/* ============================================================
   INSDAG Knowledge Hub — style.css
   Dark steel-industrial theme with glassmorphism & animations
   ============================================================ */

/* ===== BASE CONFIG (Removed global overrides to preserve portal header) ===== */
.blog-theme-wrapper {
    --primary:       #0056b3;   /* insdag blue */   /* steel red */
    --primary-dark:  #004085;
    --primary-light: #3385ff;
    --accent:        #d97706;   /* golden steel (darker for readability on light) */
    --steel-blue:    #1e3a5f;
    --steel-mid:     #f1f5f9;   /* light steel gray */
    --steel-dark:    #ffffff;   /* white background */
    --surface:       #fafafa;   /* light surface */
    --surface-2:     #f3f4f6;   /* slightly darker light surface */
    --surface-3:     #e5e7eb;   /* even darker light surface for contrast */
    --glass:         rgba(0,0,0,0.02);
    --glass-border:  rgba(0,0,0,0.08);
    --text-primary:  #0f172a;   /* dark slate text */
    --text-secondary:#334155;   /* medium slate text */
    --text-muted:    #64748b;   /* muted text */
    --shadow-glow:   0 10px 40px rgba(0,86,179,0.08);
    --radius:        12px;
    --radius-lg:     20px;
    --transition:    0.35s cubic-bezier(0.4,0,0.2,1);
    --font-main:     'Outfit', sans-serif;
    --font-body:     'Inter', sans-serif;
}

/* Scoped base styles for the blog content */
.blog-theme-wrapper {
    font-family: var(--font-body);
    background-color: var(--steel-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.blog-theme-wrapper a {  text-decoration: none; }
.blog-theme-wrapper img { max-width: 100%; display: block; }
.blog-theme-wrapper ul { list-style: none; margin: 0; padding: 0; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 13px 28px;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.02em;
}
.text-black{
    color: #000000 !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 20px rgba(0,86,179,0.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,86,179,0.5);
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--glass-border);
}
.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(0,86,179,0.08);
    transform: translateY(-2px);
}

/* ===== HERO SECTION ===== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 40%, #e2e8f0 100%);
}

.hero-bg-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 50%, rgba(0,86,179,0.06) 0%, transparent 60%),
        radial-gradient(ellipse 60% 60% at 80% 30%, rgba(30,58,95,0.08) 0%, transparent 60%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23000000' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

#particles-hero {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0.15;
    animation: float-particle linear infinite;
}

@keyframes float-particle {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 0.15; }
    90% { opacity: 0.08; }
    100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 120px 24px 80px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0,86,179,0.12);
    border: 1px solid rgba(0,86,179,0.3);
    color: var(--primary-light);
    font-size: 0.78rem;
    font-weight: 600;
    font-family: var(--font-main);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 8px 20px;
    border-radius: 30px;
    margin-bottom: 28px;
    animation: fade-in-down 0.8s ease forwards;
}

.hero-title {
    font-family: var(--font-main);
    font-size: clamp(2.4rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.12;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    animation: fade-in-up 0.9s ease 0.1s both;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 60%, #ff6b35 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: #000000;
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.7;
    animation: fade-in-up 0.9s ease 0.2s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 44px;
    flex-wrap: wrap;
    animation: fade-in-up 0.9s ease 0.3s both;
}

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

.stat-num-wrapper {
    font-family: var(--font-main);
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-primary);
    display: block;
    line-height: 1;
}

.stat-num {
    font: inherit;
    color: inherit;
}

.hero-stat .stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 4px;
    display: block;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fade-in-up 0.9s ease 0.4s both;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 2;
    animation: fade-in 1.2s ease 1s both;
}

.hero-scroll-indicator span {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 8px;
}

.scroll-arrow {
    width: 36px; height: 36px;
    border: 1.5px solid var(--glass-border);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: bounce-down 2s ease infinite;
}

@keyframes bounce-down {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ===== SECTION TABS ===== */
.section-tabs-wrapper {
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 110px;
    z-index: 90;
    padding: 0;
}

.section-tabs {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    gap: 4px;
}

.section-tabs::-webkit-scrollbar { display: none; }

.tab-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-main);
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-muted);
    background: none;
    border: none;
    padding: 16px 20px;
    cursor: pointer;
    transition: all var(--transition);
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-secondary);
    background: var(--glass);
}

