/* ========================================
   Kurumi's Personal Website
   Modern, Clean, Responsive Design
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #f3f4f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #ffffff;
    --bg-dark: #111827;
    --bg-card: #f9fafb;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-light);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

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

/* Layout Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Navigation */
header {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.95);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--secondary-color);
    color: var(--primary-color);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* Main Content */
main {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

/* Sections */
section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    color: var(--text-dark);
}

/* Hero Section (Homepage) */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
    border-radius: var(--radius);
    margin-bottom: 3rem;
}

.hero h1 {
    color: white;
    margin-bottom: 1rem;
}

.hero .tagline {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.hero .introduction {
    max-width: 700px;
    margin: 0 auto 2rem;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
}

.discord-btn {
    display: inline-block;
    background: #5865F2;
    color: white;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.discord-btn:hover {
    background: #4752C4;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Mottos Section */
.mottos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.motto-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.motto-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.motto-card blockquote {
    font-size: 1.2rem;
    font-style: italic;
    color: var(--text-dark);
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin-bottom: 1rem;
}

.motto-card cite {
    color: var(--text-light);
    font-weight: 500;
}

/* Blog Section */
.blog-list {
    display: grid;
    gap: 2rem;
}

.blog-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.blog-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.blog-card h3 {
    margin-bottom: 0.5rem;
}

.blog-card .meta {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.blog-card .excerpt {
    margin-bottom: 1.5rem;
}

.read-more {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
}

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

/* Blog Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination button,
.pagination a {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-light);
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
}

.pagination button:hover,
.pagination a:hover {
    background: var(--secondary-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Wallpaper Grid */
.wallpaper-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.wallpaper-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.wallpaper-card:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-lg);
}

.wallpaper-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.wallpaper-card .content {
    padding: 1.25rem;
}

.wallpaper-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.wallpaper-card p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.steam-btn {
    display: inline-block;
    background: #1b2838;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    transition: var(--transition);
}

.steam-btn:hover {
    background: #2a475e;
    color: white;
}

/* Footer */
footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0;
    margin-top: 4rem;
}

footer p {
    color: #9ca3af;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
    list-style: none;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: var(--transition);
}

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

/* Blog Post Page */
.blog-post {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.blog-post header {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.blog-post h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.blog-post .post-meta {
    color: var(--text-light);
    margin-bottom: 0;
}

.post-content {
    line-height: 1.8;
    font-size: 1.1rem;
}

.post-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1.5rem;
}

.post-content p {
    margin-bottom: 1.5rem;
}

.post-content code {
    background: var(--secondary-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.post-content pre {
    background: var(--bg-dark);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.post-content pre code {
    background: transparent;
    padding: 0;
}

.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.3rem; }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-light);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        padding: 3rem 1.5rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .tagline {
        font-size: 1.2rem;
    }

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

    .blog-post {
        padding: 1.5rem;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .blog-card,
    .wallpaper-card {
        padding: 1.5rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* Utility Classes */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }