/* General Styles & Variables */
:root {
    --bg-light: #f8f9fa;
    --text-light: #212529;
    --secondary-text-light: #6c757d;
    --card-bg-light: #ffffff;
    --card-border-light: #e9ecef;
    --link-light: #007bff;
    --header-bg-light: rgba(255, 255, 255, 0.8);
    --nav-link-light: #495057;
    --nav-link-hover-light: #007bff;
    --aura-glow: 0 0 20px rgba(0, 123, 255, 0.15);

    --bg-dark: #121212;
    --text-dark: #e0e0e0;
    --secondary-text-dark: #adb5bd;
    --card-bg-dark: #1e1e1e;
    --card-border-dark: #343a40;
    --link-dark: #bb86fc;
    --header-bg-dark: rgba(30, 30, 30, 0.8);
    --nav-link-dark: #ced4da;
    --nav-link-hover-dark: #bb86fc;
    --aura-glow-dark: 0 0 20px rgba(187, 134, 252, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.7;
    margin: 0;
    padding: 0;
    background-color: var(--bg-light);
    color: var(--text-light);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 90%;
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 15px;
}

/* Header & Navigation */
header {
    background-color: var(--header-bg-light);
    border-bottom: 1px solid var(--card-border-light);
    padding: 1rem 0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

header h1 {
    margin: 0 0 0.25rem 0;
    font-size: 2rem;
    font-weight: 600;
}

header h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 300;
    color: var(--secondary-text-light);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

nav ul li a {
    color: var(--nav-link-light);
    text-decoration: none;
    padding: 5px 10px;
    border-radius: 5px;
    font-weight: 500;
    transition: color 0.2s ease, background-color 0.2s ease;
}

nav ul li a:hover {
    color: var(--nav-link-hover-light);
    background-color: rgba(0, 123, 255, 0.1);
}

/* Main Content & Cards */
section {
    background-color: var(--card-bg-light);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--card-border-light);
    box-shadow: var(--aura-glow);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

section h2, section h3 {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 1rem;
    color: var(--text-light);
}

/* Links */
a {
    color: var(--link-light);
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    text-decoration: underline;
}

/* Blog Post Specifics */
.blog-post {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--card-border-light);
}

.blog-post:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.post-meta {
    color: var(--secondary-text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    color: var(--secondary-text-light);
}

/* Dark Mode Styles */
html.dark-mode body {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

html.dark-mode header {
    background-color: var(--header-bg-dark);
    border-bottom: 1px solid var(--card-border-dark);
}

html.dark-mode header h2 {
    color: var(--secondary-text-dark);
}

html.dark-mode nav ul li a {
    color: var(--nav-link-dark);
}

html.dark-mode nav ul li a:hover {
    color: var(--nav-link-hover-dark);
    background-color: rgba(187, 134, 252, 0.1);
}

html.dark-mode section {
    background-color: var(--card-bg-dark);
    border: 1px solid var(--card-border-dark);
    box-shadow: var(--aura-glow-dark);
}

html.dark-mode section h2, html.dark-mode section h3 {
    color: var(--text-dark);
}

html.dark-mode a {
    color: var(--link-dark);
}

html.dark-mode .blog-post {
    border-bottom: 1px solid var(--card-border-dark);
}

html.dark-mode .post-meta {
    color: var(--secondary-text-dark);
}

html.dark-mode footer {
    color: var(--secondary-text-dark);
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }
    nav ul {
        gap: 10px;
    }
    nav ul li a {
        padding: 5px;
    }
    .container {
        padding: 1rem 15px;
    }
}

/* Theme Toggle Button */
#theme-toggle {
    background: none;
    border: 1px solid var(--card-border-light);
    color: var(--text-light);
    cursor: pointer;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin: 1rem auto 0;
    transition: all 0.3s ease;
}

#theme-toggle:hover {
    border-color: var(--link-light);
    color: var(--link-light);
}

html.dark-mode #theme-toggle {
    border-color: var(--card-border-dark);
    color: var(--text-dark);
}

html.dark-mode #theme-toggle:hover {
    border-color: var(--link-dark);
    color: var(--link-dark);
}

/* Project Filter Buttons */
#category-filters {
    margin-bottom: 2rem;
    display: flex;
    gap: 10px;
}

#category-filters button {
    background-color: transparent;
    border: 1px solid var(--card-border-light);
    color: var(--nav-link-light);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

#category-filters button:hover {
    background-color: rgba(0, 123, 255, 0.1);
    color: var(--nav-link-hover-light);
    border-color: var(--link-light);
}

html.dark-mode #category-filters button {
    border-color: var(--card-border-dark);
    color: var(--nav-link-dark);
}

html.dark-mode #category-filters button:hover {
    background-color: rgba(187, 134, 252, 0.1);
    color: var(--nav-link-hover-dark);
    border-color: var(--link-dark);
}