@charset "UTF-8";

/* ==========================================================================
   (주)두웰이엔지 - 기술인증 (Clean Pure White & Monochrome / Max Weight 600)
   ========================================================================== */

:root {
    --cert-bg-white: #ffffff;
    --cert-bg-light: #f8f9fa;
    --cert-bg-card-hover: #f1f3f5;

    --cert-text-primary: #373a3c;
    --cert-text-secondary: #636c72;
    --cert-text-muted: #959da5;

    --cert-border-line: #dee2e6;
    --cert-border-strong: #373a3c;

    --cert-transition: 0.22s cubic-bezier(0.2, 0, 0, 1);
}

.certificate-page {
    background-color: var(--cert-bg-white) !important;
    color: var(--cert-text-primary);
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    letter-spacing: -0.02em;
    -webkit-font-smoothing: antialiased;
}

.certificate-main-container {
    background-color: var(--cert-bg-white);
}

.max-layout-width {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2.5rem;
    box-sizing: border-box;
}

.reveal-element {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1), transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ==========================================================================
   1. HERO BANNER ZONE
   ========================================================================== */
.certificate-hero {
    position: relative;
    height: 55vh;
    min-height: 460px;
    width: 100%;
    background-color: #000000;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--cert-border-line);
    overflow: hidden;
}

.certificate-hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/img/brand/cert_hero.png');
    background-size: cover;
    background-position: center;
    filter: none !important;
}

.hero-overlay-filter {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.50) 0%, rgba(0, 0, 0, 0.90) 100%);
    pointer-events: none;
}

.certificate-hero-inner {
    position: relative;
    z-index: 5;
    padding-top: 4rem;
}

.eng-sub-badge {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.35em;
    color: rgba(255, 255, 255, 0.85);
    display: block;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.certificate-hero-title {
    font-size: clamp(3rem, 5.5vw, 4.8rem);
    font-weight: 600;
    margin: 0 0 1rem 0;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: #ffffff;
}

.solid-white {
    color: #ffffff;
}

.certificate-hero-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 650px;
    line-height: 1.7;
    margin: 0 0 1.5rem 0;
    word-break: keep-all;
}

.hero-watermark-code {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   2. GLOBAL STANDARDS & QUALITY MANAGEMENT
   ========================================================================== */
.cert-standards-section {
    padding: 120px 0;
    background-color: var(--cert-bg-white);
    border-bottom: 1px solid var(--cert-border-line);
}

.section-lead-header {
    margin-bottom: 60px;
    border-left: 2px solid var(--cert-border-strong);
    padding-left: 1.5rem;
}

.section-lead-header.center-align {
    text-align: center;
    border-left: none;
    padding-left: 0;
}

.section-lead-tag {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    color: var(--cert-text-muted);
    display: block;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.section-lead-title {
    font-size: clamp(2rem, 3vw, 2.6rem);
    font-weight: 600;
    color: var(--cert-text-primary);
    margin: 0 0 0.8rem 0;
    line-height: 1.3;
    letter-spacing: -0.03em;
}

.section-lead-sub-desc {
    font-size: 1.02rem;
    font-weight: 500;
    color: var(--cert-text-secondary);
    margin: 0;
    letter-spacing: -0.01em;
}

.section-lead-desc {
    font-size: 1rem;
    color: var(--cert-text-secondary);
    max-width: 750px;
    margin: 0 auto;
    line-height: 1.7;
    word-break: keep-all;
}

.standards-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.std-card {
    background: var(--cert-bg-white);
    border: 1px solid var(--cert-border-line);
    padding: 2.5rem 2.2rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    transition: border-color var(--cert-transition), box-shadow var(--cert-transition), transform var(--cert-transition);
}

.std-card.highlight-card {
    background: var(--cert-bg-white);
}

.std-card:hover {
    border-color: var(--cert-border-strong);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.05);
    transform: translateY(-6px);
}

.std-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--cert-border-line);
    padding-bottom: 1rem;
    margin-bottom: 1.8rem;
}

.std-badge {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cert-text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.std-num {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--cert-text-muted);
}

.std-card-body-flex {
    display: flex;
    align-items: flex-start;
    gap: 22px;
}

.std-logo-mark-wrap {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    background: var(--cert-bg-light);
    border: 1px solid var(--cert-border-line);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    box-sizing: border-box;
}

.std-mark-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.std-content-text {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.std-title {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--cert-text-primary);
    margin: 0 0 6px 0;
    letter-spacing: -0.02em;
}

.std-sub-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cert-text-primary);
    margin: 0 0 10px 0;
    line-height: 1.35;
}

.std-desc {
    font-size: 0.92rem;
    color: var(--cert-text-secondary);
    line-height: 1.65;
    margin: 0;
    word-break: keep-all;
}

/* ==========================================================================
   3. PATENT & CERTIFICATE GRID
   ========================================================================== */
.patent-grid-section {
    padding: 130px 0;
    background-color: var(--cert-bg-light);
    border-bottom: 1px solid var(--cert-border-line);
}

.patent-gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.patent-card-item {
    background: var(--cert-bg-white);
    border: 1px solid var(--cert-border-line);
    display: flex;
    flex-direction: column;
    transition: border-color var(--cert-transition), box-shadow var(--cert-transition), transform var(--cert-transition);
}

.patent-card-item:hover {
    border-color: var(--cert-border-strong);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.06);
    transform: translateY(-6px);
}

.patent-img-holder {
    width: 100%;
    aspect-ratio: 1 / 1.35;
    background: #e9ecef;
    border-bottom: 1px solid var(--cert-border-line);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    box-sizing: border-box;
}

.patent-img-holder img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: none;
    transition: transform var(--cert-transition);
}

.patent-card-item:hover .patent-img-holder img {
    transform: scale(1.03);
}

.patent-idx-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--cert-border-strong);
    color: #ffffff;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 8px;
    z-index: 2;
}

.patent-info-box {
    padding: 1.5rem 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--cert-bg-white);
}

.patent-category {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cert-text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.patent-item-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--cert-text-primary);
    margin: 0;
    line-height: 1.45;
    word-break: keep-all;
}

/* ==========================================================================
   4. QUALITY ASSURANCE PROCESS
   ========================================================================== */
.cert-qa-process-section {
    padding: 140px 0;
    background-color: var(--cert-bg-white);
}

.qa-steps-matrix {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 50px;
    margin-bottom: 70px;
}

.qa-step-box {
    background: var(--cert-bg-white);
    border: 1px solid var(--cert-border-line);
    border-top: 2px solid var(--cert-border-strong);
    padding: 2.2rem 1.8rem;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: border-color var(--cert-transition), box-shadow var(--cert-transition), transform var(--cert-transition);
}

.qa-step-box:hover {
    background: var(--cert-bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

.step-num {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--cert-text-muted);
    letter-spacing: 0.1em;
}

.step-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--cert-text-primary);
    margin: 0;
}

.step-desc {
    font-size: 0.88rem;
    color: var(--cert-text-secondary);
    line-height: 1.6;
    margin: 0;
    word-break: keep-all;
}

.cert-bottom-brand-banner {
    background: var(--cert-bg-light);
    border: 1px solid var(--cert-border-line);
    border-left: 3px solid var(--cert-border-strong);
    padding: 3rem 3.5rem;
}

.banner-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.banner-text h3 {
    font-size: 1.45rem;
    font-weight: 600;
    color: var(--cert-text-primary);
    margin: 0 0 8px 0;
    letter-spacing: -0.02em;
}

.banner-text p {
    font-size: 0.95rem;
    color: var(--cert-text-secondary);
    margin: 0;
    word-break: keep-all;
}

.btn-cert-contact {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 28px;
    background: var(--cert-border-strong);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    border: 1px solid var(--cert-border-strong);
    transition: background-color var(--cert-transition), color var(--cert-transition);
}

.btn-cert-contact:hover {
    background: #ffffff;
    color: #000000;
}

/* ==========================================================================
   반응형 미디어 쿼리
   ========================================================================== */
@media (min-width: 1440px) {
    .max-layout-width {
        padding: 0 3.5rem;
    }
    .standards-cards-grid {
        gap: 30px;
    }
    .patent-gallery-grid {
        gap: 36px;
    }
    .qa-steps-matrix {
        gap: 24px;
    }
}

@media (max-width: 1439px) and (min-width: 1024px) {
    .max-layout-width {
        padding: 0 2.5rem;
    }
    .certificate-hero {
        min-height: 420px;
    }
    .cert-standards-section {
        padding: 95px 0;
    }
    .patent-grid-section {
        padding: 105px 0;
    }
    .cert-qa-process-section {
        padding: 110px 0;
    }
    .standards-cards-grid {
        gap: 18px;
    }
    .std-card {
        padding: 2.2rem 1.8rem;
    }
    .std-card-body-flex {
        gap: 16px;
    }
    .std-logo-mark-wrap {
        width: 70px;
        height: 70px;
    }
    .std-title {
        font-size: 1.35rem;
    }
    .patent-gallery-grid {
        gap: 22px;
    }
    .qa-steps-matrix {
        gap: 16px;
    }
    .qa-step-box {
        padding: 1.8rem 1.4rem;
    }
}

@media (max-width: 1023px) and (min-width: 768px) {
    .max-layout-width {
        padding: 0 2rem;
    }
    .certificate-hero {
        height: 48vh;
        min-height: 380px;
    }
    .certificate-hero-inner {
        padding-top: 3rem;
    }
    .cert-standards-section {
        padding: 80px 0;
    }
    .patent-grid-section {
        padding: 90px 0;
    }
    .cert-qa-process-section {
        padding: 95px 0;
    }
    .section-lead-header {
        margin-bottom: 45px;
    }
    .standards-cards-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }
    .std-card {
        padding: 2rem 1.8rem;
    }
    .patent-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .qa-steps-matrix {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
        margin-top: 35px;
        margin-bottom: 50px;
    }
    .cert-bottom-brand-banner {
        padding: 2.4rem 2.2rem;
    }
}

@media (max-width: 767px) {
    .max-layout-width {
        padding: 0 1.5rem;
    }
    .certificate-hero {
        height: 42vh;
        min-height: 330px;
    }
    .certificate-hero-inner {
        padding-top: 2rem;
    }
    .eng-sub-badge {
        font-size: 0.72rem;
        letter-spacing: 0.25em;
        margin-bottom: 0.7rem;
    }
    .certificate-hero-title {
        font-size: 2.4rem;
    }
    .certificate-hero-desc {
        font-size: 0.92rem;
        line-height: 1.65;
        margin-bottom: 1rem;
    }
    .hero-watermark-code {
        font-size: 0.65rem;
        letter-spacing: 0.15em;
    }
    .cert-standards-section {
        padding: 65px 0;
    }
    .patent-grid-section {
        padding: 75px 0;
    }
    .cert-qa-process-section {
        padding: 75px 0;
    }
    .section-lead-header {
        margin-bottom: 35px;
        padding-left: 1.2rem;
        border-left-width: 2px;
    }
    .section-lead-tag {
        font-size: 0.72rem;
        margin-bottom: 6px;
    }
    .section-lead-title {
        font-size: 1.7rem;
    }
    .section-lead-sub-desc {
        font-size: 0.92rem;
    }
    .section-lead-desc {
        font-size: 0.92rem;
    }
    .standards-cards-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .std-card {
        padding: 1.8rem 1.4rem;
    }
    .std-card-body-flex {
        flex-direction: column;
        gap: 14px;
    }
    .std-logo-mark-wrap {
        width: 64px;
        height: 64px;
    }
    .std-title {
        font-size: 1.3rem;
    }
    .std-sub-title {
        font-size: 0.95rem;
    }
    .std-desc {
        font-size: 0.88rem;
    }

    /* 인증서 2열 배치 */
    .patent-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .patent-img-holder {
        padding: 0.8rem;
    }
    .patent-idx-badge {
        top: 8px;
        left: 8px;
        font-size: 0.68rem;
        padding: 2px 6px;
    }
    .patent-info-box {
        padding: 1rem 0.9rem;
        gap: 4px;
    }
    .patent-category {
        font-size: 0.7rem;
    }
    .patent-item-title {
        font-size: 0.88rem;
        line-height: 1.35;
    }

    .qa-steps-matrix {
        grid-template-columns: 1fr;
        gap: 14px;
        margin-top: 30px;
        margin-bottom: 40px;
    }
    .qa-step-box {
        padding: 1.6rem 1.4rem;
    }
    .step-name {
        font-size: 1.05rem;
    }
    .step-desc {
        font-size: 0.86rem;
    }
    .cert-bottom-brand-banner {
        padding: 1.8rem 1.4rem;
    }
    .banner-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    .banner-text h3 {
        font-size: 1.25rem;
    }
    .banner-text p {
        font-size: 0.88rem;
    }
    .btn-cert-contact {
        width: 100%;
        justify-content: center;
        padding: 14px 20px;
        font-size: 0.88rem;
        box-sizing: border-box;
    }
}

@media (max-width: 479px) {
    .max-layout-width {
        padding: 0 1rem;
    }
    .certificate-hero {
        min-height: 290px;
    }
    .certificate-hero-inner {
        padding-top: 1.5rem;
    }
    .certificate-hero-title {
        font-size: 2rem;
    }
    .cert-standards-section {
        padding: 50px 0;
    }
    .patent-grid-section {
        padding: 60px 0;
    }
    .cert-qa-process-section {
        padding: 60px 0;
    }
    .section-lead-header {
        margin-bottom: 28px;
        padding-left: 1rem;
    }
    .section-lead-title {
        font-size: 1.45rem;
    }
    .std-card {
        padding: 1.5rem 1.15rem;
    }
    .std-title {
        font-size: 1.2rem;
    }

    .patent-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .patent-img-holder {
        padding: 0.6rem;
    }
    .patent-idx-badge {
        top: 6px;
        left: 6px;
        font-size: 0.62rem;
        padding: 2px 5px;
    }
    .patent-info-box {
        padding: 0.85rem 0.75rem;
    }
    .patent-category {
        font-size: 0.65rem;
    }
    .patent-item-title {
        font-size: 0.82rem;
        line-height: 1.3;
    }

    .qa-step-box {
        padding: 1.4rem 1.15rem;
    }
    .cert-bottom-brand-banner {
        padding: 1.5rem 1.15rem;
    }
    .banner-text h3 {
        font-size: 1.15rem;
    }
    .btn-cert-contact {
        padding: 12px 16px;
        font-size: 0.84rem;
    }
}