/* ==========================================================================
   Design Tokens & CSS Variables
   ========================================================================== */
:root {
    --brand-orange: #E8A33D;
    --brand-green: #1F6B3A;
    --brand-green-light: #2E7D32;
    --accent-lime: #8BC34A;
    --bg-lavender: #F6F2FF;
    --bg-pastel-pink: #FDF2F4;
    
    --text-dark: #1A1A1A;
    --text-medium: #4A4A4A;
    --text-light: #7E7E7E;
    --border-color: #E2E8F0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.12);
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

/* ==========================================================================
   Basic Reset & Typography
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    color: var(--text-dark);
    background-color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

button, input, textarea {
    font-family: inherit;
    outline: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==========================================================================
   Header & GNB (Global Navigation Bar)
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.header-container {
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 48px;
    object-fit: contain;
}

.nav-menu {
    height: 100%;
}

.nav-menu ul {
    display: flex;
    height: 100%;
}

.nav-item {
    height: 100%;
    display: flex;
    align-items: center;
    position: relative;
}

.nav-link {
    padding: 0 1.25rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-medium);
    height: 100%;
    display: flex;
    align-items: center;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1.25rem;
    right: 1.25rem;
    height: 4px;
    background-color: var(--brand-green);
    transform: scaleX(0);
    transition: var(--transition-smooth);
    border-radius: 4px 4px 0 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--brand-green);
}

.nav-link.active::after, .nav-link:hover::after {
    transform: scaleX(1);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-top {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    color: var(--text-medium);
    background-color: #FFFFFF;
}

.btn-register {
    background-color: var(--brand-green);
    color: #FFFFFF;
    border-color: var(--brand-green);
}

.btn-register:hover {
    background-color: var(--brand-green-light);
    border-color: var(--brand-green-light);
    box-shadow: var(--shadow-sm);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
}

/* ==========================================================================
   Sub Navigation Bar & Breadcrumb
   ========================================================================== */
.sub-nav-section {
    margin-top: 80px; /* Header Height */
    background-color: #F8FAFC;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
    display: none; /* Only show when submenus are active */
}

.sub-nav-section.active {
    display: block;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sub-nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.breadcrumb {
    font-size: 0.8rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb a:hover {
    color: var(--brand-green);
}

.breadcrumb .divider {
    color: #CBD5E1;
}

.breadcrumb .current-child {
    font-weight: 700;
    color: var(--brand-green);
}

.sub-menu-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding-top: 0.5rem;
}

.sub-menu-group {
    display: none;
    gap: 1.5rem;
    width: 100%;
}

.sub-menu-group.active {
    display: flex;
    flex-wrap: wrap;
}

.sub-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-medium);
    position: relative;
    padding: 0.25rem 0;
}

.sub-link:hover, .sub-link.active {
    color: var(--brand-green);
}

.sub-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--brand-green);
}

/* ==========================================================================
   Page Sections & Router Transition
   ========================================================================== */
.page-section {
    display: none;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    padding-bottom: 5rem;
}

.page-section.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   HOME PAGE: Hero Banner & Content
   ========================================================================== */
.hero-banner {
    height: 480px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #FFFFFF;
    position: relative;
}

.hero-content {
    z-index: 2;
    padding: 0 1.5rem;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.35;
    margin-bottom: 1rem;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
    word-break: keep-all;
}

.hero-subtitle {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

/* Overlapping Cards Grid */
.overlapping-cards-container {
    position: relative;
    z-index: 10;
    margin-top: -80px; /* Overlap effect */
    margin-bottom: 3.5rem;
}

.overlapping-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.card-item {
    background-color: #FFFFFF;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: 1.75rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 340px;
}

.card-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.card-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--brand-green);
    position: relative;
    padding-left: 0.75rem;
}

.card-header h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 16px;
    background-color: var(--brand-orange);
    border-radius: 2px;
}

.btn-plus {
    font-size: 1rem;
    color: var(--text-light);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #F1F5F9;
}

.btn-plus:hover {
    background-color: var(--brand-green);
    color: #FFFFFF;
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    flex-grow: 1;
}

.card-list li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-medium);
    gap: 1rem;
}

