:root {
    --bg-color: #f2f5f9;
    --surface-color: rgba(255, 255, 255, 0.45);
    --surface-alt: rgba(255, 255, 255, 0.65);
    --border-color: rgba(255, 255, 255, 0.85);
    --text-main: #0b1120;
    --text-muted: #475569;
    
    --accent-color: #10b981;
    --accent-hover: #059669;
    --accent-glow: rgba(16, 185, 129, 0.35);
    --card-hover-bg: rgba(255, 255, 255, 0.8);
    
    --c-emerald: #10b981;
    --c-red: #b91010;
    --c-blue: #0ea5e9;
    --c-purple: #8b5cf6;
    --c-amber: #f59e0b;
}

[data-theme="dark"] {
    --bg-color: #05070b;
    --surface-color: rgba(15, 23, 42, 0.5);
    --surface-alt: rgba(30, 41, 59, 0.6);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent-color: #34d399;
    --accent-hover: #10b981;
    --accent-glow: rgba(16, 185, 129, 0.35);
    --card-hover-bg: rgba(30, 41, 59, 0.8);

    --c-emerald: #34d399;
    --c-red: #d33434;
    --c-blue: #38bdf8;
    --c-purple: #a78bfa;
    --c-amber: #fbbf24;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: background-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                color 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                backdrop-filter 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 105px;
    font-size: 16px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* RUCHOMY WZOREK W TLE (W STYLU PŁYNĄCYCH ELEMENTÓW GEOMETRYCZNYCH) */
.geometric-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.geometric-bg span {
    position: absolute;
    display: block;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.25;
    animation: floatOrb 20s infinite alternate linear;
}

.geometric-bg span:nth-child(1) { width: 400px; height: 400px; background: var(--accent-color); top: -10%; left: -10%; animation-duration: 25s; }
.geometric-bg span:nth-child(2) { width: 500px; height: 500px; background: var(--c-blue); bottom: -20%; right: -10%; animation-duration: 30s; animation-direction: reverse; }
.geometric-bg span:nth-child(3) { width: 350px; height: 350px; background: var(--c-purple); top: 40%; left: 60%; animation-duration: 22s; }
.geometric-bg span:nth-child(4) { width: 300px; height: 300px; background: var(--c-red); bottom: 20%; left: 10%; animation-duration: 28s; }

@keyframes floatOrb {
    0% { transform: translate(0px, 0px) scale(1); }
    50% { transform: translate(60px, 40px) scale(1.1); }
    100% { transform: translate(-40px, 80px) scale(0.9); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes floatSlow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.animate-fade { animation: fadeInUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.animate-float { animation: floatSlow 6s ease-in-out infinite; }

/* NAGŁÓWEK (GLASSMORPHISM) */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--surface-color);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.04);
}

.logo {
    font-size: clamp(18px, 4vw, 22px);
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    font-weight: 500;
    color: var(--text-muted);
    font-size: clamp(13px, 3vw, 16px);
    letter-spacing: 0px;
}

nav {
    display: flex;
    align-items: center;
    gap: clamp(12px, 3vw, 24px);
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: clamp(13px, 1.5vw, 14px);
}

nav a:hover {
    color: var(--text-main);
}

/* NOWOCZESNE PRZYCISKI Z EFEKTEM SZKŁA I GLOW */
.btn {
    padding: 12px 26px;
    border-radius: 16px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    font-size: 15px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #ffffff;
    box-shadow: 0 0 35px var(--accent-glow), 0 6px 20px rgba(0,0,0,0.15);
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 45px var(--accent-glow), 0 8px 25px rgba(0,0,0,0.25);
}

.btn-outline {
    background: var(--surface-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 24px rgba(0,0,0,0.04);
}

.btn-outline:hover {
    background: var(--card-hover-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

/* HERO - WYCENTROWANY PIERWSZY WIDOK (FULLSCREEN) */
.hero {
    min-height: calc(100vh - 85px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    max-width: 950px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 20px;
    position: relative;
}

.hero-content {
    margin: auto;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-alt);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 8px 18px;
    border-radius: 30px;
    font-size: clamp(12px, 2vw, 13.5px);
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 24px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.03);
}

.hero h1 {
    font-size: clamp(32px, 6vw, 58px);
    font-weight: 800;
    margin-bottom: 22px;
    letter-spacing: -1.5px;
    line-height: 1.1;
}

.hero p {
    font-size: clamp(15px, 2vw, 19px);
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* SEKCJA FUNKCJI (GLASS CARDS) */
.features-container {
    max-width: 1200px;
    margin: 0 auto clamp(50px, 8vw, 90px) auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    font-size: clamp(26px, 4vw, 34px);
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: clamp(14px, 2vw, 16px);
    color: var(--text-muted);
    margin-bottom: 45px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: var(--surface-color);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: clamp(24px, 4vw, 36px);
    box-shadow: 0 16px 48px 0 rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-color);
    box-shadow: 0 20px 60px 0 rgba(0, 0, 0, 0.09);
    background: var(--card-hover-bg);
}

.card-icon {
    font-size: 26px;
    background: var(--surface-alt);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    width: 62px;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    margin-bottom: 22px;
    border: 1px solid var(--border-color);
}

.card-icon.emerald { color: var(--c-emerald); }
.card-icon.red { color: var(--c-red); }
.card-icon.blue { color: var(--c-blue); }
.card-icon.purple { color: var(--c-purple); }

