/**
 * main.css - Główne style strony eMTBnews.com
 * 
 * Zawiera style dla layoutu, typografii i podstawowych elementów
 */

/* ===== Zmienne CSS ===== */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;
    --color-primary-lighter: #dbeafe;
    --color-secondary: #f59e0b;
    --color-accent: #10b981;
    --color-accent-light: #d1fae5;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-text-lighter: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-light: #f9fafb;
    --color-bg-lighter: #f3f4f6;
    --color-bg-dark: #111827;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    --color-error: #ef4444;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --border-radius: 12px;
    --border-radius-sm: 6px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Typografia ===== */
body {
    font-family: var(--font-primary);
    color: var(--color-text);
    background-color: var(--color-bg-light);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    letter-spacing: -0.02em;
}

h1 { 
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.1;
}
h2 { 
    font-size: 2.25rem;
    font-weight: 700;
}
h3 { 
    font-size: 1.875rem;
    font-weight: 700;
}
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.75;
}

a {
    color: var(--color-primary);
    transition: var(--transition-fast);
    text-decoration: none;
    font-weight: 500;
}

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

/* ===== Layout ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
    box-sizing: border-box;
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
    box-sizing: border-box;
}

.main-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    width: 100%;
    overflow-x: hidden;
    position: relative;
}

.main-content {
    flex: 1;
    padding: var(--spacing-xl) 0;
    background: linear-gradient(to bottom, var(--color-bg) 0%, var(--color-bg-light) 100%);
}

.content-area {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    align-items: start;
}

/* ===== Responsywność ===== */
@media (max-width: 968px) {
    .content-area {
        grid-template-columns: 1fr;
    }
    
    .main-sidebar {
        order: -1;
    }
}

@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    html {
        font-size: 14px;
    }
    
    body {
        font-size: 14px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .container {
        padding: 0 var(--spacing-sm);
        width: 100%;
        max-width: 100%;
    }
    
    .container-wide {
        padding: 0 var(--spacing-sm);
        width: 100%;
        max-width: 100%;
    }
    
    .content-area {
        gap: var(--spacing-md);
        width: 100%;
    }
    
    .main-content {
        padding: var(--spacing-md) 0;
        width: 100%;
    }
}

/* ===== Przyciski ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.9375rem;
    text-align: center;
    transition: var(--transition-fast);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

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

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #fbbf24 100%);
    color: white;
    border-color: var(--color-secondary);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #d97706 0%, var(--color-secondary) 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn-outline {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: transparent;
    box-shadow: none;
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

/* ===== Karty ===== */
.card {
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    transition: var(--transition);
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-primary-lighter);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.card-content {
    color: var(--color-text-light);
}

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

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

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

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

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

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.no-articles {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}