@charset "UTF-8";

:root {
    --cert-bg-white: #ffffff;
    --cert-bg-light: #fbf9f6;
    --cert-bg-card-hover: #f5f2ec;

    --cert-text-primary: #171615;
    --cert-text-secondary: #54514d;
    --cert-text-muted: #9c9790;

    --cert-border-line: #eeedea;
    --cert-border-strong: #dedad2;
    --cert-point: #94684c;
    --cert-point-hover: #785036;

    --cert-transition: 0.26s 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: 1720px;
    margin: 0 auto;
    padding: 0 3.5rem;
    box-sizing: border-box;
}

.reveal-element {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s 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: 56vh;
    min-height: 480px;
    width: 100%;
    background-color: #171615;
    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/hero_02.png');
    background-size: cover;
    background-position: center;
    transform: scale(1.03);
    animation: heroZoom 10s ease-out forwards;
}

@keyframes heroZoom {
    0% { transform: scale(1.08); }
    100% { transform: scale(1); }
}

.hero-overlay-filter {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(23, 22, 21, 0.45) 0%, rgba(23, 22, 21, 0.82) 100%);
    pointer-events: none;
}

.cert-hero-inner {
    position: relative;
    z-index: 5;
    padding-top: 3.5rem;
}

.eng-sub-badge {
    font-family: 'Cinzel', serif;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.28em;
    color: #dfd3c3;
    display: block;
    margin-bottom: 1.1rem;
    text-transform: uppercase;
}

.cert-hero-title {
    font-family: 'Noto Serif KR', serif;
    font-size: clamp(2.8rem, 5.2vw, 4.4rem);
    font-weight: 700;
    margin: 0 0 1.2rem 0;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: #ffffff;
}

.solid-white {
    color: #ffffff;
}

.certificate-hero-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.88);
    max-width: 680px;
    line-height: 1.8;
    margin: 0 0 1.8rem 0;
    word-break: keep-all;
}

.hero-watermark-code {
    font-family: 'Cinzel', serif;
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   2. GLOBAL STANDARDS & QUALITY MANAGEMENT
   ========================================================================== */
.cert-standards-section {
    padding: 130px 0;
    background-color: var(--cert-bg-white);
    border-bottom: 1px solid var(--cert-border-line);
}

.section-lead-header {
    margin-bottom: 65px;
    border-left: 2px solid var(--cert-point);
    padding-left: 1.8rem;
}

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

.section-lead-tag {
    font-family: 'Cinzel', serif;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.24em;
    color: var(--cert-point);
    display: block;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.section-lead-title {
    font-family: 'Noto Serif KR', serif;
    font-size: clamp(2rem, 3vw, 2.6rem);
    font-weight: 700;
    color: var(--cert-text-primary);
    margin: 0 0 0.9rem 0;
    line-height: 1.3;
    letter-spacing: -0.03em;
}

.section-lead-sub-desc {
    font-size: 1.02rem;
    font-weight: 400;
    color: var(--cert-text-secondary);
    margin: 0;
    letter-spacing: -0.01em;
}

.section-lead-desc {
    font-size: 1rem;
    color: var(--cert-text-secondary);
    max-width: 780px;
    margin: 0 auto;
    line-height: 1.8;
    word-break: keep-all;
}

.standards-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.std-card {
    background: var(--cert-bg-white);
    border: 1px solid var(--cert-border-line);
    padding: 2.8rem 2.4rem;
    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:hover {
    border-color: var(--cert-border-strong);
    box-shadow: 0 16px 40px rgba(23, 22, 21, 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: 1.2rem;
    margin-bottom: 2rem;
}

.std-badge {
    font-family: 'Cinzel', serif;
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--cert-point);
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.std-num {
    font-family: 'Cinzel', serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--cert-text-muted);
}

.std-card-body-flex {
    display: flex;
    align-items: flex-start;
    gap: 24px;
}

.std-logo-mark-wrap {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
    background: var(--cert-bg-light);
    border: 1px solid var(--cert-border-strong);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cert-point);
}

.std-mark-svg {
    width: 32px;
    height: 32px;
}

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

.std-title {
    font-family: 'Noto Serif KR', serif;
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--cert-text-primary);
    margin: 0 0 6px 0;
    letter-spacing: -0.02em;
}

.std-sub-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--cert-point);
    margin: 0 0 12px 0;
    line-height: 1.4;
}

.std-desc {
    font-size: 0.92rem;
    color: var(--cert-text-secondary);
    line-height: 1.75;
    margin: 0;
    word-break: keep-all;
}

/* ==========================================================================
   3. CERTIFICATE GALLERY GRID
   ========================================================================== */
.patent-grid-section {
    padding: 130px 0 140px;
    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: 36px;
}

.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 16px 40px rgba(23, 22, 21, 0.06);
    transform: translateY(-6px);
}

.patent-img-holder {
    width: 100%;
    aspect-ratio: 1 / 1.35;
    background: #ffffff;
    border-bottom: 1px solid var(--cert-border-line);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.8rem;
    box-sizing: border-box;
}

.patent-img-holder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.patent-card-item:hover .patent-img-holder img {
    transform: scale(1.04);
}

.patent-idx-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--cert-point);
    color: #ffffff;
    font-family: 'Cinzel', serif;
    font-size: 0.74rem;
    font-weight: 700;
    padding: 3px 8px;
    z-index: 2;
}

.patent-info-box {
    padding: 1.8rem 1.8rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--cert-bg-white);
}

.patent-category {
    font-family: 'Cinzel', serif;
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--cert-point);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.patent-item-title {
    font-family: 'Noto Serif KR', serif;
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--cert-text-primary);
    margin: 0;
    line-height: 1.45;
    word-break: keep-all;
}

.patent-item-org {
    font-size: 0.86rem;
    color: var(--cert-text-muted);
    margin: 4px 0 0 0;
}

/* ==========================================================================
   4. QUALITY ASSURANCE PROCESS
   ========================================================================== */
.cert-qa-process-section {
    padding: 140px 0 150px;
    background-color: var(--cert-bg-white);
}

.qa-steps-matrix {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 60px;
    margin-bottom: 75px;
}

.qa-step-box {
    background: var(--cert-bg-white);
    border: 1px solid var(--cert-border-line);
    border-top: 2px solid var(--cert-point);
    padding: 2.6rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 12px;
    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(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.04);
}

.step-num {
    font-family: 'Cinzel', serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--cert-point);
    letter-spacing: 0.12em;
}

.step-name {
    font-family: 'Noto Serif KR', serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cert-text-primary);
    margin: 0;
}

.step-desc {
    font-size: 0.9rem;
    color: var(--cert-text-secondary);
    line-height: 1.7;
    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-point);
    padding: 3.2rem 4rem;
}

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

.banner-text h3 {
    font-family: 'Noto Serif KR', serif;
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--cert-text-primary);
    margin: 0 0 8px 0;
    letter-spacing: -0.02em;
}

.banner-text p {
    font-size: 0.96rem;
    color: var(--cert-text-secondary);
    margin: 0;
    word-break: keep-all;
}

.btn-cert-contact {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: var(--cert-text-primary);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    border: 1px solid var(--cert-text-primary);
    transition: background-color var(--cert-transition), border-color var(--cert-transition), transform var(--cert-transition);
}

.btn-cert-contact:hover {
    background: var(--cert-point);
    border-color: var(--cert-point);
    transform: translateY(-2px);
}

/* [반응형 안정화] 긴 텍스트/그리드/이미지 오버플로 방지 */
.standards-cards-grid,
.patent-gallery-grid,
.qa-steps-matrix,
.std-card,
.patent-card-item,
.qa-step-box,
.std-content-text,
.banner-text {
    min-width: 0;
}

.patent-img-holder img {
    display: block;
    max-width: 100%;
}

.std-badge,
.section-lead-tag,
.hero-watermark-code,
.patent-category,
.step-num {
    overflow-wrap: anywhere;
}


/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   메인/기업소개 페이지와 동일한 분기 기준
   - Large: 1440px 이상
   - Desktop/Laptop: 1024px ~ 1439px
   - Tablet: 768px ~ 1023px
   - Mobile: 767px 이하
   - Small Mobile: 479px 이하
   ========================================================================== */

/* 1. Large Screens (>= 1440px) */
@media (min-width: 1440px) {
    .max-layout-width {
        padding-left: 4rem;
        padding-right: 4rem;
    }
}

/* 2. Laptop & Desktop (1024px ~ 1439px) */
@media (max-width: 1439px) and (min-width: 1024px) {
    .max-layout-width {
        padding-left: 2.5rem;
        padding-right: 2.5rem;
    }

    .certificate-hero {
        height: 54vh;
        min-height: 440px;
    }

    .cert-hero-inner {
        padding-top: 3rem;
    }

    .certificate-hero-desc {
        max-width: 640px;
        font-size: 1rem;
    }

