:root {
    --bg-main: #ffffff;
    --bg-secondary: #fbfbfd;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent: #0066cc;
    --border: #d2d2d7;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'SF Pro Display', 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: #d2d2d7;
    border-radius: 10px;
}

/* Navigation */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 10%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.8);
    border-bottom: 0.5px solid var(--border);
}

.logo {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
}

#nav-logo {
    height: 80px; /* Maximize within padding */
    width: auto;
    display: block;
}

#navbar {
    padding: 0.5rem 10%; /* Reduced padding to fit larger logo without making navbar huge */
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 400;
    opacity: 0.8;
    transition: var(--transition);
}

.nav-links a:hover {
    opacity: 1;
    color: var(--accent);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

.menu-toggle .bar {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--bg-secondary) url('assets/hero-bg.png') center/cover no-repeat;
    padding-top: 80px;
}

.hero-overlay {
    display: none; /* Removed for light mode */
}

.hero-content {
    max-width: 900px;
}

.hero h1 {
    font-size: 5.5rem;
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.6rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: -0.5px;
    margin-bottom: 3rem;
    text-transform: none;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.social-links a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: white;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: 1.1rem;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: #f5f5f7;
    border-color: var(--text-primary);
    transform: scale(1.1);
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.2rem;
    background: var(--text-primary);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1.1rem;
    transition: var(--transition);
}

.cta-button:hover {
    background: #333;
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 120px 10%;
    background-color: var(--bg-main);
}

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

.section-title {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -1.5px;
    margin-bottom: 4rem;
    text-align: center;
}

.section-title span {
    color: var(--accent);
}

.alt-bg {
    background-color: var(--bg-secondary);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

.project-image {
    height: 280px;
    position: relative;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-info {
    padding: 2.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.tags span {
    padding: 0.4rem 1rem;
    background: #f5f5f7;
    color: var(--text-primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.btn-sm {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    background: #f5f5f7;
    color: var(--accent);
    text-decoration: none;
    border-radius: 20px;
    font-weight: 600;
    transition: var(--transition);
    align-self: flex-start;
}

.btn-sm:hover {
    background: var(--accent);
    color: white;
}

/* Certificates */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.cert-card {
    background: white;
    border-radius: 24px;
    padding: 1rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.cert-card:hover {
    transform: translateY(-8px);
}

.cert-card img {
    width: 100%;
    border-radius: 18px;
    margin-bottom: 1.5rem;
}

.cert-info {
    padding: 0 1rem 1.5rem;
}

.cert-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cert-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
footer {
    padding: 100px 10%;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4rem;
}

.footer-info h2 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -1px;
    max-width: 500px;
}

.footer-logo {
    height: 80px;
    width: auto;
    margin-bottom: 1.5rem;
}

.footer-mail {
    font-size: 1.8rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    display: block;
    margin-top: 1rem;
    transition: var(--transition);
}

.footer-mail:hover {
    opacity: 0.7;
}

.copyright-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    margin-top: 3rem;
}

.copyright-logo {
    height: 30px;
    width: auto;
    opacity: 0.4;
    filter: grayscale(1);
    transition: var(--transition);
}

.copyright-logo:hover {
    opacity: 1;
    filter: none;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
    border: none !important;
    padding: 0 !important;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 4rem;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }
    .section-title {
        font-size: 2.5rem;
    }
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 3rem;
    }
    #navbar {
        padding: 1rem 5%;
    }
    .nav-links {
        display: none; /* Initial state */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border);
        text-align: center;
    }
    .nav-links.active {
        display: flex;
    }
    .menu-toggle {
        display: flex;
    }
    .menu-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .menu-toggle.active .bar:nth-child(2) {
        transform: rotate(-45deg) translate(1px, -2px);
    }
}