:root {
    /* Colors */
    --primary-color: #2289e4;
    --primary-hover: #1a6cb3;
    --accent-color: #00d2ff;
    --bg-body: #0b121e;
    --bg-card: #162032;
    --bg-card-hover: #1c283f;
    --text-main: #ffffff;
    --text-secondary: #94a3b8;
    --success: #10b981;
    
    /* Gradients */
    --gradient-btn: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    --gradient-hover: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --fs-h1: clamp(1.75rem, 5vw, 3.5rem);
    --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
    --fs-body: 1rem;
    
    /* Spacing & Sizing */
    --container-width: 1200px;
    --spacing-sm: 0.5rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 2rem;
    
    /* Shadows */
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(34, 137, 228, 0.4);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.row-center {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
}

.col-xs-12 {
    width: 100%;
    flex: 0 0 100%;
}

.text-center {
    text-align: center;
}

.center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.pa-0 {
    padding: 0 !important;
}

/* Header Section */
header.bg-bk {
    background: radial-gradient(circle at top center, #1b2942 0%, var(--bg-body) 70%);
    padding: var(--spacing-lg) 0;
    position: relative;
    overflow: hidden;
}

/* Logo Animation */
.logo {
    width: 12rem;
    height: auto;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 0 10px rgba(34, 137, 228, 0.3));
    transition: transform var(--transition-smooth);
}

.logo:hover {
    transform: scale(1.05) translateY(-2px);
}

/* Headings */
h1 {
    font-size: var(--fs-h1);
    font-weight: 800;
    text-align: center;
    text-transform: uppercase;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h1 span {
    color: var(--primary-color);
    display: block;
    font-size: 1.2em;
    text-shadow: 0 0 20px rgba(34, 137, 228, 0.5);
}

/* Promo Card Component */
.item-promo-kod {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-soft);
    max-width: 800px;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.item-promo-kod::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
}

.item-name {
    flex: 1;
    min-width: 200px;
}

.item-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.item-title.color {
    color: var(--primary-color);
    font-weight: 700;
}

.item-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-main);
}

.item-copy {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px dashed var(--text-secondary);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.item-copy:hover {
    border-color: var(--primary-color);
    background: rgba(34, 137, 228, 0.1);
}

.item-copy p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.promo-text {
    font-family: monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 0.1em;
}

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    text-decoration: none;
    background: var(--gradient-btn);
    border-radius: 50px;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-glow);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
    user-select: none;
    margin: var(--spacing-sm) 0;
}

.button::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: 0.5s;
}

.button:hover {
    background: var(--gradient-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(34, 137, 228, 0.6);
}

.button:hover::after {
    left: 100%;
}

.button:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
}

/* Content Section */
.content {
    padding: var(--spacing-lg) 0;
}

.content h2 {
    font-size: var(--fs-h2);
    color: var(--text-main);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-left: 1rem;
    border-left: 4px solid var(--primary-color);
}

.content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 1.05rem;
    text-align: justify;
}

.content ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
    padding-left: 0;
}

.content ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.content ul li::before {
    content: '•';
    color: var(--primary-color);
    font-size: 1.5rem;
    position: absolute;
    left: 0;
    top: -0.2rem;
}

/* Images in Content */
.content .img {
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    position: relative;
}

.content .img img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.content .img:hover img {
    transform: scale(1.03);
}

/* Footer */
footer {
    background: #080d16;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

footer p {
    color: #556275;
    font-size: 0.875rem;
    text-align: center;
    max-width: 800px;
    line-height: 1.5;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
    }

    h1 span {
        display: inline-block;
        margin-right: 0.5rem;
    }

    .item-promo-kod {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .item-name {
        margin-bottom: var(--spacing-sm);
    }
    
    .item-copy {
        width: 100%;
    }

    .content h2 {
        border-left: none;
        padding-left: 0;
        text-align: center;
        color: var(--primary-color);
    }

    .content p {
        text-align: left;
    }
    
    .button {
        width: 100%;
        max-width: 300px;
    }
}

@media (min-width: 769px) {
    .content .row-center {
        display: block; /* Restore normal block flow for text content reading */
        max-width: 900px;
        margin: 0 auto;
    }
}