.tab-btn.active {
    color: var(--text-primary);
    border-bottom-color: var(--primary);
}

.tab-btn i { font-size: 0.9rem; }

/* ===== CONTENT SECTIONS ===== */
.content-section {
    padding: 90px 0;
}

.alt-section {
    background: linear-gradient(180deg, var(--surface) 0%, var(--steel-mid) 100%);
}

/* ===== SECTION HEADER ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0,86,179,0.1);
    border: 1px solid rgba(0,86,179,0.2);
    color: var(--primary-light);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-main);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 6px 18px;
    border-radius: 30px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-main);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== BLOG CARDS CAROUSEL & MODAL ===== */
.carousel-wrapper {
    position: relative;
    padding: 0 50px;
}

.carousel-container {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    scroll-behavior: smooth;
    padding: 16px 0;
}

.carousel-container::-webkit-scrollbar {
    display: none;
}

.blog-slide-card {
    flex: 0 0 calc(33.333% - 16px);
    scroll-snap-align: start;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition);
}

.blog-slide-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1), var(--shadow-glow);
    border-color: rgba(0,86,179,0.2);
}

.blog-slide-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.blog-slide-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.blog-slide-card:hover .blog-slide-image img {
    transform: scale(1.06);
}

.blog-slide-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    color: #fff;
    z-index: 2;
}

.blog-slide-tag.sustainability { background: #16a34a; }
.blog-slide-tag.engineering { background: #2563eb; }
.blog-slide-tag.innovation { background: #7c3aed; }

.blog-slide-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-slide-meta {
    display: flex;
    gap: 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.blog-slide-meta i {
    color: var(--primary);
    margin-right: 4px;
}

.blog-slide-body h3 {
    font-family: var(--font-main);
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.blog-slide-body p {
    font-size: 0.84rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

.btn-readmore {
    background: transparent;
    border: none;
    outline: none;
    color: var(--primary);
    font-family: var(--font-main);
    font-weight: 700;
    font-size: 0.82rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0;
    transition: color var(--transition), transform var(--transition);
    align-self: flex-start;
}

.btn-readmore i {
    font-size: 0.75rem;
    transition: transform var(--transition);
}

.btn-readmore:hover {
    color: var(--primary-light);
}

.btn-readmore:hover i {
    transform: translateX(4px);
}

/* Navigation Arrows */
.carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition);
}

.carousel-nav:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0,86,179,0.3);
}

.carousel-nav.prev { left: -10px; }
.carousel-nav.next { right: -10px; }

/* Read More Modal */
.blog-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    z-index: 2000;
    transition: opacity 0.4s ease;
}

.blog-modal.open {
    opacity: 1;
    pointer-events: all;
}

.blog-modal-content {
    background: var(--steel-dark);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 720px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    padding: 40px;
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

.blog-modal.open .blog-modal-content {
    transform: scale(1);
}

.blog-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.blog-modal-close:hover {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
}

.blog-modal-body h2 {
    font-family: var(--font-main);
    font-size: 1.6rem;
    font-weight: 800;
    line-height: 1.3;
    margin-top: 8px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.blog-modal-image {
    width: 100%;
    height: 280px;
    border-radius: var(--radius);
    object-fit: cover;
    margin-bottom: 24px;
}

.blog-modal-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 16px;
}

.blog-modal-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.blog-modal-text p {
    margin-bottom: 16px;
}


/* ===== CASE STUDIES ===== */
.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.case-study-card {
    display: flex;
    flex-direction: column;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    cursor: default;
    position: relative;
}

.case-study-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    background: linear-gradient(135deg, rgba(0,86,179,0.3), transparent) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition);
}

.case-study-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 60px rgba(0,0,0,0.4), 0 0 0 1px rgba(0,86,179,0.2);
}

.case-study-card:hover::after { opacity: 1; }

.cs-card-icon {
    background: linear-gradient(135deg, var(--steel-blue), var(--steel-mid));
    padding: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.8rem;
    color: rgba(255,255,255,0.15);
    position: relative;
}

.cs-card-icon::after {
    content: attr(data-icon);
    font-family: var(--font-main);
}

.case-study-card:hover .cs-card-icon {
    background: linear-gradient(135deg, rgba(0,86,179,0.2), var(--steel-blue));
}

.case-study-card:hover .cs-card-icon i {
    color: rgba(0,86,179,0.5);
}

.cs-card-content {
    padding: 24px;
    flex: 1;
}

.cs-type {
    display: inline-block;
    background: rgba(0,86,179,0.1);
    color: var(--primary-light);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.cs-card-content h3 {
    font-family: var(--font-main);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
}

.cs-location {
    font-size: 0.78rem;
    color: var(--accent);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.cs-card-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.cs-card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.cs-download {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--primary-light);
    display: flex;
    align-items: center;
    gap: 6px;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: color var(--transition);
}

.cs-download:hover {
    color: var(--primary-dark);
}

/* ===== TECHNICAL INFO ===== */
.tech-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.tech-card {
    display: flex;
    flex-direction: column;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    cursor: pointer;
}

.tech-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4), var(--shadow-glow);
    border-color: rgba(0,86,179,0.3);
}

.tech-card-visual {
    padding: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.high-strength { background: linear-gradient(135deg, #1a0a00, #3d1a00); color: rgba(244,163,0,0.6); }
.yearbook-2021 { background: linear-gradient(135deg, #001a3d, #002966); color: rgba(30,100,200,0.5); }
.yearbook-2022 { background: linear-gradient(135deg, #0a001a, #1a0033); color: rgba(100,30,200,0.5); }
.consumption { background: linear-gradient(135deg, #001a0a, #003320); color: rgba(30,200,80,0.5); }

.tech-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tech-tag {
    display: inline-block;
    background: rgba(244,163,0,0.1);
    color: var(--accent);
    border: 1px solid rgba(244,163,0,0.2);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.tech-card-body h3 {
    font-family: var(--font-main);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.35;
}

.tech-card-body p {
    font-size: 0.86rem;
    color: var(--text-secondary);
    line-height: 1.65;
    flex: 1;
    margin-bottom: 16px;
}

.tech-card-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid var(--glass-border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.download-arrow {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: transform var(--transition);
}

.tech-card:hover .download-arrow { transform: translateY(3px); }

/* ===== STEEL SECTIONS ===== */
.manufacturers-nav {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.mfr-tab {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    background: var(--surface-2);
    border: 1.5px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 14px 22px;
    cursor: pointer;
    transition: all var(--transition);
    flex: 1;
    min-width: 150px;
}

.mfr-tab:hover {
    border-color: var(--primary);
    background: rgba(0,86,179,0.05);
}

.mfr-tab.active {
    border-color: var(--primary);
    background: rgba(0,86,179,0.1);
}

.mfr-logo-text {
    font-family: var(--font-main);
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-primary);
    display: block;
}

.mfr-tab.active .mfr-logo-text { color: var(--primary-light); }

.mfr-sub {
    font-size: 0.7rem;
    color: var(--text-muted);
    display: block;
    margin-top: 2px;
}

.mfr-content {
    display: none;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    animation: fade-in 0.4s ease;
}

.mfr-content.active { display: block; }

.mfr-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 28px 32px;
    border-bottom: 1px solid var(--glass-border);
    background: linear-gradient(135deg, rgba(22,33,62,0.5), transparent);
}

.mfr-badge {
    width: 56px; height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-main);
    font-size: 0.75rem;
    font-weight: 800;
    flex-shrink: 0;
}

.sail-badge { background: linear-gradient(135deg,#003087,#0057b8); color:#fff; }
.tata-badge { background: linear-gradient(135deg,#00008b,#191970); color:#fff; }
.rinl-badge { background: linear-gradient(135deg,#8b0000,#c0392b); color:#fff; }
.apl-badge  { background: linear-gradient(135deg,#ff6200,#d35400); color:#fff; }

.mfr-header h3 {
    font-family: var(--font-main);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.mfr-header p { font-size: 0.85rem; color: var(--text-secondary); }

.sections-list { padding: 20px; display: flex; flex-direction: column; gap: 10px; }

.section-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--surface-3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 16px 20px;
    transition: all var(--transition);
    cursor: default;
}

.section-item:hover {
    border-color: rgba(0,86,179,0.4);
    background: rgba(0,86,179,0.05);
    transform: translateX(4px);
}