    .cert-standards-section,
    .patent-grid-section,
    .cert-qa-process-section {
        padding-top: 105px;
        padding-bottom: 110px;
    }

    .section-lead-header {
        margin-bottom: 50px;
    }

    .standards-cards-grid {
        gap: 22px;
    }

    .std-card {
        padding: 2.2rem 1.8rem;
    }

    .std-card-body-flex {
        flex-direction: column;
        gap: 18px;
    }

    .std-logo-mark-wrap {
        width: 58px;
        height: 58px;
    }

    .std-title {
        font-size: 1.3rem;
    }

    .patent-gallery-grid {
        gap: 24px;
    }

    .patent-info-box {
        padding: 1.6rem 1.5rem 1.8rem;
    }

    .qa-steps-matrix {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 18px;
        margin-top: 50px;
        margin-bottom: 60px;
    }

    .qa-step-box {
        padding: 2.2rem 1.8rem;
    }

    .cert-bottom-brand-banner {
        padding: 2.7rem 3rem;
    }
}

/* 3. Tablet Landscape & Portrait (768px ~ 1023px) */
@media (max-width: 1023px) and (min-width: 768px) {
    .max-layout-width {
        padding-left: 2rem;
        padding-right: 2rem;
    }

    .certificate-hero {
        height: 50vh;
        min-height: 400px;
    }

    .cert-hero-inner {
        padding-top: 2.5rem;
    }

    .eng-sub-badge {
        font-size: 0.8rem;
        letter-spacing: 0.22em;
    }

    .cert-hero-title {
        font-size: 3rem;
    }

    .certificate-hero-desc {
        max-width: 620px;
        font-size: 0.96rem;
    }

    .cert-standards-section,
    .patent-grid-section,
    .cert-qa-process-section {
        padding-top: 85px;
        padding-bottom: 90px;
    }

    .section-lead-header {
        margin-bottom: 44px;
        padding-left: 1.4rem;
    }

    .section-lead-title {
        font-size: 2rem;
    }

    .standards-cards-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .std-card {
        padding: 2.2rem;
    }

    .std-card-body-flex {
        align-items: center;
    }

    .patent-gallery-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 20px;
    }

    .patent-img-holder {
        padding: 1.4rem;
    }

    .qa-steps-matrix {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 18px;
        margin-top: 45px;
        margin-bottom: 52px;
    }

    .banner-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 22px;
    }

    .cert-bottom-brand-banner {
        padding: 2.4rem 2.5rem;
    }

    .btn-cert-contact {
        min-width: 230px;
        justify-content: center;
    }
}

/* 4. Mobile Devices (<= 767px) */
@media (max-width: 767px) {
    .max-layout-width {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    .certificate-hero {
        height: 48vh;
        min-height: 370px;
        text-align: center;
    }

    .certificate-hero-bg {
        background-position: center center;
    }

    .cert-hero-inner {
        padding-top: 2rem;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .eng-sub-badge {
        font-size: 0.72rem;
        line-height: 1.5;
        letter-spacing: 0.18em;
        margin-bottom: 0.8rem;
    }

    .cert-hero-title {
        font-size: 2.45rem;
        margin-bottom: 1rem;
    }

    .certificate-hero-desc {
        max-width: 540px;
        font-size: 0.92rem;
        line-height: 1.75;
        margin-bottom: 1.4rem;
    }

    .hero-watermark-code {
        font-size: 0.66rem;
        line-height: 1.5;
        letter-spacing: 0.16em;
    }

    .cert-standards-section,
    .patent-grid-section,
    .cert-qa-process-section {
        padding-top: 68px;
        padding-bottom: 72px;
    }

    .section-lead-header {
        margin-bottom: 36px;
        padding-left: 1rem;
    }

    .section-lead-header.center-align {
        padding-left: 0;
    }

    .section-lead-tag {
        font-size: 0.72rem;
        line-height: 1.5;
        letter-spacing: 0.16em;
    }

    .section-lead-title {
        font-size: 1.7rem;
        line-height: 1.4;
    }

    .section-lead-sub-desc,
    .section-lead-desc {
        font-size: 0.9rem;
        line-height: 1.7;
        word-break: keep-all;
    }

    .standards-cards-grid,
    .patent-gallery-grid,
    .qa-steps-matrix {
        grid-template-columns: 1fr;
    }

    .standards-cards-grid {
        gap: 16px;
    }

    .std-card {
        padding: 1.8rem 1.5rem;
    }

    .std-card-head {
        padding-bottom: 1rem;
        margin-bottom: 1.5rem;
    }

    .std-badge {
        font-size: 0.68rem;
        letter-spacing: 0.1em;
    }

    .std-card-body-flex {
        gap: 18px;
    }

    .std-logo-mark-wrap {
        width: 56px;
        height: 56px;
    }

    .std-mark-svg {
        width: 28px;
        height: 28px;
    }

    .std-title {
        font-size: 1.25rem;
    }

    .std-sub-title {
        font-size: 0.9rem;
    }

    .std-desc {
        font-size: 0.88rem;
        line-height: 1.7;
    }

    .patent-gallery-grid {
        gap: 18px;
    }

    .patent-img-holder {
        aspect-ratio: 4 / 5;
        padding: 1.3rem;
    }

    .patent-info-box {
        padding: 1.5rem 1.4rem 1.7rem;
    }

    .patent-item-title {
        font-size: 1.08rem;
    }

    .patent-item-org {
        font-size: 0.82rem;
        line-height: 1.55;
    }

    .qa-steps-matrix {
        gap: 14px;
        margin-top: 36px;
        margin-bottom: 42px;
    }

    .qa-step-box {
        padding: 1.7rem 1.5rem;
        gap: 10px;
    }

    .step-name {
        font-size: 1.15rem;
    }

    .step-desc {
        font-size: 0.87rem;
    }

    .cert-bottom-brand-banner {
        padding: 2rem 1.6rem;
        border-left-width: 2px;
    }

    .banner-inner {
        flex-direction: column;
        align-items: stretch;
        gap: 22px;
    }

    .banner-text h3 {
        font-size: 1.35rem;
        line-height: 1.4;
    }

    .banner-text p {
        font-size: 0.9rem;
        line-height: 1.7;
    }

    .btn-cert-contact {
        width: 100%;
        justify-content: center;
        padding: 14px 18px;
        box-sizing: border-box;
        white-space: normal;
        text-align: center;
    }
}

/* 5. Small Mobile Screens (< 480px) */
@media (max-width: 479px) {
    .max-layout-width {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .certificate-hero {
        min-height: 350px;
    }

    .cert-hero-inner {
        padding-top: 1.5rem;
    }

    .eng-sub-badge {
        font-size: 0.66rem;
        letter-spacing: 0.14em;
    }

    .cert-hero-title {
        font-size: 2.1rem;
    }

    .certificate-hero-desc {
        font-size: 0.86rem;
        line-height: 1.65;
    }

    .hero-watermark-code {
        display: none;
    }

    .cert-standards-section,
    .patent-grid-section,
    .cert-qa-process-section {
        padding-top: 58px;
        padding-bottom: 62px;
    }

    .section-lead-header {
        margin-bottom: 30px;
        padding-left: 0.85rem;
    }

    .section-lead-title {
        font-size: 1.5rem;
    }

    .section-lead-sub-desc,
    .section-lead-desc {
        font-size: 0.86rem;
    }

    .std-card {
        padding: 1.5rem 1.25rem;
    }

    .std-card-body-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .std-logo-mark-wrap {
        width: 52px;
        height: 52px;
    }

    .std-title {
        font-size: 1.15rem;
    }

    .std-sub-title {
        font-size: 0.84rem;
    }

    .std-desc {
        font-size: 0.84rem;
    }

    .patent-img-holder {
        aspect-ratio: 1 / 1.2;
        padding: 1rem;
    }

    .patent-idx-badge {
        top: 10px;
        left: 10px;
        font-size: 0.68rem;
    }

    .patent-info-box {
        padding: 1.3rem 1.2rem 1.5rem;
    }

    .patent-item-title {
        font-size: 1rem;
    }

    .qa-step-box {
        padding: 1.5rem 1.25rem;
    }

    .step-num {
        font-size: 0.74rem;
    }

    .step-name {
        font-size: 1.05rem;
    }

    .step-desc {
        font-size: 0.83rem;
    }

    .cert-bottom-brand-banner {
        padding: 1.7rem 1.25rem;
    }

    .banner-text h3 {
        font-size: 1.2rem;
    }

    .banner-text p {
        font-size: 0.84rem;
    }

    .btn-cert-contact {
        font-size: 0.88rem;
        padding: 13px 14px;
    }
}

/* 모션 최소화 설정 사용자 대응 */
@media (prefers-reduced-motion: reduce) {
    .certificate-hero-bg,
    .reveal-element,
    .std-card,
    .patent-card-item,
    .patent-img-holder img,
    .qa-step-box,
    .btn-cert-contact {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }

    .reveal-element {
        opacity: 1;
        transform: none;
    }
}