/* =================================================================
   SLP Stage - Global Styles
   Design System: Modern Minimalism (Premium)
   ================================================================= */

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

:root {
    /* Color System */
    --primary-500: #0057B7;
    --primary-700: #00438E;
    --primary-100: #E6F0F8;
    --neutral-900: #111827;
    --neutral-600: #4B5563;
    --neutral-300: #D1D5DB;
    --neutral-100: #F8F9FA;
    --base-white: #FFFFFF;
    --semantic-success: #10B981;
    --semantic-error: #EF4444;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    --spacing-xxxl: 96px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;

    /* Shadows */
    --shadow-md: 0 4px 12px rgba(0, 87, 183, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 87, 183, 0.12);

    /* Transitions */
    --transition-base: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-long: all 350ms ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--neutral-900);
    background-color: var(--neutral-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--neutral-900);
}

h2 {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--neutral-900);
}

h3 {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--neutral-900);
}

p {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7;
    color: var(--neutral-600);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

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

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.nav-logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-500);
}

.logo-text {
    letter-spacing: -1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--neutral-900);
    transition: var(--transition-base);
}

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

.nav-links a {
    font-size: 16px;
    font-weight: 500;
    color: var(--neutral-600);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary-500);
    transition: var(--transition-base);
    transform: translateX(-50%);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-500);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Language Switcher */
.language-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--neutral-100);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--neutral-900);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-base);
}

.lang-btn:hover {
    background-color: var(--primary-100);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    background-color: var(--base-white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xs);
    min-width: 140px;
    display: none;
    flex-direction: column;
    gap: 4px;
}

.lang-dropdown.show {
    display: flex;
}

.lang-dropdown button {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--neutral-900);
    transition: var(--transition-base);
}

.lang-dropdown button:hover {
    background-color: var(--primary-100);
    color: var(--primary-500);
}

/* =================================================================
   Hero Section
   ================================================================= */
.hero {
    padding: var(--spacing-xxxl) 0;
    background-color: var(--base-white);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-text h1 {
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: var(--spacing-lg);
    color: var(--neutral-600);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.hero-image {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* =================================================================
   Buttons
   ================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px var(--spacing-md);
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    text-align: center;
    line-height: 1;
    min-height: 52px;
}

.btn-primary {
    background-color: var(--primary-500);
    color: var(--base-white);
}

.btn-primary:hover {
    background-color: var(--primary-700);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-500);
    border: 2px solid var(--primary-500);
}

.btn-secondary:hover {
    background-color: var(--primary-100);
}

/* =================================================================
   Section Styles
   ================================================================= */
section {
    padding: var(--spacing-xxxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 18px;
    color: var(--neutral-600);
}

/* =================================================================
   About Section
   ================================================================= */
.about-section {
    background-color: var(--neutral-100);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    background-color: var(--base-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.about-text h3 {
    color: var(--primary-500);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-lg);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--neutral-100);
}

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

.stat-number {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary-500);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 14px;
    color: var(--neutral-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* =================================================================
   Products Section
   ================================================================= */
.products-section {
    background-color: var(--base-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background-color: var(--base-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-long);
}

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

.product-image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: var(--neutral-100);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-long);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

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

.product-content h3 {
    margin-bottom: var(--spacing-sm);
}

.product-content p {
    font-size: 15px;
    margin-bottom: var(--spacing-sm);
    min-height: 48px;
}

.product-specs {
    list-style: none;
    margin: var(--spacing-sm) 0;
    padding: var(--spacing-sm) 0;
    border-top: 1px solid var(--neutral-100);
}

.product-specs li {
    font-size: 14px;
    color: var(--neutral-600);
    padding: 4px 0;
    padding-left: var(--spacing-sm);
    position: relative;
}

.product-specs li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-500);
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-500);
    font-weight: 500;
    margin-top: var(--spacing-sm);
}

.product-link svg {
    transition: var(--transition-base);
}

.product-card:hover .product-link svg {
    transform: translateX(4px);
}

/* =================================================================
   Services Section
   ================================================================= */
.services-section {
    background-color: var(--neutral-100);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background-color: var(--base-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-long);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-100);
    border-radius: 50%;
    color: var(--primary-500);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    font-size: 15px;
}

/* =================================================================
   Projects Section
   ================================================================= */
.projects-section {
    background-color: var(--base-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    cursor: pointer;
    transition: var(--transition-long);
}

.project-card:hover {
    transform: scale(1.02);
}

.project-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(180deg, rgba(17, 24, 39, 0) 0%, rgba(17, 24, 39, 0.9) 100%);
    padding: var(--spacing-md);
    color: var(--base-white);
    opacity: 0;
    transition: var(--transition-long);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-overlay h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--base-white);
    margin-bottom: 4px;
}

.project-overlay p {
    font-size: 14px;
    color: var(--neutral-300);
}

/* =================================================================
   News Section
   ================================================================= */
.news-section {
    background-color: var(--neutral-100);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.news-card {
    background-color: var(--base-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-long);
}

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

.news-image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: var(--neutral-100);
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-long);
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

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

.news-date {
    font-size: 14px;
    color: var(--neutral-600);
    margin-bottom: var(--spacing-xs);
}

.news-content h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.news-content p {
    font-size: 15px;
}

/* =================================================================
   Contact Section
   ================================================================= */
.contact-section {
    background-color: var(--base-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
}

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-100);
    border-radius: var(--radius-sm);
    color: var(--primary-500);
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-900);
}

.contact-item p,
.contact-item a {
    font-size: 15px;
    color: var(--neutral-600);
}

.contact-item a:hover {
    color: var(--primary-500);
}

/* Contact Form */
.contact-form {
    background-color: var(--neutral-100);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-900);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px var(--spacing-sm);
    border: 1px solid var(--neutral-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 15px;
    color: var(--neutral-900);
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.form-group textarea {
    resize: vertical;
}

/* =================================================================
   Footer
   ================================================================= */
.footer {
    background-color: var(--neutral-900);
    color: var(--base-white);
    padding: var(--spacing-xxl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

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

.footer-section h4 {
    color: var(--base-white);
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: var(--neutral-300);
    font-size: 15px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: var(--neutral-300);
    font-size: 15px;
    transition: var(--transition-base);
}

.footer-section ul li a:hover {
    color: var(--primary-100);
}

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

.footer-bottom p {
    color: var(--neutral-300);
    font-size: 14px;
}

/* =================================================================
   Responsive Design
   ================================================================= */

/* Tablet */
@media (max-width: 1024px) {
    h1 {
        font-size: 48px;
    }

    h2 {
        font-size: 36px;
    }

    .hero-content {
        gap: var(--spacing-lg);
    }

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

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

/* Mobile */
@media (max-width: 768px) {
    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 32px;
    }

    h3 {
        font-size: 20px;
    }

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

    .nav {
        flex-wrap: wrap;
    }

    .nav-toggle {
        display: flex;
        order: 3;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        order: 4;
        padding: var(--spacing-md) 0;
        gap: var(--spacing-sm);
    }

    .nav-links.show {
        display: flex;
    }

    .nav-actions {
        order: 2;
    }

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

    .hero-content {
        grid-template-columns: 1fr;
    }

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

    .hero-actions {
        flex-direction: column;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .products-grid,
    .services-grid,
    .projects-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

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