:root {
    --bg-main: #0a0e17;
    --sidebar-bg: #121824;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --text-bright: #f3f4f6;
    --text-muted: #9ca3af;
    --border-color: #1e293b;
    --tag-bg: #1e293b;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-bright);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.portfolio-container {
    display: grid;
    grid-template-columns: 420px 1fr;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.profile-sidebar {
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
    padding: 2.5rem 2.5rem 1.5rem 2.5rem;
    overflow: hidden;
}

.sidebar-scrollable-content {
    flex-grow: 1;
    overflow-y: auto;
    padding-bottom: 1.5rem;
}

.sidebar-fixed-controls {
    flex-shrink: 0;
    background-color: var(--sidebar-bg);
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    width: 100%;
}

.profile-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--text-bright);
    margin-bottom: 0.25rem;
}

.profile-header .subtitle {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    margin-top: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bio-section p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-muted);
}

.stack-section h3, .interactive-controls h3, #contentProjects h3, #contentContact h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    margin-top: 1rem;
}

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

.tag {
    background-color: var(--tag-bg);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.page-content {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: fadeIn 0.2s ease-out forwards;
}

.page-content.hidden {
    display: none !important;
}

.project-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.project-list li {
    background-color: var(--tag-bg);
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 0.9rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-form input, .contact-form textarea {
    width: 100%;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-bright);
    padding: 0.75rem;
    font-family: inherit;
    font-size: 0.9rem;
}

.contact-form textarea {
    height: 100px;
    resize: none;
}

.submit-btn {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
}

.submit-btn:hover {
    background-color: var(--accent-hover);
}

.interactive-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-bottom: 1rem;
}

.nav-btn {
    width: 100%;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-bright);
    padding: 0.8rem 1.2rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all 0.15s ease;
}

.nav-btn:hover {
    background-color: var(--border-color);
}

.nav-btn.active {
    background-color: var(--accent);
    border-color: var(--accent);
}

.sidebar-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

#statusMessage {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#statusMessage::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
}

.display-panel {
    display: block;
    background-color: var(--bg-main);
    padding: 0;
    height: 100vh;
    width: 100%;
    overflow: hidden;
}

.display-panel img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(2px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 850px) {
    .portfolio-container {
        grid-template-columns: 1fr;
        height: auto;
        overflow: visible;
    }
    .profile-sidebar {
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .display-panel {
        height: 450px;
        padding: 0;
    }
}