:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success: #10b981;
    --warning: #f59e0b;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --border: #475569;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.4);
    --gradient: linear-gradient(135deg, #4338ca 0%, #7c3aed 100%);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
    min-height: 100vh;
    overflow-x: hidden;
}

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--bg-primary);
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.shape {
    position: absolute;
    background: var(--gradient);
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.shape:nth-child(1) {
    width: 80px;
    height: 80px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape:nth-child(2) {
    width: 120px;
    height: 120px;
    top: 70%;
    right: 10%;
    animation-delay: 2s;
}

.shape:nth-child(3) {
    width: 60px;
    height: 60px;
    top: 40%;
    right: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
}

.portfolio-card {
    background: var(--bg-card);
    border-radius: 24px;
    padding: 3rem;
    max-width: 600px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.portfolio-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
}

.theme-toggle {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow);
}

.theme-toggle i {
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.language-selector {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.5rem;
    display: flex;
    gap: 0.25rem;
    z-index: 10;
}

.lang-btn {
    background: transparent;
    border: none;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    font-weight: 500;
}

.lang-btn.active,
.lang-btn:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-1px);
}

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

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    border: 4px solid var(--accent);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.3s ease;
}

.name {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.about-section,
.skills-section,
.projects-section,
.certifications-section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.about-text {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.skill-item {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    transition: all 0.3s ease;
}

.skill-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.skill-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.skill-name {
    font-weight: 600;
    color: var(--text-primary);
}

.projects-grid {
    display: grid;
    gap: 1rem;
}

.project-item {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.project-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.project-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.tag {
    background: var(--gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.certifications-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cert-item {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.cert-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.cert-icon {
    font-size: 1.5rem;
    color: var(--success);
}

.cert-info h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cert-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.education-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.education-item {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all 0.3s ease;
}

.education-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.education-icon {
    font-size: 1.5rem;
    color: var(--accent);
    margin-top: 0.25rem;
}

.education-info h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 1.1rem;
}

.education-school {
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.education-period {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    font-style: italic;
}

.education-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.social-link {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.social-link:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.social-link.linkedin:hover {
    background: #0077b5;
    color: white;
    border-color: #0077b5;
}

.social-link.twitter:hover {
    background: #1da1f2;
    color: white;
    border-color: #1da1f2;
}

.social-link.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
    border-color: transparent;
}

.social-link.github:hover {
    background: #333;
    color: white;
    border-color: #333;
}

.cv-button {
    width: 100%;
    background: var(--gradient);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cv-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: all 0.6s ease;
}

.cv-button:hover::before {
    left: 100%;
}

.cv-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: all 0.3s ease;
}

.modal.show {
    opacity: 1;
}

.modal-content {
    background: var(--bg-card);
    margin: 2% auto;
    padding: 2rem;
    border-radius: 16px;
    max-width: 800px;
    max-height: 90%;
    position: relative;
    transform: scale(0.7);
    transition: all 0.3s ease;
    overflow-y: auto;
}

.modal.show .modal-content {
    transform: scale(1);
}

.close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    color: var(--text-secondary);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    z-index: 10;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.cv-content {
    margin-top: 2rem;
}

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

.cv-section h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
}

.cv-item {
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid var(--border);
}

.cv-item h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cv-item .date {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.cv-item p {
    color: var(--text-secondary);
    line-height: 1.5;
}

.tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--text-primary);
}

.social-link:hover .tooltip {
    opacity: 1;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .portfolio-card {
        padding: 2rem;
        margin: 1rem;
    }

    .name {
        font-size: 2rem;
    }

    .social-links {
        gap: 0.75rem;
    }

    .social-link {
        width: 45px;
        height: 45px;
    }

    .theme-toggle,
    .language-selector {
        position: fixed;
        top: 1rem;
    }

    .theme-toggle {
        right: 1rem;
    }

    .language-selector {
        left: 1rem;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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