/* CSS Variables */
:root {
    --primary-color: #1d1d1f;
    --primary-dark: #000000;
    --primary-light: #424245;
    --secondary-color: #86868b;
    --accent-color: #0071e3;
    --accent-hover: #0077ed;
    --background-color: #ffffff;
    --surface-color: #f5f5f7;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-light: #86868b;
    --border-color: #d2d2d7;
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.18);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
    --border-radius: 0.75rem;
    --border-radius-lg: 1.25rem;
    --transition: all 0.4s cubic-bezier(0.28, 0.11, 0.32, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.47059;
    color: var(--text-primary);
    background-color: var(--background-color);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.8rem; }
h4 { font-size: 1.4rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 4rem;
    height: 3px;
    background: var(--accent-color);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 980px;
    text-decoration: none;
    font-weight: 400;
    font-size: 1.0625rem;
    text-align: center;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.btn-secondary:hover {
    background: var(--accent-color);
    color: white;
    transform: scale(1.02);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.nav-logo a {
    font-size: 1.3125rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 400;
    font-size: 0.875rem;
    transition: var(--transition);
    position: relative;
    opacity: 0.88;
}

.nav-link:hover {
    color: var(--text-primary);
    opacity: 1;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text-primary);
    transition: var(--transition);
}

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

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

.bar {
    width: 1.5rem;
    height: 2px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f5f7 0%, #e8e8ed 100%);
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(0, 113, 227, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(175, 82, 222, 0.06) 0%, transparent 50%);
    z-index: 1;
}

.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: 2;
}

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

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.typing-animation {
    position: relative;
    background: linear-gradient(135deg, var(--text-primary), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.typing-animation::after {
    content: '|';
    animation: blink 1s infinite;
    -webkit-text-fill-color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 600px;
}

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

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.floating-cards {
    position: relative;
    width: 300px;
    height: 300px;
}

.tech-card {
    position: absolute;
    padding: 0.875rem 1.25rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9375rem;
    box-shadow: var(--shadow-md);
    animation: float 3s ease-in-out infinite;
    animation-delay: var(--delay);
}

.tech-card:nth-child(1) { top: 0; left: 0; }
.tech-card:nth-child(2) { top: 0; right: 0; }
.tech-card:nth-child(3) { bottom: 0; left: 0; }
.tech-card:nth-child(4) { bottom: 0; right: 0; }
.tech-card:nth-child(5) { top: 50%; left: -20px; transform: translateY(-50%); }
.tech-card:nth-child(6) { top: 50%; right: -20px; transform: translateY(-50%); }

/* About Section */
.about {
    padding: 6rem 0;
    background: var(--background-color);
}

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

.about-intro {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 400;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.highlight-item {
    padding: 1.75rem;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.highlight-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.highlight-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 300px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    font-weight: 500;
    box-shadow: var(--shadow-xl);
}

.profile-photo {
    width: 300px;
    height: 400px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    object-fit: cover;
    object-position: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.profile-photo:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* Projects Section */
.projects {
    padding: 6rem 0;
    background: var(--surface-color);
}

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

.project-card {
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--glass-border);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--accent-color), #5e5ce6);
    position: relative;
    overflow: hidden;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

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

.project-link {
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 980px;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition);
}

.project-link:hover {
    background: white;
    transform: scale(1.05);
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-description {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

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

.tech-tag {
    padding: 0.375rem 0.875rem;
    background: rgba(0, 113, 227, 0.08);
    color: var(--accent-color);
    border-radius: 980px;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid rgba(0, 113, 227, 0.12);
}

/* Skills Section */
.skills {
    padding: 6rem 0;
    background: var(--background-color);
}

.skills-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.skills-category h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.75rem;
    letter-spacing: -0.02em;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.skill-bar {
    height: 0.5rem;
    background: var(--border-color);
    border-radius: 0.25rem;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #5e5ce6);
    width: var(--width);
    border-radius: 0.25rem;
    transition: width 1s cubic-bezier(0.28, 0.11, 0.32, 1);
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: var(--surface-color);
}

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

.contact-info h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-methods {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.contact-method:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.contact-method a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

.contact-method a:hover {
    opacity: 0.8;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group textarea {
    padding: 1rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--background-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

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

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--surface-color);
    padding: 2.5rem 0;
    text-align: center;
}

.footer p {
    color: var(--text-light);
    font-size: 0.875rem;
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 4rem;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }

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

    .nav-toggle {
        display: flex;
    }

    .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;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-photo {
        width: 250px;
        height: 300px;
    }

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

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

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

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
}

@media (max-width: 480px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }

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

    .floating-cards {
        width: 250px;
        height: 250px;
    }

    .tech-card {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
}