/* ==========================================================================
   SERVICES & SUBPAGES CSS — HTD Steel (/dich-vu-cung-cap/ and subpages)
   Conditional load: when viewing /dich-vu-cung-cap/ or its subpages
   Uses design tokens from :root in style.css
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. HERO SECTION
   -------------------------------------------------------------------------- */
.htd-services-hero {
    position: relative;
    background: linear-gradient(135deg, var(--htd-navy) 0%, var(--htd-navy-light) 50%, var(--htd-primary-dark) 100%);
    padding: 64px 0 54px;
    overflow: hidden;
    text-align: center;
    color: #ffffff;
}

.htd-services-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 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='%23ffffff' fill-opacity='0.03'%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");
    opacity: 1;
    pointer-events: none;
}

.htd-services-hero::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 36px;
    background: var(--htd-bg);
    clip-path: ellipse(55% 100% at 50% 100%);
}

.htd-services-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--htd-space-6);
}

.htd-services-hero__breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: var(--htd-text-sm);
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: var(--htd-space-4);
    flex-wrap: wrap;
    justify-content: center;
}

.htd-services-hero__breadcrumb a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    transition: var(--htd-transition-fast);
}

.htd-services-hero__breadcrumb a:hover {
    color: var(--htd-primary-light);
}

.htd-services-hero__breadcrumb svg {
    width: 14px;
    height: 14px;
    opacity: 0.5;
}

.htd-services-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(120, 210, 247, 0.14);
    border: 1px solid rgba(120, 210, 247, 0.35);
    color: var(--htd-primary-light);
    font-size: var(--htd-text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 6px 14px;
    border-radius: var(--htd-radius-full);
    margin-bottom: var(--htd-space-4);
}

.htd-services-hero h1 {
    font-size: clamp(1.85rem, 3.8vw, 2.75rem);
    font-weight: 700;
    line-height: var(--htd-leading-tight);
    color: #ffffff;
    margin: 0 0 var(--htd-space-4);
    letter-spacing: -0.02em;
}

.htd-services-hero h1 span {
    color: var(--htd-primary-light);
}

.htd-services-hero__subtitle {
    font-size: var(--htd-text-base);
    line-height: var(--htd-leading-relaxed);
    color: rgba(255, 255, 255, 0.88);
    margin: 0 auto var(--htd-space-6);
    max-width: 780px;
}

.htd-services-hero__actions {
    display: inline-flex;
    align-items: center;
    gap: var(--htd-space-3);
    flex-wrap: wrap;
    justify-content: center;
}

/* --------------------------------------------------------------------------
   2. BUTTONS (B2B Engineering Style)
   -------------------------------------------------------------------------- */
.htd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: var(--htd-text-sm);
    font-weight: 600;
    border-radius: var(--htd-radius-md);
    text-decoration: none;
    transition: all var(--htd-transition-fast);
    cursor: pointer;
    line-height: 1.4;
    border: 1px solid transparent;
}

.htd-btn svg {
    width: 16px;
    height: 16px;
    transition: transform var(--htd-transition-fast);
}

.htd-btn--primary {
    background: var(--htd-primary);
    color: #ffffff !important;
    border-color: var(--htd-primary);
    box-shadow: 0 2px 8px rgba(7, 116, 187, 0.3);
}

.htd-btn--primary:hover {
    background: var(--htd-primary-dark);
    border-color: var(--htd-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(7, 116, 187, 0.4);
    color: #ffffff !important;
}

.htd-btn--primary:hover svg {
    transform: translateX(3px);
}

.htd-btn--outline {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(4px);
}

.htd-btn--outline:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: #ffffff;
    color: #ffffff !important;
}

.htd-btn--secondary-solid {
    background: var(--htd-surface);
    color: var(--htd-navy) !important;
    border-color: var(--htd-border);
    box-shadow: var(--htd-shadow-xs);
}

.htd-btn--secondary-solid:hover {
    background: var(--htd-muted);
    border-color: var(--htd-border-hover);
    color: var(--htd-primary) !important;
}

/* --------------------------------------------------------------------------
   3. SUB-NAVIGATION TAB BAR
   -------------------------------------------------------------------------- */
.htd-services-nav-wrapper {
    background: var(--htd-surface);
    border-bottom: 1px solid var(--htd-border);
    position: sticky;
    top: 0;
    z-index: var(--htd-z-sticky, 90);
    box-shadow: var(--htd-shadow-sm);
}

