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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --background: #ffffff;
    --section-bg: #f9fafb;
    --border-color: #e5e7eb;
    --accent: #3b82f6;
    --hover-color: #1d4ed8;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background);
    padding-top: 70px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu li a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-menu li a:not(.btn-resume):hover {
    color: var(--primary-color);
}

.nav-menu li a:not(.btn-resume)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s;
}

.nav-menu li a:not(.btn-resume):hover::after {
    width: 100%;
}

.btn-resume {
    background-color: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    transition: all 0.3s;
}

.btn-resume:hover {
    background-color: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 3px 0;
    transition: all 0.3s;
    border-radius: 3px;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 5rem 0 4rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    animation: fadeInUp 0.8s ease-out;
}

.subtitle {
    font-size: 1.35rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.elevator-pitch {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.header-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--section-bg);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* Main Content */
main {
    padding: 3rem 0;
}

section {
    margin-bottom: 4rem;
    scroll-margin-top: 90px;
}

section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 2rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--primary-color);
    position: relative;
}

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

/* About Section */
#about p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
}

/* Experience Items */
.experience-item,
.project-item,
.certification-item {
    background-color: var(--section-bg);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.experience-item:hover,
.project-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

.project-title-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.project-links {
    display: flex;
    gap: 0.75rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s;
}

.project-link:hover {
    background-color: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

.project-link svg {
    width: 14px;
    height: 14px;
}

.experience-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.date {
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 500;
}

.position {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.location {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.experience-item ul,
.project-item ul {
    list-style: none;
    margin-top: 1rem;
}

.experience-item ul li,
.project-item ul li {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    position: relative;
    color: var(--text-dark);
}

.experience-item ul li::before,
.project-item ul li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Certification Items */
.certification-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.certification-item p {
    color: var(--text-light);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.skill-category {
    background-color: var(--section-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border-top: 3px solid var(--primary-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.skill-category:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.skill-category h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.skill-category p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, var(--section-bg) 0%, white 100%);
    padding: 3rem 2rem;
    border-radius: 12px;
    margin-top: 4rem;
}

.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 3rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.75rem;
    background-color: white;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    transition: all 0.3s;
}

.contact-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.15);
    transform: translateY(-3px);
}

.contact-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--accent));
    border-radius: 10px;
    color: white;
}

.contact-info-text h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.contact-info-text p {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

footer p {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }

    .nav-container {
        padding: 0.75rem 1.5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .container {
        padding: 0 1.5rem;
    }

    header {
        padding: 3rem 0 2.5rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1.15rem;
    }

    .elevator-pitch {
        font-size: 1rem;
    }

    .header-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-primary,
    .btn-secondary {
        text-align: center;
    }

    section h2 {
        font-size: 1.75rem;
    }

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .experience-header h3 {
        font-size: 1.3rem;
    }

    .date {
        margin-top: 0.25rem;
    }

    .project-title-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

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

    .contact-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.75rem;
    }

    .experience-item,
    .project-item,
    .certification-item {
        padding: 1.5rem;
    }

    .contact-section {
        padding: 2rem 1.5rem;
    }
}