:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-light: #ffffff;
    --text-light: #1f2937;
    --bg-dark: #0f172a;
    --text-dark: #f8fafc;
    --accent: #10b981;
    --card-bg-light: #f3f4f6;
    --card-bg-dark: #1e293b;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    line-height: 1.6;
    transition: var(--transition);
}

body.light-mode {
    background-color: var(--bg-light);
    color: var(--text-light);
}

body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

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

.section-padding {
    padding: 6rem 0;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    backdrop-filter: blur(10px);
    background-color: rgba(15, 23, 42, 0.8);
}

body.light-mode header {
    background-color: rgba(255, 255, 255, 0.8);
}

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

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

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

.nav-links a {
    text-decoration: none;
    color: inherit;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-color);
}

#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

#theme-toggle:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

#theme-toggle svg {
    width: 20px;
    height: 20px;
}

.sun { display: none; }
body.light-mode .sun { display: block; }
body.light-mode .moon { display: none; }

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 80px;
    gap: 4rem;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.hero-content h1 span {
    color: var(--primary-color);
    background: linear-gradient(90deg, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.5rem;
    opacity: 0.9;
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
}

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

.btn.primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.4);
}

.btn.secondary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn.secondary:hover {
    background-color: rgba(99, 102, 241, 0.05);
}

.profile-pic {
    width: 350px;
    height: 350px;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 20px 20px 0px var(--primary-color);
    transition: var(--transition);
}

.profile-pic:hover {
    transform: translate(5px, 5px);
    box-shadow: 10px 10px 0px var(--primary-color);
}

/* About Section */
.section-header {
    margin-bottom: 3rem;
    text-align: center;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.underline {
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 0 auto;
    border-radius: 2px;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.skill-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--card-bg-dark);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

body.light-mode .project-card {
    background: var(--card-bg-light);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.project-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    margin-bottom: 0.5rem;
}

.project-info p {
    font-size: 0.95rem;
    opacity: 0.8;
    margin-bottom: 1rem;
}

.tag {
    font-size: 0.8rem;
    font-weight: 600;
    margin-right: 1rem;
    color: var(--accent);
}

/* Contact Section */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    background: var(--card-bg-dark);
    padding: 2.5rem;
    border-radius: 15px;
    margin-top: 2rem;
}

body.light-mode .contact-form {
    background: var(--card-bg-light);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.2);
    color: inherit;
    font-family: inherit;
}

body.light-mode .form-group input, 
body.light-mode .form-group textarea {
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.form-feedback {
    margin-top: 1rem;
    padding: 0.8rem;
    border-radius: 8px;
    text-align: center;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent);
}

.hidden { display: none; }

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

body.light-mode footer {
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.social-links {
    display: flex;
    gap: 2rem;
}

.social-links a {
    text-decoration: none;
    color: inherit;
    font-weight: 500;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    #hero {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: 120px;
        min-height: auto;
        padding-bottom: 4rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-cta {
        justify-content: center;
    }

    .profile-pic {
        width: 250px;
        height: 250px;
    }

    .nav-links {
        display: none; /* Hide for mobile simplicity */
    }
}