/* SDF - Society for Digital Finance
   Classic Academic Theme
   Colors: IDA Blue (#1C4372), IDA Red (#CA444E), White
*/

/* ========================================
   CSS Variables
   ======================================== */
:root {
    --navy: #1C4372;
    --navy-light: #2A5A8F;
    --navy-dark: #122D4F;
    --gold: #CA444E;
    --gold-light: #D6686F;
    --gold-dark: #A83840;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --font-heading: 'Merriweather', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);

    --transition: 0.2s ease;
}

/* ========================================
   Reset & Base
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--navy);
}

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

a:hover {
    color: var(--gold-dark);
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

/* ========================================
   Layout
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 4rem 0;
}

.section-alt {
    background-color: var(--gray-50);
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 0.5rem;
    position: relative;
    color: var(--navy);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gold);
    margin: 0.75rem auto 0;
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    color: var(--gray-600);
    font-size: 1.125rem;
    line-height: 1.7;
}

.subsection-title {
    font-size: 1.5rem;
    margin: 3rem 0 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--gold);
    color: var(--navy);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--shadow);
    transition: background var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--navy);
}

.logo-subtext {
    font-size: 0.75rem;
    color: var(--gray-500);
    display: none;
}

@media (min-width: 768px) {
    .logo-subtext {
        display: block;
    }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-menu a {
    padding: 0.5rem 0.875rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: 4px;
    transition: all var(--transition);
}

.nav-menu a:hover {
    background: var(--gray-100);
    color: var(--navy);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--navy);
    transition: all var(--transition);
}

@media (max-width: 900px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
        display: none;
    }

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

    .nav-menu a {
        width: 100%;
        padding: 0.75rem 1rem;
    }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy);
    padding: 6rem 1.5rem 4rem;
    text-align: center;
    border-bottom: 3px solid var(--gold);
}

.hero-content {
    max-width: 900px;
}

.hero-title {
    font-size: 4rem;
    color: var(--white);
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
}

.hero-title::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gold);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: 2rem;
    margin-top: 1.5rem;
    font-weight: 400;
    font-family: var(--font-body);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-300);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-buttons a {
    color: var(--gold);
    font-weight: 500;
    font-size: 1rem;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition);
}

.hero-buttons a:hover {
    border-bottom-color: var(--gold);
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }
}

/* ========================================
   Buttons (legacy - mostly unused now)
   ======================================== */

/* ========================================
   About Section
   ======================================== */
.about-content {
    max-width: 900px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 900px) {
    .about-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.about-main h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.mission-text {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: var(--gray-700);
}

.values-list {
    list-style: disc;
    padding-left: 1.5rem;
}

.values-list li {
    margin-bottom: 0.75rem;
    color: var(--gray-700);
}

.about-sidebar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.stat-card {
    background: var(--navy);
    color: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--gold);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-300);
}

.affiliation-note {
    margin-top: 3rem;
    padding: 1.5rem;
    background: var(--gray-100);
    border-radius: 8px;
    border-left: 4px solid var(--gold);
}

.affiliation-note p {
    color: var(--gray-700);
}

.affiliation-note a {
    color: var(--navy);
    font-weight: 600;
}

/* ========================================
   Topics Section
   ======================================== */
.topics-grid {
    columns: 2;
    column-gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.topic-card {
    break-inside: avoid;
    margin-bottom: 1.5rem;
    page-break-inside: avoid;
}

.topic-card h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--navy);
    font-weight: 700;
}

.topic-card p {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.6;
}

@media (max-width: 640px) {
    .topics-grid {
        columns: 1;
    }
}

/* ========================================
   Membership Section
   ======================================== */
.membership-grid {
    max-width: 900px;
    margin: 0 auto;
    overflow-x: auto;
}

.membership-grid table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border: 1px solid var(--gray-300);
}

.membership-grid th {
    background: var(--navy);
    color: var(--white);
    padding: 1rem;
    text-align: left;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    border-bottom: 3px solid var(--gold);
}

.membership-grid td {
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
    font-size: 0.95rem;
    line-height: 1.6;
}

.membership-grid tr:last-child td {
    border-bottom: none;
}

.membership-grid tr:nth-child(even) {
    background: var(--gray-50);
}

.membership-grid .tier-name {
    font-weight: 700;
    color: var(--navy);
    white-space: nowrap;
}

.membership-grid .tier-price {
    font-weight: 700;
    color: var(--gold-dark);
    font-size: 1.05rem;
    white-space: nowrap;
}

.membership-cta {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem;
    background: var(--gray-100);
    border-radius: 8px;
}

.membership-cta a {
    color: var(--navy);
    font-weight: 600;
}

/* ========================================
   Conference Section
   ======================================== */
.conference-highlight {
    background: var(--navy);
    color: var(--white);
    padding: 3rem;
    border-left: 4px solid var(--gold);
    margin-bottom: 3rem;
}

.conference-info h3 {
    color: var(--white);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.conference-date {
    font-size: 1.25rem;
    color: var(--gold);
    font-weight: 600;
}

.conference-location,
.conference-format,
.conference-deadline {
    color: var(--gray-300);
    line-height: 1.8;
}

.coming-soon {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--gold);
    color: var(--navy-dark);
    border-radius: 3px;
    font-weight: 600;
    margin-top: 1rem;
}

.program-grid {
    max-width: 800px;
    margin: 2rem auto 0;
}

.program-item {
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.program-item:first-child {
    border-top: 1px solid var(--gray-200);
}

.program-item h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--navy);
    font-weight: 700;
}

.program-item p {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.6;
}

.submission-info {
    background: var(--gray-50);
    padding: 2rem;
    margin-top: 2rem;
    border-left: 3px solid var(--gold);
}

.submission-info p {
    margin-bottom: 1rem;
    color: var(--gray-700);
}

.submission-info ul {
    list-style: disc;
    padding-left: 1.5rem;
    margin-top: 1rem;
}

.submission-info li {
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

/* ========================================
   Awards Section
   ======================================== */
.awards-grid {
    max-width: 800px;
    margin: 0 auto;
}

.award-card {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.award-card:first-child {
    border-top: 1px solid var(--gray-200);
}

.award-prize {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gold-dark);
    margin-bottom: 0.25rem;
    display: inline-block;
    min-width: 120px;
}

.award-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--navy);
    display: inline;
}

.award-card p {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-top: 0.5rem;
    line-height: 1.6;
}

.awards-note {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--gray-100);
    border-radius: 8px;
    text-align: center;
}

.awards-note h4 {
    margin-bottom: 0.5rem;
}

.awards-note p {
    color: var(--gray-600);
}

/* ========================================
   People Section
   ======================================== */
.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.person-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
}

.person-avatar {
    width: 80px;
    height: 80px;
    background: var(--navy);
    color: var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.person-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.person-role {
    color: var(--gold-dark);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.person-affiliation {
    color: var(--gray-700);
    font-size: 0.9rem;
}

.person-info {
    color: var(--gray-500);
    font-size: 0.8rem;
}

.people-grid-small {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.person-card-small {
    background: var(--white);
    padding: 1.25rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
}

.person-card-small h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.person-card-small p {
    color: var(--gray-600);
    font-size: 0.85rem;
}

.committees-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.committee-item {
    padding: 1rem;
    background: var(--white);
    border-radius: 6px;
    border: 1px solid var(--gray-200);
}

.committee-item h4 {
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.committee-item p {
    font-size: 0.8rem;
    color: var(--gray-500);
}

/* Compact Advisory Board List */
.advisory-list {
    line-height: 2.2;
    color: var(--gray-700);
    text-align: center;
    font-size: 0.95rem;
}

.advisory-list strong {
    color: var(--navy);
    font-weight: 600;
}

.advisory-list span {
    color: var(--gray-500);
    font-size: 0.85rem;
}

/* Compact Committees List */
.committees-inline {
    columns: 2;
    column-gap: 3rem;
    list-style: disc;
    padding-left: 1.5rem;
}

.committees-inline li {
    break-inside: avoid;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.committees-inline li strong {
    color: var(--navy);
}

/* ========================================
   Publications Section
   ======================================== */
.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.publication-section {
    background: var(--white);
    padding: 2rem;
    border: 1px solid var(--gray-200);
}

.publication-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--navy);
}

.publication-section ul {
    list-style: disc;
    padding-left: 1.5rem;
}

.publication-section li {
    margin-bottom: 0.5rem;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.wp-sample {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--gray-100);
    border-radius: 6px;
}

.wp-note {
    color: var(--gray-500);
    font-style: italic;
    font-size: 0.9rem;
}

.journal-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--navy);
    color: var(--white);
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
}

.journal-link:hover {
    background: var(--navy-light);
    color: var(--white);
}

.sigs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.sig-item {
    padding: 1.25rem;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    border-left: 3px solid var(--gold);
}

.sig-item h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.sig-item p {
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* ========================================
   Contact Section
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.contact-info h3,
.contact-social h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--gray-700);
}

.contact-item a {
    color: var(--navy);
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--navy);
    color: var(--white);
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
}

.social-link:hover {
    background: var(--navy-light);
    color: var(--white);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--navy-dark);
    color: var(--gray-300);
    padding: 3rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2rem;
}

