/* Base Variables */
:root {
    --csub-blue: #003594;
    --csub-dark-blue: #001A70;
    --csub-gold: #FFC72C;
    --csub-gray: #707372;

    --primary-color: var(--csub-blue);
    --primary-dark: var(--csub-dark-blue);
    --accent-color: var(--csub-gold);

    --text-color: #1f2937;
    --light-text: #4b5563;
    --bg-color: #ffffff;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;

    --max-width: 1100px;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-body);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
}

a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    margin-bottom: 0.5em;
    font-weight: 700;
}

p { margin-bottom: 1rem; }

/* Header */
.header {
    background: var(--white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    border-top: 5px solid var(--primary-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo-area {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-sub {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--light-text);
    font-weight: 400;
}

.nav-list {
    display: flex;
    gap: 1.25rem;
    align-items: center;
}

.nav-list a {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-color);
    white-space: nowrap;
}

.nav-list a:hover { color: var(--primary-color); }

.btn-contact {
    background-color: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1.2rem;
    border-radius: 9999px;
    transition: all 0.3s;
}

.btn-contact:hover {
    background-color: var(--accent-color);
    color: var(--primary-color) !important;
    font-weight: 600;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, rgba(0,53,148,0.06) 0%, rgba(255,199,44,0.06) 100%);
}

.hero-content {
    max-width: 1000px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.hero-photo {
    max-width: 100%;
}

.hero-photo img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.hero-photo-caption {
    font-size: 0.8rem;
    color: var(--light-text);
    text-align: center;
    margin-top: 0.5rem;
}

.hero-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--light-text);
    margin-bottom: 0.5rem;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.hero-text h2 {
    font-family: var(--font-body);
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--light-text);
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--accent-color);
    padding-left: 1rem;
}

.hero-text > p {
    font-size: 1.05rem;
    color: var(--text-color);
    margin-bottom: 2rem;
    max-width: 650px;
}

.hero-actions { display: flex; gap: 1rem; margin-bottom: 2rem; }

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0,53,148,0.2);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--light-bg);
    transform: translateY(-2px);
}

/* Sections */
.section { padding: 5rem 0; }
.section.bg-light { background-color: var(--light-bg); }

.section-title {
    font-size: 2.2rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

.section-subtitle {
    text-align: center;
    color: var(--light-text);
    font-size: 1rem;
    margin-bottom: 3rem;
}

/* Mission Cards */
.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.mission-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary-color);
    text-align: center;
    transition: transform 0.2s;
}

.mission-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.mission-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.mission-card h3 {
    font-size: 1.15rem;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.mission-card p {
    font-size: 0.95rem;
    color: var(--light-text);
    margin-bottom: 0;
}

/* Members Section */
.advisor-section {
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

.advisor-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
    border-left: 5px solid var(--accent-color);
    text-align: center;
}

.advisor-photo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem auto;
    display: block;
}

.advisor-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 0.5rem;
}

.advisor-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.advisor-info .role {
    font-weight: 600;
    color: var(--accent-color);
    background: var(--primary-color);
    display: inline-block;
    padding: 0.2rem 0.8rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
}

.advisor-info p {
    color: var(--light-text);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.team-heading {
    text-align: center;
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.member-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.2s;
}

.member-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.08);
}

.member-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    margin: 0 auto 1rem auto;
}

.member-photo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem auto;
    display: block;
}

.member-linkedin {
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.member-linkedin:hover {
    text-decoration: underline;
}

.member-card h4 {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.member-role {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.member-level {
    font-size: 0.8rem;
    color: var(--light-text);
    margin-bottom: 0;
}

/* People */
.people-heading {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 2.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-light);
}

.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.person-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
    display: flex;
    gap: 1rem;
    align-items: center;
    transition: transform 0.2s;
}

.person-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.08);
}

.person-photo {
    width: 72px;
    min-width: 72px;
    max-width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.person-avatar {
    width: 72px;
    min-width: 72px;
    max-width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.person-info h4 {
    font-family: var(--font-body);
    font-size: 1rem;
    margin-bottom: 0.15rem;
}

.person-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.1rem;
}

.person-affiliation {
    font-size: 0.8rem;
    color: var(--light-text);
    margin-bottom: 0.25rem;
}

