/*
Theme Name: Mobilistica
Theme URI: https://www.mobilistica.com
Description: Mobilistica 専用テーマ — サイト表示速度・PageSpeed Insights改善ラボ。軽量・高速であること自体をブランド体験とする、装飾を最小限に絞ったエディトリアルテーマ。
Version: 1.0.0
Author: Masuto Inc.
Text Domain: mobilistica
Requires at least: 6.0
Tested up to: 6.9
Requires PHP: 8.0
License: GNU General Public License v2 or later
*/

/* ========================================
   CSS Variables — Design Tokens
   PSIの赤/オレンジ/緑スコア配色と共鳴させつつ、
   プライマリはブランド固有の信頼感あるブルーにする
======================================== */
:root {
  /* Neutrals */
  --color-ink: #0F172A;        /* 見出し・強調 */
  --color-text: #334155;       /* 本文 */
  --color-text-light: #64748B; /* 補助テキスト */
  --color-rule: #E2E8F0;       /* 罫線・ボーダー */
  --color-bg: #F8FAFC;         /* 背景 */
  --color-bg-alt: #F1F5F9;     /* カード等の背景 */
  --color-white: #FFFFFF;

  /* Brand */
  --color-primary: #2563EB;      /* ブランドカラー（信頼・テクノロジー） */
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #DBEAFE;

  /* PSIスコア配色（Google PageSpeed Insightsの慣習と揃える） */
  --color-score-good: #16A34A;   /* 90-100 相当 */
  --color-score-mid: #EA580C;    /* 50-89 相当 */
  --color-score-poor: #DC2626;   /* 0-49 相当 */

  /* Typography */
  --font-heading: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Hiragino Sans', sans-serif;
  --font-body: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Hiragino Sans', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  /* Layout */
  --max-width: 1120px;
  --max-width-narrow: 760px;
  --header-height: 64px;
  --radius: 8px;
  --radius-sm: 4px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  font-size: 1rem;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-ink);
  line-height: 1.4;
  font-weight: 700;
}

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

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

/* ========================================
   Header
======================================== */
.site-header {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex-shrink: 1;
}

.site-logomark {
  flex-shrink: 0;
  line-height: 0;
}

.site-logomark img {
  display: block;
  width: 28px;
  height: 28px;
}

.site-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-ink);
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-title a {
  color: var(--color-ink);
  text-decoration: none;
}

.site-description {
  font-size: 0.75rem;
  color: var(--color-text-light);
  white-space: nowrap;
  display: none;
}

@media (min-width: 640px) {
  .site-description {
    display: block;
  }
}

.primary-nav {
  flex-shrink: 0;
  max-width: 100%;
  overflow-x: auto;
}

.primary-nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  white-space: nowrap;
}

.primary-nav a {
  color: var(--color-text);
  white-space: nowrap;
  font-size: 0.9375rem;
  font-weight: 500;
}

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

/* ========================================
   Article / Content
======================================== */
.site-main {
  padding: 48px 0 64px;
}

.entry-header {
  margin-bottom: 32px;
  max-width: var(--max-width-narrow);
  margin-left: auto;
  margin-right: auto;
}

.entry-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.entry-title {
  font-size: 2rem;
  margin-bottom: 12px;
}

.entry-meta {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.entry-content {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  font-size: 1.0625rem;
}

.entry-content > * + * {
  margin-top: 1.5em;
}

.entry-content h2 {
  font-size: 1.5rem;
  margin-top: 2.5em;
  padding-top: 0.5em;
  border-top: 1px solid var(--color-rule);
}

.entry-content h3 {
  font-size: 1.1875rem;
  margin-top: 2em;
}

.entry-content ul,
.entry-content ol {
  padding-left: 1.5em;
}

.entry-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: 1.25em;
  color: var(--color-text-light);
  font-style: italic;
}

.entry-content code {
  font-family: var(--font-mono);
  background: var(--color-bg-alt);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

.entry-content pre {
  background: var(--color-ink);
  color: #E2E8F0;
  padding: 1.25em;
  border-radius: var(--radius);
  overflow-x: auto;
}

.entry-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.entry-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.entry-content th,
.entry-content td {
  border: 1px solid var(--color-rule);
  padding: 0.6em 0.9em;
  text-align: left;
}

.entry-content th {
  background: var(--color-bg-alt);
  font-weight: 700;
}

/* ========================================
   PSIスコアバッジ（ブランドの核となるコンポーネント）
   ショートコード: [psi_score before="32" after="89" label="モバイル"]
======================================== */
.psi-score-widget {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin: 2em 0;
}

.psi-score-item {
  text-align: center;
}

.psi-score-item .psi-score-caption {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.psi-score-circle {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-white);
  margin: 0 auto;
}

.psi-score-circle.is-poor { background: var(--color-score-poor); }
.psi-score-circle.is-mid  { background: var(--color-score-mid); }
.psi-score-circle.is-good { background: var(--color-score-good); }

.psi-score-arrow {
  font-size: 1.5rem;
  color: var(--color-text-light);
}

.psi-score-label {
  font-size: 0.75rem;
  color: var(--color-text-light);
  width: 100%;
  text-align: center;
  margin-top: 4px;
}

/* ========================================
   Cards（アーカイブ・関連記事一覧）
======================================== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.post-card {
  background: var(--color-white);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.post-card:hover {
  border-color: var(--color-primary);
}

.post-card-thumb img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
}

.post-card-body {
  padding: 18px;
}

.post-card-title {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.post-card-title a {
  color: var(--color-ink);
}

.post-card-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.post-card-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-top: 10px;
}

/* ========================================
   Hero（フロントページ）
======================================== */
.site-hero {
  padding: 72px 0 56px;
  text-align: center;
  border-bottom: 1px solid var(--color-rule);
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-bg) 100%);
}

.site-hero-title {
  font-size: 2.25rem;
  max-width: 720px;
  margin: 0 auto 16px;
}

.site-hero-tagline {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

/* ========================================
   Footer
======================================== */
.site-footer {
  border-top: 1px solid var(--color-rule);
  padding: 40px 0;
  background: var(--color-white);
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-nav a {
  font-size: 0.8125rem;
  white-space: nowrap;
  color: var(--color-text-light);
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 640px) {
  .entry-title { font-size: 1.5rem; }
  .site-hero-title { font-size: 1.625rem; }
  .site-hero { padding: 48px 0 40px; }
  .primary-nav ul { gap: 14px; }
  .psi-score-widget { padding: 20px 16px; gap: 16px; }
  .psi-score-circle { width: 68px; height: 68px; font-size: 1.375rem; }
}

/* ========================================
   Accessibility
======================================== */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-white);
  padding: 10px 16px;
  z-index: 999;
}
.skip-link:focus {
  left: 16px;
  top: 16px;
}

.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
}