:root {
    --rnh-blue: #1A367F;
    /* Logo R Blue */
    --rnh-blue-dark: #0D1B3E;
    --rnh-gold: #FDB913;
    /* Logo N Gold */
    --white: #FFFFFF;
    --gray-light: #F1F5F9;
    /* 보조 배경색 */
    --text-dark: #0F172A;
    --text-gray: #64748B;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

body {
    font-family: 'Noto Sans', sans-serif;
    background-color: var(--white);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5 {
    font-family: 'Noto Sans', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

/* Navigation */
nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1400px;
    height: 80px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(26, 54, 127, 0.15);
    display: flex;
    align-items: center;
    padding: 0 40px;
    border: 1px solid rgba(26, 54, 127, 0.1);
}

.nav-container {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    text-decoration: none;
}

.logo {
    display: flex;
    align-items: center;
    font-family: 'Noto Sans', sans-serif;
    font-size: 24px;
    font-weight: 800;
    color: var(--rnh-blue);
    text-decoration: none;
    margin-right: 50px;
}

.logo span {
    color: var(--rnh-gold);
}

.contact-info {
    height: 100%;
}

.nav-menu a {
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 40px;
    width: 100%;
}

.menu-toggle {
    display: none;
}

.nav-item {
    display: flex;
    align-items: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition);
    text-decoration: none;
}

.nav-item:hover {
    color: var(--rnh-blue);
    transform: translateY(-2px);
}

.nav-contact {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    background: var(--rnh-blue);
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    border-radius: 10px;
    border: 2px solid var(--rnh-blue);
    transition: var(--transition);
    text-decoration: none;
    margin-left: auto;
}

.nav-contact:hover {
    background: transparent;
    color: var(--rnh-blue);
}

/* Hero (Interactive Plexus) */
#hero {
    position: relative;
    height: 100vh;
    /*background: linear-gradient(135deg, var(--rnh-blue-dark) 0%, var(--rnh-blue) 100%);*/
    background: radial-gradient(circle at center, #1b3a8a 0%, #050b1a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

#plexus-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-box {
    position: relative;
    z-index: 2;
    max-width: 1100px;
    padding: 0 20px;
}

.hero-box h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: 20px;
    background: linear-gradient(to right, #ffffff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: 'Noto Sans', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

.hero-box p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 300;
    max-width: 850px;
    margin: 0 auto;
}

/* Section Commons */
section {
    padding: 140px 10%;
    position: relative;
}

.section-tag {
    color: var(--rnh-gold);
    font-weight: 800;
    font-size: 18px;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 5px;
    display: block;
    text-indent: 5px;
}

.section-title {
    font-family: 'Noto Sans', sans-serif;
    font-size: 3rem;
    color: var(--rnh-blue);
    margin-bottom: 60px;
    line-height: 1.2;
}

.section-title.white {
    color: var(--white);
}

.section-title-nomargin {
    margin-bottom: 0 !important;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-gray);
    margin-top: 10px;
    margin-bottom: 60px;
    font-weight: 200;
    text-indent: 5px;

}

/* 1. Who We Are (White) */
#about {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 30px;
}

/* 2. RNH Partners by the Numbers (Gray) */
#numbers {
    background: var(--rnh-blue-dark);
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.stat-card {
    background: var(--white);
    padding: 70px 40px;
    border-radius: 30px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.05);
}

.stat-card h3 {
    font-size: 6.5rem;
    font-weight: 800;
    color: var(--rnh-blue);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 1.1rem;
    color: var(--text-gray);
    font-weight: 500;
    letter-spacing: 1px;
}

/* 3. Mission and Values (White) */
#mission {
    background: var(--white);
}

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

.mission-row {
    display: flex;
    gap: 40px;
    margin-bottom: 80px;
    align-items: flex-start;
}

.sub-label {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--rnh-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
    min-width: 180px;
    padding-top: 25px;
}

.mission-card {
    background: var(--white);
    padding: 50px;
    border-radius: 25px;
    flex: 1;
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.mission-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(26, 54, 127, 0.08);
}

.mission-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--rnh-gold);
}

.mission-card p {
    font-size: 1.35rem;
    color: var(--text-dark);
    font-weight: 500;
    line-height: 1.6;
}

.value-card {
    padding: 50px;
    border-radius: 25px;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(26, 54, 127, 0.1);
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--rnh-gold);
}

.value-card h4 {
    font-family: 'Noto Sans', sans-serif;
    font-size: 1.6rem;
    color: var(--rnh-blue);
    margin-bottom: 25px;
}