.person-links {
    display: flex;
    gap: 0.75rem;
}

.person-links a {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary-color);
    text-decoration: none;
}

.person-links a:hover {
    text-decoration: underline;
}

/* Projects */
.projects-list {
    max-width: 800px;
    margin: 0 auto;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
    margin-bottom: 1.5rem;
    border-left: 5px solid var(--primary-color);
    transition: transform 0.2s;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.08);
}

.project-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.project-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.project-badge.grad {
    background-color: var(--primary-color);
    color: white;
}

.project-badge.undergrad {
    background-color: var(--accent-color);
    color: var(--primary-dark);
}

.project-header h3 {
    font-family: var(--font-body);
    font-size: 1.15rem;
    color: var(--text-color);
    margin-bottom: 0;
}

.project-info {
    flex: 1;
    min-width: 0;
}

.project-info > p,
.project-card > p {
    color: var(--light-text);
    font-size: 0.95rem;
}

.project-video {
    flex-shrink: 0;
    width: 320px;
}

.project-video iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
}

@media (max-width: 768px) {
    .project-card {
        flex-direction: column;
    }
    .project-video {
        width: 100%;
    }
}

.project-team {
    display: flex;
    gap: 0.5rem;
    align-items: baseline;
    font-size: 0.9rem;
    color: var(--light-text);
    margin-top: 0.5rem;
}

.project-team strong {
    color: var(--text-color);
    white-space: nowrap;
}

.project-status { margin-top: 0.75rem; }

.status-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
}

.status-badge.active {
    background-color: #dcfce7;
    color: #166534;
}

/* News */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.news-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    border-top: 3px solid var(--border-color);
    transition: transform 0.2s;
}

.news-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.08);
}

.news-card.featured {
    border-top-color: var(--accent-color);
    grid-column: 1 / -1;
}

.news-date {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.news-card h3 {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.news-card p {
    font-size: 0.95rem;
    color: var(--light-text);
    margin-bottom: 0;
}

.news-media {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.news-video {
    flex: 1;
    min-width: 0;
}

.news-video iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
}

.news-photo {
    flex: 1;
    border-radius: 8px;
    object-fit: cover;
    max-height: 250px;
}

@media (max-width: 600px) {
    .news-media {
        flex-direction: column;
    }
}

/* Join / Footer CTA */
.footer-cta {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 5rem 0;
}

.footer-cta h2 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 2.2rem;
}

.join-description {
    color: #cbd5e1;
    max-width: 700px;
    margin: 0 auto 2.5rem auto;
    font-size: 1.05rem;
    line-height: 1.7;
}

.join-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 700px;
    margin: 0 auto 2.5rem auto;
    text-align: left;
}

.join-item h4 {
    color: var(--accent-color);
    font-family: var(--font-body);
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.join-item ul {
    list-style: none;
    padding: 0;
}

.join-item li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    color: #e2e8f0;
}

.join-item li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: 700;
}

.join-cta {
    margin-top: 1rem;
}

.join-cta p {
    color: #94a3b8;
    margin-bottom: 1rem;
}

.btn-outline-white {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-outline-white:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

.btn-icon {
    height: 20px;
    width: auto;
}

.btn-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-text:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background-color: #f1f5f9;
    text-align: center;
    padding: 2rem 0;
    color: var(--csub-gray);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

/* Tablet - hide logo subtitle */
@media (max-width: 1024px) {
    .logo-sub { display: none; }
}

/* Mobile */
@media (max-width: 900px) {
    .hamburger {
        display: block;
        width: 30px;
        height: 24px;
        position: relative;
    }

    .hamburger span {
        display: block;
        width: 100%;
        height: 3px;
        background-color: var(--primary-color);
        margin-bottom: 5px;
        border-radius: 2px;
    }

    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        padding: 1rem;
        box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        display: none;
    }

    .nav.active { display: block; }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .btn-contact {
        display: block;
        text-align: center;
        width: 100%;
    }

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

    .hero-content { flex-direction: column; }

    .hero-photo { max-width: 100%; }

    .hero { padding: 4rem 0; }

    .section { padding: 3rem 0; }

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

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

    .project-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }

    .news-card.featured { grid-column: auto; }

    .join-details { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-text h1 { font-size: 2rem; }
    .mission-grid { grid-template-columns: 1fr; }
    .members-grid { grid-template-columns: 1fr; }
}