/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #0a192f;      /* Ciemnogranatowy */
    --accent-color: #64ffda;       /* Turkus */
    --text-light: #ccd6f6;        /* Jasnoszary */
    --text-white: #e6f1ff;        /* Biały */
    --text-dark: #8892b0;         /* Ciemniejszy szary */
    --background-light: #112240;   /* Jasniejszy od primary */
    --shadow: rgba(10, 25, 47, 0.7);
    
    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border radius */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
}
/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    font-size: 16px;
}
body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    background-color: var(--primary-color);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}
/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-white);
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.4rem); }
p {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}
a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--text-white);
}
/* ===== UTILITY CLASSES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    border-radius: 2px;
}
/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 12px 24px;
    border: 2px solid var(--accent-color);
    background: transparent;
    color: var(--accent-color);
    font-family: var(--font-family);
    font-weight: var(--font-weight-medium);
    font-size: 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}
.btn:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(100, 255, 218, 0.4);
}
.btn-primary {
    background-color: var(--accent-color);
    color: var(--primary-color);
}
.btn-primary:hover {
    background-color: transparent;
    color: var(--accent-color);
}
.btn-outline {
    border: 2px solid var(--text-light);
    color: var(--text-light);
}
.btn-outline:hover {
    background-color: var(--text-light);
    color: var(--primary-color);
}
/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(10, 25, 47, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}
.header.scrolled {
    background-color: rgba(10, 25, 47, 0.95);
    box-shadow: 0 2px 20px var(--shadow);
}
.navbar {
    padding: var(--spacing-sm) 0;
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-white);
    text-decoration: none;
}
.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}
.nav-link {
    color: var(--text-light);
    font-weight: var(--font-weight-medium);
    position: relative;
    transition: var(--transition);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}
.nav-link:hover,
.nav-link.active {
    color: var(--accent-color);
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}
/* ===== HAMBURGER MENU ===== */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}
.hamburger-line {
    width: 25px;
    height: 3px;
    background-color: var(--text-light);
    transition: var(--transition);
    border-radius: 2px;
}
.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}
.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}
/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--background-light) 100%);
    z-index: -1;
}
.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 25% 25%, var(--accent-color) 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, var(--accent-color) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.1;
    animation: float 20s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}
.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    text-align: center;
}
.hero-content {
    animation: fadeInUp 1s ease-out;
}
.hero-greeting {
    display: block;
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--accent-color);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-xs);
}
.hero-name {
    display: block;
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--text-white), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--text-dark);
    margin: var(--spacing-md) 0 var(--spacing-xl) 0;
}
.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 15px 30px;
    background-color: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    font-size: 1.1rem;
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius);
    transition: var(--transition);
    animation: pulse 2s infinite;
}
.hero-cta:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(100, 255, 218, 0.4);
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(100, 255, 218, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(100, 255, 218, 0); }
    100% { box-shadow: 0 0 0 0 rgba(100, 255, 218, 0); }
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* ===== ABOUT SECTION ===== */
.about {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-light);
}
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: center;
}
.about-image {
    text-align: center;
}
.profile-img {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent-color);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.2);
    transition: var(--transition);
}
.profile-img:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(100, 255, 218, 0.3);
}
.about-text {
    font-size: 1.1rem;
}
.about-description {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}
/* ===== SKILLS SECTION ===== */
.skills {
    padding: var(--spacing-xxl) 0;
}
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}
.skills-category {
    background-color: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: var(--transition);
}
.skills-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.1);
}
.category-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--accent-color);
}
.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}
.skill-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    transition: var(--transition);
}
.skill-item:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateX(5px);
}
.skill-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    width: 24px;
    text-align: center;
}
.skill-item span {
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
}
/* ===== PORTFOLIO SECTION ===== */
.portfolio {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-light);
}
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}
.project-card {
    background-color: var(--primary-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: var(--transition);
}
.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(100, 255, 218, 0.15);
}
.project-image {
    position: relative;
    overflow: hidden;
    height: 200px;
}
.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 25, 47, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}
.project-card:hover .project-overlay {
    opacity: 1;
}
.project-card:hover .project-image img {
    transform: scale(1.1);
}
.project-links {
    display: flex;
    gap: var(--spacing-sm);
}
.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 10px 20px;
    background-color: var(--accent-color);
    color: var(--primary-color);
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    transition: var(--transition);
}
.project-link:hover {
    background-color: var(--text-white);
    transform: translateY(-2px);
}
.project-content {
    padding: var(--spacing-lg);
}
.project-title {
    margin-bottom: var(--spacing-xs);
    color: var(--text-white);
}
.project-description {
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
    line-height: 1.6;
}
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}
.tech-tag {
    padding: 4px 12px;
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--accent-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
    border: 1px solid rgba(100, 255, 218, 0.3);
}
/* ===== CONTACT SECTION ===== */
.contact {
    padding: var(--spacing-xxl) 0;
}
.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
    color: var(--text-light);
}
.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}
.contact-form-container {
    background-color: var(--background-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(100, 255, 218, 0.1);
}
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}
.form-group label {
    color: var(--text-white);
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
}
.form-group input,
.form-group textarea {
    padding: 12px 16px;
    background-color: var(--primary-color);
    border: 2px solid rgba(100, 255, 218, 0.2);
    border-radius: var(--border-radius);
    color: var(--text-light);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(100, 255, 218, 0.1);
}
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}
.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--background-light);
    border-radius: var(--border-radius);
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: var(--transition);
}
.contact-item:hover {
    transform: translateX(5px);
    background-color: rgba(100, 255, 218, 0.05);
}
.contact-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-top: 2px;
}
.contact-item h4 {
    margin-bottom: 4px;
    font-size: 1rem;
}
.contact-item a {
    color: var(--text-light);
    font-size: 0.95rem;
}
.contact-item a:hover {
    color: var(--accent-color);
}
/* ===== FOOTER ===== */
.footer {
    background-color: var(--background-light);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(100, 255, 218, 0.1);
}
.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-text {
    color: var(--text-dark);
    margin: 0;
}
.footer-social {
    display: flex;
    gap: var(--spacing-md);
}
.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--accent-color);
    border-radius: 50%;
    transition: var(--transition);
}
.social-link:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-3px);
}
/* ===== RESPONSIVE DESIGN ===== */
/* Mobile First - 320px and up */
@media (max-width: 767px) {
    :root {
        --spacing-xs: 0.375rem;
        --spacing-sm: 0.75rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 3rem;
    }
    
