/*
Theme Name: Vaikobi Blog
Theme URI: https://vaikobi-japan.com/
Author: Vaikobi Japan
Description: Vaikobi Japan ブログ用テーマ。Vaikobi公式ブランドカラー(ブラック/グレー/シアン/オレンジ)とTitillium系タイポグラフィで、Salomon.jpを参考にしたグラフィックなスポーツブランド調UI。
Version: 3.2
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: vaikobi-blog
*/

:root {
  --vk-ink: #090000;
  --vk-grey: #4b4846;
  --vk-cyan: #00b1f0;
  --vk-orange: #f7941d;
  --vk-light: #eaf7fc;
  --vk-border: #e2e2e2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  color: var(--vk-ink);
  background: #fff;
  line-height: 1.8;
}

a { color: var(--vk-cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.vk-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Utility bar */
.vk-utility {
  background: var(--vk-ink);
  color: rgba(255, 255, 255, 0.75);
  font-size: 11px;
  letter-spacing: 0.04em;
}
.vk-utility .vk-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 32px;
}
.vk-utility a { color: rgba(255, 255, 255, 0.75); }
.vk-utility a:hover { color: var(--vk-cyan); text-decoration: none; }
.vk-utility-links { display: flex; gap: 18px; }

/* Header */
.vk-header {
  border-bottom: 2px solid var(--vk-ink);
  padding: 16px 0;
}
.vk-header .vk-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.vk-logo {
  font-family: "Titillium Web", Arial, sans-serif;
  font-size: 26px;
  font-weight: 700;
  font-style: italic;
  color: var(--vk-ink);
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.vk-logo a { color: var(--vk-ink); }
.vk-logo-tag {
  display: block;
  font-family: Arial, sans-serif;
  font-style: normal;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--vk-grey);
  margin-top: 1px;
}
.vk-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}
.vk-nav a {
  color: var(--vk-ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.vk-nav a:hover { color: var(--vk-cyan); text-decoration: none; }

/* Hero (front page only) */
.vk-hero {
  position: relative;
  margin: 0 calc(50% - 50vw);
  width: 100vw;
  min-height: 540px;
  display: flex;
  align-items: flex-end;
  background-size: cover;
  background-position: center;
  background-color: var(--vk-ink);
  overflow: hidden;
}
.vk-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(9, 0, 0, 0.85) 0%, rgba(9, 0, 0, 0.2) 55%, rgba(9, 0, 0, 0.05) 100%);
}
.vk-hero-inner {
  position: relative;
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 60px;
  color: #fff;
}
.vk-hero-eyebrow {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--vk-ink);
  background: var(--vk-cyan);
  padding: 6px 14px;
  margin-bottom: 20px;
}
.vk-hero-title {
  font-family: "Titillium Web", Arial, sans-serif;
  font-style: italic;
  font-size: 48px;
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  max-width: 700px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}
.vk-hero-sub {
  font-size: 15px;
  max-width: 520px;
  margin: 0 0 26px;
  color: rgba(255, 255, 255, 0.88);
}
.vk-hero-cta {
  display: inline-block;
  padding: 13px 32px;
  background: #fff;
  color: var(--vk-ink) !important;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none !important;
}
.vk-hero-cta:hover { background: var(--vk-cyan); color: #fff !important; }

/* Blog index / archive */
.vk-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 56px 0 4px;
  border-bottom: 3px solid var(--vk-ink);
  padding-bottom: 14px;
}
.vk-page-title {
  font-family: "Titillium Web", Arial, sans-serif;
  font-style: italic;
  color: var(--vk-ink);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
  text-transform: uppercase;
}
.vk-section-more {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--vk-ink) !important;
}
.vk-page-lead {
  color: var(--vk-grey);
  margin: 16px 0 8px;
}

