/* Zmienne CSS */
:root {
    --primary: #df2919;
    --accent: #2dc6f5;
    --dark-bg: #1a1a1a;
    --light-bg: #f5f5f5;
    --card-bg: #252525;
    --card-bg-light: #ffffff;
    --light-text: #ffffff;
    --dark-text: #333333;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --header-height: 80px;
}

/* Reset i Globalne */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--dark-bg);
    color: var(--light-text);
    font-family: 'Manrope', sans-serif;
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
}

body.light {
    background: var(--light-bg);
    color: var(--dark-text);
}

/* Nagłówek */
.header {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    height: var(--header-height);
    z-index: 1000;
    border-bottom: 2px solid var(--primary);
}

body.light .header {
    background: rgba(255, 255, 255, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-png {
    height: 40px;
    transition: transform var(--transition);
}

.logo-png:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2rem;
    transition: right var(--transition); /* Dodaj tę linię */
}

.nav-link {
    color: var(--light-text);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: color var(--transition);
}

body.light .nav-link {
    color: var(--dark-text);
}

.nav-link:hover, .nav-link.active {
    color: var(--accent);
}

.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    padding: 10px;
}

.hamburger-inner, .hamburger-inner::before, .hamburger-inner::after {
    width: 30px;
    height: 2px;
    background: var(--light-text);
    position: relative;
    transition: transform var(--transition);
}

body.light .hamburger-inner, body.light .hamburger-inner::before, body.light .hamburger-inner::after {
    background: var(--dark-text);
}

.hamburger-inner::before, .hamburger-inner::after {
    content: '';
    position: absolute;
}

.hamburger-inner::before {
    top: -8px;
}

.hamburger-inner::after {
    bottom: -8px;
}

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition);
}

.menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--light-text);
    font-size: 1.2rem;
    cursor: pointer;
}

body.light .theme-toggle {
    color: var(--dark-text);
}

/* Breadcrumbs */
.breadcrumbs {
    max-width: 1200px;
    margin: calc(var(--header-height) + 1rem) auto 1rem;
    padding: 0 2rem;
    font-size: 0.9rem;
}

.breadcrumbs a {
    color: var(--accent);
    text-decoration: none;
}

.breadcrumbs a:hover {
    text-decoration: underline;
}

.breadcrumbs span {
    color: #aaa;
}

body.light .breadcrumbs span {
    color: #666;
}

/* Główna treść */
.container {
    max-width: 800px; /* Węższy dla formalnego wyglądu */
    margin: 0 auto;
    padding: 2rem;
}

h1 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
    text-align: center;
}

p {
    font-size: 1rem;
    color: #aaa;
    margin-bottom: 1.5rem;
}

body.light p {
    color: #666;
}

/* Invoice Section */
.invoice {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 5px;
    margin: 2rem 0;
}

body.light .invoice {
    background: var(--card-bg-light);
    border: 1px solid #ddd;
}

.invoice h2 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
    text-align: center;
}

.invoice p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.invoice-table th, .invoice-table td {
    padding: 0.8rem;
    border: 1px solid #333;
    text-align: left;
}

body.light .invoice-table th, body.light .invoice-table td {
    border: 1px solid #ddd;
}

.invoice-table th {
    background: var(--primary);
    color: var(--light-text);
    font-weight: 700;
}

.invoice-table tfoot td {
    font-weight: 700;
    background: rgba(223, 41, 25, 0.1);
}

/* Footer */
body.light .footer {
    background: var(--card-bg-light);
    color: var(--dark-text);
}
.footer {
    background: var(--card-bg);
    padding: 1rem;
    text-align: center;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: #aaa;
}

body.light .footer {
    background: var(--card-bg-light);
    color: #666;
}

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

.footer a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Responsywność */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: block;
    }
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: var(--header-height);
        right: 0;
        width: 100%;
        max-width: 300px;
        height: calc(100vh - var(--header-height));
        background: rgba(26, 26, 26, 0.95);
        padding: 2rem;
        z-index: 999;
    }
    body.light .nav-links.active {
        background: rgba(255, 255, 255, 0.95);
    }
    .container {
        padding: 1rem;
    }
    h1 {
        font-size: 1.8rem;
    }
    .invoice-table th, .invoice-table td {
        font-size: 0.9rem;
    }
}
body.light .hamburger-inner,
body.light .hamburger-inner::before,
body.light .hamburger-inner::after {
    background: var(--dark-text);
}
.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    padding: 10px;
    z-index: 1001;
    width: 40px;
    height: 40px;
}

.hamburger-inner {
    display: block;
    width: 30px;
    height: 3px;
    background: var(--light-text);
    position: relative;
    transition: transform var(--transition);
    margin: 0 auto;
}

.hamburger-inner::before,
.hamburger-inner::after {
    content: '';
    display: block;
    width: 30px;
    height: 3px;
    background: var(--light-text);
    position: absolute;
    transition: transform var(--transition);
}

.hamburger-inner::before {
    top: -8px;
}

.hamburger-inner::after {
    top: 8px;
}

.hamburger.active .hamburger-inner {
    transform: rotate(45deg);
}

.hamburger.active .hamburger-inner::before {
    transform: translateY(8px) rotate(-90deg);
}

.hamburger.active .hamburger-inner::after {
    opacity: 0;
}
@media (max-width: 992px) {
    .header .nav-container .hamburger {
        display: block;
    }
}
/* Back to Top Button */
#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary);
    color: var(--light-text);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    transition: background var(--transition), opacity var(--transition);
    opacity: 0.8;
}

#back-to-top:hover {
    background: #c22417;
    opacity: 1;
}