/* ==========================================================================
   style.css - 共通スタイル
   ========================================================================== */

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
    --primary-color: #2DA4A7;
    --primary-dark: #238F92;
    --primary-light: #3BB8BB;
    --gradient-primary: linear-gradient(135deg, #2DA4A7 0%, #45B7D1 50%, #6DD5ED 100%);
    --gradient-accent: linear-gradient(90deg, #2DA4A7, #45B7D1, #96E6A1);
    --text-dark: #1a1a1a;
    --text-muted: #6c757d;
    --bg-light: #f8fafa;
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(45, 164, 167, 0.08);
    --shadow-md: 0 4px 20px rgba(45, 164, 167, 0.12);
    --shadow-lg: 0 8px 40px rgba(45, 164, 167, 0.15);
    --transition: all 0.3s ease;
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.8;
    color: var(--text-dark);
    background: var(--white);
}

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

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

/* ==========================================================================
   Header Styles
   ========================================================================== */
.site-header {
    background: var(--white);
}

.top-bar {
    background: var(--gradient-primary);
    font-size: 0.8125rem;
}

.top-bar a {
    color: rgba(255, 255, 255, 0.85);
}

.top-bar a:hover {
    color: var(--white);
}

/* グローバルナビゲーション */
.navbar {
    padding: 0;
    background: var(--white) !important;
    box-shadow: var(--shadow-sm);
}

.navbar > .container {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.navbar-nav {
    gap: 0.25rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--text-dark) !important;
    padding: 0.75rem 1.25rem !important;
    position: relative;
    border-radius: 8px;
    transition: var(--transition);
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
    border-radius: 2px;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(45, 164, 167, 0.05);
}

.navbar-nav .nav-link:hover::before,
.navbar-nav .nav-link.active::before {
    width: 20px;
}

.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
}

/* ドロップダウンメニュー - ホバーで表示 */
@media (min-width: 992px) {
    .navbar .dropdown:hover > .dropdown-menu {
        display: block;
        margin-top: 0;
    }

    .navbar .dropdown > .dropdown-menu {
        margin-top: 0.5rem;
    }
}

.navbar .dropdown-menu {
    border: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    border-radius: 12px;
    padding: 0.75rem;
    min-width: 220px;
    animation: dropdownFade 0.2s ease;
}

@keyframes dropdownFade {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.navbar .dropdown-item {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
}

/* メニューアイコン（カテゴリーアイコン・マスク方式） */
.navbar .dropdown-item .menu-icon-img {
    width: 16px;
    height: 16px;
    display: inline-block;
    flex-shrink: 0;
    -webkit-mask-size: contain;
    mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
}

.navbar .dropdown-item .menu-text {
    flex: 1;
}

.navbar .dropdown-item .menu-count {
    font-size: 0.75rem;
    background: var(--bg-light);
    padding: 0.125rem 0.5rem;
    border-radius: 50px;
    color: var(--text-muted);
    margin-left: auto;
}

.navbar .dropdown-item i {
    font-size: 1rem;
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.navbar .dropdown-item:hover {
    background: rgba(45, 164, 167, 0.08);
    color: var(--primary-color);
    transform: translateX(4px);
}
}

/* アクティブ状態（Bootstrapの.dropdown-item.activeを上書き） */
.dropdown-item.active,
.dropdown-item:active {
    background-color: transparent;
    color: var(--text-dark);
}

.navbar .dropdown-toggle::after {
    margin-left: 0.5rem;
    transition: var(--transition);
}

.navbar .dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

/* 検索フォーム */
.navbar .search-form {
    position: relative;
}

.navbar .search-form .form-control {
    border-radius: 50px;
    padding: 0.625rem 1rem;
    padding-right: 2.75rem;
    border: 1px solid #e0e0e0;
    width: 200px;
    transition: var(--transition);
}

.navbar .search-form .form-control:focus {
    width: 260px;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(45, 164, 167, 0.1);
}

.search-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gradient-primary);
    border: none;
    color: var(--white);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.05);
    color: var(--white);
}

/* モバイルメニュー */
.navbar-toggler {
    border: none;
    padding: 0.5rem;
    border-radius: 8px;
}

.navbar-toggler:focus {
    box-shadow: none;
}

@media (max-width: 991.98px) {
    .navbar-collapse {
        background: var(--white);
        padding: 1rem;
        border-radius: 12px;
        margin-top: 1rem;
        box-shadow: var(--shadow-md);
    }

    .navbar-nav .nav-link {
        padding: 1rem !important;
    }

    .navbar .search-form .form-control {
        width: 100%;
    }

    .navbar .search-form .form-control:focus {
        width: 100%;
    }

    .navbar .dropdown-menu {
        box-shadow: none;
        padding-left: 1rem;
        border: none;
        background: transparent;
    }
    
    .navbar .dropdown-menu .dropdown-item {
        padding: 0.625rem 1rem;
    }
    
    .navbar .dropdown-menu .dropdown-item::before {
        width: 20px;
        height: 20px;
        font-size: 0.875rem;
    }
}

/* ==========================================================================
   Section Styles
   ========================================================================== */
.section-title {
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-see-all {
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 50px;
    font-weight: 500;
    padding: 0.375rem 1rem;
}

.btn-see-all:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--white);
}

/* ==========================================================================
   Card Styles - 画像比率 741:461 固定
   ========================================================================== */
.card {
    border: none;
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.card-hover:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-img-wrapper {
    position: relative;
    overflow: hidden;
}

.card-img-wrapper img,
.card-img-top {
    width: 100%;
    aspect-ratio: 741 / 461;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card-hover:hover .card-img-wrapper img {
    transform: scale(1.05);
}

/* Category Tags - Multiple Colors */
.tag-technology { background: #3B82F6; }
.tag-lifestyle { background: #10B981; }
.tag-business { background: #F59E0B; }
.tag-travel { background: #EC4899; }
.tag-food { background: #EF4444; }
.tag-health { background: #8B5CF6; }

.category-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    color: var(--white);
    display: inline-block;
}

/* Author Avatar */
.author-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.card-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Footer Styles
   ========================================================================== */
.site-footer {
    background: linear-gradient(180deg, #1a1a1a 0%, #0d0d0d 100%);
    padding-top: 3.5rem;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--white);
    transform: translateY(-3px);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
    display: block;
    padding: 0.375rem 0;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 0.5rem;
}

.footer-tag {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    padding: 0.375rem 0.875rem;
    border-radius: 50px;
    font-size: 0.8125rem;
    transition: var(--transition);
}

.footer-tag:hover {
    background: var(--gradient-primary);
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 1rem;
}

/* Footer Responsive */
@media (max-width: 767.98px) {
    .site-footer {
        padding-top: 2.5rem;
        text-align: center;
    }

    .site-footer .footer-social {
        justify-content: center;
    }

    .site-footer .footer-tags {
        justify-content: center;
    }

    .footer-links a:hover {
        padding-left: 0;
    }

    .footer-bottom .col-md-6 {
        margin-bottom: 0.25rem;
    }
}

/* ==========================================================================
   Back to Top
   ========================================================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: var(--gradient-primary);
}

/* ==========================================================================
   Responsive - Common
   ========================================================================== */
@media (max-width: 767.98px) {
    .top-bar {
        display: none !important;
    }
}