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

:root {
    --dark-blue: #0f1419;
    --light-text: #e8eef7;
    --accent: #4a90e2;
    --accent-light: #6ba3f5;
    --card-bg: #1a1f2e;
    --border: #2a3142;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--dark-blue);
    color: var(--light-text);
    line-height: 1.6;
}

/* Header & Navigation */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--dark-blue);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
}

/* Language Toggle Switch */
.lang-toggle-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.lang-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--light-text);
    min-width: 50px;
    text-align: center;
}

.lang-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

.lang-toggle input {
    display: none;
}

.toggle-slider {
    display: inline-block;
    width: 50px;
    height: 28px;
    background-color: #4a5568;
    border-radius: 34px;
    position: relative;
    transition: background-color 0.3s ease;
    border: 2px solid var(--border);
}

.toggle-slider::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    background-color: var(--accent);
    border-radius: 50%;
    top: 1px;
    left: 2px;
    transition: transform 0.3s ease;
}

.lang-toggle input:checked + .toggle-slider {
    background-color: var(--accent);
}

.lang-toggle input:checked + .toggle-slider::after {
    transform: translateX(22px);
    background-color: var(--dark-blue);
}

.lang-toggle:hover .toggle-slider {
    box-shadow: 0 0 8px rgba(74, 144, 226, 0.3);
}

/* Hero Section */
.hero {
    padding: 6rem 5%;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--accent);
    font-weight: 800;
    letter-spacing: -1px;
}

.hero .subtitle {
    font-size: 1.3rem;
    color: #a8b5d1;
    margin-bottom: 1.5rem;
    font-weight: 300;
}

.hero .description {
    font-size: 1.1rem;
    color: var(--light-text);
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* Sections */
section {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

section h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--accent);
    font-weight: 700;
    position: relative;
    padding-bottom: 1rem;
    text-align: center;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent);
}

/* Experience Timeline */
.experience-container {
    display: grid;
    gap: 2rem;
}

.experience-card {
    background: var(--card-bg);
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.experience-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.experience-card h3 {
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.experience-card .timeline {
    color: #7a8199;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.experience-card p {
    color: #c5cfe0;
    line-height: 1.7;
}

.experience-card ul {
    margin-top: 1rem;
    margin-left: 1.5rem;
    color: #a8b5d1;
}

.experience-card li {
    margin-bottom: 0.5rem;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.skill-category h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.skill-tag {
    display: inline-block;
    background: rgba(74, 144, 226, 0.15);
    color: var(--accent-light);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    margin-right: 0.7rem;
    margin-bottom: 0.7rem;
    font-size: 0.9rem;
    border: 1px solid rgba(74, 144, 226, 0.3);
}

/* Education */
.education-list {
    display: grid;
    gap: 1.5rem;
}

.education-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-left: 4px solid var(--accent);
    border-radius: 4px;
}

.education-item h3 {
    color: var(--accent);
    margin-bottom: 0.3rem;
}

.education-item .institution {
    color: #7a8199;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.education-item .year {
    color: #5a6a7a;
    font-size: 0.85rem;
}

/* Platforms */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.platform {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 6px;
    text-align: center;
    border: 1px solid var(--border);
}

.platform h3 {
    color: var(--accent);
    margin-bottom: 0.7rem;
}

.platform p {
    color: #a8b5d1;
    font-size: 0.95rem;
}

/* Focus Areas */
.focus-areas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

/* Projects Section */
.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(74, 144, 226, 0.15);
}

.project-card h3 {
    color: var(--accent);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.project-section {
    margin-bottom: 1.5rem;
}

.project-section-title {
    color: #7a8199;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.project-section-content {
    color: #a8b5d1;
    font-size: 0.95rem;
    line-height: 1.6;
}

.project-stack {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
}

.project-scale {
    color: #b8c5e1;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Focus Areas */
.focus-areas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.focus-item {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.focus-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.focus-item h3 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.focus-item p {
    color: #a8b5d1;
    line-height: 1.6;
}

/* Soft Skills Section */
.softskills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.softskill-item {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.softskill-item:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(74, 144, 226, 0.1);
}

.softskill-item h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
}

.softskill-item p {
    color: #a8b5d1;
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Contact Section */
#contact {
    text-align: center;
    padding: 6rem 5% !important;
}

#contact h2 {
    color: var(--accent);
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
}

#contact > p {
    color: #a8b5d1;
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1.2rem 2rem;
    border-radius: 6px;
    border: 2px solid var(--border);
    background: var(--card-bg);
    color: var(--light-text);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.contact-btn:hover {
    border-color: var(--accent);
    background: rgba(74, 144, 226, 0.1);
    transform: translateY(-2px);
}

.contact-btn-primary {
    border-color: var(--accent);
    background: rgba(74, 144, 226, 0.15);
    color: var(--accent-light);
}

.contact-btn-primary:hover {
    background: rgba(74, 144, 226, 0.25);
}

.contact-icon {
    font-size: 1.5rem;
    display: inline-block;
}

.contact-text {
    display: inline-block;
}

/* Footer */
footer {
    padding: 4rem 5%;
    text-align: center;
    border-top: 1px solid var(--border);
    color: #7a8199;
    margin-top: 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

#footer-tagline {
    font-size: 1.1rem;
    color: var(--light-text);
    margin-bottom: 2rem;
    font-weight: 500;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links a {
    font-size: 1.8rem;
    color: var(--light-text);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(74, 144, 226, 0.1);
}

.footer-links a:hover {
    background: rgba(74, 144, 226, 0.2);
    color: var(--accent-light);
    transform: translateY(-3px);
}

.footer-icon {
    display: block;
}

/* Footer */
footer {
    padding: 3rem 5%;
    text-align: center;
    border-top: 1px solid var(--border);
    color: #7a8199;
    margin-top: 4rem;
}

footer a {
    color: var(--accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .contact-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .contact-btn {
        justify-content: center;
    }

    .footer-links {
        gap: 1rem;
    }

    .footer-links a {
        width: 45px;
        height: 45px;
        font-size: 1.5rem;
    }

    #contact {
        padding: 4rem 5% !important;
    }

    #contact h2 {
        font-size: 2rem;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .hero .subtitle {
        font-size: 1.1rem;
    }

    section h2 {
        font-size: 2rem;
    }

    header {
        flex-direction: column;
        gap: 1rem;
    }

    .lang-toggle {
        width: 100%;
    }
}

/* Highlight */
.highlight {
    color: var(--accent);
    font-weight: 600;
}