/* ===== BASE STYLES (共通部分) ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ff6b35;
    --secondary-color: #ff8c42;
    --bg-color: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --text-color: #ffffff;
    --text-secondary: #cccccc;
    --border-color: #333333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    background: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-secondary {
    color: var(--text-color);
    border-color: var(--text-color);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

/* PROJECT DETAIL SPECIFIC STYLES */

/* Breadcrumb */
.breadcrumb {
    padding-top: 100px;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.breadcrumb span {
    margin: 0 0.5rem;
}

/* Project Hero */
.project-hero {
    padding: 2rem 0 4rem;
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
}

.project-hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.project-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.project-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.project-meta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.meta-item {
    color: var(--text-secondary);
}

.meta-item strong {
    color: var(--text-color);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-main-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(255, 107, 53, 0.2);
}

/* Project Overview */
.project-overview {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.overview-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.overview-content h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 2rem;
}

.overview-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.tech-stack h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.tech-categories {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tech-category h4 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-item {
    background: var(--bg-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.1);
    box-shadow: 0 5px 15px rgba(255, 107, 53, 0.3);
}

/* Project Features */
.project-features {
    padding: 4rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Project Gallery */
.project-gallery {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--text-color);
    padding: 2rem 1rem 1rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Challenges and Solutions */
.challenges-solutions {
    padding: 4rem 0;
}

.challenges-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.challenge-item {
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.challenge-item:hover {
    border-color: var(--primary-color);
}

.challenge-header {
    background: var(--primary-color);
    padding: 1rem 2rem;
}

.challenge-header h3 {
    color: var(--text-color);
}

.challenge-content {
    padding: 2rem;
}

.challenge-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.challenge-content strong {
    color: var(--text-color);
}

/* Results */
.project-results {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.results-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.results-text h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.results-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.results-list {
    list-style: none;
    padding: 0;
}

.results-list li {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
}

.results-list li::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.results-stats h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat-card {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Related Projects */
.related-projects {
    padding: 4rem 0;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.related-project {
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.related-project:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.related-project img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.related-content {
    padding: 1.5rem;
}

.related-content h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.related-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    position: relative;
    margin: auto;
    padding: 20px;
    width: 90%;
    max-width: 800px;
    top: 50%;
    transform: translateY(-50%);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateY(-50%) scale(0.8); }
    to { transform: translateY(-50%) scale(1); }
}

.modal-content img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: var(--text-color);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

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

#modalCaption {
    text-align: center;
    color: var(--text-color);
    padding: 10px 0;
    font-size: 1.2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu a {
        padding: 1rem;
        display: block;
    }

    .project-hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .project-title {
        font-size: 2rem;
    }

    .overview-grid {
        grid-template-columns: 1fr;
    }

    .tech-categories {
        margin-top: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .results-content {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        margin-top: 2rem;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        justify-content: center;
        text-align: center;
    }

    .project-links {
        justify-content: center;
    }

    .breadcrumb {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .project-meta {
        font-size: 0.9rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.animate {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll Progress Bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--primary-color);
    z-index: 2000;
    transition: width 0.1s ease;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

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

.scroll-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

/* Loading Animation */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--bg-color);
    z-index: 3000;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Hamburger Animation */
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Active nav link */
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    width: 100%;
}

/* Print styles */
@media print {
    .navbar, .scroll-to-top, .progress-bar, .modal { 
        display: none !important; 
    }
    body { 
        background: white !important; 
        color: black !important; 
    }
    .project-hero { 
        background: white !important; 
    }
    .btn { 
        border: 1px solid black !important; 
    }
}