:root {
    --bg-color: #fcfcfc;
    --text-primary: #050505;
    --text-secondary: #404040;
    --accent-color: #3a86ff;
    --accent-soft: rgba(58, 134, 255, 0.1);
    --border-color: rgba(0, 0, 0, 0.1);
    --font-main: 'Inter', -apple-system, BlinkMacSystemfont, "Segoe UI", Roboto, sans-serif;
    --font-accent: 'Space Grotesk', sans-serif;
}

[data-theme='dark'] {
    --bg-color: #050505;
    --text-primary: #fcfcfc;
    --text-secondary: #a0a0a0;
    --accent-color: #3a86ff;
    --accent-soft: rgba(58, 134, 255, 0.1);
    --border-color: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.4s ease, color 0.4s ease;
}

header {
    padding: 5rem 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 3.5rem;
    letter-spacing: -0.06em;
    font-weight: 800;
    font-family: var(--font-accent);
}

nav {
    margin-top: 2rem;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 3rem;
}

nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    letter-spacing: 0.02em;
    transition: color 0.3s ease, transform 0.2s ease;
}

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

main {
    max-width: 800px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}

footer {
    text-align: center;
    padding: 6rem 2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

/* Section Transitions */
section {
    animation: slideUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero Section Styles */
.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    line-height: 1.1;
    letter-spacing: -0.05em;
    font-weight: 800;
    font-family: var(--font-accent);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

/* Button Styles */
.btn {
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--text-primary);
    background-color: var(--accent-soft);
}

/* About Section Styles */
#about {
    padding: 4rem 0;
}

.content-block {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    line-height: 1.7;
    color: var(--text-secondary);
}

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

/* Blog List View */
#posts-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.post {
    padding-bottom: 1rem;
    transition: opacity 0.3s ease;
}

.post-title {
    font-size: 2rem;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.post-date {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.post-excerpt {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.post-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid var(--accent-color);
    padding-bottom: 2px;
}

.post-link:hover {
    color: var(--accent-color);
}

/* Post Detail View */
#post-detail .back-link {
    display: inline-block;
    margin-bottom: 3rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

#post-detail .back-link:hover {
    color: var(--text-primary);
}

#post-detail .post-title {
    font-size: 3rem;
    letter-spacing: -0.05em;
    margin-bottom: 1rem;
    font-weight: 800;
}

#post-detail .post-date {
    display: block;
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.post-body {
    font-size: 1.25rem;
    line-height: 1.9;
    color: var(--text-secondary);
}

@media (max-width: 600px) {
    header h1 { font-size: 2.5rem; }
    nav ul { gap: 2rem; }
    main { margin: 3rem auto; }
    #post-detail .post-title { font-size: 2.2rem; }
}

/* Modal Styles */
.modal {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7); /* Dim the background */
    z-index: 1;
}

.modal-content {
    position: relative;
    z-index: 2;
    max-width: 80%;
    max-height: 80%;
    text-align: center;
}

.modal-content img {
    max-width: 100%;
    max-height: 70vh;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.close-btn {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .modal-content img {
        max-width: 95%;
    }
}