/* ========================================================================== */
/* */
/* Ubinity Blog System - Global Stylesheet                      */
/* */
/* ========================================================================== */
/*
 * DESCRIPTION:
 * ブログ全体のレイアウト、ヘッダー、フッター、サイドバー、アップロードページなど、
 * 共通パーツのスタイルと、システム全体で利用する基本変数を定義します。
 */

/* ========================================================================== */
/* Part 1: Root Variables & Basic Settings                                    */
/* ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700;900&family=Noto+Serif+JP:wght@400;700&display=swap');

:root {
  /* VI Colors */
  --color-ub-blue: #3B82F6;
  --color-ub-blue-dark: #1E40AF;
  --color-ub-blue-light: #EFF6FF;
  --color-ub-green: #10B981;
  --color-ub-green-dark: #065F46;
  --color-ub-green-light: #F0FDF4;
  --color-ub-purple: #5B21B6;
  --color-ub-purple-dark: #4C1D95;
  --color-ub-purple-light: #F5F3FF;
  --color-ub-gray: #64748B;

  /* Text & Background Colors */
  --color-text: #1f2937;
  --color-text-light: #4b5563;
  --color-border: #e5e7eb;
  --color-background: #ffffff;
  --color-background-soft: #f9fafb;

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-serif: 'Noto Serif JP', serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

body {
    background-color: #f8fafc;
    color: var(--color-text);
    font-family: var(--font-sans);
}

a {
    color: var(--color-ub-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ========================================================================== */
/* Part 2: Blog System Layout & Common Parts                                  */
/* ========================================================================== */

/* --- ヘッダー --- */
.blog-header {
    background-color: white;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.blog-header .logo {
    display: flex;
	gap: 0.75rem;
}

.blog-header .logo a {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.blog-header .logo svg {
    height: 1.75rem;
    width: auto;
    display: block;
}

.blog-header .logo .logo-text {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-light);
    border-left: 2px solid var(--color-border);
    padding-left: 0.75rem;
    line-height: 1;
}

.blog-header .tagline {
    margin: 0;
    font-size: 1rem;
    color: var(--color-text-light);
}

/* --- メインコンテンツエリア --- */
.main-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2.5rem;
    padding: 3rem 2rem;
    max-width: 1280px;
    margin: 0 auto;
    align-items: start;
}

.posts-list {
    grid-column: 1 / 2;
}

.sidebar {
    grid-column: 2 / 3;
    position: sticky;
    top: 2rem;
}

/* --- 記事カード --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.post-card {
    background-color: white;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    margin-bottom: 2rem;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.post-card.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.post-card .post-card-image a {
    display: block;
    width: 100%;
    height: 220px;
    background-color: #e2e8f0;
}

.post-card .post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-card-content { padding: 1.5rem 2rem; }
.post-card-meta { font-size: 0.875rem; color: var(--color-text-light); margin-bottom: 0.75rem; display: flex; align-items: center; gap: 0.5rem; }
.post-card-meta .category-link { background-color: var(--color-ub-blue-light); color: var(--color-ub-blue-dark); padding: 0.2rem 0.6rem; border-radius: 999px; font-weight: 700; font-size: 0.75rem; }
.post-card-meta .category-link:hover { background-color: #dbeafe; }
.post-card-content h2 { font-size: 1.625rem; margin: 0 0 1rem; border: none; padding: 0; line-height: 1.4; }
.post-card-content h2 a { text-decoration: none; color: var(--color-text); }
.post-card-content h2 a:hover { color: var(--color-ub-blue); }
.post-card-excerpt { color: var(--color-text-light); line-height: 1.7; margin-bottom: 1.5rem; }
.post-card-footer { display: flex; justify-content: space-between; align-items: center; }
.post-card-tags a { font-size: 0.8rem; color: var(--color-text-light); margin-right: 0.5rem; text-decoration: none; background-color: #f3f4f6; padding: 0.2rem 0.6rem; border-radius: 4px; transition: background-color 0.2s ease, color 0.2s ease; }
.post-card-tags a:hover { background-color: #e5e7eb; color: var(--color-text); }
.read-more-link { font-weight: 700; text-decoration: none; }

