/* ==========================================================================
   CSS RESET & VARIABLES
   ========================================================================== */
:root {
    /* Color Palette - Premium Off-White / Soft Gray Theme */
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f4f4f5;
    
    --text-primary: #18181b;
    --text-secondary: #52525b;
    --text-muted: #8e8e93;
    
    --accent-color: #2563eb;       /* Royal Blue */
    --accent-hover: #1d4ed8;
    --accent-light: rgba(37, 99, 235, 0.08);
    
    --border-color: #e4e4e7;
    
    /* Typography */
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --container-width: 1140px;
    --section-padding: 100px 24px;
    
    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.08);
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ==========================================================================
   REUSABLE UTILITIES & REVEAL ON SCROLL
   ========================================================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

.section {
    padding: var(--section-padding);
}

.bg-light {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    max-width: 650px;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-color);
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.25;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Reveal Animation styles */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Custom Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #ffffff;
    border: none;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    transform: translateY(-2px);
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(250, 250, 250, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(228, 228, 231, 0.5);
    transition: var(--transition-smooth);
}

.header.scrolled {
    padding: 12px 0;
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
}

.header.scrolled .nav-container {
    padding: 10px 24px;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.5px;
}

.logo-text span {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-left: 4px;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    position: relative;
    padding: 6px 0;
    transition: var(--transition-smooth);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition-smooth);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-nav-toggle .bar {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 4px 0;
    transition: var(--transition-smooth);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    padding: 160px 24px 100px 24px;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    background-color: var(--accent-light);
    color: var(--accent-color);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.8rem;
    border-radius: 100px;
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: -0.5px;
    margin-bottom: 24px;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
}

.image-border-effect {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 1 / 1;
    width: 100%;
    max-width: 360px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
}

.image-border-effect:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(15%);
    transition: var(--transition-smooth);
}

.image-border-effect:hover .hero-image {
    filter: grayscale(0%);
    scale: 1.05;
}

.profile-logo-overlay {
    position: absolute;
    bottom: 16px;
    right: 16px;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 8px 12px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    z-index: 2;
    transition: var(--transition-smooth);
}

.profile-logo-overlay img {
    height: 20px;
    width: auto;
    object-fit: contain;
}

.image-border-effect:hover .profile-logo-overlay {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   EXPERTISE SECTION
   ========================================================================== */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.expertise-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 40px 30px;
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.expertise-card:hover {
    background-color: var(--bg-secondary);
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(37, 99, 235, 0.2);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-light);
    color: var(--accent-color);
    border-radius: 8px;
    font-size: 1.25rem;
    margin-bottom: 24px;
    transition: var(--transition-smooth);
}

.expertise-card:hover .card-icon {
    background-color: var(--accent-color);
    color: #ffffff;
}

.expertise-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.expertise-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: 80px;
    margin-bottom: 100px;
}

.project-item {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.project-item.reverse {
    grid-template-columns: 0.9fr 1.1fr;
}

.project-item.reverse .project-image-side {
    order: 2;
}

.project-image-side {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    aspect-ratio: 16 / 10;
    background-color: var(--bg-tertiary);
    transition: var(--transition-smooth);
}

.project-image-side img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.project-image-side:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(37, 99, 235, 0.2);
}

.project-image-side:hover img {
    scale: 1.03;
}

.project-status {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.85rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.project-role {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.project-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.achievement-highlight {
    background-color: var(--bg-tertiary);
    border-left: 4px solid var(--accent-color);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tags span {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

/* Strategic Partnerships Block */
.partnerships-block {
    margin-top: 120px;
    padding-top: 80px;
    border-top: 1px solid var(--border-color);
}

.partnerships-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 8px;
}

.partnerships-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-align: center;
    margin-bottom: 48px;
}

.partners-logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.partner-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition-smooth);
}

.partner-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.15);
}

.partner-icon {
    font-size: 1.75rem;
    color: var(--accent-color);
    margin-bottom: 16px;
}

.partner-card h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.partner-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ==========================================================================
   EXPERIENCE / TIMELINE SECTION
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0 auto;
    padding-left: 32px;
    border-left: 2px solid var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 20px;
}

.timeline-dot {
    position: absolute;
    left: -41px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: #ffffff;
    border: 4px solid var(--accent-color);
    transition: var(--transition-smooth);
}

.timeline-item:hover .timeline-dot {
    background-color: var(--accent-color);
    scale: 1.2;
}

.timeline-date {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 6px;
}

.timeline-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.timeline-company {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info-panel h3, .featured-media h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.contact-info-panel p, .featured-media p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 30px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-link-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition-smooth);
}

.contact-link-card:hover {
    transform: translateX(6px);
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
}

.link-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #ffffff;
    font-size: 1.1rem;
}

.link-icon.linkedin { background-color: #0077b5; }
.link-icon.company { background-color: #4b5563; }
.link-icon.steam { background-color: #171a21; }
.link-icon.phone { background-color: #10b981; }
.link-icon.line { background-color: #06c755; }
.link-icon.telegram { background-color: #0088cc; }

.link-detail {
    display: flex;
    flex-direction: column;
}

.link-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.link-value {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.media-articles {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.article-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: var(--transition-smooth);
}

.article-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.15);
}

.article-meta {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.article-item h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}

.read-more {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.article-item:hover .read-more {
    color: var(--accent-color);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    padding: 40px 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--text-primary);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 991px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-image-wrapper {
        order: 1;
    }
    
    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .project-item, .project-item.reverse {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .project-item.reverse .project-image-side {
        order: 0;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px 20px;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .mobile-nav-toggle {
        display: block;
        z-index: 1001;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--bg-secondary);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
        flex-direction: column;
        padding: 100px 40px;
        gap: 24px;
        transition: var(--transition-smooth);
        z-index: 1000;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .mobile-nav-toggle.active .bar:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }
    
    .mobile-nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }
    
    .partners-logos {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}