.footer-brand {
    max-width: 250px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.footer-brand p {
    color: var(--gray-400);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.footer-tagline {
    color: var(--gold);
    font-size: 0.85rem;
}

.footer-links h4 {
    color: var(--white);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.footer-links ul li {
    margin-bottom: 0.4rem;
}

.footer-links a {
    color: var(--gray-400);
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: var(--gold);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--gray-700);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
}

.footer-bottom a {
    color: var(--gold);
}

/* ========================================
   Logo in Navbar
   ======================================== */
.logo-img {
    height: 45px;
    width: auto;
}

/* ========================================
   Partners Strip
   ======================================== */
.partners-strip {
    background: var(--white);
    padding: 2rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.partners-label {
    text-align: center;
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.partner-logo {
    opacity: 0.8;
    transition: opacity var(--transition);
}

.partner-logo:hover {
    opacity: 1;
}

.partner-logo img {
    height: 40px;
    width: auto;
}

/* ========================================
   News Section - Timeline Format
   ======================================== */
.news-grid {
    max-width: 800px;
    margin: 0 auto;
}

.news-card {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 2rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.news-card:first-child {
    border-top: 1px solid var(--gray-200);
}

.news-date {
    font-size: 0.9rem;
    color: var(--gold-dark);
    font-weight: 600;
    text-align: right;
    padding-right: 2rem;
    border-right: 3px solid var(--gold);
}

.news-card.featured-news .news-date {
    font-size: 1rem;
    font-weight: 700;
}

.news-content h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--navy);
}

.news-content p {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.news-tag {
    display: inline-block;
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    background: var(--gray-100);
    color: var(--gray-600);
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.news-link {
    display: inline-block;
    font-size: 0.9rem;
    color: var(--navy);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.news-link:hover {
    color: var(--gold-dark);
}

@media (max-width: 640px) {
    .news-card {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .news-date {
        text-align: left;
        padding-right: 0;
        border-right: none;
        border-bottom: 2px solid var(--gold);
        padding-bottom: 0.5rem;
    }
}

/* ========================================
   Core Team Styles
   ======================================== */
.core-team {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.featured-person {
    border: 2px solid var(--gold);
}

.featured-person .person-avatar {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
}

/* ========================================
   Conference Deadline
   ======================================== */
.conference-deadline {
    color: var(--gold-light);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* ========================================
   Footer Partners
   ======================================== */
.footer-partners {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--gray-700);
    margin-top: 2rem;
}

.footer-partners h4 {
    color: var(--gray-400);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.footer-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-logos a {
    opacity: 0.6;
    transition: opacity var(--transition);
}

.footer-logos a:hover {
    opacity: 1;
}

.footer-logos img {
    height: 35px;
    width: auto;
    filter: brightness(0) invert(1);
}

/* ========================================
   Left Sidebar Navigation
   ======================================== */
.sidebar {
    position: fixed;
    top: 70px;
    left: 0;
    width: 220px;
    height: calc(100vh - 70px);
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    padding: 1.5rem 0;
    overflow-y: auto;
    z-index: 900;
    transition: transform 0.3s ease;
}

.sidebar-nav {
    padding: 0 0.5rem;
}

.sidebar-section {
    margin-bottom: 1.5rem;
}

.sidebar-section-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
    padding: 0.5rem 1rem;
    font-weight: 600;
}

.sidebar-nav a {
    display: block;
    padding: 0.625rem 1rem;
    font-size: 0.85rem;
    color: var(--gray-700);
    border-radius: 6px;
    margin-bottom: 2px;
    transition: all var(--transition);
    line-height: 1.6;
}

.sidebar-nav a:hover {
    background: var(--gray-100);
    color: var(--navy);
}

.sidebar-nav a.active {
    background: transparent;
    color: var(--navy);
    border-left: 3px solid var(--gold);
    padding-left: calc(1rem - 3px);
}

.sidebar-nav .sig-link {
    padding-left: 1.5rem;
    font-size: 0.8rem;
}

.sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 1rem;
    left: 1rem;
    width: 48px;
    height: 48px;
    background: var(--navy);
    color: var(--white);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    z-index: 1001;
    font-size: 1.25rem;
}

/* Main content with sidebar */
.main-content {
    margin-left: 220px;
    transition: margin-left 0.3s ease;
}

/* Adjust hero for sidebar */
.main-content .hero {
    min-height: calc(100vh - 70px);
}

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .main-content {
        margin-left: 0;
    }
}

/* ========================================
   Leadership Team Styles
   ======================================== */
.leadership-team {
    max-width: 900px;
    margin: 0 auto 3rem;
}

.leader-card {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.leader-card:first-child {
    border-top: 1px solid var(--gray-200);
}

.leader-card.president {
    padding: 1.5rem 0;
    border-top: 3px solid var(--gold);
    border-bottom: 3px solid var(--gold);
}

.leader-badge {
    display: none;
}

.leader-avatar {
    display: none;
}

.leader-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: var(--navy);
    font-weight: 700;
}

.leader-role {
    color: var(--gold-dark);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.leader-affiliation {
    color: var(--gray-700);
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.leader-info {
    color: var(--gray-500);
    font-size: 0.85rem;
    font-style: italic;
}

/* ========================================
   SIG Link Cards
   ======================================== */
.sig-link-card {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
    transition: color var(--transition);
}

.sig-link-card:first-child {
    border-top: 1px solid var(--gray-200);
}

.sig-link-card:hover h4 {
    color: var(--gold-dark);
}

.sig-link-card h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--navy);
    font-weight: 700;
    transition: color var(--transition);
}

.sig-link-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin: 0;
}

.sig-link-card .sig-arrow {
    display: none;
}

/* ========================================
   SIG Subpage Styles
   ======================================== */
.sig-hero {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
    padding: 6rem 1.5rem 3rem;
    text-align: center;
    margin-top: 70px;
}

.sig-hero h1 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.sig-hero p {
    color: var(--gold);
    font-size: 1.25rem;
}

.sig-breadcrumb {
    padding: 1rem 0;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.sig-breadcrumb a {
    color: var(--gray-500);
    font-size: 0.85rem;
}

.sig-breadcrumb span {
    color: var(--gray-400);
    margin: 0 0.5rem;
}

.sig-content {
    padding: 3rem 0;
}

.sig-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

@media (max-width: 900px) {
    .sig-grid {
        grid-template-columns: 1fr;
    }
}

.sig-main h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--gray-200);
}

.sig-main h3 {
    font-size: 1.2rem;
    margin: 2rem 0 1rem;
}

.sig-main p {
    margin-bottom: 1rem;
    color: var(--gray-700);
}

.sig-main ul {
    list-style: disc;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.sig-main li {
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.sig-sidebar-card {
    background: var(--white);
    padding: 1.5rem;
    border: 1px solid var(--gray-200);
    margin-bottom: 1.5rem;
}

.sig-sidebar-card h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--gold);
}

.sig-leader {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.sig-leader-avatar {
    width: 50px;
    height: 50px;
    background: var(--navy);
    color: var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.sig-leader-info h5 {
    font-size: 0.95rem;
    margin-bottom: 0.1rem;
}

.sig-leader-info p {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin: 0;
}

.sig-event {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
}

.sig-event:last-child {
    border-bottom: none;
}

.sig-event-date {
    font-size: 0.75rem;
    color: var(--gold-dark);
    font-weight: 600;
}

.sig-event-title {
    font-size: 0.9rem;
    color: var(--navy);
}

.sig-resource-link {
    display: block;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--navy);
    border-bottom: 1px solid var(--gray-100);
}

.sig-resource-link:hover {
    color: var(--gold-dark);
}

.sig-join-btn {
    display: block;
    width: 100%;
    padding: 0.75rem;
    background: var(--navy);
    color: var(--white);
    text-align: center;
    border-radius: 6px;
    font-weight: 600;
    margin-top: 1rem;
}

.sig-join-btn:hover {
    background: var(--navy-light);
    color: var(--white);
}

/* Simplified Sidebar Sections (Academic Style) */
.sig-sidebar-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.sig-sidebar-section:last-child {
    border-bottom: none;
}

.sig-sidebar-section h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--gold);
}

.sig-sidebar-section p {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--gray-700);
}

.sig-sidebar-section ul {
    list-style: disc;
    padding-left: 1.25rem;
    font-size: 0.9rem;
}

.sig-sidebar-section li {
    margin-bottom: 0.35rem;
}

.sig-sidebar-section a {
    color: var(--navy);
    font-size: 0.9rem;
}

.sig-sidebar-section a:hover {
    color: var(--gold-dark);
}

/* ========================================
   Utilities
   ======================================== */
@media (max-width: 640px) {
    .section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .conference-highlight {
        padding: 2rem;
    }

    .partners-logos {
        gap: 1rem;
    }

    .partner-logo img {
        height: 30px;
    }

    .logo-img {
        height: 35px;
    }

    .membership-grid table {
        font-size: 0.85rem;
    }

    .membership-grid th,
    .membership-grid td {
        padding: 0.75rem 0.5rem;
    }

    .committees-inline {
        columns: 1;
    }
}