/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #48bb78;
    --text-dark: #2d3748;
    --text-light: #718096;
    --text-lighter: #a0aec0;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1), 0 6px 10px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-bg: rgba(255, 255, 255, 0.95);
    --nav-bg-strong: rgba(255, 255, 255, 0.98);
    --hero-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --hero-text: #ffffff;
    --hero-accent: rgba(255, 255, 255, 0.1);
    --hero-accent-strong: rgba(255, 255, 255, 0.2);
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --theme-toggle-bg: rgba(255, 255, 255, 0.92);
    --theme-toggle-text: #2d3748;
    --theme-toggle-border: #d7dfeb;
}

html[data-theme="dark"] {
    --primary-color: #8fa3ff;
    --primary-dark: #7085ef;
    --secondary-color: #4fd1c5;
    --text-dark: #edf2ff;
    --text-light: #a8b4cb;
    --text-lighter: #7f8aa3;
    --bg-light: #101828;
    --bg-white: #0b1220;
    --border-color: #22314d;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.28);
    --shadow-md: 0 10px 22px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 14px 34px rgba(0, 0, 0, 0.32);
    --shadow-xl: 0 22px 48px rgba(0, 0, 0, 0.42);
    --nav-bg: rgba(11, 18, 32, 0.9);
    --nav-bg-strong: rgba(11, 18, 32, 0.96);
    --hero-gradient: linear-gradient(135deg, #0f172a 0%, #172554 48%, #0f766e 100%);
    --hero-text: #f8fbff;
    --hero-accent: rgba(148, 163, 184, 0.12);
    --hero-accent-strong: rgba(148, 163, 184, 0.2);
    --card-bg: #0f1b2d;
    --input-bg: #111f34;
    --theme-toggle-bg: rgba(15, 23, 42, 0.66);
    --theme-toggle-text: #f8fbff;
    --theme-toggle-border: rgba(148, 163, 184, 0.28);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.navbar.scrolled {
    background: var(--nav-bg-strong);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-logo .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--theme-toggle-border);
    background: var(--theme-toggle-bg);
    color: var(--theme-toggle-text);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    background: var(--bg-light);
}

.theme-toggle-label {
    font-size: 0.9rem;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: var(--hero-gradient);
    color: var(--hero-text);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="10" cy="50" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="90" cy="30" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.greeting {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.name {
    display: block;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    text-align: center;
}

.btn-primary {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

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

.btn-secondary:hover {
    background: var(--hero-text);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--hero-accent);
    color: var(--hero-text);
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--hero-accent-strong);
    transform: translateY(-2px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out;
}

.profile-image {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--hero-accent-strong);
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
    background: var(--hero-accent);
}

.profile-headshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.profile-placeholder {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: var(--hero-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--hero-text);
    border: 4px solid var(--hero-accent-strong);
    animation: float 3s ease-in-out infinite;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border-right: 3px solid var(--hero-text);
    border-bottom: 3px solid var(--hero-text);
    transform: rotate(45deg);
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-lighter);
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.highlight-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.highlight-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.highlight-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.highlight-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.highlight-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder {
    font-size: 3rem;
    color: white;
    opacity: 0.8;
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.project-description {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: var(--bg-light);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--primary-dark);
    transform: translateX(3px);
}

/* Skills Section */
.skills {
    background: var(--bg-light);
}

.skills-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.skills-category h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.skill-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.skill-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.skill-name {
    font-weight: 500;
    color: var(--text-dark);
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.contact-info p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.contact-details {
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-icon {
    color: var(--primary-color);
    font-size: 1.2rem;
    width: 20px;
}

.contact-social {
    display: flex;
    gap: 1rem;
}

.social-link-large {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--hero-text);
    text-decoration: none;
    transition: var(--transition);
}

.social-link-large:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.contact-form {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--input-bg);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

.footer-content p {
    margin-bottom: 0.5rem;
}

.footer-content i {
    color: var(--secondary-color);
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--nav-bg-strong);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-actions {
        gap: 0.75rem;
    }

    .theme-toggle {
        padding: 0.65rem 0.85rem;
    }

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

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

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

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

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        justify-content: space-around;
    }

    .about-highlights {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .highlight-card {
        flex: 1 1 250px;
    }

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

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .hero-container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 200px;
    }

    .theme-toggle-label {
        display: none;
    }

    .about-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Enterprise Experience Section */
.subsection-title {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    margin: 4rem 0 2rem;
    color: var(--text-light);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.experience-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
}

.experience-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.experience-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.experience-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.experience-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}