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

:root {
    /* Dark Mode (Default) */
    --bg-primary: #0f1419;
    --bg-secondary: #161b22;
    --bg-tertiary: #2d3748;
    --text-primary: #e5e7eb;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent: #4f87c8;
    --accent-light: #60a5fa;
    --border: #232a37;
    --card-bg: #161b22;
}

body.light-theme {
    /* Light Mode */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --border: #e2e8f0;
    --card-bg: #f8fafc;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--border);
    background-color: rgba(var(--bg-secondary), 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-info h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.header-title {
    font-size: 14px;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
}

.icon-sun {
    display: none;
    color: #fbbf24;
}

.icon-moon {
    display: block;
    color: #64748b;
}

body.light-theme .icon-sun {
    display: block;
}

body.light-theme .icon-moon {
    display: none;
}

.header-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.header-icon:hover {
    background-color: var(--bg-tertiary);
}

/* Main Content */
main {
    padding: 38px 0;
}

/* Contact Info */
.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 38px;
    margin-bottom: 38px;
}

.contact-item {
    text-decoration: none;
    color: inherit;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.contact-icon {
    color: var(--accent);
    flex-shrink: 0;
}

/* Sections */
.section {
    margin-bottom: 38px;
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.section-text {
    color: var(--text-primary);
    line-height: 1.8;
    text-align: justify;
}

.section-text2 {
    color: #8b949e;
    line-height: 1.8;
    text-align: justify;
}

/* Skills */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;

}

.skill-badge {
    padding: 8px 16px;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.skill-badge:hover {
    background-color: rgba(59, 130, 246, 0.2);
}

/* Projects */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.project-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
    transition: border-color 0.2s ease;
}


.project-card:hover {
    border-color: rgba(59, 130, 246, 0.5);
}

.project-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
}

.project-description {
    font-size: 14px;
    color: #8b949e;
    margin-bottom: 16px;
    line-height: 1.7;
    text-align: justify;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    padding: 4px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

/* Experience */
.experience-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.experience-item {
    border-left: 3px solid var(--accent);
    padding-left: 24px;
    padding-bottom: 24px;
}

.experience-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 8px;
}

@media (min-width: 768px) {
    .experience-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.experience-position {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
}

.experience-period {
    font-size: 13px;
    color: var(--text-primary);
}

.experience-company {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.experience-description {
    font-size: 14px;
    color: #8b949e;
    line-height: 1.7;
    text-align: justify;
}

/* Education */
.education-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.education-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}

.education-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 8px;
}

@media (min-width: 768px) {
    .education-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.education-course {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
}

.education-period {
    font-size: 13px;
    color: var(--text-primary);
}

.education-institution {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.education-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 12px;
    color: var(--accent);
}

/* Certifications */
.certifications-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.certification-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}

.certification-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 8px;
}

@media (min-width: 768px) {
    .certification-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.certification-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
}

.certification-year {
    font-size: 13px;
    color: var(--text-primary);
}

.certification-provider {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.certification-courses {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.certification-courses li {
    font-size: 13px;
    color: #8b949e;
    padding-left: 16px;
    position: relative;
}

.certification-courses li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.fade-in-section {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.fade-in-section.visible {
    animation: fadeInUp 0.8s ease-out forwards;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    background-color: var(--card-bg);
    padding: 32px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 38px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
    }

    .section-title {
        font-size: 18px;
    }

    .project-title,
    .experience-position,
    .education-course,
    .certification-title {
        font-size: 15px;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }
}