.about-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 20px 0 40px;
}

/* ── Header ─────────────────────────────────────────────── */
.about-header {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-bottom: 36px;
    padding-bottom: 28px;
    border-bottom: 1px solid #ddd;
}

.about-header-logo {
    flex-shrink: 0;
    width: 240px;
}

.about-header-logo img {
    width: 100%;
}

.about-header-text h1 {
    margin: 0 0 8px;
    font-size: 1.6rem;
    color: #186eb3;
}

.about-header-text p {
    margin: 0;
    line-height: 1.6;
}

/* ── Cards ───────────────────────────────────────────────── */
.about-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 28px;
}

.about-card {
    background: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 24px 28px;
}

.about-card h2 {
    margin: 0 0 12px;
    font-size: 1.05rem;
    color: #186eb3;
    letter-spacing: 0.01em;
}

.about-card p {
    margin: 0 0 18px;
    line-height: 1.6;
    font-size: 0.95rem;
}

.about-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.about-btn {
    display: inline-block;
    padding: 8px 20px;
    background-color: #186eb3;
    color: white !important;
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
    transition: background-color 0.15s;
}

.about-btn:hover {
    background-color: #1258a0;
}

.about-btn.secondary {
    background-color: transparent;
    color: #186eb3 !important;
    border: 1px solid #186eb3;
    box-shadow: none;
}

.about-btn.secondary:hover {
    background-color: #e8f0f8;
}

/* ── Citation ─────────────────────────────────────────────── */
.about-citation {
    border-left: 4px solid #186eb3;
    background: #f0f6ff;
    border-radius: 0 8px 8px 0;
    padding: 24px 28px;
    margin-bottom: 36px;
}

.about-citation h2 {
    margin: 0 0 10px;
    font-size: 1.1rem;
    color: #186eb3;
}

.about-citation p {
    margin: 0 0 14px;
    font-size: 1rem;
    line-height: 1.65;
}

.about-citation a {
    color: #186eb3;
    font-weight: 600;
    font-size: 1rem;
}

/* ── Footer logo ─────────────────────────────────────────── */
.about-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-top: 20px;
    border-top: 1px solid #ddd;
}

.about-footer img {
    width: 180px;
    opacity: 0.85;
}

/* ── Dark mode ───────────────────────────────────────────── */
.darkmode .about-header {
    border-bottom-color: #555;
}

.darkmode .about-header-text h1 {
    color: #5aadff;
}

.darkmode .about-card {
    background: #2e2c2b;
    border-color: #555;
}

.darkmode .about-card h2 {
    color: #5aadff;
}

.darkmode .about-citation {
    background: #1e2d3d;
    border-left-color: #5aadff;
}

.darkmode .about-citation h2,
.darkmode .about-citation a {
    color: #5aadff;
}

.darkmode .about-btn.secondary {
    color: #5aadff !important;
    border-color: #5aadff;
}

.darkmode .about-btn.secondary:hover {
    background-color: #1e2d3d;
}

.darkmode .about-footer {
    border-top-color: #555;
}

.darkmode .about-header-logo img,
.darkmode .about-footer img {
    filter: invert(1) hue-rotate(180deg);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 600px) {
    .about-cards {
        grid-template-columns: 1fr;
    }
    .about-header {
        flex-direction: column;
        text-align: center;
    }
}