/* Base Variables */
:root {
    /* Light Theme (Default) */
    --bg-color: #f4f7f6;
    --text-color: #333333;
    --text-muted: #666666;
    
    --card-bg: rgba(255, 255, 255, 0.6);
    --card-border: rgba(255, 255, 255, 0.5);
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --card-blur: blur(10px);
    
    --primary-color: #2a7ae2;
    --accent-color: #ff6b6b;
    
    --tag-project: #e3f2fd;
    --tag-project-text: #1976d2;
    --tag-tutorial: #e8f5e9;
    --tag-tutorial-text: #388e3c;
    --tag-blog: #fff3e0;
    --tag-blog-text: #f57c00;
    --tag-upcoming: #f3e5f5;
    --tag-upcoming-text: #7b1fa2;

    --progress-bg: #e0e0e0;
    --progress-fill: #2a7ae2;
    --progress-complete: #4caf50;
    --progress-archived: #9e9e9e;
    --progress-planning: #ab47bc;

    --btn-bg: rgba(255, 255, 255, 0.8);
    --btn-hover: rgba(255, 255, 255, 1);
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    
    --card-bg: rgba(30, 30, 30, 0.6);
    --card-border: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --card-blur: blur(12px);
    
    --primary-color: #64b5f6;
    --accent-color: #ff8a80;

    --tag-project: rgba(25, 118, 210, 0.3);
    --tag-project-text: #90caf9;
    --tag-tutorial: rgba(56, 142, 60, 0.3);
    --tag-tutorial-text: #a5d6a7;
    --tag-blog: rgba(245, 124, 0, 0.3);
    --tag-blog-text: #ffcc80;
    --tag-upcoming: rgba(123, 31, 162, 0.3);
    --tag-upcoming-text: #ce93d8;

    --progress-bg: #424242;
    --progress-fill: #64b5f6;
    --progress-complete: #81c784;
    --progress-archived: #757575;
    --progress-planning: #ba68c8;

    --btn-bg: rgba(255, 255, 255, 0.1);
    --btn-hover: rgba(255, 255, 255, 0.2);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

/* Optional Background Decoration for Glassmorphism Effect */
body::before {
    content: '';
    position: fixed;
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 60%);
    opacity: 0.1;
    z-index: -1;
    border-radius: 50%;
    filter: blur(60px);
}

body::after {
    content: '';
    position: fixed;
    bottom: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent-color) 0%, transparent 60%);
    opacity: 0.08;
    z-index: -1;
    border-radius: 50%;
    filter: blur(80px);
}

/* Navigation */
.navbar {
    padding: 1.5rem 0;
    background: transparent;
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: -0.5px;
}
.nav-links {
    display: flex;
    gap: 2rem;
}
.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}
.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
}
.theme-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    color: var(--text-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.theme-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--card-shadow);
}

/* Layout Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Hero Section */
.section-hero {
    text-align: center;
    margin: 4rem 0 5rem;
}
.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}
.hero-title span {
    color: var(--primary-color);
}
.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2.5rem;
    margin-bottom: 5rem;
}

/* Glassmorphism Card Design */
.project-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    /* Important for inner components to sit above glass background */
    z-index: 1;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.project-card:hover {
    transform: translateY(-8px);
}

.card-glass-bg {
    position: absolute;
    inset: 0;
    background: var(--card-bg);
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    z-index: -1;
}

/* Card Content Structure */
.card-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.card-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.tag-project { background: var(--tag-project); color: var(--tag-project-text); }
.tag-tutorial { background: var(--tag-tutorial); color: var(--tag-tutorial-text); }
.tag-blog { background: var(--tag-blog); color: var(--tag-blog-text); }
.tag-upcoming { background: var(--tag-upcoming); color: var(--tag-upcoming-text); }

.card-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.card-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    flex-grow: 1;
}

/* Progress Bar Section */
.progress-section {
    margin-bottom: 1.5rem;
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
}
.progress-text { color: var(--text-muted); }
.progress-value { color: var(--text-color); }

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background-color: var(--progress-bg);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--progress-fill);
    border-radius: 4px;
    transition: width 1s ease-in-out;
}
/* Variations of progress */
.fill-complete { background-color: var(--progress-complete); }
.fill-archived { background-color: var(--progress-archived); }
.fill-planning { background-color: var(--progress-planning); }

/* Card Footer (Buttons) */
.card-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    border-top: 1px solid var(--card-border);
    padding-top: 1.5rem;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.8rem;
    background: var(--btn-bg);
    color: var(--text-color);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--card-border);
    transition: all 0.2s ease;
}

.social-btn:hover {
    background: var(--btn-hover);
    transform: translateY(-2px);
}

.social-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.github-btn i { color: var(--text-color); }
.linkedin-btn i { color: #0077b5; }
[data-theme="dark"] .linkedin-btn i { color: #0a66c2; } /* adjust LI color for dark mode slightly */

.read-more-btn {
    margin-left: auto;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: gap 0.2s ease;
}

.read-more-btn:hover {
    gap: 0.5rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* In a real scenario, add a hamburger menu */
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .projects-grid {
        grid-template-columns: 1fr;
    }
}