/*
Theme Name: Gluons
Theme URI: https://gluons.jp
Author: Mogura
Author URI: https://gluons.jp
Description: Gluons コーポレートサイト公式テーマ。人とテクノロジーを強い力で結びつける。
Version: 1.0.0
License: Proprietary
License URI: https://gluons.jp/terms/
Text Domain: gluons
Tags: corporate, blog, responsive, clean
*/

/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
  /* Monochrome palette */
  --color-primary:      #0D0D0D;
  --color-primary-dark: #000000;
  --color-secondary:    #444444;
  --color-secondary-dark: #222222;
  --color-teal:         #666666;
  --color-bg:           #FFFFFF;
  --color-bg-soft:      #F4F4F4;
  --color-bg-dark:      #0D0D0D;
  --color-text:         #0D0D0D;
  --color-text-soft:    #999999;
  --color-text-muted:   #6B6B6B;
  --color-text-inv:     #FFFFFF;
  --color-border:       #E2E2E2;

  --color-accent:       #f97316;
  --color-accent-hover: #ea6c0a;
  --color-accent-light: #fff4ed;

  --font-jp: 'Noto Sans JP', sans-serif;
  --font-en: 'Figtree', 'Inter', sans-serif;

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-bold:    700;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 8px 32px rgba(0,0,0,.12);
  --shadow-lg: 0 20px 60px rgba(0,0,0,.18);

  --transition: 0.3s ease;

  --container-max: 1200px;
  --container-pad: clamp(1rem, 5vw, 2rem);

  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-jp);
  font-weight: var(--fw-regular);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--fw-bold);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

/* ============================================================
   Layout Utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: clamp(4rem, 10vw, 7rem);
}

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

.section__header {
  text-align: center;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.section__label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.3em 1em;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.section__title {
  margin-bottom: 1rem;
}

.section__desc {
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75em 2em;
  border-radius: var(--radius-full);
  font-weight: var(--fw-bold);
  font-size: 0.95rem;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
}

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

.btn:disabled,
.btn[disabled] {
  background: #D4D4D4;
  border-color: #D4D4D4;
  color: #999;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
  opacity: 1;
}

.btn:disabled:hover,
.btn[disabled]:hover {
  background: #D4D4D4;
  border-color: #D4D4D4;
  color: #999;
}

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

.btn--secondary {
  background: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
}

.btn--secondary:hover {
  background: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,107,107,.25);
}

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

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn--lg {
  padding: 1em 2.5em;
  font-size: 1.05rem;
}

/* Hero inverse buttons (used on dark backgrounds) */
.btn--inv {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}

.btn--inv:hover {
  background: rgba(255,255,255,.88);
  border-color: rgba(255,255,255,.88);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-accent);
}

.btn--ghost:hover {
  color: var(--color-text);
  transform: translateY(-2px);
}

/* ============================================================
   Card — unified / component: template-parts/card.php
   ============================================================ */
.card {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: var(--color-bg);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: rgba(249,115,22,0.3);
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}

/* ─ Thumbnail（padding-top 比率固定 16:9）─ */
.card__thumb {
  display: block;
  position: relative;
  padding-top: 56.25%; /* 9/16 */
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.card__thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s ease;
}

.card:hover .card__thumb img {
  transform: scale(1.04);
}

/* ─ Body ─ */
.card__body {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

/* ─ Meta: date + category ─ */
.card__meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.card__date {
  font-family: var(--font-en);
  font-size: 0.68rem;
  color: #bbb;
  letter-spacing: 0.06em;
}

.card__cat {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.62rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border: 1px solid rgba(249,115,22,0.2);
  padding: 0.18em 0.65em;
  border-radius: var(--radius-full);
  text-decoration: none;
  position: relative;
  z-index: 1;
}

.card__cat:hover {
  background: rgba(249,115,22,0.14);
  color: var(--color-accent);
}

/* ─ Title ─ */
.card__title {
  font-size: 0.97rem;
  font-weight: var(--fw-bold);
  line-height: 1.6;
  margin: 0;
}

/* stretched-link: カード全体をリンクに */
.card__link {
  color: var(--color-text);
  text-decoration: none;
}

.card__link::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
}

.card__linkText {
  font-size: 10px;
  color: var(--color-text-soft);
  text-decoration: none;
}

.card:hover .card__link {
  color: var(--color-accent);
}

/* ============================================================
   Grid layouts
   ============================================================ */
.grid--3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.grid--2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 2rem;
}

/* ============================================================
   Fade-up animation
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }
.fade-up:nth-child(6) { transition-delay: 0.5s; }

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.breadcrumb li + li::before {
  content: '/';
  margin-right: 0.25rem;
  color: var(--color-border);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

/* ============================================================
   Page Hero (inner pages)
   ============================================================ */
.page-hero {
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
  padding: clamp(3rem, 8vw, 5rem) 0 clamp(2rem, 5vw, 3rem);
  text-align: center;
}

.page-hero__label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: block;
  margin-bottom: 0.5rem;
}

.page-hero__title {
  margin-bottom: 0;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 767px) {
  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   Tools
   ============================================================ */
.tool-card__link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent, #f97316);
  text-decoration: none;
  transition: opacity 0.2s;
}
.tool-card__link:hover {
  opacity: 0.75;
}
.tools-empty {
  text-align: center;
  color: #888;
  padding: 48px 0;
}