.si-icon {
    width: 40px; height: 40px;
    background: rgba(0,86,179,0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    font-size: 0.9rem;
    flex-shrink: 0;
    transition: background var(--transition);
}

.section-item:hover .si-icon { background: rgba(0,86,179,0.2); }

.si-info { flex: 1; }

.si-plant {
    display: block;
    font-size: 0.7rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.si-name {
    font-size: 0.88rem;
    color: var(--text-primary);
    font-weight: 500;
    display: block;
}

.si-action {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary-light);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    padding: 6px 14px;
    border: 1px solid rgba(0,86,179,0.3);
    border-radius: 20px;
    transition: all var(--transition);
}

.section-item:hover .si-action {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ===== ARTICLES ===== */
.articles-search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface-2);
    border: 1.5px solid var(--glass-border);
    border-radius: 50px;
    padding: 14px 22px;
    max-width: 500px;
    margin: 0 auto 40px;
    transition: border-color var(--transition);
}

.articles-search-bar:focus-within { border-color: var(--primary); }
.articles-search-bar i { color: var(--text-muted); }
.articles-search-bar input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
}
.articles-search-bar input::placeholder { color: var(--text-muted); }

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.article-card {
    display: flex;
    flex-direction: column;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    opacity: 0;
    transition: opacity var(--transition);
}

.article-card[data-visible="false"] { display: none; }

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35);
    border-color: rgba(255,255,255,0.12);
}

.article-card:hover::before { opacity: 1; }

.article-category {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.article-category.sustainability { background: rgba(30,200,100,0.12); color: #15803d; }
.article-category.sustainability ~ * + .article-card::before { background: #22c55e; }
.article-card:has(.sustainability)::before { background: #22c55e; }

.article-category.infrastructure { background: rgba(59,130,246,0.12); color: #1d4ed8; }
.article-card:has(.infrastructure)::before { background: #3b82f6; }

.article-category.construction { background: rgba(244,163,0,0.12); color: #b45309; }
.article-card:has(.construction)::before { background: #f59e0b; }

.article-category.technical { background: rgba(0,86,179,0.12); color: #004085; }
.article-card:has(.technical)::before { background: #ef4444; }

.article-category.industry { background: rgba(168,85,247,0.12); color: #6d28d9; }
.article-card:has(.industry)::before { background: #8b5cf6; }

.article-card h3 {
    font-family: var(--font-main);
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 10px;
    flex: 1;
}

.article-card p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
}

.article-author {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 16px;
    font-style: italic;
}

.article-footer {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--primary-light);
    padding-top: 14px;
    border-top: 1px solid var(--glass-border);
    margin-top: auto;
}

.no-results {
    text-align: center;
    padding: 60px;
    color: var(--text-muted);
}
.no-results i { font-size: 2.5rem; margin-bottom: 16px; display: block; }

/* ===== CONTACT SECTION ===== */
.contact-section {
    background: linear-gradient(180deg, var(--steel-mid) 0%, var(--steel-dark) 100%);
    border-top: 1px solid var(--glass-border);
    padding-top: 80px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--glass-border);
}

.contact-logo {
    font-family: var(--font-main);
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.contact-tagline {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.contact-details { margin-bottom: 24px; display: flex; flex-direction: column; gap: 14px; }

.contact-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.contact-item > i {
    width: 36px; height: 36px;
    background: rgba(0,86,179,0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    font-size: 0.85rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item strong {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 3px;
}

.contact-item p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.contact-item p a { color: var(--primary-light); }
.contact-item p a:hover { color: var(--accent); }

.contact-socials {
    display: flex;
    gap: 10px;
}

.contact-socials a {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.contact-socials a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

.contact-links h4 {
    font-family: var(--font-main);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.contact-links ul { display: flex; flex-direction: column; gap: 10px; }

.contact-links li a {
    font-size: 0.88rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition);
}

.contact-links li a i { font-size: 0.65rem; color: var(--text-muted); }
.contact-links li a:hover { color: var(--primary-light); }
.contact-links li a:hover i { color: var(--primary-light); }

.contact-visitor h4 {
    font-family: var(--font-main);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.visitor-box {
    background: linear-gradient(135deg, rgba(30,58,95,0.06), rgba(30,58,95,0.02));
    border: 1px solid rgba(30,58,95,0.15);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 28px;
}