.htd-services-nav {
    display: flex;
    align-items: center;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 var(--htd-space-4);
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.htd-services-nav::-webkit-scrollbar {
    display: none;
}

.htd-services-nav__item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 18px;
    font-size: var(--htd-text-sm);
    font-weight: 500;
    color: var(--htd-muted-fg);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all var(--htd-transition-fast);
    flex-shrink: 0;
}

.htd-services-nav__item:hover {
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
}

.htd-services-nav__item.is-active {
    color: var(--htd-primary);
    font-weight: 600;
    border-bottom-color: var(--htd-primary);
    background: var(--htd-primary-subtle);
}

/* --------------------------------------------------------------------------
   4. LAYOUT CONTAINERS & SECTION HEADERS
   -------------------------------------------------------------------------- */
.htd-services-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 var(--htd-space-5);
}

.htd-section {
    padding: 60px 0;
}

.htd-section--alt {
    background: var(--htd-bg);
    border-top: 1px solid var(--htd-border);
    border-bottom: 1px solid var(--htd-border);
}

.htd-section__header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 40px;
}

.htd-section__badge {
    display: inline-block;
    font-size: var(--htd-text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--htd-primary);
    margin-bottom: var(--htd-space-2);
}

.htd-section__title {
    font-size: clamp(1.5rem, 2.8vw, 2.1rem);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-3);
    line-height: var(--htd-leading-tight);
}

.htd-section__desc {
    font-size: var(--htd-text-base);
    color: var(--htd-muted-fg);
    line-height: var(--htd-leading-relaxed);
    margin: 0;
}

/* --------------------------------------------------------------------------
   5. HUB PAGE: 4 CORE SERVICE PILLARS
   -------------------------------------------------------------------------- */
.htd-pillars-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--htd-space-6);
    margin-bottom: var(--htd-space-6);
}

@media (max-width: 860px) {
    .htd-pillars-grid {
        grid-template-columns: 1fr;
    }
}

.htd-pillar-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--htd-shadow-xs);
    transition: all var(--htd-transition-base);
}

.htd-pillar-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--htd-shadow-md);
    border-color: var(--htd-primary-light);
}

.htd-pillar-card__media {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--htd-muted);
}

.htd-pillar-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.htd-pillar-card:hover .htd-pillar-card__media img {
    transform: scale(1.04);
}

.htd-pillar-card__badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(4px);
    color: #ffffff;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: var(--htd-radius-full);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.htd-pillar-card__body {
    padding: var(--htd-space-6);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.htd-pillar-card__title {
    font-size: var(--htd-text-xl);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-3);
    line-height: 1.3;
}

.htd-pillar-card__title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--htd-transition-fast);
}

.htd-pillar-card__title a:hover {
    color: var(--htd-primary);
}

.htd-pillar-card__desc {
    font-size: var(--htd-text-sm);
    color: var(--htd-secondary);
    line-height: var(--htd-leading-normal);
    margin: 0 0 var(--htd-space-4);
}

.htd-pillar-card__deliverables {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--htd-space-6);
    border-top: 1px solid var(--htd-border);
    padding-top: var(--htd-space-4);
    flex-grow: 1;
}

.htd-pillar-card__deliverables li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: var(--htd-text-sm);
    color: var(--htd-muted-fg);
    margin-bottom: 8px;
    line-height: 1.4;
}

.htd-pillar-card__deliverables svg {
    width: 16px;
    height: 16px;
    color: var(--htd-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.htd-pillar-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--htd-space-4);
    border-top: 1px solid var(--htd-border);
}

.htd-pillar-card__cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--htd-text-sm);
    font-weight: 600;
    color: var(--htd-primary);
    text-decoration: none;
    transition: var(--htd-transition-fast);
}

.htd-pillar-card__cta svg {
    width: 14px;
    height: 14px;
    transition: transform var(--htd-transition-fast);
}

.htd-pillar-card__cta:hover {
    color: var(--htd-primary-dark);
}

.htd-pillar-card__cta:hover svg {
    transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   6. STANDARDS & ENGINEERING SPECIFICATIONS BLOCK
   -------------------------------------------------------------------------- */
.htd-standards-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--htd-space-4);
}

@media (max-width: 900px) {
    .htd-standards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 540px) {
    .htd-standards-grid {
        grid-template-columns: 1fr;
    }
}

.htd-standard-item {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-md);
    padding: var(--htd-space-5);
    text-align: center;
    transition: var(--htd-transition-fast);
}

.htd-standard-item:hover {
    border-color: var(--htd-primary-light);
    box-shadow: var(--htd-shadow-sm);
}

.htd-standard-item__tag {
    display: inline-block;
    font-family: var(--htd-font-mono, monospace);
    font-size: var(--htd-text-xs);
    font-weight: 600;
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
    padding: 4px 10px;
    border-radius: var(--htd-radius-sm);
    margin-bottom: var(--htd-space-2);
}

.htd-standard-item__title {
    font-size: var(--htd-text-base);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 6px;
}

.htd-standard-item__desc {
    font-size: var(--htd-text-xs);
    color: var(--htd-muted-fg);
    margin: 0;
    line-height: 1.4;
}

/* --------------------------------------------------------------------------
   7. 5-STEP ENGINEERING WORKFLOW
   -------------------------------------------------------------------------- */
.htd-workflow-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--htd-space-3);
    position: relative;
}

@media (max-width: 1024px) {
    .htd-workflow-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--htd-space-4);
    }
}

@media (max-width: 640px) {
    .htd-workflow-grid {
        grid-template-columns: 1fr;
    }
}

.htd-workflow-step {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-md);
    padding: var(--htd-space-5) var(--htd-space-4);
    position: relative;
    display: flex;
    flex-direction: column;
}

.htd-workflow-step__num {
    font-family: var(--htd-font-mono, monospace);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--htd-primary-light);
    line-height: 1;
    margin-bottom: var(--htd-space-3);
}

.htd-workflow-step__title {
    font-size: var(--htd-text-sm);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 8px;
    line-height: 1.3;
}

.htd-workflow-step__desc {
    font-size: var(--htd-text-xs);
    color: var(--htd-muted-fg);
    margin: 0;
    line-height: 1.5;
}

/* --------------------------------------------------------------------------
   8. SUBPAGES: 2-COLUMN INTRO & OVERVIEW
   -------------------------------------------------------------------------- */
.htd-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 50px;
}

@media (max-width: 900px) {
    .htd-detail-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

.htd-detail-content h2 {
    font-size: clamp(1.4rem, 2.5vw, 1.85rem);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-4);
    line-height: 1.3;
}

.htd-detail-content p {
    font-size: var(--htd-text-base);
    color: var(--htd-secondary);
    line-height: var(--htd-leading-relaxed);
    margin-bottom: var(--htd-space-4);
}

.htd-detail-media {
    position: relative;
    border-radius: var(--htd-radius-lg);
    overflow: hidden;
    box-shadow: var(--htd-shadow-md);
    border: 1px solid var(--htd-border);
}

.htd-detail-media img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.htd-detail-media__caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9) 0%, transparent 100%);
    color: #ffffff;
    padding: 24px 16px 12px;
    font-size: var(--htd-text-xs);
    font-weight: 500;
}

/* --------------------------------------------------------------------------
   9. DELIVERABLES / CARDS GRID
   -------------------------------------------------------------------------- */
.htd-cards-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--htd-space-5);
}

@media (max-width: 900px) {
    .htd-cards-3col {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .htd-cards-3col {
        grid-template-columns: 1fr;
    }
}

.htd-info-card {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-md);
    padding: var(--htd-space-6);
    box-shadow: var(--htd-shadow-xs);
    transition: all var(--htd-transition-fast);
}

.htd-info-card:hover {
    border-color: var(--htd-primary);
    box-shadow: var(--htd-shadow-sm);
    transform: translateY(-2px);
}

.htd-info-card__icon {
    width: 44px;
    height: 44px;
    border-radius: var(--htd-radius-md);
    background: var(--htd-primary-subtle);
    color: var(--htd-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--htd-space-4);
}

.htd-info-card__icon svg {
    width: 22px;
    height: 22px;
}

.htd-info-card__title {
    font-size: var(--htd-text-lg);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-2);
}

.htd-info-card__desc {
    font-size: var(--htd-text-sm);
    color: var(--htd-muted-fg);
    line-height: var(--htd-leading-normal);
    margin: 0;
}

/* --------------------------------------------------------------------------
   10. MODULES / SYLLABUS ACCORDION / GRID (Đào Tạo)
   -------------------------------------------------------------------------- */
.htd-modules-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--htd-space-5);
}

@media (max-width: 768px) {
    .htd-modules-grid {
        grid-template-columns: 1fr;
    }
}

.htd-module-box {
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    border-radius: var(--htd-radius-md);
    padding: var(--htd-space-6);
    box-shadow: var(--htd-shadow-xs);
}

.htd-module-box__badge {
    display: inline-block;
    font-family: var(--htd-font-mono, monospace);
    font-size: 11px;
    font-weight: 700;
    color: var(--htd-primary);
    background: var(--htd-primary-subtle);
    padding: 3px 8px;
    border-radius: var(--htd-radius-sm);
    margin-bottom: var(--htd-space-2);
}

.htd-module-box__title {
    font-size: var(--htd-text-base);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-3);
}

.htd-module-box__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.htd-module-box__list li {
    font-size: var(--htd-text-sm);
    color: var(--htd-secondary);
    margin-bottom: 6px;
    padding-left: 16px;
    position: relative;
    line-height: 1.4;
}

.htd-module-box__list li::before {
    content: '•';
    color: var(--htd-primary);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* --------------------------------------------------------------------------
   11. LICENSE / CERTIFICATE SHOWCASE (Thiết Kế)
   -------------------------------------------------------------------------- */
.htd-license-showcase {
    background: linear-gradient(135deg, var(--htd-primary-subtle) 0%, #ffffff 100%);
    border: 1px solid var(--htd-primary-lighter);
    border-radius: var(--htd-radius-lg);
    padding: var(--htd-space-8);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 50px;
}

@media (max-width: 860px) {
    .htd-license-showcase {
        grid-template-columns: 1fr;
        padding: var(--htd-space-6);
        gap: 24px;
    }
}

.htd-license-info h3 {
    font-size: var(--htd-text-xl);
    font-weight: 700;
    color: var(--htd-navy);
    margin: 0 0 var(--htd-space-3);
}

.htd-license-info p {
    font-size: var(--htd-text-sm);
    color: var(--htd-secondary);
    line-height: var(--htd-leading-relaxed);
    margin-bottom: var(--htd-space-4);
}

.htd-license-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.htd-license-badge-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--htd-surface);
    border: 1px solid var(--htd-border);
    padding: 6px 12px;
    border-radius: var(--htd-radius-full);
    font-size: var(--htd-text-xs);
    font-weight: 600;
    color: var(--htd-navy);
}

.htd-license-badge-item svg {
    color: var(--htd-success);
    width: 14px;
    height: 14px;
}

.htd-license-thumbs {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.htd-license-thumb {
    background: #ffffff;
    padding: 8px;
    border-radius: var(--htd-radius-md);
    box-shadow: var(--htd-shadow-sm);
    border: 1px solid var(--htd-border);
    max-width: 180px;
}

.htd-license-thumb img {
    width: 100%;
    height: auto;
    display: block;
}

/* --------------------------------------------------------------------------
   12. ENGINEERING CTA BANNER (Footer Pre-CTA)
   -------------------------------------------------------------------------- */
.htd-services-cta {
    background: linear-gradient(135deg, var(--htd-navy) 0%, var(--htd-navy-light) 60%, var(--htd-primary-dark) 100%);
    padding: 64px 0;
    color: #ffffff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.htd-services-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(120, 210, 247, 0.12) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
}

.htd-services-cta__inner {
    position: relative;
    z-index: 1;
    max-width: 760px;
    margin: 0 auto;
    padding: 0 var(--htd-space-5);
}

.htd-services-cta__badge {
    display: inline-block;
    font-size: var(--htd-text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--htd-primary-light);
    margin-bottom: var(--htd-space-2);
}

.htd-services-cta h2 {
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 var(--htd-space-3);
    line-height: 1.25;
}

.htd-services-cta p {
    font-size: var(--htd-text-base);
    color: rgba(255, 255, 255, 0.85);
    margin: 0 auto var(--htd-space-6);
    line-height: var(--htd-leading-relaxed);
}

.htd-services-cta__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--htd-space-4);
    flex-wrap: wrap;
}

.htd-services-cta__phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
    font-size: var(--htd-text-base);
    font-weight: 600;
    text-decoration: none;
    padding: 10px 18px;
    border-radius: var(--htd-radius-md);
    background: rgba(255, 255, 255, 0.1);
    transition: var(--htd-transition-fast);
}

.htd-services-cta__phone:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--htd-primary-light);
}

.htd-services-cta__phone svg {
    width: 18px;
    height: 18px;
    color: var(--htd-primary-light);
}