.value-card p {
    color: var(--text-gray);
    font-size: 1.1rem;
}

/* 4. Who We Serve (Blue) */
#serve {
    background: var(--rnh-blue-dark);
}

.serve-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.serve-card {
    background: rgba(255, 255, 255, 0.08);
    padding: 70px;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.serve-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-10px);
    border-color: var(--rnh-gold);
}

.serve-card i {
    font-size: 4rem;
    color: var(--rnh-gold);
    margin-bottom: 35px;
}

.serve-card h4 {
    font-size: 2.2rem;
    color: var(--white);
    margin-bottom: 25px;
    font-family: 'Noto Sans', sans-serif;
}

.serve-card p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.15rem;
}

/* Client Showcase */
.client-showcase {
    margin-top: 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.client-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.client-card {
    display: flex;
    align-items: center;
    gap: 25px;
    background: rgba(255, 255, 255, 0.03);
    padding: 25px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.client-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateX(10px);
}

.client-logo {
    width: 150px;
    height: 60px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    flex-shrink: 0;
}

.client-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Logo Placeholder Text */
.logo-placeholder {
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--rnh-blue);
    text-align: center;
}

.logo img {
    width: 75%;
    height: 60px;
    object-fit: contain;
}

.client-info h5 {
    font-family: 'Noto Sans', sans-serif;
    font-size: 1.25rem;
    color: var(--white);
    margin-bottom: 4px;
}

.client-info p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.4;
}

/* 5. Executive Team (White) */
#team {
    background: var(--white);
}

.team-cat-box {
    margin-bottom: 100px;
}

.cat-head {
    font-family: 'Noto Sans', sans-serif;
    font-size: 1.4rem;
    color: var(--rnh-blue);
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.cat-head::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-light);
}

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

/* Responsive: 2 columns on medium screens, 1 on small */
@media (max-width: 900px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .team-grid {
        grid-template-columns: 1fr;
    }
}

.member-card {
    background: transparent;
    perspective: 1000px;
    height: 280px;
    cursor: pointer;
}

@media (max-width: 600px) {
    .member-card {
        height: 350px;
    }

}

.member-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: left;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.member-card.flipped .member-card-inner {
    transform: rotateY(180deg);
}

.member-card-front,
.member-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 20px;
    padding: 30px;
}

.member-card-back::-webkit-scrollbar {
    visibility: hidden;
}

.member-card-back::-webkit-scrollbar-track {
    background: transparent;
}

.member-card-back::-webkit-scrollbar-thumb {
    visibility: hidden;
}

.member-card-front {
    background: var(--gray-light);
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-left: 0 solid var(--rnh-gold);
    transition: var(--transition);
}

.member-card:hover .member-card-front {
    background: var(--white);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-left: 8px solid var(--rnh-gold);
}

.member-card-front h5 {
    font-size: 2.6rem;
    color: var(--rnh-blue);
    margin-bottom: 8px;
}

.member-card-front p {
    font-size: 1.05rem;
    color: var(--text-dark);
    font-weight: 700;
}

.member-card-back {
    background: var(--rnh-blue-dark);
    color: var(--white);
    transform: rotateY(180deg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.member-card-back ul {
    list-style: none;
    padding: 0;
    font-size: 0.95rem;
    line-height: 1.6;
}

.member-card-back li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
}

.member-card-back li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--rnh-gold);
}

/* 6. Connect (Dark Blue) */
#connect {
    background: var(--rnh-blue-dark);
    text-align: center;
    color: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    border-bottom: 1px solid var(--rnh-gold)
}

#connect .section-title {
    color: var(--white);
    margin-bottom: 30px;
}

#connect p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
}

.btn-demo {
    display: inline-block;
    padding: 22px 60px;
    background: var(--rnh-gold);
    color: var(--rnh-blue);
    font-weight: 800;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: var(--transition);
    margin-top: 40px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-demo:hover {
    background: var(--white);
    color: var(--rnh-blue);
    transform: translateY(-5px) scale(1.05);
}

/* 7. Contact (White) */
#contact {
    background: var(--white);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    padding: 100px 10%;
    align-items: center;
}

.contact-branding {
    margin-top: 0px;
}

.contact-logo-large {
    width: 300px;
    margin-bottom: 30px;
    display: block;
}

.contact-description {
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--text-dark);
    font-weight: 500;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-row.full-width {
    grid-template-columns: 1fr;
}


.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 18px 20px;
    border: 1px solid #E5E9F2;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    background: #F8FAFD;
    outline: none;
    transition: var(--transition);
    color: var(--text-dark);
}

