:root {
    --bg-color: #050505;
    --text-primary: #eaeaea;
    --text-secondary: #999999;
    --accent: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow-x: hidden;
    scroll-behavior: smooth;
    line-height: 1.5;
}

.filters {
    position: absolute;
    width: 0;
    height: 0;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem;
    background: rgba(5, 5, 5, 0.6);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
}

.logo-img {
    height: 55px;
    width: auto;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.15));
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s ease;
}

.logo:hover .logo-img {
    transform: scale(1.04);
    filter: drop-shadow(0 0 14px rgba(255, 255, 255, 0.28));
}

.nav-links {
    display: none;
    gap: 1rem;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    transition: all 0.2s ease;
}

.nav-links a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.nav-cta-wrapper {
    filter: url(#gooey-filter);
}

.nav-cta {
    background: #fff;
    color: #000;
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    transition: background 0.3s ease;
}

.nav-cta:hover {
    background: rgba(255, 255, 255, 0.8);
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
    .navbar {
        padding: 1.5rem 2rem;
    }
}

/* Background Animation */
.bg-container {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    overflow: hidden;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    mix-blend-mode: screen;
}

.glow-1 {
    width: 40vw; height: 40vw;
    background: rgba(255, 255, 255, 0.05);
    top: 10%; left: 20%;
    animation: float1 20s infinite linear;
}

.glow-2 {
    width: 35vw; height: 35vw;
    background: rgba(255, 255, 255, 0.05);
    top: 40%; right: 10%;
    animation: float2 25s infinite linear;
}

.glow-3 {
    width: 50vw; height: 50vw;
    background: rgba(255, 255, 255, 0.03);
    bottom: -10%; left: 40%;
    animation: float3 30s infinite linear;
}

.noise {
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    pointer-events: none;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(100px, 50px) scale(1.2); }
    50% { transform: translate(0, 100px) scale(1); }
    75% { transform: translate(-100px, 50px) scale(1.1); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(-150px, 100px) scale(1.5); }
    50% { transform: translate(0, 50px) scale(1); }
    75% { transform: translate(100px, -50px) scale(1.2); }
}

@keyframes float3 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(50px, -100px); }
    66% { transform: translate(-50px, 100px); }
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4rem 0;
}

/* Optymalizacja wydajności: Pomijanie renderowania sekcji poza ekranem (off-screen rendering) */
section:not(#hero) {
    content-visibility: auto;
    contain-intrinsic-size: auto 100dvh;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 3rem;
        text-align: left;
        margin-bottom: 3rem;
    }
}

/* Hero */
.hero {
    align-items: center;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin-top: 4rem;
}

.hero h1 {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.1;
    text-shadow: 0 0 20px rgba(255,255,255,0.3);
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.btn-primary {
    display: inline-block;
    width: 100%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    color: #fff;
    padding: 1rem 2rem;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: #fff;
    color: #000;
}

@media (min-width: 768px) {
    .hero h1 { font-size: 4.5rem; }
    .hero p { font-size: 1.25rem; }
    .btn-primary { width: auto; }
}

/* Portfolio */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.card {
    position: relative;
    aspect-ratio: 1;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.card:hover {
    transform: scale(0.98);
}

.card-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom right, #1a1a1a, #050505);
    transition: all 0.5s ease;
}

.card:hover .card-bg {
    filter: brightness(1.5) contrast(1.2);
    transform: scale(1.1);
}

.card-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    z-index: 10;
}

.card p {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    transition: opacity 0.3s, transform 0.3s;
    transform: translateY(10px);
    opacity: 0.7;
}

.card:hover p {
    transform: translateY(0);
    opacity: 1;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    transition: transform 0.3s;
    transform: translateY(5px);
}

.card:hover h3 {
    transform: translateY(0);
}

.card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    line-height: 1.4;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.3s, transform 0.3s;
}

.card:hover .card-desc {
    opacity: 0.9;
    transform: translateY(0);
}

@media (min-width: 768px) {
    .grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
    .card { aspect-ratio: 3/4; }
    .card p { font-size: 0.875rem; }
    .card h3 { font-size: 1.5rem; }
    .card-content { padding: 2rem; }
}

@media (min-width: 1024px) {
    .grid { grid-template-columns: repeat(3, 1fr); gap: 3rem; align-items: stretch; }
    .card { aspect-ratio: unset; height: 75vh; min-height: 600px; border-radius: 2rem; }
    .card-content { padding: 3rem; }
    .card h3 { font-size: 2.5rem; }
    .card p { font-size: 1.25rem; }
    .card-desc { font-size: 1.125rem; }
    
    /* Make the portfolio container span almost full screen */
    .portfolio .container { max-width: 1800px; padding: 0 4rem; width: 100%; }
}

/* Tech Stack */
.flex-row {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.tech-stack {
    background-color: #0a0a0a;
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.tech-info, .tech-visual {
    flex: 1;
    width: 100%;
}