.card-list li a:hover {
    color: var(--brand-green);
}

.list-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
}

.list-date {
    font-size: 0.8rem;
    color: var(--text-light);
    flex-shrink: 0;
}

.card-footer {
    padding-top: 1rem;
}

.btn-more {
    display: inline-block;
    width: 100%;
    text-align: center;
    padding: 0.6rem 0;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    background-color: transparent;
    transition: var(--transition-fast);
}

.border-pink {
    border: 1px solid #FDA4AF;
    color: #E11D48;
}

.border-pink:hover {
    background-color: #FFF1F2;
}

.border-green {
    border: 1px solid rgba(31, 107, 58, 0.4);
    color: var(--brand-green);
}

.border-green:hover {
    background-color: rgba(31, 107, 58, 0.05);
}

/* Icon Links Grid */
.icon-links-section {
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.icon-links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.icon-link-item {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
    background-color: #F8FAFC;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.03);
    transition: var(--transition-smooth);
}

.icon-link-item:hover {
    background-color: #FFFFFF;
    box-shadow: var(--shadow-sm);
    border-color: var(--brand-green);
}

.icon-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: rgba(31, 107, 58, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--brand-green);
    transition: var(--transition-smooth);
}

.icon-link-item:hover .icon-circle {
    background-color: var(--brand-green);
    color: #FFFFFF;
}

.icon-label {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.lbl-ko {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
}

.lbl-en {
    font-family: 'Outfit', sans-serif;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-light);
}

/* ==========================================================================
   SUB PAGE: General Elements
   ========================================================================== */
.section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--brand-green);
    margin-top: 3rem;
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
    padding-bottom: 0.75rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--brand-orange);
    border-radius: 2px;
}

.gradient-banner {
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-green) 100%);
    color: #FFFFFF;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.gradient-banner h3 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.mt-large {
    margin-top: 3.5rem;
}

/* ==========================================================================
   SUB PAGE: 협회장 인사말
   ========================================================================== */
.greeting-content {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 3rem;
    align-items: start;
}

.greeting-text p {
    font-size: 1rem;
    color: var(--text-medium);
    margin-bottom: 1.25rem;
    text-align: justify;
    word-break: keep-all;
}

.greeting-highlight {
    font-size: 1.25rem !important;
    font-weight: 700;
    color: var(--brand-green);
    margin-bottom: 1.75rem !important;
    border-left: 4px solid var(--brand-orange);
    padding-left: 0.75rem;
}

.signature {
    text-align: right !important;
    margin-top: 2rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 1.5rem;
}

.signature strong {
    font-size: 1.1rem;
    color: var(--text-dark);
}

.greeting-photo {
    display: flex;
    justify-content: center;
}

.photo-frame-gold {
    width: 280px;
    height: 360px;
    padding: 10px;
    background: linear-gradient(135deg, #d4af37 0%, #f3e5ab 50%, #d4af37 100%);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.president-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    background-color: #FFFFFF;
}

/* ==========================================================================
   SUB PAGE: 협회소개
   ========================================================================== */
.association-card {
    background-color: var(--bg-lavender);
    border-radius: 16px;
    padding: 3rem;
    border: 1px solid rgba(139, 92, 246, 0.1);
    box-shadow: var(--shadow-sm);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.assoc-slogan {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--brand-green);
    margin-bottom: 2rem;
    letter-spacing: -0.5px;
}

.assoc-desc p {
    font-size: 1.05rem;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    word-break: keep-all;
}

.assoc-desc p:last-child {
    margin-bottom: 0;
}

/* ==========================================================================
   SUB PAGE: 임원소개
   ========================================================================== */
.executives-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.exec-card {
    background-color: #FFFFFF;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition-smooth);
}

.exec-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.exec-photo-wrapper {
    width: 100%;
    height: 380px;
    background-color: #F8FAFC;
    overflow: hidden;
}

.exec-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.exec-info {
    padding: 1.25rem;
    border-top: 2px solid rgba(31, 107, 58, 0.08);
}

.exec-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--brand-green);
    margin-bottom: 0.5rem;
}

.exec-desc {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-medium);
}

.exec-sub {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.2rem;
}

/* ==========================================================================
   SUB PAGE: 회칙 & 자격규정
   ========================================================================== */
.rules-content {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

