72rem; padding: 0.25em 0.7em; border-radius: 999px; background: var(--c-bg-alt); color: var(--c-ink-soft); }
.portfolio-card h3{ font-size: var(--step-1); margin-bottom: 0.3rem; }
.portfolio-card .client{ font-family: var(--f-mono); font-size: var(--step--1); color: var(--c-ink-faint); }

@media (max-width: 720px){ .portfolio-grid{ grid-template-columns: 1fr; } }

/* ==========================================================================
   8. Blog
   ========================================================================== */
.post-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; }
.post-card{ display: flex; flex-direction: column; }
.post-card__media{ aspect-ratio: 16/10; border-radius: var(--radius-m); overflow: hidden; margin-bottom: 1rem; background: var(--c-bg-alt); }
.post-card__media img{ width: 100%; height: 100%; object-fit: cover; }
.post-card .date{ font-family: var(--f-mono); font-size: 0.75rem; color: var(--c-ink-faint); margin-bottom: 0.4rem; }
.post-card h3{ font-size: 1.15rem; margin-bottom: 0.4rem; }
.post-card p{ font-size: 0.92rem; }

@media (max-width: 900px){ .post-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px){ .post-grid{ grid-template-columns: 1fr; } }

.single-article{ max-width: 760px; margin-inline: auto; padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.single-article .entry-header{ margin-bottom: 2rem; }
.single-article .entry-header h1{ font-size: var(--step-3); }
.single-article .entry-thumb{ border-radius: var(--radius-l); overflow: hidden; margin-bottom: 2rem; }
.single-article .entry-content h2{ font-size: var(--step-2); margin-top: 2em; }
.single-article .entry-content h3{ font-size: var(--step-1); margin-top: 1.6em; }
.single-article .entry-content p{ font-size: 1rem; }
.single-article .entry-content blockquote{
  border-left: 3px solid var(--c-accent); margin: 1.8em 0; padding: 0.2em 1.4em; color: var(--c-ink-soft); font-style: italic;
}
.single-article .entry-content pre{ background: var(--c-dark-surf); color: #E4E6EC; padding: 1.2em; border-radius: var(--radius-m); overflow-x: auto; font-family: var(--f-mono); font-size: 0.85rem; }
.single-article .entry-content code{ font-family: var(--f-mono); background: var(--c-bg-alt); padding: 0.1em 0.4em; border-radius: 4px; }
.single-article .entry-content img{ border-radius: var(--radius-m); }

.pagination{ display: flex; gap: 0.6rem; justify-content: center; margin-top: 3rem; }
.pagination a, .pagination span{
  font-family: var(--f-mono); font-size: var(--step--1); padding: 0.6em 1em; border: 1px solid var(--c-line); border-radius: var(--radius-s);
}
.pagination .current{ background: var(--c-ink); color: var(--c-bg); border-color: var(--c-ink); }

/* ==========================================================================
   9. Contact
   ========================================================================== */
.contact-wrap{ display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2rem, 5vw, 4rem); }
.contact-info h2{ font-size: var(--step-3); color: #F2F3F6; }
.contact-info__item{ margin-top: 1.6rem; }
.contact-info__item span{ display: block; font-family: var(--f-mono); font-size: var(--step--1); color: var(--c-mint); margin-bottom: 0.3em; }
.contact-info__item a, .contact-info__item p{ color: #E4E6EC; margin: 0; }

.contact-form{ background: var(--c-dark-surf); border: 1px solid #262A36; border-radius: var(--radius-l); padding: clamp(1.6rem, 4vw, 2.4rem); }
.form-row{ margin-bottom: 1.3rem; }
.form-row label{ display: block; font-family: var(--f-mono); font-size: var(--step--1); color: #B7BAC6; margin-bottom: 0.5em; }
.form-row input, .form-row select, .form-row textarea{
  width: 100%; padding: 0.85em 1em; background: #10131A; border: 1px solid #2A2E3A; border-radius: var(--radius-s);
  color: #F2F3F6; font-family: var(--f-body); font-size: 0.95rem;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus{ border-color: var(--c-accent); }
.form-row.two-col{ display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-note{ font-family: var(--f-mono); font-size: 0.78rem; color: #7A7F91; margin-top: 1rem; }
.form-alert{ padding: 0.9em 1.1em; border-radius: var(--radius-s); font-size: 0.9rem; margin-bottom: 1.4rem; font-family: var(--f-mono); }
.form-alert.success{ background: rgba(0,179,137,0.15); color: #4FE3BC; border: 1px solid rgba(0,179,137,0.4); }
.form-alert.error{ background: rgba(229,72,77,0.15); color: #FF8A8E; border: 1px solid rgba(229,72,77,0.4); }
.honeypot-field{ position: absolute; left: -9999px; opacity: 0; }

@media (max-width: 860px){ .contact-wrap{ grid-template-columns: 1fr; } }

/* ==========================================================================
   10. Footer
   ========================================================================== */
.site-footer{ background: var(--c-dark); color: #B7BAC6; padding-block: clamp(2.5rem, 6vw, 4rem) 2rem; }
.site-footer__top{ display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; padding-bottom: 2.4rem; border-bottom: 1px solid #262A36; }
.site-footer__brand .site-logo{ color: #F2F3F6; }
.site-footer__brand p{ max-width: 34ch; margin-top: 0.8rem; color: #7A7F91; }
.footer-nav{ display: flex; gap: 2.4rem; flex-wrap: wrap; }
.footer-nav h4{ font-family: var(--f-mono); font-size: 0.78rem; color: #7A7F91; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.9rem; }
.footer-nav li{ margin-bottom: 0.6rem; font-size: 0.92rem; }
.footer-nav a:hover{ color: var(--c-mint); }
.site-footer__bottom{ display: flex; justify-content: space-between; align-items: center; padding-top: 1.6rem; font-family: var(--f-mono); font-size: 0.78rem; flex-wrap: wrap; gap: 0.6rem; }

/* ==========================================================================
   11. Page (generic content) & utility
   ========================================================================== */
.page-content{ max-width: 800px; margin-inline: auto; padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.page-content h1{ font-size: var(--step-3); margin-bottom: 1rem; }
.screen-reader-text{ position: absolute !important; clip: rect(1px,1px,1px,1px); width: 1px; height: 1px; overflow: hidden; }
.reveal{ opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

@media (max-width: 900px){
  .hero__grid{ grid-template-columns: 1fr; }
}