/*
Theme Name: KaSpI Space Theme
Theme URI: http://www.kaspi.jp
Author: KaSpI Migration
Author URI: http://www.kaspi.jp
Description: 関西宇宙イニシアティブ（KaSpI）公式WordPressテーマ。宇宙をテーマにしたモダンでレスポンシブなデザイン。
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: kaspi
Tags: space, japanese, responsive, tailwind
*/

/* === Reset & Base ============================================= */
:root {
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-accent: #38bdf8;
  --color-bg-dark: #0f172a;
  --color-bg-card: #1e293b;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--color-bg-dark);
  color: var(--color-text);
  line-height: 1.8;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--color-primary);
}

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

/* === WordPress Core Styles ==================================== */
.aligncenter {
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.alignleft {
  float: left;
  margin: 0 1.5em 1.5em 0;
}
.alignright {
  float: right;
  margin: 0 0 1.5em 1.5em;
}
.wp-caption {
  max-width: 100%;
}
.wp-caption-text {
  font-size: 0.85em;
  color: var(--color-text-muted);
  text-align: center;
}
.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
}

/* === Sticky Header Background ================================= */
.site-header {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
}

/* === Article Content Styles =================================== */
.entry-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-accent);
}
.entry-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}
.entry-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}
.entry-content p {
  margin-bottom: 1rem;
}
.entry-content ul, .entry-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}
.entry-content th, .entry-content td {
  border: 1px solid var(--color-border);
  padding: 0.75rem;
  text-align: left;
}
.entry-content th {
  background-color: var(--color-bg-card);
  font-weight: 600;
}
.entry-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--color-text-muted);
  font-style: italic;
}

/* === Seminar Cards ============================================ */
.seminar-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.seminar-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.15);
  border-color: var(--color-primary);
}
.seminar-card .seminar-number {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 0.75rem;
}
.seminar-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}
.seminar-card .seminar-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* === Footer =================================================== */
.site-footer {
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-dark) 100%);
  border-top: 1px solid var(--color-border);
}

/* === Animations =============================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.animate-fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* === Star Background ========================================== */
.stars-bg {
  position: relative;
  overflow: hidden;
}
.stars-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(2px 2px at 20% 30%, rgba(255,255,255,0.3), transparent),
    radial-gradient(2px 2px at 40% 70%, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 60% 20%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 80% 50%, rgba(255,255,255,0.3), transparent),
    radial-gradient(2px 2px at 10% 80%, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 90% 10%, rgba(255,255,255,0.3), transparent);
  pointer-events: none;
  z-index: 0;
}