/*
Theme Name: TravelStarter
Theme URI: https://example.com/travelstarter
Author: Your Name
Author URI: https://example.com
Description: スマホ対応のおしゃれな旅行アフィリエイトテーマ
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: travelstarter
Tags: blog, one-column, two-columns, right-sidebar, custom-background, custom-colors, custom-header, custom-logo, custom-menu, editor-style, featured-images, footer-widgets, full-width-template, post-formats, theme-options, translation-ready
*/

/* ================================================
   CSS Variables
   ================================================ */
:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-primary-light: #e0f2fe;
    --color-secondary: #f97316;
    --color-accent: #10b981;
    --color-dark: #0f172a;
    --color-gray-900: #1e293b;
    --color-gray-700: #334155;
    --color-gray-500: #64748b;
    --color-gray-300: #cbd5e1;
    --color-gray-100: #f1f5f9;
    --color-white: #ffffff;
    --color-bg: #f8fafc;
    --color-border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
    --font-serif: 'Noto Serif JP', Georgia, serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    line-height: 1.7;
    color: var(--color-gray-700);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    color: var(--color-dark);
    font-weight: 700;
    line-height: 1.3;
}

/* ================================================
   Container
   ================================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 30px;
    }
}

/* ================================================
   Header
   ================================================ */
.site-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: var(--color-dark);
    text-decoration: none;
}

.site-logo img {
    height: 36px;
    width: auto;
}

.site-logo:hover {
    color: var(--color-primary);
}

/* ハンバーガーメニュー */
.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    gap: 5px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ナビゲーション */
.main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: 20px;
}

.main-nav.active {
    display: block;
}

.main-nav ul {
    list-style: none;
}

.main-nav li {
    border-bottom: 1px solid var(--color-border);
}

.main-nav li:last-child {
    border-bottom: none;
}

.main-nav a {
    display: block;
    padding: 12px 0;
    color: var(--color-gray-700);
    font-weight: 500;
    font-size: 15px;
}

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

@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }

    .main-nav {
        display: block;
        position: static;
        background: none;
        border: none;
        box-shadow: none;
        padding: 0;
    }

    .main-nav ul {
        display: flex;
        gap: 5px;
    }

    .main-nav li {
        border: none;
    }

    .main-nav a {
        padding: 8px 16px;
        border-radius: var(--radius-full);
        font-size: 14px;
    }

    .main-nav a:hover {
        background: var(--color-primary-light);
        color: var(--color-primary-dark);
    }
}

/* ================================================
   Hero Section
   ================================================ */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0369a1 100%);
    color: var(--color-white);
    padding: 60px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,186.7C384,213,480,235,576,213.3C672,192,768,128,864,128C960,128,1056,192,1152,213.3C1248,235,1344,213,1392,202.7L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero p {
    font-size: clamp(16px, 2.5vw, 20px);
    opacity: 0.9;
    margin-bottom: 30px;
}

.hero-search {
    display: flex;
    gap: 10px;
    max-width: 500px;
    margin: 0 auto;
}

.hero-search input {
    flex: 1;
    padding: 14px 20px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 16px;
    outline: none;
    box-shadow: var(--shadow-lg);
}

.hero-search button {
    padding: 14px 28px;
    background: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-full);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.hero-search button:hover {
    background: #ea580c;
    transform: translateY(-2px);
}

@media (max-width: 480px) {
    .hero {
        padding: 40px 15px;
    }

    .hero-search {
        flex-direction: column;
    }

    .hero-search button {
        width: 100%;
    }
}

/* ================================================
   Section Titles
   ================================================ */
.section-title {
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 30px;
    position: relative;
    padding-left: 16px;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-primary);
    border-radius: 2px;
}

/* ================================================
   Content Area
   ================================================ */
.site-content {
    padding: 40px 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

@media (min-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr 320px;
    }
}

/* ================================================
   Post Cards
   ================================================ */
.post-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    margin-bottom: 24px;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.post-card-image {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
}

.post-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.post-card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
}

.post-card-content {
    padding: 20px;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--color-gray-500);
    margin-bottom: 10px;
}

.post-card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.post-card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
}

.post-card-title a {
    color: var(--color-dark);
}

.post-card-title a:hover {
    color: var(--color-primary);
}

.post-card-excerpt {
    font-size: 14px;
    color: var(--color-gray-500);
    line-height: 1.6;
    margin-bottom: 15px;
}

.post-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 15px;
    border-top: 1px solid var(--color-border);
}

.post-card-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.post-card-author img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.post-card-author-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-dark);
}

.read-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.read-more:hover {
    gap: 8px;
}

/* ================================================
   Hotel Card (Affiliate)
   ================================================ */
.hotel-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    margin-bottom: 20px;
}

.hotel-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.hotel-card-image {
    position: relative;
    padding-top: 60%;
    overflow: hidden;
}

.hotel-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hotel-card-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 700;
}