.rule-item {
    margin-bottom: 2rem;
}

.rule-item:last-child {
    margin-bottom: 0;
}

.rule-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--brand-green);
    margin-bottom: 0.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding-bottom: 0.35rem;
}

.rule-item p {
    font-size: 0.95rem;
    color: var(--text-medium);
    line-height: 1.6;
}

.sub-rule-title {
    font-weight: 700;
    margin-top: 0.75rem;
    margin-bottom: 0.5rem;
}

.roles-bullets {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-left: 0.5rem;
}

.roles-bullets li {
    font-size: 0.95rem;
    color: var(--text-medium);
    display: flex;
    gap: 0.5rem;
}

.roles-bullets li i {
    color: var(--brand-green);
    margin-top: 0.25rem;
}

.alert-info-box {
    margin-top: 2rem;
    background-color: #F8FAFC;
    border-left: 4px solid var(--brand-orange);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-medium);
}

.alert-info-box i {
    color: var(--brand-orange);
}

/* ==========================================================================
   SUB PAGE: 윤리규정
   ========================================================================== */
.ethics-box {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: var(--shadow-sm);
    max-width: 900px;
    margin: 0 auto;
}

.ethics-intro {
    text-align: center;
    margin-bottom: 2.5rem;
}

.icon-ethics {
    font-size: 3rem;
    color: var(--brand-green);
    margin-bottom: 1rem;
}

.ethics-intro h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.ethics-intro p {
    font-size: 0.95rem;
    color: var(--text-light);
}

.ethics-points {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.point-item {
    display: flex;
    align-items: start;
    gap: 1.25rem;
    padding: 1.25rem;
    background-color: #F8FAFC;
    border-radius: 8px;
}

.point-num {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--brand-orange);
    line-height: 1;
}

.point-txt strong {
    font-size: 1rem;
    color: var(--brand-green);
    display: block;
    margin-bottom: 0.25rem;
}

.point-txt p {
    font-size: 0.9rem;
    color: var(--text-medium);
}

/* ==========================================================================
   SUB PAGE: 공지사항 목록
   ========================================================================== */
.notice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.notice-card-item {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    display: block;
}

.notice-card-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--brand-green);
}

.notice-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.5rem;
    background-color: rgba(31, 107, 58, 0.08);
    color: var(--brand-green);
    border-radius: 4px;
    margin-bottom: 0.75rem;
}

.notice-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.notice-excerpt {
    font-size: 0.9rem;
    color: var(--text-medium);
    margin-bottom: 1.25rem;
    word-break: keep-all;
}

.notice-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ==========================================================================
   SUB PAGE: 공지사항 상세
   ========================================================================== */
.bg-pastel-pink-section {
    background-color: var(--bg-pastel-pink);
    border-radius: 16px;
    border: 1px solid rgba(244, 63, 94, 0.06);
    box-shadow: var(--shadow-sm);
}

.detail-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 0;
}

.detail-header {
    text-align: center;
    margin-bottom: 3rem;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.08);
    padding-bottom: 2rem;
}

.detail-sub {
    font-size: 1rem;
    color: var(--brand-green);
    font-weight: 700;
    letter-spacing: 0.5px;
}

.detail-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-top: 0.5rem;
}

.speakers-book-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    align-items: center;
    gap: 2rem;
    text-align: center;
    margin-bottom: 3rem;
}

.speaker-img-wrapper {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-sm);
    border: 3px solid #FFFFFF;
}

.speaker-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.speaker-left h5, .speaker-right h5 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.speaker-left p, .speaker-right p {
    font-size: 0.85rem;
    color: var(--text-medium);
}

.book-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.book-art {
    width: 110px;
    height: 150px;
    background-color: #dfd9e2;
    border-radius: 4px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    border-left: 5px solid rgba(0, 0, 0, 0.15);
}

.icon-book-placeholder {
    font-size: 2.25rem;
    color: var(--brand-green);
    margin-bottom: 0.5rem;
}

.book-name {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.2;
}

.badge-gift {
    font-size: 0.75rem;
    font-weight: 700;
    background-color: #E11D48;
    color: #FFFFFF;
    padding: 0.35rem 0.75rem;
    border-radius: 30px;
}

.details-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2.5rem;
    background-color: #FFFFFF;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.details-table th, .details-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.details-table th {
    background-color: #F8FAFC;
    color: var(--brand-green);
    font-weight: 700;
    width: 25%;
    text-align: left;
}

.details-table td {
    color: var(--text-medium);
}

.detail-footer {
    text-align: center;
}

/* ==========================================================================
   SUB PAGE: 학술/자격 안내Large Alert
   ========================================================================== */
.info-alert-large {
    background-color: #F8FAFC;
    border-radius: 16px;
    padding: 4rem 2rem;
    text-align: center;
    border: 1px dashed var(--border-color);
    max-width: 700px;
    margin: 0 auto;
}

.info-alert-large i {
    font-size: 3.5rem;
    color: var(--brand-green);
    margin-bottom: 1.5rem;
    opacity: 0.85;
}

.info-alert-large h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.info-alert-large p {
    font-size: 0.95rem;
    color: var(--text-light);
    word-break: keep-all;
}

/* ==========================================================================
   SUB PAGE: 연구회
   ========================================================================== */
.meeting-box {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.tag-banner {
    display: inline-block;
    background-color: #E11D48;
    color: #FFFFFF;
    padding: 0.5rem 1rem;
    font-weight: 700;
    border-radius: 4px;
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.timeline {
    position: relative;
    padding-left: 2rem;
    border-left: 2px solid var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: calc(-2rem - 13px);
    top: 0;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: var(--brand-green);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.timeline-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.timeline-content ul {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.9rem;
    color: var(--text-medium);
}

/* ==========================================================================
   SUB PAGE: 전문가 프로그램 & 민간자격증 안내 (Tables)
   ========================================================================== */
.table-wrapper {
    overflow-x: auto;
}

.program-table, .cert-info-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.program-table th, .program-table td,
.cert-info-table th, .cert-info-table td {
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border-color);
}

.program-table th, .cert-info-table th {
    background-color: #F8FAFC;
    color: var(--brand-green);
    font-weight: 700;
    text-align: left;
}

.program-table td, .cert-info-table td {
    color: var(--text-medium);
}

.program-table tbody tr:hover, .cert-info-table tbody tr:hover {
    background-color: #F8FAFC;
}

.program-table td a:hover {
    color: var(--brand-green);
    text-decoration: underline;
}

/* ==========================================================================
   SUB PAGE: 회원추천도서
   ========================================================================== */
.books-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.book-card {
    background-color: #FFFFFF;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.book-cover {
    height: 240px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    border-left: 8px solid rgba(0, 0, 0, 0.15);
}

.cover-icon {
    font-size: 2.75rem;
    color: var(--brand-green);
    margin-bottom: 0.75rem;
}

.cover-title {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text-dark);
    text-align: center;
    line-height: 1.3;
}

.book-info {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.book-info h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
}

.book-meta {
    font-size: 0.8rem;
    color: var(--brand-green-light);
    font-weight: 600;
}

.book-desc {
    font-size: 0.85rem;
    color: var(--text-medium);
    line-height: 1.5;
    word-break: keep-all;
}

/* ==========================================================================
   SUB PAGE: 회원가입 및 회비안내
   ========================================================================== */
.bg-lavender-section {
    background-color: var(--bg-lavender);
    border-radius: 16px;
    padding: 2.5rem;
    border: 1px solid rgba(139, 92, 246, 0.08);
}

.join-conditions-box {
    background-color: #FFFFFF;
    border-radius: 8px;
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.main-cond {
    font-size: 0.95rem;
    color: var(--text-medium);
    font-weight: 700;
    margin-bottom: 1.25rem;
    word-break: keep-all;
}

.cond-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.cond-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-medium);
}

.cond-list li i {
    color: var(--brand-green);
}

.fee-intro {
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-bottom: 1.25rem;
}

.fee-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.fee-card {
    background-color: #FFFFFF;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition-fast);
}

.fee-card:hover {
    border-color: var(--brand-green);
    transform: translateY(-2px);
}

.fee-card h4 {
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
}

.fee-card .price {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--brand-green);
    margin-bottom: 0.25rem;
}

.fee-card .detail {
    font-size: 0.75rem;
    color: var(--text-light);
}

.account-info-box {
    background-color: #FFFFFF;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.account-info-box h4 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--brand-green);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.account-info-box .account {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
}

.account-info-box .sub-alert {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 1.25rem;
}

.info-notes {
    border-top: 1px dashed var(--border-color);
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-medium);
}

/* ==========================================================================
   SUB PAGE: 게시판 Q&A
   ========================================================================== */
.qa-placeholder-box {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.qa-list {
    display: flex;
    flex-direction: column;
}

.qa-list li {
    border-bottom: 1px solid var(--border-color);
}

.qa-list li:last-child {
    border-bottom: none;
}

.q-row {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    font-size: 0.95rem;
}

.q-row:hover {
    background-color: #F8FAFC;
}

.status {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    flex-shrink: 0;
}

.q-waiting {
    background-color: #E2E8F0;
    color: #475569;
}

.q-complete {
    background-color: rgba(31, 107, 58, 0.08);
    color: var(--brand-green);
}

.q-row strong {
    flex-grow: 1;
    color: var(--text-dark);
}

.q-row .author {
    font-size: 0.8rem;
    color: var(--text-light);
    flex-shrink: 0;
}

.answer-row {
    background-color: #F8FAFC;
    padding: 1.25rem;
    display: flex;
    gap: 0.75rem;
    border-top: 1px dashed var(--border-color);
}

.icon-answer {
    color: var(--brand-orange);
    transform: rotate(90deg);
    font-size: 1rem;
    margin-top: 0.25rem;
}

.ans-content {
    font-size: 0.9rem;
    color: var(--text-medium);
}

/* ==========================================================================
   SUB PAGE: 문의하기 (Contact Form)
   ========================================================================== */
.contact-box {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 3rem;
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.contact-info h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--brand-green);
    margin-bottom: 0.5rem;
}

.contact-info .lead {
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-bottom: 2rem;
}

.contact-meta-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-meta-list li {
    display: flex;
    align-items: start;
    gap: 1rem;
}

.contact-meta-list li i {
    font-size: 1.25rem;
    color: var(--brand-orange);
    margin-top: 0.2rem;
}

.contact-meta-list li strong {
    font-size: 0.95rem;
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.25rem;
}

.contact-meta-list li span {
    font-size: 0.85rem;
    color: var(--text-medium);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-medium);
}

.form-group input, .form-group textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--brand-green);
    box-shadow: 0 0 0 2px rgba(31, 107, 58, 0.1);
}

.btn-submit {
    align-self: start;
    padding: 0.75rem 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ==========================================================================
   SUB PAGE: 강의의뢰 (강사 목록)
   ========================================================================== */
.instructors-tab-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.inst-tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-medium);
    cursor: pointer;
    transition: var(--transition-fast);
}

.inst-tab-btn:hover, .inst-tab-btn.active {
    color: var(--brand-green);
    border-bottom-color: var(--brand-green);
}

.instructor-profile-container {
    background-color: #FFFFFF;
}

.instructor-view {
    display: none;
    animation: fadeIn 0.4s ease;
}

.instructor-view.active {
    display: block;
}

.instructor-top-card {
    display: grid;
    grid-template-columns: 0.6fr 1.4fr;
    gap: 3rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2.5rem;
    margin-bottom: 2.5rem;
}

.inst-photo-box {
    text-align: center;
    background-color: #F8FAFC;
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.inst-photo-img {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    border: 3px solid #FFFFFF;
}

.inst-photo-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
}

.inst-photo-title {
    font-size: 0.85rem;
    color: var(--brand-green-light);
    display: block;
    margin-bottom: 1rem;
}

.inst-contact-badge {
    border-top: 1px dashed var(--border-color);
    padding-top: 1rem;
    font-size: 0.8rem;
    color: var(--text-medium);
}

.inst-contact-badge p {
    margin-bottom: 0.25rem;
}

.inst-main-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.inst-main-slogan {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--brand-green);
    margin-bottom: 1.25rem;
}

.inst-intro-paragraph p {
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-bottom: 1rem;
    word-break: keep-all;
}

.inst-cta-box {
    margin-top: 1.5rem;
}

.inst-details-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

/* Adjust columns if there are 4 (e.g. for instructors with more info) */
.instructor-view[id$="oh"] .inst-details-columns,
.instructor-view[id$="kim"] .inst-details-columns,
.instructor-view[id$="choi"] .inst-details-columns,
.instructor-view[id$="jung-sh"] .inst-details-columns,
.instructor-view[id$="chae-si"] .inst-details-columns {
    grid-template-columns: repeat(4, 1fr);
}

.detail-col {
    background-color: #F8FAFC;
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid rgba(0, 0, 0, 0.02);
}

.detail-col h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--brand-green);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.detail-col h5 i {
    color: var(--brand-orange);
}

.detail-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.detail-col ul li {
    font-size: 0.85rem;
    color: var(--text-medium);
    position: relative;
    padding-left: 0.5rem;
}

.detail-col ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--brand-orange);
}

/* ==========================================================================
   Main Buttons & Global Styles
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary {
    background-color: var(--brand-green);
    color: #FFFFFF;
    border: 1px solid var(--brand-green);
}

.btn-primary:hover {
    background-color: var(--brand-green-light);
    border-color: var(--brand-green-light);
    box-shadow: var(--shadow-sm);
}

.btn-outline {
    background-color: transparent;
    color: var(--brand-green);
    border: 1px solid var(--brand-green);
}

.btn-outline:hover {
    background-color: rgba(31, 107, 58, 0.05);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.main-footer {
    background-color: #1E293B;
    color: #94A3B8;
    padding: 4rem 0 2rem;
    border-top: 1px solid #334155;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: start;
    border-bottom: 1px solid #334155;
    padding-bottom: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    height: 48px;
    object-fit: contain;
    filter: brightness(0) invert(1) opacity(0.85); /* Make logo white-ish */
    margin-bottom: 0.75rem;
}

.slogan-txt {
    font-size: 0.95rem;
    font-weight: 600;
    color: #F1F5F9;
}

.footer-buttons {
    display: flex;
    gap: 0.75rem;
}

.btn-footer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #1E293B;
}

.btn-kakao {
    background-color: #FEE500;
}

.btn-kakao:hover {
    background-color: #E6CF00;
}

.btn-phone {
    background-color: #38BDF8;
    color: #FFFFFF;
}

.btn-phone:hover {
    background-color: #0EA5E9;
}

.footer-info {
    font-size: 0.85rem;
    line-height: 1.8;
}

.footer-info p {
    margin-bottom: 0.35rem;
}

.copyright {
    margin-top: 0.5rem;
    color: #64748B;
}

.footer-links {
    margin-top: 2rem;
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: #FFFFFF;
}

.footer-links .bar {
    color: #334155;
    margin: 0 0.5rem;
}

/* ==========================================================================
   SUB PAGE: 연구사례 워크숍 스타일
   ========================================================================== */
.workshop-detail-box {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.workshop-header-banner {
    background: linear-gradient(135deg, var(--brand-green) 0%, var(--brand-green-light) 100%);
    color: #FFFFFF;
    padding: 3rem 2rem;
    text-align: center;
}

.workshop-badge {
    display: inline-block;
    background-color: var(--brand-orange);
    color: #FFFFFF;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.35rem 0.85rem;
    border-radius: 30px;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.workshop-header-banner h3 {
    font-size: 1.85rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
}

.workshop-meta-info {
    display: flex;
    justify-content: center;
    gap: 1rem;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
}

.workshop-meta-info i {
    margin-right: 0.25rem;
}

.workshop-meta-info .bar {
    opacity: 0.5;
}

.workshop-content-body {
    padding: 3rem 2.5rem;
}

.workshop-intro {
    font-size: 1.05rem;
    color: var(--text-medium);
    text-align: center;
    line-height: 1.7;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    word-break: keep-all;
}

.workshop-program-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.program-card {
    background-color: #F8FAFC;
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid rgba(0, 0, 0, 0.02);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: var(--transition-smooth);
}

.program-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
    border-color: rgba(31, 107, 58, 0.2);
}

.prog-icon {
    font-size: 2rem;
    color: var(--brand-green);
}

.program-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
}

.program-card p {
    font-size: 0.9rem;
    color: var(--text-medium);
    line-height: 1.6;
    word-break: keep-all;
}