.card h3 {
    font-size: clamp(18px, 2.5vw, 20px);
    font-weight: 700;
    margin-bottom: 10px;
}

.card p {
    color: var(--text-muted);
    font-size: 14.5px;
}

/* BANNERY INFORMACYJNE */
.info-banner-section {
    max-width: 1200px;
    margin: 0 auto clamp(50px, 8vw, 90px) auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.info-box {
    background: var(--surface-color);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: clamp(24px, 4vw, 34px);
    display: flex;
    gap: 22px;
    align-items: flex-start;
    box-shadow: 0 16px 48px 0 rgba(0, 0, 0, 0.05);
}

.info-icon {
    font-size: 26px;
    background: var(--surface-alt);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 18px;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

.info-icon.emerald { color: var(--c-emerald); }
.info-icon.blue { color: var(--c-blue); }

.info-box h3 {
    font-size: clamp(16px, 2vw, 18px);
    font-weight: 700;
    margin-bottom: 8px;
}

.info-box p {
    color: var(--text-muted);
    font-size: 14px;
}

/* SEKCJA SYNCHRONIZACJI */
.sync-section {
    background: var(--surface-color);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: clamp(50px, 8vw, 90px) 20px;
    margin-bottom: clamp(50px, 8vw, 90px);
    box-shadow: inset 0 0 50px rgba(0,0,0,0.02);
}

.sync-content {
    max-width: 1050px;
    margin: 0 auto;
    text-align: center;
}

.sync-content h2 {
    font-size: clamp(26px, 4vw, 36px);
    font-weight: 800;
    margin-bottom: 16px;
}

.sync-lead {
    font-size: clamp(15px, 2vw, 17px);
    color: var(--text-muted);
    max-width: 750px;
    margin: 0 auto 55px auto;
}

.sync-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
    text-align: left;
}

.sync-item {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}

.sync-mini-icon {
    font-size: 20px;
    background: var(--surface-alt);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.sync-mini-icon.emerald { color: var(--c-emerald); }
.sync-mini-icon.blue { color: var(--c-blue); }
.sync-mini-icon.purple { color: var(--c-purple); }

.sync-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.sync-item p {
    font-size: 13.5px;
    color: var(--text-muted);
}

/* FAQ */
.faq-section {
    max-width: 1200px;
    margin: 0 auto clamp(50px, 8vw, 90px) auto;
    padding: 0 20px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 45px;
}

.faq-card {
    background: var(--surface-color);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: clamp(24px, 4vw, 34px);
    box-shadow: 0 16px 48px 0 rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.faq-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
    box-shadow: 0 20px 60px 0 rgba(0, 0, 0, 0.09);
    background: var(--card-hover-bg);
}

.faq-card h4 {
    font-size: clamp(16px, 2vw, 18px);
    font-weight: 700;
    margin-bottom: 12px;
}

.faq-card p {
    font-size: 14px;
    color: var(--text-muted);
}

/* STOPKA */
footer {
    border-top: 1px solid var(--border-color);
    padding: clamp(35px, 6vw, 55px) 20px;
    background: var(--surface-color);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-bottom-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 800px;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.lang-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-alt);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 13px;
}

.lang-selector select {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
    font-size: 13px;
    outline: none;
}

.theme-switcher {
    display: inline-flex;
    background: var(--surface-alt);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    padding: 4px;
}

.theme-btn {
    background: transparent;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.theme-btn.active {
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-main);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.copyright {
    font-size: 13px;
    color: var(--text-muted);
}

/* BANNER COOKIES (GLASS) */
#cookie-banner {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    max-width: 440px;
    background: var(--surface-color);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--border-color);
    padding: clamp(20px, 4vw, 28px);
    border-radius: 24px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
    z-index: 1000;
    animation: fadeInUp 0.5s ease forwards;
}

@media (min-width: 480px) {
    #cookie-banner {
        right: auto;
    }
}

.cookie-content {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 20px;
}

.cookie-icon {
    font-size: 26px;
    color: var(--accent-color);
    background: var(--surface-alt);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 14px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

.cookie-text h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-main);
}

.cookie-text p {
    font-size: 13.5px;
    color: var(--text-muted);
    line-height: 1.5;
}

.cookie-actions {
    display: flex;
    gap: 12px;
}

.cookie-actions .btn {
    flex: 1;
    padding: 10px;
    font-size: 13.5px;
    text-align: center;
}

/* MEDIA QUERIES DLA DUŻYCH EKRANÓW / TV */
@media (min-width: 1440px) {
    html {
        font-size: 18px;
    }
    .hero, .features-container, .info-banner-section, .sync-content, .faq-section, .footer-content {
        max-width: 1350px;
    }
}

@media (min-width: 2000px) {
    html {
        font-size: 20px;
    }
    .hero, .features-container, .info-banner-section, .sync-content, .faq-section, .footer-content {
        max-width: 1600px;
    }
}
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
}

@media (max-width: 768px) {
    header {
        padding: 14px 20px;
    }

    .mobile-menu-btn {
        display: block;
    }

    nav {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--surface-color);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        align-items: center;
        padding: 24px 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: clip-path 0.4s ease-in-out;
        pointer-events: none;
    }

    nav.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
        pointer-events: auto;
    }

    nav a {
        font-size: 16px;
        padding: 8px 0;
    }
}

/* --- POPRAWKA DLA SEKCJI TECHNOLOGIA / SYNC --- */
.sync-section {
    padding: clamp(40px, 6vw, 90px) 16px;
}

.sync-grid {
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .sync-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 32px;
    }
}