    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: rgba(10, 25, 47, 0.98);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-xl);
        gap: var(--spacing-xl);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    /* Hero */
    .hero {
        height: calc(100vh - 70px);
        margin-top: 70px;
    }
    
    .hero-cta {
        padding: 12px 24px;
        font-size: 1rem;
    }
    
    /* About */
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .profile-img {
        width: 200px;
        height: 200px;
    }
    
    /* Skills */
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .skills-list {
        grid-template-columns: 1fr;
    }
    
    /* Portfolio */
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .project-links {
        flex-direction: column;
    }
    
    /* Contact */
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Footer */
    .footer .container {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}
/* Tablet - 768px and up */
@media (min-width: 768px) and (max-width: 1023px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr 1.5fr;
    }
}
/* Desktop - 1024px and up */
@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .hero-container {
        padding: 0 var(--spacing-lg);
    }
    
    .nav-container {
        padding: 0 var(--spacing-lg);
    }
}
/* ===== SCROLL ANIMATIONS ===== */
@media (prefers-reduced-motion: no-preference) {
    .section-title,
    .about-content,
    .skills-category,
    .project-card,
    .contact-form-container,
    .contact-info {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }
    
    .section-title.animate,
    .about-content.animate,
    .skills-category.animate,
    .project-card.animate,
    .contact-form-container.animate,
    .contact-info.animate {
        opacity: 1;
        transform: translateY(0);
    }
}
/* ===== LOADING STATES ===== */
.loading {
    position: relative;
    pointer-events: none;
}
.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}
/* Focus styles for accessibility */
button:focus,
input:focus,
textarea:focus,
a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}
/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --text-light: #ffffff;
        --text-dark: #cccccc;
        --background-light: #000000;
    }
}
/* Print styles */
@media print {
    .header,
    .footer,
    .hero-cta,
    .contact-form,
    .hamburger {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        height: auto;
        margin-top: 0;
    }
}