/* ============================================
   DEKRA NORISKO BLOG - STYLE PRINCIPAL
   Tendances 2026 - Mobile First Design
   ============================================ */

/* Variables CSS - Design System */
:root {
    /* Couleurs principales DEKRA */
    --color-dekra-green: #00823B;
    --color-dekra-green-light: #00A651;
    --color-dekra-green-dark: #006129;
    --color-norisko-yellow: #FFD200;
    --color-norisko-orange: #FF8C00;
    
    /* Palette étendue */
    --color-primary: var(--color-dekra-green);
    --color-secondary: var(--color-norisko-yellow);
    --color-accent: var(--color-norisko-orange);
    
    /* Couleurs neutres */
    --color-dark: #1A1A1A;
    --color-gray-900: #2D2D2D;
    --color-gray-800: #3D3D3D;
    --color-gray-700: #5D5D5D;
    --color-gray-600: #7D7D7D;
    --color-gray-500: #9D9D9D;
    --color-gray-400: #BEBEBE;
    --color-gray-300: #DEDEDE;
    --color-gray-200: #EFEFEF;
    --color-gray-100: #F7F7F7;
    --color-white: #FFFFFF;
    
    /* Backgrounds */
    --bg-primary: var(--color-white);
    --bg-secondary: var(--color-gray-100);
    --bg-dark: var(--color-dark);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', var(--font-primary);
    
    /* Font sizes - Responsive */
    --fs-xs: 0.75rem;      /* 12px */
    --fs-sm: 0.875rem;     /* 14px */
    --fs-base: 1rem;       /* 16px */
    --fs-lg: 1.125rem;     /* 18px */
    --fs-xl: 1.25rem;      /* 20px */
    --fs-2xl: 1.5rem;      /* 24px */
    --fs-3xl: 1.875rem;    /* 30px */
    --fs-4xl: 2.25rem;     /* 36px */
    --fs-5xl: 3rem;        /* 48px */
    --fs-6xl: 3.75rem;     /* 60px */
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Z-index scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark mode variables */
[data-theme="dark"] {
    --bg-primary: var(--color-gray-900);
    --bg-secondary: var(--color-dark);
    --bg-dark: var(--color-gray-800);
    --color-dark: var(--color-white);
    --color-gray-900: var(--color-gray-100);
    --color-gray-800: var(--color-gray-200);
    --color-gray-700: var(--color-gray-300);
    --color-gray-600: var(--color-gray-400);
    --color-gray-500: var(--color-gray-500);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}

::-moz-selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* Scrollbar personnalisée */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border-radius: 0 0 var(--radius-md) 0;
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
}

.skip-to-content:focus {
    top: 0;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-base); }

@media (min-width: 768px) {
    h1 { font-size: var(--fs-5xl); }
    h2 { font-size: var(--fs-4xl); }
}

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

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

a:hover {
    color: var(--color-dekra-green-dark);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
}

[data-theme="dark"] .site-header {
    background: rgba(29, 29, 29, 0.85);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

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

.navbar {
    padding: var(--spacing-sm) 0;
}

/* Brand */
.navbar-brand {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.brand-logos {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
}

.brand-dekra {
    color: var(--color-dekra-green);
}

.brand-norisko {
    color: var(--color-gray-800);
}

.brand-separator {
    color: var(--color-gray-400);
    font-weight: 300;
}

.brand-subtitle {
    font-size: var(--fs-xs);
    color: var(--color-gray-600);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Navigation Links */
.nav-link {
    color: var(--color-gray-700);
    font-weight: 500;
    font-size: var(--fs-sm);
    padding: 0.5rem 1rem !important;
    transition: all var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* Theme Toggle */
.btn-theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-gray-300);
    background: transparent;
    color: var(--color-gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

[data-theme="dark"] .btn-theme-toggle {
    border-color: var(--color-gray-600);
    color: var(--color-gray-300);
}