.vk-post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 44px 28px;
  margin: 36px 0 64px;
}
.vk-card { background: transparent; }
.vk-card-img {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--vk-light);
}
.vk-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.vk-card:hover .vk-card-img img { transform: scale(1.06); }
.vk-card-cat {
  position: absolute;
  top: 0;
  left: 0;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: #fff;
  background: var(--vk-ink);
  padding: 6px 12px;
  font-weight: 800;
  text-transform: uppercase;
}
.vk-card-body { padding: 16px 0 0; border-top: 1px solid var(--vk-ink); }
.vk-card-date {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--vk-grey);
  margin: 10px 0 8px;
  text-transform: uppercase;
}
.vk-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--vk-ink);
  margin: 0;
  line-height: 1.5;
}
.vk-card:hover .vk-card-title { color: var(--vk-cyan); }

/* Single post */
.vk-article-header { margin: 40px 0 24px; }
.vk-article-cat {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  background: var(--vk-ink);
  padding: 6px 14px;
  font-weight: 800;
  margin-bottom: 14px;
}
.vk-article-title {
  font-family: "Titillium Web", Arial, sans-serif;
  font-style: italic;
  font-size: 32px;
  color: var(--vk-ink);
  line-height: 1.35;
  margin: 0 0 12px;
  font-weight: 700;
}
.vk-article-meta {
  font-size: 13px;
  color: var(--vk-grey);
}
.vk-article-eyecatch {
  margin: 24px 0;
  overflow: hidden;
}
.vk-article-body { font-size: 16px; }
.vk-article-body h2 {
  color: var(--vk-ink);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.02em;
  margin: 44px 0 16px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--vk-ink);
}
.vk-article-body h3 {
  color: var(--vk-ink);
  font-size: 18px;
  margin: 32px 0 12px;
}
.vk-article-body p { margin: 0 0 20px; }
.vk-article-body img { margin: 20px 0; }
.vk-article-tags {
  margin: 40px 0;
  padding-top: 20px;
  border-top: 1px solid var(--vk-border);
  font-size: 13px;
  color: var(--vk-grey);
}
.vk-article-tags a {
  color: var(--vk-cyan);
  margin-right: 10px;
}
.vk-cta {
  display: inline-block;
  margin-top: 24px;
  padding: 13px 30px;
  background: var(--vk-ink);
  color: #fff !important;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none !important;
}
.vk-cta:hover { background: var(--vk-cyan); }

/* Footer */
.vk-footer {
  margin-top: 80px;
  border-top: 2px solid var(--vk-ink);
  padding: 32px 0;
  font-size: 13px;
  color: var(--vk-grey);
  text-align: center;
}

/* ============================================================
   Responsive — tablet (≤768px)
   ============================================================ */
@media (max-width: 768px) {
  .vk-container { padding: 0 16px; }

  .vk-utility-links { gap: 12px; }

  .vk-header { padding: 12px 0; }
  .vk-nav ul { gap: 14px; flex-wrap: wrap; row-gap: 8px; }
  .vk-logo { font-size: 22px; }

  .vk-hero { min-height: 420px; }
  .vk-hero-inner { padding: 0 16px 40px; }
  .vk-hero-title { font-size: 32px; max-width: 100%; }
  .vk-hero-sub { font-size: 14px; max-width: 100%; }

  .vk-section-head { margin: 40px 0 4px; }
  .vk-page-title { font-size: 20px; }

  .vk-post-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 32px 20px; }

  .vk-article-title { font-size: 24px; }
  .vk-article-body { font-size: 15px; }
  .vk-article-body h2 { font-size: 19px; }
}

/* ============================================================
   Responsive — smartphone (≤480px)
   ============================================================ */
@media (max-width: 480px) {
  .vk-utility { font-size: 10px; }
  .vk-utility .vk-container { height: auto; flex-direction: column; align-items: flex-start; gap: 4px; padding-top: 6px; padding-bottom: 6px; }
  .vk-utility-links { gap: 14px; }

  .vk-header .vk-container { flex-direction: column; align-items: flex-start; gap: 12px; }
  .vk-nav ul { gap: 16px; }

  .vk-hero { min-height: 380px; }
  .vk-hero-title { font-size: 26px; line-height: 1.3; }
  .vk-hero-eyebrow { font-size: 10px; padding: 5px 12px; }
  .vk-hero-cta { padding: 12px 24px; font-size: 11px; }

  .vk-post-grid { grid-template-columns: 1fr; gap: 36px; }

  .vk-article-title { font-size: 21px; }
}