.contact-form input::placeholder,
.contact-form select,
.contact-form textarea::placeholder {
    color: #A0AEC0;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    background: var(--white);
    border-color: var(--rnh-blue);
    box-shadow: 0 0 0 3px rgba(26, 54, 127, 0.05);
}

.form-consent {
    margin-top: 10px;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.privacy-text {
    margin-bottom: 20px;
    line-height: 1.6;
}

.privacy-text a {
    color: #E3342F;
    text-decoration: underline;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-container input {
    width: auto;
    margin-bottom: 0;
}

.btn-send {
    align-self: center;
    width: 200px;
    padding: 15px;
    background: #E3342F;
    /* Red color from image */
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    margin: 20px 0;
}

.btn-send:hover {
    background: #C53030;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(227, 52, 47, 0.3);
}

.form-footer-note {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-gray);
    font-style: italic;
}

/* Footer (Blue) */
footer {
    padding: 80px 10%;
    background: var(--rnh-blue-dark);
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
}

.footer-logo {
    font-family: 'Noto Sans', sans-serif;
    font-size: 22px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 25px;
}

.footer-logo span {
    color: var(--rnh-gold);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(13, 27, 62, 0.95);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

.modal-content {
    background: var(--white);
    max-width: 650px;
    width: 100%;
    padding: 60px;
    border-radius: 40px;
    position: relative;
    border: 4px solid var(--rnh-gold);
}

.close-modal {
    position: absolute;
    top: 35px;
    right: 35px;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-gray);
}

.modal-body h3 {
    font-family: 'Noto Sans', sans-serif;
    font-size: 2.5rem;
    color: var(--rnh-blue);
    margin-bottom: 10px;
}

.modal-body h4 {
    font-size: 1.3rem;
    color: var(--rnh-gold);
    margin-bottom: 35px;
    font-weight: 700;
    text-transform: uppercase;
}

.modal-bio {
    font-size: 1.15rem;
    line-height: 1.9;
    color: var(--text-gray);
}

.modal-bio ul {
    list-style: none;
    padding: 0;
}

.modal-bio li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 12px;
}

.modal-bio li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--rnh-gold);
    font-weight: bold;
}

/* Responsive Overhaul */
@media (max-width: 1024px) {
    nav {
        width: 95%;
        top: 10px;
        padding: 0 20px;
        height: 70px;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: fixed;
        top: 90px;
        left: 2.5%;
        width: 95%;
        background: var(--white);
        padding: 40px 20px;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        z-index: 1001;
        text-align: center;
        gap: 20px;
        border-radius: 20px;
        border: 1px solid rgba(26, 54, 127, 0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
        cursor: pointer;
        order: 3;
    }

    .menu-toggle .bar {
        display: block;
        width: 25px;
        height: 3px;
        margin: 5px auto;
        background-color: var(--rnh-blue);
        transition: var(--transition);
    }

    .menu-toggle.is-active .bar:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.is-active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .menu-toggle.is-active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-contact {
        display: none;
        /* Hide standard button on mobile */
    }

    .nav-menu .nav-contact {
        display: flex;
        /* Show inside mobile menu */
        margin: 0;
    }

    .logo {
        margin-right: 0;
    }

    .hero-box h1 {
        font-size: 2rem;
    }

    .about-grid,
    #contact {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 60px 5%;
    }

    .stats-grid,
    .values-grid,
    .serve-grid,
    .client-showcase,
    .about-grid,
    .mission-grid,
    .contact-grid {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: 1fr !important;
        gap: 30px !important;
    }

    .mission-row {
        flex-direction: column !important;
        align-items: flex-start !important;
    }

    .sub-label {
        width: 100% !important;
        margin-bottom: 15px !important;
    }

    .client-list {
        width: 100% !important;
    }

    .form-row {
        flex-direction: column !important;
    }

    .stat-card,
    .mission-card,
    .value-card,
    .client-card,
    .member-card {
        width: 100% !important;
        max-width: 100% !important;
        padding: 30px 20px !important;
    }

    .stat-card h3 {
        font-size: 6.5rem;
    }

    .mission-card p {
        font-size: 1.1rem;
    }

    .client-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding: 20px;
    }

    .client-logo {
        width: 120px;
        height: 50px;
        flex-shrink: 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-subtitle {
        font-size: 0.9rem;
    }

    .section-content {
        padding: 50px 15px !important;
    }

    .hero-box h1 {
        font-size: 1.8rem;
    }
}