.card-full-width {
    grid-column: span 2;
}

.click-hint {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--brand-orange);
    background-color: rgba(232, 163, 61, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-left: 0.5rem;
    font-weight: 500;
    vertical-align: middle;
}

/* ==========================================================================
   Workshop Gallery Lightbox Modal
   ========================================================================== */
.workshop-modal {
    display: none;
    position: fixed;
    z-index: 1100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    align-items: center;
    justify-content: center;
    padding: 2rem;
    box-sizing: border-box;
}

.workshop-modal.active {
    display: flex;
    animation: fadeIn 0.3s ease-out;
}

.workshop-modal-content {
    background-color: #FFFFFF;
    border-radius: 16px;
    width: 100%;
    max-width: 900px;
    padding: 2.5rem;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    max-height: 85vh;
    overflow-y: auto;
}

.workshop-modal-close {
    position: absolute;
    top: 1.25rem;
    right: 1.5rem;
    color: var(--text-medium);
    font-size: 2.5rem;
    font-weight: 300;
    cursor: pointer;
    transition: var(--transition-smooth);
    line-height: 1;
}

.workshop-modal-close:hover {
    color: var(--brand-orange);
}

#workshop-modal-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--brand-green-light);
    padding-bottom: 0.75rem;
    text-align: center;
}

.workshop-modal-images-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    justify-content: center;
}

.workshop-modal-images-grid img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    object-fit: cover;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-smooth);
}

.workshop-modal-images-grid img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

/* For single image or odd number images layout adjustment */
.workshop-modal-images-grid img.single-image {
    grid-column: span 2;
    max-width: 600px;
    margin: 0 auto;
}

@media (max-width: 767px) {
    .workshop-modal {
        padding: 1rem;
    }
    
    .workshop-modal-content {
        padding: 1.5rem;
        max-height: 90vh;
    }
    
    .workshop-modal-images-grid {
        grid-template-columns: 1fr;
    }
    
    .workshop-modal-images-grid img.single-image {
        grid-column: span 1;
    }
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */

/* Tablet Layout (under 1024px) */
@media (max-width: 1024px) {
    .overlapping-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .card-item {
        height: auto;
        min-height: 280px;
    }
    
    .executives-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .inst-details-columns,
    .instructor-view[id$="oh"] .inst-details-columns,
    .instructor-view[id$="kim"] .inst-details-columns,
    .instructor-view[id$="choi"] .inst-details-columns {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .fee-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .greeting-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .greeting-photo {
        order: -1;
    }
}

/* Mobile Layout (under 768px) */
@media (max-width: 767px) {
    html {
        font-size: 14px;
    }
    
    .main-header {
        height: 70px;
    }
    
    .sub-nav-section {
        margin-top: 70px;
    }
    
    .logo-img {
        height: 38px;
    }
    
    /* GNB Hamburger Toggle */
    .mobile-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: #FFFFFF;
        box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        transform: translateX(-100%);
        transition: var(--transition-smooth);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-menu ul {
        flex-direction: column;
        height: auto;
        padding: 1.5rem;
    }
    
    .nav-item {
        width: 100%;
        height: auto;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link {
        padding: 1rem 0;
        width: 100%;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .header-right {
        gap: 0.5rem;
    }
    
    .btn-top {
        display: none; /* Hide top buttons on mobile, show menu items */
    }
    
    .hero-banner {
        height: 360px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .icon-links-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .executives-grid {
        grid-template-columns: 1fr;
    }
    
    .books-grid {
        grid-template-columns: 1fr;
    }
    
    .fee-cards-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-box {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .instructor-top-card {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .inst-details-columns,
    .instructor-view[id$="oh"] .inst-details-columns,
    .instructor-view[id$="kim"] .inst-details-columns,
    .instructor-view[id$="choi"] .inst-details-columns {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .footer-buttons {
        width: 100%;
    }
    
    .btn-footer {
        flex: 1;
        justify-content: center;
    }
    
    .association-card {
        padding: 1.5rem;
    }
    
    .assoc-slogan {
        font-size: 1.25rem;
    }
}