.btn-theme-toggle:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
    transform: rotate(180deg);
}

[data-theme="dark"] .btn-theme-toggle:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* CTA Button */
.btn-cta {
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--fs-sm);
    white-space: nowrap;
}

/* ============================================
   HERO SECTION - Simple & Professional with Background
   ============================================ */
/* ============================================
   HERO SECTION WITH INTEGRATED SEARCH
   ============================================ */

.hero-section {
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
        url('https://images.unsplash.com/photo-1619642751034-765dfdf7c58e?w=1920&h=800&fit=crop&q=80');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    border-bottom: 1px solid var(--color-gray-200);
    position: relative;
}

[data-theme="dark"] .hero-section {
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.75)),
        url('https://images.unsplash.com/photo-1619642751034-765dfdf7c58e?w=1920&h=800&fit=crop&q=80');
    border-bottom-color: var(--color-gray-700);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    padding: var(--spacing-xl) 0 0;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: var(--fs-lg);
    color: var(--color-white);
    line-height: 1.6;
    margin-bottom: 0;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

/* ============================================
   SEARCH & FILTER - Integrated in Hero
   ============================================ */

.search-wrapper {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    max-width: 1000px;
    margin: 0 auto;
}

[data-theme="dark"] .search-wrapper {
    background: var(--color-gray-800);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.search-input-wrapper {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-500);
    pointer-events: none;
    z-index: 1;
}

.search-input {
    padding-left: 3rem;
    padding-right: 3rem;
    height: 48px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--fs-base);
    transition: all var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0, 130, 59, 0.1);
}

.btn-clear-search {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--color-gray-500);
    cursor: pointer;
    padding: 0.25rem;
    transition: color var(--transition-fast);
}

.btn-clear-search:hover {
    color: var(--color-gray-800);
}

.filter-select {
    height: 48px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--fs-base);
    transition: all var(--transition-fast);
}

.filter-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0, 130, 59, 0.1);
}

/* View Toggle */
.view-toggle {
    display: flex;
    gap: 0.5rem;
}

.btn-view {
    width: 48px;
    height: 48px;
    border: 2px solid var(--color-gray-300);
    background: transparent;
    border-radius: var(--radius-lg);
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-view:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-view.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* ============================================
   SECTIONS COMMUNES
   ============================================ */

section {
    position: relative;
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

.section-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(0, 130, 59, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: var(--fs-4xl);
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: var(--fs-lg);
    color: var(--color-gray-600);
    max-width: 700px;
}

/* ============================================
   BUTTONS - Style 2026
   ============================================ */

.btn {
    font-weight: 600;
    font-family: var(--font-primary);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1.5rem;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn-primary {
    background: var(--color-primary) !important;
    color: var(--color-white) !important;
    border-color: var(--color-primary) !important;
}

.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background: var(--color-dekra-green-dark) !important;
    border-color: var(--color-dekra-green-dark) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Override Bootstrap badges bleus */
.badge.bg-primary, .bg-primary {
    background-color: var(--color-primary) !important;
}

.badge.bg-info, .bg-info {
    background-color: var(--color-primary) !important;
}

.text-primary {
    color: var(--color-primary) !important;
}

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

.btn-outline-primary:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

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

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

.btn-outline-secondary {
    background: transparent;
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}

.btn-outline-secondary:hover,
.btn-outline-secondary.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */

.btn-scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-xl);
}

.btn-scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.btn-scroll-top:hover {
    background: var(--color-dekra-green-dark);
    transform: translateY(-5px);
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 991px) {
    .navbar-collapse {
        background: var(--bg-primary);
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
        margin-top: var(--spacing-sm);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-link {
        padding: 0.75rem 1rem !important;
    }
    
    .btn-theme-toggle {
        margin: 0.5rem 0;
    }
}

@media (max-width: 767px) {
    .hero-stats {
        gap: var(--spacing-md);
    }
    
    .stat-number {
        font-size: var(--fs-2xl);
    }
}