.visitor-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-size: 0.85rem;
    transition: background var(--transition);
}

.visitor-row:last-child { border-bottom: none; }
.visitor-row:hover { background: rgba(255,255,255,0.04); }
.visitor-row span { color: var(--text-secondary); display: flex; align-items: center; gap: 10px; }
.visitor-row span i { font-size: 0.65rem; color: var(--text-muted); }
.visitor-row strong { font-family: var(--font-main); font-size: 1rem; font-weight: 800; }

.pulse-green { color: #4ade80 !important; animation: pulse 2s ease infinite; }
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.member-cta h4 {
    font-family: var(--font-main);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.member-cta .btn { width: 100%; justify-content: center; margin-bottom: 10px; }

.member-cta p {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ===== FOOTER BOTTOM ===== */
.footer-bottom {
    padding: 20px 0;
    border-top: 1px solid var(--glass-border);
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
}

.footer-bottom-links a {
    font-size: 0.78rem;
    color: var(--text-muted);
    transition: color var(--transition);
}

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

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px; height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0,86,179,0.4);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 500;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,86,179,0.5);
}

/* ===== ANIMATIONS ===== */
@keyframes fade-in       { from { opacity: 0; } to { opacity: 1; } }
@keyframes fade-in-up    { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fade-in-down  { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }

[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate].animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .contact-grid { grid-template-columns: 1fr 1fr; }
    .contact-visitor { grid-column: span 2; }
    .blog-slide-card { flex: 0 0 calc(50% - 12px); }
}

@media (max-width: 768px) {
    .top-contact { display: none; }
    .social-links { gap: 8px; }

    .main-nav {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(255,255,255,0.97);
        backdrop-filter: blur(20px);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition);
        z-index: 998;
    }
    .main-nav.open { opacity: 1; pointer-events: all; }
    .nav-list { flex-direction: column; gap: 8px; text-align: center; }
    .nav-link { font-size: 1.1rem; padding: 14px 28px; }
    .hamburger { display: flex; z-index: 999; }

    .section-tabs-wrapper { top: 68px; }
    .hero-title { font-size: clamp(2rem, 8vw, 3.2rem); }
    .hero-stats { gap: 28px; }
    .stat-num { font-size: 1.8rem; }
    .advantages-grid { grid-template-columns: 1fr 1fr; }
    .case-stats-row { gap: 12px; }
    .contact-grid { grid-template-columns: 1fr; }
    .contact-visitor { grid-column: auto; }
    .footer-bottom-inner { flex-direction: column; text-align: center; }
    .manufacturers-nav { flex-direction: column; }
    .mfr-tab { min-width: auto; }
    .hero-cta { flex-direction: column; align-items: center; }
    .sfrc-grid { grid-template-columns: 1fr; }
    
    .blog-slide-card { flex: 0 0 100%; }
    .carousel-wrapper { padding: 0 20px; }
    .carousel-nav { display: none; }
}

@media (max-width: 480px) {
    .advantages-grid { grid-template-columns: 1fr; }
    .case-studies-grid { grid-template-columns: 1fr; }
    .tech-info-grid { grid-template-columns: 1fr; }
    .articles-grid { grid-template-columns: 1fr; }
    .hero-stats { flex-direction: column; gap: 20px; }
    .case-stat { padding: 12px; }
    .case-stat-num { font-size: 1.3rem; }
}

/* ===== JOURNAL SPECIFIC STYLES ===== */
.journal-text-block {
    background: var(--surface);
    padding: 30px 40px;
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.editors-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.editor-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    background: var(--surface-2);
    border: 1.5px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 14px 22px;
    transition: all var(--transition);
    min-width: 250px;
    flex: 1 1 auto;
}

.editor-card:hover {
    border-color: var(--primary);
    background: rgba(0,86,179,0.05);
}

.editor-card h3 {
    font-family: var(--font-main);
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 2px;
    margin-top: 2px;
}

.editor-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 2px;
}

.editor-role {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0px;
    letter-spacing: normal;
    text-transform: none;
}

.editor-location {
    font-size: 0.8rem !important;
    color: var(--text-muted) !important;
    margin-bottom: 2px;
}

@media (max-width: 768px) {
    .journal-text-block { padding: 20px; }
    .editors-grid { flex-direction: column; }
}