/* ============================================
   BRIET INDUST SERVICE - Main Stylesheet
   Premium Industrial Website
   ============================================ */

/* ============================================
   CSS RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand Colors */
    --primary-color: #1a4d7a;
    --secondary-color: #2d6da3;
    --accent-color: #e63946;
    --dark-bg: #0d1b2a;
    --light-bg: #f8f9fa;
    --text-dark: #212529;
    --text-light: #6c757d;
    --white: #ffffff;
    --border-color: #dee2e6;
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Arial', 'Helvetica', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

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

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

a:hover,
a:focus {
    color: var(--accent-color);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    overflow: visible;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    max-height: 100%;
    overflow: visible;
}

.logo a {
    display: flex;
    align-items: center;
    line-height: 0;
}

.logo img,
.logo svg {
    max-height: 40px;
    width: auto;
    height: auto;
    display: block;
    visibility: visible;
    opacity: 1;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
    padding: var(--spacing-xs);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    display: block;
    transition: color var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a:focus,
.nav-menu a.active {
    color: var(--secondary-color);
    text-decoration: none;
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    height: 2px;
    background-color: var(--secondary-color);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main {
    min-height: calc(100vh - 200px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--accent-color);
    margin: var(--spacing-sm) auto;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
    color: var(--white);
    opacity: 0.9;
}

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

.hero h1 {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    text-decoration: none;
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: #c1121f;
    border-color: #c1121f;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--white);
    color: var(--primary-color);
    text-decoration: none;
}

/* ============================================
   CARDS & GRIDS
   ============================================ */
.grid {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: 1fr;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-bg);
    color: var(--primary-color);
    padding: var(--spacing-md);
}

.card-icon svg {
    width: 80px;
    height: 80px;
}

.icon-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    text-align: center;
}

.icon-block svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.card-content {
    padding: var(--spacing-md);
}

.card-title {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.card-text {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-dark);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.form-checkbox input[type="checkbox"] {
    margin-top: 4px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--dark-bg);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.footer-section h3 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    display: block;
    margin-bottom: var(--spacing-xs);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

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

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.hidden {
    display: none;
}

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (min-width: 768px) {
    html {
        font-size: 17px;
    }
    
    h1 {
        font-size: 3rem;
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        display: flex !important;
    }
}

@media (max-width: 991px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        gap: 0;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--border-color);
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .logo img,
    .logo svg {
        max-height: 30px;
    }
    
    .hero {
        padding: var(--spacing-md) 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: var(--spacing-md) 0;
    }
}

/* ============================================
   ARTICLE STYLES
   ============================================ */
.article-header {
    background-color: var(--light-bg);
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
}

.article-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.article-icon {
    width: 100%;
    max-width: 400px;
    height: 200px;
    margin: var(--spacing-md) auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-bg);
    border-radius: 8px;
    color: var(--primary-color);
}

.article-icon svg {
    width: 100px;
    height: 100px;
}

.article-content h2,
.article-content h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.article-content ul,
.article-content ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.article-content blockquote {
    border-left: 4px solid var(--secondary-color);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-style: italic;
    color: var(--text-light);
}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
    padding: var(--spacing-sm) 0;
    background-color: var(--light-bg);
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb a:hover {
    color: var(--secondary-color);
}

.breadcrumb span {
    color: var(--text-light);
    margin: 0 var(--spacing-xs);
}

/* ============================================
   LOADING & ANIMATIONS
   ============================================ */
.fade-in {
    animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   COOKIE CONSENT BANNER
   ============================================ */
.cookie-banner {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: 0 -4px 6px rgba(0, 0, 0, 0.1);
    z-index: 10001;
    padding: var(--spacing-md);
    border-top: 3px solid var(--secondary-color);
}

.cookie-banner.active {
    display: block;
}

.cookie-banner-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .cookie-banner-actions {
        flex-direction: row;
        align-items: center;
    }
}

.cookie-banner-text {
    flex: 1;
    min-width: 300px;
}

.cookie-banner-text h3 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.cookie-banner-text p {
    margin: 0;
    color: var(--text-dark);
    font-size: 0.9rem;
    line-height: 1.5;
}

.cookie-banner-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    align-items: center;
    flex-direction: column;
}

.cookie-banner-actions .btn-primary {
    white-space: nowrap;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
}

.cookie-banner-secondary-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.85rem;
}

.cookie-banner-secondary-actions .btn-link {
    background: none;
    border: none;
    color: var(--text-light);
    text-decoration: underline;
    cursor: pointer;
    padding: 0;
    font-size: 0.85rem;
    font-family: inherit;
    transition: color var(--transition-fast);
}

.cookie-banner-secondary-actions .btn-link:hover,
.cookie-banner-secondary-actions .btn-link:focus {
    color: var(--secondary-color);
    text-decoration: underline;
}

.cookie-banner-separator {
    color: var(--text-light);
    opacity: 0.5;
}

@media (max-width: 767px) {
    .cookie-banner {
        padding: var(--spacing-sm);
    }
    
    .cookie-banner-content {
        flex-direction: column;
        align-items: stretch;
    }
    
    .cookie-banner-text {
        min-width: 100%;
        margin-bottom: var(--spacing-sm);
    }
    
    .cookie-banner-actions {
        flex-direction: column;
        width: 100%;
        align-items: stretch;
    }
    
    .cookie-banner-actions .btn-primary {
        width: 100%;
    }
    
    .cookie-banner-secondary-actions {
        justify-content: center;
        margin-top: var(--spacing-xs);
    }
}

/* ============================================
   COOKIE PREFERENCES MODAL
   ============================================ */
.cookie-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.cookie-modal-overlay.active {
    display: flex;
}

.cookie-modal {
    background-color: var(--white);
    border-radius: 8px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.cookie-modal-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cookie-modal-header h2 {
    margin: 0;
    color: var(--primary-color);
}

.cookie-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background-color var(--transition-fast);
}

.cookie-modal-close:hover {
    background-color: var(--light-bg);
}

.cookie-modal-content {
    padding: var(--spacing-md);
}

.cookie-category {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--light-bg);
    border-radius: 4px;
}

.cookie-category h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
    font-size: 1.1rem;
}

.cookie-category p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-light);
}

.cookie-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cookie-toggle input[type="checkbox"] {
    width: 48px;
    height: 24px;
    appearance: none;
    background-color: var(--border-color);
    border-radius: 12px;
    position: relative;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.cookie-toggle input[type="checkbox"]:checked {
    background-color: var(--secondary-color);
}

.cookie-toggle input[type="checkbox"]::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--white);
    top: 2px;
    left: 2px;
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.cookie-toggle input[type="checkbox"]:checked::before {
    transform: translateX(24px);
}

.cookie-toggle label {
    cursor: pointer;
    font-weight: 500;
    user-select: none;
}

.cookie-toggle.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.cookie-modal-actions {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

@media (max-width: 767px) {
    .cookie-modal {
        max-width: 100%;
        margin: var(--spacing-sm);
    }
    
    .cookie-modal-actions {
        flex-direction: column;
    }
    
    .cookie-modal-actions .btn {
        width: 100%;
    }
}