/* --- サイドバー --- */
.sidebar-widget { background-color: white; padding: 1.5rem; border-radius: 12px; border: 1px solid var(--color-border); margin-bottom: 2rem; }
.sidebar-widget h3 { font-size: 1.125rem; margin-top: 0; border: none; padding: 0; border-bottom: 2px solid var(--color-border); padding-bottom: 0.75rem; margin-bottom: 1rem; }
.sidebar-widget ul { list-style: none; padding: 0; margin: 0; }
.sidebar-widget ul li a { display: flex; justify-content: space-between; padding: 0.6rem 0.25rem; color: var(--color-text-light); text-decoration: none; border-radius: 4px; transition: color 0.2s ease, background-color 0.2s ease; }
.sidebar-widget ul li a:hover { color: var(--color-ub-blue); background-color: #f3f4f6; }
.sidebar-widget ul li a.active { background-color: var(--color-ub-blue-light); color: var(--color-ub-blue-dark); font-weight: 700; }
.search-input { width: 100%; padding: 0.75rem; border: 1px solid var(--color-border); border-radius: 8px; font-size: 1rem; transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.search-input:focus { outline: none; border-color: var(--color-ub-blue); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2); }

/* --- フッター --- */
.blog-footer { text-align: center; padding: 2rem; margin-top: 2rem; border-top: 1px solid var(--color-border); background-color: white; color: var(--color-text-light); font-size: 0.9rem; }

/* --- 記事ページ --- */
.article-page-wrapper {
    max-width: 800px;
    margin: 3rem auto;
    padding: 2rem;
    background-color: white;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
}

/* --- ユーティリティ --- */
.loader { border: 5px solid #f3f3f3; border-top: 5px solid var(--color-ub-blue); border-radius: 50%; width: 50px; height: 50px; animation: spin 1s linear infinite; margin: 3rem auto; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.message-box { background-color: white; border: 1px solid var(--color-border); padding: 2rem; border-radius: 12px; text-align: center; color: var(--color-text-light); }
.load-more-container { text-align: center; padding: 1rem 0; }
.load-more-btn { background-color: var(--color-ub-blue); color: white; border: none; padding: 0.75rem 1.5rem; font-size: 1rem; font-weight: 700; border-radius: 8px; cursor: pointer; transition: background-color 0.3s ease; }
.load-more-btn:hover { background-color: var(--color-ub-blue-dark); }
.load-more-btn.hidden { display: none; }

/* --- フォーム共通スタイル --- */
.upload-container { max-width: 800px; margin: 2rem auto; padding: 2rem; background-color: white; border: 1px solid var(--color-border); border-radius: 12px; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-weight: 700; margin-bottom: 0.5rem; }
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="file"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
}
.submit-btn { background-color: var(--color-ub-blue); color: white; border: none; padding: 0.75rem 1.5rem; font-size: 1rem; font-weight: 700; border-radius: 8px; cursor: pointer; transition: background-color 0.3s ease; }
.submit-btn:hover { background-color: var(--color-ub-blue-dark); }
.status-message { margin-top: 1.5rem; padding: 1rem; border-radius: 8px; display: none; }
.status-message.success { background-color: var(--color-ub-green-light); color: var(--color-ub-green-dark); border: 1px solid var(--color-ub-green); }
.status-message.error { background-color: #fef2f2; color: #991b1b; border: 1px solid #f87171; }
.autocomplete-container { position: relative; }
.autocomplete-items { position: absolute; border: 1px solid var(--color-border); z-index: 99; top: calc(100% - 1px); left: 0; right: 0; background-color: white; border-radius: 0 0 8px 8px; max-height: 200px; overflow-y: auto; box-shadow: 0 5px 10px rgba(0,0,0,0.08); }
.autocomplete-items div { padding: 10px; cursor: pointer; }
.autocomplete-items div:hover { background-color: #e9e9e9; }
.autocomplete-active { background-color: DodgerBlue !important; color: #ffffff; }

/* --- レスポンシブ対応 --- */
@media (max-width: 900px) {
    .main-container { grid-template-columns: 1fr; }
    .sidebar { position: static; top: auto; }
    .blog-header { flex-direction: column; gap: 0.5rem; }
    .blog-header .logo .logo-text { display: none; }
    .article-page-wrapper {
        margin: 1.5rem auto;
        padding: 1rem;
    }
}