:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --sidebar-bg: rgba(15, 23, 42, 0.95);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-hover: #0ea5e9;
    --border-color: rgba(148, 163, 184, 0.1);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s ease;
    --sidebar-width: 300px;
}

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

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

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

::-webkit-scrollbar-thumb {
    background: rgba(56, 189, 248, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(56, 189, 248, 0.4);
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background-image:
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(168, 85, 247, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    height: 100vh;
}

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: var(--glass-border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
    backdrop-filter: blur(20px);
    z-index: 10;
}

.profile-section {
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

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

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

.social-links a:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}

/* Search Bar */
.search-container {
    position: relative;
    margin-bottom: 1.5rem;
}

#search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: var(--glass-border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.9rem;
    transition: var(--transition);
}

#search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* Controls (Vertical Navigation) */
.controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: auto;
    /* Push footer down */
}

.filter-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    text-align: left;
    display: flex;
    align-items: center;
    font-family: var(--font-main);
    font-size: 0.95rem;
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.filter-btn.active {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-color);
}

.btn-icon {
    margin-right: 0.75rem;
    opacity: 0.8;
}

.label {
    flex-grow: 1;
}

.count {
    font-size: 0.75rem;
    opacity: 0.7;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.1rem 0.4rem;
    border-radius: 1rem;
    margin-left: 0.5rem;
}

.filter-btn.active .count {
    background: rgba(56, 189, 248, 0.2);
    color: var(--accent-color);
}

/* Main Content */
.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

/* Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 1600px;
    margin: 0 auto;
}

.project-card {
    background: var(--card-bg);
    border: var(--glass-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--accent-color), #818cf8);
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-color: rgba(56, 189, 248, 0.4);
    background: rgba(30, 41, 59, 0.85);
}

.project-card:hover::before {
    opacity: 1;
}

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

.tech-icon {
    color: var(--accent-color);
    transition: var(--transition);
    background: rgba(56, 189, 248, 0.1);
    padding: 0.75rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-card:hover .tech-icon {
    transform: scale(1.1) rotate(5deg);
    background: rgba(56, 189, 248, 0.2);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.3);
}

.card-links {
    display: flex;
    gap: 0.75rem;
}

.external-link {
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: var(--transition);
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
}

.external-link:hover {
    opacity: 1;
    color: var(--accent-color);
    transform: translateY(-2px);
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.tag {
    font-size: 0.75rem;
    color: var(--accent-color);
    font-family: monospace;
    background: rgba(56, 189, 248, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    border: 1px solid transparent;
    transition: var(--transition);
}

.project-card:hover .tag {
    border-color: rgba(56, 189, 248, 0.3);
    background: rgba(56, 189, 248, 0.15);
}

/* Footer */
footer {
    margin-top: 2rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    opacity: 0.7;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.project-card {
    animation: fadeInUp 0.5s ease-out backwards;
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
        height: auto;
        overflow: visible;
    }

    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: var(--glass-border);
        padding: 1.5rem;
    }

    .content-area {
        overflow: visible;
        padding: 1.5rem;
    }

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