:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #0C0C0C;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #666666;
    --border-color: #1a1a1a;
    --border-light: #2a2a2a;
    --accent-color: #ffffff;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    font-weight: 300;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Hero Section */
.hero {
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.hero-content {
    position: relative;
}

.profile-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

.profile-image-container {
    position: relative;
    width: 160px;
    height: 160px;
}

.profile-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.profile-image:hover {
    border-color: var(--border-light);
    transform: scale(1.02);
}

.profile-status {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
    background-color: #10B981;
    border-radius: 50%;
    border: 3px solid var(--bg-primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.profile-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.profile-name {
    font-size: 3.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.profile-title {
    font-size: 1.125rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.8;
    letter-spacing: 0.05em;
}

/* Category Sections */
.category-section {
    margin-bottom: 100px;
    position: relative;
}

.category-section:last-child {
    margin-bottom: 60px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 48px;
    position: relative;
}

.category-title {
    font-size: 2.25rem;
    font-weight: 500;
    color: var(--text-primary);
    opacity: 0.9;
    letter-spacing: -0.01em;
}

.category-line {
    flex-grow: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-color), transparent);
    opacity: 0.3;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
    margin-bottom: 20px;
}

.project-card {
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--text-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius) var(--radius) 0 0;
}

.project-card:hover {
    border-color: var(--border-light);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.project-category {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    opacity: 0.7;
}

.project-date {
    font-size: 0.75rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.5;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--text-primary);
    opacity: 0.9;
    line-height: 1.3;
}

.project-description {
    font-size: 0.9375rem;
    font-weight: 300;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
    opacity: 0.8;
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.view-project {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-primary);
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    opacity: 0.8;
}

.view-project:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    opacity: 1;
    transform: translateX(4px);
}

.project-id {
    font-size: 0.75rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.5;
    letter-spacing: 0.05em;
}

/* Loading States */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.7;
    letter-spacing: 0.1em;
}

.no-projects {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.no-projects i {
    font-size: 2rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
    opacity: 0.5;
}

.no-projects p {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.7;
}

/* Footer */
.footer {
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.footer-main {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.footer-text {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.7;
    letter-spacing: 0.05em;
}

.footer-line {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--border-color), transparent);
    opacity: 0.3;
}

.social-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    transition: var(--transition);
    opacity: 0.7;
    padding: 8px 16px;
    border: 1px solid transparent;
    border-radius: var(--radius);
}

.social-link:hover {
    color: var(--text-primary);
    opacity: 1;
    border-color: var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    transform: translateY(-2px);
}

.social-link i {
    font-size: 1rem;
}

.footer-note {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.footer-note p {
    font-size: 0.75rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.5;
    letter-spacing: 0.1em;
}

/* Error States */
.error-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.error-message i {
    font-size: 2rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
    opacity: 0.5;
}

.error-message p {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--text-tertiary);
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        padding: 80px 0 60px;
    }

    .profile-name {
        font-size: 2.5rem;
    }

    .profile-title {
        font-size: 1rem;
    }

    .profile-image-container {
        width: 120px;
        height: 120px;
    }

    .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .category-title {
        font-size: 1.75rem;
    }

    .category-line {
        width: 100%;
        background: linear-gradient(90deg, var(--border-color), transparent);
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .project-card {
        padding: 24px;
    }

    .social-links {
        flex-direction: column;
        gap: 12px;
    }

    .social-link {
        justify-content: center;
    }
}

/* Smooth hover effects */
@media (hover: hover) {
    .project-card {
        transition: var(--transition);
    }
    
    .view-project {
        transition: var(--transition);
    }
    
    .social-link {
        transition: var(--transition);
    }
}