/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --navy: #1A3557;
    --navy-dark: #0F2339;
    --gold: #D4AF37;
    --gold-light: #F4E5C2;
    --white: #FFFFFF;
    --gray-light: #F5F7FA;
    --gray-medium: #E1E8ED;
    --gray-dark: #657786;
    --text-dark: #14171A;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--navy-dark);
}

h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--navy);
    transition: color 0.3s ease;
}

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

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--navy);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    font-weight: 500;
    color: var(--navy);
}

.nav-menu a:hover {
    color: var(--gold);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--gold);
    color: var(--navy-dark);
}

.btn-primary:hover {
    background: var(--navy);
    color: var(--white);
    border-color: var(--gold);
}

.btn-secondary {
    background: transparent;
    color: var(--navy);
    border: 2px solid var(--navy);
}

.btn-secondary:hover {
    background: var(--navy);
    color: var(--white);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    color: var(--white);
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--gold-light);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 2.5rem;
    color: var(--gray-light);
}

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

/* About Section */
.about {
    padding: 5rem 0;
    background: var(--white);
}

.about h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.about-content {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
    max-width: 1100px;
    margin: 0 auto;
}

.about-photo {
    flex-shrink: 0;
}

.about-photo img {
    width: 280px;
    height: 280px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    border: 4px solid var(--gold);
}

.about-text {
    flex: 1;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

/* Speaking Section */
.speaking {
    padding: 5rem 0;
    background: var(--gray-light);
}

.speaking h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.keynote-feature {
    background: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    margin-bottom: 4rem;
    border-left: 6px solid var(--gold);
}

.keynote-feature h3 {
    color: var(--navy);
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.keynote-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.25rem;
    color: var(--text-dark);
}

.speaking-topics h3 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--navy);
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.topic-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.topic-card h4 {
    color: var(--navy);
    margin-bottom: 1rem;
    font-size: 1.375rem;
}

.topic-card p {
    color: var(--gray-dark);
    line-height: 1.7;
}

.speaking-cta {
    text-align: center;
    margin-top: 3rem;
}

/* Articles Section */
.articles {
    padding: 5rem 0;
    background: var(--white);
}

.articles h2 {
    text-align: center;
    margin-bottom: 1rem;
}

.section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--gray-dark);
    max-width: 700px;
    margin: 0 auto 3rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.article-card {
    background: var(--white);
    border: 1px solid var(--gray-medium);
    border-radius: 12px;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    border-color: var(--gold);
}

.article-date {
    font-size: 0.875rem;
    color: var(--gray-dark);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.article-card h3 {
    font-size: 1.375rem;
    margin-bottom: 1rem;
}

.article-card h3 a {
    color: var(--navy);
}

.article-card h3 a:hover {
    color: var(--gold);
}

.article-excerpt {
    color: var(--gray-dark);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.article-link {
    color: var(--navy);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* Contact Section */
.contact {
    padding: 5rem 0;
    background: var(--gray-light);
}

.contact h2 {
    text-align: center;
    margin-bottom: 1rem;
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--navy);
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--gray-medium);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--gold);
}

.form-group textarea {
    resize: vertical;
}

.contact-form button {
    width: 100%;
}

/* Footer */
.footer {
    background: var(--navy-dark);
    color: var(--white);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    color: var(--gold);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.footer-col p {
    color: var(--gray-light);
    line-height: 1.7;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--gray-light);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--gray-light);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .nav-menu {
        gap: 1rem;
        font-size: 0.875rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .about-content {
        flex-direction: column;
        align-items: center;
    }

    .about-photo img {
        width: 220px;
        height: 220px;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }

    .keynote-feature {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }

    .container {
        padding: 0 15px;
    }
}