.tech-desc {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    text-align: center;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 1rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
}

.feature-item.active {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
}

.feature-item:hover:not(.active) {
    background: rgba(255,255,255,0.05);
}

.feature-icon {
    color: #555;
}

.feature-item.active .feature-icon {
    color: #fff;
}

.feature-title {
    font-size: 1rem;
    font-weight: 500;
    color: #777;
}

.feature-item.active .feature-title {
    color: #fff;
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    border-radius: 1.5rem;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.panel-glow {
    position: absolute;
    top: 0; right: 0;
    width: 200px; height: 200px;
    background: rgba(255,255,255,0.05);
    filter: blur(60px);
    border-radius: 50%;
}

.panel-section {
    position: relative;
    z-index: 10;
    margin-bottom: 1.5rem;
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
    margin-bottom: 1.5rem;
}

.panel-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #666;
    margin-bottom: 0.5rem;
}

.panel-value {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.125rem;
}

.panel-value.custom { color: #fff; }
.panel-value.wp { color: #888; font-weight: 400; font-size: 1rem; }
.icon-check { color: #4ade80; }
.icon-x { color: #f87171; opacity: 0.7; }

@media (min-width: 768px) {
    .flex-row { flex-direction: row; gap: 4rem; align-items: center; }
    .tech-stack { border-radius: 3rem; margin: 4rem auto; border: 1px solid var(--glass-border); }
    .tech-desc { font-size: 1.125rem; text-align: left; }
    .feature-item { padding: 1.5rem; }
    .feature-title { font-size: 1.25rem; }
    .glass-panel { padding: 2.5rem; border-radius: 2rem; }
    .panel-value { font-size: 1.5rem; }
    .panel-value.wp { font-size: 1.25rem; }
}

/* About */
.about {
    position: relative;
}

.about-panel {
    max-width: 800px;
    margin: 0 auto;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid var(--glass-border);
}

.about-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 1rem;
}

.about-title {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    color: #fff;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.about-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.about-highlight {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.highlight-icon {
    width: 20px;
    height: 20px;
    color: #fff;
    opacity: 0.9;
}

@media (min-width: 768px) {
    .about-panel {
        padding: 4rem;
        border-radius: 2rem;
    }
    
    .about-title {
        font-size: 2.5rem;
    }
    
    .about-text {
        font-size: 1.125rem;
    }
    
    .about-highlights {
        flex-direction: row;
        justify-content: space-around;
        gap: 1rem;
    }
    
    .about-highlight {
        flex-direction: column;
        text-align: center;
        max-width: 220px;
    }
    
    .highlight-icon {
        width: 28px;
        height: 28px;
        margin-bottom: 0.5rem;
    }
}

/* Configurator */
.configurator {
    position: relative;
}

.config-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #555;
    margin-bottom: 2rem;
}

.config-panel {
    min-height: 350px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-bottom: 4rem;
}

.config-content {
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.config-content.hidden-anim {
    opacity: 0;
    transform: translateY(15px);
}

.config-question {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1.5rem;
}

.config-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.config-btn {
    width: 100%;
    text-align: left;
    padding: 1rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: #ccc;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
}

.config-btn:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.3);
}

.config-inputs {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.config-input {
    width: 100%;
    padding: 1rem;
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    font-size: 1.125rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s;
}

.config-input::placeholder { color: rgba(255,255,255,0.3); }
.config-input:focus { border-bottom-color: #fff; }

.btn-submit {
    margin-top: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: #fff;
    padding: 1rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.btn-submit:hover {
    background: #fff;
    color: #000;
}

.btn-back {
    position: absolute;
    bottom: 1rem;
    left: 1.5rem;
    background: none;
    border: none;
    color: #666;
    font-size: 0.875rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s;
    font-family: inherit;
}

.btn-back:hover { color: #fff; }
.btn-back.hidden { display: none; }

@media (min-width: 768px) {
    .config-header { font-size: 0.875rem; margin-bottom: 3rem; }
    .config-panel { min-height: 400px; padding: 4rem; }
    .config-question { font-size: 3rem; margin-bottom: 2.5rem; }
    .config-options { gap: 1rem; }
    .config-btn { padding: 1.5rem; font-size: 1.25rem; border-radius: 0.75rem; }
    .config-inputs { gap: 1.5rem; }
    .config-input { padding: 1.5rem; font-size: 1.5rem; }
    .btn-submit { margin-top: 2rem; padding: 1.25rem; font-size: 1.25rem; }
    .btn-back { bottom: 2rem; left: 2rem; font-size: 1rem; }
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.tech-visual { perspective: 1000px; }
.anim-active { animation: popIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards; }

@keyframes popIn {
    0% { opacity: 0; transform: translateY(20px) rotateX(20deg); }
    100% { opacity: 1; transform: translateY(0) rotateX(0deg); }
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.5s; }

@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}