.hotel-card-content {
    padding: 18px;
}

.hotel-card-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
}

.hotel-card-title a {
    color: var(--color-dark);
}

.hotel-card-location {
    font-size: 13px;
    color: var(--color-gray-500);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.hotel-card-rating {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
}

.hotel-card-stars {
    color: #fbbf24;
    font-size: 14px;
}

.hotel-card-score {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-dark);
}

.hotel-card-count {
    font-size: 12px;
    color: var(--color-gray-500);
}

.hotel-card-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 15px;
}

.hotel-card-price-label {
    font-size: 12px;
    color: var(--color-gray-500);
}

.hotel-card-price-value {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-secondary);
}

.hotel-card-price-unit {
    font-size: 13px;
    color: var(--color-gray-500);
}

.hotel-card-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.hotel-card-btn:hover {
    background: #ea580c;
    color: var(--color-white);
    transform: translateY(-1px);
}

/* ================================================
   Sidebar
   ================================================ */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-widget {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.sidebar-widget-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
}

/* 検索ウィジェット */
.search-widget input[type="text"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    margin-bottom: 10px;
    outline: none;
    transition: var(--transition);
}

.search-widget input[type="text"]:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.search-widget button {
    width: 100%;
    padding: 12px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-widget button:hover {
    background: var(--color-primary-dark);
}

/* 人気記事ウィジェット */
.popular-posts li {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.popular-posts li:last-child {
    border-bottom: none;
}

.popular-posts-thumb {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
}

.popular-posts-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.popular-posts-info {
    flex: 1;
}

.popular-posts-title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 4px;
}

.popular-posts-title a {
    color: var(--color-dark);
}

.popular-posts-title a:hover {
    color: var(--color-primary);
}

.popular-posts-date {
    font-size: 12px;
    color: var(--color-gray-500);
}

/* カテゴリーウィジェット */
.category-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
}

.category-list li:last-child {
    border-bottom: none;
}

.category-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-gray-700);
    font-size: 14px;
}

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

.category-list .count {
    background: var(--color-gray-100);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 12px;
}

/* ================================================
   Footer
   ================================================ */
.site-footer {
    background: var(--color-dark);
    color: var(--color-gray-300);
    padding: 50px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-section h4 {
    color: var(--color-white);
    font-size: 16px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
}

.footer-section p {
    font-size: 14px;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    padding: 6px 0;
}

.footer-section a {
    color: var(--color-gray-300);
    font-size: 14px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--color-gray-700);
    font-size: 13px;
    color: var(--color-gray-500);
}

.footer-bottom a {
    color: var(--color-primary);
}

/* ================================================
   Page Header
   ================================================ */
.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0369a1 100%);
    color: var(--color-white);
    padding: 50px 20px;
    text-align: center;
}

.page-header h1 {
    font-size: clamp(24px, 4vw, 36px);
    color: var(--color-white);
    margin-bottom: 10px;
}

.page-header .breadcrumb {
    font-size: 14px;
    opacity: 0.8;
}

.page-header .breadcrumb a {
    color: var(--color-white);
}

/* ================================================
   Single Post
   ================================================ */
.single-content {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

@media (max-width: 767px) {
    .single-content {
        padding: 20px 15px;
    }
}

.single-content .entry-title {
    font-size: clamp(22px, 4vw, 32px);
    margin-bottom: 15px;
    line-height: 1.3;
}

.single-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 14px;
    color: var(--color-gray-500);
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.single-thumbnail {
    margin-bottom: 25px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.single-thumbnail img {
    width: 100%;
    height: auto;
}

/* 本文スタイル */
.entry-content {
    font-size: 16px;
    line-height: 1.9;
}

.entry-content h2 {
    font-size: 24px;
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
}

.entry-content h3 {
    font-size: 20px;
    margin: 30px 0 15px;
}

.entry-content p {
    margin-bottom: 20px;
}

.entry-content ul, .entry-content ol {
    margin: 20px 0;
    padding-left: 25px;
}

.entry-content li {
    margin-bottom: 10px;
}

.entry-content blockquote {
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    padding: 20px;
    margin: 25px 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

.entry-content img {
    border-radius: var(--radius-md);
    margin: 20px 0;
}

.entry-content code {
    background: var(--color-gray-100);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
}

.entry-content pre {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 20px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 20px 0;
}

.entry-content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* ================================================
   Pagination
   ================================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.pagination .page-numbers {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-700);
    transition: var(--transition);
}

.pagination .page-numbers:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.pagination .page-numbers.current {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* ================================================
   Hotel Grid
   ================================================ */
.hotel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

@media (max-width: 640px) {
    .hotel-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================================
   Affiliate Disclosure
   ================================================ */
.affiliate-disclosure {
    background: #fffbeb;
    border: 1px solid #fcd34d;
    border-radius: var(--radius-md);
    padding: 15px 20px;
    margin: 20px 0;
    font-size: 13px;
    color: #92400e;
    line-height: 1.6;
}

/* ================================================
   Back to Top
   ================================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}

/* ================================================
   Utilities
   ================================================ */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute !important;
    width: 1px;
    word-wrap: normal !important;
}

.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }