/* ============================================
   CSG - Elegant Black & White Theme
   Font: Helvetica Neue / Helvetica
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

:root {
    /* Kolory - motyw biało-czarny */
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-dark: #1a1a1a;
    --color-gray-medium: #333333;
    --color-gray-light: #666666;
    --color-gray-lighter: #999999;
    --color-gray-lightest: #e5e5e5;
    
    /* Akcenty */
    --accent-primary: #000000;
    --accent-secondary: #ffffff;
    
    /* Typography */
    --font-primary: 'Helvetica Neue', 'Helvetica', 'Arial', sans-serif;
    --font-elegant: 'Inter', 'Helvetica Neue', 'Helvetica', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-elegant);
    background: var(--color-white);
    color: var(--color-black);
    line-height: 1.7;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-black);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
}

/* === Header === */
.header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-lightest);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    overflow: visible;
    height: auto;
    max-height: none;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    overflow: visible;
}

.logo {
    color: var(--color-black);
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 900;
    text-decoration: none;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    letter-spacing: -0.02em;
    transition: opacity var(--transition-fast);
    overflow: visible;
    position: relative;
    height: auto;
}

.logo:hover {
    opacity: 0.7;
}

.logo-icon {
    height: 7rem;
    width: auto;
    object-fit: contain;
    display: block;
    position: relative;
    z-index: 1;
    margin-top: -2rem;
    margin-bottom: -2rem;
}

.logo i {
    font-size: 1.3rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.nav-link {
    color: var(--color-black);
    text-decoration: none;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
}

.nav-link:hover {
    color: var(--color-black);
    border-bottom: 2px solid var(--color-black);
    padding-bottom: calc(0.6rem - 2px);
}

.nav-link.active {
    border-bottom: 2px solid var(--color-black);
    padding-bottom: calc(0.6rem - 2px);
    font-weight: 600;
}

.lang-switcher {
    display: flex;
    gap: 0.5rem;
    margin-left: var(--spacing-sm);
    padding-left: var(--spacing-sm);
    border-left: 1px solid var(--color-gray-lightest);
}

.lang-switcher a {
    color: var(--color-gray-medium);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    padding: 0.3rem 0.5rem;
    transition: color var(--transition-fast);
}

.lang-switcher a:hover,
.lang-switcher a.active {
    color: var(--color-black);
}

/* === Hero Section === */
.hero-section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    max-height: 900px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-black);
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: var(--color-white);
    padding: var(--spacing-md);
    max-width: 1200px;
}

.hero-slogan {
    font-family: var(--font-primary);
    font-size: clamp(3rem, 8vw, 8rem);
    font-weight: 900;
    letter-spacing: -0.05em;
    line-height: 1;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 300;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.9;
}

/* === Container === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    font-family: var(--font-primary);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 900;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2.5rem;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    border: 2px solid var(--color-black);
    background: var(--color-black);
    color: var(--color-white);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.btn:hover {
    background: var(--color-white);
    color: var(--color-black);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

.btn-outline:hover {
    background: var(--color-black);
    color: var(--color-white);
}

/* === Forms === */
.form-container {
    background: var(--color-white);
    border: 1px solid var(--color-gray-lightest);
    padding: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-black);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.9rem;
    border: 1px solid var(--color-gray-lightest);
    background: var(--color-white);
    color: var(--color-black);
    font-family: var(--font-elegant);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-black);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

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

/* === Cards === */
.card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-lightest);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

/* === Footer === */
.footer {
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xxl);
    border-top: 1px solid var(--color-gray-dark);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-section h3 {
    color: var(--color-white);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-section a {
    color: var(--color-gray-lighter);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--color-white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-dark);
    color: var(--color-gray-lighter);
    font-size: 0.9rem;
}

/* === Messages === */
.message {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 0;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
    background: var(--color-gray-lightest);
}

.message.success {
    border-color: var(--color-black);
    background: var(--color-white);
}

.message.error {
    border-color: var(--color-black);
    background: #f5f5f5;
}

/* === Responsive === */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-links {
        width: 100%;
        justify-content: center;
    }

    .hero-slogan {
        font-size: clamp(2rem, 10vw, 4rem);
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .container {
        padding: var(--spacing-sm);
    }
}

/* === Utility Classes === */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }